/* $Id$ */
// =========================================================
// Copyright (C) NEC Corporation 2004
// NEC CONFIDENTIAL AND PROPRIETARY
// All rights reserved by NEC Corporation.
// This program must be used solely for the purpose for which
// it was furnished by NEC Corporation. No part of this
// program may be reproduced or disclosed to others, in any
// form, without the prior written permission of NEC
// Corporation. Use of copyright notice does not evidence
// publication of the program.
// =========================================================

import javax.jms.JMSException;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.QueueSender;
import javax.jms.QueueSession;
import javax.jms.TextMessage;
import javax.naming.InitialContext;
import javax.naming.NamingException;

public class QueueSenderExample
{
    private static QueueConnectionFactory queueConnectionFactory;
    private static QueueConnection        queueConnection;
    private static QueueSession           queueSession;
    private static QueueSender            queueSender;
    private static Queue                  queue;
    private static String                 QUEUECONFACT = "QueueConnectionFactory";

    private static String                 myname = QueueSenderExample.class.getName();
    private static InitialContext         context;

    public static void main( String[] args )
    {
        String             queueName = null;
        int                num_msgs = 10;
        String             msg_text = "Sample message #";
        TextMessage        message = null;

        if( args.length < 2 ) {
            System.out.println( "usage: java " + myname + " <queue_name> <factory_name> [<number_of_messages>]" );
            System.exit(1);
        }
        queueName = args[0];
        QUEUECONFACT = args[1];
        if( args.length >= 3 ) {
            num_msgs = Integer.parseInt(args[2]);
        }

        try {
            System.out.print( "looking up " + QUEUECONFACT + " ..." );
            queueConnectionFactory =
                    (QueueConnectionFactory)lookupJNDI( QUEUECONFACT );
            System.out.println( "done!!" );
            System.out.print( "creating QueueConnection ..." );
            queueConnection =
                    queueConnectionFactory.createQueueConnection();
            System.out.println( "done!!" );
            System.out.print( "creating QueueSession ..." );
            queueSession = queueConnection.createQueueSession( true, 0 );
            System.out.println( "done!!" );
            System.out.print( "looking up " + queueName + " ..." );
            queue = (Queue)lookupJNDI( queueName );
            System.out.println( "done!!" );
        } catch( Exception e ) {
            System.out.println( e );
            e.printStackTrace();
            if( queueConnection != null ) {
                try {
                    queueConnection.close();
                } catch( JMSException ee ) {}
            }
        }

        try {
            System.out.print( "creating Sender ..." );
            queueSender = queueSession.createSender( queue );
            System.out.println( "done!!" );
            message = queueSession.createTextMessage();
            for( int i=0; i<num_msgs; i++ ) {
                message.setText( msg_text + (i+1) );
                System.out.println( "Sending message : " + message.getText() );
                queueSender.send( message );;
            }
            // send a non-text message and commit transaction to finish the Consumer
            queueSender.send( queueSession.createMessage() );
            System.out.print( "commiting transaction ..." );
            queueSession.commit();
            System.out.println( "done!!" );
        } catch( Exception e ) {
            System.out.println( e );
            e.printStackTrace();
        } finally {
            if( queueConnection != null ) {
                try {
                    queueConnection.close();
                } catch( JMSException ee ) {}
            }
        }

        return;
    }


    private static Object lookupJNDI( String name ) throws Exception
    {
        Object                obj=null;

        if( context == null ) {
            try {
                context = new InitialContext();
            } catch( NamingException e ) {
                System.err.println( "lookupJNDI creatng InitialContext failed." );
                e.printStackTrace();
                throw e;
            }
        }
        try {
            obj = context.lookup( name );
        } catch( NamingException e ) {
            System.err.println( "lookupJNDI looking up object failed." );
            e.printStackTrace();
            throw e;
        }
        return obj;
    }
}