loci.common.services

Class ServiceFactory

java.lang.Object

loci.common.services.ServiceFactory

public class ServiceFactory
extends Object

Runtime instantiation of services.

Field Summary

Fields

Modifier and Type	Field and Description
private static Map<Class<? extends Service>,Constructor<? extends Service>>	constructorCache Constructor cache.
private static String	DEFAULT_PROPERTIES_FILE Default service properties file.
private static ServiceFactory	defaultFactory Default service factory.
private static org.slf4j.Logger	LOGGER Logger for this class.
private Map<Class<? extends Service>,Class<? extends Service>>	services Set of available services.

Constructor Summary

Constructors

Constructor and Description
ServiceFactory() Constructor loading service configuration from the default location.
ServiceFactory(String path) Constructor loading service configuration from a given location.

Method Summary

Methods

Modifier and Type	Method and Description
private <T extends Service> Constructor<T>	getConstructor(Class<T> klass) Retrieves a constructor for a given class from the constructor cache if possible.
<T extends Service> T	getInstance(Class<T> type) Retrieves an instance of a given service.

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

private static final org.slf4j.Logger LOGGER

Logger for this class.

DEFAULT_PROPERTIES_FILE

private static final String DEFAULT_PROPERTIES_FILE

Default service properties file.

See Also:

Constant Field Values

constructorCache

private static Map<Class<? extends Service>,Constructor<? extends Service>> constructorCache

Constructor cache.

services

private Map<Class<? extends Service>,Class<? extends Service>> services

Set of available services.

defaultFactory

private static ServiceFactory defaultFactory

Default service factory.

Constructor Detail

ServiceFactory

public ServiceFactory()
               throws DependencyException

Constructor loading service configuration from the default location.

Throws:

DependencyException - If there is an error locating or reading from the default configuration location.

ServiceFactory

public ServiceFactory(String path)
               throws DependencyException

Constructor loading service configuration from a given location.

Parameters:

path - Location to load service configuration from.

Throws:

DependencyException - If there is an error locating or reading from path.

Method Detail

getInstance

public <T extends Service> T getInstance(Class<T> type)
                              throws DependencyException

Retrieves an instance of a given service.

Parameters:

type - Interface type of the service.

Returns:

A newly instantiated service.

Throws:

DependencyException - If there is an error instantiating the service instance requested.

getConstructor

private <T extends Service> Constructor<T> getConstructor(Class<T> klass)
                                               throws DependencyException

Retrieves a constructor for a given class from the constructor cache if possible.

Parameters:

klass - Class to retrieve a constructor for.

Returns:

See above.

Throws:

DependencyException - If there is an error retrieving the constructor.