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streaming.js
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streaming.js
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/******************************************************************************
*
* Copyright (c) 2017, the Perspective Authors.
*
* This file is part of the Perspective library, distributed under the terms of
* the Apache License 2.0. The full license can be found in the LICENSE file.
*
*/
var SECURITIES = ["AAPL.N", "AMZN.N", "QQQ.N", "NVDA.N", "TSLA.N", "FB.N", "MSFT.N", "TLT.N", "XIV.N", "YY.N", "CSCO.N", "GOOGL.N", "PCLN.N"];
var CLIENTS = ["Homer", "Marge", "Bart", "Lisa", "Maggie", "Moe", "Lenny", "Carl", "Krusty"];
function newRows() {
var rows = [];
for (var x = 0; x < 100; x++) {
rows.push({
name: SECURITIES[Math.floor(Math.random() * SECURITIES.length)],
client: CLIENTS[Math.floor(Math.random() * CLIENTS.length)],
lastUpdate: new Date(),
date: new Date(),
chg: Math.random() * 20 - 10,
bid: Math.random() * 10 + 90,
ask: Math.random() * 10 + 100,
vol: Math.random() * 10 + 100
});
}
return rows;
}
window.addEventListener("WebComponentsReady", function() {
var elem = document.getElementsByTagName("perspective-viewer")[0];
// eslint-disable-next-line no-undef
var table = perspective.worker().table(
{
name: "string",
client: "string",
date: "date",
lastUpdate: "datetime",
chg: "float",
bid: "float",
ask: "float",
vol: "float"
},
{
limit: 5000
}
);
elem.load(table);
(function postRow() {
elem.update(newRows());
setTimeout(postRow, 50);
})();
});