ISISController
Class SetCentralWavelengthAction

java.lang.Object
  FourMS.SequenceSubaction
      ISISController.SetCentralWavelengthAction

All Implemented Interfaces:

SubActionCompletionListenerOperations, SubActionOperations, java.lang.Runnable

public class SetCentralWavelengthAction
extends SequenceSubaction
implements java.lang.Runnable, SubActionOperations

This class implements a software controller level sequence subaction which will result in the position of either the red or blue grating being set according to a central wavelength which is specified by the user. There are a number of factors involved in the calculation of this position which includes the number of lines per mm of the grating which is currently deployed in the grating mechanism and a grating offset which can be specified by the user.

The action is expected to take two arguments which are outlined below;

Parameter	Semantics
Arm	Which arm of ISIS the user wishes the central wavelength to be calculated for
Wavelength	The desired central wavelength specified in angstroms

The object is a persistent CORBA object which will be registered with the name service and can then subsequently be used by CORBA client. It implements the standard SubAction IDL interface and it itself is a CORBA object which is registered with the Name service and subsequently can be invoked by remote CORBA clients.

The subaction will be registered in the name service as ISISController/SequenceSubaction/SetCentralWavelengthAction should it need to be accessed and used by a CORBA client

Version:

$Id: SetCentralWavelengthAction.java,v 1.4 2005/05/19 14:18:37 cb Exp $

Author:

Craige Bevil

Field Summary

private SubAction	BlueGratingMoveAction This is a reference to the subaction which can be used to move the blue grating.
private SubAction	GratingMoveAction This is a CORBA reference to the grating which is to be moved
private iParameterNoticeBoard.ParameterNoticeBoardSupplier	ParameterNoticeBoard This is reference to the remote proxy CORBA object which will be used to access the parameter name service so that we may access status information relating to the ISIS system.
private SubAction	RedGratingMoveAction This is a reference to the subaction which can be used to move the red grating.

Fields inherited from class FourMS.SequenceSubaction

ActionCompletionListener, ActionCompletionListenerImpl, ActionState, ExpectedNoOfArgs, InstrumentName, NumberOfSubactionsInSequenceOutstanding, Orb, Poa, RootNamingServiceContext, SecondsBeforeTimeout, SequenceSubActionInitiatorCB, SequenceSubactionName, SubactionArgumentList, SubactionThread, SyslogMessageHandler, TimeOut

Constructor Summary

SetCentralWavelengthAction(java.lang.String SequenceSubactionName, java.lang.String InstrumentName, org.omg.PortableServer.POA Poa, org.omg.CORBA.ORB Orb, MessageHandler SyslogMessageHandler, org.omg.CosNaming.NamingContextExt RootNamingServiceContext)
The constructor

Method Summary

void	run() This is the run method which represents the thread within which the action will run.

Methods inherited from class FourMS.SequenceSubaction

cancelAction, informSubactionInitiator, informSubactionInitiator, registerSubactionInNameService, returnResult, startAction, subActionEnded, waitForActionToComplete

Methods inherited from class java.lang.Object

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

Methods inherited from interface FourMSControllerInterfaces.SubActionOperations

cancelAction, startAction

Field Detail

ParameterNoticeBoard

private iParameterNoticeBoard.ParameterNoticeBoardSupplier ParameterNoticeBoard

This is reference to the remote proxy CORBA object which will be used to access the parameter name service so that we may access status information relating to the ISIS system.

GratingMoveAction

private SubAction GratingMoveAction

This is a CORBA reference to the grating which is to be moved

RedGratingMoveAction

private SubAction RedGratingMoveAction

This is a reference to the subaction which can be used to move the red grating.

BlueGratingMoveAction

private SubAction BlueGratingMoveAction

This is a reference to the subaction which can be used to move the blue grating.

Constructor Detail

SetCentralWavelengthAction

public SetCentralWavelengthAction(java.lang.String SequenceSubactionName,
                                  java.lang.String InstrumentName,
                                  org.omg.PortableServer.POA Poa,
                                  org.omg.CORBA.ORB Orb,
                                  MessageHandler SyslogMessageHandler,
                                  org.omg.CosNaming.NamingContextExt RootNamingServiceContext)

The constructor

Parameters:

SequenceSubactionName - This is the name of the subaction sequence for reporting purposes, this should correspond to the name that is given to the object in the name service

InstrumentName - This is the name of the instrument to which this subaction is associated

Poa - This is a reference to the POA to be used by this object

Orb - This is a reference to the ORB

SyslogMessageHandler - A syslog message handler which will be used for error reporting

RootNamingServiceContext - This is a reference to the root context of the naming service so that we can

Method Detail

run

public void run()

This is the run method which represents the thread within which the action will run. When the subaction is intiated, a thread is started and this is the method which is called and when the thread is started.

The purpose of the method is to calculate the central wavelength for the specified grating and subsequently set the grating to that position.

Specified by:

run in interface java.lang.Runnable