import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
-
import org.camunda.bpm.engine.delegate.BpmnError;
import org.camunda.bpm.engine.delegate.DelegateExecution;
import org.camunda.bpm.engine.delegate.ExecutionListener;
import org.camunda.bpm.engine.impl.pvm.process.ActivityImpl;
import org.camunda.bpm.engine.impl.pvm.process.TransitionImpl;
import org.camunda.bpm.engine.impl.util.xml.Element;
-
import org.onap.so.bpmn.core.WorkflowException;
import org.springframework.stereotype.Component;
import org.slf4j.Logger;
/**
* This plugin does the following:
* <ol>
- * <li>
- * Adds logic at the start of every Call Activity to remove any existing
- * WorkflowException object from the execution (saving a copy of it in a
- * different variable).
- * </li>
- * <li>
- * Adds logic at the end of every Call Activity to generate a MSOWorkflowException
- * event if there is a WorkflowException object in the execution.
- * </li>
+ * <li>Adds logic at the start of every Call Activity to remove any existing WorkflowException object from the execution
+ * (saving a copy of it in a different variable).</li>
+ * <li>Adds logic at the end of every Call Activity to generate a MSOWorkflowException event if there is a
+ * WorkflowException object in the execution.</li>
* </ol>
*/
@Component
public class WorkflowExceptionPlugin extends AbstractProcessEnginePlugin {
- private static final Logger logger = LoggerFactory.getLogger(WorkflowExceptionPlugin.class);
-
- @Override
- public void preInit(ProcessEngineConfigurationImpl processEngineConfiguration) {
- List<BpmnParseListener> preParseListeners =
- processEngineConfiguration.getCustomPreBPMNParseListeners();
-
- if (preParseListeners == null) {
- preParseListeners = new ArrayList<>();
- processEngineConfiguration.setCustomPreBPMNParseListeners(preParseListeners);
- }
-
- preParseListeners.add(new WorkflowExceptionParseListener());
- }
-
- public static class WorkflowExceptionParseListener extends AbstractBpmnParseListener {
- @Override
- public void parseProcess(Element processElement, ProcessDefinitionEntity processDefinition) {
- AtomicInteger triggerTaskIndex = new AtomicInteger(1);
- List<ActivityImpl> activities = new ArrayList<>(processDefinition.getActivities());
- recurse(activities, triggerTaskIndex);
- }
-
- /**
- * Helper method that recurses (into subprocesses) over all the listed activities.
- * @param activities a list of workflow activities
- * @param triggerTaskIndex the index of the next trigger task (mutable)
- */
- private void recurse(List<ActivityImpl> activities, AtomicInteger triggerTaskIndex) {
- for (ActivityImpl activity : activities) {
- String type = (String) activity.getProperty("type");
-
- if ("callActivity".equals(type)) {
- // Add a WorkflowExceptionResetListener to clear the WorkflowException
- // variable when each Call Activity starts.
-
- activity.addListener(
- ExecutionListener.EVENTNAME_START,
- new WorkflowExceptionResetListener());
-
- // Add a WorkflowExceptionTriggerTask after the call activity.
- // It must be a task because a listener cannot be used to generate
- // an event. Throwing BpmnError from an execution listener will
- // cause the process to die.
-
- List<PvmTransition> outTransitions =
- new ArrayList<>(activity.getOutgoingTransitions());
-
- for (PvmTransition transition : outTransitions) {
- String triggerTaskId = "WorkflowExceptionTriggerTask_" + triggerTaskIndex;
-
- ActivityImpl triggerTask = activity.getFlowScope().createActivity(triggerTaskId);
-
- ClassDelegateActivityBehavior behavior = new ClassDelegateActivityBehavior(
- WorkflowExceptionTriggerTask.class.getName(),
- new ArrayList<>(0));
-
- triggerTask.setActivityBehavior(behavior);
- triggerTask.setName("Workflow Exception Trigger Task " + triggerTaskIndex);
- triggerTaskIndex.getAndIncrement();
-
- TransitionImpl transitionImpl = (TransitionImpl) transition;
- TransitionImpl triggerTaskOutTransition = triggerTask.createOutgoingTransition();
- triggerTaskOutTransition.setDestination((ActivityImpl)transitionImpl.getDestination());
- transitionImpl.setDestination(triggerTask);
- }
- } else if ("subProcess".equals(type)) {
- recurse(new ArrayList<>(activity.getActivities()), triggerTaskIndex);
- }
- }
- }
- }
+ private static final Logger logger = LoggerFactory.getLogger(WorkflowExceptionPlugin.class);
+
+ @Override
+ public void preInit(ProcessEngineConfigurationImpl processEngineConfiguration) {
+ List<BpmnParseListener> preParseListeners = processEngineConfiguration.getCustomPreBPMNParseListeners();
+
+ if (preParseListeners == null) {
+ preParseListeners = new ArrayList<>();
+ processEngineConfiguration.setCustomPreBPMNParseListeners(preParseListeners);
+ }
+
+ preParseListeners.add(new WorkflowExceptionParseListener());
+ }
+
+ public static class WorkflowExceptionParseListener extends AbstractBpmnParseListener {
+ @Override
+ public void parseProcess(Element processElement, ProcessDefinitionEntity processDefinition) {
+ AtomicInteger triggerTaskIndex = new AtomicInteger(1);
+ List<ActivityImpl> activities = new ArrayList<>(processDefinition.getActivities());
+ recurse(activities, triggerTaskIndex);
+ }
+
+ /**
+ * Helper method that recurses (into subprocesses) over all the listed activities.
