Hello everybody,
I have a String as a key in my cache. Since the DefaultKeyGenerator uses hashCode() for generating the key I cannot use it, because there may be collisions.
It's no problem to provide another implementation of KeyGenerator, but I'm missing a simple way to use it. There is no such attribute on <cache:annotation-driven/> nor on CacheManager nor on Cache, just on the Aspect itself, but I don't wanna declare it myself.
Can somebody help me?
Tobias
Okay, still don't know how to switch the default KeyGenerator implementation, but I realized that I don't really need it when I use the key attribute on the @Cacheable annotation.
By the way, there is an error in the reference documentation. You need to reference the parameter with a hash: key="#parametername", otherwise Spel is trying to find a property parametername on some helper class.
Another problem with Default implementation, it's calculating hashCode of method param, but doesn't include methodName in calculations.
I remember reading documentation, hashCode is combination of methodName + params.
I've ran into the same problem of not having the method name used in the hashCode computation.
I can't figure out how to specify my own implementation of org.springframework.cache.KeyGenerator, the documentation mentions it should be possible.
Have you figured it out? I ran into the same issue? There is setter method in CacheAspectSupport for injecting customKeygenerator but there is no way how to configure it.
Regards
Harshi
Old thread, but here is how you do it:
<cache:annotation-driven key-generator="myKeyGenerator" />
<bean id="myKeyGenerator" class="com.whereever.spring.MyLessSuckyKeyGenerato r" />
As for the DefaultKeyGenerator, you can bypass it with:
@Cacheable(value="myCache",key="#root.methodName,# parameter,...")