RTI Core Libraries and Utilities

Communicating DDS Entities with different type bounds

By default, a DataWriter of an unbounded type won’t be able to communicate with a DataReader of a bounded type. DDS includes the max size of a bounded type as part of the data type information (known as TypeCode or TypeObject). Since the data type information is used during the Discovery phase, if ...
Valentin Perez
Fri, 11/25/2016 - 01:08
5011 reads — 0 comments

What is the purpose of the different GUID and Sequence_Number fields in DDS_SampleInfo?

The DDS_SampleInfo associated with each sample contains the fields original_publication_virtual_guid and original_publication_virtual_sequence_number . This pair forms the SampleIdentity which uniquely identifies each individual sample. When a DataWriter uses write_w_params (), it can explicitly ...
Sandra Rodriguez
Mon, 11/21/2016 - 09:46
5234 reads — 0 comments

Why can't more than 5 DomainParticipants communicate within in the same machine?

If you have more than 5 DomainParticipants in the same machine, you may notice that your applications are not able to communicate with Participant number 6 and following ones. This is because by default we discover up to 5 DomainParticipants in one location. This behavior is controlled by the Peer ...
sonia
Fri, 10/14/2016 - 04:01
9550 reads — 0 comments

What is the difference between QueryConditions and ContentFilteredTopics?

RTI Connext supports two ways of filtering data : using QueryConditions and ContentFilteredTopics . These two options differ in the moment when DDS applies the filter. QueryConditions filter data after the DataReader has received and queued it. That means that the application will receive all ...
Sandra Rodriguez
Wed, 05/25/2016 - 11:04
5864 reads — 2 comments

Types of matching

A ‘match’ between the local and remote entities occurs only if the DataReader and DataWriter have the same Topic , compatible QoS policies, and a compatible data type. By default, type matching is done using the TypeObject . The DataReader’s type must be assignable from the DataWriter’s type. If ...
Sandra Rodriguez
Mon, 03/28/2016 - 06:05
9980 reads — 0 comments

How to use recording console and provide type information to Recorder and Replay

Type object and type code information maximum length can be set in QoS by adding to your QoS file <participant_qos> <resource_limits> <type_code_max_serialized_length>0</type_code_max_serialized_length> <type_object_max_serialized_length>0</ ...
francisco
Mon, 03/14/2016 - 11:10
6592 reads — 0 comments

Why isn't unregister_instance disposing instances with asynchronous publication?

Setting the PUBLISH_MODE QoS Policy's kind to ASYNCHRONOUS_PUBLISH_MODE allows you to make non-blocking write() calls. This means that instead of sending a sample before returning from write() , the data is enqueued and sent according to a flow controller. The HISTORY QoS Policy determines the size ...
Benito Palacios
Thu, 03/10/2016 - 05:44
4415 reads — 0 comments

Installation Guide: Releases and Patches 5.2.0 and later

This solution illustrates how to install host releases, targets, add-ons and patches using rtipkginstall. This solution applies to versions 5.2.0 and later of RTI Connext DDS. ...
rose
Tue, 01/05/2016 - 10:16
13712 reads — 1 comment

What settings affect DomainParticipant’s liveliness?

Participants are able to know when other participants in the same domain are reachable or not (alive or dead). This is called Participant’s Liveliness. Discovery_Config QosPolicy has three properties that define this Participant’s Liveliness behavior: participant_liveliness_assert_period is the ...
Sandra Rodriguez
Fri, 11/27/2015 - 08:30
15124 reads — 0 comments

Configuring QoS with Built-in Profiles

RTI Connext DDS comes with many built-in QoS profiles that allow you to configure your Participants, DataWriters, DataReaders, and Topics for your specific data model and use case. These built-in QoS profiles are documented in your installation, but here is a short description of each one. ...
rose
Tue, 10/20/2015 - 15:28
22623 reads — 0 comments

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