+ *
+ * @param activities a list of workflow activities
+ * @param triggerTaskIndex the index of the next trigger task (mutable)
+ */
+ private void recurse(List<ActivityImpl> activities, AtomicInteger triggerTaskIndex) {
+ for (ActivityImpl activity : activities) {
+ String type = (String) activity.getProperty("type");
+
+ if ("callActivity".equals(type)) {
+ // Add a WorkflowExceptionResetListener to clear the WorkflowException
+ // variable when each Call Activity starts.
+
+ activity.addListener(ExecutionListener.EVENTNAME_START, new WorkflowExceptionResetListener());
+
+ // Add a WorkflowExceptionTriggerTask after the call activity.
+ // It must be a task because a listener cannot be used to generate
+ // an event. Throwing BpmnError from an execution listener will
+ // cause the process to die.
+
+ List<PvmTransition> outTransitions = new ArrayList<>(activity.getOutgoingTransitions());
+
+ for (PvmTransition transition : outTransitions) {
+ String triggerTaskId = "WorkflowExceptionTriggerTask_" + triggerTaskIndex;
+
+ ActivityImpl triggerTask = activity.getFlowScope().createActivity(triggerTaskId);
+
+ ClassDelegateActivityBehavior behavior = new ClassDelegateActivityBehavior(
+ WorkflowExceptionTriggerTask.class.getName(), new ArrayList<>(0));
+
+ triggerTask.setActivityBehavior(behavior);
+ triggerTask.setName("Workflow Exception Trigger Task " + triggerTaskIndex);
+ triggerTaskIndex.getAndIncrement();
+
+ TransitionImpl transitionImpl = (TransitionImpl) transition;
+ TransitionImpl triggerTaskOutTransition = triggerTask.createOutgoingTransition();
+ triggerTaskOutTransition.setDestination((ActivityImpl) transitionImpl.getDestination());
+ transitionImpl.setDestination(triggerTask);
+ }
+ } else if ("subProcess".equals(type)) {
+ recurse(new ArrayList<>(activity.getActivities()), triggerTaskIndex);
+ }
+ }
+ }
+ }
/**
- * If there is a WorkflowException object in the execution, this method
- * removes it (saving a copy of it in a different variable).
+ * If there is a WorkflowException object in the execution, this method removes it (saving a copy of it in a
+ * different variable).
*/
- public static class WorkflowExceptionResetListener implements ExecutionListener {
- public void notify(DelegateExecution execution) throws Exception {
- Object workflowException = execution.getVariable("WorkflowException");
+ public static class WorkflowExceptionResetListener implements ExecutionListener {
+ public void notify(DelegateExecution execution) throws Exception {
+ Object workflowException = execution.getVariable("WorkflowException");
- if (workflowException instanceof WorkflowException) {
- int index = 1;
- String saveName = "SavedWorkflowException" + index;
- while (execution.getVariable(saveName) != null) {
- saveName = "SavedWorkflowException" + (++index);
- }
+ if (workflowException instanceof WorkflowException) {
+ int index = 1;
+ String saveName = "SavedWorkflowException" + index;
+ while (execution.getVariable(saveName) != null) {
+ saveName = "SavedWorkflowException" + (++index);
+ }
- logger.debug("WorkflowExceptionResetTask is moving WorkflowException to " + saveName);
+ logger.debug("WorkflowExceptionResetTask is moving WorkflowException to " + saveName);
- execution.setVariable(saveName, workflowException);
- execution.setVariable("WorkflowException", null);
- }
- }
- }
+ execution.setVariable(saveName, workflowException);
+ execution.setVariable("WorkflowException", null);
+ }
+ }
+ }
/**
- * Generates an MSOWorkflowException event if there is a WorkflowException
- * object in the execution.
+ * Generates an MSOWorkflowException event if there is a WorkflowException object in the execution.
*/
- public static class WorkflowExceptionTriggerTask implements JavaDelegate {
- public void execute(DelegateExecution execution) throws Exception {
- if (execution.getVariable("WorkflowException") instanceof WorkflowException) {
- logger.debug("WorkflowExceptionTriggerTask is generating a MSOWorkflowException event");
- throw new BpmnError("MSOWorkflowException");
- }
- }
- }
+ public static class WorkflowExceptionTriggerTask implements JavaDelegate {
+ public void execute(DelegateExecution execution) throws Exception {
+ if (execution.getVariable("WorkflowException") instanceof WorkflowException) {
+ logger.debug("WorkflowExceptionTriggerTask is generating a MSOWorkflowException event");
+ throw new BpmnError("MSOWorkflowException");
+ }
+ }
+ }
}
Code Review / so.git / blobdiff