com.wl4g.infra.common.io.FileLocks Maven / Gradle / Ivy
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/*
* Copyright 2017 ~ 2025 the original author or authors. James Wong
*
* 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.infra.common.io;
import com.wl4g.infra.common.function.ProcessFunction;
import static com.wl4g.infra.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 FileLocks}
*
* @author James Wong <[email protected]>
* @author vjay
* @date 2020-03-24
* @since v2.0.0
* @see
*/
public abstract class FileLocks {
/**
* 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);
}
}
}