Create Virtual Pressure Source

The Create Virtual Pressure Source command of the WebDriver API creates a virtual pressure source of a given type, which overrides the platform pressure source of the same type. This lets tests exercise the Compute Pressure API with predetermined pressure states instead of relying on real hardware.

Syntax

Method	URI template
`POST`	`/session/{session id}/pressuresource`

URL parameters

session id: Identifier of the session.

Payload

The input is an object:

type: A string identifying the pressure source type to create. Currently, the only widely supported value is "cpu".
supported Optional: A boolean indicating whether the virtual pressure source is able to provide samples. Defaults to true.

Return value

null if successful.

Errors

invalid session id: Session does not exist.
invalid argument: The type is not a supported pressure source type, or a virtual pressure source of that type already exists.

Examples

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Creating a virtual pressure source

With a WebDriver server running on localhost:4444, assume an active session has been created. To create a virtual "cpu" pressure source, send its type in the request payload, replacing ID with the sessionId from the New Session response:

bash

curl -i -H "Content-Type: application/json" \
  -d '{"type": "cpu"}' \
  http://localhost:4444/session/ID/pressuresource

The server responds with a null value to indicate success:

http

HTTP/1.1 200 OK
content-type: application/json; charset=utf-8

{"value":null}

Specifications

Compute Pressure Level 1