content: /*
   * Copyright 2010-2025 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.engine.impl.event;
  
  import java.util.List;
  import org.activiti.bpmn.model.FlowElement;
  import org.activiti.bpmn.model.Process;
  import org.activiti.bpmn.model.SubProcess;
  import org.activiti.engine.ActivitiException;
  import org.activiti.engine.delegate.event.ActivitiEventType;
  import org.activiti.engine.delegate.event.impl.ActivitiEventBuilder;
  import org.activiti.engine.impl.bpmn.helper.ScopeUtil;
  import org.activiti.engine.impl.context.Context;
  import org.activiti.engine.impl.interceptor.CommandContext;
  import org.activiti.engine.impl.persistence.entity.CompensateEventSubscriptionEntity;
  import org.activiti.engine.impl.persistence.entity.EventSubscriptionEntity;
  import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
  import org.activiti.engine.impl.util.ProcessDefinitionUtil;
  
  /**
  
   */
  public class CompensationEventHandler implements EventHandler {
  
      public String getEventHandlerType() {
          return CompensateEventSubscriptionEntity.EVENT_TYPE;
      }
  
      public void handleEvent(EventSubscriptionEntity eventSubscription, Object payload, CommandContext commandContext) {
          String configuration = eventSubscription.getConfiguration();
          if (configuration == null) {
              throw new ActivitiException(
                  "Compensating execution not set for compensate event subscription with id " + eventSubscription.getId()
              );
          }
  
          ExecutionEntity compensatingExecution = commandContext.getExecutionEntityManager().findById(configuration);
  
          String processDefinitionId = compensatingExecution.getProcessDefinitionId();
          Process process = ProcessDefinitionUtil.getProcess(processDefinitionId);
          if (process == null) {
              throw new ActivitiException(
                  "Cannot start process instance. Process model (id = " + processDefinitionId + ") could not be found"
              );
          }
  
          FlowElement flowElement = process.getFlowElement(eventSubscription.getActivityId(), true);
  
          if (flowElement instanceof SubProcess && !((SubProcess) flowElement).isForCompensation()) {
              // descend into scope:
              compensatingExecution.setScope(true);
              List<CompensateEventSubscriptionEntity> eventsForThisScope = commandContext
                  .getEventSubscriptionEntityManager()
                  .findCompensateEventSubscriptionsByExecutionId(compensatingExecution.getId());
              ScopeUtil.throwCompensationEvent(eventsForThisScope, compensatingExecution, false);
          } else {
              try {
                  if (commandContext.getProcessEngineConfiguration().getEventDispatcher().isEnabled()) {
                      commandContext
                          .getProcessEngineConfiguration()
                          .getEventDispatcher()
                          .dispatchEvent(
                              ActivitiEventBuilder.createActivityEvent(
                                  ActivitiEventType.ACTIVITY_COMPENSATE,
                                  compensatingExecution,
                                  flowElement
                              )
                          );
                  }
                  compensatingExecution.setCurrentFlowElement(flowElement);
                  Context.getAgenda().planContinueProcessInCompensation(compensatingExecution);
              } catch (Exception e) {
                  throw new ActivitiException("Error while handling compensation event " + eventSubscription, e);
              }
          }
      }
  }
  