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Spring Framework example source code file (Lifecycle.java)

This example Spring Framework source code file (Lifecycle.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

lifecycle, lifecycle

The Spring Framework Lifecycle.java source code

/*
 * Copyright 2002-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.context;

/**
 * Interface defining methods for start/stop lifecycle control.
 * The typical use case for this is to control asynchronous processing.
 *
 * <p>Can be implemented by both components (typically a Spring bean defined in
 * a Spring {@link org.springframework.beans.factory.BeanFactory}) and containers
 * (typically a Spring {@link ApplicationContext}). Containers will propagate
 * start/stop signals to all components that apply.
 *
 * <p>Can be used for direct invocations or for management operations via JMX.
 * In the latter case, the {@link org.springframework.jmx.export.MBeanExporter}
 * will typically be defined with an
 * {@link org.springframework.jmx.export.assembler.InterfaceBasedMBeanInfoAssembler},
 * restricting the visibility of activity-controlled components to the Lifecycle
 * interface.
 *
 * @author Juergen Hoeller
 * @since 2.0
 * @see ConfigurableApplicationContext
 * @see org.springframework.jms.listener.AbstractMessageListenerContainer
 * @see org.springframework.scheduling.quartz.SchedulerFactoryBean
 */
public interface Lifecycle {

	/**
	 * Start this component.
	 * Should not throw an exception if the component is already running.
	 * <p>In the case of a container, this will propagate the start signal
	 * to all components that apply.
	 */
	void start();

	/**
	 * Stop this component.
	 * Should not throw an exception if the component isn't started yet.
	 * <p>In the case of a container, this will propagate the stop signal
	 * to all components that apply.
	 */
	void stop();

	/**
	 * Check whether this component is currently running.
	 * <p>In the case of a container, this will return true
	 * only if <i>all components that apply are currently running.
	 * @return whether the component is currently running
	 */
	boolean isRunning();

}

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