/*
    * Replica is published under the terms
    * of the Apache Software License.
    */
   package replica.server.commands;
   
   import replica.core.*;
   import replica.core.ApplicationMessage;
   import replica.server.ServerProcess;
  
  /***
   * This command simple sends a given string to the user.
   * 
   * @author Pedro Costa
   * @author Helder Silva
   * @since 21/Jan/2004
   */
  public class PrintCommand extends ApplicationCommand {
  	
  	public final static String NAME = "print";
  
      /***
       * Default constructor. 
       */
      public PrintCommand() {
          super();
      }
  
      /* (non-Javadoc)
       * @see replica.server.commands.ServerCommand#execute(replica.core.ApplicationMessage)
       */
      protected Object execute(ApplicationMessage arg) {
      	
      	ServerProcess serverProcess = getServerProcess(arg.getSessionID());
      	
      	if( serverProcess != null ){
      		String msg = arg.getBody().toString().trim();
      		
      		if(msg.startsWith(NAME + " "))
      			msg = msg.substring( (NAME+" ").length() ).trim();
      			
      		serverProcess.sendResponse(msg);
      	}
      	
      	// else that session id belongs to any other group member
      	
          return null;
      }
  
  }