publish_subscribe

Publish-Subscribe

Before proceeding, all dependencies need to be installed. You can find instructions in the C Examples Readme.

Running The Example

This example illustrates a robust publisher-subscriber communication pattern between two separate processes. The publisher sends two messages every second, each containing [TransmissionData]. On the receiving end, the subscriber checks for new data every second.

The subscriber is printing the sample on the console whenever new data arrives.

First you have to build the C examples:

cmake -S . -B target/ffi/build -DBUILD_EXAMPLES=ON
cmake --build target/ffi/build

To observe this dynamic communication in action, open two separate terminals and execute the following commands:

Terminal 1

./target/ffi/build/examples/c/publish_subscribe/example_c_publish_subscribe_subscriber

Terminal 2

./target/ffi/build/examples/c/publish_subscribe/example_c_publish_subscribe_publisher

Feel free to run multiple instances of publisher or subscriber processes simultaneously to explore how iceoryx2 handles publisher-subscriber communication efficiently.

You may hit the maximum supported number of ports when too many publisher or subscriber processes run. Take a look at the iceoryx2 config to set the limits globally or at the API of the Service builder to set them for a single service.