James Campbell jcampbell05

Core Priorities

Lower the barrier of entry to adopting and understanding TypeScript. North star.
Understand the TypeScript Codebase enough to provide useful API documentation and fix bugs. Validated by having a more comprehensive set of tools for people to understand how the language and tooling works.
Make contributing to TypeScript easier, and reduce the amount of work maintainers need to do. Validated probably by the number of open PRs, and the number of external contributors per release.
Make it easier to people wanting to build tooling around TypeScript. Validated by seeing more usage of tools like the community discord, people shipping tools with TypeScript support by default etc.

Note: This post is a summary of information paraphrased from an excellent blog post by Christian Sepulveda.

Prerequisites

Instructions

Create the app and download the necessary dependencies.

I wanted to build an LDAP server that queries a MySQL server to fetch users and check their passwords. It is mainly used for old software that does not work with custom OAuth2 providers. Redmine is an example of this.

ldapjs: library to start-off LDAP servers from scratch
node.js driver for mysql: to connect to a mysql server

Instructions:

Create the database and table with insert.sql

Terraform Blue-Green Deploy example

Note: Use Terraform Modules as functions!!!

This will allow you to create a "networking" module, and use those outputs to populate the security groups, access zones, and subnet id's for your other modules.

Using autoscaling groups with a fixed size will protect you from AWs bugs or instance outages. This way an instance that dies, will be replaced so you always maintain the expected amount of instances for that service.

Workflow:

A quick note on how I'm currently handling Blue/Green or A/B deployments with Terraform and AWS EC2 Auto Scaling.

In my particular use case, I want to be able to inspect an AMI deployment manually before disabling the previous deployment.

Hopefully someone finds this useful, and if you have and feedback please leave a comment or email me.

Overview

I build my AMI's using Packer and Ansible.

Disclaimer

I'm still very new to Kafka, eventsourcing, stream processing, etc. I'm in the middle of building my first production system with this stuff and am writing this at the request of a few folks on Twitter. So if you do have experience, please do me and anyone else reading this a favor by pointing out things I get wrong :)

Inspirations

The Log — http://engineering.linkedin.com/distributed-systems/log-what-every-software-engineer-should-know-about-real-time-datas-unifying
Turning the database inside out — http://www.confluent.io/blog/2015/03/04/turning-the-database-inside-out-with-apache-samza/
Why local state is a fundamental primitive in stream processing — http://radar.oreilly.com/2014/07/why-local-state-is-a-fundamental-primitive-in-stream-processing.html
Samza
Various functional systems been exposed to over past year or so, React, Flux, RX, etc.

	import createHoverMonitor from './createHoverMonitor';
	import { element, func, oneOfType } from 'prop-types';
	import React, { Component } from 'react';

	const hover = createHoverMonitor();

	/**
	* Use:
	* <Hoverable>
	* {(hover) => <View style={hover && styles.hovered} />}

	-- show running queries (pre 9.2)
	SELECT procpid, age(query_start, clock_timestamp()), usename, current_query
	FROM pg_stat_activity
	WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
	ORDER BY query_start desc;

	-- show running queries (9.2)
	SELECT pid, age(query_start, clock_timestamp()), usename, query
	FROM pg_stat_activity
	WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'

	#!/bin/bash
	# iBeacon Scanner
	# refactored script from Radius Networks referenced in this StackOverflow answer:
	# http://stackoverflow.com/questions/21733228/can-raspberrypi-with-ble-dongle-detect-ibeacons?lq=1

	# Process:
	# 1. start hcitool lescan
	# 2. begin reading from hcidump
	# 3. packets span multiple lines from dump, so assemble packets from multiline stdin
	# 4. for each packet, process into uuid, major, minor, power, and RSSI

	app = [[SBApplicationController sharedInstance] applicationWithBundleIdentifier:@"com.apple.mobilesafari"]
	appIcon = [[SBApplicationIcon alloc] initWithApplication:app]
	iconView = [[SBIconView alloc] init];
	iconView.icon = appIcon;
	iconController = choose(SBIconController)[0]
	iconView.delegate = iconController
	[iconController _revealMenuForIconView:iconView presentImmediately:1]