soapproxyservice.java

一个类似于openJMS分布在ObjectWeb之下的JMS消息中间件。

/*
 * JORAM: Java(TM) Open Reliable Asynchronous Messaging
 * Copyright (C) 2003 - 2004 ScalAgent Distributed Technologies
 * Copyright (C) 2004 - France Telecom R&D
 * Copyright (C) 2003 - 2004 Bull SA
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA.
 *
 * Initial developer(s): Frederic Maistre (Bull)
 * Contributor(s): ScalAgent Distributed Technologies
 */
package org.objectweb.joram.mom.proxies.soap;

import fr.dyade.aaa.agent.AgentId;
import fr.dyade.aaa.agent.AgentServer;
import fr.dyade.aaa.agent.Channel;
import fr.dyade.aaa.util.Queue;
import org.objectweb.joram.mom.MomTracing;
import org.objectweb.joram.mom.proxies.*;
import org.objectweb.joram.shared.client.*;
import org.objectweb.joram.shared.excepts.*;
import org.objectweb.joram.mom.notifications.*;

import java.util.*;
import java.lang.reflect.*;

import org.objectweb.util.monolog.api.BasicLevel;

/**
 * The <code>SoapProxyService</code> class implements the SOAP service
 * accessed by the JORAM clients using a <code>SoapConnection</code> for
 * connecting to the MOM. 
 * <p>
 */
public class SoapProxyService {

  private Hashtable connections;

  /**
   * Service method: called by the SOAP client for instanciating the SOAP
   * service and starting the embedded JORAM server.
   *
   * @param serverId  Identifier of the embedded server.
   * @param serverName  Name of the embedded server.
   *
   * @exception Exception  If the embedded server could not start.
   */
  public void start(int serverId, String serverName) throws Exception
  {
    String[] args = {"" + serverId, serverName};
    AgentServer.init(args);
    AgentServer.start();

    connections = new Hashtable();

    if (MomTracing.dbgProxy.isLoggable(BasicLevel.DEBUG))
      MomTracing.dbgProxy.log(BasicLevel.DEBUG, "SoapProxyService started.");
  }

  /**
   * Service method: returns the identifier of a given user connection, 
   * or -1 if it is not a valid user of the SOAP proxy.
   *
   * @param userName User's name.
   * @param userPassword User's password.
   * @param heartBeat
   * @return connection identifier
   * @exception Exception  If the proxy is not deployed.
   */
  public int setConnection(String userName, 
                           String userPassword, 
                           int heartBeat)
    throws Exception
  {
    if (MomTracing.dbgProxy.isLoggable(BasicLevel.DEBUG))
      MomTracing.dbgProxy.log(
        BasicLevel.DEBUG, "SoapProxyService.setConnection(" + 
        userName + ',' + 
        userPassword + ',' + 
        heartBeat + ')');

    GetProxyIdNot gpin = new GetProxyIdNot(userName, userPassword, null);
    AgentId proxyId;
    gpin.invoke(new AgentId(AgentServer.getServerId(),
                            AgentServer.getServerId(),
                            AgentId.JoramAdminStamp));
    proxyId = gpin.getProxyId();
    
    OpenConnectionNot ocn = new OpenConnectionNot(
      false, heartBeat);	
    ocn.invoke(proxyId);

    StandardConnectionContext cc = 
      (StandardConnectionContext)ocn.getConnectionContext();
    ProxyConnectionContext pcc = new ProxyConnectionContext(
      proxyId,
      (Queue)cc.getQueue());
    connections.put(new ConnectionKey(
      userName, cc.getKey()), pcc);
    
    return cc.getKey();
  }
  
  /**
   * Service method: passes a hashtable containing an
   * <code>AbstractJmsRequest</code> client request or MOM messages to the
   * proxy.
   *
   * @param cnxId  The sending connection.
   * @param h  Hashtable containing a request or MOM messages.
   *
   * @exception Exception  If the connection has been closed.
   */
  public void send(String name, int cnxId, java.util.Hashtable h) throws Exception
  {
    if (MomTracing.dbgProxy.isLoggable(BasicLevel.DEBUG))
      MomTracing.dbgProxy.log(
        BasicLevel.DEBUG, "SoapProxyService.send(" + 
        name + ',' + cnxId + ',' + h + ')');

    String className = (String) h.get("className");
    Class clazz = Class.forName(className);
    Class [] classParam = { new Hashtable().getClass() };
    Method m = clazz.getMethod("soapDecode",classParam);
    AbstractJmsRequest request = 
      (AbstractJmsRequest) m.invoke(null,new Object[]{h});
    
    if (MomTracing.dbgProxy.isLoggable(BasicLevel.DEBUG))
      MomTracing.dbgProxy.log(BasicLevel.DEBUG, "--- " + this
                              + " passes request " + request + " with id "
                              + request.getRequestId() + " to proxy's cnx "
                              + cnxId);
    ProxyConnectionContext ctx = 
      (ProxyConnectionContext)connections.get(
        new ConnectionKey(name, cnxId));
    if (ctx == null) {
      throw new StateException("Connection " + name + ':' + cnxId + " closed.");
    } else {
      ConnectionManager.sendToProxy(
          ctx.proxyId,
          cnxId,
          request, 
          request);
    }
  }

  /**
   * Service method: returns a Hashtable containing an
   * <code>AbstractJmsReply</code> reply or MOM messages destinated to a
   * given connection context.
   *
   * @param cnxId  The identifier of the requesting connection.
   *
   * @exception Exception  If the connection has been closed.
   */
  public java.util.Hashtable getReply(String name, int cnxId) throws Exception
  {
    ConnectionKey ckey = new ConnectionKey(name, cnxId);
    ProxyConnectionContext ctx = 
      (ProxyConnectionContext)connections.get(ckey);
    if (ctx == null) {
      throw new StateException("Connection " + name + ':' + cnxId + " closed.");
    } else {
      Object obj = ctx.replyQueue.get();
      if (obj instanceof Exception) {
        connections.remove(ckey);
        throw (Exception)obj;
      } else {
        AbstractJmsReply reply = 
          (AbstractJmsReply)obj;
        ctx.replyQueue.pop();
        if (reply instanceof CnxCloseReply) {
          connections.remove(ckey);
        }
        return reply.soapCode();
      }
    }
  }

  static class ConnectionKey {
    private String userName;
    private int key;

    public ConnectionKey(String userName,
                         int key) {
      this.userName = userName;
      this.key = key;
    }

    public int hashCode() {
      return userName.hashCode() + key;
    }

    public boolean equals(Object obj) {
      if (obj instanceof ConnectionKey) {
        ConnectionKey ck = (ConnectionKey)obj;
        return (ck.userName.equals(userName) &&
                ck.key == key);
      }
      return false;
    }
  }

  static class ProxyConnectionContext {
    AgentId proxyId;    
    Queue replyQueue;

    ProxyConnectionContext(AgentId proxyId,
                      Queue replyQueue) {
      this.proxyId = proxyId;
      this.replyQueue = replyQueue;
    }
  }
}