This JavaScript library enables any JavaScript application running in a web browser or a Node.js container to connect to a JMS broker via JMS Extender or Lightstreamer Server with JMS Extender Adapter.
The library is designed to be as class-by-class and method-by-method equivalent to JMS API 2.0 as possible. Some differences still apply, mainly due to JavaScript asynchronous nature. Most notably, some JMS synchronous APIs, like createConnection, here require a callback and will be called asynchronously.
Following is an example of a topic connection and subscription:
jms.ConnectionFactory.createConnection("http://my.push.server:8080/", "ActiveMQ", null, null, {
onConnectionCreated: function(conn) {
conn.setExceptionListener({
onException: function(exception) {
// Handle exceptions here
}
});
var session = conn.createSession(false, "PRE_ACK");
var topic = session.createTopic("stocksTopic");
var consumer= session.createConsumer(topic, null);
consumer.setMessageListener({
onMessage: function(message) {
// Handle messages here
}
});
conn.start();
},
onConnectionFailed: function(errorCode, errorMessage) {
// Handle server errors here, e.g.:
alert("Server error: " + errorCode + " " + errorMessage);
}
});
Following is an example of a queue connection and message send:
jms.ConnectionFactory.createConnection("http://my.push.server:8080/", "ActiveMQ", null, null, {
onConnectionCreated: function(conn) {
conn.setExceptionListener({
onException: function(exception) {
// Handle exceptions here
}
});
var session = conn.createSession(false, "AUTO_ACK");
var queue = session.createQueue("stocksQueue");
var producer = session.createProducer(queue, null);
var msg = session.createTextMessage("some text");
producer.send(msg);
conn.start();
},
onConnectionFailed: function(errorCode, errorMessage) {
// Handle server errors here, e.g.:
alert("Server error: " + errorCode + " " + errorMessage);
}
});
The library is available as npm package, so you can download and install it through:
npm install lightstreamer-jms-web-client
or
npm install lightstreamer-jms-node-client
To build the library, enter the directory tools and run the command node build_web.js or the command node build_node.js. The first time you should also enter the root directory of the project and run the command npm install in order to install the dependencies required by the build scripts. The scripts require Node.js version 14 or greater.
The artifacts generated are saved in the directories tools/dist-web and tools/dist-node.
For questions and support please use the Official Forum. The issue list of this page is exclusively for bug reports and feature requests.
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