/**
    * 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.mockito.Mockito.mock;
  
  import com.google.common.collect.Lists;
  import com.google.protobuf.BlockingService;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.hbase.Abortable;
  import org.apache.hadoop.hbase.HBaseConfiguration;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestProtos.EchoRequestProto;
  import org.apache.hadoop.hbase.ipc.protobuf.generated.TestRpcServiceProtos.TestProtobufRpcProto.BlockingInterface;
  import org.apache.hadoop.hbase.testclassification.RPCTests;
  import org.apache.hadoop.hbase.testclassification.SmallTests;
  import org.junit.Ignore;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  @Category({ RPCTests.class, SmallTests.class })
  public class TestRpcHandlerException {
  
    private final static Configuration CONF = HBaseConfiguration.create();
  
    /**
     * Instance of server. We actually don't do anything speical in here so could just use
     * HBaseRpcServer directly.
     */
    private static class TestRpcServer extends RpcServer {
  
      TestRpcServer(RpcScheduler scheduler) throws IOException {
        super(null, "testRpcServer",
            Lists.newArrayList(new BlockingServiceAndInterface((BlockingService) SERVICE, null)),
            new InetSocketAddress("localhost", 0), CONF, scheduler);
      }
    }
  
    /**
     * Tests that the rpc scheduler is called when requests arrive. When Rpc handler thread dies, the
     * client will hang and the test will fail. The test is meant to be a unit test to test the
     * behavior.
     */
    private class AbortServer implements Abortable {
      private boolean aborted = false;
  
      @Override
      public void abort(String why, Throwable e) {
        aborted = true;
      }
  
      @Override
      public boolean isAborted() {
        return aborted;
      }
    }
  
    /*
     * This is a unit test to make sure to abort region server when the number of Rpc handler thread
     * caught errors exceeds the threshold. Client will hang when RS aborts.
     */
    @Ignore
    @Test
    public void testRpcScheduler() throws IOException, InterruptedException {
      PriorityFunction qosFunction = mock(PriorityFunction.class);
      Abortable abortable = new AbortServer();
      RpcScheduler scheduler = new SimpleRpcScheduler(CONF, 2, 0, 0, qosFunction, abortable, 0);
      RpcServer rpcServer = new TestRpcServer(scheduler);
      try (BlockingRpcClient client = new BlockingRpcClient(CONF)) {
        rpcServer.start();
        BlockingInterface stub = newBlockingStub(client, rpcServer.getListenerAddress());
        stub.echo(null, EchoRequestProto.newBuilder().setMessage("hello").build());
      } catch (Throwable e) {
        assert (abortable.isAborted() == true);
      } finally {
        rpcServer.stop();
      }
    }
  
 }