Akka(1)Introduction
Akka(1)Introduction
1.Introduction
1.1WhatisAkka?
Designtowritecorrectconcurrent,fault-tolerantandscalableapplications.
Akkaimplementsauniquehybrid
Actors
Simpleandhigh-levelabstractionsforconcurrencyandparallelism.
Asynchronous,non-blockingandhighlyperformantevent-drivenprogrammingmodel.
lightweightevent-drivenprocesses,2.7millionactorsperGBRAM
Scaladocuments:http://doc.akka.io/docs/akka/2.1.0/scala/actors.html#actors-scala
FaultTolerance
FaulthandlinginPracticeforscala
http://doc.akka.io/docs/akka/2.1.0/scala/fault-tolerance.html#fault-tolerance-scala
LocationTransparency
Allinteractionsofactorsusepuremessagepassingandeverythingisasynchronous.
http://doc.akka.io/docs/akka/2.1.0/general/remoting.html#remoting
Transactors
transactorscombineactorsandSoftwareTransactionalMemory(STM)intotransactionalactors.
http://doc.akka.io/docs/akka/2.1.0/scala/transactors.html#transactors-scala
ScalaAPIs
http://doc.akka.io/docs/akka/2.1.0/scala/index.html#scala-api
Akkacanbeusedin2differentways
AsalibraryinWEB-INF/lib
Asamicrokernel,stand-alonekernel
http://doc.akka.io/docs/akka/2.1.0/scala/microkernel.html#microkernel-scala
1.2.WhyAkka?
…snip...
1.3GettingStarted
GettingStartedGuidesandTemplateProjects
InstallTypesafeStack
Followthedocumenthere:http://typesafe.com/stack/download-agreed
Installscala,set,mavenandgiter8.ButIalreadyhaveallofthemexceptgiter8.
>sudoportinstallgiter8
Anddownloadthefilefromherehttp://downloads.typesafe.com/typesafe-stack/2.0.2/typesafe-stack-2.0.2.tgz
Unzipandplaceinworkingdirectory.
Ialreadyhaveallthetools,soIdonotneedtypesafestackbin,Ijustwillgothroughtheexample.
Visitthispage,youcanfindalltheexamples:
https://github.com/typesafehub
Modules
akka-actorClassicActors,TypedActors,IOActoretc.
akka-remoteRemoteActors
akka-testkit
akka-kernelAkkamicrokernelforrunningabare-bonesminiapplicationserver
akka-transactorTransactionalactors
akka-agent
akka-camel
akka-zeromqZeroMQintegration
akka-slf4j
akka-filebased-mailbox
Usingareleasedistribution
Downloadthefilefromhere:http://typesafe.com/stack/downloads/akka
Usingwithsbt
"typesaferepo"at"http://repo.typesafe.com/typesafe/releases/",
"com.typesafe.akka"%%"akka-actor"%"2.1.0",
"com.typesafe.akka"%%"akka-testkit"%"2.1.0",
"com.typesafe.akka"%%"akka-transactor"%"2.1.0",
HowcanIuseanddeployAkka
…snip…
References:
http://akka.io/
http://doc.akka.io/docs/akka/2.1.0/
http://typesafe.com/resources/tutorials/getting-started-with-akka-scala.html#getting-started-with-akka-scala
https://github.com/typesafehub