/**
* 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.hive.metastore.api.LockComponent;
import org.apache.hadoop.hive.metastore.api.LockLevel;
import org.apache.hadoop.hive.metastore.api.LockType;
/**
* A builder for {@link LockComponent}s
*/
public class LockComponentBuilder {
private LockComponent component;
private boolean tableNameSet;
private boolean partNameSet;
public LockComponentBuilder() {
component = new LockComponent();
tableNameSet = partNameSet = false;
}
/**
* Set the lock to be exclusive.
* @return reference to this builder
*/
public LockComponentBuilder setExclusive() {
component.setType(LockType.EXCLUSIVE);
return this;
}
/**
* Set the lock to be semi-shared.
* @return reference to this builder
*/
public LockComponentBuilder setSemiShared() {
component.setType(LockType.SHARED_WRITE);
return this;
}
/**
* Set the lock to be shared.
* @return reference to this builder
*/
public LockComponentBuilder setShared() {
component.setType(LockType.SHARED_READ);
return this;
}
/**
* Set the database name.
* @param dbName database name
* @return reference to this builder
*/
public LockComponentBuilder setDbName(String dbName) {
component.setDbname(dbName);
return this;
}
/**
* Set the table name.
* @param tableName table name
* @return reference to this builder
*/
public LockComponentBuilder setTableName(String tableName) {
component.setTablename(tableName);
tableNameSet = true;
return this;
}
/**
* Set the partition name.
* @param partitionName partition name
* @return reference to this builder
*/
public LockComponentBuilder setPartitionName(String partitionName) {
component.setPartitionname(partitionName);
partNameSet = true;
return this;
}
/**
* Get the constructed lock component.
* @return lock component.
*/
public LockComponent build() {
LockLevel level = LockLevel.DB;
if (tableNameSet) level = LockLevel.TABLE;
if (partNameSet) level = LockLevel.PARTITION;
component.setLevel(level);
return component;
}
}