org.springframework.webflow.execution.repository.FlowExecutionLock Maven / Gradle / Ivy
/*
* Copyright 2002-2006 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.webflow.execution.repository;
/**
* A pessmistic lock to obtain exclusive rights to a flow execution. Used to
* prevent conflicts when multiple requests to manipulate a flow execution
* arrive from different threads concurrently.
*
* @author Keith Donald
*/
public interface FlowExecutionLock {
/**
* Acquire the flow execution lock. This method will block until the lock
* becomes available for acquisition.
*/
public void lock();
/**
* Release the flow execution lock.
*/
public void unlock();
}