content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.master.file;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  import static org.mockito.Mockito.doAnswer;
  import static org.mockito.Mockito.doThrow;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.verify;
  
  import alluxio.exception.status.UnavailableException;
  import alluxio.master.file.contexts.CallTracker;
  import alluxio.master.file.contexts.InternalOperationContext;
  import alluxio.master.file.contexts.OperationContext;
  import alluxio.master.journal.JournalContext;
  
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * Unit tests for {@link RpcContext}.
   */
  public final class RpcContextTest {
    private BlockDeletionContext mMockBDC = mock(BlockDeletionContext.class);
    private JournalContext mMockJC = mock(JournalContext.class);
    private OperationContext mMockOC = mock(OperationContext.class);
    private RpcContext mRpcContext;
  
    @Rule
    public ExpectedException mException = ExpectedException.none();
  
    @Before
    public void before() {
      mRpcContext = new RpcContext(mMockBDC, mMockJC, mMockOC);
    }
  
    @Test
    public void success() throws Throwable {
      mRpcContext.close();
    }
  
    @Test
    public void order() throws Throwable {
      List<Object> order = new ArrayList<>();
      doAnswer(unused -> order.add(mMockJC)).when(mMockJC).close();
      doAnswer(unused -> order.add(mMockBDC)).when(mMockBDC).close();
      mRpcContext.close();
      assertEquals(Arrays.asList(mMockJC, mMockBDC), order);
    }
  
    @Test
    public void throwTwoRuntimeExceptions() throws Throwable {
      Exception bdcException = new IllegalStateException("block deletion context exception");
      Exception jcException = new IllegalArgumentException("journal context exception");
      doThrow(bdcException).when(mMockBDC).close();
      doThrow(jcException).when(mMockJC).close();
      try {
        mRpcContext.close();
        fail("Expected an exception to be thrown");
      } catch (RuntimeException e) {
        assertEquals(jcException, e);
        // journal context is closed first, so the block deletion context exception should be
        // suppressed.
        assertEquals(bdcException, e.getSuppressed()[0]);
      }
    }
  
    @Test
    public void throwTwoUnavailableExceptions() throws Throwable {
      Exception bdcException = new UnavailableException("block deletion context exception");
      Exception jcException = new UnavailableException("journal context exception");
      doThrow(bdcException).when(mMockBDC).close();
      doThrow(jcException).when(mMockJC).close();
      try {
        mRpcContext.close();
        fail("Expected an exception to be thrown");
      } catch (UnavailableException e) {
        assertEquals(jcException, e);
        // journal context is closed first, so the block deletion context exception should be
        // suppressed.
        assertEquals(bdcException, e.getSuppressed()[0]);
      }
    }
  
    @Test
    public void blockDeletionContextThrows() throws Throwable {
      Exception bdcException = new UnavailableException("block deletion context exception");
      doThrow(bdcException).when(mMockBDC).close();
      checkClose(bdcException);
    }
  
    @Test
    public void journalContextThrows() throws Throwable {
      Exception jcException = new UnavailableException("journal context exception");
      doThrow(jcException).when(mMockJC).close();
      checkClose(jcException);
    }
  
    @Test
    public void testCallTrackers() throws Throwable {
      InternalOperationContext opCtx = new InternalOperationContext();
      // Add a call tracker that's always cancelled.
      opCtx = opCtx.withTracker(new CallTracker() {
        @Override
        public boolean isCancelled() {
          return true;
        }
  
        @Override
        public Type getType() {
          return Type.GRPC_CLIENT_TRACKER;
        }
      });
      // Add a call tracker that's never cancelled.
      opCtx = opCtx.withTracker(new CallTracker() {
        @Override
        public boolean isCancelled() {
          return false;
        }
  
        @Override
        public Type getType() {
          return Type.STATE_LOCK_TRACKER;
        }
      });
      // Create RPC context.
      RpcContext rpcCtx = new RpcContext(mMockBDC, mMockJC, opCtx);
      // Verify the RPC is cancelled due to tracker that's always cancelled.
      assertTrue(rpcCtx.isCancelled());
      // Verify cancellation throws.
      mException.expect(RuntimeException.class);
      rpcCtx.throwIfCancelled();
    }
  
    /*
     * Checks that closing the rpc context throws the expected exception, then verifies that all
     * contexts have been closed.
     */
    private void checkClose(Exception expected) throws Throwable {
      try {
        mRpcContext.close();
        fail("Expected an exception to be thrown");
      } catch (Exception e) {
        assertEquals(expected, e);
        verify(mMockJC).close();
        verify(mMockBDC).close();
      }
    }
  }
  