org.springframework.jms.support.converter
Class MarshallingMessageConverter

java.lang.Object
  org.springframework.jms.support.converter.MarshallingMessageConverter

All Implemented Interfaces:

InitializingBean, MessageConverter

public class MarshallingMessageConverter
extends Object
implements MessageConverter, InitializingBean

Spring JMS MessageConverter that uses a Marshaller and Unmarshaller. Marshals an object to a BytesMessage, or to a TextMessage if the marshalTo is set to MessageType.TEXT. Unmarshals from a TextMessage or BytesMessage to an object.

Since:

3.0

Author:

Arjen Poutsma, Juergen Hoeller

See Also:

JmsTemplate.convertAndSend(java.lang.Object), JmsTemplate.receiveAndConvert()

Constructor Summary

MarshallingMessageConverter()
Construct a new MarshallingMessageConverter with no Marshaller or Unmarshaller set.

MarshallingMessageConverter(Marshaller marshaller)
Construct a new MarshallingMessageConverter with the given Marshaller set.

MarshallingMessageConverter(Marshaller marshaller, Unmarshaller unmarshaller)
Construct a new MarshallingMessageConverter with the given Marshaller and Unmarshaller.

Method Summary

void	afterPropertiesSet() Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
Object	fromMessage(Message message) This implementation unmarshals the given Message into an object.
protected BytesMessage	marshalToBytesMessage(Object object, Session session, Marshaller marshaller) Marshal the given object to a BytesMessage.
protected Message	marshalToMessage(Object object, Session session, Marshaller marshaller, MessageType targetType) Template method that allows for custom message marshalling.
protected TextMessage	marshalToTextMessage(Object object, Session session, Marshaller marshaller) Marshal the given object to a TextMessage.
void	setMarshaller(Marshaller marshaller) Set the Marshaller to be used by this message converter.
void	setTargetType(MessageType targetType) Specify whether toMessage(Object, Session) should marshal to a BytesMessage or a TextMessage.
void	setUnmarshaller(Unmarshaller unmarshaller) Set the Unmarshaller to be used by this message converter.
Message	toMessage(Object object, Session session) This implementation marshals the given object to a TextMessage or BytesMessage.
protected Object	unmarshalFromBytesMessage(BytesMessage message, Unmarshaller unmarshaller) Unmarshal the given BytesMessage into an object.
protected Object	unmarshalFromMessage(Message message, Unmarshaller unmarshaller) Template method that allows for custom message unmarshalling.
protected Object	unmarshalFromTextMessage(TextMessage message, Unmarshaller unmarshaller) Unmarshal the given TextMessage into an object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MarshallingMessageConverter

public MarshallingMessageConverter()

Construct a new MarshallingMessageConverter with no Marshaller or Unmarshaller set. The marshaller must be set after construction by invoking setMarshaller(Marshaller) and setUnmarshaller(Unmarshaller) .

MarshallingMessageConverter

public MarshallingMessageConverter(Marshaller marshaller)

Construct a new MarshallingMessageConverter with the given Marshaller set.

If the given Marshaller also implements the Unmarshaller interface, it is used for both marshalling and unmarshalling. Otherwise, an exception is thrown.

Note that all Marshaller implementations in Spring also implement the Unmarshaller interface, so that you can safely use this constructor.

Parameters:

marshaller - object used as marshaller and unmarshaller

Throws:

IllegalArgumentException - when marshaller does not implement the Unmarshaller interface as well

MarshallingMessageConverter

public MarshallingMessageConverter(Marshaller marshaller,
                                   Unmarshaller unmarshaller)

Construct a new MarshallingMessageConverter with the given Marshaller and Unmarshaller.

Parameters:

marshaller - the Marshaller to use

unmarshaller - the Unmarshaller to use

Method Detail

setMarshaller

public void setMarshaller(Marshaller marshaller)

Set the Marshaller to be used by this message converter.

setUnmarshaller

public void setUnmarshaller(Unmarshaller unmarshaller)

Set the Unmarshaller to be used by this message converter.

setTargetType

public void setTargetType(MessageType targetType)

Specify whether toMessage(Object, Session) should marshal to a BytesMessage or a TextMessage.

The default is MessageType.BYTES, i.e. this converter marshals to a BytesMessage. Note that the default version of this converter supports MessageType.BYTES and MessageType.TEXT only.

See Also:

MessageType.BYTES, MessageType.TEXT

afterPropertiesSet

public void afterPropertiesSet()

Description copied from interface: InitializingBean

Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

Specified by:

afterPropertiesSet in interface InitializingBean

toMessage

public Message toMessage(Object object,
                         Session session)
                  throws JMSException,
                         MessageConversionException

This implementation marshals the given object to a TextMessage or BytesMessage. The desired message type can be defined by setting the "marshalTo" property.

