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.kafka.clients;
  
  import org.apache.kafka.common.protocol.ApiKeys;
  import org.apache.kafka.common.requests.RequestHeader;
  import org.apache.kafka.common.utils.MockTime;
  import org.apache.kafka.common.utils.Time;
  import org.apache.kafka.test.TestUtils;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  public class InFlightRequestsTest {
  
      private final String dest = "dest";
      private InFlightRequests inFlightRequests;
      private int correlationId;
  
      @BeforeEach
      public void setup() {
          inFlightRequests = new InFlightRequests(12);
          correlationId = 0;
      }
  
      @Test
      public void testCompleteLastSent() {
          int correlationId1 = addRequest(dest);
          int correlationId2 = addRequest(dest);
          assertEquals(2, inFlightRequests.count());
  
          assertEquals(correlationId2, inFlightRequests.completeLastSent(dest).header.correlationId());
          assertEquals(1, inFlightRequests.count());
  
          assertEquals(correlationId1, inFlightRequests.completeLastSent(dest).header.correlationId());
          assertEquals(0, inFlightRequests.count());
      }
  
      @Test
      public void testClearAll() {
          int correlationId1 = addRequest(dest);
          int correlationId2 = addRequest(dest);
  
          List<NetworkClient.InFlightRequest> clearedRequests = TestUtils.toList(this.inFlightRequests.clearAll(dest));
          assertEquals(0, inFlightRequests.count());
          assertEquals(2, clearedRequests.size());
          assertEquals(correlationId1, clearedRequests.get(0).header.correlationId());
          assertEquals(correlationId2, clearedRequests.get(1).header.correlationId());
      }
  
      @Test
      public void testTimedOutNodes() {
          Time time = new MockTime();
  
          addRequest("A", time.milliseconds(), 50);
          addRequest("B", time.milliseconds(), 200);
          addRequest("B", time.milliseconds(), 100);
  
          time.sleep(50);
          assertEquals(Collections.emptyList(), inFlightRequests.nodesWithTimedOutRequests(time.milliseconds()));
  
          time.sleep(25);
          assertEquals(Collections.singletonList("A"), inFlightRequests.nodesWithTimedOutRequests(time.milliseconds()));
  
          time.sleep(50);
          assertEquals(Arrays.asList("A", "B"), inFlightRequests.nodesWithTimedOutRequests(time.milliseconds()));
      }
  
      @Test
      public void testCompleteNext() {
          int correlationId1 = addRequest(dest);
          int correlationId2 = addRequest(dest);
          assertEquals(2, inFlightRequests.count());
  
          assertEquals(correlationId1, inFlightRequests.completeNext(dest).header.correlationId());
          assertEquals(1, inFlightRequests.count());
  
          assertEquals(correlationId2, inFlightRequests.completeNext(dest).header.correlationId());
          assertEquals(0, inFlightRequests.count());
      }
  
      @Test
      public void testCompleteNextThrowsIfNoInFlights() {
          assertThrows(IllegalStateException.class, () -> inFlightRequests.completeNext(dest));
      }
  
      @Test
      public void testCompleteLastSentThrowsIfNoInFlights() {
          assertThrows(IllegalStateException.class, () -> inFlightRequests.completeLastSent(dest));
      }
  
      private int addRequest(String destination) {
          return addRequest(destination, 0, 10000);
      }
  
      private int addRequest(String destination, long sendTimeMs, int requestTimeoutMs) {
          int correlationId = this.correlationId;
          this.correlationId += 1;
  
          RequestHeader requestHeader = new RequestHeader(ApiKeys.METADATA, (short) 0, "clientId", correlationId);
          NetworkClient.InFlightRequest ifr = new NetworkClient.InFlightRequest(requestHeader, requestTimeoutMs, 0,
                  destination, null, false, false, null, null, sendTimeMs);
          inFlightRequests.add(ifr);
          return correlationId;
      }
  
  }
  