public abstract class AbstractApiService implements ApiService
Base class for ApiService. Similar to Guava's
AbstractService but redeclared so
that Guava can be shaded.
Inheritancejava.lang.Object > AbstractApiService
addListener(ApiService.Listener listener, Executor executor)
public void addListener(ApiService.Listener listener, Executor executor)
Registers a Listener to be executed on the given executor. The listener will have the corresponding transition method called whenever the service changes state. The listener will not have previous state changes replayed, so it is suggested that listeners are added before the service starts.
addListener guarantees execution ordering across calls to a given listener but not
across calls to multiple listeners. Specifically, a given listener will have its callbacks
invoked in the same order as the underlying service enters those states. Additionally, at most
one of the listener's callbacks will execute at once. However, multiple listeners' callbacks
may execute concurrently, and listeners may execute in an order different from the one in which
they were registered.
RuntimeExceptions thrown by a listener will be caught and logged. Any exception thrown during
Executor.execute (e.g., a
RejectedExecutionException) will be caught and
public void awaitRunning()
Waits for the ApiService to reach the running state.
awaitRunning(long timeout, TimeUnit unit)
public void awaitRunning(long timeout, TimeUnit unit)
Waits for the ApiService to reach the running state for no more than the given time.
public void awaitTerminated()
Waits for the ApiService to reach the terminated state.
awaitTerminated(long timeout, TimeUnit unit)
public void awaitTerminated(long timeout, TimeUnit unit)
Waits for the ApiService to reach a terminal state (either terminated or failed) for no more than the given time.
protected abstract void doStart()
protected abstract void doStop()
public Throwable failureCause()
Returns the Throwable that caused this service to fail.
public boolean isRunning()
true if this service is running.
protected void notifyFailed(Throwable cause)
protected void notifyStarted()
protected void notifyStopped()
public ApiService startAsync()
If the service state is State#NEW, this initiates service startup and returns immediately. A stopped service may not be restarted.
public ApiService.State state()
Returns the lifecycle state of the service.
public ApiService stopAsync()
If the service is starting or running, this initiates service shutdown and returns immediately. If the service is new, it is terminated without having been started nor stopped. If the service has already been stopped, this method returns immediately without taking action.