C

Routing Service Constrained WAN Example

A demonstration of Routing Service that shows how data can be constrained over a WAN network.
r
Fri, 06/05/2020 - 14:09
4934 reads — 0 comments

Recursive Data Type

Some data-types are recursive in the sense that they contain members elements of the same data-type as the containing structure. A classic example is a Tree. While recursive data-types are not officially supported by RTI Connext DDS it is possible to use them in RTI Connext DDS 5.2. This example illustrates an approach to represent them utilizing some advanced features of rtiddsgen.
Gerardo Pardo
Fri, 11/06/2015 - 14:12
8226 reads — 0 comments

Ordered Presentation Group

Sometimes, you may want a set of data for the same DataWriter to be presented to the receiving DataReader only after ALL the elements of the set have been received. In this example we illustrate how to use Group access_scope for the order in which samples are presented to the subscribing application.
sonia
Fri, 11/14/2014 - 16:29
10168 reads — 2 comments

WaitSet with Query Condition

This is a simple example that shows how to receive notifications about data becoming available using a Query Condition. QueryConditions use the same SQL-based filtering syntax as ContentFilteredTopics for query expressions, parameters, etc. Unlike ContentFilteredTopics, QueryConditions are applied to data already received, so they do not affect the reception of data.
angel
Mon, 09/08/2014 - 10:52
9658 reads — 0 comments

Content Filtered Topic -- String Filter

A Content Filtered Topic is a Topic with filtering properties. It makes it possible to subscribe to topics and at the same time specify that you are only interested in a subset of the Topic's data. This example explains how to use the built-in StringMatch filter that can be used with ContentFilteredTopics.
angel
Mon, 07/07/2014 - 04:19
19494 reads — 3 comments

Coherent Presentation

This example illustrates how to use coherency QoS to force writes to be grouped on the receiving side. Suppose the reader is tracking the state of an object with many fields. If changes to fields occur relatively infrequently, it is inefficient to send the entire state on every update. Instead, we send an ID for the object, an ID for the field to be updated, and the new value.
angel
Mon, 07/07/2014 - 04:06
8212 reads — 0 comments

Batching and Turbo Mode

Batching can be used to decrease the amount of communication overhead associated with the transmission and acknowledgement of small samples, in order to increase throughput. In this example we explain how to use the batching QoS setting as well as "Turbo Mode", an experimental feature that adjusts automatically the number of bytes in a batch.
angel
Mon, 07/07/2014 - 03:19
8540 reads — 0 comments

Persistent Storage

This example illustrates the three different approaches RTI Connext DDS implements to store data persistently. That is, Durable Write History, Durable Reader State, and Persistence Service.
sara
Fri, 06/13/2014 - 09:58
11215 reads — 0 comments

Custom Content Filters

Unlike Content Filter Topics, Custom Content Filters allow the use of non-relational operations between topic members, i.e. a computation involving topic members. In this example we create a Custom Content Filter takes an expression "%0 %1 x", where %0 is an integer, %1 is "divides" or "greater-than", and the "x" is the field we are comparing in the sample. The filter lets samples through if the parameter[0] divides or is greater than x, respectively.
angel
Wed, 05/21/2014 - 15:42
9289 reads — 0 comments

Custom Flow Controllers

A FlowController is the object responsible for shaping the network traffic by determining when attached asynchronous DataWriters are allowed to write data. This example shows how to create a custom flow controllers to manage an asynchronous publisher.
angel
Wed, 05/21/2014 - 15:30
8475 reads — 1 comment

Pages

Subscribe to RSS - C