An RxJava hook which enables SLF4J's MDC propagation.

If you're using RxJava ≥ 1.1.7:

RxJavaHooks.setOnScheduleAction(new MdcPropagatingOnScheduleAction());

If you're using RxJava ≤ 1.1.6:

RxJavaPlugins.getInstance().registerSchedulersHook(new RxJavaSchedulersHook() {
  @Override
  public Action0 onSchedule(final Action0 action) {
    return new MdcPropagatingAction(action);
  }
});

Note: Both RxJavaPlugins#getInstance() and RxJavaSchedulersHook#onSchedule(Action0) are deprecated since 1.1.7.

rxjava-slf4j-mdc-hook is available from both JCenter and Maven Central:

Gradle:

compile 'io.github.bmcstdio:rxjava-slf4j-mdc-hook:1.1.2'

Maven:

<dependency>
  <groupId>io.github.bmcstdio</groupId>
  <artifactId>rxjava-slf4j-mdc-hook</artifactId>
  <version>1.1.2</version>
</dependency>

$ git clone https://github.com/brunomcustodio/rxjava-slf4j-mdc-hook.git
$ cd rxjava-slf4j-mdc-hook
$ ./gradlew build

Copyright 2016-2017 brunomcustodio

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.