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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.container.impl.deployment;

import java.util.Set;
import org.camunda.bpm.container.impl.ContainerIntegrationLogger;
import org.camunda.bpm.container.impl.spi.PlatformServiceContainer;
import org.camunda.bpm.container.impl.spi.DeploymentOperation;
import org.camunda.bpm.container.impl.spi.DeploymentOperationStep;
import org.camunda.bpm.container.impl.spi.ServiceTypes;
import org.camunda.bpm.engine.impl.ProcessEngineLogger;

/**
 * Deployment operation step that stops ALL process engines registered inside the container.
 *
 * @author Daniel Meyer
 *
 */
public class StopProcessEnginesStep extends DeploymentOperationStep {

  private final static ContainerIntegrationLogger LOG = ProcessEngineLogger.CONTAINER_INTEGRATION_LOGGER;

  public String getName() {
    return "Stopping process engines";
  }

  public void performOperationStep(DeploymentOperation operationContext) {

    final PlatformServiceContainer serviceContainer = operationContext.getServiceContainer();
    Set serviceNames = serviceContainer.getServiceNames(ServiceTypes.PROCESS_ENGINE);

    for (String serviceName : serviceNames) {
      stopProcessEngine(serviceName, serviceContainer);
    }

  }

  /**
   * Stops a process engine, failures are logged but no exceptions are thrown.
   *
   */
  private void stopProcessEngine(String serviceName, PlatformServiceContainer serviceContainer) {

    try {
      serviceContainer.stopService(serviceName);
    }
    catch(Exception e) {
      LOG.exceptionWhileStopping("Process Engine", serviceName, e);
    }

  }

}