/*
 * 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.cache.client.internal;

import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.SocketException;
import java.nio.ByteBuffer;

import org.apache.geode.distributed.internal.ServerLocation;
import org.apache.geode.internal.cache.tier.sockets.ServerQueueStatus;

/**
 * Represents a connection from a client to a server. Instances are created, kept, and used by
 * {@link PoolImpl}.
 * 
 * @since GemFire 5.7
 */
public interface Connection {
  public static final long DEFAULT_CONNECTION_ID = 26739;

  public Socket getSocket();

  public ByteBuffer getCommBuffer() throws SocketException;

  public ConnectionStats getStats();

  /**
   * Forcefully close the resources used by this connection. This should be called if the connection
   * or the server dies.
   */
  public void destroy();

  /**
   * Return true if this connection has been destroyed
   */
  public boolean isDestroyed();

  /**
   * Gracefully close the connection by notifying the server. It is not necessary to call destroy
   * after closing the connection.
   * 
   * @param keepAlive What do do this server to client connection proxy on this server.
   * @throws Exception if there was an error notifying the server. The connection will still be
   *         destroyed.
   */
  public void close(boolean keepAlive) throws Exception;

  public ServerLocation getServer();

  public Endpoint getEndpoint();

  public ServerQueueStatus getQueueStatus();

  public Object execute(Op op) throws Exception;

  public void emergencyClose();

  public short getWanSiteVersion();

  public void setWanSiteVersion(short wanSiteVersion);

  public int getDistributedSystemId();

  public OutputStream getOutputStream();

  public InputStream getInputStream();

  public void setConnectionID(long id);

  public long getConnectionID();
}
