# lam.asyncExecute

## Functionality

The `asyncExecute` keyword executes each specified workflow in parallel. Unlike `lam.execute`, this keyword runs workflows **asynchronously** and does not block the current workflow's execution.

## Invocation

Data transformation must output:

```javascript
{
  "lam.asyncExecute": [
    {
      "lam.workflowId": 39,
      "lam.payload": { /* payload data */ }
    }
  ]
}
```

| Key          | Description                              | Type                           |
| ------------ | ---------------------------------------- | ------------------------------ |
| asyncExecute | The workflows to execute with a payload  | Array<{ workflowId, payload }> |
| workflowId   | The workflow ID to invoke asynchronously | Integer                        |
| payload      | The payload to pass to the workflow      | Object                         |

## Examples

```javascript
(payload) => {
  const { input } = payload;
  const { Recipient, PackagesInfo } = input;
  
  const packagePayloads = PackagesInfo.Packages.map(pkg => ({
    "lam.workflowId": 39,
    "lam.payload": {
      address_1: Recipient.Address1,
      address_2: Recipient.Address2,
      EXT_FIELD_first_name: Recipient.Firstname,
      EXT_FIELD_last_name: Recipient.Name,
      EXT_FIELD_email: Recipient.Email,
      EXT_FIELD_phone: Recipient.Tel,
      EXT_FIELD_weight: pkg.Weight.Value,
      custom_user_fields: [
        { order_custom_field_id: 1852 }
      ],
      address_city: Recipient.City,
      address_state_id: Recipient.CountryStateCode,
      address_country_id: Recipient.CountryCode,
      address_zip: Recipient.PostalCode,
      tracking_number: pkg.PreAssignTrackingNumber.TrackingNumber
    }
  }));

  return {
    "lam.asyncExecute": packagePayloads
  };
}
```

> In this example we map an array of packages to the `asyncExecute` keyword. Laminar will then invoke workflow 39 with each individual payload in parallel.


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