Specified by:

toMessage in interface MessageConverter

Parameters:

object - the object to convert

session - the Session to use for creating a JMS Message

Returns:

the JMS Message

Throws:

JMSException - if thrown by JMS API methods

MessageConversionException - in case of conversion failure

See Also:

marshalToTextMessage(java.lang.Object, javax.jms.Session, org.springframework.oxm.Marshaller), marshalToBytesMessage(java.lang.Object, javax.jms.Session, org.springframework.oxm.Marshaller)

fromMessage

public Object fromMessage(Message message)
                   throws JMSException,
                          MessageConversionException

This implementation unmarshals the given Message into an object.

Specified by:

fromMessage in interface MessageConverter

Parameters:

message - the message to convert

Returns:

the converted Java object

Throws:

JMSException - if thrown by JMS API methods

MessageConversionException - in case of conversion failure

See Also:

unmarshalFromTextMessage(javax.jms.TextMessage, org.springframework.oxm.Unmarshaller), unmarshalFromBytesMessage(javax.jms.BytesMessage, org.springframework.oxm.Unmarshaller)

marshalToTextMessage

protected TextMessage marshalToTextMessage(Object object,
                                           Session session,
                                           Marshaller marshaller)
                                    throws JMSException,
                                           IOException,
                                           XmlMappingException

Marshal the given object to a TextMessage.

Parameters:

object - the object to be marshalled

session - current JMS session

marshaller - the marshaller to use

Returns:

the resulting message

Throws:

JMSException - if thrown by JMS methods

IOException - in case of I/O errors

XmlMappingException - in case of OXM mapping errors

See Also:

Session.createTextMessage(), Marshaller.marshal(Object, Result)

marshalToBytesMessage

protected BytesMessage marshalToBytesMessage(Object object,
                                             Session session,
                                             Marshaller marshaller)
                                      throws JMSException,
                                             IOException,
                                             XmlMappingException

Marshal the given object to a BytesMessage.

Parameters:

object - the object to be marshalled

session - current JMS session

marshaller - the marshaller to use

Returns:

the resulting message

Throws:

JMSException - if thrown by JMS methods

IOException - in case of I/O errors

XmlMappingException - in case of OXM mapping errors

See Also:

Session.createBytesMessage(), Marshaller.marshal(Object, Result)

marshalToMessage

protected Message marshalToMessage(Object object,
                                   Session session,
                                   Marshaller marshaller,
                                   MessageType targetType)
                            throws JMSException,
                                   IOException,
                                   XmlMappingException

Template method that allows for custom message marshalling. Invoked when setTargetType(org.springframework.jms.support.converter.MessageType) is not MessageType.TEXT or MessageType.BYTES.

The default implementation throws an IllegalArgumentException.

Parameters:

object - the object to marshal

session - the JMS session

marshaller - the marshaller to use

targetType - the target message type (other than TEXT or BYTES)

Returns:

the resulting message

Throws:

JMSException - if thrown by JMS methods

IOException - in case of I/O errors

XmlMappingException - in case of OXM mapping errors

unmarshalFromTextMessage

protected Object unmarshalFromTextMessage(TextMessage message,
                                          Unmarshaller unmarshaller)
                                   throws JMSException,
                                          IOException,
                                          XmlMappingException

Unmarshal the given TextMessage into an object.

Parameters:

message - the message

unmarshaller - the unmarshaller to use

Returns:

the unmarshalled object

Throws:

JMSException - if thrown by JMS methods

IOException - in case of I/O errors

XmlMappingException - in case of OXM mapping errors

See Also:

Unmarshaller.unmarshal(Source)

unmarshalFromBytesMessage

protected Object unmarshalFromBytesMessage(BytesMessage message,
                                           Unmarshaller unmarshaller)
                                    throws JMSException,
                                           IOException,
                                           XmlMappingException

Unmarshal the given BytesMessage into an object.

Parameters:

message - the message

unmarshaller - the unmarshaller to use

Returns:

the unmarshalled object

Throws:

JMSException - if thrown by JMS methods

IOException - in case of I/O errors

XmlMappingException - in case of OXM mapping errors

See Also:

Unmarshaller.unmarshal(Source)

unmarshalFromMessage

protected Object unmarshalFromMessage(Message message,
                                      Unmarshaller unmarshaller)
                               throws JMSException,
                                      IOException,
                                      XmlMappingException

Template method that allows for custom message unmarshalling. Invoked when fromMessage(Message) is invoked with a message that is not a TextMessage or BytesMessage.

The default implemenetation throws an IllegalArgumentException.

Parameters:

message - the message

unmarshaller - the unmarshaller to use

Returns:

the unmarshalled object

Throws:

JMSException - if thrown by JMS methods

IOException - in case of I/O errors

XmlMappingException - in case of OXM mapping errors