org.jboss.shrinkwrap.resolver.spi.loader

Class SpiServiceLoader

java.lang.Object

org.jboss.shrinkwrap.resolver.spi.loader.SpiServiceLoader

All Implemented Interfaces:

ServiceLoader

public class SpiServiceLoader
extends Object
implements ServiceLoader

A basic ServiceLoader implementation which uses META-INF/services registration. In order to register a service, create a file META-INF/services/${service.interface.name}. The content of the file should list fully qualified names of interface implementations, separated by new line character.

Author:

Aslak Knutsen, Karel Piwko, ALR

Constructor Summary

Constructors

Constructor and Description
SpiServiceLoader() Create an instance of SPI servicSe loader
SpiServiceLoader(ClassLoader classLoader) Creates an instance of SPI service loader.

Method Summary

Modifier and Type	Method and Description
<T> Collection<T>	all(Class<T> serviceClass) Loads all registered services for given serviceClass.
ClassLoader	getClassLoader()
<T> T	onlyOne(Class<T> serviceClass) Loads a registered service for given serviceClass.
<T> T	onlyOne(Class<T> serviceClass, Class<? extends T> defaultImplementationClass) Loads a registered service for given serviceClass.
void	setClassLoader(ClassLoader classLoader)

Methods inherited from class java.lang.Object

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

Constructor Detail

SpiServiceLoader

public SpiServiceLoader()

Create an instance of SPI servicSe loader

SpiServiceLoader

public SpiServiceLoader(ClassLoader classLoader)

Creates an instance of SPI service loader. Uses specific ClassLoader to load service implementations.

Parameters:

classLoader -

Method Detail

all

public <T> Collection<T> all(Class<T> serviceClass)

Description copied from interface: ServiceLoader

Loads all registered services for given serviceClass.

Specified by:

all in interface ServiceLoader

Parameters:

serviceClass - The service class.

Returns:

Collection of loaded services.

onlyOne

public <T> T onlyOne(Class<T> serviceClass)

Description copied from interface: ServiceLoader

Loads a registered service for given serviceClass.

Specified by:

onlyOne in interface ServiceLoader

Parameters:

serviceClass - The service class.

Returns:

The loaded service.

onlyOne

public <T> T onlyOne(Class<T> serviceClass,
                     Class<? extends T> defaultImplementationClass)

Description copied from interface: ServiceLoader

Loads a registered service for given serviceClass. Reverts to the defaultImplementationClass if no other service is registered. If defaultImplemenationClass is registered as well, it simply ignores it during resolution.

Specified by:

onlyOne in interface ServiceLoader

Parameters:

serviceClass - The service class.

defaultImplementationClass - The default implementation class.

Returns:

The loaded service.

getClassLoader

public ClassLoader getClassLoader()

setClassLoader

public void setClassLoader(ClassLoader classLoader)