{"id":43597,"date":"2023-07-23T20:26:45","date_gmt":"2023-05-15T17:06:25","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8spring-boot%e6%97%b6%ef%bc%8c%e9%80%9a%e8%bf%87caffeine%e7%bc%93%e5%ad%98%e8%8e%b7%e5%8f%96%e6%8c%87%e6%a0%87%e6%97%b6%ef%bc%8c%e5%8f%af%e4%bb%a5%e4%bd%bf%e7%94%a8prometheus%e6%9d%a5\/"},"modified":"2024-04-30T15:01:03","modified_gmt":"2024-04-30T07:01:03","slug":"%e4%bd%bf%e7%94%a8spring-boot%e6%97%b6%ef%bc%8c%e9%80%9a%e8%bf%87caffeine%e7%bc%93%e5%ad%98%e8%8e%b7%e5%8f%96%e6%8c%87%e6%a0%87%e6%97%b6%ef%bc%8c%e5%8f%af%e4%bb%a5%e4%bd%bf%e7%94%a8prometheus%e6%9d%a5","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8spring-boot%e6%97%b6%ef%bc%8c%e9%80%9a%e8%bf%87caffeine%e7%bc%93%e5%ad%98%e8%8e%b7%e5%8f%96%e6%8c%87%e6%a0%87%e6%97%b6%ef%bc%8c%e5%8f%af%e4%bb%a5%e4%bd%bf%e7%94%a8prometheus%e6%9d%a5\/","title":{"rendered":"\u4f7f\u7528Spring Boot\u65f6\uff0c\u901a\u8fc7Caffeine\u7f13\u5b58\u83b7\u53d6\u6307\u6807\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528Prometheus\u6765\u83b7\u53d6"},"content":{"rendered":"

\u9a8c\u8bc1\u7248\u672c<\/h2>\n

Spring Boot 2.1.0.RELEASE \u7684\u91ca\u653e\u7248\u672c\u3002<\/p>\n

\u4f7f\u7528Spring Boot\u6765\u4f7f\u7528\u7f13\u5b58<\/h2>\n

\u9996\u5148\u8fdb\u884c\u7f13\u5b58\u7684\u8bbe\u7f6e\u3002\u8981\u505a\u7684\u662f<\/p>\n

spring-boot-starter-cache \u306e\u4f9d\u5b58\u3092\u5165\u308c\u308b
\nCacheable\u306amethod\u3092\u66f8\u304f\u3002\u3053\u308c\u306fController\u306b\u7f6e\u304b\u306a\u3044\u3002\u5225\u306eComponent\u306b\u7f6e\u304f\u3002
\nConfiguration\u30af\u30e9\u30b9\u304bApplication\u30af\u30e9\u30b9\u306b@EnableCaching\u3092\u3064\u3051\u308b<\/p>\n

\u4e09\u70b9<\/p>\n

\u52a0\u5165 spring-boot-starter-cache \u7684\u4f9d\u8d56<\/h3>\n

\u5982\u679c\u4f7f\u7528Gradle\uff0c\u53ef\u4ee5\u5728build.gradle\u6587\u4ef6\u7684dependencies\u90e8\u5206\u8fdb\u884c\u6307\u5b9a\u3002\u4e3a\u4e86\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684web\u5e03\u5c40\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u5b9a\u4e49\u4f9d\u8d56\u5173\u7cfb\u3002<\/p>\n

