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Sample command line utilities around the Salesforce Dependencies API implemented as SFDX plugin. The plugin is NOT a Salesforce supported project and release as a community project under open source licenses. Anyone is invited to help improve and extend the code. This project implements an SFDX plugin for the Salesforce Dependencies API. With the plugin you are able to analyze dependencies between Salesforce second-generation packages as well as dependencies between Salesforce objects deployed in your org. The plugin is meant for Salesforce developers and administrators trying to Analyze package and object level dependencies Untangle large monolithic orgs to split into smaller (more managable) orgs Indentify and extract base packages with shared objects Identify package level version dependencies The plugin does not automate any of these steps but uses graph technology to help navigate the complexities of a Salesforce org. 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Install Install the Salesforce CLI (SFDX) npm install sfdx-cli --global Make sure you have the latest version npm update sfdx-cli --global Install the plugin via npm npm install dependencies-cli --global Test the plugin sfdx dependency returns Sample command line utilities around the Salesforce Dependencies API implemented as SFDX plugin. USAGE $ sfdx dependency:COMMAND COMMANDS TOPICS Run help for each topic below to view subcommands dependency:component Analyzes object level dependencies in your org dependency:package Analyzes package level dependencies in your dev project Authorize an org For production orgs use sfdx force:auth:web:login For sandbox orgs use sfdx force:auth:web:login -r https://test.salesforce.com returns You may now close the browser Usage The plugin implements two topics with a couple of commmands each: dependency |-component |---componentizer |---report |-package |---merge |---version The two topics help with two disjoint sets of questions where: dependency:component Analyzes object level dependencies in your org dependency:package Analyzes package level dependencies in your dev project Following are a details for every command to illustrate usage only. For detailed command descriptions use sfdx dependency:COMMAND --help dependency:component Analyzes object level dependencies in your org. All commands are based on the Salesforce Dependencies API and require an org connection with the -u, --targetusername=targetusername option. dependency:component:componentizer Return all leaf nodes in the directed component dependency graph. USAGE: ] [--json] The response lists the leaf nodes in the directed component dependency graph in a text form, grouped by object type. For example: CustomField: CustomerPriority(00N2E000008r3MxUAI) NumberofLocations(00N2E000008r3MyUAI) SLA(00N2E000008r3MzUAI) SLAExpirationDate(00N2E000008r3N0UAI) WebLink: View Campaign Influence Report(00b2E000001Yj9ZQAS) Billing(00b2E000001Yj9bQAC) Up-sell / Cross-sell Opportunity(00b2E000001Yj9cQAC) dependency:component:report Produces a dependency graph representing all object level dependencies in your org. USAGE: ] [--json] This command produces a DOT formatted output by default if no --json option is used. Following is an example output. X00N11000002qGqQEAU } DOT formatted output can easily be converted into a vector graph (SVG). You can either paste the output directly into this website for online rendering, or install software to build static or interactive SVG (using d3.js). 1. Render the SVG as dependency graph in an image requires Graphviz brew install graphviz produce the DOT graph file output sfdx dependency:component:report -u [alias|username] -r dot | tee graph.dot convert the DOT file to SVG graph.svg open the SVG directly in your browser (Google Chrome works best) open -a "Google Chrome" graph.svg Following is a small example of a static SVG produced with this process. 2. Render the SVG as d3-force graph There are two options to launch the D3 graph, using either a pre-deployed Heroku app or running the app locally. 2.1 Use the Node.js app deployed at https://sfdc-mdapi-graph.herokuapp.com produce the graph in JSON format sfdx dependency:component:report -u [alias|username] --json | tee graph.json open the browser with https://sfdc-mdapi-graph.herokuapp.com and load the produced JSON file to render open -a "Google Chrome" https://sfdc-mdapi-graph.herokuapp.com 2.2 Run the Node.js app locally start the local Node.js server npm start & produce the graph in JSON format sfdx dependency:component:report -u [alias|username] --json | tee graph.json open the browser with http://localhost:8080 and select the produced JSON file to render open -a "Google Chrome" http://localhost:8080 to kill the local Node.js server use npm stop Here an example of an interactive force directed D3 graph rendered with the above process. The force directed graph supports actions to navigate a large graph better, including: filter and selection by node type filter and selection by node name show/hide labels freeze the graph simulation recenter the graph expand the graph for readibility collapse the graph to identify center of gravity remove individual nodes remove a connected graph for a given node expand the fully connected graph for a given node export filtered subgraph Using D3.js technology is an attempt to manage large graphs more easily. In addition, one can pass flags to the SFDX plugin directly to apply query filters based on type and thus reduce the output. dependency:package Analyzes package level dependencies in your development projects. All commands expect a 2nd generation Salesforce project with one or multiple package.xml. dependency:package:merge Merge multiple package.xmls to create one base package.xml containing only those objects available across all packages. This function computes the intersection of multiple first generation packages. USAGE: ] [--json] This command produces a properly formatted package.xml as the result of the merge operation, for example: dependency:package:version Analyze version dependencies for packages deployed in your org using the 2nd generation development process. The command is required to run from within the SFDX project development folder and needs an org connection with the -u, --targetusername=targetusername option. USAGE: ] This command produces a DOT formatted output: X04tB0000000KAekIAG } To render the output as SVG use the instructions at Render the SVG as dependency graph in an image. Following is an example of a package dependency graph with version details. Build and Debug There are two options to A) build and deploy the sfdx plugin or B) build the node.js application for local testing. Option B is interesting only if you want to maintain different versions, one deployed as SFDX plugin and another one for development testing. Build time is equally fast for both options. A Build the SFDX plugin Uninstall the existing plugin sfdx plugins:uninstall dependencies-cli Build and install the plugin from the project root folder sfdx plugins:link ./ Optionally: in case of errors due to missing dependencies, install them with npm --save Test the plugin sfdx dependency B Build the node.js application for local testing Run yarn clean in the project root folder yarn run clean Optionally: run yarn install in case you used npm package installer to manually install packages yarn install Build the code using npm run scripts in the project root folder npm run-script build Test your changes with a local bin/run script bin/run dependency C Debug the SFDX plugin (with VSCode) Run the plugin in debug mode --dev-suspend Attach VS Code Debugger to D Debug the node.js application locally Before linking the plugin to Salesforce CLI run NODE_OPTIONS=--inspect-brk bin/run dependency Attach VS Code Debugger to Troubleshooting ERROR running dependency:component:componentizer: sObject type 'MetadataComponentDependency' is not supported. Explanation: This error indicates that your org does not have the metadata dependency API enabled. The API is still in beta for production orgs as of release Summer`19. Resolution: Contact your Salesforce support and provide them the to work with. Salesforce support should enable the Enable MetadataComponentDependency API perm for your org. ERROR running dependency:component:componentizer: No AuthInfo found for name Explanation: This error indicates that you forgot to provide the -u flag needed for the command execution. The SFDX plugin attempts to use the default user id but requires dedicated authentication info. Resolution: Supply the option with the command. ERROR dependencyGraph::retrieveRecords().err sObject type 'CustomField' is not supported. Explanation: This error happens with certain orgs where not all metadata object types are supported for query with the tooling API. The error is not fatal and a graph will be produced to STDOUT including all supported metadata types. The error logged to STDERR includes details for the query in question, for example: dependencyGraph::retrieveRecords().query SELECT Id, TableEnumOrId FROM CustomField c WHERE c.Id In ('00h0M00000FoNWnQAN','00h30000000i0DcAAI','00h300000012QrnAAE','00h300000012oWtAAI','00h3000000133AJAAY','00h30000001MDH9AAO','00h30000001OIu3AAG','00h30000001OKZ1AAO','00h30000001OLxMAAW','00h30000000gnhbAAA') limit 2000 Resolution: Contact support to investigate the settings for your org and enable the failing metadata type queries.

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Everything you need to know about java certification

In the corporate world, industry-level certification plays an important role. It not only improvises the person's skills but also qualifies the person to stand out among the crowd. In several software domain places; java is one of the most prominent programming languages. If you are attaining the interview java certification adds value to your profile.

What is java programming?

Java is a high-level programming language that is developed by sun microsystems. Java programming language is not similar to other programming languages like C, C++ but a lot easier. Even you can compare Java with other technologies like node Js, Android, Spring, J2EEetc to form portable, scalable, robust, and distributed applications. Java also promotes continuous testing and integration tools like selenium. Here comes some of the reasons to get a java certification.

Hiring preference

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You are able to view the salary packages differences between the java developers and certified java professionals. The only reason behind it is a skillset, it gets increased while attaining java online training. Certain companies are hiring only certified java professionals for a particular job role.

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Many companies are taking steps to help their employees to complete the certifications that can broaden their technical skills. It is providing success for both employees and organizations. Even the cost for the java course is paid by the companies along with the java certification cost as they want their employees to enhance their skills and certified employees would be able to uplift the organizational growth.

