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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing

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/*
 * 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.geode.distributed.internal.membership.gms.interfaces;

import org.apache.geode.distributed.DistributedMember;
import org.apache.geode.distributed.internal.membership.InternalDistributedMember;
import org.apache.geode.distributed.internal.membership.NetMember;
import org.apache.geode.distributed.internal.membership.NetView;

public interface JoinLeave extends Service {

  /**
   * joins the distributed system and returns true if successful, false if not. Throws
   * SystemConnectException and GemFireConfigException
   */
  boolean join();

  /**
   * leaves the distributed system. Should be invoked before stop()
   */
  void leave();

  /**
   * force another member out of the system
   */
  void remove(InternalDistributedMember m, String reason);

  /**
   * Invoked by the Manager, this notifies the HealthMonitor that a ShutdownMessage has been
   * received from the given member
   */
  public void memberShutdown(DistributedMember mbr, String reason);

  /**
   * returns the local address
   */
  InternalDistributedMember getMemberID();

  /**
   * Get "InternalDistributedMember" from current view or prepared view.
   */
  InternalDistributedMember getMemberID(NetMember m);

  /**
   * returns the current membership view
   */
  NetView getView();


  /**
   * returns the last known view prior to close - for reconnecting
   */
  NetView getPreviousView();

  /**
   * check to see if a member is already in the process of leaving or being removed (in the next
   * view)
   */
  boolean isMemberLeaving(DistributedMember mbr);

  /**
   * test hook
   */
  void disableDisconnectOnQuorumLossForTesting();
}