Module jakarta.messaging

Package jakarta.jms

Interface ObjectMessage

All Superinterfaces:

Message

public interface ObjectMessage
extends Message

An ObjectMessage object is used to send a message that contains a serializable object in the Java programming language ("Java object"). It inherits from the Message interface and adds a body containing a single reference to an object. Only Serializable Java objects can be used.

If a collection of Java objects must be sent, one of the Collection classes provided since JDK 1.2 can be used.

When a client receives an ObjectMessage, it is in read-only mode. If a client attempts to write to the message at this point, a MessageNotWriteableException is thrown. If clearBody is called, the message can now be both read from and written to.

Since:

JMS 1.0

Version:

Jakarta Messaging 2.0

See Also:

• Session.createObjectMessage()
• Session.createObjectMessage(Serializable)
• BytesMessage
• MapMessage
• Message
• StreamMessage
• TextMessage

Field Summary

Fields inherited from interface jakarta.jms.Message

DEFAULT_DELIVERY_DELAY, DEFAULT_DELIVERY_MODE, DEFAULT_PRIORITY, DEFAULT_TIME_TO_LIVE

Method Summary

Modifier and Type	Method	Description
Serializable	getObject()	Gets the serializable object containing this message's data.
void	setObject(Serializable object)	Sets the serializable object containing this message's data.

Methods inherited from interface jakarta.jms.Message

acknowledge, clearBody, clearProperties, getBody, getBooleanProperty, getByteProperty, getDoubleProperty, getFloatProperty, getIntProperty, getJMSCorrelationID, getJMSCorrelationIDAsBytes, getJMSDeliveryMode, getJMSDeliveryTime, getJMSDestination, getJMSExpiration, getJMSMessageID, getJMSPriority, getJMSRedelivered, getJMSReplyTo, getJMSTimestamp, getJMSType, getLongProperty, getObjectProperty, getPropertyNames, getShortProperty, getStringProperty, isBodyAssignableTo, propertyExists, setBooleanProperty, setByteProperty, setDoubleProperty, setFloatProperty, setIntProperty, setJMSCorrelationID, setJMSCorrelationIDAsBytes, setJMSDeliveryMode, setJMSDeliveryTime, setJMSDestination, setJMSExpiration, setJMSMessageID, setJMSPriority, setJMSRedelivered, setJMSReplyTo, setJMSTimestamp, setJMSType, setLongProperty, setObjectProperty, setShortProperty, setStringProperty

Method Details

setObject

void setObject(Serializable object)
        throws JMSException

Sets the serializable object containing this message's data. It is important to note that an ObjectMessage contains a snapshot of the object at the time setObject() is called; subsequent modifications of the object will have no effect on the ObjectMessage body.

Parameters:

object - the message's data

Throws:

JMSException - if the Jakarta Messaging provider fails to set the object due to some internal error.

MessageFormatException - if object serialization fails.

MessageNotWriteableException - if the message is in read-only mode.

getObject

Serializable getObject()
                throws JMSException

Gets the serializable object containing this message's data. The default value is null.

Returns:

the serializable object containing this message's data

Throws:

JMSException - if the Jakarta Messaging provider fails to get the object due to some internal error.

MessageFormatException - if object deserialization fails.