This sample demonstrates how MQ Light can make apps more responsive using worker threads.
The sample contains three directories each of which is a node.js project.
webapp-noworker.nodejs is a stand alone node.js application which fetches tweets from twitter and analyses them in a single threaded application.
webapp-offload.nodejs and worker.nodejs are the worker thread enabled version of the application. webapp-offload.nodejs is the web backend and this hands off work to one or more instances of worker.nodejs.
Follow the instructions in our Getting started
page to install and start MQ Light. Then download and extract this sample and
add Twitter OAuth keys (follow these instructions
to get them) to twitterkey.json. found in webapp-noworker.nodejs and
webapp-offload.nodejs.
Next, cd into each directory in turn and run
npm install
to install the required modules.
To run the single threaded version run
node webapp-noworker.nodejs/app.js
The app can be viewed at http://localhost:3000/. Note that the analytics processing causes the tweet stream to be slow.
Once you have observed the single threaded application, stop it and then run
node worker.nodejs/worker.js
to start the worker thread and
node webapp-offload.nodejs/app.js
to start the web backend app. The app can be viewed at http://localhost:3000/. The tweet stream should be much more responsive than the single threaded example because the cpu heavy work is being handled by a separate worker thread.