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.processor.jpa;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.Callable;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.Future;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.component.mock.MockEndpoint;
  import org.apache.camel.examples.SendEmail;
  import org.junit.jupiter.api.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import static org.apache.camel.test.junit5.TestSupport.body;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  
  public class JpaProducerConcurrentTest extends AbstractJpaTest {
  
      protected static final String SELECT_ALL_STRING = "select x from " + SendEmail.class.getName() + " x";
  
      private static final Logger LOGGER = LoggerFactory.getLogger(JpaProducerConcurrentTest.class);
  
      @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 {
          getMockEndpoint("mock:result").expectedMessageCount(files);
          getMockEndpoint("mock:result").assertNoDuplicates(body());
  
          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<SendEmail>> responses = new HashMap<>();
          for (int i = 0; i < files; i++) {
              final int index = i;
              Future<SendEmail> out = executor.submit(new Callable<SendEmail>() {
                  public SendEmail call() {
                      return template.requestBody("direct:start", new SendEmail("user" + index + "@somewhere.org"),
                              SendEmail.class);
                  }
              });
              responses.put(index, out);
          }
  
          MockEndpoint.assertIsSatisfied(context, 30, TimeUnit.SECONDS);
  
          assertEquals(files, responses.size());
  
          // get them so they are complete
          for (Future<SendEmail> future : responses.values()) {
              SendEmail sendEmail = future.get();
              assertNotNull(sendEmail);
              LOGGER.info("Persisted the SendEmail entity with the id {} and the address {}", sendEmail.getId(),
                      sendEmail.getAddress());
          }
  
          // assert in the database
          assertEntityInDB(files);
          executor.shutdownNow();
      }
  
      @Override
      protected RouteBuilder createRouteBuilder() {
          return new RouteBuilder() {
              public void configure() {
                  from("direct:start").to("jpa://" + SendEmail.class.getName() + "?usePersist=true").to("mock:result");
              }
          };
      }
  
      @Override
      protected String routeXml() {
          return "org/apache/camel/processor/jpa/springJpaRouteTest.xml";
      }
  
      @Override
      protected String selectAllString() {
          return SELECT_ALL_STRING;
      }
  }
  