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Updated production

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26
packages/production/CHANGELOG.md
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@ -1,18 +1,32 @@
# 3.0.1
# Change Log
## 3.0.2
* Fixed NNBD issues
* Updated references to `angel3` framework
* Updated README
## 3.0.1
* Fixed static analysis warnings
# 3.0.0
## 3.0.0
* Migrated to support Dart SDK 2.12.x NNBD
# 2.0.0
## 2.0.0
* Migrated to work with Dart SDK 2.12.x Non NNBD
# 1.0.0
## 1.0.0
* Support SSL/HTTP2.
* Support muting the logger via `--quiet`.
# 1.0.0-alpha.1
## 1.0.0-alpha.1
* Import `framework/http`.
# 1.0.0-alpha
## 1.0.0-alpha
* Initial version.

51
packages/production/README.md
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@ -1,24 +1,24 @@
# angel3_production
[![version](https://img.shields.io/badge/pub-v3.0.1-brightgreen)](https://pub.dartlang.org/packages/angel3_production)
# Angel3 Production Runner
[![version](https://img.shields.io/badge/pub-v3.0.2-brightgreen)](https://pub.dartlang.org/packages/angel3_production)
[![Null Safety](https://img.shields.io/badge/null-safety-brightgreen)](https://dart.dev/null-safety)
[![Gitter](https://img.shields.io/gitter/room/angel_dart/discussion)](https://gitter.im/angel_dart/discussion)
[![License](https://img.shields.io/github/license/dukefirehawk/angel)](https://github.com/dukefirehawk/angel/tree/angel3/packages/production/LICENSE)
Helpers for concurrency, message-passing, rotating loggers, and other production functionality in Angel.
Helpers for concurrency, message-passing, rotating loggers, and other production functionality in Angel3 framework.
![Screenshot](screenshot.png)
![Screenshot](angel3-screenshot.png)
This will become the de-facto way to run Angel applications in deployed environments, as it
takes care of inter-isolate communication, respawning dead processes, and other housekeeping for you automatically.
This will become the de-facto way to run Angel3 applications in deployed environments, as it takes care of inter-isolate communication, respawning dead processes, and other housekeeping for you automatically.
Most users will want to use the `Runner` class.
## `Runner`
`Runner` is a utility, powered by `package:args`, that is intended to be the entry point of your application.
Instantiate it as follows, and your file will become a command-line executable that spawns multiple instances of your
application:
Instantiate it as follows, and your file will become a command-line executable that spawns multiple instances of your application:
```dart
import 'dart:async';
@ -39,21 +39,18 @@ Future configureServer(Angel app) async {
}
```
`Runner` will automatically re-spawn crashed instances, unless `--no-respawn` is passed. This can prevent
your server from entirely going down at the first error, and adds a layer of fault tolerance to your
infrastructure.
`Runner` will automatically re-spawn crashed instances, unless `--no-respawn` is passed. This can prevent your server from entirely going down at the first error, and adds a layer of fault tolerance to your infrastructure.
When combined with `systemd`, deploying Angel applications on Linux can be very simple.
When combined with `systemd`, deploying Angel3 applications on Linux can be very simple.
## Message Passing
The `Runner` class uses [`package:angel3_pub_sub`](https://github.com/dukefirehawk/angel/tree/angel3/packages/pub_sub) to coordinate
message passing between isolates.
When one isolate sends a message, all other isolates will
receive the same message, except for the isolate that sent it.
When one isolate sends a message, all other isolates will receive the same message, except for the isolate that sent it.
It is injected into your application's `Container` as
`pub_sub.Client`, so you can use it as follows:
It is injected into your application's `Container` as `pub_sub.Client`, so you can use it as follows:
```dart
// Use the injected `pub_sub.Client` to send messages.
@ -71,9 +68,8 @@ onGreetingChanged
```
## Run-time Metadata
At run-time, you may want to know information about the currently-running instance,
for example, which number instance. For this, the `InstanceInfo` class is injected
into each instance:
At run-time, you may want to know information about the currently-running instance, for example, which number instance. For this, the `InstanceInfo` class is injected into each instance:
```dart
var instanceInfo = app.container.make<InstanceInfo>();
@ -81,19 +77,20 @@ print('This is instance #${instanceInfo.id}');
```
## Command-line Options
The `Runner` class supplies options like the following:
```
Prod-MacBook-Air:production appuser$ dart example/main.dart --help
____________ ________________________
___ |__ | / /_ ____/__ ____/__ /
__ /| |_ |/ /_ / __ __ __/ __ /
_ ___ | /| / / /_/ / _ /___ _ /___
/_/ |_/_/ |_/ ____/ /_____/ /_____/
```bash
appuser$ dart example/main.dart --help
_ _ _ ____ _____ _ _____
/ \ | \ | |/ ___| ____| | |___ /
/ _ \ | \| | | _| _| | | |_ \
/ ___ \| |\ | |_| | |___| |___ ___) |
/_/ \_\_| \_|\____|_____|_____|____/
A batteries-included, full-featured, full-stack framework in Dart.
https://angel-dart.github.io
https://angel3-framework.web.app
Options:
-h, --help Print this help information.

