/**
* 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.messaging.event.filters;
import org.apache.hadoop.hive.metastore.api.NotificationEvent;
/**
* Utility function that constructs a notification filter to match a given db name and/or table name.
* If dbName == null, fetches all warehouse events.
* If dnName != null, but tableName == null, fetches all events for the db
* If dbName != null && tableName != null, fetches all events for the specified table
*/
public class DatabaseAndTableFilter extends BasicFilter {
private final String databaseName, tableName;
public DatabaseAndTableFilter(final String databaseName, final String tableName) {
this.databaseName = databaseName;
this.tableName = tableName;
}
@Override
boolean shouldAccept(final NotificationEvent event) {
if (databaseName == null) {
return true; // if our dbName is null, we're interested in all wh events
}
if (databaseName.equalsIgnoreCase(event.getDbName())) {
if ((tableName == null)
// if our dbName is equal, but tableName is blank, we're interested in this db-level event
|| (tableName.equalsIgnoreCase(event.getTableName()))
// table level event that matches us
) {
return true;
}
}
return false;
}
}