2016-11-15 11:57:35 +00:00
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# Realm-JS Interprocess Example
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2016-11-15 21:49:22 +00:00
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Example of interprocess support using Realm and Node.js
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2016-11-15 11:57:35 +00:00
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The example makes use of [Winston](https://github.com/winstonjs/winston), a
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logging library, and includes `winston-realm.js` which defines a custom transport
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2016-11-15 21:49:22 +00:00
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utilizing Realm for storage. The main file, `index.js` is an
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[Express](https://github.com/expressjs/express) app handling HTTP requests. The
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app listens on port 3000 and responds with "Hello World!" at the base path `/`
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and logs at `info` "Handled Hello World" to Winston. At any other path it
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returns a `404` error and logs an error message to Winston with URL in question.
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2016-11-15 11:57:35 +00:00
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Since the log messages are being stored in a Realm (`winston.realm`), we can
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listen for changes on another process. The `listener.js` is a small example of
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this. When running, this listens to the `winston.realm` for changes and writes
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to the console the latest error level log message.
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To test:
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1. `npm install`
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2. `node .` to run the Express app
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3. In another process: `node listener.js`
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4. Go to `http://localhost:3000/whatever` to see error message across processes
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