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/*
 * 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.
 *
 * 

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. * *

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. *

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. *

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. *

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





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