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@@ -0,0 +1,26 @@
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+# Custom subscribers
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+
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+You may define custom eventhandlers, `subscribers` by creating files in the `/subscribers` directory.
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+
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+```js
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+class WelcomeSubscriber {
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+ constructor({ welcomeService, eventBusService }) {
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+ this.welcomeService_ = welcomeService;
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+
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+ eventBusService.subscribe("order.placed", this.handleWelcome);
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+ }
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+
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+ handleWelcome = async (data) => {
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+ return await this.welcomeService_.sendWelcome(data.id);
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+ };
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+}
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+
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+export default WelcomeSubscriber;
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+```
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+
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+A subscriber is defined as a `class` which is registered as a subscriber by invoking `eventBusService.subscribe` in the `constructor` of the class.
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+
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+The type of event that the subscriber subscribes to is passed as the first parameter to the `eventBusService.subscribe` and the eventhandler is passed as the second parameter. The types of events a service can emmit are described in the individual service.
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+
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+An eventhandler has one paramenter; a data `object` with only an `id` field. The `id` can be used to fetch the appropriate entity in the eventhandler.
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+
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pKorsholm