alluxio.worker.netty.ClosableResourceChannelListener.java Source code

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Here is the source code for alluxio.worker.netty.ClosableResourceChannelListener.java

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/*
 * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
 * (the "License"). You may not use this work except in compliance with the License, which is
 * available at www.apache.org/licenses/LICENSE-2.0
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied, as more fully set forth in the License.
 *
 * See the NOTICE file distributed with this work for information regarding copyright ownership.
 */

package alluxio.worker.netty;

import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;

import java.io.Closeable;

import javax.annotation.concurrent.ThreadSafe;

/**
 * A listener that will close the given resource when the operation completes. This class accepts
 * null resources.
 */
@ThreadSafe
final class ClosableResourceChannelListener implements ChannelFutureListener {
    private final Closeable mResource;

    /**
     * Creates a new instance of {@link ClosableResourceChannelListener}.
     *
     * @param resource the resource to close
     */
    ClosableResourceChannelListener(Closeable resource) {
        mResource = resource;
    }

    @Override
    public void operationComplete(ChannelFuture future) throws Exception {
        if (mResource != null) {
            mResource.close();
        }
    }
}