/* $Id$ */
// =========================================================
// 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.naming.InitialContext;
import javax.naming.NamingException;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.QueueReceiver;
import javax.jms.QueueSession;
import javax.jms.TextMessage;

public class QueueSynchReceiver
{
    private static QueueConnectionFactory queueConnectionFactory;
    private static QueueConnection        queueConnection;
    private static QueueSession           queueSession;
    private static QueueReceiver          queueReceiver;
    private static Queue                  queue;
    private static String                 QUEUECONFACT = "QueueConnectionFactory";

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


    public static void main( String[] args )
    {
        String         queueName = null;
        TextMessage    message = null;

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

        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 Receiver ..." );
            queueReceiver = queueSession.createReceiver( queue );
            System.out.println( "done!!" );
            queueConnection.start();
            System.out.println( "Receiver ready!!" );
            while( true ) {
                Message msg = queueReceiver.receive();
                if( msg instanceof TextMessage ) {
                    message = (TextMessage)msg;
                    System.out.println( "Received message : " + message.getText() );
                } else {
                    // non-text message is end of messages.
                    System.out.print( "commiting ..." );
                    queueSession.commit();
                    System.out.println( "done!!" );
                    break;
                }
            }
        } 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;
    }
}