richardxin

Installing Cassandra on Mac OS X

Homebrew is a great little package manager for OS X. If you haven't already, installing it is pretty easy:

ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

Magic words:

psql -U postgres

If run with -E flag, it will describe the underlaying queries of the \ commands (cool for learning!).

Most \d commands support additional param of __schema__.name__ and accept wildcards like *.*

	import akka.actor._
	import akka.stream.scaladsl.Flow
	import org.apache.spark.streaming.dstream.ReceiverInputDStream
	import org.apache.spark.streaming.receiver.ActorHelper
	import akka.actor.{ ExtensionKey, Extension, ExtendedActorSystem }

	import scala.reflect.ClassTag

	object AkkaStreamSparkIntegration {

	#!/bin/bash

	GIT_REPO="https://github.com/richardxin/test"
	if [ $# -ne 2 ]; then
	echo "=== Missing arguments ===: \nUSAGE: deploy_note.sh <zeppelin_env> <note_name>"
	exit 1
	fi

	# replace / with -
	file_name="${2/\//-}.json"

	#!/bin/bash

	STATUS_URL="http://$1:8890/api/notebook/job/$2"

	# curl -X GET http://ec2-34-215-13-164.us-west-2.compute.amazonaws.com:8890/api/notebook \| jq '.body[] \| select (.id == "2CX4Y3FAS") \| .name'
	while true
	do
	STATUS=`curl -X GET $STATUS_URL \| jq -cr '.body[] \| .status'`
	echo $STATUS

	#!/bin/bash
	# example: sh run_note.sh ec2-34-215-13-164.us-west-2.compute.amazonaws.com 2CX4Y3FAS
	# Usage: run_note.sh "<zeppelin_host>" "<note_id>"

	# http://[zeppelin-server]:[zeppelin-port]/api/notebook/job/[noteId]
	if [ $# -ne 2 ]; then
	echo "=== Missing arguments ===: \nUSAGE: run_note.sh <zeppelin_host> <note_id>"
	exit 1
	fi

	#!/bin/bash

	# Usage: slackpost "<webhook_url>" "<channel>" "<username>" "<message>"
	# also (echo $RANDOM; echo $RANDOM) \|slackpost "<channel>" "<username>"
	# https://gist.github.com/dopiaza/6449505

	# ------------
	webhook_url=$1
	if [[ $webhook_url == "" ]]
	then