org.apache.hadoop.hive.metastore.MaterializationsCacheCleanerTask Maven / Gradle / Ivy

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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 org.apache.hadoop.hive.metastore;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.metastore.conf.MetastoreConf;
import com.facebook.presto.hive.$internal.org.slf4j.Logger;
import com.facebook.presto.hive.$internal.org.slf4j.LoggerFactory;

import java.util.concurrent.TimeUnit;

/**
 * Task responsible for cleaning the transactions that are not useful from the
 * materializations cache.
 */
public class MaterializationsCacheCleanerTask implements MetastoreTaskThread {
  private static final Logger LOG = LoggerFactory.getLogger(MaterializationsCacheCleanerTask.class);

  private Configuration conf;

  @Override
  public long runFrequency(TimeUnit unit) {
    return MetastoreConf.getTimeVar(conf,
        MetastoreConf.ConfVars.MATERIALIZATIONS_INVALIDATION_CACHE_CLEAN_FREQUENCY, unit);
  }

  @Override
  public void setConf(Configuration configuration) {
    conf = configuration;
  }

  @Override
  public Configuration getConf() {
    return conf;
  }

  @Override
  public void run() {
    long removedCnt = MaterializationsInvalidationCache.get().cleanup(System.currentTimeMillis() -
        MetastoreConf.getTimeVar(conf,
            MetastoreConf.ConfVars.MATERIALIZATIONS_INVALIDATION_CACHE_EXPIRY_DURATION, TimeUnit.MILLISECONDS));
    if (removedCnt > 0) {
      if (LOG.isDebugEnabled()) {
        LOG.debug("Number of transaction entries deleted from materializations cache: " + removedCnt);
      }
    }
  }
}