com.wl4g.component.common.io.FileLockUtils Maven / Gradle / Ivy

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/*
 * Copyright 2017 ~ 2025 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 com.wl4g.component.common.io;

import com.wl4g.component.common.function.ProcessFunction;

import static com.wl4g.component.common.lang.Assert2.notNullOf;

import java.io.File;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;

import javax.validation.constraints.NotNull;

/**
 * {@link FileLockUtils}
 * 
 * @author Wangl.sir <[email protected], [email protected]>
 * @author vjay
 * @date 2020-03-24
 * @sine v1.0.0
 * @see
 */
public abstract class FileLockUtils {

	/**
	 * Try file lock.
	 * 
	 * @param file
	 * @param processor
	 * @param 
	 * @return
	 */
	public static  R doTryLock(@NotNull File file, @NotNull ProcessFunction processor) {
		notNullOf(file, "file");
		notNullOf(processor, "processor");
		try (RandomAccessFile raf = new RandomAccessFile(file, "rw");
				FileChannel fileChannel = raf.getChannel();
				FileLock lock = fileChannel.tryLock();) {
			return processor.process(lock);
		} catch (Exception e) {
			throw new IllegalStateException(e);
		}
	}

}