use of org.camunda.bpm.engine.impl.core.model.CoreModelElement in project camunda-bpm-platform by camunda.
the class AbstractInstantiationCmd method execute.
public Void execute(final CommandContext commandContext) {
ExecutionEntity processInstance = commandContext.getExecutionManager().findExecutionById(processInstanceId);
final ProcessDefinitionImpl processDefinition = processInstance.getProcessDefinition();
CoreModelElement elementToInstantiate = getTargetElement(processDefinition);
EnsureUtil.ensureNotNull(NotValidException.class, describeFailure("Element '" + getTargetElementId() + "' does not exist in process '" + processDefinition.getId() + "'"), "element", elementToInstantiate);
// rebuild the mapping because the execution tree changes with every iteration
final ActivityExecutionTreeMapping mapping = new ActivityExecutionTreeMapping(commandContext, processInstanceId);
// before instantiating an activity, two things have to be determined:
//
// activityStack:
// For the activity to instantiate, we build a stack of parent flow scopes
// for which no executions exist yet and that have to be instantiated
//
// scopeExecution:
// This is typically the execution under which a new sub tree has to be created.
// if an explicit ancestor activity instance is set:
// - this is the scope execution for that ancestor activity instance
// - throws exception if that scope execution is not in the parent hierarchy
// of the activity to be started
// if no explicit ancestor activity instance is set:
// - this is the execution of the first parent/ancestor flow scope that has an execution
// - throws an exception if there is more than one such execution
ScopeImpl targetFlowScope = getTargetFlowScope(processDefinition);
// prepare to walk up the flow scope hierarchy and collect the flow scope activities
ActivityStackCollector stackCollector = new ActivityStackCollector();
FlowScopeWalker walker = new FlowScopeWalker(targetFlowScope);
walker.addPreVisitor(stackCollector);
ExecutionEntity scopeExecution = null;
// if no explicit ancestor activity instance is set
if (ancestorActivityInstanceId == null) {
// walk until a scope is reached for which executions exist
walker.walkWhile(new ReferenceWalker.WalkCondition<ScopeImpl>() {
public boolean isFulfilled(ScopeImpl element) {
return !mapping.getExecutions(element).isEmpty() || element == processDefinition;
}
});
Set<ExecutionEntity> flowScopeExecutions = mapping.getExecutions(walker.getCurrentElement());
if (flowScopeExecutions.size() > 1) {
throw new ProcessEngineException("Ancestor activity execution is ambiguous for activity " + targetFlowScope);
}
scopeExecution = flowScopeExecutions.iterator().next();
} else {
ActivityInstance tree = commandContext.runWithoutAuthorization(new Callable<ActivityInstance>() {
public ActivityInstance call() throws Exception {
return new GetActivityInstanceCmd(processInstanceId).execute(commandContext);
}
});
ActivityInstance ancestorInstance = findActivityInstance(tree, ancestorActivityInstanceId);
EnsureUtil.ensureNotNull(NotValidException.class, describeFailure("Ancestor activity instance '" + ancestorActivityInstanceId + "' does not exist"), "ancestorInstance", ancestorInstance);
// determine ancestor activity scope execution and activity
final ExecutionEntity ancestorScopeExecution = getScopeExecutionForActivityInstance(processInstance, mapping, ancestorInstance);
final PvmScope ancestorScope = getScopeForActivityInstance(processDefinition, ancestorInstance);
// walk until the scope of the ancestor scope execution is reached
walker.walkWhile(new ReferenceWalker.WalkCondition<ScopeImpl>() {
public boolean isFulfilled(ScopeImpl element) {
return (mapping.getExecutions(element).contains(ancestorScopeExecution) && element == ancestorScope) || element == processDefinition;
}
});
Set<ExecutionEntity> flowScopeExecutions = mapping.getExecutions(walker.getCurrentElement());
if (!flowScopeExecutions.contains(ancestorScopeExecution)) {
throw new NotValidException(describeFailure("Scope execution for '" + ancestorActivityInstanceId + "' cannot be found in parent hierarchy of flow element '" + elementToInstantiate.getId() + "'"));
}
scopeExecution = ancestorScopeExecution;
}
List<PvmActivity> activitiesToInstantiate = stackCollector.getActivityStack();
Collections.reverse(activitiesToInstantiate);
// We have to make a distinction between
// - "regular" activities for which the activity stack can be instantiated and started
// right away
// - interrupting or cancelling activities for which we have to ensure that
// the interruption and cancellation takes place before we instantiate the activity stack
ActivityImpl topMostActivity = null;
ScopeImpl flowScope = null;
if (!activitiesToInstantiate.isEmpty()) {
topMostActivity = (ActivityImpl) activitiesToInstantiate.get(0);
flowScope = topMostActivity.getFlowScope();
} else if (ActivityImpl.class.isAssignableFrom(elementToInstantiate.getClass())) {
topMostActivity = (ActivityImpl) elementToInstantiate;
flowScope = topMostActivity.getFlowScope();
} else if (TransitionImpl.class.isAssignableFrom(elementToInstantiate.getClass())) {
TransitionImpl transitionToInstantiate = (TransitionImpl) elementToInstantiate;
flowScope = transitionToInstantiate.getSource().getFlowScope();
}
if (!supportsConcurrentChildInstantiation(flowScope)) {
throw new ProcessEngineException("Concurrent instantiation not possible for " + "activities in scope " + flowScope.getId());
}
ActivityStartBehavior startBehavior = ActivityStartBehavior.CONCURRENT_IN_FLOW_SCOPE;
if (topMostActivity != null) {
startBehavior = topMostActivity.getActivityStartBehavior();
if (!activitiesToInstantiate.isEmpty()) {
// this is in BPMN relevant if there is an interrupting event sub process.
