Debug only : dumps all the seen events to STDOUTS

Blocks until one or more interests are satisfied.

interests must be an array of interests. Please refer to Engine#wait_for documentation for allowed values of each interest.

If multiple interests are given, wait_for blocks until all of the interests are satisfied.

wait_for may only be used by one thread at a time. If one thread calls wait_for and later another thread calls wait_for while the first thread is waiting, the first thread‘s interests are lost and the first thread will never wake up.

Checks whether message msg matches any of interests being waited for.

Some interests look for actions on particular workflows (e.g., waiting for some workflow to finish). Other interests are not attached to any particular workflow (e.g., :inactive waits until the engine finishes processing all active and pending workflows) but are still satisfied when actions happen on workflows (e.g., the last workflow being run finishes).

Returns true if all interests being waited for have been satisfied, false otherwise.