Scala

@diego_pacheco Software Architect | Agile Coach

2.2.0

Suécia

Actors

Actors Model

NO Shared Data

Async Messages Lightweight Threads

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6

Akka: Success Cases

2.2.0

Cluster Support! Hell Yeah, Finally!

Cluster Support! - Fault Tolerance

- Elastic, Scale out

- No SPOF(Single Point of Failure)

- Amazon Dynamo-style / Riak - gossip protocol

- Automatic Failure Detection

Cluster Membership

Cluster Configuration

Cluster Code

Cluster Log – Node 2 [INFO] [08/02/2013 02:43:24.276] [main] [Remoting] Starting remoting [INFO] [08/02/2013 02:43:24.456] [main] [Remoting] Remoting started; listening on addresses :[akka.tcp://ClusterSystem@127.0.0.1:2552] [INFO] [08/02/2013 02:43:24.472] [main] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2552] - Starting up... [INFO] [08/02/2013 02:43:24.535] [main] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2552] - Registered cluster JMX MBean [akka:type=Cluster] [INFO] [08/02/2013 02:43:24.535] [main] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2552] - Started up successfully [INFO] [08/02/2013 02:43:24.541] [ClusterSystem-akka.actor.default-dispatcher-3] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2552] - Metrics will be retreived from MBeans, and may be incorrect on some platforms. To increase metric accuracy add the 'sigar.jar' to the classpath and the appropriate platform-specific native libary to 'java.library.path'. Reason: java.lang.ClassNotFoundException: org.hyperic.sigar.Sigar [INFO] [08/02/2013 02:43:24.545] [ClusterSystem-akka.actor.default-dispatcher-3] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2552] - Metrics collection has started successfully [INFO] [08/02/2013 02:43:24.563] [ClusterSystem-akka.actor.default-dispatcher-2] [akka://ClusterSystem/user/clusterListener] Current members: [INFO] [08/02/2013 02:43:24.820] [ClusterSystem-akka.actor.default-dispatcher-12] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2552] - Welcome from [akka.tcp://ClusterSystem@127.0.0.1:2551] [INFO] [08/02/2013 02:43:24.828] [ClusterSystem-akka.actor.default-dispatcher-12] [akka://ClusterSystem/user/clusterListener] Member is Up: akka.tcp://ClusterSystem@127.0.0.1:2551 [INFO] [08/02/2013 02:43:25.259] [ClusterSystem-akka.actor.default-dispatcher-3] [akka://ClusterSystem/user/clusterListener] Member is Up: akka.tcp://ClusterSystem@127.0.0.1:2552

