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java.lang.Object
   |
   +----edu.utah.janos.nodeos.FlowRun
           |
           +----edu.utah.janos.util.FlowBase

Summary

public abstract class  FlowBase
     extends edu.utah.janos.nodeos.FlowRun
{
          // Fields 5
     public String[] args;
     protected FreeList bufferHandleFreeList;
     public CommSpaceHandle commSpaceHandle;
     public Flow flow;
     public ThreadPool threadPool;

          // Constructors 1
     public FlowBase();

          // Methods 4
     public synchronized BufferHandle newBufferHandle();
     public synchronized void recycleBufferHandle(BufferHandle);
     public void run(Flow, ThreadPool, String[], CommSpaceHandle) throws Exception;
     public abstract void start() throws Exception;
}

A protocol should override FlowBase so that a flow can be created for it. When the flow is created, the overridden start() method is called.

The threadPool, flow, and args variables are guaranteed to be set before start() is called, but may not be set when the constructor is called.

Cross Reference

Extended By:

HelloWorld, TPTest, TestFlow, UdpTest

   public Flow flow

   public ThreadPool threadPool

   public String[] args

   public CommSpaceHandle commSpaceHandle

   protected FreeList bufferHandleFreeList

Constructors

· FlowBase

Summary  |  Top

   public FlowBase() 

Default constructor

   public void run(Flow flow, 
                   ThreadPool threadPool, 
                   String[] args, 
                   CommSpaceHandle commSpaceHandle)  throws Exception

This sets the threadPool, flow, and args fields and then calls start().

Overrides:

run in class FlowRun

   public synchronized BufferHandle newBufferHandle() 

Overrides:

newBufferHandle in class FlowRun

   public synchronized void recycleBufferHandle(BufferHandle b) 

Adds the BufferHandle to a freeList, so that it can be reused, and calls reset and removeFromList on the handle to clear its state.

Overrides:

recycleBufferHandle in class FlowRun

   public abstract void start()  throws Exception

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