如何使用 ORMLite 实现对象缓存
我正在使用 ORMLite，想知道是否有办法实现缓存，以防止多次查询同一对象。 例如，当它被注释为“foreign = true”和“foreignAutoRefresh = true”时，
问题不是关于“如何创建缓存”，而是“如何让 ORMLite 在 WeakHashMap 中查找对象并查询如果在数据库中找不到它，则在数据库中”
I'm using ORMLite and wanted to know if there is a way to implement a cache in order to prevent querying multiple times for the same object.
For example when it is annotated as "foreign = true" and "foreignAutoRefresh = true"
The question is not about "how to make a cache" but "how can I make ORMLite look for an object in, say, a WeakHashMap and query for it in the DB if it is not found there"
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我已经在 Android 上使用 ORMLite 一段时间了，如果不是原生内置的，我建议您不要使用这样的缓存。甚至 Hibernate 的缓存有时也会对你耍一些花招，而且他们确实投入了多年的努力。
我宁愿在 DAO 或其他东西中构建一个小型缓存（例如，如此处所述），无论如何，这都会给你更多的控制权（对我来说效果很好）。顺便说一句，ORMLite 的主要贡献者甚至考虑删除“foreignAutoRefresh”，因为更新问题。
I have been using ORMLite for Android for a while now, and I would advise you against such a cache, if not natively built-in. Even Hibernate's cache does play some tricks on you sometimes, and they literally put years of effort into it.
I would rather build a mini-cache in a DAO or something (e.g., as described here), which gives you more control anyway (works pretty well for me). BTW, ORMLite's main contributor even considered to remove "foreignAutoRefresh" because of update-issues.
仅供参考，我们在 4.26 版本中向 ORMLite 原生添加了一个对象缓存。它默认支持
WeakReference和SoftReference缓存，并且可能包含一个简单的 LRU 缓存。然而，缓存相当“精简”，与 ORMLite 的名称一致。 @Manmal 确实是对的，他提到了 Hibernate 缓存的局限性以及如果你不小心的话它会如何欺骗你。
我认为这将是一项正在进行的工作，我们将来可能会启动一个带有一些更复杂缓存的
ormlite-cache包。Just FYI but we have added an object cache to ORMLite native in version 4.26. It supports a
WeakReferenceandSoftReferencecaches by default and may includes a simple LRU cache.The cache is pretty "lite" however, in keeping with ORMLite's name. @Manmal is certainly right when he mentions the limitations of Hibernate's cache and how it can trick you if you are not careful.
I assume that this will be a work in progress and we may start an
ormlite-cachepackage with some more complicated caches in the future.