Actions

Adding fixed input values to an Action

This example builds upon the previous “hello world” example and shows how fixed values can be supplied to the input parameters of an Action.

It shows how to:

• declare input parameters on the action ‘hello_world’ using a single-line grammar.
• add ‘name’ and ‘place’ as input parameters with the fixed values “Sam” and “the Shire” respectively.

Manifest File

Example: “Hello world” with fixed input values for ‘name’ and ‘place’

packages:
  hello_world_package:
    version: 1.0
    license: Apache-2.0
    actions:
      hello_world_fixed_parms:
        function: src/hello.js
        inputs:
          name: Sam
          place: the Shire

Deploying

$ wskdeploy -m docs/examples/manifest_hello_world_fixed_parms.yaml

Invoking

$ wsk action invoke hello_world_package/hello_world_fixed_parms --blocking

Result

The invocation should return an 'ok' with a response that includes this result:

"result": {
    "greeting": "Hello, Sam from the Shire"
},

Discussion

In this example:

• The value for the ‘name’ input parameter would be set to “Sam”.
• The value for the ‘place’ input parameter would be set to “the Shire”.
• The wskdeploy utility would infer that both ‘name’ and ‘place’ input parameters to be of type ‘string’.

Source code

The manifest file for this example can be found here:

• manifest_hello_world_fixed_parms.yaml
• hello.js

Specification

For convenience, the Actions and Parameters grammar can be found here:

• Actions
• Parameters

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