Increase the confidence level

By pursuing java training you can increase your confidence level hence you would know more about java concepts without any real-time java programming experience. While attaining an interview this confidence level will reflect in that situation. A certified person can easily undergo the interview process by answering all the questions even the complicated one with maximum efficiency and this makes the company hire you. Even if you can demand better offers from your company the java skill set they possessed will surely benefit them.

Career options for certified java programmers

Here comes some of the best career option available for certified Java professionals

DevOps engineer

The person who is interested in doing scripting and coding can move into the development side where they perform the testing process. This means the certified individual you have a passion for managing the environment, improvises the overall programming structure and can be a DevOps engineer.

Scrum master

The main function of the scrum master is organizing the scrum meeting and solving all the blocker that arises before them. Scrum master requires a little bit of coordination and project managing skills. The scrum master job is similar to business analysts. But the demand is higher among companies. By attaining java certification programs, you have a higher chance to improve your scrum skills.

Project manager

The project manager plays a major role in maintaining the day-to-day projects and must also be capable of managing the six aspects of the projects such as quality, resource, scope, schedule, finance, and risk. The work of the project manager is to budget, plan, oversee, and document all the projects. If you are struggling to handle the projects in the role of project managers then train yourself in a java course where you will get skilled in hook and corner during the course training.

Solution architect

The solution architect's main job is to create one or more applications and services within a company. Typically, the solution architect is part of the solution development team. They need to enhance their skill set in both the business and technical side and often they work as a strategic director for enterprise artifacts. The job of a solution architect is to transform the functional architect work into an architecture solution and they describe their work in architecture and design artifacts. To be a professional solution architect, you need to be well versed in data structure and algorithms as well as in design patterns and system designs.

Business analysts

Business analysts are involved in the work process of the business or IT industry. Business analysts, the main job is to interact with the stakeholders and understand their needs and problems regarding the projects. The analysts gather information and work on the business needs and requirements. If you are new to the field then join in java training where you can elevate your business analyst skills.

Bottom-line

The above reasons show the importance of pursuing the java certification program. If you are looking for IT jobs then start your career by holding standardized java certification. it will take you to a higher position.

[t-baba]

You say JavaScript, I say JS.. let's call the whole thing off?

#495 — July 3, 2020

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👴🏻 Just because I know you're not all as ancient as me, the subject line is a reference to an old Gershwin song 🎵😄

JS Weekly

JavaScript's Creator Recommends We Call JavaScript 'JS' — In response to a lively Twitter thread this week posing the question “If you were given the chance to rename JavaScript, what would you call it?” Brendan Eich wisely suggested, nay declared, we go with JS. While there’s an aspect of fun around this whole debate, it seems a sensible idea given JS has no relation to Java at all, although it might take us a while to rebrand ;-)

Twitter

A Brief Status Update on Vue 3.0 — The 18th beta of Vue 3.0 is out. Amongst other things, they’re targeting mid July for the first release candidate, then early August for the final Vue 3.0 release. You’re encouraged to start using it already though.

Evan You

Locate Front-End Issues Like JavaScript or Network Errors Instantly — Get proactively alerted on any client-side issues such as JavaScript and network errors, optimize the load time of your front-end resources, and detect any UI issues that affect critical user journeys. Try it free with Datadog Synthetics.

Datadog sponsor

▶  What’s New in V8 and JavaScript — A 20-minute talk from this week’s web.dev LIVE event that Google put on. The speakers cover a variety of new features and improvements to JavaScript generally as well as in V8 and Chrome.

Shu-yu Guo and Leszek Swirski (Google)

Announcing TypeScript 4.0 Beta — Last week we said the TS 4 beta was “due any moment” and last thing on a Friday was clearly the time to shine 😂 4.0 has no substantial breaking changes but there are lots of bits and pieces to play with including variadic tuple types, short-circuiting assignment operators, and editor improvements.

Daniel Rosenwasser (Microsoft)

V8 Release V8.4 — The next release of V8 (due to come out in coordinate with Chrome 84) boasts improved startup time, support for weak references and finalizers (worth seeing the code examples for these advanced features), and private methods and accessors.

Camillo Bruni

⚡️ Quick bytes:

Node 14.5 is out and includes a new experimental DOM-esque EventTarget API.

The JS2014 code golfing competition is open until July 15. You have to create something amazing in 1024 bytes (or fewer) of JavaScript.

Take care to not use the Internet Archive as a CDN for your JavaScript assets – obvious, perhaps, but a major British bank seems to have done just that 😄

💻 Jobs

JavaScript Developer at X-Team (Remote) — Join the most energizing community for developers and work on projects for Riot Games, FOX, Sony, Coinbase, and more.

X-Team

Find a Job Through Vettery — Use Vettery to connect with growing tech teams at startups and Fortune 500 companies.

Vettery

📚 Tutorials, Opinions and Stories

Understanding Template Literals — I really like Tania’s tutorials as they are both straightforward and thorough. Template literals are a piece of syntax (introduced in ES6/ES2015) worth understanding if you don’t use them yet.

Tania Rascia

The !! Operator and a Misunderstanding of How JS Handles Truthy / Falsy Values — Ben Nadel has noticed developers using the double-bang (!!) operator far more often in their JavaScript code than they have to. As such, he provides a series of unnecessary examples followed by cleaner, more intuitive examples.

Ben Nadel

CascadiaJS 2020 - An Online Conf for Web Devs That’s Actually Fun 🎉 — More than just a live stream, network and socialize with 1000+ fellow JS devs. Save 20% off with promo code JSWEEKLY.

CascadiaJS sponsor

▶  Low Code for the Node.js Developer with Node-RED — The project lead of Node-RED, a visual, Node-based ‘low code’ programming tool, talks about the concepts of ‘low code’ in the Node space and how Node-RED works.

Nick O Leary (IBM)

▶  The Bits And Bytes of Binary — Do you need to know the ins and outs of messing with binary in order to build a web app? No. But binary nonetheless runs the show at the low level, including in many algorithms, and this series from Low Level JavaScript covers the basics well.

Low Level JavaScript

Tips for Golfing in JavaScript — If you're thinking of entering JS1024 or otherwise want to take pleasure in crushing your JavaScript into as few bytes as possible, this collection of tips and tricks is for you. (Golfing is the art of representing an idea in as little code as possible.)

Stack Exchange

Continuous Deployment of Gatsby Apps to Heroku

CircleCI sponsor

An In-Depth Beginner's Guide to Testing React Apps — A lot of posts will say ‘in-depth’ and be 500 words long – this isn’t one of those! If you’re a beginner to testing, there’s a lot to chew on here but it stays accessible throughout.

Johannes Kettmann

Exploring the Web Speech API — One of those APIs I keep forgetting exists but with which you can do some pretty cool stuff.

James at De Voorhoede

TodoMVC Implemented Using a Game Architecture: ECS — Can you build more traditional GUIs with the Entity Component System as popular in game development? An interesting idea.

Andy Bulka

Getting Started with the Vue 3 Composition API

Joel Parks

🔧 Code & Tools

Vest: Effortless Validations Inspired by Testing Frameworks — If you’re used to unit testing, the syntax used here will be familiar.

Evyatar

React Hook Form 6.0: Simple, Extensible React Form Validation — Now with better TypeScript support, a smaller package size, and numerous refinements and improvements, RHF is certainly worth a look if you’re building or refactoring forms. GitHub repo.

Blue Bill

Stream Chat API & JavaScript SDK for Custom Chat Apps — Build real-time chat in less time. Rapidly ship in-app messaging with our highly reliable chat infrastructure.

Stream sponsor

Hyperapp: (Another) Tiny Framework for Building Web Interfaces — Claims to be 2x faster than React and comes in at less than 2KB.

Jorge Bucaran

Textures.js: SVG Textures for Data Visualization — Built on top of d3.js, this lets you bring together patterns and colors in an elegant and, dare we say, old school manner.

Riccardo Scalco

emoji-picker-element: A Lightweight Emoji Picker for the Modern Web — See a live demo here. Some cool performance advantages for this: It’s a web component and it’s built on Svelte and IndexedDB.

Nolan Lawson

🎨 Creative Corner

24a2: An Ultra-Minimalist Dot Matrix-Based Game Engine — What makes this different is that it has a limited set of features so you can build a game in a few hours. Here’s an example.

James Routley

PHONK: A Creative Scripting Toolbox for Android Devices — If you’ve got any old Android devices sat around, this could be a way to have some fun with them. It’s based around JavaScript.

Victor Diaz

parallax-effect: Parallax Effect in JavaScript using Face Tracking — A lot of designers seem to love parallax effects, whereas a lot of us end users aren’t so keen. But if you’re going to do it, do it in an over the top creative way like this 😂

munrocket

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[udemytutorialfreedownload]

Node JS: Advanced Concepts

Get advanced with Node.Js! Learn caching with Redis, speed up through clustering, and add image upload with S3 and Node!

What Will I Learn?

