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phant-client

v1.0.1

Published

Node Phant Client

Downloads

2

Readme

iotdb-phant-client

Node Client for Phant.

Usage

To connect to data.sparkfun.com

var Phant = require('phant-client').Phant
var phant = new Phant()

To connect to your own Phant server:

var phant = new Phant({ "iri": "http://localhost:8080" })

IMPORTANT NOTE

If you are using your own Phant server, you must be running phant-manager-http. Make sure you follow the instructions in the README.md on this page:

https://github.com/sparkfun/phant-manager-http

Creating a new stream

Functions create() and connect() will callback with a streamd object which can be used to do Phant stuff. You must create() or connect() to a Phant server first: you can't just use a serialized streamd object.

phant.create({
    title: "My Awesome Stream",
    description: "The description",
    fields: "a,b,c"
}, function(error, streamd) {
    if (error) {
        console.log("+ error", error)
    } else {
        console.log(streamd)
    }
}

Connecting to an existing stream

Note that if the stream as created on a different Phant server, it will work exactly as expected. The streamd records the location of the server it connected to.

phant.connect(streamd, function(error, streamd) {
    /* do stuff */
})

Connecting to an IRI

If you have a 'streams' IRI, you can connect directly to that

var iri = 'https://data.sparkfun.com/streams/dZ4EVmE8yGCRGx5XRX1W'
phant.connect(iri, function(error, streamd) {
    /* do stuff */
})

Adding a record

phant.add(streamd, {
    a: 22
})

Phant requires that all fields be present. iotdb-phant-client cleverly defaults these to the empty string.

Retrieving the latest record

Note that this is entirely independent of the next/reset functions below.

phant.latest(streamd, function(error, rd) {
    if (error) {
        console.log("# error", error)
    } else if (rd === null) {
        console.log("+ eof")
    } else {
        console.log("+ got", rd)
    }
})

Stepping through stream

The first class to next() will get the first record and subsequent calls will step through the data. When no more data is available, null will be returned to indicate EOF. If you want to start looping through the records again from the beginning, call phant.reset(streamd). If you need to loop through records multiple times simultaneously, use phant.scrub(streamd) to return a copy of the stream object.

The sightly complicated nature of this example is because the code is callback driven.

var fetcher = function() {
    phant.next(streamd, function(error, rd) {
        if (error) {
            console.log("# error", error)
        } else if (rd === null) {
            console.log("+ eof")
        } else {
            console.log("+ got", rd)
            fetcher()
        }
    })
}

fetcher()