RTI DDS Spy is a command-line utility that can subscribe to select DDS topics and display data samples it receives to the terminal. It enables inspection of data that applications are publishing.
DDS Spy is invaluable when debugging thorny problems with DDS applications. It is a versatile tool that can monitor publication of all DDS data from an application. Users can narrow down the problem space by filtering data by topic, setting Quality of Service (QoS) profiles, monitoring specific Data Distribution ServiceTM (DDS) domains, along with many other options.