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:

	/*
	* @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));