dependencies<\/span> {<\/span>\r\n    implementation<\/span>(<\/span>'org.springframework.boot:spring-boot-starter-actuator'<\/span>)<\/span>\r\n    implementation<\/span>(<\/span>'org.springframework.boot:spring-boot-starter-cache'<\/span>)<\/span>\r\n    implementation<\/span>(<\/span>'org.springframework.boot:spring-boot-starter-web'<\/span>)<\/span>\r\n    compileOnly<\/span>(<\/span>'org.projectlombok:lombok'<\/span>)<\/span>\r\n    testImplementation<\/span>(<\/span>'org.springframework.boot:spring-boot-starter-test'<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9a\u4e49\u53ef\u7f13\u5b58\u7684\u65b9\u6cd5\u3002<\/h3>\n
\u9002\u5f53\u5730\u51c6\u5907\u4e00\u4e2aRepository\u7c7b\uff0c\u5e76\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u5b9e\u73b0\uff0c\u4ece\u7f13\u5b58\u4e2d\u53d6\u51fa\u4e00\u6b21\u56de\u663e\u7684\u6570\u503c\u3002 @Cacheable\u7684value\u88ab\u8bbe\u7f6e\u4e3acacheName\u3002<\/p>\n
@Slf4j<\/span>\r\n@Repository<\/span>\r\npublic<\/span> class<\/span> EchoRepository<\/span> {<\/span>\r\n\r\n    @Cacheable<\/span>(<\/span>\"echo\"<\/span>)<\/span>\r\n    public<\/span> String<\/span> echo<\/span>(<\/span>String<\/span> value<\/span>)<\/span> {<\/span>\r\n        log<\/span>.<\/span>info<\/span>(<\/span>\"no cache: {}\"<\/span>,<\/span> value<\/span>);<\/span>\r\n        return<\/span> value<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6b64\u5916\uff0c\u8fd8\u9700\u8981\u5b9e\u73b0\u8c03\u7528\u6b64\u5904\u7406\u7684RestController\u63a7\u5236\u5668\u3002<\/p>\n
@RequiredArgsConstructor<\/span>\r\n@RestController<\/span>\r\npublic<\/span> class<\/span> EchoController<\/span> {<\/span>\r\n\r\n    private<\/span> final<\/span> EchoRepository<\/span> repository<\/span>;<\/span>\r\n\r\n    @GetMapping<\/span>(<\/span>\"echo\"<\/span>)<\/span>\r\n    public<\/span> String<\/span> echo<\/span>(<\/span>@RequestParam<\/span>  String<\/span> value<\/span>)<\/span> {<\/span>\r\n        return<\/span> repository<\/span>.<\/span>echo<\/span>(<\/span>value<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728Configuration\u7c7b\u6216Application\u7c7b\u4e2d\u52a0\u4e0a@EnableCaching\u6ce8\u89e3\u3002<\/h3>\n
\u6682\u65f6\u5c06\u5176\u9644\u52a0\u5728Application\u7c7b\u4e2d\u3002<\/p>\n
@EnableCaching<\/span>\r\n@SpringBootApplication<\/span>\r\npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8003\u8bd5<\/h3>\n
\u4f7f\u7528\u4e24\u4e2a\u53c2\u6570\u8fdb\u884c\u4e24\u6b21\u8c03\u7528\u3002<\/p>\n
$ curl http:\/\/localhost:8080\/echo?value=test\r\ntest$ \r\n$ curl http:\/\/localhost:8080\/echo?value=test\r\ntest$ \r\n$ curl http:\/\/localhost:8080\/echo?value=test1\r\ntest1$ \r\n$ curl http:\/\/localhost:8080\/echo?value=test1\r\ntest1$ \r\n<\/code><\/pre>\n
\u67e5\u770b\u65e5\u5fd7<\/p>\n
2018-10-31 23:41:26.824  INFO 3663 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 18 ms\r\n2018-10-31 23:41:26.914  INFO 3663 --- [nio-8080-exec-1] c.k.demo.repository.EchoRepository       : no cache: test\r\n2018-10-31 23:41:34.690  INFO 3663 --- [nio-8080-exec-3] c.k.demo.repository.EchoRepository       : no cache: test1\r\n<\/code><\/pre>\n
