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Video - Leveraging structured concurrency in your applications - Franz Busch
media_link: https://www.youtube.com/watch?v=JmrnE7HUaDEProblems with unstructured concurrency
- Structured tasks:
- Cancelled Automatically
- Examples:
- group tasks:
withTaskGroupandgroup.add async-lettasks
- group tasks:
- Unstructured tasks:
- Must be cancelled manually
- Should be avoided
- Examples:
Task { }Task.detached { }
Avoiding unstructured concurrency
swift-service-lifecycle package
- Instead of: 04:09
- Use structured concurrency: 04:15
- swift-service-lifecycle 2.0: 04:34
- Service Lifecycle is a Swift package designed to help server applications, also known as services, manage their startup and shutdown sequences.
- adds graceful shutdown.
- built-in support for UNIX signals: 06:16
- Kubernetes sends a SIGTERM command to tell a service to fail gracefully.
- If it doesn't fail gracefully, Kubernetes will send a SIGKILL and force the service to shutdown.
- Kubernetes sends a SIGTERM command to tell a service to fail gracefully.
- with-Style methods10:16:
- Common throughout the swift ecosystem:
- e.g. withTaskGroup()
- when to use with-style methods: 11:45
- provide scoped access to a resource
- This pattern forces safe cleanup after using the resource:
Composing it all together
Conclusion
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Video - Leveraging structured concurrency in your applications - Franz Busch
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On this page
Problems with unstructured concurrency
Avoiding unstructured concurrency
swift-service-lifecycle package
Composing it all together
Conclusion