public abstract class MessageTransformer<T,S> extends Object
import java.util.*; import javax.jms.*; import com.sun.messaging.bridge.api.MessageTransformer; public class MessageTran extends MessageTransformer <Message, Message> { public Message transform(Message message, boolean readOnly, String charsetName, String source, String target, Properties properties) throws Exception { Message m = message; if (source.equals(STOMP)) { //from STOMP client to Java Message Queue //convert any invalid headers from STOMP SEND frame if (properties != null) { ...... //convert key to valid JMS message property name, then call m.setStringProperty() ...... } } else if (source.equals(SUN_MQ)) { //from Java Message Queue to STOMP client if (message instanceof ObjectMessage) { //create a new BytesMessage for message to be transformed to BytesMessage bm = (BytesMessage)createJMSMessage(JMSMessageType.BYTESMESSAGE); //convert message to the BytesMessage ...... m = bm; } else { .... } } return m; }
Modifier and Type | Class and Description |
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static class |
MessageTransformer.JMSMessageType |
Modifier and Type | Field and Description |
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static String |
STOMP
The predefined provider name for JMS message to/from STOMP client
|
static String |
SUN_MQ
The predefined provider name for JMS message to/from Sun Java Message Queue
|
Constructor and Description |
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MessageTransformer() |
Modifier and Type | Method and Description |
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protected void |
branchTo(Object d)
To be called from the transform() method when needs to tell the bridge to
branch the message that is to be returned by the transform() call to a
different destination in the target provider
|
protected Message |
createJMSMessage(MessageTransformer.JMSMessageType type)
Create a JMS message object.
|
protected Queue |
createQueue(String queueName)
To be called from the transform() method when needs to create a JMS Queue
object to the target provider
|
protected Topic |
createTopic(String topicName)
To be called from the transform() method when needs to create a JMS Topic
object to the target provider
|
Object |
getBranchTo()
This method is called by the bridge service after transform()
is returned for bridge types that support branchTo()
|
void |
init(Object obj,
String bridgeType)
This method is called by the bridge service before transform() is called.
|
boolean |
isNoTransfer()
This method is called by the bridge service after transform()
is returned for bridge types that support noTransfer()
|
protected void |
noTransfer()
To be called from the transform() method when needs to tell the bridge
to consume from source and not transfer to target the message that is
to be returned by the transform() call
|
abstract T |
transform(S message,
boolean readOnly,
String charsetName,
String source,
String target,
Properties properties)
To be implemented by user
|
public static final String SUN_MQ
public static final String STOMP
public final void init(Object obj, String bridgeType)
public final Object getBranchTo()
public final boolean isNoTransfer()
protected final Message createJMSMessage(MessageTransformer.JMSMessageType type) throws Exception
type
- the type of the JMS message to be createdIllegalStateException
- if this MessageTransfomer object is not initializedException
- if fails to create the JMS Messageprotected final Queue createQueue(String queueName) throws Exception
queueName
- the name of the QueueIllegalStateException
- if this MessageTransfomer object is not initializedException
- if fails to create the Queue objectprotected final Topic createTopic(String topicName) throws Exception
topicName
- the name of the TopicIllegalStateException
- if this MessageTransfomer object is not initializedException
- if fails to create the Topic objectprotected final void branchTo(Object d) throws Exception
d
- a java.lang.String or javax.jms.Destination object that specifies
the destination in target provider to branch the message toIllegalStateException
- if this MessageTransfomer object is not initializedIllegalArgumentException
- if null or unexpected object type passed inUnsupportedOperationException
- if the operation is not supported for the bridge typeException
- if fails to create the JMS Messageprotected final void noTransfer() throws Exception
IllegalStateException
- if this MessageTransfomer object is not initializedUnsupportedOperationException
- if the operation is not supported for the bridge typeException
public abstract T transform(S message, boolean readOnly, String charsetName, String source, String target, Properties properties) throws Exception
message
- the message object to be tranformed.readOnly
- if the message is in read-only modecharsetName
- the charset name for message if applicable, null if not availablesource
- the source provider nametarget
- the target provider nameproperties
- any properties for the transform() call, null if noneException
- if unable to transform messageCopyright (c) 2013, Oracle and/or its affiliates. All rights reserved.