/**
    * 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.hadoop.hbase.ipc;
  
  import static org.apache.hadoop.hbase.ipc.TestProtobufRpcServiceImpl.SERVICE;
  import static org.junit.Assert.assertEquals;
  
  import java.io.BufferedInputStream;
  import java.io.DataInputStream;
  import java.io.DataOutputStream;
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.net.Socket;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.hbase.HBaseConfiguration;
  import org.apache.hadoop.hbase.HConstants;
  import org.apache.hadoop.hbase.client.MetricsConnection;
  import org.apache.hadoop.hbase.ipc.RpcServer.BlockingServiceAndInterface;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestProtos.EmptyRequestProto;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestProtos.EmptyResponseProto;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestRpcServiceProtos;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestRpcServiceProtos.TestProtobufRpcProto;
  import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
  import org.apache.hadoop.hbase.protobuf.generated.RPCProtos.ConnectionHeader;
  import org.apache.hadoop.hbase.protobuf.generated.RPCProtos.RequestHeader;
  import org.apache.hadoop.hbase.protobuf.generated.RPCProtos.ResponseHeader;
  import org.apache.hadoop.hbase.security.AuthMethod;
  import org.apache.hadoop.hbase.testclassification.MediumTests;
  import org.apache.hadoop.hbase.testclassification.RPCTests;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  import com.google.common.collect.Lists;
  
  @Category({ RPCTests.class, MediumTests.class })
  public class TestRpcServerSlowConnectionSetup {
  
    private RpcServer server;
  
    private Socket socket;
  
    @Before
    public void setUp() throws IOException {
      Configuration conf = HBaseConfiguration.create();
      server = new RpcServer(null, "testRpcServer",
          Lists.newArrayList(new BlockingServiceAndInterface(SERVICE, null)),
          new InetSocketAddress("localhost", 0), conf, new FifoRpcScheduler(conf, 1));
      server.start();
      socket = new Socket("localhost", server.getListenerAddress().getPort());
    }
  
    @After
    public void tearDown() throws IOException {
      if (socket != null) {
        socket.close();
      }
      if (server != null) {
        server.stop();
      }
    }
  
    @Test
    public void test() throws IOException, InterruptedException {
      int rpcHeaderLen = HConstants.RPC_HEADER.length;
      byte[] preamble = new byte[rpcHeaderLen + 2];
      System.arraycopy(HConstants.RPC_HEADER, 0, preamble, 0, rpcHeaderLen);
      preamble[rpcHeaderLen] = HConstants.RPC_CURRENT_VERSION;
      preamble[rpcHeaderLen + 1] = AuthMethod.SIMPLE.code;
      socket.getOutputStream().write(preamble, 0, rpcHeaderLen + 1);
      socket.getOutputStream().flush();
      Thread.sleep(5000);
      socket.getOutputStream().write(preamble, rpcHeaderLen + 1, 1);
      socket.getOutputStream().flush();
  
      ConnectionHeader header = ConnectionHeader.newBuilder()
          .setServiceName(TestRpcServiceProtos.TestProtobufRpcProto.getDescriptor().getFullName())
          .setVersionInfo(ProtobufUtil.getVersionInfo()).build();
      DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
      dos.writeInt(header.getSerializedSize());
      header.writeTo(dos);
      dos.flush();
 
     int callId = 10;
     Call call = new Call(callId, TestProtobufRpcProto.getDescriptor().findMethodByName("ping"),
         EmptyRequestProto.getDefaultInstance(), null, EmptyResponseProto.getDefaultInstance(), 1000,
         HConstants.NORMAL_QOS, null, MetricsConnection.newCallStats());
     RequestHeader requestHeader = IPCUtil.buildRequestHeader(call, null);
     dos.writeInt(IPCUtil.getTotalSizeWhenWrittenDelimited(requestHeader, call.param));
     requestHeader.writeDelimitedTo(dos);
     call.param.writeDelimitedTo(dos);
     dos.flush();
 
     DataInputStream dis = new DataInputStream(new BufferedInputStream(socket.getInputStream()));
     int size = dis.readInt();
     ResponseHeader responseHeader = ResponseHeader.parseDelimitedFrom(dis);
     assertEquals(callId, responseHeader.getCallId());
     EmptyResponseProto.Builder builder = EmptyResponseProto.newBuilder();
     builder.mergeDelimitedFrom(dis);
     assertEquals(size, IPCUtil.getTotalSizeWhenWrittenDelimited(responseHeader, builder.build()));
   }
 }