001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.client;
019
020import java.util.concurrent.CompletableFuture;
021import org.apache.hadoop.conf.Configuration;
022import org.apache.hadoop.hbase.RegionLocations;
023import org.apache.hadoop.hbase.ServerName;
024import org.apache.yetus.audience.InterfaceAudience;
025
026/**
027 * Registry that does nothing. Otherwise, default Registry wants zookeeper up and running.
028 */
029@InterfaceAudience.Private
030class DoNothingConnectionRegistry implements ConnectionRegistry {
031
032  public DoNothingConnectionRegistry(Configuration conf) {
033  }
034
035  @Override
036  public CompletableFuture<RegionLocations> getMetaRegionLocations() {
037    return CompletableFuture.completedFuture(null);
038  }
039
040  @Override
041  public CompletableFuture<String> getClusterId() {
042    return CompletableFuture.completedFuture(null);
043  }
044
045  @Override
046  public CompletableFuture<ServerName> getActiveMaster() {
047    return CompletableFuture.completedFuture(null);
048  }
049
050  @Override
051  public String getConnectionString() {
052    return "nothing";
053  }
054
055  @Override
056  public void close() {
057  }
058}