DurabilityQosPolicyKind Class Reference
[DURABILITY]

Kinds of durability. More...

Inheritance diagram for DurabilityQosPolicyKind:

List of all members.

Static Public Attributes
static final DurabilityQosPolicyKind	VOLATILE_DURABILITY_QOS
	[default] RTI Connext does not need to keep any samples of data instances on behalf of any com.rti.dds.subscription.DataReader that is unknown by the com.rti.dds.publication.DataWriter at the time the instance is written.
static final DurabilityQosPolicyKind	TRANSIENT_LOCAL_DURABILITY_QOS
	RTI Connext will attempt to keep some samples so that they can be delivered to any potential late-joining com.rti.dds.subscription.DataReader.
static final DurabilityQosPolicyKind	TRANSIENT_DURABILITY_QOS
	RTI Connext will attempt to keep some samples so that they can be delivered to any potential late-joining com.rti.dds.subscription.DataReader.
static final DurabilityQosPolicyKind	PERSISTENT_DURABILITY_QOS
	Data is kept on permanent storage, so that they can outlive a system session.

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Detailed Description

Kinds of durability.

QoS:

com.rti.dds.infrastructure.DurabilityQosPolicy

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Member Data Documentation

final DurabilityQosPolicyKind VOLATILE_DURABILITY_QOS [static]

[default] RTI Connext does not need to keep any samples of data instances on behalf of any com.rti.dds.subscription.DataReader that is unknown by the com.rti.dds.publication.DataWriter at the time the instance is written.

In other words, RTI Connext will only attempt to provide the data to existing subscribers.

final DurabilityQosPolicyKind TRANSIENT_LOCAL_DURABILITY_QOS [static]

RTI Connext will attempt to keep some samples so that they can be delivered to any potential late-joining com.rti.dds.subscription.DataReader.

Which particular samples are kept depends on other QoS such as com.rti.dds.infrastructure.HistoryQosPolicy and com.rti.dds.infrastructure.ResourceLimitsQosPolicy. RTI Connext is only required to keep the data in memory of the com.rti.dds.publication.DataWriter that wrote the data.

Data is not required to survive the com.rti.dds.publication.DataWriter.

For this setting to be effective, you must also set the com.rti.dds.infrastructure.ReliabilityQosPolicy.kind to ReliabilityQosPolicyKind.RELIABLE_RELIABILITY_QOS.

final DurabilityQosPolicyKind TRANSIENT_DURABILITY_QOS [static]

RTI Connext will attempt to keep some samples so that they can be delivered to any potential late-joining com.rti.dds.subscription.DataReader.

Which particular samples are kept depends on other QoS such as com.rti.dds.infrastructure.HistoryQosPolicy and com.rti.dds.infrastructure.ResourceLimitsQosPolicy. RTI Connext is only required to keep the data in memory and not in permanent storage.

Data is not tied to the lifecycle of the com.rti.dds.publication.DataWriter.

Data will survive the com.rti.dds.publication.DataWriter.

final DurabilityQosPolicyKind PERSISTENT_DURABILITY_QOS [static]

Data is kept on permanent storage, so that they can outlive a system session.