Design Patterns and Best Practices in Java

The do operator

These are used to register an action to take upon a specific life cycle event. We can use them to mimic the final statement behavior, release resources allocated upstream, do performance measurements, or do other tasks that do not depend on the success of the current call. RxJava Observables enable this by providing the following methods:

• doFinally: Registers an action to be called when the current Observable invokes either onComplete or onError or gets disposed
• doAfterTerminate: Registers an action to be called after the current Observable invokes either onComplete or onError
• doOnDispose: Registers an action to be called when the sequence is disposed
• doOnLifecycle: Registers callbacks for the appropriate onXXX method, depending ...