/**
* 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.hbase.client;
import java.util.concurrent.CompletableFuture;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
/**
* The asynchronous version of RegionLocator.
* <p>
* Usually the implementations will not throw any exception directly, you need to get the exception
* from the returned {@link CompletableFuture}.
*/
@InterfaceAudience.Public
public interface AsyncTableRegionLocator {
/**
* Gets the fully qualified table name instance of the table whose region we want to locate.
*/
TableName getName();
/**
* Finds the region on which the given row is being served. Does not reload the cache.
* <p>
* Returns the location of the region to which the row belongs.
* @param row Row to find.
*/
default CompletableFuture<HRegionLocation> getRegionLocation(byte[] row) {
return getRegionLocation(row, false);
}
/**
* Finds the region on which the given row is being served.
* <p>
* Returns the location of the region to which the row belongs.
* @param row Row to find.
* @param reload true to reload information or false to use cached information
*/
CompletableFuture<HRegionLocation> getRegionLocation(byte[] row, boolean reload);
}