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Shaded Alluxio Client Module for hadoop 3
/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in alluxio.shaded.client.com.liance with the License, which is
* available at www.apache.alluxio.shaded.client.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.block.alluxio.shaded.client.io.
import alluxio.shaded.client.com.google.alluxio.shaded.client.com.on.base.MoreObjects;
import alluxio.shaded.client.org.slf4j.Logger;
import alluxio.shaded.client.org.slf4j.LoggerFactory;
import java.alluxio.shaded.client.io.Closeable;
import java.alluxio.shaded.client.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Provides basic tracking and representation for block reader/writer clients.
*/
public abstract class BlockClient implements Closeable {
private static final Logger LOG = LoggerFactory.getLogger(BlockClient.class);
/** Used to keep unique client ids. */
private static final AtomicInteger NEXT_CLIENT_ID = new AtomicInteger(0);
/** Internal client id. */
private final int mClientId;
/** the client type. */
private final Type mClientType;
/**
* Creates an abstract block reader/writer.
*
* @param clientType the block client type
*/
public BlockClient(Type clientType) {
mClientId = NEXT_CLIENT_ID.getAndIncrement();
mClientType = clientType;
LOG.debug("BlockClient created: {}.", this);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this)
.add("Id", mClientId)
.add("Type", mClientType.name())
.add("Class", getClass().getName())
.toString();
}
@Override
public void close() throws IOException {
LOG.debug("BlockClient closed: {}.", this);
}
/**
* Block client type.
*/
public enum Type {
READER, WRITER
}
}