org.jboss.msc.service
Interface ServiceController<S>

Type Parameters:

S - the service type

All Superinterfaces:

Value<S>

public interface ServiceController<S>
extends Value<S>

A controller for a single service instance.

Author:

David M. Lloyd

Nested Class Summary

static class	ServiceController.Mode The controller mode for a service.
static class	ServiceController.State A possible state for a service controller.

Method Summary

void	addListener(ServiceListener<? super S> serviceListener) Add a service listener.
boolean	compareAndSetMode(ServiceController.Mode expected, ServiceController.Mode newMode) Compare the current mode against expected; if it matches, change it to newMode.
ServiceName[]	getAliases() Get other names this service is known as.
Location	getLocation() Get the location of this service.
ServiceController.Mode	getMode() Get the service controller's current mode.
ServiceName	getName() Get the name of this service, if any.
ServiceContainer	getServiceContainer() Get the service container associated with this controller.
StartException	getStartException() Get the reason why the last start failed.
ServiceController.State	getState() Get the current service controller state.
S	getValue() Get the service value.
void	removeListener(ServiceListener<? super S> serviceListener) Remove a service listener.
void	retry() Retry a failed service.
void	setMode(ServiceController.Mode mode) Change the service controller's current mode.

Method Detail

getServiceContainer

ServiceContainer getServiceContainer()

Get the service container associated with this controller.

Returns:

the container

getMode

ServiceController.Mode getMode()

Get the service controller's current mode.

Returns:

the controller mode

compareAndSetMode

boolean compareAndSetMode(ServiceController.Mode expected,
                          ServiceController.Mode newMode)

Compare the current mode against expected; if it matches, change it to newMode. The return value is true when the mode was matched and changed.

Parameters:

expected - the expected mode

newMode - the new mode

Returns:

true if the mode was changed

setMode

void setMode(ServiceController.Mode mode)

Change the service controller's current mode. Might result in the service starting or stopping. The mode may only be changed if it was not already set to ServiceController.Mode.REMOVE. Calling this method with the controller's current mode has no effect and is always allowed.

Parameters:

mode - the new controller mode

Throws:

IllegalStateException - if the mode given is null, or the caller attempted to change the service's mode from ServiceController.Mode.REMOVE to a different mode

getState

ServiceController.State getState()

Get the current service controller state.

Returns:

the current state

getValue

S getValue()
           throws IllegalStateException

Get the service value.

Specified by:

getValue in interface Value<S>

Returns:

the service value

Throws:

IllegalStateException - if the service is not available (i.e. it is not up)

getName

ServiceName getName()

Get the name of this service, if any.

Returns:

the name, or null if none was specified.

getAliases

ServiceName[] getAliases()

Get other names this service is known as.

Returns:

the aliases

getLocation

Location getLocation()

Get the location of this service.

Returns:

the location

addListener

void addListener(ServiceListener<? super S> serviceListener)

Add a service listener. The method corresponding to the current service state is called.

Parameters:

serviceListener - the service listener

removeListener

void removeListener(ServiceListener<? super S> serviceListener)

Remove a service listener.

Parameters:

serviceListener - the service listener to remove

getStartException

StartException getStartException()

Get the reason why the last start failed.

Returns:

the last start exception, or null if the last start succeeded or the service has not yet started

retry

void retry()

Retry a failed service. Does nothing if the state is not ServiceController.State.START_FAILED.