| package org.apache.qpid.server.queue; |
| /* |
| * |
| * 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. |
| * |
| */ |
| |
| |
| import org.apache.log4j.Logger; |
| |
| import org.apache.qpid.AMQException; |
| import org.apache.qpid.server.logging.actors.CurrentActor; |
| import org.apache.qpid.server.subscription.Subscription; |
| import org.apache.qpid.transport.TransportException; |
| |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| |
| class SubFlushRunner implements Runnable |
| { |
| private static final Logger _logger = Logger.getLogger(SubFlushRunner.class); |
| |
| |
| private final Subscription _sub; |
| |
| private static int IDLE = 0; |
| private static int SCHEDULED = 1; |
| private static int RUNNING = 2; |
| |
| |
| private final AtomicInteger _scheduled = new AtomicInteger(IDLE); |
| |
| |
| private static final long ITERATIONS = SimpleAMQQueue.MAX_ASYNC_DELIVERIES; |
| private final AtomicBoolean _stateChange = new AtomicBoolean(); |
| |
| public SubFlushRunner(Subscription sub) |
| { |
| _sub = sub; |
| } |
| |
| public void run() |
| { |
| if(_scheduled.compareAndSet(SCHEDULED, RUNNING)) |
| { |
| boolean complete = false; |
| _stateChange.set(false); |
| try |
| { |
| CurrentActor.set(_sub.getLogActor()); |
| complete = getQueue().flushSubscription(_sub, ITERATIONS); |
| } |
| catch (AMQException e) |
| { |
| _logger.error("Exception during asynchronous delivery by " + toString(), e); |
| } |
| catch (final TransportException transe) |
| { |
| final String errorMessage = "Problem during asynchronous delivery by " + toString(); |
| if(_logger.isDebugEnabled()) |
| { |
| _logger.debug(errorMessage, transe); |
| } |
| else |
| { |
| _logger.info(errorMessage + ' ' + transe.getMessage()); |
| } |
| } |
| finally |
| { |
| CurrentActor.remove(); |
| _scheduled.compareAndSet(RUNNING, IDLE); |
| if ((!complete || _stateChange.compareAndSet(true,false))&& !_sub.isSuspended()) |
| { |
| if(_scheduled.compareAndSet(IDLE,SCHEDULED)) |
| { |
| getQueue().execute(this); |
| } |
| } |
| } |
| } |
| } |
| |
| private SimpleAMQQueue getQueue() |
| { |
| return (SimpleAMQQueue) _sub.getQueue(); |
| } |
| |
| public String toString() |
| { |
| return "SubFlushRunner-" + _sub.getLogActor(); |
| } |
| |
| public void execute(Executor executor) |
| { |
| _stateChange.set(true); |
| if(_scheduled.compareAndSet(IDLE,SCHEDULED)) |
| { |
| executor.execute(this); |
| } |
| } |
| } |