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embedded-juttle

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embedded-juttle

Run some juttle on some data...right in your browser.

0.1.0
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Embedded Juttle

Build Status

Run some Juttle on some data...right in your browser.

Installation

$ npm install embedded-juttle

Example

<html>
    <head>
        <script type="text/javascript" src="node_modules/embedded-juttle/dist/embedded-juttle.min.js"></script>
    <head>
    <body>
        <script type="text/javascript">
            'use strict';
            const points = [
                {
                    time: new Date(1000),
                    v: 1
                },
                {
                    time: new Date(2000),
                    v: 2
                }
            ];

            let juttle = new EmbeddedJuttle('put v2 = v | view table');

            juttle.run({
                wait: true,
                points: points
            }).then((result) => {
                console.log(JSON.stringify(result, null, 2));
            })
            .catch((err) => {
                console.log("got an error trying to do runBatch: " + err);
            });
        </script>
    </body>
</html>

prints

{
  "output": {
    "view0": {
      "type": "table",
      "options": {},
      "data": [
        {
          "type": "point",
          "point": {
            "time": "1970-01-01T00:00:01.000Z",
            "v": 1,
            "v2": 1
          }
        },
        {
          "type": "point",
          "point": {
            "time": "1970-01-01T00:00:02.000Z",
            "v": 2,
            "v2": 2
          }
        }
      ]
    }
  },
  "warnings": [],
  "errors": []
}

API

let juttle = new EmbeddedJuttle(juttle)

Instantiate a new EmbeddedJuttle with the Juttle code. Unlike Juttle code you would send to the juttle-engine or the CLI, the juttle code here should not start with a source and instead should start with the a processor.

juttle.run([options])

Runs the juttle. Returns a promise.

Options:

  • wait (defaults to false): If false, the returned promise is resolved as soon as the program is activated and is ready to start receiving points. If true, the returned promise is resolved when the program has completed. The resolved value contains the descriptions and points for each view in your juttle and any errors and/or warnings that occurred during execution.
  • points: When using { wait: true }, specify the data to run the juttle on here.

juttle.sendPoints(points)

Send points into the juttle flowgraph. Use this when run() with { wait: false }. Can be called multiple times.

juttle.stop()

Lets juttle know that you will not be sending any more points. juttle will emit an end event once all the points have gone through the flowgraph. Used when run() with { wait: false }.

juttle.on(eventName, fn)

Subscribe to events. Used when run() with { wait: false }.

Events:

  • "view:points": Emitted when points arrive at one of the views in the juttle program.
  • "view:mark": Emitted when a mark arrives at one of the views in the juttle program.
  • "view:tick": Emitted when a tick arrives at one of the views in the juttle program.
  • "end": Emitted when a program has completed and will not emit any more points.

juttle.getViews()

Get the views found in the juttle program. Should be called after run().

FAQs

Package last updated on 05 Feb 2016

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