solar.service.dan
Class ProxyOperator

java.lang.Object
  |
  +--solar.service.dan.GraphNode
        |
        +--solar.service.dan.Filter
              |
              +--solar.service.dan.Operator
                    |
                    +--solar.service.dan.ProxyOperator

All Implemented Interfaces:

DanConstants, Identifiable

public class ProxyOperator

extends Operator

A proxy operator deligates the duty to its assgined event handler.

Version:

$Id: ProxyOperator.java,v 1.1 2003/09/19 00:38:30 glchen Exp $

Author:

Guanling Chen

Field Summary

protected EventHandler

_handler

Fields inherited from class solar.service.dan.GraphNode

_gid

Fields inherited from interface solar.service.dan.DanConstants

DAN_INPORT, DAN_OUTPORT

Constructor Summary

ProxyOperator(EventHandler handler)

Method Summary

void	handleEvent(Event evt) Handle the event being actively pushed/published to this operator.
java.lang.Object	handleQuery(Request query) Handle the query being actively pulled by downstream operators.

Methods inherited from class solar.service.dan.GraphNode

getId, getInputPorts, getOutputPorts, handleEvent, handleQuery, init, init, publish, publish, setId

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_handler

protected EventHandler _handler

Constructor Detail

ProxyOperator

public ProxyOperator(EventHandler handler)

Method Detail

handleEvent

public void handleEvent(Event evt)
                 throws java.lang.Exception

Description copied from class: GraphNode

Handle the event being actively pushed/published to this operator.

Specified by:

handleEvent in class GraphNode

java.lang.Exception

handleQuery

public java.lang.Object handleQuery(Request query)
                             throws java.lang.Exception

Description copied from class: GraphNode

Handle the query being actively pulled by downstream operators.

Specified by:

handleQuery in class GraphNode

java.lang.Exception