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 */
017package org.apache.activemq.camel.component.broker;
018
019import java.util.Map;
020
021import org.apache.activemq.broker.ProducerBrokerExchange;
022import org.apache.activemq.command.ActiveMQMessage;
023import org.apache.camel.AsyncCallback;
024import org.apache.camel.Exchange;
025import org.apache.camel.Message;
026import org.apache.camel.component.jms.JmsMessage;
027import org.apache.camel.converter.ObjectConverter;
028import org.apache.camel.impl.DefaultAsyncProducer;
029
030public class BrokerProducer extends DefaultAsyncProducer {
031    private final BrokerEndpoint brokerEndpoint;
032
033    public BrokerProducer(BrokerEndpoint endpoint) {
034        super(endpoint);
035        brokerEndpoint = endpoint;
036    }
037
038    @Override
039    public boolean process(Exchange exchange, AsyncCallback callback) {
040        try {
041            //In the middle of the broker - InOut doesn't make any sense
042            //so we do in only
043            return processInOnly(exchange, callback);
044        } catch (Throwable e) {
045            // must catch exception to ensure callback is invoked as expected
046            // to let Camel error handling deal with this
047            exchange.setException(e);
048            callback.done(true);
049            return true;
050        }
051    }
052
053    protected boolean processInOnly(final Exchange exchange, final AsyncCallback callback) {
054        try {
055            ActiveMQMessage message = getMessage(exchange);
056            if (message != null) {
057                message.setDestination(brokerEndpoint.getDestination());
058                //if the ProducerBrokerExchange is null the broker will create it
059                ProducerBrokerExchange producerBrokerExchange = (ProducerBrokerExchange) exchange.getProperty(BrokerEndpoint.PRODUCER_BROKER_EXCHANGE);
060
061                brokerEndpoint.inject(producerBrokerExchange, message);
062            }
063        } catch (Exception e) {
064            exchange.setException(e);
065        }
066        callback.done(true);
067        return true;
068    }
069
070    private ActiveMQMessage getMessage(Exchange exchange) throws Exception {
071        ActiveMQMessage result;
072        Message camelMessage;
073        if (exchange.hasOut()) {
074            camelMessage = exchange.getOut();
075        } else {
076            camelMessage = exchange.getIn();
077        }
078
079        Map<String, Object> headers = camelMessage.getHeaders();
080
081        /**
082         * We purposely don't want to support injecting messages half-way through
083         * broker processing - use the activemq camel component for that - but
084         * we will support changing message headers and destinations
085         */
086        if (camelMessage instanceof JmsMessage) {
087            JmsMessage jmsMessage = (JmsMessage) camelMessage;
088            if (jmsMessage.getJmsMessage() instanceof ActiveMQMessage) {
089                result = (ActiveMQMessage) jmsMessage.getJmsMessage();
090                //lets apply any new message headers
091                setJmsHeaders(result, headers);
092            } else {
093                throw new IllegalStateException("Not the original message from the broker " + jmsMessage.getJmsMessage());
094            }
095        } else {
096            throw new IllegalStateException("Not the original message from the broker " + camelMessage);
097        }
098
099        return result;
100    }
101
102    private void setJmsHeaders(ActiveMQMessage message, Map<String, Object> headers) {
103        message.setReadOnlyProperties(false);
104        for (Map.Entry<String, Object> entry : headers.entrySet()) {
105            if (entry.getKey().equalsIgnoreCase("JMSDeliveryMode")) {
106                Object value = entry.getValue();
107                if (value instanceof Number) {
108                    Number number = (Number) value;
109                    message.setJMSDeliveryMode(number.intValue());
110                }
111            }
112            if (entry.getKey().equalsIgnoreCase("JmsPriority")) {
113                Integer value = ObjectConverter.toInteger(entry.getValue());
114                if (value != null) {
115                    message.setJMSPriority(value.intValue());
116                }
117            }
118            if (entry.getKey().equalsIgnoreCase("JMSTimestamp")) {
119                Long value = ObjectConverter.toLong(entry.getValue());
120                if (value != null) {
121                    message.setJMSTimestamp(value.longValue());
122                }
123            }
124            if (entry.getKey().equalsIgnoreCase("JMSExpiration")) {
125                Long value = ObjectConverter.toLong(entry.getValue());
126                if (value != null) {
127                    message.setJMSExpiration(value.longValue());
128                }
129            }
130            if (entry.getKey().equalsIgnoreCase("JMSRedelivered")) {
131                message.setJMSRedelivered(ObjectConverter.toBool(entry.getValue()));
132            }
133            if (entry.getKey().equalsIgnoreCase("JMSType")) {
134                Object value = entry.getValue();
135                if (value != null) {
136                    message.setJMSType(value.toString());
137                }
138            }
139        }
140    }
141
142}