?? semaphore.java
字號:
/* * Copyright 2004-2005 OpenSymphony * * 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. * *//* * Previously Copyright (c) 2001-2004 James House */package org.quartz.impl.jdbcjobstore;import java.sql.Connection;/** * An interface for providing thread/resource locking in order to protect * resources from being altered by multiple threads at the same time. * * @author jhouse */public interface Semaphore { /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * Interface. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ /** * Grants a lock on the identified resource to the calling thread (blocking * until it is available). * * @return true if the lock was obtained. */ boolean obtainLock(Connection conn, String lockName) throws LockException; /** * Release the lock on the identified resource if it is held by the calling * thread. */ void releaseLock(Connection conn, String lockName) throws LockException; /** * Determine whether the calling thread owns a lock on the identified * resource. */ boolean isLockOwner(Connection conn, String lockName) throws LockException;}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -