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Merge pull request #1141 from ardriveapp/dev
PE-4001: Release Flutter App v2.3.0
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| - Utilize cached metadata for Snapshot authoring |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| import 'dart:typed_data'; | ||
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| import 'package:ardrive/utils/logger/logger.dart'; | ||
| import 'package:stash/stash_api.dart'; | ||
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| const defaultMaxEntries = 550; | ||
| const defaultCacheName = 'metadata-cache'; | ||
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| class MetadataCache { | ||
| final Cache<Uint8List> _cache; | ||
| final int _maxEntries; | ||
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| MetadataCache(this._cache, {int maxEntries = defaultMaxEntries}) | ||
| : _maxEntries = maxEntries; | ||
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| static Future<MetadataCache> fromCacheStore( | ||
| CacheStore store, { | ||
| int maxEntries = defaultMaxEntries, | ||
| }) async { | ||
| final cache = await _newCacheFromStore(store, maxEntries: maxEntries); | ||
| return MetadataCache(cache, maxEntries: maxEntries); | ||
| } | ||
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| Future<bool> put(String key, Uint8List data) async { | ||
| if (await isFull) { | ||
| return false; | ||
| } | ||
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| // FIXME: check for quota before attempting to write to cache | ||
| try { | ||
| logger.d('Putting $key in metadata cache'); | ||
| await _cache.putIfAbsent(key, data); | ||
| } catch (e, s) { | ||
| logger.e('Failed to put $key in metadata cache', e, s); | ||
| return false; | ||
| } | ||
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| if (await isFull) { | ||
| logger.i('Metadata cache is now full and will not accept new entries'); | ||
| } | ||
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| return true; | ||
| } | ||
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| Future<Uint8List?> get(String key) async { | ||
| try { | ||
| final value = await _cache.get(key); | ||
| if (value != null) { | ||
| logger.d('Cache hit for $key in metadata cache'); | ||
| } else { | ||
| logger.d('Cache miss for $key in metadata cache'); | ||
| } | ||
| return value; | ||
| } catch (e, s) { | ||
| logger.e('Failed to get $key from metadata cache', e, s); | ||
| return null; | ||
| } | ||
| } | ||
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| Future<void> remove(String key) async { | ||
| logger.d('Removing $key from metadata cache'); | ||
| return _cache.remove(key); | ||
| } | ||
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| Future<void> clear() async { | ||
| logger.d('Clearing metadata cache'); | ||
| return _cache.clear(); | ||
| } | ||
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| Future<Iterable<String>> get keys async { | ||
| return _cache.keys; | ||
| } | ||
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| Future<bool> get isFull async { | ||
| final size = await this.size; | ||
| final isFull = size >= _maxEntries; | ||
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| return isFull; | ||
| } | ||
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| Future<int> get size async { | ||
| return _cache.size; | ||
| } | ||
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| static Future<Cache<Uint8List>> _newCacheFromStore( | ||
| CacheStore store, { | ||
| required int maxEntries, | ||
| }) async { | ||
| logger.d('Creating metadata cache with max entries: $maxEntries'); | ||
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| return store.cache<Uint8List>( | ||
| name: defaultCacheName, | ||
| maxEntries: maxEntries, | ||
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| // See: https://pub.dev/packages/stash#eviction-policies | ||
| evictionPolicy: null, | ||
| ); | ||
| } | ||
| } |
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