terrancesnyder

#! /bin/sh
# ==================================================================
#  ______                           __     _____
# /_  __/___  ____ ___  _________ _/ /_   /__  /
#  / / / __ \/ __ `__ \/ ___/ __ `/ __/     / /
# / / / /_/ / / / / / / /__/ /_/ / /_      / /
#/_/  \____/_/ /_/ /_/\___/\__,_/\__/     /_/

# Multi-instance Apache Tomcat installation with a focus
# on best-practices as defined by Apache, SpringSource, and MuleSoft

pilt

I was at Amazon for about six and a half years, and now I've been at
Google for that long. One thing that struck me immediately about the
two companies -- an impression that has been reinforced almost daily --
is that Amazon does everything wrong, and Google does everything right.
Sure, it's a sweeping generalization, but a surprisingly accurate one.
It's pretty crazy. There are probably a hundred or even two hundred
different ways you can compare the two companies, and Google is superior
in all but three of them, if I recall correctly. I actually did a
spreadsheet at one point but Legal wouldn't let me show it to anyone,
even though recruiting loved it.

rgreenjr

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

patriknw

/**
 * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
 */
package akka.contrib.mailbox

import scala.concurrent.duration._
import java.util.concurrent.atomic.AtomicInteger
import java.util.concurrent.atomic.AtomicLong
import com.typesafe.config.Config
import akka.actor.{ ActorContext, ActorRef, ActorSystem, ExtendedActorSystem }

mrflip

Tuning Storm+Trident

Tuning a dataflow system is easy:

The First Rule of Dataflow Tuning:
* Ensure each stage is always ready to accept records, and
* Deliver each processed record promptly to its destination

byllc

###IF you are using Raspian many of these tasks are unescessary. With Raspbian:

• SSH is ready to go out of the box
• default runlevel is 3
• many items can be configured with raspi-config tool

###Adding more swap for high memory use concerns

  sudo dd if=/dev/zero of=/swap bs=1M count=1024
  sudo mkswap /swap
  sudo swapon /swap

danehammer

import backtype.storm.generated.Grouping;
import backtype.storm.hooks.BaseTaskHook;
import backtype.storm.hooks.info.BoltAckInfo;
import backtype.storm.hooks.info.EmitInfo;
import backtype.storm.task.TopologyContext;

import java.util.Map;
import java.util.concurrent.TimeUnit;

import com.google.common.collect.ArrayListMultimap;

colestanfield

// Create a new MergeStrategy for aop.xml files
val aopMerge: MergeStrategy = new MergeStrategy {
  val name = "aopMerge"
  import scala.xml._
  import scala.xml.dtd._

  def apply(tempDir: File, path: String, files: Seq[File]): Either[String, Seq[(File, String)]] = {
    val dt = DocType("aspectj", PublicID("-//AspectJ//DTD//EN", "http://www.eclipse.org/aspectj/dtd/aspectj.dtd"), Nil)
    val file = MergeStrategy.createMergeTarget(tempDir, path)

rahilb

-- an openresty/nginx authenticator that checks bearer tokens with
-- an ID service for use with `access_by_lua_file` nginx directive

local http = require "resty.http"
local hc = http:new()

function abandon_request(status_code, response_body)
    ngx.header["WWW-Authenticate"] = "Bearer"
    ngx.status = status_code
    ngx.say(response_body)

milessabin

scala> class Foo { self: Singleton => }
defined class Foo

scala> class Bar extends Foo
<console>:12: error: illegal inheritance;
 self-type Bar does not conform to Foo's selftype Foo with Singleton
       class Bar extends Foo
                         ^

scala> object Bar extends Foo