DurabilityServiceQosPolicy Class Reference
[DURABILITY_SERVICE]

Various settings to configure the external RTI Persistence Service used by RTI Connext for DataWriters with a com.rti.dds.infrastructure.DurabilityQosPolicy setting of DurabilityQosPolicyKind.PERSISTENT_DURABILITY_QOS or DurabilityQosPolicyKind.TRANSIENT_DURABILITY_QOS. More...

Inheritance diagram for DurabilityServiceQosPolicy:

List of all members.

Public Attributes
final Duration_t	service_cleanup_delay
	[Not supported (optional)] Controls when the service is able to remove all information regarding a data instances.
HistoryQosPolicyKind	history_kind
	The kind of history to apply in recouping durable data.
int	history_depth
	Part of history QoS policy to apply when feeding a late joiner.
int	max_samples
	Part of resource limits QoS policy to apply when feeding a late joiner.
int	max_instances
	Part of resource limits QoS policy to apply when feeding a late joiner.
int	max_samples_per_instance
	Part of resource limits QoS policy to apply when feeding a late joiner.

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Detailed Description

Various settings to configure the external RTI Persistence Service used by RTI Connext for DataWriters with a com.rti.dds.infrastructure.DurabilityQosPolicy setting of DurabilityQosPolicyKind.PERSISTENT_DURABILITY_QOS or DurabilityQosPolicyKind.TRANSIENT_DURABILITY_QOS.

Entity:

com.rti.dds.topic.Topic, com.rti.dds.publication.DataWriter

Properties:

RxO = NO
Changeable = UNTIL ENABLE

See also:

DURABILITY

HISTORY

RESOURCE_LIMITS

Usage

When a DataWriter's com.rti.dds.infrastructure.DurabilityQosPolicy.kind is DurabilityQosPolicyKind.PERSISTENT_DURABILITY_QOS or DurabilityQosPolicyKind.TRANSIENT_DURABILITY_QOS, an external service, the RTI Persistence Service, is used to store and possibly forward the data sent by the com.rti.dds.publication.DataWriter to com.rti.dds.subscription.DataReader objects that are created after the data was initially sent.

This QoS policy is used to configure certain parameters of the Persistence Service when it operates on the behalf of the com.rti.dds.publication.DataWriter, such as how much data to store. For example, it configures the HISTORY and the RESOURCE_LIMITS used by the fictitious DataReader and DataWriter used by the Persistence Service. Note, however, that the Persistence Service itself may be configured to ignore these values and instead use values from its own configuration file.

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Member Data Documentation

final Duration_t service_cleanup_delay

Initial value:

 new Duration_t(
        Duration_t.DURATION_INFINITE_SEC, Duration_t.DURATION_INFINITE_NSEC)

[Not supported (optional)] Controls when the service is able to remove all information regarding a data instances.

[default] 0

HistoryQosPolicyKind history_kind

The kind of history to apply in recouping durable data.

[default] HistoryQosPolicyKind.KEEP_LAST_HISTORY_QOS

int history_depth

Part of history QoS policy to apply when feeding a late joiner.

[default] 1

int max_samples

Part of resource limits QoS policy to apply when feeding a late joiner.

[default] ResourceLimitsQosPolicy.LENGTH_UNLIMITED

int max_instances

Part of resource limits QoS policy to apply when feeding a late joiner.

[default] ResourceLimitsQosPolicy.LENGTH_UNLIMITED

int max_samples_per_instance

Part of resource limits QoS policy to apply when feeding a late joiner.

[default] ResourceLimitsQosPolicy.LENGTH_UNLIMITED