Package org.yamcs.examples.ccsdsframes

Class SampleVcaHandler

java.lang.Object

com.google.common.util.concurrent.AbstractService

org.yamcs.tctm.AbstractLink

org.yamcs.tctm.AbstractTmDataLink

org.yamcs.examples.ccsdsframes.SampleVcaHandler

All Implemented Interfaces:

com.google.common.util.concurrent.Service, SystemParametersProducer, VcDownlinkHandler, Link, TmPacketDataLink

public class SampleVcaHandler
extends AbstractTmDataLink
implements VcDownlinkHandler

Example of a VCA (Virtual Channel Access) handler.

Extracts CCSDS packets from a frame which does not include the first header pointer.

Each frame it starts a new packet decoder.

Nested Class Summary

Nested classes/interfaces inherited from interface org.yamcs.tctm.Link

Link.Status

Nested classes/interfaces inherited from interface com.google.common.util.concurrent.Service

com.google.common.util.concurrent.Service.Listener, com.google.common.util.concurrent.Service.State

Field Summary

Fields inherited from class org.yamcs.tctm.AbstractTmDataLink

packetCount, packetPreprocessor, updateSimulationTime

Fields inherited from class org.yamcs.tctm.AbstractLink

config, disabled, eventProducer, linkName, log, timeService, yamcsInstance

Constructor Summary

Constructors

Constructor	Description
SampleVcaHandler()

Method Summary

Modifier and Type	Method	Description
protected Link.Status	connectionStatus()	In case the link should be connected (i.e. is running and enabled) this method is called to return the actual connection status
protected void	doStart()
protected void	doStop()
void	handle(DownlinkTransferFrame frame)
void	init(String instance, String name, YConfiguration config)	Called at startup to initialize the link.

Methods inherited from class org.yamcs.tctm.AbstractTmDataLink

collectSystemParameters, getDataInCount, getDataOutCount, processPacket, resetCounters, setTmSink, setupSystemParameters, updateStats

Methods inherited from class org.yamcs.tctm.AbstractLink

disable, doDisable, doEnable, enable, getConfig, getCurrentTime, getDetailedStatus, getEventLoop, getLinkStatus, getName, getSystemParameters, isDisabled, isRunningAndEnabled

Methods inherited from class com.google.common.util.concurrent.AbstractService

addListener, awaitRunning, awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, awaitTerminated, doCancelStart, failureCause, isRunning, notifyFailed, notifyStarted, notifyStopped, startAsync, state, stopAsync, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.yamcs.tctm.Link

disable, enable, getConfig, getDetailedStatus, getLinkStatus, getName, getParent, getSpec, isDisabled, isEffectivelyDisabled, setParent

Methods inherited from interface org.yamcs.parameter.SystemParametersProducer

getFrequency, getSystemParameters, getSystemParameters

Constructor Details

SampleVcaHandler

public SampleVcaHandler()

Method Details

init

public void init(String instance,
 String name,
 YConfiguration config)

Description copied from interface: Link

Called at startup to initialize the link.

The config corresponds to the map that is under the link definition in yamcs.instance.yaml.

Specified by:

init in interface Link

Overrides:

init in class AbstractTmDataLink

config - - the configuration - cannot be null (but can be empty)

handle

public void handle(DownlinkTransferFrame frame)

Specified by:

handle in interface VcDownlinkHandler

connectionStatus

protected Link.Status connectionStatus()

Description copied from class: AbstractLink

In case the link should be connected (i.e. is running and enabled) this method is called to return the actual connection status

Specified by:

connectionStatus in class AbstractLink

doStart

protected void doStart()

Specified by:

doStart in class com.google.common.util.concurrent.AbstractService

doStop

protected void doStop()

Specified by:

doStop in class com.google.common.util.concurrent.AbstractService