/*-
 * ============LICENSE_START=======================================================
 * ONAP - SO
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * Copyright (C) 2017 Huawei Technologies Co., Ltd. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.oran.otf.camunda.service;

import org.oran.otf.camunda.configuration.OtfCamundaConfiguration;
import java.util.Optional;
import org.camunda.bpm.engine.ProcessEngineServices;
import org.camunda.bpm.engine.ProcessEngines;
import org.springframework.stereotype.Service;

/**
 * Base class for services that must be process-engine aware. The only process engine currently
 * supported is the "default" process engine.
 */
@Service
public class ProcessEngineAwareService {

  //  private final String processEngineName = OTFProcessEngineConfiguration.processEngineName;
  private final String processEngineName = OtfCamundaConfiguration.processEngineName;
  private volatile Optional<ProcessEngineServices> pes4junit = Optional.empty();

  /**
   * Gets the process engine name.
   *
   * @return the process engine name
   */
  public String getProcessEngineName() {
    return processEngineName;
  }

  /**
   * Gets process engine services.
   *
   * @return process engine services
   */
  public ProcessEngineServices getProcessEngineServices() {
    return pes4junit.orElse(ProcessEngines.getProcessEngine(getProcessEngineName()));
  }

  /**
   * Allows a particular process engine to be specified, overriding the usual process engine lookup
   * by name. Intended primarily for the unit test environment.
   *
   * @param pes process engine services
   */
  public void setProcessEngineServices4junit(ProcessEngineServices pes) {
    pes4junit = Optional.ofNullable(pes);
  }
}