org.josef.ejb

Class ServiceLocator

java.lang.Object

org.josef.ejb.ServiceLocator

@Status(stage=TEST,
        unitTests=PARTIAL)
public class ServiceLocator
extends Object

Service Locator that, as its name implies, locates services.

Version:

1.0 $Revision: 6488 $

Author:

Kees Schotanus

Constructor Summary

Constructors

Constructor and Description
ServiceLocator()

Method Summary

Modifier and Type	Method and Description
<T> T	lookup(Class<T> classToLookup) Performs a lookup of the service identified by the name of the supplied classToLookup.
static UserTransaction	lookupUserTransaction(Context context) Looks up the current user transaction.

Methods inherited from class java.lang.Object

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

Constructor Detail

ServiceLocator

public ServiceLocator()

Method Detail

lookup

public <T> T lookup(Class<T> classToLookup)

Performs a lookup of the service identified by the name of the supplied classToLookup.
This method only performs an expensive lookup when the service can not be found in its cache.

Type Parameters:

T - The type of the service to lookup.

Parameters:

classToLookup - The class of the service to lookup.

Returns:

The service identified by the name of the supplied classToLookup.

Throws:

ServiceLocatorException - When the service could not be located.

lookupUserTransaction

public static UserTransaction lookupUserTransaction(Context context)
                                             throws NamingException

Looks up the current user transaction.
Since transactions are quite volatile, the transaction is never cached.

Parameters:

context - The JNDI Context to use for the lookup.

Returns:

User transaction object.

Throws:

NamingException - When the transaction could not be looked up.

NullPointerException - When the supplied context is null.