org.refcodes.component.Stoppable Maven / Gradle / Ivy

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// This code is copyright (c) by Siegfried Steiner, Munich, Germany and licensed
// under the following (see "http://en.wikipedia.org/wiki/Multi-licensing")
// licenses:
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package org.refcodes.component;

/**
 * This mixin might be implemented by a component in order to provide stop
 * facilities.
 */
public interface Stoppable {

	/**
	 * Stops the component.
	 * 
	 * @throws StopException Thrown in case stopping fails.
	 */
	void stop() throws StopException;

	/**
	 * The {@link StopAutomaton} interface defines those methods related to the
	 * stop life-cycle.
	 */
	public interface StopAutomaton extends Stoppable {

		/**
		 * Determines whether the component may get stopped.
		 * 
		 * @return True if {@link #stop()} is possible.
		 */
		boolean isStoppable();

		/**
		 * Determines whether the component is stopped.
		 * 
		 * @return True in case of being stopped, else false.
		 */
		boolean isStopped();
	}

	/**
	 * To enable the {@link Stoppable} functionality to be invoked in a builder
	 * chain.
	 *
	 * @param  The instance to be returned on which to apply succeeding
	 *        builder operations.
	 */
	public interface StopBuilder> {

		/**
		 * Builder method for the {@link Stoppable#stop()} method.
		 * 
		 * @return The instance to be returned on which to apply succeeding
		 *         builder operations.
		 * 
		 * @throws StopException Thrown in case stopping fails.
		 */
		B withStop() throws StopException;
	}

	/**
	 * See {@link Stoppable} without any checked exception being declared.
	 */
	public interface UncheckedStoppable extends Stoppable {

		/**
		 * See {@link Stoppable#stop()} without any checked exception being
		 * declared.
		 */
		void stop();
	}

}