Dashboard should request log streams only when the user gestures to display them #3235
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…rs to not see what was already written. Fix duplicate logs issue by clearing out the backlog when the last subscriber leaves.
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What happens to historical logs? For example, will requesting the console logs for an app show all longs since the app started? (if less than the limit) |
…snap shotted after subscribing to the log. Fix existing tests for new functionality and add an additional test.
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The "backlog" gets cleared after the last subscriber to a resource leaves. Later, when a "new" subscriber comes along, they are all replayed from DCP because we call So even if no one was subscribed for a while, the whole logs come back once someone does. |
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One small race is that starting logs before the container is ready, it won’t show up. Super tight race and I don’t know if it’ll be worth complicating the code but I thought I’d let you know |
davidfowl
reviewed
Mar 28, 2024
Only clear the backlog on containers and executables.
Can you describe this a bit more? When what is starting the logs before the container is ready? |
Move lock out of async iterator.
- Remove count and instead check if the delegate is null to indicate whether there are subscribers or not. - Remove the separate IAsyncEnumerable classes and just use `async IAsyncEnumerable` methods.
Employ a 2nd loop that listens for both "has subscribers" and "logs available".
This didn't turn out to be too bad. I added another loop that joined the "has subscribers" and "logs available" information, and only starts the logs once both are true. |
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davidfowl
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Mar 30, 2024
davidfowl
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Mar 30, 2024
davidfowl
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Mar 30, 2024
- Set SingleReader=true on the logInformationChannel. - Add comment and assert that LogsAvailable can only turn true and can't go back to false.
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…isplay them (dotnet#3235) Change the AppHost to only subscribe to DCP's logs when there is a subscriber for the logs. Fix dotnet#2789 * Show logs * Remove the "StreamingLogger" because that causes subsequent subscribers to not see what was already written. Fix duplicate logs issue by clearing out the backlog when the last subscriber leaves. * Fix a concurrency issue with the backlog. Ensure the backlog is only snap shotted after subscribing to the log. Fix existing tests for new functionality and add an additional test. * PR feedback Only clear the backlog on containers and executables. * PR feedback. Move lock out of async iterator. * Clean up code. - Remove count and instead check if the delegate is null to indicate whether there are subscribers or not. - Remove the separate IAsyncEnumerable classes and just use `async IAsyncEnumerable` methods. * Fix a race at startup when logs aren't available. Employ a 2nd loop that listens for both "has subscribers" and "logs available". * Simplify ResourceNotificationService.WatchAsync. * Fix test build * Address PR feedback - Set SingleReader=true on the logInformationChannel. - Add comment and assert that LogsAvailable can only turn true and can't go back to false. --------- Co-authored-by: David Fowler <davidfowl@gmail.com>
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Apr 3, 2024
…isplay them (dotnet#3235) Change the AppHost to only subscribe to DCP's logs when there is a subscriber for the logs. Fix dotnet#2789 * Show logs * Remove the "StreamingLogger" because that causes subsequent subscribers to not see what was already written. Fix duplicate logs issue by clearing out the backlog when the last subscriber leaves. * Fix a concurrency issue with the backlog. Ensure the backlog is only snap shotted after subscribing to the log. Fix existing tests for new functionality and add an additional test. * PR feedback Only clear the backlog on containers and executables. * PR feedback. Move lock out of async iterator. * Clean up code. - Remove count and instead check if the delegate is null to indicate whether there are subscribers or not. - Remove the separate IAsyncEnumerable classes and just use `async IAsyncEnumerable` methods. * Fix a race at startup when logs aren't available. Employ a 2nd loop that listens for both "has subscribers" and "logs available". * Simplify ResourceNotificationService.WatchAsync. * Fix test build * Address PR feedback - Set SingleReader=true on the logInformationChannel. - Add comment and assert that LogsAvailable can only turn true and can't go back to false. --------- Co-authored-by: David Fowler <davidfowl@gmail.com>
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Apr 4, 2024
…isplay them (#3235) (#3343) Change the AppHost to only subscribe to DCP's logs when there is a subscriber for the logs. Fix #2789 * Show logs * Remove the "StreamingLogger" because that causes subsequent subscribers to not see what was already written. Fix duplicate logs issue by clearing out the backlog when the last subscriber leaves. * Fix a concurrency issue with the backlog. Ensure the backlog is only snap shotted after subscribing to the log. Fix existing tests for new functionality and add an additional test. * PR feedback Only clear the backlog on containers and executables. * PR feedback. Move lock out of async iterator. * Clean up code. - Remove count and instead check if the delegate is null to indicate whether there are subscribers or not. - Remove the separate IAsyncEnumerable classes and just use `async IAsyncEnumerable` methods. * Fix a race at startup when logs aren't available. Employ a 2nd loop that listens for both "has subscribers" and "logs available". * Simplify ResourceNotificationService.WatchAsync. * Fix test build * Address PR feedback - Set SingleReader=true on the logInformationChannel. - Add comment and assert that LogsAvailable can only turn true and can't go back to false. --------- Co-authored-by: David Fowler <davidfowl@gmail.com>
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Change the AppHost to only subscribe to DCP's logs when there is a subscriber for the logs.
Fix #2789
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