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/*
 * Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
 * under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership. Camunda licenses this file to you under the Apache License,
 * Version 2.0; 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.camunda.bpm.engine.spring;

import org.camunda.bpm.engine.impl.cfg.ProcessEngineConfigurationImpl;
import org.camunda.bpm.engine.impl.interceptor.Command;
import org.camunda.bpm.engine.impl.interceptor.CommandInterceptor;
import org.camunda.bpm.engine.impl.util.ExceptionUtil;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionSystemException;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;

/**
 * @author Dave Syer
 * @author Tom Baeyens
 */
public class SpringTransactionInterceptor extends CommandInterceptor {

  protected PlatformTransactionManager transactionManager;
  protected int transactionPropagation;
  protected ProcessEngineConfigurationImpl processEngineConfiguration;

  /**
   * @deprecated use the {@link #SpringTransactionInterceptor(PlatformTransactionManager, int, ProcessEngineConfigurationImpl)}
   *    constructor to ensure that concurrency conflicts that occur on
   *    transaction commit are detected and handled in all cases
   */
  @Deprecated
  public SpringTransactionInterceptor(PlatformTransactionManager transactionManager, int transactionPropagation) {
    this(transactionManager, transactionPropagation, null);
  }

  public SpringTransactionInterceptor(PlatformTransactionManager transactionManager,
                                      int transactionPropagation,
                                      ProcessEngineConfigurationImpl processEngineConfiguration) {
    this.transactionManager = transactionManager;
    this.transactionPropagation = transactionPropagation;
    this.processEngineConfiguration = processEngineConfiguration;
  }

  @SuppressWarnings("unchecked")
  public  T execute(final Command command) {
    TransactionTemplate transactionTemplate = new TransactionTemplate(transactionManager);
    transactionTemplate.setPropagationBehavior(transactionPropagation);
    try {
      // don't use lambdas here => CAM-12810
      return (T) transactionTemplate.execute((TransactionCallback) status -> next.execute(command));
    } catch (TransactionSystemException ex) {
      throw ExceptionUtil.wrapPersistenceException(ex);
    }
  }
}