com.groupon.mesos.zookeeper

Class ZookeeperMasterDetector

java.lang.Object

com.groupon.mesos.zookeeper.ZookeeperMasterDetector

All Implemented Interfaces:

Closeable, AutoCloseable

public class ZookeeperMasterDetector
extends Object
implements Closeable

Mesos master detector. Watches all the child nodes of the mesos directory in zookeeper, loads all the child nodes when anything changes and uses the numerically lowest as master. Uses the event bus to decouple event submission from event execution, otherwise caller threads might end up running large swaths of watcher specific codes (especially when the master changes). May be overkill but it seems to be the right thing.

Constructor Summary

Constructors

Constructor and Description
ZookeeperMasterDetector(String master, ManagedEventBus eventBus)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
com.google.common.util.concurrent.ListenableFuture<org.apache.mesos.Protos.MasterInfo>	detect(org.apache.mesos.Protos.MasterInfo previous)
void	processDetect(DetectMessage message)
void	processMasterUpdate(MasterUpdateMessage message)
void	start()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ZookeeperMasterDetector

public ZookeeperMasterDetector(String master,
                       ManagedEventBus eventBus)
                        throws IOException

Throws:

IOException

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

start

public void start()

detect

public com.google.common.util.concurrent.ListenableFuture<org.apache.mesos.Protos.MasterInfo> detect(org.apache.mesos.Protos.MasterInfo previous)

processMasterUpdate

public void processMasterUpdate(MasterUpdateMessage message)

processDetect

public void processDetect(DetectMessage message)