org.apache.hadoop.hive.metastore.MetastoreTaskThread 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,
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*/
package org.apache.hadoop.hive.metastore;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.conf.Configuration;
import java.util.concurrent.TimeUnit;
/**
* Any task that will run as a separate thread in the metastore should implement this
* interface.
*/
public interface MetastoreTaskThread extends Configurable, Runnable {
/**
* Get the frequency at which the thread should be scheduled in the thread pool. You must call
* {@link #setConf(Configuration)} before calling this method.
* @param unit TimeUnit to express the frequency in.
* @return frequency
*/
long runFrequency(TimeUnit unit);
}