CODEWITHSUNDEEP
javaspringehcachespelevaluationexception
BITSSANDESH
BITSSANDESH

Reputation: 1135

What is the best way of defining key for @Cacheable annotation for Spring

If I am defining a ehcache for a method which doesn't have any parameter.

But in my use case I needs to access the my built cache through it's key.

So please provide me the better way of assigning key on it.

Follow is my code:

@Override
@Cacheable(value = "cacheName", key = "cacheKey")
public List<String> getCacheMethod() throws Exception{

P.S. I am getting the following error when I am trying to access this method from somewhere else.

org.springframework.expression.spel.SpelEvaluationException: EL1008E:(pos 0): Field or property 'cacheKey' cannot be found on object of type 'org.springframework.cache.interceptor.CacheExpressionRootObject'

Upvotes: 9

Views: 33347

Answers (4)

Kumar Abhishek
Kumar Abhishek

Reputation: 3124

You can solve this using a single quote in the key that makes it String again. 

@Cacheable(value= CACHE_NAME.PRODUCT_CATLOG, key=" 'products' ")
    public List<Product> findAll() {
        return StreamSupport.stream(productRepository.findAll().spliterator(),false).collect(Collectors.toList());
    }

Upvotes: 4

Nikolai Shevchenko
Nikolai Shevchenko

Reputation: 7521

In simple cases you can use an easier way: @Cacheable(key = "#root.methodName"), and the key would be equal to annotated method's name

Upvotes: 7

Manuel Jordan
Manuel Jordan

Reputation: 16291

The method has no parameter, therefore there is no a way to use a parameter/argument as a default key, and you can't use "static text" as a Key, you could do the following:

Declare the following 

public static final String KEY = "cacheKey";
  • must be public
  • must be static and final

Then

@Override
@Cacheable(value = "cacheName", key = "#root.target.KEY")
public List<String> getCacheMethod() throws Exception{

Done

Upvotes: 24

Rafik BELDI
Rafik BELDI

Reputation: 4158

Please take a look at this spring doc.

the key refers to the arguments of your method, you are having SpelEvaluationException because cachekey isn't among your method arguments.

Upvotes: 2

Related Questions