Package org.apache.jena.base.module

Class SubsystemRegistryServiceLoader<T extends SubsystemLifecycle>

java.lang.Object

org.apache.jena.base.module.SubsystemRegistryServiceLoader<T>

All Implemented Interfaces:

SubsystemRegistry<T>

public class SubsystemRegistryServiceLoader<T extends SubsystemLifecycle>
extends Object
implements SubsystemRegistry<T>

Implementation of SubsystemRegistry for use in the simple but common case of running Jena as a collection of jars on the classpath.

Uses ServiceLoader to find sub-systems.

Constructor Summary

Constructors

Constructor	Description
SubsystemRegistryServiceLoader(Class<T> moduleClass)

Method Summary

Modifier and Type	Method	Description
void	add(T module)	Add to the collection.
boolean	isEmpty()
boolean	isRegistered(T module)	check whether registered
void	load()	Load - perform some kinds of search for SubsystemLifecycle implementations.
void	remove(T module)	Remove from the collection.
int	size()
List<T>	snapshot()	Return the registered items in a copied list.

Methods inherited from class java.lang.Object

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

Constructor Details

SubsystemRegistryServiceLoader

public SubsystemRegistryServiceLoader(Class<T> moduleClass)

Method Details

load

public void load()

Description copied from interface: SubsystemRegistry

Load - perform some kinds of search for SubsystemLifecycle implementations. This is called once in the initialization process.

The registry must load object of class T. If using the ServiceLoader, the registry implementation will need an object of Class<T>.

Specified by:

load in interface SubsystemRegistry<T extends SubsystemLifecycle>

add

public void add(T module)

Description copied from interface: SubsystemRegistry

Add to the collection.

Specified by:

add in interface SubsystemRegistry<T extends SubsystemLifecycle>

isRegistered

public boolean isRegistered(T module)

Description copied from interface: SubsystemRegistry

check whether registered

Specified by:

isRegistered in interface SubsystemRegistry<T extends SubsystemLifecycle>

remove

public void remove(T module)

Description copied from interface: SubsystemRegistry

Remove from the collection.

Specified by:

remove in interface SubsystemRegistry<T extends SubsystemLifecycle>

size

public int size()

Specified by:

size in interface SubsystemRegistry<T extends SubsystemLifecycle>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface SubsystemRegistry<T extends SubsystemLifecycle>

snapshot

public List<T> snapshot()

Description copied from interface: SubsystemRegistry

Return the registered items in a copied list. The list is detached from the registry and the caller can mutate it. There is no specific ordering requirement.

Specified by:

snapshot in interface SubsystemRegistry<T extends SubsystemLifecycle>