Absolutely master the Event Loop and understand each of its stages

Utilize Worker Threads and Clustering to dramatically improve the performance of Node servers

Speed up database queries with caching for MongoDB backed by Redis

Add automated browser testing to your Node server, complete with continuous integration pipeline setup

Apply scalable image and file upload to your app, utilizing AWS S3

READ ALSO :

Learn Flutter & Dart to Build iOS & Android Apps [2020]

Blockchain and Bitcoin Fundamentals

Requirements

Basic knowledge of Node, Express, and MongoDB

Strong knowledge of Javascript

Description

Go beyond the basics of Node!  This course will give you the skills needed to become a top Node engineer. Query Caching with Redis? You will learn it.  The Node Event Loop? Included.  Scalable File Upload? Of course! This is a must-take course if you work with Node. Node Internals: Here’s one of the most common interview questions you’ll face when looking for a Node job: “Can you explain the Node’s Event Loop?” There are two types of engineers: those who can describe the Event Loop and those who cannot!  This course will ensure that you are incredibly well prepared to answer that most important question.  Besides being critical for interviews, knowledge of the Event Loop will give you a better understanding of how Node works internally.  Many engineers know not to ‘block’ the Event Loop, but they don’t necessarily understand why.  You will be one of the engineers who can clearly articulate the performance profile of the Node and its Event Loop.

Caching with Redis:

We’ll also supercharge the performance of database queries by implementing caching backed by Redis.  No previous experience with Redis is required!  Redis is an in-memory data store purpose-built for solving caching needs.  By adding caching to your application, you can decrease the amount of time that any given request takes, improving the overall response time of your app.

File Upload:

There are many resources online that offer suggestions on how to handle file upload, but few show a solution that can truly scale.  Hint: saving files directly on your server isn’t a scalable solution!  Learn how to leverage AWS S3 to implement file upload that can scale to millions of users with a few dozen lines of simple code.  Plentiful discussions are included on security concerns with handling uploads, as well.

Continuous Integration Testing:

This is a must-have feature for any serious production app.  We’ll first learn how to test huge swaths of our codebase with just a few lines of code by using Puppeteer and Jest.  After writing many effective tests, we’ll enable continuous integration on Travis CI, a popular – and free – CI platform.  Testing can sometimes be boring, so we’ll use this section to brush up on some advanced Javascript techniques, including one of the only legitimate uses of ES2015 Proxies that you’ll ever see!

Here’s what we’ll learn:

Master the Node Event Loop – understand how Node executes your source code.

Understand the purpose of Node, and how the code you write is eventually executed by C++ code in the V8 engine

Add a huge boost to performance in your Node app through clustering and worker threads

Turbocharge MongoDB queries by adding query caching backed by a lightning-fast Redis instance

Scale your app to infinity with image and file upload backed by Amazon’s S3 file service

Implement a continuous integration testing pipeline so you always know your project functions properly

Think you know everything there is about managing cookies and session?  Well, you might, but learn even more!

Ensure your app works the way you expect with automated browser testing using Jest and Puppeteer

Bonus – learn advanced JS techniques along the way, including where to use ES2015 proxies!

I’ve built the course that I would have wanted to take when I was learning to Node. A course that explains the concepts and how they’re implemented in the best order for you to learn and deeply understand them.

Who is the target audience?

Anyone who wants a deep mastery of Node

Engineers looking to understand the internals of Node

Programmers looking to improve Node’s performance

Created by Stephen Grider Last updated 3/2020 English English [Auto-generated] Size: 1.76 GB

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[evanvanness]

Annotated edition for latest Week in Ethereum News

Original Week in Ethereum News issue that this post provides annotations for.

One thing that surprises me as I’m out talking to people is how many folks bought the NFT but haven’t discovered that I’m now putting out these annotated editions un-paywalled here.  In general, communication in a decentralized ecosystem is difficult, which was a theme of my EthCC talk.

The big news this morning is that an EthLondon/EthCC attendee has tested positive for corona.  Stay safe out there.

Once upon a time I used to do a “top stories” in the weekly newsletter.  Arguably this week the big stories are 1) Baseline Protocol, 2) Semaphore, 3) ProgPoW appears to be dead for now (though of course proponents would disagree), 4) iden3′s zk-rollup on testnet.

Why do these things matter: Baseline matters because increasingly enterprises are realizing that private chains don’t make much sense, but instead using mainnet as a message bus (nod to John Wolpert’s Magic Bus) is the way to go.  EY has done great work with Nightfall allowing privacy in transactions, and this is an extension of that.

Semaphore is similar because it allows devs to build privacy into apps.  

ProgPoW appears to be dead for now since core devs seemed to back away from the idea of a chain split, though I think running it on a testnet makes a lot of sense, just in case.  However it’s not clear under what circumstances the community would come together.

Finally, iden3′s zk-rollup is just about scaling ETH and token transfers so that a few thousand per second can be done.  Layer2 scaling has been hyped for a long time in ETH (and BTC before it) but it’s finally really happening - Loopring’s zk-rollup exchange went live on mainnet last week!

Eth1

Latest core devs call on ProgPoW and EIP1962/curve precompiles. Notes. ProgPoW appears to be dead.

A ProgPoW exploit from Kikx. Kristy’s explanation

Trinity v0.1.0-alpha.35, Beam Sync with better pivots, -goerli flag, ENRs

DHT solution to solve data retrieval problem in stateless Ethereum

What curve precompiles to add is almost as contentious as ProgPoW, but more esoteric than GPU v ASIC, so it doesn’t get as much attention.  We’ve put some precompiles in that didn’t get heavy usage, so trying to figure out the threshold 

Eth2

Latest what’s new in Eth2

Prysmatic client update – big RAM reduction, first slashing success, updated to latest spec

Lighthouse client update – 70% faster block processing, 110 blocks/sec sync, big RAM reduction

zk tooling for an ewasm EE

Combining Ghost and Casper paper proving safety and liveness under various assumptions

Not much to say here, the usual combination of clients doing the heavy lifting to get phase0 into production.  Obviously you should read Ben’s What’s New in Eth2 for more commentary - as is often the case, it is the most clicked link in this week’s newsletter.

Layer2

iden3’s zk-rollup is live on Goerli testnet, ongoing work to reduce the proof generation bottleneck

Stuff for developers

any.sender tutorial – tx relayer that ensures block inclusion by a certain time

Kollateral flash loan pool aggregator, available through JS or Solidity (though unaudited!)

Why ENS had to migrate due to samczsun’s bughunting

Easy multi-contract analysis with Mythril

Fast modular multiplication in Go library

BSol: benchmarking Solidity computation and gas usage

Truffle v5.1.16 – better debugger/decoder with Solc v0.6.3

Understanding event logs

Terminal and IPFS for easy frontend deployment

Argent’s method for easy wallet access, one click transactions, available as npm package

web3connect is now web3modal, still focused on being a web3 solution for all wallets

The usual grab bag.  Interesting to see how many people are building things with flashloans.

Ecosystem

Semaphore: a generic privacy layer using snarks, audited and ready for devs to build on

Zeropool, live on testnet

Questions DeFi users should ask their DeFi apps

Linda Xie’s list of oracles per DeFi project

EthCC videos are already online.

I love how EthCC got their videos online immediately, with same day turnaround.  Getting videos online is a public good - if you organize a conference, you generally feel like you’re done when the conference is over, which is why videos often don’t get online until weeks later.  But the broader community who isn’t at the conference cares the most about videos getting online - and EthCC did that and streamed them live.  Bravo to Jerome, Bettina and the rest of the Ethereum France team.

Enterprise

EY, Microsoft and ConsenSys announce the Baseline Protocol, using mainnet as a message bus for enterprise that is private using snarks

Paul Brody’s Baseline Protocol explainer, based around the enterprise volume procurement prototype

“Morningstar Rates First Ethereum Security In $40 Million Fatburger Deal,” with the deal structurer aiming at doing 500m USD in projects this year on mainnet

The structurer is called Cadence, it will be interesting to see if they hit their 500m goal.  

Governance, DAOs, and standards

An update on EIP1559 – predictable transaction fees and intrinsically tying ETH to the protocol

OracleDAO – a MolochDAO style booster of Augur/REP

0x governance update, progressing toward full decentralization

Some form of 1559 is definitely going to happen, but nailing down the details for a non-minimal change has taken longer than expected.

Application layer

PieDAO, a DeFi asset allocation DAO, where governance tokens vote for allocations with fees accruing to the token

Providing insurance on Opyn to earn premiums from your ETH

Building liquidity into token distribution, highlighting the flexibility of Balancer

Hegic Protocol, on-chain options trading protocol

Golem Hive, PoC of a virtual network of Docker containers on Golem

Unstoppable Domains adds a Chromium-based browser running a local IPFS node

Sell music tracks with Unlock + IPFS + ENS

Instadapp’s DeFi accounts to abstract things away for DeFi users

Messaging and privacy in Status

I like to occasionally check and see how much of what I put in the app layer section is DeFi.  It’s an interesting check on what was released - but of course what everyone counts as DeFi is not obvious when in some sense Ethereum is the value transfer layer that we were promised decades ago for the internet. 

