content: /*
   * Copyright 2017-2025 Hyland Software, Inc. and its affiliates.
   *
   * Licensed 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.activiti.cloud.services.query.app;
  
  import jakarta.persistence.EntityManager;
  import java.util.List;
  import org.activiti.cloud.api.model.shared.events.CloudRuntimeEvent;
  import org.activiti.cloud.services.query.events.handlers.QueryEventHandlerContext;
  import org.activiti.cloud.services.query.events.handlers.QueryEventHandlerContextOptimizer;
  import org.springframework.transaction.annotation.Propagation;
  import org.springframework.transaction.annotation.Transactional;
  import org.springframework.transaction.support.TransactionSynchronization;
  import org.springframework.transaction.support.TransactionSynchronizationManager;
  
  @Transactional(propagation = Propagation.REQUIRES_NEW)
  public class QueryConsumerChannelHandler {
  
      private final QueryEventHandlerContext eventHandlerContext;
      private final QueryEventHandlerContextOptimizer optimizer;
      private final EntityManager entityManager;
  
      public QueryConsumerChannelHandler(
          QueryEventHandlerContext eventHandlerContext,
          QueryEventHandlerContextOptimizer optimizer,
          EntityManager entityManager
      ) {
          this.optimizer = optimizer;
          this.eventHandlerContext = eventHandlerContext;
          this.entityManager = entityManager;
      }
  
      public synchronized void receive(List<CloudRuntimeEvent<?, ?>> events) {
          afterCompletion(entityManager::clear);
          eventHandlerContext.handle(optimizer.optimize(events).toArray(new CloudRuntimeEvent[] {}));
      }
  
      private static void afterCompletion(Runnable action) {
          TransactionSynchronizationManager.registerSynchronization(
              new TransactionSynchronization() {
                  @Override
                  public void afterCompletion(int status) {
                      action.run();
                  }
              }
          );
      }
  }
  