| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.ode.jbi; |
| |
| |
| import java.util.Map; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.jbi.messaging.InOnly; |
| import javax.jbi.messaging.InOut; |
| import javax.jbi.messaging.MessagingException; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.ode.bpel.iapi.PartnerRoleMessageExchange; |
| import org.apache.ode.bpel.iapi.MessageExchange.FailureType; |
| |
| /** |
| * Asynchronous JBI service consumer |
| */ |
| class OdeConsumerAsync extends OdeConsumer { |
| private static final Log __log = LogFactory.getLog(OdeConsumerAsync.class); |
| |
| /** |
| * We create an executor to handle all the asynchronous invocations/timeouts. Note, we don't need a lot of threads |
| * here, the operations are all async, using single-thread executor avoids any possible problems in concurrent |
| * use of delivery channel. |
| * |
| * WARNING: Canceling tasks does not immediately release them, so we don't use the schedule-cancel pattern here. |
| */ |
| private ScheduledExecutorService _executor; |
| |
| private Map<String, Long> _mexTimeouts = new ConcurrentHashMap<String, Long>(); |
| |
| OdeConsumerAsync(OdeContext ode) { |
| super(ode); |
| _executor = Executors.newSingleThreadScheduledExecutor(); |
| _executor.scheduleWithFixedDelay(new MEXReaper(), _responseTimeout, _responseTimeout/10, TimeUnit.MILLISECONDS); |
| } |
| |
| @Override |
| protected void doSendOneWay(final PartnerRoleMessageExchange odeMex, final InOnly inonly) { |
| _executor.submit(new Runnable() { |
| public void run() { |
| try { |
| _outstandingExchanges.put(inonly.getExchangeId(), odeMex); |
| _ode.getChannel().send(inonly); |
| } catch (MessagingException e) { |
| String errmsg = "Error sending request-only message to JBI for ODE mex " + odeMex; |
| __log.error(errmsg, e); |
| } |
| } |
| }); |
| |
| } |
| |
| @Override |
| protected void doSendTwoWay(final PartnerRoleMessageExchange odeMex, final InOut inout) { |
| _executor.submit(new Runnable() { |
| public void run() { |
| try { |
| _outstandingExchanges.put(inout.getExchangeId(), odeMex); |
| _mexTimeouts.put(inout.getExchangeId(), System.currentTimeMillis()+_responseTimeout); |
| _ode.getChannel().send(inout); |
| } catch (MessagingException e) { |
| String errmsg = "Error sending request-only message to JBI for ODE mex " + odeMex; |
| __log.error(errmsg, e); |
| } |
| } |
| }); |
| |
| } |
| |
| protected void inOutDone(InOut inout) { |
| _mexTimeouts.remove(inout.getExchangeId()); |
| } |
| |
| private class MEXReaper implements Runnable { |
| public void run() { |
| long now = System.currentTimeMillis(); |
| Object[] inouts = _mexTimeouts.keySet().toArray(); |
| for (int i=0; i<inouts.length; i++) { |
| long timeout = _mexTimeouts.get(inouts[i]); |
| if (now >= timeout) { |
| _mexTimeouts.remove(inouts[i]); |
| final PartnerRoleMessageExchange pmex = _outstandingExchanges.remove(inouts[i]); |
| |
| if (pmex == null) /* no worries, got a response. */ |
| continue; |
| |
| __log.warn("Timeout on JBI message exchange " + inouts[i]); |
| try { |
| _ode._scheduler.execIsolatedTransaction(new Callable<Void>() { |
| public Void call() throws Exception { |
| pmex.replyWithFailure(FailureType.NO_RESPONSE, "Response not received after " + _responseTimeout + "ms.", null); |
| return null; |
| } |
| }); |
| } catch (Exception ex) { |
| __log.error("Error executing transaction: ", ex); |
| } |
| } |
| } |
| } |
| } |
| } |