org.lsst.ccs.subsystems.fcs
Class FilterLatchModule

java.lang.Object
  java.util.Observable
      org.lsst.ccs.framework.Module
          org.lsst.ccs.subsystems.fcs.FilterLatchModule

All Implemented Interfaces:

java.io.Serializable, java.util.Observer, Latch

public class FilterLatchModule
extends org.lsst.ccs.framework.Module
implements Latch

This is a model for a latch. A latch is what holds a filter in the trucks of the autochanger. There is 2 latches : one on each side of the filter. The state of the latches are monitoring by digital sensors : one sensor to know if a filter is in the latch or not and 2 status sensors to know if the latch is locked or unlocked. If the 2 status sensors are inconsistent, the latch is in error.

Author:

virieux

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.lsst.ccs.framework.Module

org.lsst.ccs.framework.Module.ValueUpdate

Field Summary

Fields inherited from class org.lsst.ccs.framework.Module

log, name, nObserverThreads, registry, tickMillis

Constructor Summary

FilterLatchModule()

Method Summary

boolean	isInError()
boolean	isLocked()
boolean	isUnlocked()
java.lang.String	lock()
java.lang.String	unlock()

Methods inherited from class org.lsst.ccs.framework.Module

getContext, getModule, getName, getNObserverThreads, getObservables, getSubsystem, getTickMillis, init, initModule, listens, processUpdate, publishData, publishData, publishData, publishData, sendToReply, sendToStatus, setBeanName, setContext, setName, setNObserverThreads, setObservables, setStateModularSubsystem, setStateModularSubsystem, setTickMillis, shutdownNow, start, tick, update

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterLatchModule

public FilterLatchModule()

Method Detail

isInError

public boolean isInError()

Specified by:

isInError in interface Latch

unlock

public java.lang.String unlock()
                        throws org.lsst.ccs.bus.BadCommandException,
                               org.lsst.ccs.bus.ErrorInCommandExecutionException

Specified by:

unlock in interface Latch

Throws:

org.lsst.ccs.bus.BadCommandException

org.lsst.ccs.bus.ErrorInCommandExecutionException

lock

public java.lang.String lock()
                      throws org.lsst.ccs.bus.BadCommandException,
                             org.lsst.ccs.bus.ErrorInCommandExecutionException

Specified by:

lock in interface Latch

Throws:

org.lsst.ccs.bus.BadCommandException

org.lsst.ccs.bus.ErrorInCommandExecutionException

isLocked

public boolean isLocked()

Specified by:

isLocked in interface Latch

isUnlocked

public boolean isUnlocked()

Specified by:

isUnlocked in interface Latch