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.bookkeeper.clients.impl.internal;
  
  import static org.junit.Assert.assertSame;
  import static org.junit.Assert.assertTrue;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.ArgumentMatchers.anyLong;
  import static org.mockito.ArgumentMatchers.anyString;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import io.grpc.Status;
  import io.grpc.StatusRuntimeException;
  import java.util.concurrent.atomic.AtomicInteger;
  import org.apache.bookkeeper.clients.impl.internal.api.RootRangeClient;
  import org.apache.bookkeeper.common.concurrent.FutureUtils;
  import org.apache.bookkeeper.common.util.Backoff;
  import org.apache.bookkeeper.common.util.OrderedScheduler;
  import org.apache.bookkeeper.stream.proto.NamespaceConfiguration;
  import org.apache.bookkeeper.stream.proto.NamespaceProperties;
  import org.apache.bookkeeper.stream.proto.StreamConfiguration;
  import org.apache.bookkeeper.stream.proto.StreamProperties;
  import org.junit.Before;
  import org.junit.Test;
  
  /**
   * Unit test {@link RootRangeClientImplWithRetries}.
   */
  public class RootRangeClientImplWithRetriesTest {
  
      private static final int NUM_RETRIES = 3;
  
      private static final String NS_NAME = "test-namespace";
      private static final NamespaceConfiguration NS_CONF = NamespaceConfiguration.newBuilder().build();
      private static final NamespaceProperties NS_PROPS = NamespaceProperties.newBuilder().build();
      private static final String STREAM_NAME = "test-stream";
      private static final StreamConfiguration STREAM_CONF = StreamConfiguration.newBuilder().build();
      private static final StreamProperties STREAM_PROPS = StreamProperties.newBuilder().build();
  
      private AtomicInteger callCounter;
      private RootRangeClient client;
      private OrderedScheduler scheduler;
      private RootRangeClientImplWithRetries clientWithRetries;
  
      @Before
      public void setup() {
          this.callCounter = new AtomicInteger(NUM_RETRIES);
          this.client = mock(RootRangeClient.class);
          this.scheduler = OrderedScheduler.newSchedulerBuilder()
              .name("test-scheduler")
              .numThreads(1)
              .build();
          this.clientWithRetries = new RootRangeClientImplWithRetries(
              client,
              Backoff.Constant.of(10, NUM_RETRIES),
              scheduler);
      }
  
      @Test
      public void testCreateNamespace() throws Exception {
          when(client.createNamespace(anyString(), any(NamespaceConfiguration.class)))
              .thenAnswer(invocationOnMock -> {
                  if (callCounter.decrementAndGet() > 0) {
                      return FutureUtils.exception(new StatusRuntimeException(Status.NOT_FOUND));
                  } else {
                      return FutureUtils.value(NS_PROPS);
                  }
              });
  
          assertSame(NS_PROPS, FutureUtils.result(clientWithRetries.createNamespace(NS_NAME, NS_CONF)));
      }
  
      @Test
      public void testDeleteNamespace() throws Exception {
          when(client.deleteNamespace(anyString()))
              .thenAnswer(invocationOnMock -> {
                  if (callCounter.decrementAndGet() > 0) {
                      return FutureUtils.exception(new StatusRuntimeException(Status.NOT_FOUND));
                  } else {
                      return FutureUtils.value(true);
                  }
              });
  
          assertTrue(FutureUtils.result(clientWithRetries.deleteNamespace(NS_NAME)));
      }
  
      @Test
      public void testGetNamespace() throws Exception {
          when(client.getNamespace(anyString()))
              .thenAnswer(invocationOnMock -> {
                  if (callCounter.decrementAndGet() > 0) {
                      return FutureUtils.exception(new StatusRuntimeException(Status.NOT_FOUND));
                  } else {
                      return FutureUtils.value(NS_PROPS);
                  }
              });
  
          assertSame(NS_PROPS, FutureUtils.result(clientWithRetries.getNamespace(NS_NAME)));
      }
  
      @Test
      public void testCreateStream() throws Exception {
          when(client.createStream(anyString(), anyString(), any(StreamConfiguration.class)))
              .thenAnswer(invocationOnMock -> {
                  if (callCounter.decrementAndGet() > 0) {
                      return FutureUtils.exception(new StatusRuntimeException(Status.NOT_FOUND));
                  } else {
                      return FutureUtils.value(STREAM_PROPS);
                  }
              });
  
          assertSame(STREAM_PROPS, FutureUtils.result(clientWithRetries.createStream(NS_NAME, STREAM_NAME, STREAM_CONF)));
      }
  
      @Test
      public void testDeleteStream() throws Exception {
          when(client.deleteStream(anyString(), anyString()))
              .thenAnswer(invocationOnMock -> {
                  if (callCounter.decrementAndGet() > 0) {
                      return FutureUtils.exception(new StatusRuntimeException(Status.NOT_FOUND));
                  } else {
                      return FutureUtils.value(true);
                  }
              });
  
          assertTrue(FutureUtils.result(clientWithRetries.deleteStream(NS_NAME, STREAM_NAME)));
      }
  
      @Test
      public void testGetStream() throws Exception {
          when(client.getStream(anyString(), anyString()))
              .thenAnswer(invocationOnMock -> {
                  if (callCounter.decrementAndGet() > 0) {
                      return FutureUtils.exception(new StatusRuntimeException(Status.NOT_FOUND));
                  } else {
                      return FutureUtils.value(STREAM_PROPS);
                  }
              });
  
          assertSame(STREAM_PROPS, FutureUtils.result(clientWithRetries.getStream(NS_NAME, STREAM_NAME)));
      }
  
      @Test
      public void testGetStreamById() throws Exception {
          when(client.getStream(anyLong()))
              .thenAnswer(invocationOnMock -> {
                  if (callCounter.decrementAndGet() > 0) {
                      return FutureUtils.exception(new StatusRuntimeException(Status.NOT_FOUND));
                  } else {
                      return FutureUtils.value(STREAM_PROPS);
                  }
              });
  
          assertSame(STREAM_PROPS, FutureUtils.result(clientWithRetries.getStream(1234L)));
      }
  }
  