Paul Battisson pbattisson

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

Introduce Gizzard of Twitter - 트위터의 새로운 분산 관리 라이브러리 Gizzard를 소개합니다.
The Architecture Twitter Uses to Deal with 150M Active Users, 300K QPS, a 22 MB/S Firehose, and Send Tweets in Under 5 Seconds
Scaling Twitter: Making Twitter 10000 Percent Faster

2015-01-29 Unofficial Relay FAQ

Compilation of questions and answers about Relay from React.js Conf.

Disclaimer: I work on Relay at Facebook. Relay is a complex system on which we're iterating aggressively. I'll do my best here to provide accurate, useful answers, but the details are subject to change. I may also be wrong. Feedback and additional questions are welcome.

What is Relay?

Relay is a new framework from Facebook that provides data-fetching functionality for React applications. It was announced at React.js Conf (January 2015).

Initial Set-Up

Authenticate with Dev Hub (one time)

The Dev Hub is our production org. Scratch orgs are registered against a Dev Hub and can be managed from there. Execute the following command in a terminal (you'll be prompted to enter your username and password in a browser window):

sfdx force:auth:web:login --setdefaultdevhubusername -a Unum_DevHub

Set Your Default Dev Hub Username

It's possible to have multiple Dev Hub orgs. If you want to change to a different Dev Hub, you must specify your defaultdevhubusername setting with this command:

Background: I find Cursor struggles to retrieve content from Salesforce documentation links due to various approaches used such as as shadow dom and dynamic loading. This Cursor command leverages Cursors Browser Automation tool (needs to be explcitly enabled) to help give it a few more clues on how to deal with these pages. I initially built a shell script for it to call but then I discovered Cursor commands. So I built this command using Cursor itself once we had both figured this out - effectively it wrote its own instructions. Use at your own risk.

Usage: In Cursor type / and select Create Command enter sfdoc and press enter. Then paste the content below into the file. To use, use prompts like Read this https://developer.salesforce.com/docs... using /sfdoc. Make sure you have chromium NPM library installed globally as the Node.js scripts below require it. Also make sure you have given Cursor permission to use your browser - there is a icon bottom right of the chat window to enable this in

	/*
	* @description: A code snippet that mimics the popular Select * SQL syntax in force.com's Apex language.
	*/

	// Initialize setup variables
	String objectName = 'Contact'; // modify as needed
	String query = 'SELECT';
	Map<String, Schema.SObjectField> objectFields = Schema.getGlobalDescribe().get(objectName).getDescribe().fields.getMap();

	// Grab the fields from the describe method and append them to the queryString one by one.

	// see https://salesforce.stackexchange.com/questions/165551/possible-to-update-namedcredential-from-apex

	MetadataService.NamedCredential credential = new MetadataService.NamedCredential();
	credential.fullName = 'Demo_Credential';
	credential.label = 'Demo Credential';
	credential.endpoint = 'https://www.DEMO2.com';
	credential.principalType = 'NamedUser';
	credential.protocol = 'NoAuthentication';

	system.debug(createMetadata(credential));