Tokens/Business/Regulation

India’s Supreme Court reverses crypto banking ban

pTokens launch on mainnet, starting with pBTC

Decrypt will launch its own OST token

A few years ago I considered doing a token for Week in Ethereum, so I’m quite curious to see how it goes for Decrypt.

General

Guido Vranken releases his fuzzing engine

Lego Factory: why I’m stewarding the 1 million Eth devs movement

Two Eth2 staking user surveys from Aqeel/Lighthouse and CodeFi

That’s it for my notes this week.  I tried to focus less on saying something for each section and instead try to highlight things for those who pay a little less attention to this space.

Apologies for not getting a chance to do the annotated edition last week during EthCC.

[udemy-gift-coupon-blog]

Node.js & Hapi.js: Building Enterprise Web Apps ##FreeCourse #Apps #Building #Enterprise #Hapijs #Nodejs #Web Node.js & Hapi.js: Building Enterprise Web Apps Hi, welcome to the course!!  Through the 11 chapters of this course, you'll learn What Hapi.js is How to setup a Node.js & Hapi.js server How to validate server input & payloads, then respond with proper error messages & status codes Server composition and configuration for additions & modifications How to serve simple static content & complex static content over HTTP How to simplify your server content using templates & Handlebars How to secure your web application with Basic Authentication and 3rd party Authentication providers like Azure Active Directory (AzureAD) How to connect to, query, insert and update records into a relational database How to monitor your server, output logs, and ship those logs to a centralized repository like Splunk How to easily generate Swagger API documentation How to unit test using Lab & Code How to unit test using Jest How to output code coverage reports So much more! What version of Hapi.js is used in this course? The latest version major version of Hapi.js - 17.x.x Comments? Questions? Suggestions?Leave a question in the QA section of this course! 👉 Activate Udemy Coupon 👈 Free Tutorials Udemy Review Real Discount Udemy Free Courses Udemy Coupon Udemy Francais Coupon Udemy gratuit Coursera and Edx ELearningFree Course Free Online Training Udemy Udemy Free Coupons Udemy Free Discount Coupons Udemy Online Course Udemy Online Training 100% FREE Udemy Discount Coupons https://www.couponudemy.com/blog/node-js-hapi-js-building-enterprise-web-apps/

[supermayankfan-blog]

Below are few Node JS MCQ test that checks your basic knowledge of Node JS Framework. This Node JS Test contains around 29 questions of multiple choice type with 4 options. You have to select the right answer to a question. You can see the correct answer by clicking view answer link.

[getaprogrammer7]

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Antiviren

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Antiviren

Ergebnisse der Google Suche zu „Antiviren“

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9 Tips For Landing Your First Digital Marketing Job

Digital Marketing- The newest trend in the job market.

In these competitive times in the job market, digital marketing seems to be a glorious option for career enhancement for many, especially for the students. Digital marketing has recently been in a lot of discussions worldwide. It is considered to be the new pathway for business organizations that will blossom your business comprehensively.

In recent times everything we can think of is online. So taking business and marketing to the web is the most tactical way which can be proved to be profitable in many ways. The major key to digital marketing is social media marketing. You can target your desired clients by advertising your brand through social media platforms. It's a huge evolution of marketing strategies. And over the years it has been proved to be beneficiary for a number of businesses. The most important benefit of it is that even you are new to the business industry you can pull through a lot of strings for your brand by advertising it online

The scope of digital marketing for career opportunities:

Now here the question may arise what really is the future of digital marketing? Are we at a saturation point? The answer to this is pretty simple how we can beat a saturation point when we all know that our time to raise is heavily invested in digital. We consume more on digital than in the real world. In India, there are about 500 million internet users. Similarly, in any other country, there is an increase in usage of the internet and this is growing with a very rapid speed. But campaigns like Digital India and Jio internet services, digital has reached out to the rural and urban areas at a faster pace in the last two years. All together its 22 percent growth in usage of internet in rural India and about 7 percent in urban. Remember 55 percent of Indians haven't used the internet yet. As they start adapting to the internet the processes will become more digital and there would be increasing demand for digital marketer.

Job Openings in Digital Marketing filed:

There have been thousands for job openings in digital marketing and this is with respect to the keyword digital marketing itself. If you look at SEO, SEM there is a lot of potential job openings up there on these platforms. If you search for social media or SEO you can find a lot more openings up there. Let's take two references:

Naukri.com has about 13,000 job openings in the digital marketing domain.

LinkedIn has close to about 5,000 job openings in digital marketing.

Read more: 9 Highest Paid Digital Marketing Skills in Demand [You Can't-Miss it]

Landing your first digital marketing job

Knowing what aspect of digital marketing you need to learn and evaluate your skills accordingly.

Look for potential job fields, which includes SEO, SEM. These fields have a lot of potential job openings.

Look for the potential platforms that are offering a huge amount of openings. For instance, naukri.com, LinkedIn, etc.

Now before starting with your job you first need to evaluate which field of digital marketing you are most suited, then go for that field. The specific fields are mentioned below int consecutive points.

Process Oriented: If you think you are not a creative person and not creative genie, the industry still demands people who can drive great leads advertisements. You can definitely opt for a process-oriented digital field. This is the field where you need to do SEO, SEM, Google Analytics, Automation, Digital advertising and tasks that don't require great content synergy.

Creative Content Oriented: If you are a creative person or you love to visualize, then this role suits you the best. Your role demands you to come up with content strategy, campaign ideas, unique Hashtag proposition, creative for digital advertisements, etc.

Management Oriented: People who have been in the marketing industry for years and want to make a career shift in digital and would like to get into a mid-manager role or managerial role in the domain of digital like client service head, account manager, etc. can opt for this field. Even this field can be taken up by students if they are interested in marketing fields.

Technology Oriented: These are those silent guys in the digital domain who are responsible for doing some APIs and so some tech-based marketing innovations. They are coders, API developers, etc. so if you are into coding and developing this field is your option to go with.

Figure out which field of digital marketing is most suited for you and choose accordingly before looking for a job.

Certification in digital marketing is that the most trending buzz happening within the market. Employers of high international companies are searching for certified professionals and they say- certification is that the key to getting employed. the number says 90th of hiring managers consider certification as prime hiring criteria.

To get skilled in an advanced digital marketing course, So many institutes offer inclusive Digital Marketing Course in Jaipur for graduates, business owners, and etc., over theory, it's offering practical session and tools training by industry specialists. At the side of internet marketing training, the institute helps its students to get placed in top MNCs by giving 100% job placement assistance, training material, and digital marketing certification.

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Migrate Single MySQL Enterprise Database into Three Node MySQL Enterprise InnoDB Cluster with latest version 8.0.20

