cern.cmw.rda.client
Class GetRequest

java.lang.Object
  cern.cmw.rda.client.Request
      cern.cmw.rda.client.GetRequest

public class GetRequest
extends Request

Represents a request to execute a get operation on a device. A GetRequest object is created as a result of the get method of the DeviceHandle class. The call sends the request to the device server, and returns it to the caller in the PENDING state. The RDA waits for a reply to each pending GetRequest, but no longer then specified by the cmw.rda.timeout property. The request will leave the PENDING state and its associated ReplyHandler will be called if one of the following events happens:

• reply received
  Depending on the reply type, one the following methods will be called:
  • ReplyHandler.handleReply(Request,Data)
    on a normal reply that contains the requested property value
  • ReplyHandler.handleException(Request,BadParameter)
ReplyHandler.handleException(Request,IOError)
ReplyHandler.handleException(Request,InternalException)
    on an error reply that contains the error info
• connection lost to the server
  ReplyHandler.handleException(Request,NoConnection) will be called.
• timeout
  ReplyHandler.handleException(Request,TimeOut) will be called.

A GetRequest object will be deleted (garbage collected) if it is not PENDING and unreferenced in the user code.

Method Summary

Methods inherited from class cern.cmw.rda.client.Request

getContext, getCycleSelector, getDeviceHandle, getPropertyName, isPending

Methods inherited from class java.lang.Object

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