com.cloudera.impala.catalog.HdfsCachePool.java Source code

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Here is the source code for com.cloudera.impala.catalog.HdfsCachePool.java

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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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.cloudera.impala.catalog;

import org.apache.hadoop.hdfs.protocol.CachePoolInfo;

import com.cloudera.impala.thrift.TCatalogObjectType;
import com.cloudera.impala.thrift.THdfsCachePool;
import com.google.common.base.Preconditions;

/**
 * Represents an HDFS cache pool (CachePoolInfo class). Currently, the only metadata we
 * care about for cache pools is the cache pool name. In the future it may be desirable
 * to track additional metadata such as the owner, size, and current usage of the pool.
 */
public class HdfsCachePool implements CatalogObject {
    private long catalogVersion_;
    private final THdfsCachePool cachePool_;

    public HdfsCachePool(CachePoolInfo cachePoolInfo) {
        cachePool_ = new THdfsCachePool(cachePoolInfo.getPoolName());
    }

    public HdfsCachePool(THdfsCachePool cachePool) {
        Preconditions.checkNotNull(cachePool);
        cachePool_ = cachePool;
    }

    @Override
    public TCatalogObjectType getCatalogObjectType() {
        return TCatalogObjectType.HDFS_CACHE_POOL;
    }

    public THdfsCachePool toThrift() {
        return cachePool_;
    }

    public static HdfsCachePool fromThrift(THdfsCachePool cachePool) {
        return new HdfsCachePool(cachePool);
    }

    @Override
    public String getName() {
        return cachePool_.getPool_name();
    }

    @Override
    public long getCatalogVersion() {
        return catalogVersion_;
    }

    @Override
    public void setCatalogVersion(long newVersion) {
        catalogVersion_ = newVersion;
    }

    @Override
    public boolean isLoaded() {
        return true;
    }
}