content: /*
   * 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.beam.runners.fnexecution.control;
  
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.doThrow;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import org.apache.beam.runners.fnexecution.control.ReferenceCountingExecutableStageContextFactory.Creator;
  import org.apache.beam.runners.fnexecution.provisioning.JobInfo;
  import org.apache.beam.sdk.testing.ExpectedLogs;
  import org.junit.Assert;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.Timeout;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link ReferenceCountingExecutableStageContextFactory}. */
  @RunWith(JUnit4.class)
  public class ReferenceCountingExecutableStageContextFactoryTest {
    @Rule public transient Timeout globalTimeout = Timeout.seconds(600);
  
    @Rule
    public ExpectedLogs expectedLogs =
        ExpectedLogs.none(ReferenceCountingExecutableStageContextFactory.class);
  
    @Test
    public void testCreateReuseReleaseCreate() throws Exception {
  
      Creator creator = mock(Creator.class);
      ExecutableStageContext c1 = mock(ExecutableStageContext.class);
      ExecutableStageContext c2 = mock(ExecutableStageContext.class);
      ExecutableStageContext c3 = mock(ExecutableStageContext.class);
      ExecutableStageContext c4 = mock(ExecutableStageContext.class);
      when(creator.apply(any(JobInfo.class)))
          .thenReturn(c1)
          .thenReturn(c2)
          .thenReturn(c3)
          .thenReturn(c4);
      ReferenceCountingExecutableStageContextFactory factory =
          ReferenceCountingExecutableStageContextFactory.create(creator, (x) -> true);
      JobInfo jobA = mock(JobInfo.class);
      when(jobA.jobId()).thenReturn("jobA");
      JobInfo jobB = mock(JobInfo.class);
      when(jobB.jobId()).thenReturn("jobB");
      ExecutableStageContext ac1A = factory.get(jobA); // 1 open jobA
      ExecutableStageContext ac2B = factory.get(jobB); // 1 open jobB
      Assert.assertSame(
          "Context should be cached and reused.", ac1A, factory.get(jobA)); // 2 open jobA
      Assert.assertSame(
          "Context should be cached and reused.", ac2B, factory.get(jobB)); // 2 open jobB
      factory.release(ac1A); // 1 open jobA
      Assert.assertSame(
          "Context should be cached and reused.", ac1A, factory.get(jobA)); // 2 open jobA
      factory.release(ac1A); // 1 open jobA
      factory.release(ac1A); // 0 open jobA
      ExecutableStageContext ac3A = factory.get(jobA); // 1 open jobA
      Assert.assertNotSame("We should get a new instance.", ac1A, ac3A);
      Assert.assertSame(
          "Context should be cached and reused.", ac3A, factory.get(jobA)); // 2 open jobA
      factory.release(ac3A); // 1 open jobA
      factory.release(ac3A); // 0 open jobA
      Assert.assertSame(
          "Context should be cached and reused.", ac2B, factory.get(jobB)); // 3 open jobB
      factory.release(ac2B); // 2 open jobB
      factory.release(ac2B); // 1 open jobB
      factory.release(ac2B); // 0 open jobB
      ExecutableStageContext ac4B = factory.get(jobB); // 1 open jobB
      Assert.assertNotSame("We should get a new instance.", ac2B, ac4B);
      factory.release(ac4B); // 0 open jobB
    }
  
    @Test
    public void testCatchThrowablesAndLogThem() throws Exception {
      Creator creator = mock(Creator.class);
      ExecutableStageContext c1 = mock(ExecutableStageContext.class);
      when(creator.apply(any(JobInfo.class))).thenReturn(c1);
      // throw an Throwable and ensure that it is caught and logged.
      doThrow(new NoClassDefFoundError()).when(c1).close();
      ReferenceCountingExecutableStageContextFactory factory =
          ReferenceCountingExecutableStageContextFactory.create(creator, (x) -> true);
      JobInfo jobA = mock(JobInfo.class);
      when(jobA.jobId()).thenReturn("jobA");
      ExecutableStageContext ac1A = factory.get(jobA);
      factory.release(ac1A);
      expectedLogs.verifyError("Unable to close ExecutableStageContext");
    }
  }
  