Android Open Source - mobile-chat Mina Chat Server Handler

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License

The source code is released under:

GNU General Public License

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Java Source Code

package br.com.etyllica.sonat.adapter.mina.server;
//from   ww  w.jav a  2s.  co m
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;

import br.com.etyllica.sonat.chat.ChatServerHandler;

public class MinaChatServerHandler extends IoHandlerAdapter implements ChatServerHandler {
  
  private final static String UNIQUE_ID = "ID"; 
  
  private List<IoSession> sessions = new ArrayList<IoSession>();
  
  private Map<String, String> names = new HashMap<String, String>();

  private int count = 0;
  
  private final static String DELIMITER = " : ";
  
  private static final String COMMAND_USERS = "/users ";
  
  private static final String COMMAND_NAME = "/name ";

  @Override
  public void messageReceived(IoSession session, Object message) {
            
    String msg = message.toString();
    
    IoSession channel = session;

    String key = getKey(channel);
    
    String name = names.get(key);
    
    if(msg.startsWith(COMMAND_NAME)) {

      changeName(key, msg);
    
      tellNames();
            
    } else {
      
      tellMessage(name, msg);
                  
    }
    
    System.out.println(name + DELIMITER + msg);
        
  }
  
  @Override
  public void sessionOpened(IoSession session) {

    // set idle time to 10 minutes
    session.getConfig().setIdleTime(IdleStatus.BOTH_IDLE, 600);
    
    count++;

    session.setAttribute(UNIQUE_ID, count);
    
    String key = getKey(session);
    
    names.put(key, "guest"+count);
    
    sessions.add(session);

    tellNames();

  }
  

  @Override
  public void sessionIdle(IoSession session, IdleStatus status) {
    
    String key = getKey(session);
    
    names.remove(key);
    
    sessions.remove(session);
    
    System.out.println("Disconnecting the idle.");
    
    // disconnect an idle client
    session.close();
    
    tellNames();
    
  }

  @Override
  public void exceptionCaught(IoSession session, Throwable cause) {
    // close the connection on exceptional situation
    session.close();
  }
  
  public String getKey(Object channel) {
    
    IoSession session = (IoSession) channel;
    
    return session.getAttribute(UNIQUE_ID).toString();
  }
  
  public void changeName(String key, String msg) {
    
    String[] parts = msg.split(" ");
    
    if(parts.length < 2) {
      return;
    }
    
    String name = msg.split(" ")[1];
    
    System.out.println(names.get(key)+" change the name to "+name);
    
    names.put(key, name);
    
  }
  
  public void tellMessage(String name, String message) {
    
    tellAll("/msg "+name+" "+message);
    
  }
  
  public void tellNames() {
    
    StringBuilder builder = new StringBuilder();
    
    for(String name: names.values()) {
      
      builder.append(name);
      
      builder.append(" ");
      
    }
        
    tellAll(COMMAND_USERS+builder.toString());
    
  }
    
  public void tellAll(String message) {
    
    for(IoSession session: sessions) {
      session.write(message);
    }
    
  }

}

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