org.lsst.ccs.monitor

Class CalcChannel

java.lang.Object

org.lsst.ccs.monitor.Channel

org.lsst.ccs.monitor.DerivedChannel

org.lsst.ccs.monitor.CalcChannel

All Implemented Interfaces:

ConfigurationBulkChangeHandler, HasConfigurationParameterDescription, HasLifecycle

public class CalcChannel
extends DerivedChannel

An extension of DerivedChannel that supports basic operations among Channels.

Author:

The LSST CCS Team

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CalcChannel.Operation

Field Summary

Fields

Modifier and Type	Field and Description
protected Monitor	mon

Fields inherited from class org.lsst.ccs.monitor.Channel

alarmHi, alarmHiA, alarmLo, alarmLoA, checkHi, checkLo, description, devcName, doNotPublish, doNotTrend, format, hwChan, hysteresis, limitHi, limitLo, offset, pageId, scale, subtype, TYPE_DIFF, TYPE_POWER, TYPE_PROD, TYPE_QUOT, TYPE_SUM, TYPE_SWITCH, TYPE_TEMP, TYPE_UNKNOWN, TYPE_VOLTS, typeI, units, warnHi, warnLo

Constructor Summary

Constructors

Constructor and Description
CalcChannel()

Method Summary

Modifier and Type	Method and Description
double	evaluateDerivedValue() Callback function to evaluate the derived value.
void	init() Called from the enclosing Subsystem at initialization phase.

Methods inherited from class org.lsst.ccs.monitor.Channel

convertRawValue, getAlarmNameHi, getAlarmNameLo, getConfigurationParameterDescription, getDescription, getDevice, getFormat, getGroup, getHwChan, getHysteresisLimitHi, getHysteresisLimitLo, getHysteresisWarnHi, getHysteresisWarnLo, getId, getLastMeasurement, getLimitHi, getLimitLo, getName, getPageId, getPath, getSubType, getSubTypeStr, getType, getTypeStr, getUnits, getValue, getWarnHi, getWarnLo, hasHysteresis, readValue, setParameterBulk, validateBulkChange

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.lsst.ccs.framework.HasLifecycle

build, postBuild, postInit, postShutdown, postStart, shutdown, start

Field Detail

mon

@LookupField(strategy=TREE)
protected Monitor mon

Constructor Detail

CalcChannel

public CalcChannel()

Method Detail

init

public void init()

Description copied from interface: HasLifecycle

Called from the enclosing Subsystem at initialization phase.

This method is called before the children components of this object have their init method called.

At the time it is called, connection to the messaging layer is not yet done, so there should be no attempt to send messages in the body of this method. Configuration for message listening can nevertheless be done here, such as adding MessageListener objects.

It is unnecessary to call super.init()

Specified by:

init in interface HasLifecycle

Overrides:

init in class Channel

evaluateDerivedValue

public double evaluateDerivedValue()

Description copied from class: DerivedChannel

Callback function to evaluate the derived value.

Specified by:

evaluateDerivedValue in class DerivedChannel

Returns:

the derived value.