10000 Add guides about barriers with a fan out and termination by trevorturk · Pull Request #205 · socketry/async · GitHub
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Dec 5, 2022
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Add guides about barriers with a fan out and termination #205

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Add guides about barriers with a fan out and termination
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@trevorturk
trevorturk committed Dec 5, 2022
commit 0df552cc9e9827966872e65b59ad076293550c8b
40 changes: 40 additions & 0 deletions guides/asynchronous-tasks/readme.md
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Expand Up @@ -200,6 +200,46 @@ Async do
end
```

### Stopping all Tasks held in a Barrier

To stop (terminate/cancel) the all tasks held in a barrier:

```ruby
barrier = Async::Barrier.new

Async do
tasks = 3.times.map do |i|
barrier.async do
sleep 1
puts "Hello World #{i}"
end
end

barrier.stop
end
```

If you're letting individual tasks held by a barrier throw unhandled exceptions, be sure to call ({ruby Async::Barrier#stop}):

```ruby
barrier = Async::Barrier.new

Async do
tasks = 3.times.map do |i|
barrier.async do
sleep 1
puts "Hello World #{i}"
end
end

begin
barrier.wait
ensure
barrier.stop
end
end
```

## Resource Management

In order to ensure your resources are cleaned up correctly, make sure you wrap resources appropriately, e.g.:
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