\u4f3c\u4e4e\u5df2\u7ecf\u7f13\u5b58\u4e86<\/p>\n
\u4f7f\u7528\u5496\u5561\u56e0<\/h2>\n
\u5728\u8fd9\u91cc\uff0c\u7f13\u5b58\u5b9e\u73b0\u662f\u53ef\u4ee5\u9009\u62e9\u7684\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u4f3c\u4e4e\u4f1a\u9009\u62e9\u4f7f\u7528\u57fa\u4e8eConcurrentHashMap\u7684\u7b80\u5355\u5b9e\u73b0\uff0c\u4f46\u6211\u4eec\u8fd9\u91cc\u4f7f\u7528Caffeine\u3002<\/p>\n
\u53ea\u9700\u6dfb\u52a0implementation(‘com.github.ben-manes.caffeine:caffeine’)\u5230\u4f9d\u8d56\u9879\u4e2d\uff0c\u5373\u53ef\u4f7f\u7528\u3002<\/p>\n
\u6536\u96c6\u5496\u5561\u56e0\u7684\u5ea6\u91cf\u6307\u6807<\/h2>\n
\u5728\u5fae\u6d4b\u4e2d\u5b9e\u73b0\u4e86\u6536\u96c6Caffeine\u6307\u6807\u7684\u5b9e\u73b0\uff0c\u6211\u60f3\u8981\u5229\u7528\u5b83\u3002<\/p>\n
\u4f7f\u7528Spring Boot actuator\u63d0\u4f9bPrometheus\u7684\u7ec8\u7aef\u70b9\u3002<\/h3>\n
\u9996\u5148\uff0c\u5728dependencies\u4e2d\u6dfb\u52a0implementation(‘io.micrometer:micrometer-registry-prometheus’)\u3002\u7136\u540e\uff0c\u5728application.yml\u4e2d\u6dfb\u52a0management.endpoints.web.exposure.include: prometheus\uff0c\u4ee5\u4fbf\u53ef\u4ee5\u8bbf\u95eeprometheus\u7684\u7aef\u70b9\uff0c\u5e76\u53ef\u4ee5\u4f7f\u7528curl\u5c1d\u8bd5\u53d1\u9001\u8bf7\u6c42\uff0c\u83b7\u53d6\u9ed8\u8ba4\u7684\u6307\u6807\u548c\u7531AutoConfiguration\u6ce8\u518c\u7684\u6307\u6807\u3002\u8bf7\u6ce8\u610f\uff0cactuator\u7684\u57fa\u672c\u8def\u5f84\u7531management.endpoints.web.base-path\u5b9a\u4e49\uff0c\u9ed8\u8ba4\u4e3a\/actuator\u3002<\/p>\n
$ curl http:\/\/localhost:8080\/actuator\/prometheus 2>\/dev\/null | head\r\n# HELP tomcat_global_request_seconds  \r\n# TYPE tomcat_global_request_seconds summary\r\ntomcat_global_request_seconds_count{name=\"http-nio-8080\",} 4.0\r\ntomcat_global_request_seconds_sum{name=\"http-nio-8080\",} 0.597\r\n# HELP tomcat_threads_config_max_threads  \r\n# TYPE tomcat_threads_config_max_threads gauge\r\ntomcat_threads_config_max_threads{name=\"http-nio-8080\",} 200.0\r\n# HELP tomcat_sessions_active_current_sessions  \r\n# TYPE tomcat_sessions_active_current_sessions gauge\r\ntomcat_sessions_active_current_sessions 0.0\r\n<\/code><\/pre>\n
\u6dfb\u52a0\u8bbe\u7f6e\u4ee5\u6536\u96c6\u5496\u5561\u56e0\u7684\u5ea6\u91cf\u6807\u51c6\u3002<\/h3>\n
\u5728application.yml\u4e2d\u5b9a\u4e49spring.cache.caffeine.spec: maximumSize=500,expireAfterAccess=600s,recordStats\u53ef\u4ee5\u5c06recordStats\u53c2\u6570\u653e\u5165spring.cache.caffeine.spec\u4e2d\u3002\u5728\u6307\u6807\u6536\u96c6\u65b9\u9762\uff0c\u53ea\u9700\u8981recordStats\u5373\u53ef\uff0c\u4f46\u5176\u4ed6\u53ef\u914d\u7f6e\u7684\u503c\u53ef\u4ee5\u53c2\u8003CaffeineSpec.java\u3002<\/p>\n
\u6211\u539f\u672c\u4ee5\u4e3a\u4f1a\u4ece\u8fd9\u91cc\u5f00\u59cb\u53d6\u5f97\u2026<\/h3>\n
\u5728\u8c03\u7528\u5148\u524d\u5b9e\u73b0\u7684\/echo\u540e\uff0c\u8c03\u7528prometheus\u7684\u7aef\u70b9\u3002<\/p>\n
