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.jpa;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.ExecutorService;
  
  import jakarta.persistence.EntityManagerFactory;
  
  import org.apache.camel.Endpoint;
  import org.apache.camel.spi.Metadata;
  import org.apache.camel.spi.annotations.Component;
  import org.apache.camel.support.HealthCheckComponent;
  import org.apache.camel.util.ObjectHelper;
  import org.apache.camel.util.PropertiesHelper;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * A JPA Component
   */
  @Component("jpa")
  public class JpaComponent extends HealthCheckComponent {
  
      private static final Logger LOG = LoggerFactory.getLogger(JpaComponent.class);
  
      private ExecutorService pollingConsumerExecutorService;
  
      @Metadata(autowired = true)
      private EntityManagerFactory entityManagerFactory;
      @Metadata
      private TransactionStrategy transactionStrategy;
      @Metadata(defaultValue = "true")
      private boolean joinTransaction = true;
      @Metadata
      private boolean sharedEntityManager;
      @Metadata
      private Map<String, Class<?>> aliases = new HashMap<>();
  
      public JpaComponent() {
          // default constructor
      }
  
      // Properties
      //-------------------------------------------------------------------------
      public EntityManagerFactory getEntityManagerFactory() {
          return entityManagerFactory;
      }
  
      /**
       * To use the {@link EntityManagerFactory}. This is strongly recommended to configure.
       */
      public void setEntityManagerFactory(EntityManagerFactory entityManagerFactory) {
          this.entityManagerFactory = entityManagerFactory;
      }
  
      public TransactionStrategy getTransactionStrategy() {
          return transactionStrategy;
      }
  
      /**
       * To use the {@link TransactionStrategy} for running the operations in a transaction.
       */
      public void setTransactionStrategy(TransactionStrategy transactionStrategy) {
          this.transactionStrategy = transactionStrategy;
      }
  
      public boolean isJoinTransaction() {
          return joinTransaction;
      }
  
      /**
       * The camel-jpa component will join transaction by default. You can use this option to turn this off, for example
       * if you use LOCAL_RESOURCE and join transaction doesn't work with your JPA provider. This option can also be set
       * globally on the JpaComponent, instead of having to set it on all endpoints.
       */
      public void setJoinTransaction(boolean joinTransaction) {
          this.joinTransaction = joinTransaction;
      }
  
      public boolean isSharedEntityManager() {
          return sharedEntityManager;
      }
  
      /**
       * Whether to use Spring's SharedEntityManager for the consumer/producer. Note in most cases joinTransaction should
       * be set to false as this is not an EXTENDED EntityManager.
       */
      public void setSharedEntityManager(boolean sharedEntityManager) {
          this.sharedEntityManager = sharedEntityManager;
      }
  
      public void addAlias(String alias, Class<?> clazz) {
          this.aliases.put(alias, clazz);
      }
  
      /**
       * Maps an alias to a JPA entity class. The alias can then be used in the endpoint URI (instead of the fully
       * qualified class name).
       */
      public void setAliases(Map<String, Class<?>> aliases) {
          this.aliases = aliases;
      }
  
      public Map<String, Class<?>> getAliases() {
          return aliases;
      }
  
      ExecutorService getOrCreatePollingConsumerExecutorService() {
          lock.lock();
          try {
              if (pollingConsumerExecutorService == null) {
                  LOG.debug("Creating thread pool for JpaPollingConsumer to support polling using timeout");
                  pollingConsumerExecutorService
                          = getCamelContext().getExecutorServiceManager().newDefaultThreadPool(this, "JpaPollingConsumer");
              }
              return pollingConsumerExecutorService;
          } finally {
              lock.unlock();
          }
      }
  
      // Implementation methods
      //-------------------------------------------------------------------------
  
      @Override
      protected Endpoint createEndpoint(String uri, String path, Map<String, Object> options) throws Exception {
          JpaEndpoint endpoint = new JpaEndpoint(uri, this);
          endpoint.setJoinTransaction(isJoinTransaction());
          endpoint.setSharedEntityManager(isSharedEntityManager());
  
          Map<String, Object> params = PropertiesHelper.extractProperties(options, "parameters.", true);
          if (!params.isEmpty()) {
              endpoint.setParameters(params);
          }
  
          // lets interpret the next string as an alias or class
          if (ObjectHelper.isNotEmpty(path)) {
              Class<?> type = aliases.get(path);
              if (type == null) {
                  // provide the class loader of this component to work in OSGi environments as camel-jpa must be able
                  // to resolve the entity classes
                  type = getCamelContext().getClassResolver().resolveClass(path, JpaComponent.class.getClassLoader());
              }
  
              if (type != null) {
                  endpoint.setEntityType(type);
              }
          }
          setProperties(endpoint, options);
          return endpoint;
      }
  
      @Override
      protected void doInit() throws Exception {
          super.doInit();
  
          // warn about missing configuration
          if (entityManagerFactory == null) {
              LOG.warn(
                      "No EntityManagerFactory has been configured on this JpaComponent. Each JpaEndpoint will auto create their own EntityManagerFactory.");
          }
  
          if (transactionStrategy != null) {
              LOG.info("Using TransactionStrategy configured: {}", transactionStrategy);
          } else {
              createTransactionStrategy();
          }
      }
  
      private void createTransactionStrategy() {
          if (transactionStrategy == null && getEntityManagerFactory() != null) {
              transactionStrategy = new DefaultTransactionStrategy(getCamelContext(), getEntityManagerFactory());
          }
      }
  
      @Override
      protected void doStop() throws Exception {
          super.doStop();
  
          if (pollingConsumerExecutorService != null) {
              getCamelContext().getExecutorServiceManager().shutdown(pollingConsumerExecutorService);
              pollingConsumerExecutorService = null;
          }
      }
  }
  