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.hadoop.hbase.security.User;
025import org.apache.yetus.audience.InterfaceAudience;
026
027/**
028 * Registry that does nothing. Otherwise, default Registry wants zookeeper up and running.
029 */
030@InterfaceAudience.Private
031public class DoNothingConnectionRegistry implements ConnectionRegistry {
032
033  public DoNothingConnectionRegistry(Configuration conf, User user) {
034  }
035
036  @Override
037  public CompletableFuture<RegionLocations> getMetaRegionLocations() {
038    return CompletableFuture.completedFuture(null);
039  }
040
041  @Override
042  public CompletableFuture<String> getClusterId() {
043    return CompletableFuture.completedFuture(null);
044  }
045
046  @Override
047  public CompletableFuture<ServerName> getActiveMaster() {
048    return CompletableFuture.completedFuture(null);
049  }
050
051  @Override
052  public String getConnectionString() {
053    return "nothing";
054  }
055
056  @Override
057  public void close() {
058  }
059}