org.apache.hadoop.hive.ql.lockmgr.HiveLock 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.ql.lockmgr;
import hive.com.google.common.collect.ImmutableList;
import org.apache.hadoop.hive.metastore.api.LockComponent;
import java.util.List;
public abstract class HiveLock {
public abstract HiveLockObject getHiveLockObject();
public abstract HiveLockMode getHiveLockMode();
/**
* Returns true if for this lock implementation, a single lock can in turn
* lock multiple objects, e.g., multi-statement transaction.
*/
public boolean mayContainComponents() {
return false;
}
/**
* Returns the lock components if a single lock can in turn
* lock multiple objects, e.g., multi-statement transaction.
*
* Returns an empty list if the lock does not have multiple
* components.
*/
public List getHiveLockComponents() {
return ImmutableList.of();
}
}