How to Cache HTTP Requests made with Netflix's Feign library in a Java Spring app

spring caching netflix-feign spring-cloud-netflix spring-cloud-feign
Alejandro picture Alejandro · Apr 30, 2016 · Viewed 8.1k times · Source

In a spring boot application using Netflix's Feign to make HTTP requests to a service, is there an easy way to cache and return these cached values automatically? The cache should be based on the parameters passed to the request (similar to memoizing a function for X minutes).

I'm looking for something like the @Cache annotation below:

@Component
@FeignClient(value = "facebook", url = "${auth.facebook.url}")
public interface FacebookClient {
    @Cache(600) // Something like this.
    @RequestMapping(method = RequestMethod.GET, value = "/debug_token?input_token={input_token}&access_token={access_token}")
    Map debugToken(@PathVariable("input_token") String inputToken, @PathVariable("access_token") String appToken);
}

Of course I could cache it myself using a decorator around the FacebookClient, I was wondering if there was a quicker/less code way.

Answer

Tobsch picture Tobsch · Mar 7, 2017

Feign does not support caching. I would prefer the JCache (JSR-107) and maybe use it via the spring-boot-starter-cache described in the spring guide

JCache is an abstraction for the proprietary implementation of EhCache, Hazelcast, ... so it is possible to change the implementation with very less impact on the application. At first I would prefer EhCache 3.

Related questions

Spring Cache @Cacheable - not working while calling from another method of the same bean

Spring cache is not working when calling cached method from another method of the same bean. Here is an example to explain my problem in clear way. Configuration: <cache:annotation-driven cache-manager="myCacheManager" /> <bean id="myCacheManager" class="org.…

Read More
How do I tell Spring cache not to cache null value in @Cacheable annotation

Is there a way to specify that if the method returns null value, then don't cache the result in @Cacheable annotation for a method like this? @Cacheable(value="defaultCache", key="#pk") public Person findPerson(int pk) { return getSession.getPerson(pk); } …

Read More
Spring @Cacheable default TTL

I generally use the @Cacheable with a cache config in my spring-boot app and set specific TTL (time to live) for each cache. I recently inherited a spring boot app that uses @Cacheable without explicitly stating a cache manager and …

Read More