defaultorb.java

来自「OpenJMS是一个开源的Java Message Service API 1.」· Java 代码 · 共 611 行 · 第 1/2 页

/**
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright
 *    statements and notices.  Redistributions must also contain a
 *    copy of this document.
 *
 * 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 name "Exolab" must not be used to endorse or promote
 *    products derived from this Software without prior written
 *    permission of Exoffice Technologies.  For written permission,
 *    please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "Exolab"
 *    nor may "Exolab" appear in their names without prior written
 *    permission of Exoffice Technologies. Exolab is a registered
 *    trademark of Exoffice Technologies.
 *
 * 5. Due credit should be given to the Exolab Project
 *    (http://www.exolab.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2003-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: DefaultORB.java,v 1.13 2006/02/23 11:17:40 tanderson Exp $
 */
package org.exolab.jms.net.orb;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.rmi.ConnectException;
import java.rmi.NoSuchObjectException;
import java.rmi.RemoteException;
import java.rmi.StubNotFoundException;
import java.rmi.server.ExportException;
import java.security.Principal;
import java.util.Map;

import EDU.oswego.cs.dl.util.concurrent.PooledExecutor;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.exolab.jms.common.security.BasicPrincipal;
import org.exolab.jms.common.threads.DefaultThreadPoolFactory;
import org.exolab.jms.net.connector.AbstractConnectionManager;
import org.exolab.jms.net.connector.Authenticator;
import org.exolab.jms.net.connector.Caller;
import org.exolab.jms.net.connector.CallerListener;
import org.exolab.jms.net.connector.Connection;
import org.exolab.jms.net.connector.Invocation;
import org.exolab.jms.net.connector.InvocationHandler;
import org.exolab.jms.net.connector.MulticastCallerListener;
import org.exolab.jms.net.connector.Request;
import org.exolab.jms.net.connector.ResourceException;
import org.exolab.jms.net.connector.Response;
import org.exolab.jms.net.proxy.Proxy;
import org.exolab.jms.net.registry.LocalRegistry;
import org.exolab.jms.net.registry.Registry;
import org.exolab.jms.net.uri.InvalidURIException;
import org.exolab.jms.net.uri.URI;
import org.exolab.jms.common.threads.ThreadPoolFactory;
import org.exolab.jms.net.util.MethodHelper;
import org.exolab.jms.net.util.Properties;


/**
 * The <code>DefaultORB</code> class manages exported objects.
 *
 * @author <a href="mailto:[e-mail]">Tim Anderson</a>
 * @version $Revision: 1.13 $ $Date: 2006/02/23 11:17:40 $
 */
class DefaultORB extends AbstractORB {

    /**
     * The registry.
     */
    private LocalRegistry _registry;

    /**
     * The connection manager.
     */
    private AbstractConnectionManager _manager;

    /**
     * The caller event listeners.
     */
    private MulticastCallerListener _listeners;

    /**
     * The thread pool factory.
     */
    private ThreadPoolFactory _factory;

    /**
     * The thread pool for scheduling invocation requests.
     */
    private PooledExecutor _pool;

    /**
     * The maximum no. of threads to use in the thread pool.
     */
    private int _maxThreads;

    /**
     * Synchronization helper for accessing _pool.
     */
    private final Object _poolLock = new Object();

    /**
     * Current caller.
     */
    private final ThreadLocal _caller = new ThreadLocal();

    /**
     * Constant that holds the name of the connection property for specifying
     * the maximum no. of threads to use for servicing invocations.
     */
    private static final String MAX_THREADS_NAME
            = "org.exolab.jms.net.orb.threads.max";

    /**
     * Constant that holds the name of the connection property for specifying
     * the thread pool factory.
     */
    private static final String THREAD_POOL_FACTORY
            = "org.exolab.jms.net.orb.threads.factory";

    /**
     * Default max no. of threads to service invocations, if none is specified.
     */
    private static final int MAX_THREADS = Integer.MAX_VALUE;

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


    /**
     * Construct a new <code>DefaultORB</code> with the connection
     * authenticator. All proxies will be loaded using this instance's class
     * loader.
     *
     * @param authenticator the connection authenticator
     * @throws RemoteException for any error
     */
    public DefaultORB(Authenticator authenticator)
            throws RemoteException {
        this(authenticator, DefaultORB.class.getClassLoader(), null);
    }

