CODEWITHSUNDEEP
spark-java
Russ Wheeler
Russ Wheeler

Reputation: 2630

Need to return object before/ignoring path in spark java

I want to write my own very basic caching inside my sparkjava server.

My thought is to cache the response somewhere, and have some code in a before block that checks if the incoming path is one that should return the cached string/response or should carry on to the appropriate path and calculate the response (storing it in the cache for future calls).

My question is, if i understand sparkjava properly, is how can i return the response from inside the before block and not carry on into the path

Or maybe it's not possible?

Alternatively, i can check inside every path at the beginning of each, to either use the cached response or create a fresh one, but writing this in every path block instead of writing it once in a before feels wrong/is needlessly duplicating.

Upvotes: 0

Views: 75

Answers (1)

RobbieS
RobbieS

Reputation: 120

I think you can return any string data in a halt() statement during your before-filter. This approach is outlined in the Spark documentation located at: http://sparkjava.com/documentation#halting.

Example:

before( (req, res) -> {

   // somehow prove the request matches a request that was previously cached
   if(req.contextPath() == known_cached_path){
      halt(304, cached_data);
   }
});

Upvotes: 1

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