Terminate a workflow programmatically and display custom error message on the page

Hi @sagarkmr 

you can terminate a workflow using the  workflowSession.terminateWorkflow(workflow) approach to terminate the workflow programmatically and provide a user-visible message.

Workflow workflow = workflowSession.getWorkflow(item.getWorkflow().getId());
workflowSession.terminateWorkflow(workflow);

you can send an aem inbox notification as well using below code:

String message = "The provided path is invalid or does not exist: " + path;

InboxNotification inboxNotification = inboxNotificationSender.buildInboxNotification();
inboxNotification.setTitle("Invalid Path Notification");
inboxNotification.setContentPath(path);
inboxNotification.setAssignee(user);
inboxNotification.setMessage(message);

inboxNotificationSender.sendInboxNotification(adminResolver, inboxNotification);

or as @konstantyn_diachenko  suggested, You can utilize the workflow metadata (MetaDataMap) to set a termination message, which users can view in the Workflow Instances or AEM logs.

workflow.getMetaDataMap().put("terminationMessage", "The specified path does not exist: " + path);

Hope this helps!

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