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/* 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.camunda.bpm.engine.rest.impl.application;

import org.camunda.bpm.BpmPlatform;
import org.camunda.bpm.ProcessEngineService;
import org.camunda.bpm.engine.ProcessEngine;
import org.camunda.bpm.engine.ProcessEngines;
import org.camunda.bpm.engine.rest.spi.ProcessEngineProvider;

import java.util.Set;

/**
 * Uses the {@link ProcessEngineService} and exposes the default process engine
 *
 * @author Daniel Meyer
 */
public class ContainerManagedProcessEngineProvider implements ProcessEngineProvider {

  @Override
  public ProcessEngine getDefaultProcessEngine() {
    ProcessEngine defaultProcessEngine = BpmPlatform.getDefaultProcessEngine();
    if(defaultProcessEngine != null) {
      return defaultProcessEngine;
    } else {
      return ProcessEngines.getDefaultProcessEngine(false);
    }
  }

  @Override
  public ProcessEngine getProcessEngine(String name) {
    return ProcessEngines.getProcessEngine(name);
  }

  @Override
  public Set getProcessEngineNames() {
    return ProcessEngines.getProcessEngines().keySet();
  }

}