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Class: CacheEntry

new CacheEntry (cache, key, item)

画像・音声のデータを確保しておくクラス。バージョン 1.3.4 で追加された。

TTL とは time to live の略で、ガベッジコレクション(データの破棄)されるまでの生存時間のこと。

関連クラス: Bitmap, HTML5Audio, WebAudio

Parameters:

Name Type Description
cache CacheMap キャッシュマップ
key String データ指定するキー(ファイルのURL)
item String 保持しているデータの種類(‘Bitmap’, ‘HTML5Audio’, ‘WebAudio’)

Properties:

Name Type Description
cache CacheMap キャッシュマップ
cached Boolean キャッシュされているか
freedByTTL Boolean TTLで解放するか
key String データ指定するキー(ファイルのURL)
item String 保持しているデータの種類 (‘Bitmap’, ‘HTML5Audio’, ‘WebAudio’)
touchSeconds Number touch 時間
touchTicks Number touch 時間
ttlSeconds Number TTL (0: 設定なし)
ttlTicks Number TTL (0: 設定なし)

Methods

allocate () → {CacheEntry}

リソースを割り当てて、自身を返す。

free (byTTL opt)

割り当てたリソースを解放。

Parameters:
Name Type Attributes Description
byTTL Boolean <optional> TTLか

isStillAlive () → {Boolean}

生存しているか。

setTimeToLive (ticks opt, seconds opt) → {CacheEntry}

TTLを設定し、自身を返す。

Parameters:
Name Type Attributes Description
ticks Number <optional> TTL 0: 即時
seconds Number <optional> TTL 0: 即時

touch ()

解放されていたらキャッシュマップに再追加するなど、キャッシュの延命。

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