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Merged
merged 4 commits into from
Sep 27, 2024
Merged

[jnigen] Implement void interface methods as listeners #1596

merged 4 commits into from
Sep 27, 2024

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HosseinYousefi
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@HosseinYousefi HosseinYousefi commented Sep 24, 2024 •
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Closes #1568.

Added a boolean <method name>$async for each given void method in an interface that defaults to false. If set to true, it will treat the method as a listener.

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coveralls commented Sep 24, 2024 •
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Coverage Status

coverage: 90.862% (-0.02%) from 90.886%
when pulling bffea4e on implement-as-listener
into 117cc75 on main.

liamappelbe
liamappelbe reviewed Sep 25, 2024
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LGTM, but let's see if there's any more discussion on the bug before you land this. Drastically changing the behavior of the method based on the return type of the function like this might be too much black-box magic. Given how much type inference Dart does, I wonder if users might get unexpected behavior where a method they expect to block turns into a listener.

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Drastically changing the behavior of the method based on the return type of the function like this might be too much black-box magic.

+1 on this.

@HosseinYousefi HosseinYousefi mentioned this pull request Sep 25, 2024
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Ended up using booleans. Adding more types of callback like temporary isolate will require a breaking change anyways as in that case I prefer JCallable.xyz constructors instead of enum-like values as they're no longer limited to void returning methods and they might require special lints (maybe using a pragma) to warn users against certain patterns due to the limitations of temporary isolate mode.

PTAL @liamappelbe @dcharkes

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My 2 cents on the API. I'll let @liamappelbe review the PR as a whole.

pkgs/jnigen/docs/interface_implementation.md
// Dart
final runnable = Runnable.implement($Runnable(
run: () => print('hello'),
run$async: true, // This makes the run method non-blocking.
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nit: blocking: false (that would make the comment unneeded)

pkgs/jnigen/test/simple_package_test/runtime_test_registrant.dart
if (style == 'callback') {
runnable = MyRunnable.implement($MyRunnable(
run: completer.complete,
run$async: true,
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blocking: false

Maybe only generate $blocking as a variable name if blocking is a member already taken.

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It's per method, so it's going to be run$blocking. The quip with blocking is that the default is true, I prefer boolean defaults to be false instead.

@HosseinYousefi HosseinYousefi enabled auto-merge (squash) September 26, 2024 19:44
@HosseinYousefi HosseinYousefi merged commit 16918ae into main Sep 27, 2024
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@HosseinYousefi HosseinYousefi deleted the implement-as-listener branch September 27, 2024 02:20
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[jnigen] Enable "listener" callbacks
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