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A command line utility to output final XML values provided by a QoS Profile for RTI Connext DDS Professional.
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RTI Connext DDS XML Output Utility

A command line utility to output final XML values provided by a QoS Profile for RTI Connext DDS Professional.


In RTI Connext DDS Professional, an application can be configured using an XML QoS (Quality of Service) configuration file. In 6.0.0, XML multiple inheritance (also known as QoS Profile Composition) allows an XML configuration to be composed from multiple QoS Profiles. This enhancement allows greater reusability and flexibility, but you might want to see what your final values are after the composition occurs. This tool helps with that.

This tool allows you to see what the final values (after resolution of inheritance) for XML QoS will be when an entity is created, by pointing at a <qos_profile>. The utility also allows you to see the value of a subtag within one of the standard <xxx_qos> tags by using the '/' separator.


The tool has the following dependencies

  1. RTI Connext DDS Pro v6.0.0 or higher (could work with older versions as well)
  2. CMake v3.5 or higher

Here is how you would compile this utility after cloning it:

Create a build subdirectory and cd into it

mkdir build
cd build

Create the toolchain file to compile for your platform

cmake .. 
    -DCONNEXTDDS_DIR=<RTI Connext DDS installation folder> 
    -DCONNEXTDDS_ARCH=<RTI Connext DDS target architecture installed>


cmake --build .

NOTE: It is not possible to compile this tool against a Windows installation of RTI Connext DDS Professional 6.0.0 due to absence of rtixml2 in the shipped directory. This has been logged internally as an issue and would be fixed in the next major release of the product. For Linux and Mac OS this tool compiles and executes properly.


To ensure easy usage of the utility we have made available prepackaged binaries for Windows, Mac OS and Linux. You can find them under the releases section. These binaries have no external dependencies and can be directly used.


Here are the various options for this utility

Option Explanation Type
qosFile Absolute or relative path of the QoS XML configuration file you want to analyze. You can also specify multiple files by separating them with a semicolon ';' and surrounding them with single quotes. For example: 'file_path_1;file_path_2;file_path_3' OPTIONAL: The standard QoS XML files as defined in the User's manual will still be loaded
outputFile Filename where the utility will output the QoS XML values OPTIONAL: If not specified the output will be to the console
profilePath Fully qualified path of a QoS Profile. For example: QoSLibraryName::QoSProfileName OPTIONAL: The <qos_profile> with is_default_qos="true" will be selected OR the default values will be returned for the -qosTag
qosTag XML tag name who QoS values you want to be fetched. You can also select a subtag by separating it with a '/'. For example: datawriter_qos/history or participant_qos/property REQUIRED: Allowed values = {datawriter_qos, datareader_qos, topic_qos, participant_qos, publisher_qos, subscriber_qos}
topicName Can be used with -qosTag = {datawriter_qos, datareader_qos, topic_qos} OPTIONAL: The default value used with these types will be NULL
help Displays all the options of the rtixmloutpututility OPTIONAL

You should also add the the location of the lib folder to your PATH (Windows) or DYLD_LIBRARY_PATH (Mac) or LD_LIBRARY_PATH (Linux) if you compiled the utility using -DBUILD_SHARED_LIBS=1

export LD_LIBRARY_PATH=<RTI Connext DDS installation folder>/lib/<architecture>:$LD_LIBRARY_PATH

Mac OS
export DYLD_LIBRARY_PATH=<RTI Connext DDS installation folder>/lib/<architecture>:$DYLD_LIBRARY_PATH

set PATH=<RTI Connext DDS installation folder>/lib/<architecture>;%PATH%


Here is a sample usage of the utility on a Linux machine

$ ./rtixmloutpututility 
    -qosFile '/home/xxx/Documents/Tests/CORE-9446/USER_QOS_PROFILES.xml;/home/xxx/Documents/Tests/CORE-1375/USER_QOS_PROFILES.xml'
    -profilePath Data_Library::Data_Profile 
    -qosTag participant_qos/property

Here is the sample output for this command

The parsed arguments are: 
-qosFile 	 '/home/xxx/Documents/Tests/CORE-9446/USER_QOS_PROFILES.xml;/home/xxx/Documents/Tests/CORE-1375/USER_QOS_PROFILES.xml' 
-outputFile 	 '' 
-profilePath 	 'Data_Library'::'Data_Profile' 
-qosTag 	 'participant_qos'/'property' 
-topicName 	 '' 
QoS file names detected are: 
1. file:///home/xxx/Documents/Tests/CORE-9446/USER_QOS_PROFILES.xml 
2. file:///home/xxx/Documents/Tests/CORE-1375/USER_QOS_PROFILES.xml 
            <value>2019-06-17 10:46:02Z</value>
            <value>2019-06-24 11:49:29Z</value>

QoS Profile Inheritance and Composition Guidance

QoS Profile Inheritance and Composition Guidance is a best practice we recommend when organizing your XML QoS Profiles using the mechanisms of single and multiple inheritance. For more information please refer to this knowledge base article.

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