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.camel.component.http;
  
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.Future;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.apache.hc.core5.http.HttpStatus;
  import org.apache.hc.core5.http.impl.bootstrap.HttpServer;
  import org.apache.hc.core5.http.impl.bootstrap.ServerBootstrap;
  import org.apache.hc.core5.http.io.entity.StringEntity;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class HttpConcurrentTest extends BaseHttpTest {
  
      private final AtomicInteger counter = new AtomicInteger();
  
      private HttpServer localServer;
  
      @Override
      public void setupResources() throws Exception {
          localServer = ServerBootstrap.bootstrap()
                  .setCanonicalHostName("localhost").setHttpProcessor(getBasicHttpProcessor())
                  .setConnectionReuseStrategy(getConnectionReuseStrategy()).setResponseFactory(getHttpResponseFactory())
                  .setSslContext(getSSLContext())
                  .register("/", (request, response, context) -> {
                      try {
                          Thread.sleep(1000);
                      } catch (InterruptedException e) {
                          // ignore
                      }
                      response.setCode(HttpStatus.SC_OK);
                      response.setEntity(new StringEntity(Integer.toString(counter.incrementAndGet())));
                  }).create();
          localServer.start();
      }
  
      @Override
      public void cleanupResources() throws Exception {
  
          if (localServer != null) {
              localServer.stop();
          }
      }
  
      @Test
      public void testNoConcurrentProducers() throws Exception {
          doSendMessages(1, 1);
      }
  
      @Test
      public void testConcurrentProducers() throws Exception {
          doSendMessages(10, 5);
      }
  
      private void doSendMessages(int files, int poolSize) throws Exception {
          ExecutorService executor = Executors.newFixedThreadPool(poolSize);
          // we access the responses Map below only inside the main thread,
          // so no need for a thread-safe Map implementation
          Map<Integer, Future<String>> responses = new HashMap<>();
          for (int i = 0; i < files; i++) {
              Future<String> out = executor.submit(() -> template.requestBody(
                      "http://localhost:" + localServer.getLocalPort(), null,
                      String.class));
              responses.put(i, out);
          }
  
          assertEquals(files, responses.size());
  
          // get all responses
          Set<String> unique = new HashSet<>();
          for (Future<String> future : responses.values()) {
              unique.add(future.get());
          }
  
          // should be 'files' unique responses
          assertEquals(files, unique.size(), "Should be " + files + " unique responses");
          executor.shutdownNow();
      }
  
  }
  