connectionfactoryhelper.java

实现了Jms的服务器源码,支持多种适配器,DB,FTP,支持多种数据库

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 *    products derived from this Software without prior written
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 *    please contact [e-mail].
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 *    nor may "Exolab" appear in their names without prior written
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 * 5. Due credit should be given to the Exolab Project
 *    (http://www.exolab.org/).
 *
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2001,2003 (C) Exoffice Technologies Inc. All Rights Reserved.
 */

package org.exolab.jms.server;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.NamingException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.exolab.jms.client.JmsConnectionFactory;
import org.exolab.jms.client.JmsQueueConnectionFactory;
import org.exolab.jms.client.JmsServerStubIfc;
import org.exolab.jms.client.JmsTopicConnectionFactory;
import org.exolab.jms.client.JmsXAQueueConnectionFactory;
import org.exolab.jms.client.JmsXATopicConnectionFactory;
import org.exolab.jms.config.ConnectionFactories;
import org.exolab.jms.config.ConnectionFactory;
import org.exolab.jms.config.QueueConnectionFactory;
import org.exolab.jms.config.TopicConnectionFactory;
import org.exolab.jms.config.XAQueueConnectionFactory;
import org.exolab.jms.config.XATopicConnectionFactory;


/**
 * Helper class for binding connection factories in JNDI
 *
 * @version     $Revision: 1.3 $ $Date: 2003/08/07 13:33:08 $
 * @author      <a href="mailto:[e-mail]">Tim Anderson</a>
 */
public class ConnectionFactoryHelper {

    /**
     * The logger
     */
    private static final Log _log =
        LogFactory.getLog(ConnectionFactoryHelper.class);


    /**
     * Bind the connection factories to the supplied context
     *
     * @param context the context to bind factories to
     * @param factories the connection factories to bind
     * @param implementation a class implementing the {@link JmsServerIfc}
     * interface
     * @param environment parameters to pass to the associated
     * {@link JmsConnectionFactory} implementation
     * @throws NamingException if a factory cannot be bound
     */
    public static void bind(Context context, ConnectionFactories factories,
                            Class implementation, Hashtable environment)
        throws NamingException {
        if (context == null) {
            throw new IllegalArgumentException("Argument context is null");
        }
        if (factories == null) {
            throw new IllegalArgumentException("Argument factories is null");
        }
        if (implementation == null) {
            throw new IllegalArgumentException(
                "Argument implementation is null");
        }
        if (!JmsServerStubIfc.class.isAssignableFrom(implementation)) {
            throw new IllegalArgumentException(
                "Class " + implementation.getName() + " does not implement " +
                JmsServerStubIfc.class.getName());
        }
        if (environment == null) {
            throw new IllegalArgumentException("Argument environment is null");
        }

        ConnectionFactory[] queue = factories.getQueueConnectionFactory();
        ConnectionFactory[] topic = factories.getTopicConnectionFactory();
        ConnectionFactory[] xaqueue = factories.getXAQueueConnectionFactory();
        ConnectionFactory[] xatopic = factories.getXATopicConnectionFactory();
        for (int i = 0; i < queue.length; ++i) {
            bind(context, queue[i], implementation, environment);
        }
        for (int i = 0; i < topic.length; ++i) {
            bind(context, topic[i], implementation, environment);
        }
        for (int i = 0; i < xaqueue.length; ++i) {
            bind(context, xaqueue[i], implementation, environment);
        }
        for (int i = 0; i < xatopic.length; ++i) {
            bind(context, xatopic[i], implementation, environment);
        }
    }

    /**
     * Bind a connection factory to the supplied context
     *
     * @param context the context to bind factories to
     * @param factory the connection factory to bind
     * @param implementation a class implementing the {@link JmsServerIfc}
     * interface
     * @param environment parameters to pass to the associated
     * {@link JmsConnectionFactory} implementation
     * @throws NamingException if the factory cannot be bound
     */
    private static void bind(Context context, ConnectionFactory factory,
                             Class implementation, Hashtable environment)
        throws NamingException {
        JmsConnectionFactory instance = null;
        if (factory instanceof QueueConnectionFactory) {
            instance = new JmsQueueConnectionFactory(implementation.getName(),
                environment);
        } else if (factory instanceof TopicConnectionFactory) {
            instance = new JmsTopicConnectionFactory(implementation.getName(),
                environment);
        } else if (factory instanceof XAQueueConnectionFactory) {
            instance = new JmsXAQueueConnectionFactory(
                implementation.getName(), environment);
        } else if (factory instanceof XATopicConnectionFactory) {
            instance = new JmsXATopicConnectionFactory(
                implementation.getName(), environment);
        } else {
            throw new IllegalArgumentException(
                "Unknown connection factory type: " +
                factory.getClass().getName());
        }

        context.rebind(factory.getName(), instance);
        _log.debug("Bound connection factory " + factory.getName());
    }

} // -- ConnectionFactoryHelper