/// <summary>
/// Returns a list of flow scopes from the given scope until a scope is reached that is already present in the given
/// <seealso cref="MigratingScopeInstanceBranch" /> (exclusive). The order of the returned list is top-down, i.e. the
/// highest scope
/// is the first element of the list.
/// </summary>
//JAVA TO C# CONVERTER WARNING: 'final' parameters are not available in .NET:
//ORIGINAL LINE: protected java.Util.List<org.camunda.bpm.engine.impl.Pvm.Process.ScopeImpl> collectNonExistingFlowScopes(org.camunda.bpm.engine.impl.Pvm.Process.ScopeImpl scope, final MigratingScopeInstanceBranch migratingExecutionBranch)
protected internal virtual IList <ScopeImpl> CollectNonExistingFlowScopes(ScopeImpl scope,
MigratingScopeInstanceBranch migratingExecutionBranch)
{
var walker = new FlowScopeWalker(scope);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final java.Util.List<org.camunda.bpm.engine.impl.Pvm.Process.ScopeImpl> result = new java.Util.LinkedList<org.camunda.bpm.engine.impl.Pvm.Process.ScopeImpl>();
IList <ScopeImpl> result = new List <ScopeImpl>();
walker.AddPreVisitor(new TreeVisitorAnonymousInnerClass(this, result));
//walker.walkWhile(new WalkConditionAnonymousInnerClass(this, migratingExecutionBranch));
return(result);
}
//JAVA TO C# CONVERTER WARNING: 'final' parameters are not available in .NET:
//ORIGINAL LINE: @Override public void validate(ValidatingMigrationInstruction instruction, final ValidatingMigrationInstructions instructions, MigrationInstructionValidationReportImpl report)
public virtual void Validate(IValidatingMigrationInstruction instruction,
ValidatingMigrationInstructions instructions, MigrationInstructionValidationReportImpl report)
{
var targetActivity = instruction.TargetActivity;
var flowScopeWalker = new FlowScopeWalker(targetActivity.FlowScope);
var miBodyCollector = new MiBodyCollector();
flowScopeWalker.AddPreVisitor(miBodyCollector);
// walk until a target scope is found that is mapped
//flowScopeWalker.walkWhile(new WalkConditionAnonymousInnerClass(this, instructions));
if (miBodyCollector.FirstMiBody != null)
{
report.AddFailure("Target activity '" + targetActivity.Id + "' is a descendant of multi-instance body '" +
miBodyCollector.FirstMiBody.Id +
"' that is not mapped from the source process definition.");
}
}
public override object Execute(CommandContext commandContext)
{
ExecutionEntity processInstance = commandContext.ExecutionManager.FindExecutionById(processInstanceId);
ProcessDefinitionImpl processDefinition = processInstance.GetProcessDefinition();
CoreModelElement elementToInstantiate = GetTargetElement(processDefinition);
EnsureUtil.EnsureNotNull(typeof(NotValidException), DescribeFailure("Element '" + TargetElementId + "' does not exist in process '" + processDefinition.Id + "'"), "element", elementToInstantiate);
// rebuild the mapping because the execution tree changes with every iteration
var 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
var targetFlowScope = GetTargetFlowScope(processDefinition);
// prepare to walk up the flow scope hierarchy and collect the flow scope activities
var stackCollector = new ActivityStackCollector();
var walker = new FlowScopeWalker(targetFlowScope);
walker.AddPreVisitor(stackCollector);
ExecutionEntity scopeExecution = null;
// if no explicit ancestor activity instance is set
if (ReferenceEquals(AncestorActivityInstanceId, null))
{
// walk until a scope is reached for which executions exist
walker.WalkWhile((element) => mapping.GetExecutions(element)
.Count > 0 || element == processDefinition);
var flowScopeExecutions = mapping.GetExecutions(walker.CurrentElement);
