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.stomp; 018 019 import java.io.IOException; 020 021 import javax.jms.JMSException; 022 023 import org.apache.activemq.command.ConsumerInfo; 024 import org.apache.activemq.command.MessageAck; 025 import org.apache.activemq.command.MessageDispatch; 026 import org.apache.activemq.command.TransactionId; 027 028 public class StompQueueBrowserSubscription extends StompSubscription { 029 030 public StompQueueBrowserSubscription(ProtocolConverter stompTransport, String subscriptionId, ConsumerInfo consumerInfo, String transformation) { 031 super(stompTransport, subscriptionId, consumerInfo, transformation); 032 } 033 034 @Override 035 void onMessageDispatch(MessageDispatch md) throws IOException, JMSException { 036 037 if (md.getMessage() != null) { 038 super.onMessageDispatch(md); 039 } else { 040 StompFrame browseDone = new StompFrame(Stomp.Responses.MESSAGE); 041 browseDone.getHeaders().put(Stomp.Headers.Message.SUBSCRIPTION, this.getSubscriptionId()); 042 browseDone.getHeaders().put(Stomp.Headers.Message.BROWSER, "end"); 043 browseDone.getHeaders().put(Stomp.Headers.Message.DESTINATION, 044 protocolConverter.findTranslator(null).convertDestination(protocolConverter, this.destination)); 045 browseDone.getHeaders().put(Stomp.Headers.Message.MESSAGE_ID, "0"); 046 047 protocolConverter.sendToStomp(browseDone); 048 } 049 } 050 051 @Override 052 public MessageAck onStompMessageNack(String messageId, TransactionId transactionId) throws ProtocolException { 053 throw new ProtocolException("Cannot Nack a message on a Queue Browser Subscription."); 054 } 055 056 }