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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one 
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and 
16   * limitations under the License.
17   */
18  
19  package org.apache.hadoop.hbase.coprocessor;
20  
21  import static org.junit.Assert.assertEquals;
22  
23  import java.io.IOException;
24  
25  import org.apache.hadoop.conf.Configuration;
26  import org.apache.hadoop.hbase.Coprocessor;
27  import org.apache.hadoop.hbase.CoprocessorEnvironment;
28  import org.apache.hadoop.hbase.HBaseTestingUtility;
29  import org.apache.hadoop.hbase.MediumTests;
30  import org.apache.hadoop.hbase.ServerName;
31  import org.apache.hadoop.hbase.client.HBaseAdmin;
32  import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
33  import org.apache.hadoop.hbase.coprocessor.protobuf.generated.DummyRegionServerEndpointProtos;
34  import org.apache.hadoop.hbase.coprocessor.protobuf.generated.DummyRegionServerEndpointProtos.DummyRequest;
35  import org.apache.hadoop.hbase.coprocessor.protobuf.generated.DummyRegionServerEndpointProtos.DummyResponse;
36  import org.apache.hadoop.hbase.coprocessor.protobuf.generated.DummyRegionServerEndpointProtos.DummyService;
37  import org.apache.hadoop.hbase.ipc.BlockingRpcCallback;
38  import org.apache.hadoop.hbase.ipc.ServerRpcController;
39  import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
40  import org.junit.AfterClass;
41  import org.junit.BeforeClass;
42  import org.junit.Test;
43  import org.junit.experimental.categories.Category;
44  import com.google.protobuf.RpcCallback;
45  import com.google.protobuf.RpcController;
46  import com.google.protobuf.Service;
47  
48  @Category(MediumTests.class)
49  public class TestRegionServerCoprocessorEndpoint {
50    private static HBaseTestingUtility TEST_UTIL = null;
51    private static Configuration CONF = null;
52    private static final String DUMMY_VALUE = "val";
53  
54    @BeforeClass
55    public static void setupBeforeClass() throws Exception {
56      TEST_UTIL = new HBaseTestingUtility();
57      CONF = TEST_UTIL.getConfiguration();
58      CONF.setStrings(CoprocessorHost.REGIONSERVER_COPROCESSOR_CONF_KEY,
59        DummyRegionServerEndpoint.class.getName());
60      TEST_UTIL.startMiniCluster();
61    }
62  
63    @AfterClass
64    public static void tearDownAfterClass() throws Exception {
65      TEST_UTIL.shutdownMiniCluster();
66    }
67  
68    @Test
69    public void testEndpoint() throws Exception {
70      final ServerName serverName = TEST_UTIL.getHBaseCluster().getRegionServer(0).getServerName();
71      final ServerRpcController controller = new ServerRpcController();
72      final BlockingRpcCallback<DummyRegionServerEndpointProtos.DummyResponse> rpcCallback =
73          new BlockingRpcCallback<DummyRegionServerEndpointProtos.DummyResponse>();
74      DummyRegionServerEndpointProtos.DummyService service =
75          ProtobufUtil.newServiceStub(DummyRegionServerEndpointProtos.DummyService.class,
76            new HBaseAdmin(CONF).coprocessorService(serverName));
77      service.dummyCall(controller,
78        DummyRegionServerEndpointProtos.DummyRequest.getDefaultInstance(), rpcCallback);
79      assertEquals(DUMMY_VALUE, rpcCallback.get().getValue());
80      if (controller.failedOnException()) {
81        throw controller.getFailedOn();
82      }
83    }
84  
85    static class DummyRegionServerEndpoint extends DummyService implements Coprocessor, SingletonCoprocessorService {
86  
87      @Override
88      public Service getService() {
89        return this;
90      }
91  
92      @Override
93      public void start(CoprocessorEnvironment env) throws IOException {
94        // TODO Auto-generated method stub
95      }
96  
97      @Override
98      public void stop(CoprocessorEnvironment env) throws IOException {
99        // TODO Auto-generated method stub
100     }
101 
102     @Override
103     public void dummyCall(RpcController controller, DummyRequest request,
104         RpcCallback<DummyResponse> callback) {
105       callback.run(DummyResponse.newBuilder().setValue(DUMMY_VALUE).build());
106     }
107   }
108 }