/*
* $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/taglibs/beanshell/src/java/org/apache/commons/jelly/tags/beanshell/BeanShellExpressionFactory.java,v 1.1 2002/05/21 07:58:55 jstrachan Exp $
* $Revision: 1.1 $
* $Date: 2002/05/21 07:58:55 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* $Id: BeanShellExpressionFactory.java,v 1.1 2002/05/21 07:58:55 jstrachan Exp $
*/
package org.apache.commons.jelly.tags.jms;
import javax.jms.Destination;
import javax.jms.Message;
import org.apache.commons.jelly.JellyException;
import org.apache.commons.jelly.TagSupport;
import org.apache.commons.jelly.XMLOutput;
import org.apache.commons.messenger.Messenger;
/** A tag which creates a JMS message
*
* @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
* @version $Revision: 1.1 $
*/
public class MessageTag extends TagSupport {
/** The name of the Message variable that is created */
private String var;
/** The JMS Message created */
private Message message;
/** The Messenger used to access the JMS connection */
private Messenger connection;
public MessageTag() {
}
/** Adds a JMS property to the message */
public void addProperty(String name, Object value) throws Exception {
Message message = getMessage();
message.setObjectProperty(name, value);
}
// Tag interface
//-------------------------------------------------------------------------
public void doTag(XMLOutput output) throws Exception {
if ( var == null ) {
// expose message to parent message consumer
SendTag tag = (SendTag) findAncestorWithClass( SendTag.class );
if ( tag == null ) {
throw new JellyException("<jms:message> tags must either have the 'var' attribute specified or be used inside a <jms:send> tag");
}
tag.setMessage( getMessage() );
}
else {
context.setVariable( var, getMessage() );
}
}
// Properties
//-------------------------------------------------------------------------
/** Sets the name of the variable that the message will be exported to */
public void setVar(String var) {
this.var = var;
}
public Messenger getConnection() throws Exception {
if ( connection == null ) {
return findConnection();
}
return connection;
}
/**
* Sets the Messenger (the JMS connection pool) that will be used to send the message
*/
public void setConnection(Messenger connection) {
this.connection = connection;
}
public Message getMessage() throws Exception {
if ( message == null ) {
message = createMessage();
}
return message;
}
// JMS related properties
/**
* Sets the JMS Correlation ID to be used on the message
*/
public void setCorrelationID(String correlationID) throws Exception {
getMessage().setJMSCorrelationID(correlationID);
}
/**
* Sets the reply-to destination to add to the message
*/
public void setReplyTo(Destination destination) throws Exception {
getMessage().setJMSReplyTo(destination);
}
/**
* Sets the type name of the message
*/
public void setType(String type) throws Exception {
getMessage().setJMSType(type);
}
// Implementation methods
//-------------------------------------------------------------------------
protected Messenger findConnection() throws Exception {
ConnectionContext messengerTag = (ConnectionContext) findAncestorWithClass( ConnectionContext.class );
if ( messengerTag == null ) {
throw new JellyException("This tag must be within a <jms:connection> tag or the 'connection' attribute should be specified");
}
return messengerTag.getConnection();
}
protected Message createMessage() throws Exception {
return getConnection().createMessage();
}
}