org.omg.dds.core.status

Class LivelinessChangedStatus

java.lang.Object

org.omg.dds.core.status.Status

org.omg.dds.core.status.LivelinessChangedStatus

All Implemented Interfaces:

Serializable, DDSObject

public abstract class LivelinessChangedStatus
extends Status

The liveliness of one or more DataWriters that were writing instances read through the DataReader has changed. Some DataWriter(s) have become "active" or "inactive."

See Also:

LivelinessChangedEvent, LivelinessLostStatus, Serialized Form

Constructor Summary

Constructors

Constructor and Description
LivelinessChangedStatus()

Method Summary

Methods

Modifier and Type	Method and Description
abstract int	getAliveCount() The total number of currently active DataWriters that write the Topic read by the DataReader.
abstract int	getAliveCountChange() The change in the aliveCount since the last time the listener was called or the status was read.
abstract InstanceHandle	getLastPublicationHandle() Handle to the last DataWriter whose change in liveliness caused this status to change.
abstract int	getNotAliveCount() The total count of currently DataWriters that write the Topic read by the DataReader that are no longer asserting their liveliness.
abstract int	getNotAliveCountChange() The change in the notAliveCount since the last time the listener was called or the status was read.

Methods inherited from class org.omg.dds.core.status.Status

allStatuses, noStatuses

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.omg.dds.core.DDSObject

getEnvironment

Constructor Detail

LivelinessChangedStatus

public LivelinessChangedStatus()

Method Detail

getAliveCount

public abstract int getAliveCount()

The total number of currently active DataWriters that write the Topic read by the DataReader. This count increases when a newly matched DataWriter asserts its liveliness for the first time or when a DataWriter previously considered to be not alive reasserts its liveliness. The count decreases when a DataWriter considered alive fails to assert its liveliness and becomes not alive, whether because it was deleted normally or for some other reason.

getNotAliveCount

public abstract int getNotAliveCount()

The total count of currently DataWriters that write the Topic read by the DataReader that are no longer asserting their liveliness. This count increases when a DataWriter considered alive fails to assert its liveliness and becomes not alive for some reason other than the normal deletion of that DataWriter. It decreases when a previously not alive DataWriter either reasserts its liveliness or is deleted normally.

getAliveCountChange

public abstract int getAliveCountChange()

The change in the aliveCount since the last time the listener was called or the status was read.

getNotAliveCountChange

public abstract int getNotAliveCountChange()

The change in the notAliveCount since the last time the listener was called or the status was read.

getLastPublicationHandle

public abstract InstanceHandle getLastPublicationHandle()

Handle to the last DataWriter whose change in liveliness caused this status to change.