org.jboss.txbridge.ba.execute
Class ServiceLocator

java.lang.Object
  org.jboss.txbridge.ba.execute.ServiceLocator

public class ServiceLocator
extends java.lang.Object

The Service Locator component is responsible for locating EJBs. It uses a caching mechanism so that if an EJB has been previously searched for a cached reference can be returned. Based on: http://java.sun.com/blueprints/patterns/ServiceLocator.html

Version:

0.1

Author:

Maciej P. Machulak (mmachulak@redhat.com)

Field Summary

private java.util.concurrent.ConcurrentMap<java.lang.String,java.lang.Object>	beanCache
private javax.naming.InitialContext	initialContext
private static ServiceLocator	localServiceLocator
private static org.apache.log4j.Logger	log
private static java.util.concurrent.ConcurrentMap<java.lang.String,ServiceLocator>	serviceLocators

Constructor Summary

private	ServiceLocator() Constructor
private	ServiceLocator(java.lang.String providerURL) Constructor

Method Summary

static ServiceLocator	getInstance(java.lang.String providerURL) Returns the instance of the Service Locator object.
java.lang.Object	getInterface(java.lang.String jndiName, java.lang.Class interfaceName) This method returns a reference to the interface of an EJB.

Methods inherited from class java.lang.Object

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

Field Detail

log

private static org.apache.log4j.Logger log

initialContext

private javax.naming.InitialContext initialContext

beanCache

private java.util.concurrent.ConcurrentMap<java.lang.String,java.lang.Object> beanCache

localServiceLocator

private static ServiceLocator localServiceLocator

serviceLocators

private static java.util.concurrent.ConcurrentMap<java.lang.String,ServiceLocator> serviceLocators

Constructor Detail

ServiceLocator

private ServiceLocator()
                throws javax.naming.NamingException

Constructor

Throws:

javax.naming.NamingException - if there was a naming error.

ServiceLocator

private ServiceLocator(java.lang.String providerURL)
                throws javax.naming.NamingException

Constructor

Parameters:

providerURL - is the URL of the provider.

Throws:

javax.naming.NamingException - if there was a naming error.

Method Detail

getInstance

public static ServiceLocator getInstance(java.lang.String providerURL)
                                  throws ServiceLocatorException

Returns the instance of the Service Locator object.

Parameters:

providerURL - is the Provider URL

Returns:

the instance of the Service Locator object.

Throws:

ServiceLocatorException - if it was not possible to create the service locator.

getInterface

public java.lang.Object getInterface(java.lang.String jndiName,
                                     java.lang.Class interfaceName)
                              throws ServiceLocatorException

This method returns a reference to the interface of an EJB.

Parameters:

jndiName - is the name of the bean.

interfaceName - is the class of the remote interface.

Returns:

an object representing an interface of a bean.

Throws:

ServiceLocatorException - if there was an error with the lookup.