org.activiti.engine.impl.event.SignalEventHandler Maven / Gradle / Ivy
/* 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.bpmn.model.FlowElement;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.ActivitiObjectNotFoundException;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.EventSubscriptionEntity;
import org.activiti.engine.impl.util.ProcessDefinitionUtil;
import org.activiti.engine.impl.util.ProcessInstanceHelper;
import org.activiti.engine.repository.ProcessDefinition;
import java.util.Map;
/**
*/
public class SignalEventHandler extends AbstractEventHandler {
public static final String EVENT_HANDLER_TYPE = "signal";
public String getEventHandlerType() {
return EVENT_HANDLER_TYPE;
}
@SuppressWarnings("unchecked")
@Override
public void handleEvent(EventSubscriptionEntity eventSubscription, Object payload, CommandContext commandContext) {
if (eventSubscription.getExecutionId() != null) {
super.handleEvent(eventSubscription, payload, commandContext);
} else if (eventSubscription.getProcessDefinitionId() != null) {
// Find initial flow element matching the signal start event
String processDefinitionId = eventSubscription.getProcessDefinitionId();
ProcessDefinition processDefinition = ProcessDefinitionUtil.getProcessDefinition(processDefinitionId);
if (processDefinition == null) {
throw new ActivitiObjectNotFoundException("No process definition found for id '" + processDefinitionId + "'", ProcessDefinition.class);
}
if (processDefinition.isSuspended()) {
throw new ActivitiException("Could not handle signal: process definition with id: " + processDefinitionId + " is suspended");
}
org.activiti.bpmn.model.Process process = ProcessDefinitionUtil.getProcess(processDefinitionId);
FlowElement flowElement = process.getFlowElement(eventSubscription.getActivityId(), true);
if (flowElement == null) {
throw new ActivitiException("Could not find matching FlowElement for activityId " + eventSubscription.getActivityId());
}
// Start process instance via that flow element
Map variables = null;
if (payload instanceof Map) {
variables = (Map) payload;
}
ProcessInstanceHelper processInstanceHelper = commandContext.getProcessEngineConfiguration().getProcessInstanceHelper();
processInstanceHelper.createAndStartProcessInstanceWithInitialFlowElement(processDefinition, null, null, flowElement, process, variables, null, true);
} else {
throw new ActivitiException("Invalid signal handling: no execution nor process definition set");
}
}
}