mohanmca

Always start truning the young generation first.

java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -verbose:gc  -Xloggc:/var/tmp/jvm_gc.log

java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:PrintHeapAtGc -XX:-PrintTenuringDistribution -XX:-HeapDumpOnOutOfMemoryError -verbose:gc  -Xloggc:/var/tmp/jvm_gc.log

Histogram
-XX:-PrintClassHistogram (JMap -histo)

mohanmca

ElasticSearch is SchemaFree, Lucene based, Massively scalable, Distributed.

Run as many time as you want. (Multinode)

$> bin/elasticsearch
$> curl -XGET localhost:9200/?pretty
$> curl "http://localhost:9200/_cluster/health?pretty=true" 

$> PUT /index/type/id (database/Table/EntityID)
$> curl -XPUT /mysite/node/1 -d

mohanmca

http://gallery.mailchimp.com/2956421f3caab54f1e563f370/files/Flexible_Analytics_for_Large_Data_Sets_Using_Elasticsearch.pdf 

http://stackoverflow.com/questions/4415511/scala-type-programming-resources

mohanmca

#!/bin/sh

# one way (older scala version will be installed)
# sudo apt-get install scala

#2nd way
sudo apt-get remove scala-library scala
wget http://www.scala-lang.org/files/archive/scala-2.11.2.deb
sudo dpkg -i scala-2.11.2.deb
sudo apt-get update

mohanmca

TesCase gives confident, and time spent on writing testcase always ended up worthwhile.

Are you stuck? confirm that you read the wiki/document from top-to-bottom, and confirm that you are not trying to jump fence by assuming what is written in wiki

mohanmca

Friday 11/14/14

notes by Steven Gangstead

Rapture Art of One-liner - Jon Pretty @propensive

rapture.io -collection of libraries for scala

jawn json parser. Quicker than Jackson, and I guess Jackson must normally be considered the quickest.

My thoughts: Awesome talk. Look into rapture, looks useful. Jon is smart.

mohanmca

##Scala eXchange 2014 slides

collected by Adam Warski

Feel free to complete the list!

The Binary Compatibility Challenge by Martin Odersky

A Skeptic's Look at scalaz' "Gateway Drugs”: A Practical Exploration by Brendand McAdams

mohanmca

	One	Many
Synchronous	T/Try[T]	Iterable[T]
Asynchronous	Future[T]	Observable[T]

Via Erik Meijer/Reactive Programming (video) and slides

mohanmca

indylambda: Putting invokedynamic to work for Scala

Java 8 introduced lambdas to the Java language. While the design choices differ in many regards from Scala's functions, the underlying mechanics used to represent Java lambdas is flexible enough to be used as a target for the Scala compiler.

Lambdas in Java

Java does not have canonical heirarchy of generic function types (ala scala.FunctionN), but instead allows a lambda to be used as a shorthand for an anonymous implementation of an Functional Interface

Here's an example of creating a predicate that closes over one value:

mohanmca