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 org.activiti.engine.delegate.event.impl.ActivitiEventBuilder;
  import org.activiti.engine.impl.interceptor.CommandContext;
  import org.activiti.engine.impl.persistence.entity.EventSubscriptionEntity;
  import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
  
  /**
  
   */
  public class MessageEventHandler extends AbstractEventHandler {
  
      public static final String EVENT_HANDLER_TYPE = "message";
  
      private final EventSubscriptionPayloadMappingProvider messageEventVariableMappingProvider;
  
      public MessageEventHandler(EventSubscriptionPayloadMappingProvider messageEventVariableMappingProvider) {
          this.messageEventVariableMappingProvider = messageEventVariableMappingProvider;
      }
  
      public String getEventHandlerType() {
          return EVENT_HANDLER_TYPE;
      }
  
      @Override
      public void handleEvent(EventSubscriptionEntity eventSubscription, Object payload, CommandContext commandContext) {
          // As stated in the ActivitiEventType java-doc, the message-event is
          // thrown before the actual message has been sent
          if (commandContext.getProcessEngineConfiguration().getEventDispatcher().isEnabled()) {
              ExecutionEntity execution = eventSubscription.getExecution();
              String messageName = eventSubscription.getEventName();
              String correlationKey = eventSubscription.getConfiguration();
  
              commandContext
                  .getProcessEngineConfiguration()
                  .getEventDispatcher()
                  .dispatchEvent(
                      ActivitiEventBuilder.createMessageReceivedEvent(execution, messageName, correlationKey, payload)
                  );
          }
  
          Object variables = messageEventVariableMappingProvider.apply(payload, eventSubscription);
  
          super.handleEvent(eventSubscription, variables, commandContext);
      }
  }
  