org.apache.hadoop.hive.ql.exec.tez.ObjectCache Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of hive-exec

There is a newer version: 4.0.0

/**
 * 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.ql.exec.tez;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tez.runtime.common.objectregistry.ObjectLifeCycle;
import org.apache.tez.runtime.common.objectregistry.ObjectRegistry;
import org.apache.tez.runtime.common.objectregistry.ObjectRegistryFactory;


/**
 * ObjectCache. Tez implementation based on the tez object registry.
 *
 */
public class ObjectCache implements org.apache.hadoop.hive.ql.exec.ObjectCache {

  private static final Log LOG = LogFactory.getLog(ObjectCache.class.getName());
  private final ObjectRegistry registry = ObjectRegistryFactory.getObjectRegistry();

  @Override
  public void cache(String key, Object value) {
    LOG.info("Adding " + key + " to cache with value " + value);
    registry.add(ObjectLifeCycle.VERTEX, key, value);
  }

  @Override
  public Object retrieve(String key) {
    Object o = registry.get(key);
    if (o != null) {
      LOG.info("Found " + key + " in cache with value: " + o);
    }
    return o;
  }
}