Inline Task

json

"type": "INLINE"

The Inline task (INLINE) executes lightweight scripting logic inside the Conductor server JVM and immediately returns a result that can be wired into downstream tasks.

The Inline task is best for small, deterministic logic like simple validation or calculation. For heavy, custom logic, it is best to use a Worker task (SIMPLE) instead.

Task parameters

Use these parameters inside inputParameters in the Inline task configuration.

Parameter	Type	Description	Required / Optional
evaluatorType	String	The type of evaluator used. Supported types: `javascript`	Required.
expression	String	The expression to be evaluated by the evaluator. The expression must return a value.

The JavaScript evaluator accepts code written to the ECMAScript 5.1(ES5) standard.

Note: To use ES6 instead, set the environment variable CONDUCTOR_NASHORN_ES6_ENABLED to true. | Required. | | inputParameters | Map[String, Any] | Any other input parameters for the Inline task. You can include any other input values required for evaluation here, which can be referenced in expression as $.value. | Optional. |

JSON configuration

Here is the task configuration for an Inline task.

json

{
  "name": "inline",
  "taskReferenceName": "inline_ref",
  "type": "INLINE",
  "inputParameters": {
    "evaluatorType": "javascript",
    "expression": "(function(){ return $.input1 + $.input2; })()",
    "input1": 1,
    "input2": 2
  }
}

Output

The Inline task will return the following parameters.

Name	Type	Description
result	Map	Contains the output returned by the evaluator based on the `expression`.

Examples

Here are some examples for using the Inline task.

Simple example

json

{
  "name": "INLINE_TASK",
  "taskReferenceName": "inline_test",
  "type": "INLINE",
  "inputParameters": {
      "inlineValue": "${workflow.input.inlineValue}",
      "evaluatorType": "javascript",
      "expression": "function scriptFun(){if ($.inlineValue == 1){ return {testvalue: true} } else { return
      {testvalue: false} }} scriptFun();"
  }
}

The Inline task output can then be referenced in downstream tasks using the expression "${inline_test.output.result.testvalue}".

Formatting data

In this example, the Inline task is used to ensure that downstream tasks only receive weather data in Celcius.

json

{
  "name": "INLINE_TASK",
  "taskReferenceName": "inline_test",
  "type": "INLINE",
  "inputParameters": {
      "scale": "${workflow.input.tempScale}",
	    "temperature": "${workflow.input.temperature}",
      "evaluatorType": "javascript",
      "expression": "function SIvaluesOnly(){if ($.scale === "F"){ centigrade = ($.temperature -32)*5/9; return {temperature: centigrade} } else { return 
      {temperature: $.temperature} }} SIvaluesOnly();"
  }
}