org.apache.hive.service

Class AbstractService

java.lang.Object

org.apache.hive.service.AbstractService

All Implemented Interfaces:

Service

Direct Known Subclasses:

BreakableService, CompositeService, OperationManager, ThriftCLIService

public abstract class AbstractService
extends Object
implements Service

AbstractService.

Nested Class Summary

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

Service.STATE

Constructor Summary

Constructors

Constructor and Description
AbstractService(String name) Construct the service.

Method Summary

Methods

Modifier and Type	Method and Description
HiveConf	getHiveConf() Get the configuration of this service.
String	getName() Get the name of this service.
Service.STATE	getServiceState() Get the current service state
long	getStartTime() Get the service start time
void	init(HiveConf hiveConf) Initialize the service.
void	register(ServiceStateChangeListener l) Register an instance of the service state change events.
void	start() Start the service.
void	stop() Stop the service.
void	unregister(ServiceStateChangeListener l) Unregister a previously instance of the service state change events.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractService

public AbstractService(String name)

Construct the service.

Parameters:

name - service name

Method Detail

getServiceState

public Service.STATE getServiceState()

Description copied from interface: Service

Get the current service state

Specified by:

getServiceState in interface Service

Returns:

the state of the service

init

public void init(HiveConf hiveConf)

Initialize the service. The transition must be from Service.STATE.NOTINITED to Service.STATE.INITED unless the operation failed and an exception was raised.

Specified by:

init in interface Service

Throws:

IllegalStateException - if the current service state does not permit this action

start

public void start()

Start the service. The transition should be from Service.STATE.INITED to Service.STATE.STARTED unless the operation failed and an exception was raised.

Specified by:

start in interface Service

Throws:

IllegalStateException - if the current service state does not permit this action

stop

public void stop()

Stop the service. This operation must be designed to complete regardless of the initial state of the service, including the state of all its internal fields.

Specified by:

stop in interface Service

Throws:

IllegalStateException - if the current service state does not permit this action

register

public void register(ServiceStateChangeListener l)

Description copied from interface: Service

Register an instance of the service state change events.

Specified by:

register in interface Service

Parameters:

l - a new listener

unregister

public void unregister(ServiceStateChangeListener l)

Description copied from interface: Service

Unregister a previously instance of the service state change events.

Specified by:

unregister in interface Service

Parameters:

l - the listener to unregister.

getName

public String getName()

Description copied from interface: Service

Get the name of this service.

Specified by:

getName in interface Service

Returns:

the service name

getHiveConf

public HiveConf getHiveConf()

Description copied from interface: Service

Get the configuration of this service. This is normally not a clone and may be manipulated, though there are no guarantees as to what the consequences of such actions may be

Specified by:

getHiveConf in interface Service

Returns:

the current configuration, unless a specific implementation chooses otherwise.

getStartTime

public long getStartTime()

Description copied from interface: Service

Get the service start time

Specified by:

getStartTime in interface Service

Returns:

the start time of the service. This will be zero if the service has not yet been started.