RTI Core Libraries and Utilities

Workaround for discovery failure between RTI Connext DDS Micro 2.4.11 and RTI Connext DDS 6.0.0

In RTI Connext DDS 6.0.0, the RTPS version has been changed to 2.3. This RTPS version is propagated during the discovery process and is verified by the receiving Connext DDS or Connext DDS Micro application to verify compatibility. In Connext DDS Micro 2.4.11 and earlier, this check is hard-coded ...
bobby
Wed, 04/10/2019 - 10:32
42128 reads — 0 comments

Dynamic Data: How to access multi-level nesting elements using C++11

Concept With this example, you will learn how to manage complex objects with several levels of nesting and different kinds of members programmatically on an unknown structure. RTIⓇ ConnextⓇ DDS provides tools to access the different members independently if they are a primitive type, struct type, ...
jmuros
Wed, 04/10/2019 - 09:45
3534 reads — 1 comment

Differences between the Modern and Traditional C++ APIs

The modern C++ API feels very different from the traditional one. Understanding a few key concepts and the main differences with respect to the traditional C++ API can help you write code that is much more concise and robust. The modern C++ API Conventions document describes the intended use of the ...
samr
Tue, 04/02/2019 - 05:05
8463 reads — 2 comments

Using Dynamic or Static Libraries with DDS Secure

When you link your application with the RTI Connext DDS libraries, you can choose whether to use dynamic or static linking. But what is the best approach if you want to use the DDS Secure plug-in? There are some situations that you need to be aware of and avoid. This article describes the possible ...
fabrizio
Wed, 03/27/2019 - 09:34
5294 reads — 0 comments

Why am I receiving LOST_BY_WRITER?

You can find the definition of “LOST_BY_WRITER” in the API: “ A DDSDataWriter removed the sample before being received by the DDSDataReader. This constant is an extension to the DDS standard. ” If you are using KEEP_LAST as the History kind , the reason for this data loss might be the following: ...
isabel
Fri, 03/22/2019 - 00:51
5048 reads — 0 comments

When do I need to send TypeCode or TypeObject?

Note: Applies to Connext DDS 5.x and above Sending TypeCode/TypeObject on the wire provides convenience over specifying the type via XML configuration, but has the disadvantage that more data must be sent during endpoint discovery. This can cause network congestion problems when the TypeCode/ ...
grayson
Thu, 03/14/2019 - 11:48
5658 reads — 0 comments

Checking TCP Connections

The following three configurations are related to detecting issues on the TCP connections. Although they seem similar, they enable different features with subtle differences. Connection Liveliness When the Connection Liveliness feature is enabled, RTI TCP Transport Liveliness Request and Response ...
isabel
Mon, 03/11/2019 - 09:24
3023 reads — 0 comments

Under which circumstances will Connext DDS send non-user data?

When we call DataWriter::write() , we expect to see a user data packet sent on the wire, but under what conditions will Connext DDS send packets of its own accord? There are many reasons why Connext DDS may send messages other than user data. Some of the more common reasons are described below. ...
samr
Mon, 03/04/2019 - 05:48
5026 reads — 0 comments

Updated 5.3.x Security Files

The identity certificates that were shipped with Connext 5.3.1 expired on February 16th, 2019. Therefore, creating a DomainParticipant that tries to use those certificates will fail and will report different problems. This solution documents the most common error messages and provides a set of new certificates, private keys, signed governance, and signed permissions documents valid through February 2029. ...
yusheng
Wed, 02/13/2019 - 13:53
3829 reads — 0 comments

FlatData and ZeroCopy examples

Connext 6 introduces two features: Zero Copy Transfer over Shared Memory and FlatData Language Binding . These features enable the middleware to reduce the number of copies involved in sending a sample, resulting in lower latencies for large data. The following examples show how to use these ...
alexc
Mon, 01/21/2019 - 09:25
47227 reads — 0 comments

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