org.jboss.msc.service

Class ValueInjectionService<T>

java.lang.Object

org.jboss.msc.service.ValueInjectionService<T>

Type Parameters:

T - the service type

All Implemented Interfaces:

Service<T>, Value<T>

public final class ValueInjectionService<T>
extends java.lang.Object
implements Service<T>

A service which propagates a value from a dependency.

Field Summary

Fields

Modifier and Type	Field and Description
private InjectedValue<T>	injector

Fields inherited from interface org.jboss.msc.service.Service

NULL, NULL_VALUE

Constructor Summary

Constructors

Constructor and Description
ValueInjectionService()

Method Summary

Modifier and Type	Method and Description
Injector<T>	getInjector() Get the injector, which should be used to inject the dependency.
T	getValue() Get the actual value.
void	start(StartContext context) Start the service.
void	stop(StopContext context) Stop the service.

Methods inherited from class java.lang.Object

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

Field Detail

injector

private final InjectedValue<T> injector

Constructor Detail

ValueInjectionService

public ValueInjectionService()

Method Detail

start

public void start(StartContext context)
           throws StartException

Start the service. Do not return until the service has been fully started, unless an asynchronous service start is performed. All injections will be complete before this method is called.

If the service start involves any activities that may block, the asynchronous mechanism provided by the context should be used. See the class javadoc for details.

Specified by:

start in interface Service<T>

Parameters:

context - the context which can be used to trigger an asynchronous service start

Throws:

StartException - if the service could not be started for some reason

stop

public void stop(StopContext context)

Stop the service. Do not return until the service has been fully stopped, unless an asynchronous service stop is performed. All injections will remain intact until the service is fully stopped. This method should not throw an exception.

If the service start involves any activities that may block, the asynchronous mechanism provided by the context should be used. See the class javadoc for details.

Specified by:

stop in interface Service<T>

Parameters:

context - the context which can be used to trigger an asynchronous service stop

getValue

public T getValue()
           throws java.lang.IllegalStateException,
                  java.lang.IllegalArgumentException

Get the actual value.

Specified by:

getValue in interface Value<T>

Returns:

the actual value

Throws:

java.lang.IllegalStateException - if the value is time-sensitive and the current state does not allow retrieval.

java.lang.IllegalArgumentException - when the value cannot be read due to misconfiguration

getInjector

public Injector<T> getInjector()

Get the injector, which should be used to inject the dependency.

Returns:

the injector