org.apache.slider.server.services.utility

Class AbstractSliderLaunchedService

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.service.CompositeService

org.apache.slider.server.services.workflow.WorkflowCompositeService

org.apache.slider.server.services.utility.LaunchedWorkflowCompositeService

org.apache.slider.server.services.utility.AbstractSliderLaunchedService

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.hadoop.service.Service, org.apache.hadoop.service.ServiceStateChangeListener, RunService, ServiceParent

Direct Known Subclasses:

SliderAppMaster, SliderClient

public abstract class AbstractSliderLaunchedService
extends LaunchedWorkflowCompositeService

Base service for the standard slider client/server services

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.service.CompositeService

org.apache.hadoop.service.CompositeService.CompositeServiceShutdownHook

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

org.apache.hadoop.service.Service.STATE

Field Summary

Fields inherited from class org.apache.hadoop.service.CompositeService

STOP_ONLY_STARTED_SERVICES

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSliderLaunchedService(String name)

Method Summary

Methods

Modifier and Type	Method and Description
protected org.apache.hadoop.registry.client.api.RegistryOperations	createRegistryOperationsInstance() Create the registry operations instance.
String	lookupZKQuorum() look up the registry quorum from the config
protected static void	require(boolean condition, String message, Object... args) Require a condition to hold; throw BadCommandArgumentsException if not.
protected static void	requireArgumentSet(String argname, String value) Utility method to require an argument to be set (non null, non-empty)
org.apache.hadoop.registry.client.api.RegistryOperations	startRegistryOperationsService() Create, adopt ,and start the YARN registration service

Methods inherited from class org.apache.slider.server.services.utility.LaunchedWorkflowCompositeService

addService, bindArgs, deployChildService, getArgv, isSet, isUnset, runService

Methods inherited from class org.apache.slider.server.services.workflow.WorkflowCompositeService

stateChanged

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

addIfService, getServices, removeService, serviceInit, serviceStart, serviceStop

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

Methods inherited from interface org.apache.hadoop.service.Service

close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, registerServiceListener, start, stop, unregisterServiceListener, waitForServiceToStop

Methods inherited from interface org.apache.slider.server.services.workflow.ServiceParent

getServices

Constructor Detail

AbstractSliderLaunchedService

protected AbstractSliderLaunchedService(String name)

Method Detail

lookupZKQuorum

public String lookupZKQuorum()
                      throws BadConfigException

look up the registry quorum from the config

Returns:

the quorum string

Throws:

BadConfigException - if it is not there or invalid

startRegistryOperationsService

public org.apache.hadoop.registry.client.api.RegistryOperations startRegistryOperationsService()
                                                                                        throws BadConfigException

Create, adopt ,and start the YARN registration service

Returns:

the registry operations service, already deployed as a child of the AbstractSliderLaunchedService instance.

Throws:

BadConfigException

createRegistryOperationsInstance

protected org.apache.hadoop.registry.client.api.RegistryOperations createRegistryOperationsInstance()

Create the registry operations instance. This is to allow subclasses to instantiate a subclass service

Returns:

an instance to match to the lifecycle of this service

requireArgumentSet

protected static void requireArgumentSet(String argname,
                      String value)
                                  throws BadCommandArgumentsException

Utility method to require an argument to be set (non null, non-empty)

Parameters:

argname - argument name

value - value

Throws:

BadCommandArgumentsException - if the condition is not met

require

protected static void require(boolean condition,
           String message,
           Object... args)
                       throws BadCommandArgumentsException

Require a condition to hold; throw BadCommandArgumentsException if not. The exception text is the formatted message.

Parameters:

condition - condition

message - string to format

args - list of arguments to format.

Throws:

BadCommandArgumentsException