tree 5387d0a7b9a03c5def5c5808d633b41d5b9b71b6
parent d61f308ff72c60e97fc3add124f6b091a4a445c7
author Eric Anderson <ejona@google.com> 1372283855 -0700
committer Eric Anderson <ejona@google.com> 1372436452 -0700

Use async reload() in CacheLoader

CacheLoaders need asynchronous refresh()s for refreshAfterWrite() to
work effectively. The Cache will call CacheLoader.refresh() when
appropriate during a get() due to refreshAfterWrite(), but if the
refresh() blocks, then that is effectively as if the element expired.
With an asynchronous reload(), the reloading starts on that get() but
users of the Cache see the old value until refresh() completes.