Package org.epics.archiverappliance.engine.model

Class MonitoredArchiveChannel

java.lang.Object

org.epics.archiverappliance.engine.model.ArchiveChannel

org.epics.archiverappliance.engine.model.MonitoredArchiveChannel

public class MonitoredArchiveChannel
extends ArchiveChannel

An ArchiveChannel that stores each incoming value.

Version:

Initial version:CSS, 4-Jun-2012, Luofeng Li:added codes to support for the new archiver

Author:

Kay Kasemir

Field Summary

Fields inherited from class org.epics.archiverappliance.engine.model.ArchiveChannel

lastDBRTimeEvent, latestDBRTimeEvent, pvMetrics, SAVE_META_DATA_PERIOD_SECS

Constructor Summary

Constructors

Constructor	Description
MonitoredArchiveChannel(String name, Writer writer, int buffer_capacity, Instant last_archived_timestamp, double period_estimate, ConfigService configservice, ArchDBRTypes archdbrtype, String controlPVname, int commandThreadID, boolean usePVAccess)

Method Summary

Modifier and Type	Method	Description
String	getMechanism()
protected boolean	handleNewValue(DBRTimeEvent timeevent)	Attempt to add each new value to the buffer.

Methods inherited from class org.epics.archiverappliance.engine.model.ArchiveChannel

aboutToWriteBuffer, addValueToBuffer, getConnectedMetaChannelCount, getControlPVname, getCurrentCopyOfMetaFields, getHostName, getJCACommandThreadID, getLastArchivedValue, getLatestMetadata, getLowLevelChannelStateInfo, getMetaChannelCount, getMetaPVNames, getName, getPVData, getPVMetrics, getSampleBuffer, getSecondsElapsedSinceSearchRequest, getWriter, handleDisconnected, initializeMetaFieldPVS, isConnected, isMetaPVConnected, isPaused, metaChannelsNeedStartingUp, reset, setlastRotateLogsEpochSeconds, setPaused, shutdownMetaChannels, start, startUpMetaChannels, stop, toString, updateMetadataOnceADay

Methods inherited from class java.lang.Object

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

Constructor Details

MonitoredArchiveChannel

public MonitoredArchiveChannel(String name,
 Writer writer,
 int buffer_capacity,
 Instant last_archived_timestamp,
 double period_estimate,
 ConfigService configservice,
 ArchDBRTypes archdbrtype,
 String controlPVname,
 int commandThreadID,
 boolean usePVAccess)
                        throws Exception

Parameters:

name - pv's name

writer - the writer for this pv

buffer_capacity - the sample buffer's capacity for this pv

last_archived_timestamp - the last time stamp when this pv was archived

period_estimate -  

configservice - the configservice of new archiver

archdbrtype - the archiving dbr type

controlPVname - the pv's name who control this pv to start archiving or stop archiving

commandThreadID - - this is the index into the array of JCA command threads that processes this context.

usePVAccess - - Should we use PVAccess to connect to this PV.

Throws:

Exception - error when creating archive channel for this pv

See Also:

• ArchiveChannel(java.lang.String, org.epics.archiverappliance.Writer, int, java.time.Instant, org.epics.archiverappliance.config.ConfigService, org.epics.archiverappliance.config.ArchDBRTypes, java.lang.String, int, boolean)

Method Details

getMechanism

public String getMechanism()

Specified by:

getMechanism in class ArchiveChannel

Returns:

Short description of sample mechanism

handleNewValue

protected boolean handleNewValue(DBRTimeEvent timeevent)

Attempt to add each new value to the buffer.

Overrides:

handleNewValue in class ArchiveChannel

Parameters:

timeevent - DBRTimeEvent

Returns:

true if the value was already written because it's the first value after startup or error, so there's no need to write that sample again.