How to Migrate Single MySQL Enterprise Server to Three Node MySQL Enterprise  InnoDB Cluster latest version 8.0.20 ? Assume current you production work loads resembles multiple app server and all are point to single MySQL Server.  have you thought about below questions ? 1. what if , this database goes down ? this is single point of failure ? 2. what if, data loss ? 3. Scalability ? 4. Data Inconsistencies ? 5. DR? BTW, i am using MySQL Enterprise Edition ,  more info:-  https://www.mysql.com/products/enterprise/ To address these basic questions on SLA , RPO/RTO ,  MySQL has another high availability solutions which is developed by MySQL Engg team, which has no noisy neighbors all components are tested by MySQL Engg team. MySQL InnoDB Cluster= MySQL Server + MySQL Shell + MySQL Router In This Blog , I will Talk about below topic:- 1. Introduction about MySQL InnoDB Cluster 2. New features in MySQL 8.0.20 related to InnoDB CLuster. 3. High Level Migration from one server to 03 server MySQL InnoDB Cluster. 4.Step by step Guide 5. Conclusion High lights about MySQL InnoDB CLuster can be found here:- https://dev.mysql.com/doc/refman/8.0/en/mysql-innodb-cluster-production-deployment.html In case which cluster solutions is suitable for your application workloads can be found here:- https://mysqlsolutionsarchitect.blogspot.com/2020/05/which-cluster-is-suitable-for-your.html Pain to Solutions Architecture Let’s Deploy Single Production MySQL Server to 03 Node MySQL InnoDB Cluster. Prerequisite:- ü About Software 1.       MySQL Server è  MySQL Server has to be running on all three machine, with same versions. mysql> select @@version 2.       MySQL Shell è  MySQL Shell has to be installed and running in all three machine, (below are installation steps) 3.       MySQL Router è  This software has to be install where app is running) ü  Qualification of database, whether production DB is right to deploy or not? ü   Each Table Must have InnoDB Storage Engine . ü  each table must have Primary key)  https://dev.mysql.com/doc/refman/8.0/en/mysql-innodb-cluster-requirements.html  https://dev.mysql.com/doc/refman/8.0/en/group-replication-limitations.html Assume:- You have one Production Machine , 02 new Machine.In This demo :- 192.168.0.10 --> production database.                          192.168.0.9 , 192.168.0.11 are New machine Machine Role 192.168.0.10 Primary 192.168.0.9 Secondary 192.168.0.11 Secondary Primary Machine has two database running. mysql> SELECT table_schema "DB Name", ROUND(SUM(data_length + index_length) / 1024 / 1024, 1) "DB Size in MB"  FROM information_schema.tables  where table_schema not in ('mysql','information_schema','performance_schema','sys') group by table_schema; +------------+---------------+ | DB Name    | DB Size in MB | +------------+---------------+ | customerDB |        1899.5 | | sales      |           0.0 | +------------+---------------+ 2 rows in set (0.07 sec) You can see i have one machine with 1.89 GB of MySQL Database, through which idea is to form new InnoDB Cluster with additional 02 server required where nothing is installed!!! Secondary Server has nothing installed ,fresh machine. So let install MySQL Server & MySQL Shell in both secondary Server. MySQL Router is not needed to install on database machine , instead you install it in Application Server or else Primary Server. Install MySQL Server https://dev.mysql.com/doc/refman/8.0/en/linux-installation-yum-repo.html Install MySQL Shell https://dev.mysql.com/doc/mysql-shell/8.0/en/mysql-shell-install-linux-quick.html         Once we are done with cluster set up>> below output has to come than we can say that our InnoDB Cluster is successfully deployed MySQL JS> cluster.status() {     "clusterName": "myCluster",     "defaultReplicaSet": {         "name": "default",         "primary": "192.168.0.10:3306",         "ssl": "REQUIRED",         "status": "OK",         "statusText": "Cluster is ONLINE and can tolerate up to ONE failure.",         "topology": {             "192.168.0.10:3306": {                 "address": "192.168.0.10:3306",                 "mode": "R/W",                 "readReplicas": {},                 "replicationLag": null,                 "role": "HA",                 "status": "ONLINE",                 "version": "8.0.20"             },             "192.168.0.11:3306": {                 "address": "192.168.0.11:3306",                 "mode": "R/O",                 "readReplicas": {},                 "replicationLag": null,                 "role": "HA",                 "status": "ONLINE",                 "version": "8.0.20"             },             "192.168.0.9:3306": {                 "address": "192.168.0.9:3306",                 "mode": "R/O",                 "readReplicas": {},                 "replicationLag": null,                 "role": "HA",                 "status": "ONLINE",                 "version": "8.0.20"             }         },         "topologyMode": "Single-Primary"     },     "groupInformationSourceMember": "192.168.0.10:3306" }    Let's get Started (Step by Step guide) MySQL Configuration Check  [1.]#configure the report_host variable in the MySQL configuration of each instance to a suitable externally reachable address mysql> show variables like '%report_host%'; +---------------+--------------+ | Variable_name | Value        | +---------------+--------------+ | report_host   | 192.168.0.10 | +---------------+--------------+ 1 row in set (0.00 sec)   mysql>   Make Sure  result should not EMPTY o/w , go to my.cnf fileà keep à report_host='' à saveà restart mysqld   Do this to all MySQL Server machine.   [2.]#Ensure that none of the MySQL instances have any executed GTIDs: mysql> SELECT @@global.gtid_executed; +------------------------+ | @@global.gtid_executed | +------------------------+ |                        | +------------------------+ 1 row in set (0.00 sec) If the query returns anything like below, reset the master: mysql> SELECT @@global.gtid_executed; +----------------------------------------+ | @@global.gtid_executed                 | +----------------------------------------+ | 88a2732s-2373-11e7-7ce3-080027d1eed8:2 | +----------------------------------------+ 1 row in set (0.00 sec)   mysql> RESET MASTER; Query OK, 0 rows affected (0.06 sec)   mysql> SELECT @@global.gtid_executed; +------------------------+ | @@global.gtid_executed | +------------------------+ |                        | +------------------------+ 1 row in set (0.00 sec) Important: The RESET MASTER statement will delete all binary logs. This example assumes there is no binary logs that must be kept and that all instances have just been set up from scratch.   #SQL_mode (for Demo Purposes) set global sql_mode='STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION';   [3.]#Make sure Database has primary Key   SELECT a.table_name FROM INFORMATION_SCHEMA.TABLES as a LEFT JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS b ON (a.TABLE_NAME = b.TABLE_NAME AND b.CONSTRAINT_SCHEMA = a.TABLE_SCHEMA AND b.constraint_name = 'PRIMARY' ) WHERE a.table_schema <> 'information_schema' AND a.table_schema <> 'performance_schema' AND a.table_schema <> 'mysql' and a.table_schema <> 'sys'  AND b.constraint_name IS NULL;   Let’s Get Started   login mysql shell with user root MySQL  192.168.0.10:3306 ssl  JS > checkInstanceConfiguration('root@192.168.0.10:3306') #mysqlsh root@192.168.0.10:3306   Creating a session to 'root@192.168.0.10:3306' Please provide the password for 'root@192.168.0.10:3306': ******** Save password for 'root@192.168.0.10:3306'? [Y]es/[N]o/Ne[v]er (default No): Y . . . MySQL  192.168.0.10:3306 ssl  JS >   MySQL JS > dba.checkInstanceConfiguration('root@192.168.0.10:3306') Validating local MySQL instance listening at port 3306 for use in an InnoDB cluster...   This instance reports its own address as 192.168.0.10:3306   Checking whether existing tables comply with Group Replication requirements... WARNING: The following tables do not have a Primary Key or equivalent column: customerDB.salesaccount, customerDB.salesdetails, customerDB.usermgmt   Group Replication requires tables to use InnoDB and have a PRIMARY KEY or PRIMARY KEY Equivalent (non-null unique key). Tables that do not follow these requirements will be readable but not updateable when used with Group Replication. If your applications make updates (INSERT, UPDATE or DELETE) to these tables, ensure they use the InnoDB storage engine and have a PRIMARY KEY or PRIMARY KEY Equivalent.   Checking instance configuration...   NOTE: Some configuration options need to be fixed: +--------------------------+---------------+----------------+--------------------------------------------------+ | Variable                 | Current Value | Required Value | Note                                             | +--------------------------+---------------+----------------+--------------------------------------------------+ | binlog_checksum          | CRC32         | NONE           | Update the server variable                       | | enforce_gtid_consistency | OFF           | ON             | Update read-only variable and restart the server | | gtid_mode                | OFF           | ON             | Update read-only variable and restart the server | | server_id                | 1             |     | Update read-only variable and restart the server | +--------------------------+---------------+----------------+--------------------------------------------------+   Some variables need to be changed, but cannot be done dynamically on the server. NOTE: Please use the dba.configureInstance() command to repair these issues.   {     "config_errors": [         {             "action": "server_update",             "current": "CRC32",             "option": "binlog_checksum",             "required": "NONE"         },         {             "action": "server_update+restart",             "current": "OFF",             "option": "enforce_gtid_consistency",             "required": "ON"         },         {             "action": "server_update+restart",             "current": "OFF",             "option": "gtid_mode",             "required": "ON"         },         {             "action": "server_update+restart",             "current": "1",             "option": "server_id",             "required": ""         }     ],     "status": "error" }   #Our First Task is to ALTER TABLE and add primary key to required table.   mysql> ALTER TABLE usermgmt  ADD PRIMARY KEY(userid); ALTER TABLE salesaccount  ADD PRIMARY KEY(salesid); ALTER TABLE salesdetails  ADD PRIMARY KEY(salesid); Let’s Re-check the Instance     MySQL JS > dba.checkInstanceConfiguration('root@192.168.0.10:3306') MySQL  192.168.0.10:3306 ssl  JS > dba.checkInstanceConfiguration('root@192.168.0.10:3306') Validating local MySQL instance listening at port 3306 for use in an InnoDB cluster...   This instance reports its own address as 192.168.0.10:3306   Checking whether existing tables comply with Group Replication requirements... No incompatible tables detected   Checking instance configuration...   