geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/ConnectionListener.java

/*
 * 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.internal.cache.tier.sockets;

import org.apache.geode.internal.cache.tier.CommunicationMode;

/**
 * A listener which can be registered on {@link AcceptorImpl} in order to receive events about
 * connections created or destroyed for this acceptor.
 *
 * @since GemFire 5.7
 *
 */
public interface ConnectionListener {
  /**
   * Indicates that a new connection has been opened to this acceptor.
   *
   * @param firstConnection true if this is the first connection from this client.
   * @param communicationMode the communication mode of this connection.
   */
  void connectionOpened(boolean firstConnection, CommunicationMode communicationMode);

  /**
   * Indicates that the a connection to this acceptor has been closed.
   *
   * @param lastConnection indicates that this was the last connection from this client.
   * @param communicationMode of this connection.
   */
  void connectionClosed(boolean lastConnection, CommunicationMode communicationMode);

  /**
   * Indicates that a new queue was created on this Acceptor.
   */
  void queueAdded(ClientProxyMembershipID id);

  /**
   * Indicates that a queue was removed from this Acceptor.
   */
  void queueRemoved();
}