package org.hornetq.rest.topic;
import org.hornetq.api.core.HornetQException;
import org.hornetq.api.core.SimpleString;
import org.hornetq.api.core.client.ClientSession;
import org.hornetq.api.core.client.ClientSessionFactory;
import org.hornetq.rest.HornetQRestLogger;
import org.hornetq.rest.queue.push.PushConsumer;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.core.UriInfo;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicLong;
/**
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 1 $
*/
public class PushSubscriptionsResource
{
protected Map<String, PushSubscription> consumers = new ConcurrentHashMap<String, PushSubscription>();
protected ClientSessionFactory sessionFactory;
protected String destination;
protected final String startup = Long.toString(System.currentTimeMillis());
protected final AtomicLong sessionCounter = new AtomicLong(1);
protected TopicPushStore pushStore;
public void stop()
{
for (PushConsumer consumer : consumers.values())
{
consumer.stop();
if (consumer.getRegistration().isDurable() == false)
{
deleteSubscriberQueue(consumer);
}
}
}
public TopicPushStore getPushStore()
{
return pushStore;
}
public void setPushStore(TopicPushStore pushStore)
{
this.pushStore = pushStore;
}
public ClientSession createSubscription(String subscriptionName, boolean durable)
{
ClientSession session = null;
try
{
session = sessionFactory.createSession();
if (durable)
{
session.createQueue(destination, subscriptionName, true);
}
else
{
session.createTemporaryQueue(destination, subscriptionName);
}
return session;
}
catch (HornetQException e)
{
throw new RuntimeException(e);
}
}
public void addRegistration(PushTopicRegistration reg) throws Exception
{
if (reg.isEnabled() == false) return;
String destination = reg.getDestination();
ClientSession session = sessionFactory.createSession(false, false, false);
ClientSession.QueueQuery query = session.queueQuery(new SimpleString(destination));
ClientSession createSession = null;
if (!query.isExists())
{
createSession = createSubscription(destination, reg.isDurable());
}
PushSubscription consumer = new PushSubscription(sessionFactory, reg.getDestination(), reg.getId(), reg, pushStore);
try
{
consumer.start();
}
catch (Exception e)
{
consumer.stop();
throw new Exception("Failed starting push subscriber for " + destination + " of push subscriber: " + reg.getTarget(), e);
}
finally
{
closeSession(createSession);
closeSession(session);
}
consumers.put(reg.getId(), consumer);
}
private void closeSession(ClientSession createSession)
{
if (createSession != null)
{
try
{
createSession.close();
}
catch (HornetQException e)
{
}
}
}
@POST
public Response create(@Context UriInfo uriInfo, PushTopicRegistration registration)
{
HornetQRestLogger.LOGGER.debug("Handling POST request for \"" + uriInfo.getPath() + "\"");
//System.out.println("PushRegistration: " + registration);
// todo put some logic here to check for duplicates
String genId = sessionCounter.getAndIncrement() + "-topic-" + destination + "-" + startup;
if (registration.getDestination() == null)
{
registration.setDestination(genId);
}
registration.setId(genId);
registration.setTopic(destination);
ClientSession createSession = createSubscription(genId, registration.isDurable());
try
{
PushSubscription consumer = new PushSubscription(sessionFactory, genId, genId, registration, pushStore);
try
{
consumer.start();
if (registration.isDurable() && pushStore != null)
{
pushStore.add(registration);
}
}
catch (Exception e)
{
consumer.stop();
throw new WebApplicationException(e, Response.serverError().entity("Failed to start consumer.").type("text/plain").build());
}
consumers.put(genId, consumer);
UriBuilder location = uriInfo.getAbsolutePathBuilder();
location.path(genId);
return Response.created(location.build()).build();
}
finally
{
closeSession(createSession);
}
}
@GET
@Path("{consumer-id}")
@Produces("application/xml")
public PushTopicRegistration getConsumer(@Context UriInfo uriInfo, @PathParam("consumer-id") String consumerId)
{
HornetQRestLogger.LOGGER.debug("Handling GET request for \"" + uriInfo.getPath() + "\"");
PushConsumer consumer = consumers.get(consumerId);
if (consumer == null)
{
throw new WebApplicationException(Response.status(404).entity("Could not find consumer.").type("text/plain").build());
}
return (PushTopicRegistration) consumer.getRegistration();
}
@DELETE
@Path("{consumer-id}")
public void deleteConsumer(@Context UriInfo uriInfo, @PathParam("consumer-id") String consumerId)
{
HornetQRestLogger.LOGGER.debug("Handling DELETE request for \"" + uriInfo.getPath() + "\"");
PushConsumer consumer = consumers.remove(consumerId);
if (consumer == null)
{
throw new WebApplicationException(Response.status(404).entity("Could not find consumer.").type("text/plain").build());
}
consumer.stop();
deleteSubscriberQueue(consumer);
}
public Map<String, PushSubscription> getConsumers()
{
return consumers;
}
public ClientSessionFactory getSessionFactory()
{
return sessionFactory;
}
public void setSessionFactory(ClientSessionFactory sessionFactory)
{
this.sessionFactory = sessionFactory;
}
public String getDestination()
{
return destination;
}
public void setDestination(String destination)
{
this.destination = destination;
}
private void deleteSubscriberQueue(PushConsumer consumer)
{
String subscriptionName = consumer.getDestination();
ClientSession session = null;
try
{
session = sessionFactory.createSession();
session.deleteQueue(subscriptionName);
}
catch (HornetQException e)
{
}
finally
{
closeSession(session);
}
}
}