RTI Connext Java API
Version 7.0.0
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Configures the mechanism that sends user data in an external middleware thread. More...
Public Attributes | |
boolean | disable_asynchronous_write |
Disable asynchronous publishing. More... | |
final ThreadSettings_t | thread |
Settings of the publishing thread. More... | |
boolean | disable_asynchronous_batch |
Disable asynchronous batch flushing. More... | |
final ThreadSettings_t | asynchronous_batch_thread |
Settings of the batch flushing thread. More... | |
boolean | disable_topic_query_publication |
Disable topic query publication. More... | |
final ThreadSettings_t | topic_query_publication_thread |
Settings of the com.rti.dds.subscription.TopicQuery publication thread. More... | |
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final QosPolicyId_t | id |
The ID of this QoS policy. More... | |
final String | policy_name |
The name of this QoS policy. More... | |
Configures the mechanism that sends user data in an external middleware thread.
Specifies the asynchronous publishing and asynchronous batch flushing settings of the com.rti.dds.publication.Publisher instances.
The QoS policy specifies whether asynchronous publishing and asynchronous batch flushing are enabled for the com.rti.dds.publication.DataWriter entities belonging to this com.rti.dds.publication.Publisher. If so, the publisher will spawn up to two threads, one for asynchronous publishing and one for asynchronous batch flushing.
This policy also configures the settings of the com.rti.dds.subscription.TopicQuery publication thread. The publisher will spawn this thread only if one or more DataWriters enable TopicQueries.
Changeable = NO
You can use this QoS policy to reduce the amount of time your application thread spends sending data.
You can also use it, along with com.rti.dds.infrastructure.PublishModeQosPolicy and a com.rti.dds.publication.FlowController, to send large data reliably. "Large" in this context means that the data that cannot be sent as a single packet by a network transport. For example, to send data larger than 63K reliably using UDP/IP, you must configure RTI Connext to fragment the data and send it asynchronously.
The asynchronous publisher thread is shared by all com.rti.dds.infrastructure.PublishModeQosPolicyKind.PublishModeQosPolicyKind.ASYNCHRONOUS_PUBLISH_MODE_QOS com.rti.dds.publication.DataWriter instances that belong to this publisher and handles their data transmission chores.
The asynchronous batch flushing thread is shared by all com.rti.dds.publication.DataWriter instances with batching enabled that belong to this publisher.
This QoS policy also allows you to adjust the settings of the asynchronous publishing and the asynchronous batch flushing threads. To use different threads for two different com.rti.dds.publication.DataWriter entities, the instances must belong to different com.rti.dds.publication.Publisher instances.
A com.rti.dds.publication.Publisher must have asynchronous publishing enabled for its com.rti.dds.publication.DataWriter instances to write asynchronously.
A com.rti.dds.publication.Publisher must have asynchronous batch flushing enabled in order to flush the batches of its com.rti.dds.publication.DataWriter instances asynchronously. However, no asynchronous batch flushing thread will be started until the first com.rti.dds.publication.DataWriter instance with batching enabled is created from this com.rti.dds.publication.Publisher.
boolean disable_asynchronous_write |
Disable asynchronous publishing.
If set to com.rti.dds.infrastructure.true, any com.rti.dds.publication.DataWriter created with com.rti.dds.infrastructure.PublishModeQosPolicyKind.PublishModeQosPolicyKind.ASYNCHRONOUS_PUBLISH_MODE_QOS will fail with com.rti.dds.infrastructure.RETCODE_INCONSISTENT_POLICY.
[default] com.rti.dds.infrastructure.false
final ThreadSettings_t thread |
Settings of the publishing thread.
There is only one asynchronous publishing thread per com.rti.dds.publication.Publisher.
[default] priority below normal.
The actual value depends on your architecture:
For Windows: -2
For Linux: OS default priority
For a complete list of platform specific values, please refer to Platform Notes.
[default] The actual value depends on your architecture:
For Windows: OS default stack size
For Linux: OS default stack size
For a complete list of platform specific values, please refer to Platform Notes.
[default] mask = com.rti.dds.infrastructure.ThreadSettingsKind.THREAD_SETTINGS_KIND_MASK_DEFAULT
boolean disable_asynchronous_batch |
Disable asynchronous batch flushing.
If set to com.rti.dds.infrastructure.true, any com.rti.dds.publication.DataWriter created with batching enabled will fail with com.rti.dds.infrastructure.RETCODE_INCONSISTENT_POLICY.
If com.rti.dds.infrastructure.BatchQosPolicy.max_flush_delay is different than com.rti.dds.infrastructure.Duration_t.DURATION_INFINITE, com.rti.dds.infrastructure.AsynchronousPublisherQosPolicy.disable_asynchronous_batch must be set com.rti.dds.infrastructure.false.
[default] com.rti.dds.infrastructure.false
final ThreadSettings_t asynchronous_batch_thread |
Settings of the batch flushing thread.
There is only one asynchronous batch flushing thread per com.rti.dds.publication.Publisher.
[default] priority below normal.
The actual value depends on your architecture:
For Windows: -2
For Linux: OS default priority
For a complete list of platform specific values, please refer to Platform Notes. [default] The actual value depends on your architecture:
For Windows: OS default stack size
For Linux: OS default stack size
For a complete list of platform specific values, please refer to Platform Notes.
[default] mask = com.rti.dds.infrastructure.ThreadSettingsKind.THREAD_SETTINGS_KIND_MASK_DEFAULT
boolean disable_topic_query_publication |
Disable topic query publication.
If set to com.rti.dds.infrastructure.true, any com.rti.dds.publication.DataWriter created with com.rti.dds.infrastructure.TopicQueryDispatchQosPolicy.enable set to com.rti.dds.infrastructure.true will fail with com.rti.dds.infrastructure.RETCODE_INCONSISTENT_POLICY.
[default] com.rti.dds.infrastructure.false
final ThreadSettings_t topic_query_publication_thread |
Settings of the com.rti.dds.subscription.TopicQuery publication thread.
There is only one TopicQuery publication thread per com.rti.dds.publication.Publisher. This thread will exist as long as one or more com.rti.dds.publication.DataWriter enables TopicQueries (via com.rti.dds.publication.DataWriterQos.topic_query_dispatch).
[default] priority below normal.
The actual value depends on your architecture:
For Windows: -2
For Linux: OS default priority
For a complete list of platform specific values, please refer to Platform Notes. [default] The actual value depends on your architecture:
For Windows: OS default stack size
For Linux: OS default stack size
For a complete list of platform specific values, please refer to Platform Notes.
[default] mask = com.rti.dds.infrastructure.ThreadSettingsKind.THREAD_SETTINGS_KIND_MASK_DEFAULT