Package org.apache.hadoop.service
@Public
package org.apache.hadoop.service
Support for services.
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ClassDescriptionThis is the base implementation class for services.Composition of services.JVM Shutdown hook for CompositeService which will stop the give CompositeService gracefully in case of JVM shutdown.A serializable lifecycle event: the time a state transition occurred, and what state was entered.This is a state change listener that logs events at INFO levelService LifeCycle.Service statesThis class contains a set of methods to work with services, especially to walk them through their lifecycle.Class to manage a list of
ServiceStateChangeListenerinstances, including a notification loop that is robust against changes to the list during the notification process.Interface to notify state changes of a service.Exception that can be raised on state change operations, whose exit code can be explicitly set, determined from that of any nested cause, or a default value ofLauncherExitCodes.EXIT_SERVICE_LIFECYCLE_EXCEPTION.Implements the service state model.