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12
packages/production/example/main.dart
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@ -8,15 +8,15 @@ void main(List<String> args) => Runner('example', configureServer).run(args);
Future configureServer(Angel app) async {
// Use the injected `pub_sub.Client` to send messages.
var client = app.container!.make<pub_sub.Client>()!;
String? greeting = 'Hello! This is the default greeting.';
var client = app.container?.make<pub_sub.Client>();
var greeting = 'Hello! This is the default greeting.';
// We can listen for an event to perform some behavior.
//
// Here, we use message passing to synchronize some common state.
var onGreetingChanged = await client.subscribe('greeting_changed');
var onGreetingChanged = await client?.subscribe('greeting_changed');
onGreetingChanged
.cast<String>()
?.cast<String>()
.listen((newGreeting) => greeting = newGreeting);
// Add some routes...
@ -32,8 +32,8 @@ Future configureServer(Angel app) async {
// This route will push a new value for `greeting`.
app.get('/change_greeting/:newGreeting', (req, res) {
greeting = req.params['newGreeting'] as String?;
client.publish('greeting_changed', greeting);
greeting = (req.params['newGreeting'] as String? ?? '');
client?.publish('greeting_changed', greeting);
return 'Changed greeting -> $greeting';
});

27
packages/production/lib/src/runner.dart
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@ -26,7 +26,26 @@ class Runner {
Runner(this.name, this.configureServer,
{this.reflector = const EmptyReflector()});
static const String asciiArt2 = '''
___ _ ________________ _____
/ | / | / / ____/ ____/ / |__ /
/ /| | / |/ / / __/ __/ / / /_ <
/ ___ |/ /| / /_/ / /___/ /______/ /
/_/ |_/_/ |_/\\____/_____/_____/____/
''';
static const String asciiArt = '''
_ _ _ ____ _____ _ _____
/ \\ | \\ | |/ ___| ____| | |___ /
/ _ \\ | \\| | | _| _| | | |_ \\
/ ___ \\| |\\ | |_| | |___| |___ ___) |
/_/ \\_\\_| \\_|\\____|_____|_____|____/
''';
static const String asciiArtOld = '''
____________ ________________________
___ |__ | / /_ ____/__ ____/__ /
__ /| |_ |/ /_ / __ __ __/ __ /
@ -139,7 +158,7 @@ _ ___ | /| / / /_/ / _ /___ _ /___
/// Starts a number of isolates, running identical instances of an Angel application.
Future run(List<String> args) async {
late pub_sub.Server server;
pub_sub.Server? server;
try {
var argResults = RunnerOptions.argParser.parse(args);
@ -153,11 +172,11 @@ _ ___ | /| / / /_/ / _ /___ _ /___
}
}
print(darkGray.wrap(asciiArt.trim() +
print(darkGray.wrap(asciiArt +
'\n\n' +
'A batteries-included, full-featured, full-stack framework in Dart.' +
'\n\n' +
'https://angel-dart.github.io\n'));
'https://angel3-framework.web.app\n'));
if (argResults['help'] == true) {
stdout..writeln('Options:')..writeln(RunnerOptions.argParser.usage);
@ -191,7 +210,7 @@ _ ___ | /| / / /_/ / _ /___ _ /___
..writeln(red.wrap(st.toString()));
exitCode = 1;
} finally {
await server.close();
await server?.close();
}
}

7
packages/production/pubspec.yaml
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@ -1,7 +1,8 @@
name: angel3_production
version: 3.0.1
description: Helpers for concurrency, message-passing, rotating loggers, and other production functionality in Angel.
homepage: https://github.com/dukefirehawk/angel/tree/angel3/packages/production
version: 3.0.2
description: Helpers for concurrency, message-passing, rotating loggers, and other production functionality in Angel3.
homepage: https://angel3-framework.web.app
repository: https://github.com/dukefirehawk/angel/tree/angel3/packages/production
environment:
sdk: '>=2.12.0 <3.0.0'
dependencies: