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.camel.component.hawtdb;
018    
019    import java.io.IOException;
020    import java.io.Serializable;
021    
022    import org.apache.camel.CamelContext;
023    import org.apache.camel.Endpoint;
024    import org.apache.camel.Exchange;
025    import org.apache.camel.impl.DefaultExchange;
026    import org.apache.camel.impl.DefaultExchangeHolder;
027    import org.fusesource.hawtbuf.Buffer;
028    import org.fusesource.hawtbuf.DataByteArrayInputStream;
029    import org.fusesource.hawtbuf.DataByteArrayOutputStream;
030    import org.fusesource.hawtbuf.codec.Codec;
031    import org.fusesource.hawtbuf.codec.ObjectCodec;
032    import org.fusesource.hawtbuf.codec.StringCodec;
033    
034    /**
035     * @version $Revision: 20171 $
036     */
037    public final class HawtDBCamelCodec {
038    
039        private Codec<String> keyCodec = new StringCodec();
040        private Codec<DefaultExchangeHolder> exchangeCodec = new ObjectCodec<DefaultExchangeHolder>();
041    
042        public Buffer marshallKey(String key) throws IOException {
043            DataByteArrayOutputStream baos = new DataByteArrayOutputStream();
044            keyCodec.encode(key, baos);
045            return baos.toBuffer();
046        }
047    
048        public String unmarshallKey(Buffer buffer) throws IOException {
049            DataByteArrayInputStream bais = new DataByteArrayInputStream(buffer);
050            String key = keyCodec.decode(bais);
051            return key;
052        }
053    
054        public Buffer marshallExchange(CamelContext camelContext, Exchange exchange) throws IOException {
055            DataByteArrayOutputStream baos = new DataByteArrayOutputStream();
056            // use DefaultExchangeHolder to marshal to a serialized object
057            DefaultExchangeHolder pe = DefaultExchangeHolder.marshal(exchange, false);
058            // add the aggregated size property as the only property we want to retain
059            DefaultExchangeHolder.addProperty(pe, Exchange.AGGREGATED_SIZE, exchange.getProperty(Exchange.AGGREGATED_SIZE, Integer.class));
060            // add the aggregated completed by property to retain
061            DefaultExchangeHolder.addProperty(pe, Exchange.AGGREGATED_COMPLETED_BY, exchange.getProperty(Exchange.AGGREGATED_COMPLETED_BY, String.class));
062            // add the aggregated correlation key property to retain
063            DefaultExchangeHolder.addProperty(pe, Exchange.AGGREGATED_CORRELATION_KEY, exchange.getProperty(Exchange.AGGREGATED_CORRELATION_KEY, String.class));
064            // persist the from endpoint as well
065            if (exchange.getFromEndpoint() != null) {
066                DefaultExchangeHolder.addProperty(pe, "CamelAggregatedFromEndpoint", exchange.getFromEndpoint().getEndpointUri());
067            }
068            exchangeCodec.encode(pe, baos);
069            return baos.toBuffer();
070        }
071    
072        public Exchange unmarshallExchange(CamelContext camelContext, Buffer buffer) throws IOException {
073            DataByteArrayInputStream bais = new DataByteArrayInputStream(buffer);
074            DefaultExchangeHolder pe = exchangeCodec.decode(bais);
075            Exchange answer = new DefaultExchange(camelContext);
076            DefaultExchangeHolder.unmarshal(answer, pe);
077            // restore the from endpoint
078            String fromEndpointUri = (String) answer.removeProperty("CamelAggregatedFromEndpoint");
079            if (fromEndpointUri != null) {
080                Endpoint fromEndpoint = camelContext.hasEndpoint(fromEndpointUri);
081                if (fromEndpoint != null) {
082                    answer.setFromEndpoint(fromEndpoint);
083                }
084            }
085            return answer;
086        }
087    
088    }