org.apache.hadoop.service

インタフェース ServiceStateChangeListener

既知の実装クラスのリスト:

LoggingStateChangeListener

@InterfaceAudience.Public
 @InterfaceStability.Stable
public interface ServiceStateChangeListener

Interface to notify state changes of a service.

メソッドのサマリー

修飾子とタイプ	メソッドと説明
void	stateChanged(Service service) Callback to notify of a state change.

メソッドの詳細

stateChanged

void stateChanged(Service service)

Callback to notify of a state change. The service will already have changed state before this callback is invoked. This operation is invoked on the thread that initiated the state change, while the service itself in in a sychronized section.

1. Any long-lived operation here will prevent the service state change from completing in a timely manner.
2. If another thread is somehow invoked from the listener, and that thread invokes the methods of the service (including subclass-specific methods), there is a risk of a deadlock.

パラメータ:

service - the service that has changed.