protected internal override void instantiateScopes(MigratingScopeInstance ancestorScopeInstance, MigratingScopeInstanceBranch executionBranch, IList <ScopeImpl> scopesToInstantiate)
{
if (scopesToInstantiate.Count == 0)
{
return;
}
ExecutionEntity ancestorScopeExecution = ancestorScopeInstance.resolveRepresentativeExecution();
ExecutionEntity parentExecution = ancestorScopeExecution;
foreach (ScopeImpl scope in scopesToInstantiate)
{
ExecutionEntity compensationScopeExecution = parentExecution.createExecution();
compensationScopeExecution.Scope = true;
compensationScopeExecution.EventScope = true;
compensationScopeExecution.setActivity((PvmActivity)scope);
compensationScopeExecution.Active = false;
compensationScopeExecution.activityInstanceStarting();
compensationScopeExecution.enterActivityInstance();
EventSubscriptionEntity eventSubscription = EventSubscriptionEntity.createAndInsert(parentExecution, EventType.COMPENSATE, (ActivityImpl)scope);
eventSubscription.Configuration = compensationScopeExecution.Id;
executionBranch.visited(new MigratingEventScopeInstance(eventSubscription, compensationScopeExecution, scope));
parentExecution = compensationScopeExecution;
}
}
protected internal override ICollection <MigrationContext> nextElements()
{
ICollection <MigrationContext> nextElements = new LinkedList <MigrationContext>();
MigrationContext currentElement = CurrentElement;
// continue migration for non-leaf instances (i.e. scopes)
if (currentElement.processElementInstance is MigratingScopeInstance)
{
// Child instances share the same scope instance branch;
// This ensures "once-per-parent" instantiation semantics,
// i.e. if a new parent scope is added to more than one child, all those children
// will share the same new parent instance.
// By changing the way how the branches are created here, it should be possible
// to implement other strategies, e.g. "once-per-child" semantics
MigratingScopeInstanceBranch childrenScopeBranch = currentElement.scopeInstanceBranch.copy();
MigratingScopeInstanceBranch childrenCompensationScopeBranch = currentElement.scopeInstanceBranch.copy();
MigratingScopeInstance scopeInstance = (MigratingScopeInstance)currentElement.processElementInstance;
childrenScopeBranch.visited(scopeInstance);
childrenCompensationScopeBranch.visited(scopeInstance);
foreach (MigratingProcessElementInstance child in scopeInstance.Children)
{
MigratingScopeInstanceBranch instanceBranch = null;
// compensation and non-compensation scopes cannot share the same scope instance branch
// e.g. when adding a sub process, we want to create a new activity instance as well
// as a new event scope instance for that sub process
if (child is MigratingEventScopeInstance || child is MigratingCompensationEventSubscriptionInstance)
{
instanceBranch = childrenCompensationScopeBranch;
}
else
{
instanceBranch = childrenScopeBranch;
}
nextElements.Add(new MigrationContext(child, instanceBranch));
}
}
return(nextElements);
}
protected internal override void instantiateScopes(MigratingScopeInstance ancestorScopeInstance, MigratingScopeInstanceBranch executionBranch, IList <ScopeImpl> scopesToInstantiate)
{
if (scopesToInstantiate.Count == 0)
{
return;
}
// must always be an activity instance
MigratingActivityInstance ancestorActivityInstance = (MigratingActivityInstance)ancestorScopeInstance;
ExecutionEntity newParentExecution = ancestorActivityInstance.createAttachableExecution();
IDictionary <PvmActivity, PvmExecutionImpl> createdExecutions = newParentExecution.instantiateScopes((System.Collections.IList)scopesToInstantiate, skipCustomListeners, skipIoMappings);
foreach (ScopeImpl scope in scopesToInstantiate)
{
ExecutionEntity createdExecution = (ExecutionEntity)createdExecutions[scope];
createdExecution.setActivity(null);
createdExecution.Active = false;
executionBranch.visited(new MigratingActivityInstance(scope, createdExecution));
}
}