NOTE: Some configuration options need to be fixed: +--------------------------+---------------+----------------+--------------------------------------------------+ | Variable                 | Current Value | Required Value | Note                                             | +--------------------------+---------------+----------------+--------------------------------------------------+ | binlog_checksum          | CRC32         | NONE           | Update the server variable                       | | enforce_gtid_consistency | OFF           | ON             | Update read-only variable and restart the server | | gtid_mode                | OFF           | ON             | Update read-only variable and restart the server | | server_id                | 1             |     | Update read-only variable and restart the server | +--------------------------+---------------+----------------+--------------------------------------------------+   Some variables need to be changed, but cannot be done dynamically on the server. NOTE: Please use the dba.configureInstance() command to repair these issues.   {     "config_errors": [         {             "action": "server_update",             "current": "CRC32",             "option": "binlog_checksum",             "required": "NONE"         },         {             "action": "server_update+restart",             "current": "OFF",             "option": "enforce_gtid_consistency",             "required": "ON"         },         {             "action": "server_update+restart",             "current": "OFF",             "option": "gtid_mode",             "required": "ON"         },         {             "action": "server_update+restart",             "current": "1",             "option": "server_id",             "required": ""         }     ],     "status": "error" } MySQL  192.168.0.10:3306 ssl  JS >   Above Output shows there is no primary key issue, But  “Some configuration options need to be fixed:”“) Now Next…   MySQL  192.168.0.10:3306 ssl  JS >dba.configureInstance('root@192.168.0.10:3306')   MySQL  192.168.0.10:3306 ssl  JS > dba.configureInstance('root@192.168.0.10:3306') Configuring local MySQL instance listening at port 3306 for use in an InnoDB cluster...   This instance reports its own address as 192.168.0.10:3306   NOTE: Some configuration options need to be fixed: +--------------------------+---------------+----------------+--------------------------------------------------+ | Variable                 | Current Value | Required Value | Note                                             | +--------------------------+---------------+----------------+--------------------------------------------------+ | binlog_checksum          | CRC32         | NONE           | Update the server variable                       | | enforce_gtid_consistency | OFF           | ON             | Update read-only variable and restart the server | | gtid_mode                | OFF           | ON             | Update read-only variable and restart the server | | server_id                | 1             |     | Update read-only variable and restart the server | +--------------------------+---------------+----------------+--------------------------------------------------+   Some variables need to be changed, but cannot be done dynamically on the server. Do you want to perform the required configuration changes? [y/n]: y Do you want to restart the instance after configuring it? [y/n]: y Configuring instance... The instance '192.168.0.10:3306' was configured to be used in an InnoDB cluster. Restarting MySQL... NOTE: MySQL server at 192.168.0.10:3306 was restarted.   Repeat The Same Process in Machine 02 & Machine 03 On Machine 02 MySQL  192.168.0.11:3306 ssl  JS >  dba.checkInstanceConfiguration('root@192.168.0.11:3306') MySQL  192.168.0.10:3306 ssl  JS > dba.checkInstanceConfiguration('root@192.168.0.11:3306') Please provide the password for 'root@192.168.0.11:3306': ******** Save password for 'root@192.168.0.11:3306'? [Y]es/[N]o/Ne[v]er (default No): Y Validating MySQL instance at 192.168.0.11:3306 for use in an InnoDB cluster...   This instance reports its own address as 192.168.0.11:3306   Checking whether existing tables comply with Group Replication requirements... No incompatible tables detected   Checking instance configuration...   NOTE: Some configuration options need to be fixed: +--------------------------+---------------+----------------+--------------------------------------------------+ | Variable                 | Current Value | Required Value | Note                                             | +--------------------------+---------------+----------------+--------------------------------------------------+ | binlog_checksum          | CRC32         | NONE           | Update the server variable                       | | enforce_gtid_consistency | OFF           | ON             | Update read-only variable and restart the server | | gtid_mode                | OFF           | ON             | Update read-only variable and restart the server | | server_id                | 1             |     | Update read-only variable and restart the server | +--------------------------+---------------+----------------+--------------------------------------------------+   Some variables need to be changed, but cannot be done dynamically on the server. NOTE: Please use the dba.configureInstance() command to repair these issues.   {     "config_errors": [         {             "action": "server_update",             "current": "CRC32",             "option": "binlog_checksum",             "required": "NONE"         },         {             "action": "server_update+restart",             "current": "OFF",             "option": "enforce_gtid_consistency",             "required": "ON"         },         {             "action": "server_update+restart",             "current": "OFF",             "option": "gtid_mode",             "required": "ON"         },         {             "action": "server_update+restart",             "current": "1",             "option": "server_id",             "required": ""         }     ],     "status": "error" }  MySQL  192.168.0.10:3306 ssl  JS > MySQL  192.168.0.10:3306 ssl  JS > dba.checkInstanceConfiguration('root@192.168.0.11:3306') Validating MySQL instance at 192.168.0.11:3306 for use in an InnoDB cluster...   This instance reports its own address as 192.168.0.11:3306   Checking whether existing tables comply with Group Replication requirements... No incompatible tables detected   Checking instance configuration... Instance configuration is compatible with InnoDB cluster   The instance '192.168.0.11:3306' is valid to be used in an InnoDB cluster.   {     "status": "ok" } MySQL  192.168.0.10:3306 ssl  JS > On Machine 03   MySQL  192.168.0.10:3306 ssl  JS > dba.checkInstanceConfiguration('root@192.168.0.9:3306') MySQL  192.168.0.10:3306 ssl  JS > dba.checkInstanceConfiguration('root@192.168.0.9:3306') Please provide the password for 'root@192.168.0.9:3306': ******** Save password for 'root@192.168.0.9:3306'? [Y]es/[N]o/Ne[v]er (default No): Y Validating MySQL instance at 192.168.0.9:3306 for use in an InnoDB cluster...   This instance reports its own address as 192.168.0.9:3306   Checking whether existing tables comply with Group Replication requirements... No incompatible tables detected   Checking instance configuration...   NOTE: Some configuration options need to be fixed: +--------------------------+---------------+----------------+--------------------------------------------------+ | Variable                 | Current Value | Required Value | Note                                             | +--------------------------+---------------+----------------+--------------------------------------------------+ | binlog_checksum          | CRC32         | NONE           | Update the server variable                       | | enforce_gtid_consistency | OFF           | ON             | Update read-only variable and restart the server | | gtid_mode                | OFF           | ON             | Update read-only variable and restart the server | | server_id                | 1             |     | Update read-only variable and restart the server | +--------------------------+---------------+----------------+--------------------------------------------------+   Some variables need to be changed, but cannot be done dynamically on the server. NOTE: Please use the dba.configureInstance() command to repair these issues.   {     "config_errors": [         {             "action": "server_update",             "current": "CRC32",             "option": "binlog_checksum",             "required": "NONE"         },         {             "action": "server_update+restart",             "current": "OFF",             "option": "enforce_gtid_consistency",             "required": "ON"         },         {             "action": "server_update+restart",             "current": "OFF",             "option": "gtid_mode",             "required": "ON"         },         {             "action": "server_update+restart",             "current": "1",             "option": "server_id",             "required": ""         }     ],     "status": "error" }     MySQL  192.168.0.10:3306 ssl  JS > dba.configureInstance('root@192.168.0.9:3306')   Configuring MySQL instance at 192.168.0.9:3306 for use in an InnoDB cluster...   This instance reports its own address as 192.168.0.9:3306   NOTE: Some configuration options need to be fixed: +--------------------------+---------------+----------------+--------------------------------------------------+ | Variable                 | Current Value | Required Value | Note                                             | +--------------------------+---------------+----------------+--------------------------------------------------+ | binlog_checksum          | CRC32         | NONE           | Update the server variable                       | | enforce_gtid_consistency | OFF           | ON             | Update read-only variable and restart the server | | gtid_mode                | OFF           | ON             | Update read-only variable and restart the server | | server_id                | 1             |     | Update read-only variable and restart the server | +--------------------------+---------------+----------------+--------------------------------------------------+   Some variables need to be changed, but cannot be done dynamically on the server. Do you want to perform the required configuration changes? [y/n]: y Do you want to restart the instance after configuring it? [y/n]: y Configuring instance... The instance '192.168.0.9:3306' was configured to be used in an InnoDB cluster. Restarting MySQL... NOTE: MySQL server at 192.168.0.9:3306 was restarted.  MySQL  192.168.0.10:3306 ssl  JS >   MySQL  192.168.0.9:3306 ssl  JS > dba.checkInstanceConfiguration('root@192.168.0.9:3306')   MySQL  192.168.0.10:3306 ssl  JS > dba.checkInstanceConfiguration('root@192.168.0.9:3306') Validating MySQL instance at 192.168.0.9:3306 for use in an InnoDB cluster...   This instance reports its own address as 192.168.0.9:3306   Checking whether existing tables comply with Group Replication requirements... No incompatible tables detected   Checking instance configuration... Instance configuration is compatible with InnoDB cluster   The instance '192.168.0.9:3306' is valid to be used in an InnoDB cluster.   {     "status": "ok" } MySQL  192.168.0.10:3306 ssl  JS >     #Let’s Create Cluster #Connect to Primary Node ##Uninstall validate_password mysql>UNINSTALL COMPONENT 'file://component_validate_password'; MySQL JS> var clusterr= dba.createCluster("myCluster") A new InnoDB cluster will be created on instance '192.168.0.10:3306'.   