// we have to distinguish between instantiation of the start event and any other activity.
// instantiation of the start event means interrupting behavior; instantiation
// of any other task means no interruption.
PvmActivity initialActivity = topMostActivity.getProperties().get(BpmnProperties.INITIAL_ACTIVITY);
PvmActivity secondTopMostActivity = null;
if (activitiesToInstantiate.size() > 1) {
secondTopMostActivity = activitiesToInstantiate.get(1);
} else if (ActivityImpl.class.isAssignableFrom(elementToInstantiate.getClass())) {
secondTopMostActivity = (PvmActivity) elementToInstantiate;
}
if (initialActivity != secondTopMostActivity) {
startBehavior = ActivityStartBehavior.CONCURRENT_IN_FLOW_SCOPE;
}
}
}
switch(startBehavior) {
case CANCEL_EVENT_SCOPE:
{
ScopeImpl scopeToCancel = topMostActivity.getEventScope();
ExecutionEntity executionToCancel = getSingleExecutionForScope(mapping, scopeToCancel);
if (executionToCancel != null) {
executionToCancel.deleteCascade("Cancelling activity " + topMostActivity + " executed.", skipCustomListeners, skipIoMappings);
instantiate(executionToCancel.getParent(), activitiesToInstantiate, elementToInstantiate);
} else {
ExecutionEntity flowScopeExecution = getSingleExecutionForScope(mapping, topMostActivity.getFlowScope());
instantiateConcurrent(flowScopeExecution, activitiesToInstantiate, elementToInstantiate);
}
break;
}
case INTERRUPT_EVENT_SCOPE:
{
ScopeImpl scopeToCancel = topMostActivity.getEventScope();
ExecutionEntity executionToCancel = getSingleExecutionForScope(mapping, scopeToCancel);
executionToCancel.interrupt("Interrupting activity " + topMostActivity + " executed.", skipCustomListeners, skipIoMappings);
executionToCancel.setActivity(null);
executionToCancel.leaveActivityInstance();
instantiate(executionToCancel, activitiesToInstantiate, elementToInstantiate);
break;
}
case INTERRUPT_FLOW_SCOPE:
{
ScopeImpl scopeToCancel = topMostActivity.getFlowScope();
ExecutionEntity executionToCancel = getSingleExecutionForScope(mapping, scopeToCancel);
executionToCancel.interrupt("Interrupting activity " + topMostActivity + " executed.", skipCustomListeners, skipIoMappings);
executionToCancel.setActivity(null);
executionToCancel.leaveActivityInstance();
instantiate(executionToCancel, activitiesToInstantiate, elementToInstantiate);
break;
}
default:
{
// or this execution has ended executing its scope, it can be reused
if (!scopeExecution.hasChildren() && (scopeExecution.getActivity() == null || scopeExecution.isEnded())) {
// reuse the scope execution
instantiate(scopeExecution, activitiesToInstantiate, elementToInstantiate);
} else {
// if the activity is not cancelling/interrupting, it can simply be instantiated as
// a concurrent child of the scopeExecution
instantiateConcurrent(scopeExecution, activitiesToInstantiate, elementToInstantiate);
}
break;
}
}
return null;
}
use of org.camunda.bpm.engine.impl.core.model.CoreModelElement in project camunda-bpm-platform by camunda.
the class StartProcessInstanceAtActivitiesCmd method determineFirstActivity.
/**
* get the activity that is started by the first instruction, if exists;
* return null if the first instruction is a start-transition instruction
*/
protected ActivityImpl determineFirstActivity(ProcessDefinitionImpl processDefinition, ProcessInstanceModificationBuilderImpl modificationBuilder) {
AbstractProcessInstanceModificationCommand firstInstruction = modificationBuilder.getModificationOperations().get(0);
if (firstInstruction instanceof AbstractInstantiationCmd) {
AbstractInstantiationCmd instantiationInstruction = (AbstractInstantiationCmd) firstInstruction;
CoreModelElement targetElement = instantiationInstruction.getTargetElement(processDefinition);
ensureNotNull(NotValidException.class, "Element '" + instantiationInstruction.getTargetElementId() + "' does not exist in process " + processDefinition.getId(), "targetElement", targetElement);
if (targetElement instanceof ActivityImpl) {
return (ActivityImpl) targetElement;
} else if (targetElement instanceof TransitionImpl) {
return (ActivityImpl) ((TransitionImpl) targetElement).getDestination();
}
}
return null;
}
use of org.camunda.bpm.engine.impl.core.model.CoreModelElement in project camunda-bpm-platform by camunda.
the class AbstractEventAtomicOperation method execute.
public void execute(T execution) {
CoreModelElement scope = getScope(execution);
List<DelegateListener<? extends BaseDelegateExecution>> listeners = getListeners(scope, execution);
int listenerIndex = execution.getListenerIndex();
if (listenerIndex == 0) {
execution = eventNotificationsStarted(execution);
}
if (!isSkipNotifyListeners(execution)) {
if (listeners.size() > listenerIndex) {
execution.setEventName(getEventName());
execution.setEventSource(scope);
DelegateListener<? extends BaseDelegateExecution> listener = listeners.get(listenerIndex);
try {
execution.setListenerIndex(listenerIndex + 1);
execution.invokeListener(listener);
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new PvmException("couldn't execute event listener : " + e.getMessage(), e);
}
execution.performOperationSync(this);
} else {
execution.setListenerIndex(0);
execution.setEventName(null);
execution.setEventSource(null);
eventNotificationsCompleted(execution);
}
} else {
eventNotificationsCompleted(execution);
}
}
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