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HY-4957 Alert devs about batchedRedraw race condition, and log if it happens in prod. ⚠️ #72

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merged 6 commits into from
Jun 14, 2017
Merged

HY-4957 Alert devs about batchedRedraw race condition, and log if it happens in prod. ⚠️ #72

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a5d1b90
Do not subscribe to stores that are disposed or disposing. :hear_no_e…
tomconnell-wf Jun 8, 2017
05bbe8c
Just assert and log, instead. :warning:
tomconnell-wf Jun 9, 2017
7afb657
Clean up. :wind_chime:
tomconnell-wf Jun 9, 2017
6a4041b
Fix CI and CR. :heavy_check_mark:
tomconnell-wf Jun 14, 2017
cad8b21
Merge remote-tracking branch 'upstream/master' into do_not_listen_to_…
tomconnell-wf Jun 14, 2017
1c5f5a2
Make the logger static, avoid potential for memory leaks.
tomconnell-wf Jun 14, 2017
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10 changes: 10 additions & 0 deletions lib/src/component_declaration/flux_component.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@
library over_react.component_declaration.flux_component;

import 'dart:async';
import 'package:logging/logging.dart';
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Could you please add logging to pubspec.yaml?

import 'package:w_flux/w_flux.dart';
import './annotations.dart' as annotations;
import './transformer_helpers.dart';
Expand Down Expand Up @@ -82,6 +83,7 @@ abstract class FluxUiStatefulComponent<TProps extends FluxUiProps, TState extend
///
/// Private so it will only get used in this file, since having lifecycle methods in a mixin is risky.
abstract class _FluxComponentMixin<TProps extends FluxUiProps> implements BatchedRedraws {
static final Logger _logger = new Logger('_FluxComponentMixin');
TProps get props;

/// List of store subscriptions created when the component mounts.
Expand All @@ -101,6 +103,14 @@ abstract class _FluxComponentMixin<TProps extends FluxUiProps> implements Batche
value: (_) => (_) => redraw())..addAll(getStoreHandlers());

handlers.forEach((store, handler) {
String message = 'Cannot listen to a disposed/disposing Store.';
assert(!store.isDisposedOrDisposing, '$message This can be caused by BatchedRedraws '
'mounting the component asynchronously after the store has been disposed. If you are '
'in a test environment, try adding an `await window.animationFrame;` before disposing your '
'store.');

if (store.isDisposedOrDisposing) _logger.warning(message);

StreamSubscription subscription = store.listen(handler);
_subscriptions.add(subscription);
});
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1 change: 1 addition & 0 deletions pubspec.yaml
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Expand Up @@ -10,6 +10,7 @@ dependencies:
analyzer: ">=0.30.0 <0.31.0"
barback: "^0.15.0"
js: "^0.6.0"
logging: ">=0.11.3+1 <1.0.0"
meta: "^1.0.4"
path: "^1.4.1"
react: "^3.1.0"
Expand Down