001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.activemq.transport.http; 018 019 import java.io.IOException; 020 import java.util.Queue; 021 import java.util.concurrent.BlockingQueue; 022 import java.util.concurrent.TimeUnit; 023 024 import org.apache.activemq.transport.TransportSupport; 025 import org.apache.activemq.util.ServiceStopper; 026 027 /** 028 * A server side HTTP based TransportChannel which processes incoming packets 029 * and adds outgoing packets onto a {@link Queue} so that they can be dispatched 030 * by the HTTP GET requests from the client. 031 * 032 * @version $Revision$ 033 */ 034 public class BlockingQueueTransport extends TransportSupport { 035 public static final long MAX_TIMEOUT = 30000L; 036 037 private BlockingQueue<Object> queue; 038 039 public BlockingQueueTransport(BlockingQueue<Object> channel) { 040 this.queue = channel; 041 } 042 043 public BlockingQueue<Object> getQueue() { 044 return queue; 045 } 046 047 public void oneway(Object command) throws IOException { 048 try { 049 boolean success = queue.offer(command, MAX_TIMEOUT, TimeUnit.MILLISECONDS); 050 if (!success) { 051 throw new IOException("Fail to add to BlockingQueue. Add timed out after " + MAX_TIMEOUT + "ms: size=" + queue.size()); 052 } 053 } catch (InterruptedException e) { 054 throw new IOException("Fail to add to BlockingQueue. Interrupted while waiting for space: size=" + queue.size()); 055 } 056 } 057 058 059 public String getRemoteAddress() { 060 return "blockingQueue_" + queue.hashCode(); 061 } 062 063 protected void doStart() throws Exception { 064 } 065 066 protected void doStop(ServiceStopper stopper) throws Exception { 067 } 068 069 public int getReceiveCounter() { 070 return 0; 071 } 072 }