Cluster Log – Node 1 [INFO] [08/02/2013 02:42:26.947] [main] [Remoting] Starting remoting [INFO] [08/02/2013 02:42:27.134] [main] [Remoting] Remoting started; listening on addresses :[akka.tcp://ClusterSystem@127.0.0.1:2551] [INFO] [08/02/2013 02:42:27.149] [main] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2551] - Starting up... [INFO] [08/02/2013 02:42:27.211] [main] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2551] - Registered cluster JMX MBean [akka:type=Cluster] [INFO] [08/02/2013 02:42:27.211] [main] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2551] - Started up successfully [INFO] [08/02/2013 02:42:27.217] [ClusterSystem-akka.actor.default-dispatcher-2] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2551] - Metrics will be retreived from MBeans, and may be incorrect on some platforms. To increase metric accuracy add the 'sigar.jar' to the classpath and the appropriate platform-specific native libary to 'java.library.path'. Reason: java.lang.ClassNotFoundException: org.hyperic.sigar.Sigar [INFO] [08/02/2013 02:42:27.221] [ClusterSystem-akka.actor.default-dispatcher-2] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2551] - Metrics collection has started successfully [INFO] [08/02/2013 02:42:27.234] [ClusterSystem-akka.actor.default-dispatcher-3] [akka://ClusterSystem/user/clusterListener] Current members: [INFO] [08/02/2013 02:42:31.350] [ClusterSystem-akka.actor.default-dispatcher-12] [akka://ClusterSystem/deadLetters] Message [akka.cluster.InternalClusterAction$InitJoin$] from Actor[akka://ClusterSystem/system/cluster/core/daemon/firstSeedNodeProcess#-975951196] to Actor[akka://ClusterSystem/deadLetters] was not delivered. [1] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [INFO] [08/02/2013 02:42:31.350] [ClusterSystem-akka.actor.default-dispatcher-12] [akka://ClusterSystem/deadLetters] Message [akka.cluster.InternalClusterAction$InitJoin$] from Actor[akka://ClusterSystem/system/cluster/core/daemon/firstSeedNodeProcess#-975951196] to Actor[akka://ClusterSystem/deadLetters] was not delivered. [2] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [INFO] [08/02/2013 02:42:31.350] [ClusterSystem-akka.actor.default-dispatcher-12] [akka://ClusterSystem/deadLetters] Message [akka.cluster.InternalClusterAction$InitJoin$] from Actor[akka://ClusterSystem/system/cluster/core/daemon/firstSeedNodeProcess#-975951196] to Actor[akka://ClusterSystem/deadLetters] was not delivered. [3] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [INFO] [08/02/2013 02:42:31.350] [ClusterSystem-akka.actor.default-dispatcher-12] [akka://ClusterSystem/deadLetters] Message [akka.cluster.InternalClusterAction$InitJoin$] from Actor[akka://ClusterSystem/system/cluster/core/daemon/firstSeedNodeProcess#-975951196] to Actor[akka://ClusterSystem/deadLetters] was not delivered. [4] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [INFO] [08/02/2013 02:42:31.350] [ClusterSystem-akka.actor.default-dispatcher-12] [akka://ClusterSystem/deadLetters] Message [akka.cluster.InternalClusterAction$InitJoin$] from Actor[akka://ClusterSystem/system/cluster/core/daemon/firstSeedNodeProcess#-975951196] to Actor[akka://ClusterSystem/deadLetters] was not delivered. [5] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'. [INFO] [08/02/2013 02:42:32.251] [ClusterSystem-akka.actor.default-dispatcher-2] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2551] - Node [akka.tcp://ClusterSystem@127.0.0.1:2551] is JOINING, roles [] [INFO] [08/02/2013 02:42:33.252] [ClusterSystem-akka.actor.default-dispatcher-12] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2551] - Leader is moving node [akka.tcp://ClusterSystem@127.0.0.1:2551] to [Up] [INFO] [08/02/2013 02:42:33.254] [ClusterSystem-akka.actor.default-dispatcher-14] [akka://ClusterSystem/user/clusterListener] Member is Up: akka.tcp://ClusterSystem@127.0.0.1:2551 [INFO] [08/02/2013 02:43:24.783] [ClusterSystem-akka.actor.default-dispatcher-12] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2551] - Node [akka.tcp://ClusterSystem@127.0.0.1:2552] is JOINING, roles [] [INFO] [08/02/2013 02:43:25.233] [ClusterSystem-akka.actor.default-dispatcher-2] [Cluster(akka://ClusterSystem)] Cluster Node [akka.tcp://ClusterSystem@127.0.0.1:2551] - Leader is moving node [akka.tcp://ClusterSystem@127.0.0.1:2552] to [Up] [INFO] [08/02/2013 02:43:25.234] [ClusterSystem-akka.actor.default-dispatcher-5] [akka://ClusterSystem/user/clusterListener] Member is Up: akka.tcp://ClusterSystem@127.0.0.1:2552

Not Quite There Yet - Actor Partitioning

- Actor Handoff

- Actor Rebalancing

- Stateful Actor Replication

Scala

@diego_pacheco Software Architect | Agile Coach

2.2.0 Obrigado!

Thank You!