25.1.9.2 Waiting for a Signal to Continue

Send users a page link, wait for their response, and continue the workflow from application logic.

Your workflow can notify a user with a Send E-Mail or Send Push Notification activity. Either can include a link in the message. By clicking or tapping the link, the recipient navigates to the page to provide their input. After notifying the user, the next step in the flow can be a Wait activity with no Timeout Type set. This causes the workflow instance to wait indefinitely until some code calls CONTINUE_ACTIVITY in the APEX_WORKFLOW package to tell the workflow to move on. When invoking this method to continue a workflow activity that's currently waiting, you need to pass in:

• The unique ID of the workflow instance
• The unique Static ID of the activity to continue (typically a Wait activity)

When continuing a waiting activity, you can also optionally pass a list of name/value pairs. If any of the names in this list match the names of workflow variables, their values get assigned automatically to the corresponding value you return.

• Enabling Deep Linking to a Specific Page
  Enable Deep Linking so notification links can open a specific application page.
• Generating Page URL for Notification
  Generate an absolute page URL for email or push notification links.
• Emailing User a Page Link
  Email a user an absolute page link generated from workflow activity data.
• Delivering Push Notification with Page Link
  Send a push notification with an absolute page link generated from workflow activity data.
• Waiting Until Application Logic Continues
  Pause a workflow with a Wait activity until application logic continues it.
• Navigating to Page Using Email Link
  Open a notification link to enter requested data on a deep-linked page.
• Retrieving Title and Activity Labels
  Retrieve workflow and activity labels to show context on the data entry page.
• Signaling to Continue and Returning Data
  Continue a waiting workflow activity and return submitted values to workflow variables.
• Inspecting Resulting Workflow Instance
  Inspect workflow variables and diagram progress after a waiting activity continues.
• Evaluating Benefits of Using Tasks Instead
  Consider using tasks when user input needs tracking, reminders, and a task inbox.