Ümit Ünal umit

Apache Kafka

"A high-throughput distributed messaging system." site

Notes taken from source

Overview

Created at LinkedIn (open sourced in 2011)

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

Index:

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

Index:

Infrastructure, Operations and DevOps

	// Reduction: We can sum all the elements
	// with the usual recursive schema
	def sum(xs: List[Int]): Int = xs match {
	case Nil => 0
	case y :: ys => y + sum(ys)
	}

	// But this can be abstracted out using 'reduceLeft'
	// That will perform these operations LINKING to the left
	def sum(xs: List[Int]) = (0 :: xs) reduceLeft ((x, y) = x + y)

	import java.util.Map;

	import javax.sql.DataSource;

	import org.springframework.beans.factory.annotation.Autowired;
	import org.springframework.beans.factory.annotation.Qualifier;
	import org.springframework.boot.autoconfigure.orm.jpa.EntityManagerFactoryBuilder;
	import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
	import org.springframework.context.annotation.Bean;
	import org.springframework.context.annotation.ComponentScan.Filter;

	// --- Compiling ---
	$ wget http://download.redis.io/releases/redis-2.8.3.tar.gz
	$ tar xzvf redis-2.8.3.tar.gz
	$ cd redis-2.8.3
	$ make
	$ make install

	// --- or using yum ---
	$ rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
	$ rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

	======================================
	Usage:

	Fetcher<Source, MyEntity> f = new Fetcher<Source, MyEntity>(source) {
	@Override
	public List<MyEntity> fetch(Pageable pageRequest)
	{
	return source.findAll(pageRequest);
	}
	};

	// $ scala-2.11.5 -Xexperimental

	// Original Java 8 version: http://winterbe.com/posts/2014/07/31/java8-stream-tutorial-examples/

	scala> import java.util.{Arrays, List, ArrayList}
	scala> import java.util.stream.{Stream, IntStream}

	// List<String> myList = Arrays.asList("a1", "a2", "b1", "c2", "c1");

	scala> val myList = Arrays.asList("a1", "a2", "b1", "c2", "c1")