如何在番石榴中将ExpireAfterAccess与CacheBuilder一起使用

Question

I have the following code:
new MapMaker().expireAfterAccess(SESSION_EXPIRATION, TimeUnit.MILLISECONDS).makeMap();

In guava 10 it said it is deprecated and should be replaced by CacheBuilder . What is the new syntax for this?

Answer 1

Reading the documentation, I think you might just use the similar methods, and pass a loader which always throws an exception. You would then call asMap() to get a map, where you would be able to put your keys and values and have it backed by the cache.

Answer 2

新语法看起来像

Cache<K, V> cache = CacheBuilder.newBuilder().expireAfterAccess(SESSION_EXPIRATION, TimeUnit.MILLISECONDS).build();

Answer 3

Guava release 11.0 will feature CacheBuilder.build() :

http://docs.guava-libraries.googlecode.com/git/javadoc/com/google/common/cache/CacheBuilder.html

Until then it is unfortunately necessary to use asMap() .