org.apache.hadoop.mapreduce.v2.app.launcher

Class ContainerLauncherImpl

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl

All Implemented Interfaces:

Closeable, AutoCloseable, ContainerLauncher, Service, EventHandler<ContainerLauncherEvent>

public class ContainerLauncherImpl
extends AbstractService
implements ContainerLauncher

This class is responsible for launching of containers.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncher

ContainerLauncher.EventType

Nested classes/interfaces inherited from interface org.apache.hadoop.service.Service

Service.STATE

Field Summary

Fields

Modifier and Type	Field and Description
protected BlockingQueue<ContainerLauncherEvent>	eventQueue
protected static int	INITIAL_POOL_SIZE
protected ThreadPoolExecutor	launcherPool

Constructor Summary

Constructors

Constructor and Description
ContainerLauncherImpl(AppContext context)

Method Summary

Methods

Modifier and Type	Method and Description
protected org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl.EventProcessor	createEventProcessor(ContainerLauncherEvent event)
ContainerManagementProtocolProxy.ContainerManagementProtocolProxyData	getCMProxy(String containerMgrBindAddr, ContainerId containerId)
void	handle(ContainerLauncherEvent event)
protected void	serviceInit(Configuration conf) All initialization code needed by a service.
protected void	serviceStart() Actions called during the INITED to STARTED transition.
protected void	serviceStop() Actions called during the transition to the STOPPED state.

Methods inherited from class org.apache.hadoop.service.AbstractService

close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop

Methods inherited from class java.lang.Object

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

Field Detail

launcherPool

protected ThreadPoolExecutor launcherPool

INITIAL_POOL_SIZE

protected static final int INITIAL_POOL_SIZE

See Also:

Constant Field Values

eventQueue

protected BlockingQueue<ContainerLauncherEvent> eventQueue

Constructor Detail

ContainerLauncherImpl

public ContainerLauncherImpl(AppContext context)

Method Detail

serviceInit

protected void serviceInit(Configuration conf)
                    throws Exception

Description copied from class: AbstractService

All initialization code needed by a service. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.init(Configuration) prevents re-entrancy. The base implementation checks to see if the subclass has created a new configuration instance, and if so, updates the base class value

Overrides:

serviceInit in class AbstractService

Parameters:

conf - configuration

Throws:

Exception - on a failure -these will be caught, possibly wrapped, and wil; trigger a service stop

serviceStart

protected void serviceStart()
                     throws Exception

Description copied from class: AbstractService

Actions called during the INITED to STARTED transition. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.start() prevents re-entrancy.

Overrides:

serviceStart in class AbstractService

Throws:

Exception - if needed -these will be caught, wrapped, and trigger a service stop

serviceStop

protected void serviceStop()
                    throws Exception

Description copied from class: AbstractService

Actions called during the transition to the STOPPED state. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.stop() prevents re-entrancy. Implementations MUST write this to be robust against failures, including checks for null references -and for the first failure to not stop other attempts to shut down parts of the service.

Overrides:

serviceStop in class AbstractService

Throws:

Exception - if needed -these will be caught and logged.

createEventProcessor

protected org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl.EventProcessor createEventProcessor(ContainerLauncherEvent event)

handle

public void handle(ContainerLauncherEvent event)

Specified by:

handle in interface EventHandler<ContainerLauncherEvent>

getCMProxy

public ContainerManagementProtocolProxy.ContainerManagementProtocolProxyData getCMProxy(String containerMgrBindAddr,
                                                                               ContainerId containerId)
                                                                                 throws IOException

Throws:

IOException