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14.3.4.3.3. Cache Keys for Cached Results

As a default, the @CacheResult annotation creates a key for the results fetched from a cache. The key consists of a combination of all parameters in the relevant method.
Create a custom key using the @CacheKeyParam annotation as follows: 
@CacheResult
public void doSomething
	(@CacheKeyParam String p1,
	@CacheKeyParam String p2,
	String dontCare) {
...
}
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In the specified example, only the values of p1 and p2 are used to create the cache key. The value of dontCare is not used when determining the cache key.
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