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Using Plug-ins
Using Plug-ins
Angel is designed to be extensible. As such, it exposes a typedef,
AngelConfigurer, that has special privileges within the framework - they act as plug-ins and can be called via app.configure().Plug-ins simply need to accept an
Angel instance as a parameter, and return a Future (the result of which will be ignored, unless it throws an error). Angel instances have several facilities available to be customized, and thus it is easy to use a custom plug-in to bring about desired functionality within your application.1
typedef Future AngelConfigurer(Angel app);
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As a convention, Angel plug-ins should be hooked up before the call to
startServer.1
import 'dart:io';
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import 'package:angel_framework/angel_framework';
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​
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plugin(Angel app) async {
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print("Do stuff here");
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}
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​
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main() async {
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Angel app = new Angel();
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await app.configure(plugin);
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await app.startServer();
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}
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Execution Order
Plugins are usually immediately invoked by
app.configure(). However, you may run into certain plug-ins that depend on other facilities already being available, or all of your services already being mounted. You can set aside a plug-in to be run just before server startupby adding it to app.startupHooks, instead of directly calling app.configure().1
app.startupHooks.addAll([
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myPlugin(),
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AngelWebSocket().configureServer,
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fooBarBazQuux()
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]);
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Likewise, you can add hooks that run just before the app is shutdown, via
Angel.shutdownHooks.Next Up...
Last modified 3yr ago
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