Reactive Cache Support

The aim of this project is to implement a general approach to reactive cache operations.

Introduction

• This project is compatible with reactivestream aka project-reactor
• This project could integrate with Spring Framework (version>= 2.x)
• This project implement reactive cache for business application scenarios. The default implementation includes the following:
  • InmemeoryReactiveCache uses java.util.concurrent.DelayQueue to implement cache behavior
  • CaffeineReactiveCache uses com.github.benmanes.caffeine.cache.Cache to implement cache behavior
  • RedisReactiveCache uses redis and spring-boot-data-redis to implement cache behavior
  • DefaultReactiveCache uses customized configuration which specific configured by uses to implement cache behavior

Usage

• Maven Central

<dependency>
  <groupId>pro.chenggang</groupId>
  <artifactId>reactive-cache-support</artifactId>
  <version>${latest.version}</version>
</dependency>

• Standalone usages

InmemoryReactiveCache

ReactiveCacheManager reactiveCacheManager = ReactiveCacheManagerBuilder.newInmemoryReactiveCacheManagerBuilder()
                .withMaxWaitingDuration(Duration.ofSeconds(5))
                .build();

CaffeineReactiveCache

ReactiveCacheManager reactiveCacheManager = ReactiveCacheManagerBuilder.newCaffeineReactiveCacheManagerBuilder()
                .withMaxWaitingDuration(Duration.ofSeconds(5))
                .build();

RedisReactiveCache

ReactiveCacheManager reactiveCacheManager = ReactiveCacheManagerBuilder.newRedisReactiveCacheManagerBuilder(
                        reactiveRedisTemplate)
                .withMaxWaitingDuration(Duration.ofSeconds(5))
                .build();

Customized ReactiveCache

ReactiveCacheManager reactiveCacheManager = ReactiveCacheManagerBuilder.newCustomReactiveCacheManagerBuilder()
                .withMaxWaitingDuration(Duration.ofSeconds(5))
                // Customized ReactiveCacheLock instance implemented interface ReactiveCacheLock
                .withReactiveCacheLock()
                // Customized ReactiveCacheMonoAdapter instance implemented interface ReactiveCacheMonoAdapter
                .withReactiveCacheMonoAdapter()
                // Customized ReactiveCacheFluxAdapter instance implemented interface ReactiveCacheFluxAdapter
                .withReactiveCacheFluxAdapter()
                .build();

• SpringBoot usages

  • Configuration properties as:

  reactive:
    cache:
      enabled: true
      type: inmemory
      maxWaitingDuration: PT5S

  • Using with spring auto-injection

  @Autowired
  ReactiveCacheManager reactiveCacheManager;

  • Caching operation

    // Initialize ReactiveCacheManager instance manually with ReactiveCacheManagerBuilder
    // Or auto-injected in spring boot context 
    ReactiveCacheManager reactiveCacheManager;
  
    @Test
    void get() {
        reactiveCache.monoCache()
                .get(cacheKey)
                .as(StepVerifier::create)
                .expectError(NoSuchCachedReactiveDataException.class)
                .verify();
    }
  
    @Test
    void cacheIfNecessary() {
        reactiveCache.monoCache()
                .cacheIfNecessary(cacheKey, Duration.ofSeconds(3), Mono.just(true))
                .as(StepVerifier::create)
                .expectNext(true)
                .verifyComplete();
        reactiveCache.monoCache()
                .get(cacheKey)
                .as(StepVerifier::create)
                .expectNext(true)
                .verifyComplete();
    }
  
    @Test
    void getMany() {
        reactiveCache.fluxCache()
                .get(cacheKey)
                .as(StepVerifier::create)
                .expectError(NoSuchCachedReactiveDataException.class)
                .verify();
    }
  
    @Test
    void cacheManyIfNecessary() {
        reactiveCache.fluxCache()
                .cacheIfNecessary(cacheKey, Duration.ofSeconds(3), Flux.range(0,3))
                .as(StepVerifier::create)
                .expectNext(0)
                .expectNext(1)
                .expectNext(2)
                .verifyComplete();
        reactiveCache.fluxCache()
                .get(cacheKey)
                .as(StepVerifier::create)
                .expectNext(0)
                .expectNext(1)
                .expectNext(2)
                .verifyComplete();
    }
  
    @Test
    void evictCache() {
        reactiveCache.monoCache()
                .evictCache(cacheKey)
                .as(StepVerifier::create)
                .verifyComplete();
        reactiveCache.fluxCache()
                .evictCache(cacheKey)
                .as(StepVerifier::create)
                .verifyComplete();
        reactiveCache.monoCache()
                .cacheIfNecessary(cacheKey, Duration.ofSeconds(3), Mono.just(true))
                .as(StepVerifier::create)
                .expectNext(true)
                .verifyComplete();
        reactiveCache.monoCache()
                .evictCache(cacheKey)
                .as(StepVerifier::create)
                .verifyComplete();
        reactiveCache.fluxCache()
                .cacheIfNecessary(cacheKey, Duration.ofSeconds(3), Flux.range(0,3))
                .as(StepVerifier::create)
                .expectNext(0)
                .expectNext(1)
                .expectNext(2)
                .verifyComplete();
        reactiveCache.fluxCache()
                .evictCache(cacheKey)
                .as(StepVerifier::create)
                .verifyComplete();
    }

• For more details, please refer to the source code and the test cases.

Note:

• Test cases run with testcontainers, so please ensure that you have access to Docker in your local environment.