001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *      http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.oozie.client.event.jms;
019    
020    import org.codehaus.jackson.map.DeserializationConfig;
021    import org.codehaus.jackson.map.ObjectMapper;
022    
023    
024    /**
025     * Message deserializer to convert from JSON to java object
026     */
027    public class JSONMessageDeserializer extends MessageDeserializer {
028    
029        static ObjectMapper mapper = new ObjectMapper(); // Thread-safe.
030    
031        static {
032            mapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
033        }
034    
035        @Override
036        public <T> T getDeserializedObject(String messageBody, Class<T> clazz) {
037            try {
038                return mapper.readValue(messageBody, clazz);
039            }
040            catch (Exception exception) {
041                throw new IllegalArgumentException("Could not deserialize the JMS message using "
042                        + clazz.getCanonicalName(), exception);
043            }
044        }
045    }