Examples of org.apache.hadoop.ipc.RefreshHandler

org.apache.hadoop.ipc.RefreshHandler
Used to registry custom methods to refresh at runtime.

    assertEquals("DFSAdmin should return -1", -1, exitCode);
  }


  @Test
  public void testUnregistrationReturnValue() {
    RefreshHandler mockHandler = Mockito.mock(RefreshHandler.class);
    RefreshRegistry.defaultRegistry().register("test", mockHandler);
    boolean ret = RefreshRegistry.defaultRegistry().unregister("test", mockHandler);
    assertTrue(ret);
  }

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  }


  @Test
  public void testMultipleReturnCodeMerging() throws Exception {
    // Two handlers which return two non-zero values
    RefreshHandler handlerOne = Mockito.mock(RefreshHandler.class);
    Mockito.stub(handlerOne.handleRefresh(Mockito.anyString(), Mockito.any(String[].class)))
      .toReturn(new RefreshResponse(23, "Twenty Three"));


    RefreshHandler handlerTwo = Mockito.mock(RefreshHandler.class);
    Mockito.stub(handlerTwo.handleRefresh(Mockito.anyString(), Mockito.any(String[].class)))
      .toReturn(new RefreshResponse(10, "Ten"));


    // Then registered to the same ID
    RefreshRegistry.defaultRegistry().register("shared", handlerOne);
    RefreshRegistry.defaultRegistry().register("shared", handlerTwo);

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  }


  @Test
  public void testExceptionResultsInNormalError() throws Exception {
    // In this test, we ensure that all handlers are called even if we throw an exception in one
    RefreshHandler exceptionalHandler = Mockito.mock(RefreshHandler.class);
    Mockito.stub(exceptionalHandler.handleRefresh(Mockito.anyString(), Mockito.any(String[].class)))
      .toThrow(new RuntimeException("Exceptional Handler Throws Exception"));


    RefreshHandler otherExceptionalHandler = Mockito.mock(RefreshHandler.class);
    Mockito.stub(otherExceptionalHandler.handleRefresh(Mockito.anyString(), Mockito.any(String[].class)))
      .toThrow(new RuntimeException("More Exceptions"));


    RefreshRegistry.defaultRegistry().register("exceptional", exceptionalHandler);
    RefreshRegistry.defaultRegistry().register("exceptional", otherExceptionalHandler);

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Related Classes of org.apache.hadoop.ipc.RefreshHandler

org.apache.hadoop.TestGenericRefresh

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