Raven RavenZZ

Introduction

This article outlines the steps necessary to run a "Hello world" in node.js + express, running on a 64bit Centos 6.4 installation. We will be building the latest version of source (at this moment, v0.10.4) from the upstream provider.

As is written on their homepage, Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. This is a fast, event driven platform and server-side Javascript engine used for building web applications. DigitalOceans' droplets are a cost-effective way to install and start studying server-side Javascript and bulding or deploying web applications with Node.js.

Setup a VPS

Ubuntu14.04下Scala开发环境搭建。

安装JDK，jdk-6u45-linux-x64.bin 将其安装到/usr/lib/jvm/jdk1.6.0_45/。
安装Scala，下载scala-2.11.4.tgz 将其解压到/usr/lib/jvm/scala-2.11.4/。
配置环境变量：

   vim /etc/profile

	public class Startup
	{
	private IServiceCollection _services;
	// This method gets called by the runtime. Use this method to add services to the container.
	// For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940
	public void ConfigureServices(IServiceCollection services)
	{
	_services = services;
	}


	#http://backtobazics.com/scala/4-steps-to-setup-scala-on-centos/


	#Step 1: Download Tarball OR RPM file of Scala 2.11.6 using below commands
	cd /data
	sudo wget http://downloads.typesafe.com/scala/2.12.0-M5/scala-2.12.0-M5.tgz

	#Step 2: Installation
	sudo cp /data/scala-2.12.0-M5.tgz /opt/

	# https://www.tutorialspoint.com/apache_spark/apache_spark_installation.htm

	#dowload file
	sudo wget http://d3kbcqa49mib13.cloudfront.net/spark-2.0.0-bin-hadoop2.7.tgz

	#move file to local
	sudo tar xvf spark-2.0.0-bin-hadoop2.7.tgz

	sudo mv spark-2.0.0-bin-hadoop2.7 /usr/local/spark

	cjson = require "cjson"
	ngx. req. read_body() -- explicitly read the req body
	local data = ngx. req. get_body_data()
	local jsonBody = cjson. decode(data);
	if data then
	local reqs = { }
	--ngx. say("body data:")

	for key, value in pairs(jsonBody) do
	--ngx.print(key)

	function sleep(milliSeconds) {
	var startTime = new Date().getTime();
	while (new Date().getTime() < startTime + milliSeconds);
	}

	npm install `ls node_modules` --save
	npm install `dir node_modules/` --save

	db.setProfilingLevel(0)
	db.system.profile.drop()