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java.lang.Object
   |
   +----edu.utah.janos.antsr.core.WatchDog

Summary

class  WatchDog
     extends java.lang.Object
     implements java.lang.Runnable
{
          // Fields 3
     private static final int MAX_SOCKET_BACKLOG;
     private final Node node;
     private final ServerSocket socket;

          // Constructors 1
     WatchDog(Node, int) throws IOException;

          // Methods 4
     void accept();
     int getPort();
     public void run();
     public String toString();

          // Inner Classes 1
     private class WatchDog.Worker
}

A simple watch dog class, it opens a network port and prints out little messages to whoever has connected to it.

Fields

· MAX_SOCKET_BACKLOG

Summary  |  Top

   private static final int MAX_SOCKET_BACKLOG

   private final ServerSocket socket

The socket this watch dog listens on.

   private final Node node

Constructors

· WatchDog

Summary  |  Top

   WatchDog(Node node, 
            int port)  throws IOException

Create a WatchDog listener on the given port. Blows up if the port is already in use, throwing an IOException.

Connections will not be handled until the accept() method is executed. You'd best supply a new thread to handle them, too.

Parameter	Description
port	the port to use; zero for any free port.

Throws: IOException

throws whatever errors ServerSocket might toss your way.

See Also: accept

   int getPort() 

Return the port this watch dog server listens on

   public String toString() 

Overrides:

toString in class Object

   public void run() 

Implements:

run in interface Runnable

   void accept() 

Accept and handle connections on this watch dog.

This call never returns.

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