FairMQ/examples/MQ/6-multiple-channels
Alexey Rybalchenko 7ab6afa28a Remove compile time transport interface switch
- Remove the compile time check of the transport implementation.
  The transport (zeromq/nanomsg) can be chosen at run time with:
  `device.SetTransport("zeromq"); // possible values are "zeromq" and "nanomsg"`.

  For devices that use FairMQProgOptions, the transport can be configured via cmd option:
  `--transport zeromq` or `--transport nanomsg`. Default values is "zeromq".
  The device receives the configured value with:
  `device.SetTransport(config.GetValue<std::string>("transport"));`

  Old method of setting transport still works. But the NANOMSG constant is not defined.

- Remove old `fairmq/prototest` directory. It was only used as a test for protobuf.
  The protobuf part of Tutorial3 does the same (with different values).

- Fix a bug in FairMQPollerNN, where the `revents` value was not initialized.
  This caused the `poller->CheckOutput()` to trigger when it should not.
2018-05-02 16:12:57 +02:00
..
CMakeLists.txt Remove compile time transport interface switch 2018-05-02 16:12:57 +02:00
ex6-multiple-channels.json Rename /example to /examples and move MQ examples in it 2018-05-02 16:12:57 +02:00
FairMQExample6Broadcaster.cxx Rename /example to /examples and move MQ examples in it 2018-05-02 16:12:57 +02:00
FairMQExample6Broadcaster.h Rename /example to /examples and move MQ examples in it 2018-05-02 16:12:57 +02:00
FairMQExample6Sampler.cxx Rename /example to /examples and move MQ examples in it 2018-05-02 16:12:57 +02:00
FairMQExample6Sampler.h Rename /example to /examples and move MQ examples in it 2018-05-02 16:12:57 +02:00
FairMQExample6Sink.cxx Rename /example to /examples and move MQ examples in it 2018-05-02 16:12:57 +02:00
FairMQExample6Sink.h Rename /example to /examples and move MQ examples in it 2018-05-02 16:12:57 +02:00
README.md Rename /example to /examples and move MQ examples in it 2018-05-02 16:12:57 +02:00
runExample6Broadcaster.cxx Remove compile time transport interface switch 2018-05-02 16:12:57 +02:00
runExample6Sampler.cxx Remove compile time transport interface switch 2018-05-02 16:12:57 +02:00
runExample6Sink.cxx Remove compile time transport interface switch 2018-05-02 16:12:57 +02:00

Example 6: Multiple Channels

This example demonstrates how to work with multiple channels and multiplex between them.

A topology of three devices - Sampler, Sink and Broadcaster. The Sampler sends data to the Sink via the PUSH-PULL pattern. The Broadcaster device sends a message to both Sampler and Sink containing a string "OK" every second. The Broadcaster sends the message via PUB pattern. Both Sampler and Sink, besides doing their PUSH-PULL job, listen via SUB to the Broadcaster.

The multiplexing between their data channels and the broadcast channels happens with FairMQPoller.