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.List;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.camel.Exchange;
  import org.apache.camel.Processor;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.component.mock.MockEndpoint;
  import org.apache.camel.examples.SendEmail;
  import org.apache.camel.util.ObjectHelper;
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.Test;
  import org.springframework.context.expression.BeanFactoryResolver;
  import org.springframework.expression.Expression;
  import org.springframework.expression.spel.standard.SpelExpressionParser;
  import org.springframework.expression.spel.support.StandardEvaluationContext;
  import org.springframework.orm.jpa.LocalEntityManagerFactoryBean;
  
  import static org.hamcrest.CoreMatchers.equalTo;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.junit.jupiter.api.Assumptions.assumeTrue;
  
  public class JpaRouteSharedEntityManagerTest extends AbstractJpaTest {
      protected static final String SELECT_ALL_STRING = "select x from " + SendEmail.class.getName() + " x";
      private CountDownLatch latch = new CountDownLatch(1);
  
      @BeforeAll
      public static void hibernateCheck() {
          // Don't run on Hibernate
          assumeTrue(ObjectHelper.loadClass("org.hibernate.Hibernate") == null);
      }
  
      @Test
      public void testRouteJpaShared() throws Exception {
          MockEndpoint mock = getMockEndpoint("mock:result");
          mock.expectedMessageCount(1);
  
          int countStart = getBrokerCount();
          assertThat("brokerCount", countStart, equalTo(1));
  
          template.sendBody("direct:startShared", new SendEmail("one@somewhere.org"));
          // start route
          context.getRouteController().startRoute("jpaShared");
  
          // not the cleanest way to check the number of open connections
          int countEnd = getBrokerCount();
          assertThat("brokerCount", countEnd, equalTo(1));
  
          latch.countDown();
  
          MockEndpoint.assertIsSatisfied(context);
      }
  
      private int getBrokerCount() {
          LocalEntityManagerFactoryBean entityManagerFactory
                  = applicationContext.getBean("&entityManagerFactory", LocalEntityManagerFactoryBean.class);
  
          //uses Spring EL so we don't need to reference the classes
          StandardEvaluationContext context = new StandardEvaluationContext(entityManagerFactory);
          context.setBeanResolver(new BeanFactoryResolver(applicationContext));
          SpelExpressionParser parser = new SpelExpressionParser();
          Expression expression = parser.parseExpression("nativeEntityManagerFactory.brokerFactory.openBrokers");
          List<?> brokers = expression.getValue(context, List.class);
  
          return brokers != null ? brokers.size() : 0;
      }
  
      @Test
      public void testRouteJpaNotShared() throws Exception {
          MockEndpoint mock = getMockEndpoint("mock:result");
          mock.expectedMessageCount(1);
  
          template.sendBody("direct:startNotshared", new SendEmail("one@somewhere.org"));
  
          int countStart = getBrokerCount();
          assertThat("brokerCount", countStart, equalTo(1));
  
          // start route
          context.getRouteController().startRoute("jpaOwn");
  
          // not the cleanest way to check the number of open connections
          int countEnd = getBrokerCount();
          assertThat("brokerCount", countEnd, equalTo(2));
  
          latch.countDown();
  
          MockEndpoint.assertIsSatisfied(context);
      }
  
      @Override
      protected RouteBuilder createRouteBuilder() {
          return new RouteBuilder() {
              public void configure() {
                  from("direct:startNotshared").to("jpa://" + SendEmail.class.getName() + "?");
                  from("direct:startShared")
                          .to("jpa://" + SendEmail.class.getName() + "?sharedEntityManager=true&joinTransaction=false");
                  from("jpa://" + SendEmail.class.getName() + "?sharedEntityManager=true&joinTransaction=false")
                          .routeId("jpaShared").autoStartup(false).process(new LatchProcessor()).to("mock:result");
                  from("jpa://" + SendEmail.class.getName() + "?sharedEntityManager=false").routeId("jpaOwn").autoStartup(false)
                          .process(new LatchProcessor()).to("mock:result");
              }
          };
      }
  
      @Override
      protected String routeXml() {
          return "org/apache/camel/processor/jpa/springJpaRouteTest.xml";
      }
  
      @Override
      protected String selectAllString() {
          return SELECT_ALL_STRING;
      }
  
      private class LatchProcessor implements Processor {
          @Override
          public void process(Exchange exchange) throws Exception {
              latch.await(2, TimeUnit.SECONDS);
          }
      }
  }
  