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Version: 2

Enqueue Flow (Queueable)

  • Category​

    • Flow
    • Asynchronous
    • Queueable
    • Performance

  • Flow Icon​

Overview​

The Enqueue Flow (Queueable) component lets you run an Autolaunched Flow asynchronously via Queueable Apex.
This is ideal for large data sets or long-running operations that might exceed Flow limits when executed synchronously.
You provide the Flow API Name and input parameters; the component enqueues a background job and returns the AsyncApexJob Id.

info

Notes: This action does not wait for the Flow to finish. It returns immediately with a job Id you can track.

Inputs​

  1. flowName (Required)
    The API Name of the Autolaunched Flow to run (e.g., Mass_Update_Opportunities, My_Autolaunched_Flow).

  2. parameters (Required)
    A collection of key/value pairs to pass as inputs to the Flow, using PlinqxV2.RequestKeyValuePair.

    • Each pair should match an input variable in the target Flow (names are case-sensitive to the Flow variable API names).
    • Typical structure is a key (the Flow variable name) and a value (stringified value).
    • Provide one pair per Flow input you need to set.

Ensure the target Flow variables are Available for input.

Outputs​

  1. jobId
    The Id of the enqueued AsyncApexJob. Use it to monitor job status (e.g., with Setup → Apex Jobs or SOQL on AsyncApexJob).

How it Works (Queueable Runtime)​

  • The invocable engine enqueues a Queueable job with your flowName and parameters.
  • The Queueable job:
    1. Creates a Flow interview for flowName and starts it.
    2. Reads a Flow output variable named valueOut (type: List<PlinqxV2.RequestKeyValuePair>).
    3. Looks for two control keys in that output:
      • done — Boolean ("true" / "false")
      • error — Boolean ("true" / "false")
    4. Behavior:
      • If done = false and error = false: the job re-queues itself with the remaining key/values from valueOut (after removing the done flag). This lets you iterate work over multiple queueable executions with fresh limits each time.
      • If done = true or error = true: processing stops (no further re-queue).
      • If done is missing: an exception is thrown (Flow response key 'done' not found).

Flow Contract (Required in the Target Flow)​

Your Autolaunched Flow must implement the following:

  1. Input variables
    Create input variables that match the keys you pass in parameters (case-sensitive). Mark them Available for input.

  2. Output variable
    Create a single Flow output variable:

    • API Name: valueOut
    • Data Type: Apex-Defined
    • Apex Class: PlinqxV2.RequestKeyValuePair
    • Collection: Yes (this must be a collection of key/value pairs)
    • Mark Available for output

  3. Control flags in valueOut
    On every run, populate valueOut with at least these entries:

    • done → "true" or "false" (string Boolean)
    • error → "true" or "false" (string Boolean)

    Rules:

    • If you want the Queueable to run again (continue work), set done = "false" and error = "false", and include any state you want to carry into the next run as additional key/value pairs in valueOut.
    • If processing is complete (or has failed), set done = "true" (or error = "true"). The Queueable will not re-enqueue.

The Queueable removes the done key before re-queuing and passes the rest of valueOut back as the next parameters.

Stateful Iteration Pattern (Example)​

Use this pattern to chunk large work across multiple queueable executions:

First call (from your Flow/Process/Action):

  • parameters:
    • Offset = 0
    • PageSize = 200

Inside the target Flow (run #1):

  • Query/process records 0–199.
  • Compute next state.
  • Set valueOut:
    • done = "false" (more work remains)
    • error = "false"
    • Offset = 200
    • PageSize = 200

Queueable re-enqueues with new parameters → Offset=200.

Inside the target Flow (run #2):

  • Process 200–399 …
  • When finished:
    • done = "true"
    • error = "false"

Queueable stops (no further jobs).

Best Practices​

  • Autolaunched & Active: Target Flow must be Autolaunched and Active.
  • Implement the contract: Always return valueOut with done and error on every run. Missing done will throw an exception error.
  • Use strings for values: The key/value pairs are strings; convert inside your Flow as needed.
  • Carry state forward: Place your next-run state in valueOut (e.g., offsets, cursor ids).
  • Chunk work: Process in small batches per run so each job stays within limits.
  • Idempotency: If re-enqueuing is possible, add guards in your Flow (e.g., checkpoint keys) to avoid double-processing.
  • Monitoring: Use the Apex Jobs page and Flow error results to monitor failures/retries.
  • Error termination: Set error = "true" to stop re-queuing when an unrecoverable error occurs; consider also returning an errorMessage key for observability.

Troubleshooting​

  • “Flow response key 'done' not found.”
    Your Flow did not include done in valueOut. Ensure valueOut is an Apex-Defined collection of PlinqxV2.RequestKeyValuePair and includes done/error.

  • Flow didn’t run
    Verify the Flow API name, that it’s Autolaunched, Active, and its variables are Available for input/output as required.

  • Input mapping issues
    Check parameter keys for typos; align types (stringify as needed).

  • Governor limits inside the Flow
    Even though execution is async, your Flow must still handle data volumes efficiently (bulkify queries/DML where applicable and use the iteration pattern above).

Example Scenario — Enqueue a Bulk Update Flow​

Scenario Overview:
A Salesforce org needs to update thousands of Opportunities to a new Stage. Running this in a single synchronous Flow risks hitting limits. By using Enqueue Flow (Queueable), the work can be split into manageable chunks and processed asynchronously.

Implementation with Enqueue Flow (Queueable):

Flow Setup for Bulk Update:
Create an Autolaunched Flow named Mass_Opportunity_Update. This Flow accepts input parameters for the target Stage, as well as state variables such as Offset and PageSize that control batch processing.

Adding Enqueue Flow (Queueable) Component:
In your parent Flow or process, add the Enqueue Flow (Queueable) component and configure it with the following:

  • flowName = Mass_Opportunity_Update

  • parameters:

    • TargetStage = Closed Won

    • Offset = 0

    • PageSize = 200

First Execution:
The Queueable job launches Mass_Opportunity_Update. Inside the Flow:

  • Records 0–199 are queried and updated.

  • The Flow sets its output variable valueOut to include:

    • done = "false"

    • error = "false"

    • Offset = 200

    • PageSize = 200

Iterating with Queueable:
Because done = false, the Queueable automatically re-enqueues itself with the new state (Offset=200). The Flow runs again, processing records 200–399. This pattern continues, with each run handling the next batch of records.

Final Execution:
When no more records remain, the Flow sets valueOut:

  • done = "true"

  • error = "false"
    The Queueable stops, completing the bulk update process.

Utilizing the Output:
The component immediately returns a jobId (e.g., 707xx0000123ABC). You can track this job in Setup → Apex Jobs or via SOQL queries on AsyncApexJob.