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lightstreamer-jms-web-client

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lightstreamer-jms-web-client

JavaScript library for the development of Lightstreamer JMS Extender clients running inside the web browser

2.0.0
Source
npm

Version published: 5 years ago

Weekly downloads: 5; increased by150%

Maintainers: 1

Weekly downloads

Created: 5 years ago

Source

Lightstreamer JMS Extender Web Client

Overview

The Lightstreamer JMS Extender Web Client enables any JavaScript application running inside the web browser to act as a JMS client, that is, ready to connect to a JMS broker via Lightstreamer JMS Extender.

The library is designed to be as class-by-class and method-by-method equivalent to JMS API 2.0 as possible.

Installation

npm

The library is available as npm package, so you can download and install it through:

npm install lightstreamer-jms-web-client

Then load it from local node_modules:

<html>
<head>
  <script src="./node_modules/lightstreamer-jms-web-client/dist/lightstreamer-jms.js"></script>
  ...
</html>

cdn

The library is also available on unpkg, to which you can point directly in the script tag:

<script src="https://unpkg.com/lightstreamer-jms-web-client@2.0.0/dist/lightstreamer-jms.js"></script>

Development

Open a session against Lightstreamer JMS Extender, create a Topic Connection and connect to the JMS broker:

jms.TopicConnectionFactory.createTopicConnection("http://localhost:8080/", "ActiveMQ", null, null, {
  onConnectionCreated: function(conn) {
    var topicSession = conn.createSession(false, "PRE_ACK");
    .....
    conn.start();
  }
});

Create a Topic Subscription and send it to the broker:

var topic = topicSession.createTopic("stocksTopic");
var consumer = topicSession.createConsumer(topic, null);

Listen for messages:

consumer.setMessageListener({
  onMessage: function(message) {
    var feedMessage = message.getObject();
    var key = feedMessage.itemName;
    var values = feedMessage.currentValues;
    console.log(values["stock_name"] + ": " + values["last_price"]);
  }
});

Compatibility

Compatible with JMS Extender since 2.0.0.
Based on Lightstreamer SDK for Web Clients version 7.2.0 build 1779.
Compatible with code developed with the previous version.

Changelog

See detailed changes here.

Documentation

API Reference
Chapter "Client Application Development" of JMS Extender Documentation

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Package last updated on 11 May 2020

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