/*
 * Copyright (C) 2003-2007 eXo Platform SAS.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see<http://www.gnu.org/licenses/>.
 */
package org.exoplatform.services.remote.group.impl;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Vector;

import org.jgroups.Address;
import org.jgroups.JChannel;
import org.jgroups.View;
import org.jgroups.blocks.GroupRequest;
import org.jgroups.blocks.MessageDispatcher;
import org.jgroups.util.Rsp;
import org.jgroups.util.RspList;

import org.exoplatform.services.log.Log;

import org.exoplatform.container.component.ComponentPlugin;
import org.exoplatform.container.xml.InitParams;
import org.exoplatform.container.xml.ValuesParam;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.remote.group.CommunicationService;
import org.exoplatform.services.remote.group.CommunicationServiceMonitor;
import org.exoplatform.services.remote.group.MemberInfo;
import org.exoplatform.services.remote.group.Message;
import org.exoplatform.services.remote.group.MessageHandler;
import org.exoplatform.services.remote.group.PingResult;
import org.exoplatform.services.remote.group.Response;
import org.exoplatform.services.remote.group.ResultHandler;

/**
 * @author Tuan Nguyen (tuan08@users.sourceforge.net)
 * @since Feb 21, 2005
 * @version $Id: CommunicationServiceImpl.java 5799 2006-05-28 17:55:42Z geaz $
 */
@Deprecated
public class CommunicationServiceImpl implements CommunicationService {
  private String                       properties_;

  private JChannel                     channel_;

  private MessageDispatcher            mdispatcher_;

  private RequestHandlerImpl           requestHandler_;

  private CommunicationChannelListener channelListener_ = new CommunicationChannelListener();

  private Log                          LOG = ExoLogger.getLogger(CommunicationServiceImpl.class.getName());

  public CommunicationServiceImpl(InitParams confParams) throws Exception {
    ValuesParam param = confParams.getValuesParam("jgroups.channel.properties");
    List values = param.getValues();
    StringBuffer b = new StringBuffer();
    for (int i = 0; i < values.size(); i++) {
      b.append((String) values.get(i));
      if (i != values.size() - 1) {
        b.append(":");
      }
    }
    properties_ = b.toString();
    configure(properties_);
  }

  public void configure(String props) throws Exception {
    channel_ = new JChannel(props);
    requestHandler_ = new RequestHandlerImpl();
    mdispatcher_ = new MessageDispatcher(channel_, null, null, requestHandler_);
    channel_.setChannelListener(channelListener_);
    channel_.connect("Portal");
  }

  synchronized public void addPlugin(ComponentPlugin plugin) {
    MessageHandler handler = (MessageHandler) plugin;
    handler.init(this);
    requestHandler_.registerMessageHandler(handler);
  }

  public ComponentPlugin removePlugin(String name) {
    throw new RuntimeException("this method is not supported");
  }

  public Collection getPlugins() {
    throw new RuntimeException("");
  }

  public Message createMessage(String targetHandler) {
    MessageImpl m = new MessageImpl();
    m.setTargetHandler(targetHandler);
    return m;
  }

  synchronized public Object send(MemberInfo member, Message message) throws Exception {
    Address dest = Util.findAddress(channel_, member);
    if (dest == null)
      throw new Exception("Cannot find the member: " + member.getIpAddress());
    org.jgroups.Message jmessage = new org.jgroups.Message(dest, null, message);
    Object result = mdispatcher_.sendMessage(jmessage, GroupRequest.GET_ALL, 0);
    return result;
  }

  synchronized public void broadcast(Message message, boolean include) throws Exception {
    Vector members = null;
    if (!include)
      members = getMembersExcludeMe();
    org.jgroups.Message jmessage = new org.jgroups.Message(null, null, message);
    mdispatcher_.castMessage(members, jmessage, GroupRequest.GET_NONE, 0);
  }

  synchronized public void broadcast(Message message, ResultHandler handler, boolean include) throws Exception {
    Vector members = null;
    if (!include)
      members = getMembersExcludeMe();
    org.jgroups.Message jmessage = new org.jgroups.Message(null, null, message);
    RspList res = mdispatcher_.castMessage(members, jmessage, GroupRequest.GET_ALL, 0);
    Response response = new Response();
    List list = res.getResults();
    for (int i = 0; i < list.size(); i++) {
      Rsp rsp = (Rsp) list.get(i);
      response.populate(rsp);
      handler.handleResponse(response);
    }
  }

  synchronized public PingResult ping(MemberInfo member, String message) throws Exception {
    Address dest = Util.findAddress(channel_, member);
    if (dest == null)
      throw new Exception("Cannot find the member: " + member.getIpAddress());
    Message pingMesg = createMessage(PingMessageHandler.IDENTIFIER);
    pingMesg.setMessage(message);
    org.jgroups.Message jmessage = new org.jgroups.Message(dest, null, pingMesg);
    Object result = mdispatcher_.sendMessage(jmessage, GroupRequest.GET_ALL, 0);
    PingResult p = new PingResult(member, (String) result);
    return p;
  }

  synchronized public List pingAll(String message) throws Exception {
    Message pingMesg = createMessage(PingMessageHandler.IDENTIFIER);
    pingMesg.setMessage(message);
    org.jgroups.Message jmessage = new org.jgroups.Message(null, null, pingMesg);
    RspList res = mdispatcher_.castMessage(null, jmessage, GroupRequest.GET_ALL, 0);
    List results = new ArrayList();
    for (int i = 0; i < res.size(); i++) {
      Rsp rsp = (Rsp) res.elementAt(i);
      PingResult result = new PingResult(Util.createMemberInfo(rsp.getSender()),
                                         (String) rsp.getValue());
      results.add(result);
    }
    return results;
  }

  public CommunicationServiceMonitor getCommunicationServiceMonitor(MemberInfo info) throws Exception {
    if (info == null) {
      info = Util.createMemberInfo(channel_.getView().getCreator());
      CommunicationServiceMonitor monitor = new CommunicationServiceMonitor(requestHandler_.getMessageHandlerMonitors(),
                                                                            info);
      return monitor;
    }
    Message message = createMessage(GetCommunicationMonitorHandler.IDENTIFIER);
    CommunicationServiceMonitor monitor = (CommunicationServiceMonitor) send(info, message);
    return monitor;
  }

  public List getMembersInfo() {
    List list = new ArrayList();
    View view = channel_.getView();
    Vector members = view.getMembers();
    for (int i = 0; i < members.size(); i++) {
      Object member = members.get(i);
      list.add(Util.createMemberInfo(member));
    }
    return list;
  }

  public Vector getMembersExcludeMe() {
    View view = channel_.getView();
    Address addr = view.getCreator();
    Vector members = view.getMembers();
    for (int i = 0; i < members.size(); i++) {
      Object member = members.get(i);
      if (member.equals(addr)) {
        members.remove(i);
        return members;
      }

    }
    return members;
  }

  public String getInfo() {
    StringBuffer b = new StringBuffer();
    List members = getMembersInfo();
    for (int i = 0; i < members.size(); i++) {
      MemberInfo addr = (MemberInfo) members.get(i);
      b.append("Name: " + addr.getHostName())
       .append("; Address " + addr.getIpAddress())
       .append("; Port " + addr.getPort())
       .append("\n");
    }
    return b.toString();
  }
}