Is it possible to set a different specification per cache using caffeine in spring boot?

问题

I have a simple sprint boot application using spring boot 1.5.11.RELEASE with @EnableCaching on the Application Configuration class.

pom.xml

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
 </dependency>
 <dependency>
            <groupId>com.github.ben-manes.caffeine</groupId>
            <artifactId>caffeine</artifactId>
 </dependency>

application.properties

spring.cache.type=caffeine
spring.cache.cache-names=cache-a,cache-b
spring.cache.caffeine.spec=maximumSize=100, expireAfterWrite=1d

Question

My question is simple, how can one specify a different size/expiration per cache. E.g. perhaps it's acceptable for cache-a to be valid for 1 day. But cache-b might be ok for 1 week. The specification on a caffeine cache appears to be global to the CacheManager rather than Cache. Am I missing something? Perhaps there is a more suitable provider for my use case?

回答1:

This is your only chance:

@Bean
public CaffeineCache cacheA() {
    return new CaffeineCache("CACHE_A",
            Caffeine.newBuilder()
                    .expireAfterAccess(1, TimeUnit.DAYS)
                    .build());
}

@Bean
public CaffeineCache cacheB() {
    return new CaffeineCache("CACHE_B",
            Caffeine.newBuilder()
                    .expireAfterWrite(7, TimeUnit.DAYS)
                    .recordStats()
                    .build());
}

Just expose your custom caches as beans. They are automatically added to the CaffeineCacheManager.

回答2:

I converted my initial PR into a separate tiny project.

To start using it just add the latest dependency from Maven Central:

<dependency>
    <groupId>io.github.stepio.coffee-boots</groupId>
    <artifactId>coffee-boots</artifactId>
    <version>2.0.0</version>
</dependency>

Format of properties is the following:

coffee-boots.cache.spec.myCache=maximumSize=100000,expireAfterWrite=1m

If no specific configuration is defined, CacheManager defaults to Spring's behavior.

来源：https://stackoverflow.com/questions/49885064/is-it-possible-to-set-a-different-specification-per-cache-using-caffeine-in-spri

标签

spring-boot

spring-cache

caffeine