content: /*
   *
   * 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.bookkeeper.test;
  
  import static java.nio.charset.StandardCharsets.UTF_8;
  import static org.apache.bookkeeper.util.BookKeeperConstants.AVAILABLE_NODE;
  import static org.apache.bookkeeper.util.BookKeeperConstants.INSTANCEID;
  import static org.apache.bookkeeper.util.BookKeeperConstants.READONLY;
  
  import java.io.IOException;
  import java.util.UUID;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  import org.apache.bookkeeper.zookeeper.ZooKeeperWatcherBase;
  import org.apache.zookeeper.CreateMode;
  import org.apache.zookeeper.KeeperException;
  import org.apache.zookeeper.Transaction;
  import org.apache.zookeeper.ZooDefs.Ids;
  import org.apache.zookeeper.ZooKeeper;
  
  /**
   * Interface for ZooKeeperCluster.
   */
  public interface ZooKeeperCluster {
      ZooKeeper getZooKeeperClient();
  
      String getZooKeeperConnectString();
  
      String getMetadataServiceUri();
  
      String getMetadataServiceUri(String zkLedgersRootPath);
  
      String getMetadataServiceUri(String zkLedgersRootPath, String type);
  
      void startCluster() throws Exception;
  
      void stopCluster() throws Exception;
  
      void restartCluster() throws Exception;
  
      void killCluster() throws Exception;
  
      void sleepCluster(int time, TimeUnit timeUnit, CountDownLatch l)
              throws InterruptedException, IOException;
  
      default void expireSession(ZooKeeper zk) throws Exception {
          long id = zk.getSessionId();
          byte[] password = zk.getSessionPasswd();
          ZooKeeperWatcherBase w = new ZooKeeperWatcherBase(10000, false);
          ZooKeeper zk2 = new ZooKeeper(getZooKeeperConnectString(), zk.getSessionTimeout(), w, id, password);
          w.waitForConnection();
          zk2.close();
      }
  
      default void createBKEnsemble(String ledgersPath) throws KeeperException, InterruptedException {
          Transaction txn = getZooKeeperClient().transaction();
          txn.create(ledgersPath, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
          txn.create(ledgersPath + "/" + AVAILABLE_NODE, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
          txn.create(ledgersPath + "/" + AVAILABLE_NODE + "/" + READONLY, new byte[0], Ids.OPEN_ACL_UNSAFE,
                  CreateMode.PERSISTENT);
          String instanceId = UUID.randomUUID().toString();
          txn.create(ledgersPath + "/" + INSTANCEID, instanceId.getBytes(UTF_8),
                  Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
          txn.commit();
      }
  }
  