if (flowScopeExecutions.Count > 1)
{
throw new ProcessEngineException("Ancestor activity execution is ambiguous for activity " +
targetFlowScope);
}
//scopeExecution = flowScopeExecutions.GetEnumerator().Next();
scopeExecution = flowScopeExecutions.First();
}
var activitiesToInstantiate = stackCollector.ActivityStack;
activitiesToInstantiate.Reverse();
// 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.Count > 0)
{
topMostActivity = (ActivityImpl)activitiesToInstantiate[0];
flowScope = topMostActivity.FlowScope;
}
else if (elementToInstantiate is ActivityImpl)
{
topMostActivity = (ActivityImpl)elementToInstantiate;
flowScope = topMostActivity.FlowScope;
}
else if (elementToInstantiate is TransitionImpl)
{
var transitionToInstantiate = (TransitionImpl)elementToInstantiate;
flowScope = transitionToInstantiate.Source.FlowScope;
}
if (!SupportsConcurrentChildInstantiation(flowScope))
{
throw new ProcessEngineException("Concurrent instantiation not possible for " + "activities in scope " +
flowScope.Id);
}
var startBehavior = ActivityStartBehavior.ConcurrentInFlowScope;
if (topMostActivity != null)
{
startBehavior = topMostActivity.ActivityStartBehavior;
if (activitiesToInstantiate.Count > 0)
{
// 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 ITask means no interruption.
IPvmActivity initialActivity = topMostActivity.Properties.Get(BpmnProperties.InitialActivity);
IPvmActivity secondTopMostActivity = null;
if (activitiesToInstantiate.Count > 1)
{
secondTopMostActivity = activitiesToInstantiate[1];
}
else if (elementToInstantiate.GetType().IsSubclassOf(typeof(ActivityImpl)))
{
secondTopMostActivity = (IPvmActivity)elementToInstantiate;
}
if (initialActivity != secondTopMostActivity)
{
startBehavior = ActivityStartBehavior.ConcurrentInFlowScope;
}
}
}
//throw new Exception("startBehavior值："+(int)startBehavior);//2
switch (startBehavior)
{
case ActivityStartBehavior.CancelEventScope:
{
ScopeImpl scopeToCancel = (ScopeImpl)topMostActivity.EventScope;
var executionToCancel = GetSingleExecutionForScope(mapping, scopeToCancel);
if (executionToCancel != null)
{
executionToCancel.DeleteCascade("Cancelling activity " + topMostActivity + " executed.",
skipCustomListeners, skipIoMappings);
Instantiate(executionToCancel.Parent, activitiesToInstantiate, elementToInstantiate);
}
else
{
var flowScopeExecution = GetSingleExecutionForScope(mapping, topMostActivity.FlowScope);
InstantiateConcurrent(flowScopeExecution, activitiesToInstantiate, elementToInstantiate);
}
break;
}
case ActivityStartBehavior.InterruptEventScope:
{
ScopeImpl scopeToCancel = (ScopeImpl)topMostActivity.EventScope;
var executionToCancel = GetSingleExecutionForScope(mapping, scopeToCancel);
executionToCancel.Interrupt("Interrupting activity " + topMostActivity + " executed.",
skipCustomListeners, skipIoMappings);
executionToCancel.SetActivity(null);
executionToCancel.LeaveActivityInstance();
Instantiate(executionToCancel, activitiesToInstantiate, elementToInstantiate);
break;
}
case ActivityStartBehavior.InterruptFlowScope:
{
var scopeToCancel = topMostActivity.FlowScope;
var executionToCancel = GetSingleExecutionForScope(mapping, scopeToCancel);
executionToCancel.Interrupt("Interrupting activity " + topMostActivity + " executed.",
skipCustomListeners, skipIoMappings);
executionToCancel.SetActivity(null);
executionToCancel.LeaveActivityInstance();
Instantiate(executionToCancel, activitiesToInstantiate, elementToInstantiate);
break;
}
default:
{
// if all child executions have been cancelled
// 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);
}