org.apache.openjpa.event
Class JMSRemoteCommitProvider

java.lang.Object
  org.apache.openjpa.event.AbstractRemoteCommitProvider
      org.apache.openjpa.event.JMSRemoteCommitProvider

All Implemented Interfaces:

ExceptionListener, RemoteCommitProvider, Configurable, GenericConfigurable, Closeable

public class JMSRemoteCommitProvider
extends AbstractRemoteCommitProvider
implements Configurable, GenericConfigurable, ExceptionListener

JMS-based implementation of RemoteCommitProvider that listens for object modifications and propagates those changes to other RemoteCommitProviders over a JMS topic.

Since:

0.2.5.0

Author:

Patrick Linskey

Field Summary

Fields inherited from class org.apache.openjpa.event.AbstractRemoteCommitProvider

eventManager, log

Constructor Summary

JMSRemoteCommitProvider()

Method Summary

void	broadcast(RemoteCommitEvent event) Notifies other remote event managers in this JVM and on other machines of changes to the cache.
void	close() Free the resources used by this provider.
protected void	connect()
protected Message	createMessage(RemoteCommitEvent event) Returns a new Message to send to the topic.
void	endConfiguration() Subclasses that need to perform actions in Configurable.endConfiguration() must invoke this method.
protected MessageListener	getMessageListener()
protected Context	newContext() Returns a new Context object for use by this provider.
void	onException(JMSException ex)
void	setExceptionReconnectAttempts(int attempts) The number of times to attempt to reconnect after a JMS send exception is detected.
void	setInto(Options opts) Set a map of properties to pass to the InitialContext constructor for JNDI lookups.
void	setTopic(String name) Sets the JMS Topic name.
void	setTopicConnectionFactory(String name) Sets the JMS TopicConnectionFactory name.

Methods inherited from class org.apache.openjpa.event.AbstractRemoteCommitProvider

fireEvent, setConfiguration, setRemoteCommitEventManager, startConfiguration

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.openjpa.lib.conf.Configurable

setConfiguration, startConfiguration

Constructor Detail

JMSRemoteCommitProvider

public JMSRemoteCommitProvider()

Method Detail

setTopic

public void setTopic(String name)

Sets the JMS Topic name. Defaults to topic/OpenJPACommitProviderTopic.

setTopicConnectionFactory

public void setTopicConnectionFactory(String name)

Sets the JMS TopicConnectionFactory name. Defaults to java:/ConnectionFactory.

setExceptionReconnectAttempts

public void setExceptionReconnectAttempts(int attempts)

The number of times to attempt to reconnect after a JMS send exception is detected. Defaults to 0, meaning no attempt to reconnect is made; the exception is logged and ignored.

setInto

public void setInto(Options opts)

Set a map of properties to pass to the InitialContext constructor for JNDI lookups. Implementation of GenericConfigurable.

Specified by:

setInto in interface GenericConfigurable

newContext

protected Context newContext()
                      throws NamingException

Returns a new Context object for use by this provider.

Throws:

NamingException

broadcast

public void broadcast(RemoteCommitEvent event)

Description copied from interface: RemoteCommitProvider

Notifies other remote event managers in this JVM and on other machines of changes to the cache. This method must not notify the event manager associated with the broker that originated this commit.

Specified by:

broadcast in interface RemoteCommitProvider

close

public void close()

Description copied from interface: RemoteCommitProvider

Free the resources used by this provider.

Specified by:

close in interface RemoteCommitProvider

Specified by:

close in interface Closeable

endConfiguration

public void endConfiguration()

Subclasses that need to perform actions in Configurable.endConfiguration() must invoke this method.

Specified by:

endConfiguration in interface Configurable

Overrides:

endConfiguration in class AbstractRemoteCommitProvider

connect

protected void connect()

getMessageListener

protected MessageListener getMessageListener()

createMessage

protected Message createMessage(RemoteCommitEvent event)
                         throws JMSException

Returns a new Message to send to the topic. This implementation creates an ObjectMessage.

Throws:

JMSException

onException

public void onException(JMSException ex)

Specified by:

onException in interface ExceptionListener