/**
 * 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.drill.exec.rpc.control;

import org.apache.drill.exec.proto.BitControl.BitControlHandshake;
import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;
import org.apache.drill.exec.rpc.BasicClient;
import org.apache.drill.exec.rpc.ReconnectingConnection;
import org.apache.drill.exec.server.BootStrapContext;
import org.apache.drill.exec.work.batch.ControlMessageHandler;

/**
 * Maintains connection between two particular bits.
 */
public class ControlConnectionManager extends ReconnectingConnection<ControlConnection, BitControlHandshake>{
  static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ControlConnectionManager.class);

  private final DrillbitEndpoint endpoint;
  private final ControlMessageHandler handler;
  private final BootStrapContext context;
  private final DrillbitEndpoint localIdentity;

  public ControlConnectionManager(DrillbitEndpoint remoteEndpoint, DrillbitEndpoint localIdentity, ControlMessageHandler handler, BootStrapContext context) {
    super(BitControlHandshake.newBuilder().setRpcVersion(ControlRpcConfig.RPC_VERSION).setEndpoint(localIdentity).build(), remoteEndpoint.getAddress(), remoteEndpoint.getControlPort());
    assert remoteEndpoint != null : "Endpoint cannot be null.";
    assert remoteEndpoint.getAddress() != null && !remoteEndpoint.getAddress().isEmpty(): "Endpoint address cannot be null.";
    assert remoteEndpoint.getControlPort() > 0 : String.format("Bit Port must be set to a port between 1 and 65k.  Was set to %d.", remoteEndpoint.getControlPort());

    this.endpoint = remoteEndpoint;
    this.localIdentity = localIdentity;
    this.handler = handler;
    this.context = context;
  }

  @Override
  protected BasicClient<?, ControlConnection, BitControlHandshake, ?> getNewClient() {
    return new ControlClient(endpoint, localIdentity, handler, context, new CloseHandlerCreator());
  }


  public DrillbitEndpoint getEndpoint() {
    return endpoint;
  }

}