TestBlockingRpc.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.tajo.rpc;

import org.apache.tajo.conf.TajoConf;
import org.apache.tajo.rpc.test.DummyProtocol;
import org.apache.tajo.rpc.test.DummyProtocol.DummyProtocolService.BlockingInterface;
import org.apache.tajo.rpc.test.TestProtos.EchoMessage;
import org.apache.tajo.rpc.test.TestProtos.SumRequest;
import org.apache.tajo.rpc.test.TestProtos.SumResponse;
import org.apache.tajo.rpc.test.impl.DummyProtocolBlockingImpl;
import org.apache.tajo.util.NetUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.net.InetSocketAddress;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import static org.junit.Assert.*;

public class TestBlockingRpc {
  public static String MESSAGE = "TestBlockingRpc";

  private BlockingRpcServer server;
  private BlockingRpcClient client;
  private BlockingInterface stub;
  private DummyProtocolBlockingImpl service;

  @Before
  public void setUp() throws Exception {
    service = new DummyProtocolBlockingImpl();
    server = new BlockingRpcServer(DummyProtocol.class, service,
        new InetSocketAddress("127.0.0.1", 0), 2);
    server.start();
    client = new BlockingRpcClient(DummyProtocol.class,
        NetUtils.getConnectAddress(server.getListenAddress()));
    stub = client.getStub();
  }

  @After
  public void tearDown() throws Exception {
    if(client != null) {
      client.close();
    }
    if(server != null) {
      server.shutdown();
    }
  }

  @Test
  public void testRpc() throws Exception {
    SumRequest request = SumRequest.newBuilder()
        .setX1(1)
        .setX2(2)
        .setX3(3.15d)
        .setX4(2.0f).build();
    SumResponse response1 = stub.sum(null, request);
    assertTrue(8.15d == response1.getResult());

    EchoMessage message = EchoMessage.newBuilder()
        .setMessage(MESSAGE).build();
    EchoMessage response2 = stub.echo(null, message);
    assertEquals(MESSAGE, response2.getMessage());
  }

  @Test
  public void testRpcWithServiceCallable() throws Exception {
    final SumRequest request = SumRequest.newBuilder()
        .setX1(1)
        .setX2(2)
        .setX3(3.15d)
        .setX4(2.0f).build();

    SumResponse response =
    new ServerCallable<SumResponse>(RpcConnectionPool.newPool(new TajoConf(), getClass().getSimpleName(), 2),
        server.getListenAddress(), DummyProtocol.class, false) {
      @Override
      public SumResponse call(NettyClientBase client) throws Exception {
        BlockingInterface stub2 = client.getStub();
        SumResponse response1 = stub2.sum(null, request);
        return response1;
      }
    }.withRetries();

    assertTrue(8.15d == response.getResult());

    response =
        new ServerCallable<SumResponse>(RpcConnectionPool.newPool(new TajoConf(), getClass().getSimpleName(), 2),
            server.getListenAddress(), DummyProtocol.class, false) {
          @Override
          public SumResponse call(NettyClientBase client) throws Exception {
            BlockingInterface stub2 = client.getStub();
            SumResponse response1 = stub2.sum(null, request);
            return response1;
          }
        }.withoutRetries();

    assertTrue(8.15d == response.getResult());
  }

  @Test
  public void testGetNull() throws Exception {
    assertNull(stub.getNull(null, null));
    assertTrue(service.getNullCalled);
  }

  @Test
  public void testShutdown() throws Exception {
    final StringBuilder error = new StringBuilder();
    Thread callThread = new Thread() {
      public void run() {
        try {
          EchoMessage message = EchoMessage.newBuilder()
              .setMessage(MESSAGE)
              .build();
          stub.deley(null, message);
        } catch (Exception e) {
          e.printStackTrace();
          error.append(e.getMessage());
        }
        synchronized(error) {
          error.notifyAll();
        }
      }
    };

    callThread.start();

    final CountDownLatch latch = new CountDownLatch(1);
    Thread shutdownThread = new Thread() {
      public void run() {
        try {
          Thread.sleep(1000);
        } catch (InterruptedException e) {
        }
        try {
          server.shutdown();
          server = null;
          latch.countDown();
        } catch (Throwable e) {
          e.printStackTrace();
        }
      }
    };
    shutdownThread.start();

    latch.await(5 * 1000, TimeUnit.MILLISECONDS);

    assertTrue(latch.getCount() == 0);

    synchronized(error) {
      error.wait(5 * 1000);
    }

    if(!error.toString().isEmpty()) {
      fail(error.toString());
    }
  }

  @Test
  public void testUnresolvedAddress() throws Exception {
    String hostAndPort = NetUtils.normalizeInetSocketAddress(server.getListenAddress());
    BlockingRpcClient client = new BlockingRpcClient(DummyProtocol.class, NetUtils.createUnresolved(hostAndPort));
    BlockingInterface stub = client.getStub();

    EchoMessage message = EchoMessage.newBuilder()
        .setMessage(MESSAGE).build();
    EchoMessage response2 = stub.echo(null, message);
    assertEquals(MESSAGE, response2.getMessage());
    client.close();
  }
}