Validating instance configuration at 192.168.0.10:3306...   This instance reports its own address as 192.168.0.10:3306   Instance configuration is suitable. NOTE: Group Replication will communicate with other members using '192.168.0.10:33061'. Use the localAddress option to override.   Creating InnoDB cluster 'myCluster' on '192.168.0.10:3306'...   Adding Seed Instance... Cluster successfully created. Use Cluster.addInstance() to add MySQL instances. At least 3 instances are needed for the cluster to be able to withstand up to one server failure.   MySQL  192.168.0.10:3306 ssl  JS >   MySQL  192.168.0.10:3306 ssl  JS > clusterr.setupAdminAccount("ICAdmin")   # Re-Connect mysql shell with new users “ICAdmin” and do the cluster management/setup     MySQL  JS > c ICAdmin@192.168.0.10:3306     MySQL  192.168.0.10:3306 ssl  JS > var clusterr = dba.getCluster()   MySQL  192.168.0.10:3306 ssl  JS > clusterr.addInstance("root@192.168.0.9:3306"); NOTE: A GTID set check of the MySQL instance at '192.168.0.9:3306' determined that it is missing transactions that were purged from all cluster members.   * Waiting for clone to finish... NOTE: 192.168.0.9:3306 is being cloned from 192.168.0.10:3306 ** Stage DROP DATA: Completed ** Clone Transfer     FILE COPY  ############################################################  100%  Completed     PAGE COPY  ############################################################  100%  Completed     REDO COPY  ############################################################  100%  Completed ** Stage RECOVERY: NOTE: 192.168.0.9:3306 is shutting down...   * Waiting for server restart... ready * 192.168.0.9:3306 has restarted, waiting for clone to finish... * Clone process has finished: 2.69 GB transferred in 1 min 2 sec (43.35 MB/s)   State recovery already finished for '192.168.0.9:3306'   The instance '192.168.0.9:3306' was successfully added to the cluster.   MySQL  192.168.0.10:3306 ssl  JS > MySQL  192.168.0.10:3306 ssl  JS > cluster.addInstance("root@192.168.0.6:3306")   Please select a recovery method [C]lone/[I]ncremental recovery/[A]bort (default Clone): C NOTE: Group Replication will communicate with other members using '192.168.0.6:33061'. Use the localAddress option to override.   Validating instance configuration at 192.168.0.6:3306...   This instance reports its own address as 192.168.0.6:3306   * Waiting for clone to finish... NOTE: 192.168.0.6:3306 is being cloned from 192.168.0.10:3306 ** Stage DROP DATA: Completed ** Clone Transfer     FILE COPY  ############################################################  100%  Completed     PAGE COPY  ############################################################  100%  Completed     REDO COPY  ############################################################  100%  Completed   NOTE: 192.168.0.6:3306 is shutting down...   * Waiting for server restart... ready * 192.168.0.6:3306 has restarted, waiting for clone to finish... ** Stage RESTART: Completed * Clone process has finished: 2.72 GB transferred in 21 sec (129.72 MB/s)   State recovery already finished for '192.168.0.6:3306'   The instance '192.168.0.6:3306' was successfully added to the cluster.   MySQL  192.168.0.10:3306 ssl  JS >   #Add Another Instance Make sure report_host is not empty when you execute this command:- show variables like ‘%report_host%’;MySQL  192.168.0.10:3306 ssl  JS >clusterr.addInstance("root@192.168.0.11:3306"); MySQL  192.168.0.10:3306 ssl  JS > clusterr.addInstance("root@192.168.0.11:3306"); NOTE: A GTID set check of the MySQL instance at '192.168.0.11:3306' determined that it is missing transactions that were purged from all cluster members.   Please select a recovery method [C]lone/[A]bort (default Abort): C NOTE: Group Replication will communicate with other members using '192.168.0.11:33061'. Use the localAddress option to override.   Validating instance configuration at 192.168.0.11:3306...    * Waiting for clone to finish... NOTE: 192.168.0.11:3306 is being cloned from 192.168.0.10:3306 ** Stage DROP DATA: Completed ** Clone Transfer     FILE COPY  ############################################################  100%  Completed     PAGE COPY  ############################################################  100%  Completed     REDO COPY  ############################################################  100%  Completed   NOTE: 192.168.0.11:3306 is shutting down...   * Waiting for server restart... ready * 192.168.0.11:3306 has restarted, waiting for clone to finish... ** Stage RESTART: Completed * Clone process has finished: 2.69 GB transferred in 23 sec (116.86 MB/s)   State recovery already finished for '192.168.0.11:3306' The instance '192.168.0.11:3306' was successfully added to the cluster.     MySQL  192.168.0.10:3306 ssl  JS > clusterr.status()    MySQL  192.168.0.10:3306 ssl  JS > clusterr.status() {     "clusterName": "myCluster",     "defaultReplicaSet": {         "name": "default",         "primary": "192.168.0.10:3306",         "ssl": "REQUIRED",         "status": "OK",         "statusText": "Cluster is ONLINE and can tolerate up to ONE failure.",         "topology": {             "192.168.0.10:3306": {                 "address": "192.168.0.10:3306",                 "mode": "R/W",                 "readReplicas": {},                 "replicationLag": null,                 "role": "HA",                 "status": "ONLINE",                 "version": "8.0.20"             },             "192.168.0.11:3306": {                 "address": "192.168.0.11:3306",                 "mode": "R/O",                 "readReplicas": {},                 "replicationLag": null,                 "role": "HA",                 "status": "ONLINE",                 "version": "8.0.20"             },             "192.168.0.9:3306": {                 "address": "192.168.0.9:3306",                 "mode": "R/O",                 "readReplicas": {},                 "replicationLag": null,                 "role": "HA",                 "status": "ONLINE",                 "version": "8.0.20"             }         },         "topologyMode": "Single-Primary"     },     "groupInformationSourceMember": "192.168.0.10:3306" } MySQL  192.168.0.10:3306 ssl  JS >     Congratulations!!! , Finally Our Cluster is Ready.     ###In case if you want to Install  validate_password. INSTALL COMPONENT 'file://component_validate_password';    Setup Router for automatic startup clusterr.setupRouterAccount("RouterAdmin"); MySQL  192.168.0.10:3306 ssl  JS > clusterr.setupRouterAccount("RouterAdmin"); Missing the password for new account RouterAdmin@%. Please provide one. Password for new account: ******** Confirm password: ******** Creating user RouterAdmin@%. Setting user password. Account RouterAdmin@% was successfully created.  MySQL  192.168.0.10:3306 ssl  JS > // Exit mysqlsh and bootstrap the Router using the newly created Router admin account sudo mkdir -p /opt/mysql/router #chown -R mysql:mysql /opt/mysql/router [root@192.168.0.10  ~]# mysqlrouter --force --bootstrap ICAdmin@192.168.0.10:3306 --directory=/opt/mysql/router --user=root Please enter MySQL password for ICAdmin: # Bootstrapping MySQL Router instance at '/opt/mysql/router'... - Creating account(s) (only those that are needed, if any) - Verifying account (using it to run SQL queries that would be run by Router) - Storing account in keyring - Adjusting permissions of generated files - Creating configuration /opt/mysql/router/mysqlrouter.conf # MySQL Router configured for the InnoDB Cluster 'myCluster' After this MySQL Router has been started with the generated configuration     $ mysqlrouter -c /opt/mysql/router/mysqlrouter.conf the cluster 'myCluster' can be reached by connecting to: ## MySQL Classic protocol - Read/Write Connections: localhost:6446 - Read/Only Connections:  localhost:6447 ## MySQL X protocol - Read/Write Connections: localhost:64460 - Read/Only Connections:  localhost:64470 //Start Router /opt/mysql/router/start.sh [root@192.168.0.10  ~]# mysql -uroot -pMySQL8.0 -P6446 -h192.168.0.10 -e "select @@hostname" [root@192.168.0.10  ~]# mysql -uroot -pMySQL8.0 -P6446 -h192.168.0.10 -e "select @@hostname" mysql: [Warning] Using a password on the command line interface can be insecure. +-------------+ | @@hostname  | +-------------+ | Workshop-10 | +-------------+ [root@192.168.0.10  ~]# [root@192.168.0.6  ~]# service mysqld stop Redirecting to /bin/systemctl stop mysqld.service [root@192.168.0.10  ~]# mysql -uroot -pMySQL8.0 -P6446 -h192.168.0.6 -e "select @@hostname" [root@192.168.0.10  ~]# mysql -uroot -pMySQL8.0 -P6446 -h192.168.0.10 -e "select @@hostname" mysql: [Warning] Using a password on the command line interface can be insecure. +------------+ | @@hostname | +------------+ | Workshop-9 | +------------+ [root@192.168.0.10  ~]# //Using InnoDB Cluster mysqlsh MySQL JS>shell.connect("root@192.168.0.10:6446"); sql SQL>SELECT * FROM performance_schema.replication_group_members; MySQL  192.168.0.10:6446 ssl  SQL > SELECT * FROM performance_schema.replication_group_members; +---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+ | CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST  | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | +---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+ | group_replication_applier | 52e4d23f-ae41-11ea-b284-080027764fed | 192.168.0.9  |        3306 | ONLINE       | PRIMARY     | 8.0.20         | | group_replication_applier | aca28337-ae41-11ea-8970-0800275d8765 | 192.168.0.11 |        3306 | ONLINE       | SECONDARY   | 8.0.20         | | group_replication_applier | ccffb1c5-ae40-11ea-87b5-080027528934 | 192.168.0.10 |        3306 | RECOVERING   | SECONDARY   | 8.0.20         | +---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+ 3 rows in set (0.0008 sec) CREATE DATABASE sales;USE sales; CREATE TABLE if not exists sales.employee(empid int primary key,empname varchar(100),salary int,deptid int); INSERT sales.employee values(100,'Ram',1000,10); INSERT sales.employee values(200,'Raja',2000,10); INSERT sales.employee values(300,'Sita',3000,20); SELECT * FROM  sales.employee; ---------------------***********************@@@@@@@@FINISHED@@@@@@@@**********_______ Conclusion:- MySQL InnoDB cluster provides a complete high availability solution for MySQL. MySQL Shell includes AdminAPI which enables you to easily configure and administer a group of at least three MySQL server instances to function as an InnoDB cluster.  Each MySQL server instance runs MySQL Group Replication, which provides the mechanism to replicate data within InnoDB clusters, with built-in failover.  In the event of an unexpected failure of a server instance the cluster reconfigures automatically.            In the default single-primary mode, an InnoDB cluster has a single read-write server instance - the primary. Multiple secondary server instances are replicas of the primary. If the primary fails, a secondary is automatically promoted to the role of primary.  MySQL Router detects this and forwards client applications to the new primary. Advanced users can also configure a cluster to have multiple-primaries. ===================Thank You for Using MySQL!!!================== Feel free to share your feedback & recommendations. https://mysqlsolutionsarchitect.blogspot.com/2020/06/migrate-single-mysql-enterprise-server_8.html

