Updating selfpopulatingcache example
Cache Entry Factory; import ehcache.constructs.blocking. Self Populating Cache; public class EHCache Tester I have printed the cache size. But the heap size as reported by Runtime().total Memory()Runtime()Memory() is telling me something different.
I recently had to sit down and figure out exactly how it works, and thought I’d take a moment to write it up. Because open source development is more about individuals than organisations, Wotif staff members don’t really have much to do with ehcache development. You can monitor cache hits and misses in detail by turning the logging for the up.
The other thing to keep an eye on is how much the cache has no size limit – in theory, it could fill up your entire file system, particularly if you have your objects marked as eternal (which means they will never expire). Let’s go for a simple example: I have an Order object, which contains 3 Order Items.
Order Item, in turn, has a reference back to Order.
Code to use a query cache follows:public List get Street Types(final Country country) throws Hibernate Exception The Cacheable(true) line caches the query. Street Types") line sets the name of the Query Cache.
The name can be whatever you want, but by convention you should use "query." followed by a descriptive name. 使用缓存查询For example, let's say we have a common query running against the Country Domain.配置(Configuring caches to overflow to off-heap.) Declarative Configuration-说明性的配置(通过xml配置文件) 注意，NOTE: Dynamically Adding Caches With Fixed-Sized Offheap If a Cache Manager has a pooled offheap setting, caches with fixed-size offheap settings cannot be added dynamically.