org.ow2.spec.ee.jpa
Class PersistenceProviderActivator

java.lang.Object
  org.ow2.spec.ee.jpa.PersistenceProviderActivator

All Implemented Interfaces:

EventListener, PersistenceProviderResolver, org.osgi.framework.BundleActivator, org.osgi.framework.ServiceListener

public class PersistenceProviderActivator
extends Object
implements org.osgi.framework.BundleActivator, PersistenceProviderResolver, org.osgi.framework.ServiceListener

OSGi activator for

Author:

Florent Benoit

Constructor Summary

PersistenceProviderActivator()
Default constructor.

Method Summary

void	clearCachedProviders() Clear cache of providers.
List<PersistenceProvider>	getPersistenceProviders() Returns a list of the PersistenceProvider implementations available in the runtime environment.
void	serviceChanged(org.osgi.framework.ServiceEvent event) Checks if there are persistence providers that are being registered/unregistered.
void	start(org.osgi.framework.BundleContext context) Called when this bundle is started so the Framework can perform the bundle-specific activities necessary to start this bundle.
void	stop(org.osgi.framework.BundleContext context) Called when this bundle is stopped so the Framework can perform the bundle-specific activities necessary to stop the bundle.

Methods inherited from class java.lang.Object

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

Constructor Detail

PersistenceProviderActivator

public PersistenceProviderActivator()

Default constructor.

Method Detail

start

public void start(org.osgi.framework.BundleContext context)
           throws Exception

Called when this bundle is started so the Framework can perform the bundle-specific activities necessary to start this bundle. This method can be used to register services or to allocate any resources that this bundle needs.

This method must complete and return to its caller in a timely manner.

Specified by:

start in interface org.osgi.framework.BundleActivator

Parameters:

context - The execution context of the bundle being started.

Throws:

Exception - If this method throws an exception, this bundle is marked as stopped and the Framework will remove this bundle's listeners, unregister all services registered by this bundle, and release all services used by this bundle.

stop

public void stop(org.osgi.framework.BundleContext context)
          throws Exception

Called when this bundle is stopped so the Framework can perform the bundle-specific activities necessary to stop the bundle. In general, this method should undo the work that the BundleActivator.start method started. There should be no active threads that were started by this bundle when this bundle returns. A stopped bundle must not call any Framework objects.

This method must complete and return to its caller in a timely manner.

Specified by:

stop in interface org.osgi.framework.BundleActivator

Parameters:

context - The execution context of the bundle being stopped.

Throws:

Exception - If this method throws an exception, the bundle is still marked as stopped, and the Framework will remove the bundle's listeners, unregister all services registered by the bundle, and release all services used by the bundle.

clearCachedProviders

public void clearCachedProviders()

Clear cache of providers.

Specified by:

clearCachedProviders in interface PersistenceProviderResolver

getPersistenceProviders

public List<PersistenceProvider> getPersistenceProviders()

Returns a list of the PersistenceProvider implementations available in the runtime environment.

Specified by:

getPersistenceProviders in interface PersistenceProviderResolver

Returns:

list of the persistence providers available in the environment

serviceChanged

public void serviceChanged(org.osgi.framework.ServiceEvent event)

Checks if there are persistence providers that are being registered/unregistered.

Specified by:

serviceChanged in interface org.osgi.framework.ServiceListener

Parameters:

event - The ServiceEvent object.