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Magento PWA Studio Tutorial: Step by Step to Get Maximum Customers

Are you familiar with Magento PWA Studio Tutorial?

Or do you even know what PWA is?

This article will answer all related questions.

If you are looking for a way to leverage your online store, create a much better mobile experience on your website, you cannot overlook this blog.

In this blog, we will provide:

A clear overview of Progressive Web Application (PWA) in general and its benefits

An introduction to Magento PWA Studio Project

Basic concepts of Magento PWA

Magento PWA Studio Tutorial

Now, let’s get started!

What Is Progressive Web Application?

>>> Read Later: How to Optimize Magento 2 Order Management?

Progressive Web Application (PWA in short) is simply a web application applying modern web technologies to bring about a reliable, fast, and engaging customer experience.

Also, PWA can perform like a native app on smartphones. Therefore, it is extremely useful when customers tend to shop online by using phones, especially using available applications.

PWA’s Benefits

As PWA applies advanced web technologies, many online stores nowadays develop their web applications to attract more engaged customers:

Fast: Various performance optimization techniques are applied to improve the fast-loading functionality.

Mobile-friendly: As PWA is designed for smartphones, it is clear that those applications are fit in any size of any device.

Security & Reliable: PWA sites use HTTPS connections to improve security.

Installable: It is more convenient for customers to install the apps and access an online store with just one click.

Offline usable: As the apps are installed on mobile devices, customers can use it even when it is not connected to the Internet. All the actions will be updated as soon as the Internet is available.

Shareable: In any application, there is a button that enables you to share the content on social media with one click.

Easily keep customers engaged: The comfortability of PWA sites can make customers stay longer in your store. Also, the feature of sending notifications directly to their phones can keep them updated as well.

PWA Basic Concepts

>>> Have A Look Here: Magento Sample Data – Install, Update, Remove Guide (2020 Updated)!

Before going in-depth with the tutorial, let’s look over these following basic concepts and make sure that you understand it well to work with PWA tools.

Application Shell

An application shell provides a fundamental structure of the user interface for a progressive web application. The structure is used in Magento PWA Studio to reduce the time spent loading a branded experience in the UI.

This approach involves heavily caching the minimal amount of HTML, CSS, and JS to load the basic UI of the page before fetching the rest through an API.

Service Worker

A service worker is a script that runs in the background. It is used for caching and resource recovery.

Component Data Binding

Component data binding is the way data move between the source and a UI component. PWA uses component data binding to connect dynamic data with the user interface.

GraphQL

Similar to REST, GraphQL is a query language on a server. It is used in PWA to push data.

In comparison with REST, GraphQL is more powerful, flexible, and effective.

Advantages:

Predictable results from the query

A single request for many results

Organized data with typed schema

Client State, Reducers & Actions

Client State, Reducers & Actions are Redux concepts that are used to manage and update the status of a web application.

Loading & Offline States

Both loading and offline states are concepts that must be dealt with by PWA.

Container Extensibility

A Container is an HTML element that contains 0 or more Containers Child components. It acts as the target for Magento-loader-layout operations.

With container extensibility, you can reuse and modify your container with no adjustment of the source.

CSS Modules

CSS modules are reusable CSS styles that enable you to develop components with styles but still compatible with external styles.

Performance Patterns

This is an essential concept in PWA, which includes many strategies and patterns available to enhance PWA performance.

Root Components & Routing

A root component of an app is the DOM node under which all other nodes are managed by React.

Routing is the ability to arrange a URL pattern to a suitable handler.

Critical Path

To display a website, we need a critical path, which are steps required to process the HTML, CSS, and JavaScript files. If you want the best performance of your web application, you need to optimize the critical path.

What Is Magento PWA Studio Project?

>>> Don’t Miss This: Magento 2 Testing Framework to Cover All Parts of Your Website!

Magento PWA Studio Project is a set of tools that allows developers to develop, deploy, and maintain the PWA storefront on top of Magento 2.

Advanced tools and libraries are used to create a build system and framework that follow the Magento principles of extensibility.

The Magento PWA Studio Project provides the following tools:

pwa-buildpack CLI tools: Core constructing and development tools.

Peregrine hooks & components: A collection of parts and React hooks.

Venia store & visual components: A proof of concept Magento 2 storefront & visual elements can be used in Magento stores.

UPWARD: A specification of a file that determines the behavior of the server.

pwastudio.io: Magento PWA documentation that guides developers to build Magento 2 storefront.

Shared Magento server: Sample data, make sure that the version of Magento is updated.

Magento PWA Studio Tutorial – Project Setup Guide

>>> Check It Our: More Magento tutorials to optimize e-commerce sites!

This comprehensive tutorial provides several best practices of Magento PWA Studio that help to integrate PWA into Magento.

Besides, in this blog, we just provide tutorials of setting-up step, which is a fundamental step of the whole process.

Getting Started

If you haven’t installed Yarn, Node.js, please install it to setup Magento PWA Storefront.

In case you have it, you need to check the versions by running the 2 following commands:

node -v

yarn -v

STEP 1: Run The Scaffolding Tool

In the terminal, you need to navigate to the directory where you want to install your storefront project and run the scaffolding tool:

yarn create @magento/pwa

Alternative commands:

npx @magento/create-pwa

npm init @magento/pwa

Then, please answer the following questions from the interactive questionnaire:

Run this command to navigate to your project’s root directory:

cd pwa-studio-fundamentals

STEP 2: Start The Storefront Application

In the second step of the Magento PWA tutorial, you need to execute the below command to start the dev server at http://0.0.0.0:10000/:

yarn watch

After that, it will detect whether there is any change or not. If a change is identified, the application running in the browser will update the change.

To stop the dev server, please press the key combination of Ctrl+C in the running terminal window.

STEP 3: Add A Custom Hostname & SSL Certificate

This step is necessary, especially when working on many storefront projects, as each project needs a custom hostname to avoid conflict with service workers or ports.

You can simply create a custom hostname and SSL certificate by using create-custom-origin sub-command as followed:

yarn buildpack create-custom-origin ./

Update Environment Variables (Optional)

You can choose to perform this step or not since the scaffolding command already adds the required environment variables to the environment file.

In case you want to, you can update your project’s .env file and change the property values.

You can find more Magento PWA Studio Tutorials in Magento PWA documentation.

Troubleshooting

Because it is kind of complicated to set up the project, errors can happen anytime. Let’s see some common faults and how to fix it.

Node Version Error

This fault may happen because you are using the wrong node version. Specifically, the node v12 is not compatible with early versions of the PWA studio.

To solve this problem, you should use a node version manager, for example, n or nvm, to switch to different versions.

Caching Problems

In case you face a caching problem, just simply empty the full application storage and start over.

Let us give you a specific example of using Chrome:

Open the Developer Tools

In the Application tab, select Clear Storage

Press the “Clear site data” button to finish

Unable to Get The Data from Magento

If you are running into a problem that your storefront does not get the data from Magento, you should verify the MAGENTO_BACKEND_URL in your .env file, which is accessible from your dev server.

Privacy Error

This issue is quite common while visiting a website.

The reason is that your project has an invalid or expired certificate. As a result, the browser doesn’t trust the generated SSL certificate.

Some users have suggested deleting the devcert folder to trigger certification regeneration.

Such a folder is found at different places in different operating systems.

In MacOS:

~/Library/Application Support/devcert

In Window system:

${User}\AppData\Local\devcert

Conclusion

In conclusion, PWA is so useful that we highly recommend online store owners to set up to gain more customers.

We hope that this Magento PWA Studio Tutorial is helpful to start working on Magento PWA. If you want us to deliver more Magento PWA tutorials, don’t hesitate to comment in the section below.

Thanks a lot for reading!

The post Magento PWA Studio Tutorial: Step by Step to Get Maximum Customers appeared first on Mageguides.

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