    /**
     * Construct a new <code>DefaultORB</code> with the connection
     * authenticator, and properties to configure the ORB. All proxies will be
     * loaded using this instance's class loader.
     *
     * @param authenticator the connection authenticator
     * @param properties    properties to configure the ORB. May be
     *                      <code>null</code>
     * @throws RemoteException for any error
     */
    public DefaultORB(Authenticator authenticator, Map properties)
            throws RemoteException {
        this(authenticator, DefaultORB.class.getClassLoader(), properties);
    }

    /**
     * Construct a new <code>DefaultORB</code> with properties to configure the
     * ORB. Connections will be unauthenticated. All proxies will be loaded
     * using this instance's class loader.
     *
     * @throws RemoteException for any error
     */
    public DefaultORB(Map properties) throws RemoteException {
        this(new DummyAuthenticator(), DefaultORB.class.getClassLoader(),
                properties);
    }

    /**
     * Construct a new <code>DefaultORB</code>. Connections will be
     * unauthenticated. All proxies will be loaded using this instance's class
     * loader.
     *
     * @throws RemoteException for any error
     */
    public DefaultORB() throws RemoteException {
        this(new DummyAuthenticator(), DefaultORB.class.getClassLoader(),
                null);
    }

    /**
     * Construct a new <code>DefaultORB</code> with the connection
     * authenticator, the class loader used to load proxies, and properties to
     * configure the ORB.
     *
     * @param authenticator the connection authenticator
     * @param loader        the class loader to load proxies
     * @param properties    properties to configure the ORB. May be
     *                      <code>null</code>
     * @throws RemoteException for any error
     */
    public DefaultORB(Authenticator authenticator, ClassLoader loader,
                      Map properties)
            throws RemoteException {
        super(loader, properties);
        if (authenticator == null) {
            throw new IllegalArgumentException(
                    "Argument 'authenticator' is null");
        }

        Properties helper = new Properties(properties, null);
        try {
            _maxThreads = helper.getInt(MAX_THREADS_NAME, MAX_THREADS);
        } catch (ResourceException exception) {
            throw new RemoteException("Failed to construct thread pool",
                    exception);
        }

        _factory = (ThreadPoolFactory) helper.getProperties().get(
                THREAD_POOL_FACTORY);
        if (_factory == null) {
            _factory = new DefaultThreadPoolFactory(null);
        }

        try {
            _manager = createConnectionManager(new Handler(), authenticator);
        } catch (ResourceException exception) {
            throw new RemoteException("Failed to construct connection manager",
                    exception);
        }
    }

    /**
     * Returns a reference to the registry service.
     *
     * @return the registry service
     * @throws RemoteException if the service cannot be exported
     */
    public synchronized LocalRegistry getRegistry() throws RemoteException {
        if (_registry == null) {
            _registry = new RegistryService(this);
        }
        return _registry;
    }

    /**
     * Returns a reference to a remote registry service.
     *
     * @param properties the connection properties.
     * @return the registry service
     * @throws RemoteException for any error
     */
    public Registry getRegistry(Map properties) throws RemoteException {
        if (properties == null || properties.get(PROVIDER_URI) == null) {
            throw new ConnectException(PROVIDER_URI + " not specified");
        }
        Registry registry;
        String uri = (String) properties.get(PROVIDER_URI);
        String principal = (String) properties.get(SECURITY_PRINCIPAL);
        String credentials = (String) properties.get(SECURITY_CREDENTIALS);
        Principal subject = null;

        if (principal != null) {
            subject = new BasicPrincipal(principal, credentials);
        }

        try {
            registry = Locator.getRegistry(subject, uri, _manager,
                    getProxyClassLoader(),
                    properties);
        } catch (InvalidURIException exception) {
            throw new RemoteException("Invalid URI: " + uri, exception);
        }
        return registry;
    }

    /**
     * Export an object to the current remote caller. Only the remote caller may
     * perform invocations.
     *
     * @param object the object to export
     * @return a proxy which may be used to invoke methods on the object
     * @throws ExportException       if the object cannot be exported
     * @throws StubNotFoundException if the proxy class cannot be found
     */
    public Proxy exportObjectTo(Object object) throws ExportException,
            StubNotFoundException {
        Caller caller = (Caller) _caller.get();
        if (caller == null) {