Copilot commented on code in PR #8516:
URL: https://github.com/apache/texera/pull/8516#discussion_r3994390842
##########
frontend/src/app/workspace/component/workflow-form/workflow-form.component.ts:
##########
@@ -1301,40 +1526,56 @@ export class WorkflowFormComponent implements OnInit,
OnDestroy {
* workflow when the payload has no id, so saving whatever the graph holds
would spawn
* stray "Untitled workflow" rows when the page is left before its workflow
loaded.
*/
- private save(): void {
+ private save(afterwards?: () => void): void {
// A read-only viewer can open and run the form (execution is gated on
computing-unit access,
// not workflow access) but must never persist: every such save is a
guaranteed 403 that would
// spam "Could not save" on each debounce. Their inputs are non-editable,
so nothing is lost.
+ // `afterwards` runs once the save has completed, or at once when there is
nothing to save;
+ // it does not run when the save fails, so a caller that navigates on it
stays put instead.
if (!this.canEdit) {
+ afterwards?.();
return;
}
if (!this.userService.isLogin() ||
!this.workflowPersistService.isWorkflowPersistEnabled()) {
+ afterwards?.();
return;
}
const workflow = this.workflowActionService.getWorkflow();
if (workflow.wid === undefined || workflow.wid !== this.wid) {
+ afterwards?.();
return;
}
+ if (this.destroyed) {
+ // On the way out there is no page left to queue on, and the request
must NOT be tied to this
+ // component: ngOnDestroy calls save(), and untilDestroyed would tear
the subscription down as
+ // part of the very same destroy sequence, aborting the request that was
the point of the
+ // call. The persist is a one-shot HTTP request that completes on its
own, so it needs no
+ // teardown operator; the error is reported inside persistNow.
+ // eslint-disable-next-line rxjs-angular/prefer-takeuntil
+ this.persistNow().subscribe({ error: () => undefined });
Review Comment:
This destroy-time save bypasses `persistQueue`, so it can run concurrently
with an autosave already in flight. Unsubscribing that older HTTP observable
after `ngOnDestroy` returns cannot guarantee that the backend cancels a request
it already received; the older snapshot can still commit after this final
snapshot, recreating the out-of-order overwrite the queue was added to prevent.
Preserve ordering during teardown—for example, queue captured snapshots in a
drain that may outlive the component—instead of starting an uncoordinated
persist.
##########
frontend/src/app/workspace/component/workflow-form/workflow-form.component.ts:
##########
@@ -510,11 +545,41 @@ export class WorkflowFormComponent implements OnInit,
OnDestroy {
}
/**
- * Show the workflow rather than edit it: the graph shape and its properties
are read-only
- * on this page. A later PR's authoring mode makes properties editable with
write access.
+ * Whether this page may hold the graph unlocked: a writer in edit mode, and
no run in flight. The
+ * run rule is the canvas's own (a run locks the graph until it ends), kept
here too so that entering
+ * edit mode mid-run cannot undo it. Every other state is locked, so a
reader, or a writer merely
+ * viewing, cannot change the workflow through this page.
*/
+ private mayUnlock(): boolean {
+ return this.authoring && this.canEdit && !this.isRunning;
+ }
+
+ /** Lock or unlock editing from the current state (see mayUnlock); the one
reducer for both directions. */
private applyEditability(): void {
- this.workflowActionService.disableWorkflowModification();
+ if (this.mayUnlock()) {
+ this.workflowActionService.enableWorkflowModification();
+ } else {
+ this.workflowActionService.disableWorkflowModification();
+ }
+ }
+
+ /**
+ * The lock is a root-level flag with writers that know nothing of this
page: the execute service
+ * unlocks it whenever a run ends (completed, failed, killed, reset), the
computing-unit selector
+ * unlocks it when it finds no run on the chosen unit, and any future caller
may too. Rather than
+ * chase each one, clamp at the one place they all report to: whenever the
flag turns on while this
+ * page must stay locked, turn it off again. In edit mode the canvas rule
then stands unchanged:
+ * locked while a run is in flight, unlocked by the execute service once it
ends.
+ */
+ private clampEditability(): void {
+ this.workflowActionService
+ .getWorkflowModificationEnabledStream()
+ .pipe(untilDestroyed(this))
+ .subscribe(enabled => {
+ if (enabled && !this.mayUnlock()) {
+ this.workflowActionService.disableWorkflowModification();
Review Comment:
`ExecuteWorkflowService.updateExecutionState()` enables modification before
it updates and emits the terminal execution state
(`execute-workflow.service.ts:371-379,385-393`). Consequently, when a run
completes this callback still sees the component's previous `Running` state,
disables modification again, and the later execution-state handler never
reapplies editability. Edit mode therefore remains locked after every run.
Reconcile editability after assigning `current.state`, and make the regression
test emit the unlock before the completion event to match production ordering.
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