runtime/org.argeo.slc.support.activemq/src/main/java/org/argeo/slc/jms/MarshallerMessageConverter.java

   1 package org.argeo.slc.jms;
   2
   3 import java.util.Enumeration;
   4
   5 import javax.jms.JMSException;
   6 import javax.jms.Message;
   7 import javax.jms.Session;
   8 import javax.jms.TextMessage;
   9
  10 import org.apache.commons.logging.Log;
  11 import org.apache.commons.logging.LogFactory;
  12 import org.argeo.slc.SlcException;
  13 import org.springframework.jms.support.converter.MessageConversionException;
  14 import org.springframework.jms.support.converter.MessageConverter;
  15 import org.springframework.oxm.Marshaller;
  16 import org.springframework.oxm.Unmarshaller;
  17 import org.springframework.xml.transform.StringResult;
  18 import org.springframework.xml.transform.StringSource;
  19
  20 public class MarshallerMessageConverter implements MessageConverter {
  21         private final static Log log = LogFactory
  22                         .getLog(MarshallerMessageConverter.class);
  23
  24         private Marshaller marshaller;
  25         private Unmarshaller unmarshaller;
  26
  27         public Object fromMessage(Message message) throws JMSException,
  28                         MessageConversionException {
  29                 if (log.isTraceEnabled()) {
  30                         Enumeration<String> names = message.getPropertyNames();
  31                         while (names.hasMoreElements()) {
  32                                 String name = names.nextElement();
  33                                 log.trace("JMS Property: " + name + "="
  34                                                 + message.getObjectProperty(name));
  35                         }
  36                 }
  37
  38                 if (message instanceof TextMessage) {
  39
  40                         String text = ((TextMessage) message).getText();
  41                         try {
  42                                 return unmarshaller.unmarshal(new StringSource(text));
  43                         } catch (Exception e) {
  44                                 throw new SlcException("Could not unmarshall " + text, e);
  45                         }
  46                 } else {
  47                         throw new SlcException("This type of messages is not supported: "
  48                                         + message);
  49                 }
  50         }
  51
  52         public Message toMessage(Object object, Session session)
  53                         throws JMSException, MessageConversionException {
  54                 StringResult result = new StringResult();
  55                 try {
  56                         marshaller.marshal(object, result);
  57                 } catch (Exception e) {
  58                         throw new SlcException("Could not marshall " + object, e);
  59                 }
  60                 TextMessage msg = session.createTextMessage();
  61                 msg.setText(result.toString());
  62                 return msg;
  63         }
  64
  65         public void setMarshaller(Marshaller marshaller) {
  66                 this.marshaller = marshaller;
  67         }
  68
  69         public void setUnmarshaller(Unmarshaller unmarshaller) {
  70                 this.unmarshaller = unmarshaller;
  71         }
  72
  73 }