/**
    * 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.apache.hadoop.hbase.ipc.TestProtobufRpcServiceImpl.newBlockingStub;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.fail;
  
  import com.google.common.collect.Lists;
  import com.google.protobuf.ServiceException;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.hbase.HBaseConfiguration;
  import org.apache.hadoop.hbase.HConstants;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestProtos;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestProtos.EchoRequestProto;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestProtos.EchoResponseProto;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestRpcServiceProtos.TestProtobufRpcProto.BlockingInterface;
  import org.apache.hadoop.hbase.testclassification.MediumTests;
  import org.apache.hadoop.hbase.testclassification.RPCTests;
  import org.apache.log4j.Level;
  import org.apache.log4j.Logger;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  /**
   * Test for testing protocol buffer based RPC mechanism. This test depends on test.proto definition
   * of types in <code>src/test/protobuf/test.proto</code> and protobuf service definition from
   * <code>src/test/protobuf/test_rpc_service.proto</code>
   */
  @Category({ RPCTests.class, MediumTests.class })
  public class TestProtoBufRpc {
    public final static String ADDRESS = "localhost";
    public static int PORT = 0;
    private InetSocketAddress isa;
    private Configuration conf;
    private RpcServerInterface server;
  
    @Before
    public void setUp() throws IOException { // Setup server for both protocols
      this.conf = HBaseConfiguration.create();
      Logger log = Logger.getLogger("org.apache.hadoop.ipc.HBaseServer");
      log.setLevel(Level.DEBUG);
      log = Logger.getLogger("org.apache.hadoop.ipc.HBaseServer.trace");
      log.setLevel(Level.TRACE);
      // Create server side implementation
      // Get RPC server for server side implementation
      this.server = new RpcServer(null, "testrpc",
          Lists.newArrayList(new RpcServer.BlockingServiceAndInterface(SERVICE, null)),
          new InetSocketAddress(ADDRESS, PORT), conf, new FifoRpcScheduler(conf, 10));
      InetSocketAddress address = server.getListenerAddress();
      if (address == null) {
        throw new IOException("Listener channel is closed");
      }
      this.isa = address;
      this.server.start();
    }
  
    @After
    public void tearDown() throws Exception {
      server.stop();
    }
  
    @Test(expected = ServiceException.class
    /* Thrown when we call stub.error */)
    public void testProtoBufRpc() throws Exception {
      RpcClient rpcClient = RpcClientFactory.createClient(conf, HConstants.CLUSTER_ID_DEFAULT);
      try {
        BlockingInterface stub = newBlockingStub(rpcClient, this.isa);
        // Test ping method
        TestProtos.EmptyRequestProto emptyRequest = TestProtos.EmptyRequestProto.newBuilder().build();
        stub.ping(null, emptyRequest);
  
        // Test echo method
        EchoRequestProto echoRequest = EchoRequestProto.newBuilder().setMessage("hello").build();
        EchoResponseProto echoResponse = stub.echo(null, echoRequest);
        assertEquals(echoResponse.getMessage(), "hello");
  
       stub.error(null, emptyRequest);
       fail("Expected exception is not thrown");
     } finally {
       rpcClient.close();
     }
   }
 }