$ curl http:\/\/localhost:8080\/echo?value=test\r\ntest$ \r\n$ curl http:\/\/localhost:8080\/actuator\/prometheus 2>\/dev\/null | grep cache\r\n# HELP tomcat_cache_access_total  \r\n# TYPE tomcat_cache_access_total counter\r\ntomcat_cache_access_total 0.0\r\n# HELP tomcat_cache_hit_total  \r\n# TYPE tomcat_cache_hit_total counter\r\ntomcat_cache_hit_total 0.0\r\n<\/code><\/pre>\n
…\u8bf7\u5c06\u4ee5\u4e0b\u5185\u5bb9\u7528\u4e2d\u6587\u8fdb\u884c\u6539\u5199\uff0c\u53ea\u9700\u8981\u4e00\u79cd\u9009\u9879\uff1a<\/p>\n
…<\/p>\n
spring.cache.cache-names \u7684\u914d\u7f6e<\/h3>\n
\u770b\u8d77\u6765\uff0c\u6839\u636eCacheMetricsRegistrar\u7684\u5b9e\u73b0\uff0c\u5982\u679c\u4e0d\u4e8b\u5148\u5c06\u9759\u6001\u4f7f\u7528\u7684\u7f13\u5b58cache\u7684\u540d\u79f0\u5199\u5728application.yml\u4e2d\uff0c\u5c31\u65e0\u6cd5\u88abMicrometer\u6ce8\u518c\u3002\u56e0\u6b64\uff0c\u4e0e\u7f13\u5b58\u76f8\u5173\u7684\u8bbe\u7f6e\u5e94\u8be5\u5728application.yml\u4e2d\u8fdb\u884c\u3002<\/p>\n
spring.cache:\r\n  cache-names: echo\r\n  caffeine.spec: maximumSize=500,expireAfterAccess=600s,recordStats\r\n<\/code><\/pre>\n
\u786e\u4fdd\u5982\u6b64\u3002\u518d\u6b21\u786e\u8ba4\u540e\u53ef\u83b7\u5f97\u3002<\/p>\n
]$ curl http:\/\/localhost:8080\/actuator\/prometheus 2>\/dev\/null | grep cache\r\n# HELP cache_eviction_weight The sum of weights of evicted entries. This total does not include manual invalidations.\r\n# TYPE cache_eviction_weight gauge\r\ncache_eviction_weight{cache=\"echo\",cacheManager=\"cacheManager\",name=\"echo\",} 0.0\r\n# HELP cache_gets_total the number of times cache lookup methods have returned an uncached (newly loaded) value, or null\r\n# TYPE cache_gets_total counter\r\ncache_gets_total{cache=\"echo\",cacheManager=\"cacheManager\",name=\"echo\",result=\"miss\",} 1.0\r\ncache_gets_total{cache=\"echo\",cacheManager=\"cacheManager\",name=\"echo\",result=\"hit\",} 0.0\r\n# HELP tomcat_cache_hit_total  \r\n# TYPE tomcat_cache_hit_total counter\r\ntomcat_cache_hit_total 0.0\r\n# HELP cache_size The number of entries in this cache. This may be an approximation, depending on the type of cache.\r\n# TYPE cache_size gauge\r\ncache_size{cache=\"echo\",cacheManager=\"cacheManager\",name=\"echo\",} 1.0\r\n# HELP cache_evictions_total cache evictions\r\n# TYPE cache_evictions_total counter\r\ncache_evictions_total{cache=\"echo\",cacheManager=\"cacheManager\",name=\"echo\",} 0.0\r\n# HELP cache_puts_total The number of entries added to the cache\r\n# TYPE cache_puts_total counter\r\ncache_puts_total{cache=\"echo\",cacheManager=\"cacheManager\",name=\"echo\",} 0.0\r\n# HELP tomcat_cache_access_total  \r\n# TYPE tomcat_cache_access_total counter\r\ntomcat_cache_access_total 0.0\r\n<\/code><\/pre>\n
\u6211\u60f3\u8981\u52a8\u6001\u6ce8\u518c\u7531@Cachable\u6307\u5b9a\u7684\u7f13\u5b58\u7684\u6307\u6807\u3002<\/h3>\n
\u4f7f\u7528@SpringCacheable\u6307\u5b9a\u7684\u7f13\u5b58\u540d\u79f0\u5199\u5728spring.cache.cache-names\u4e2d\u4f1a\u53d8\u5f97\u7410\u788e\u548c\u7e41\u7410\uff0c\u800c\u4e14\u5f53\u7f13\u5b58\u6570\u91cf\u589e\u52a0\u65f6\u5bb9\u6613\u51fa\u73b0\u9057\u6f0f\u3002\u5982\u679c\u60f3\u8981\u5b9e\u73b0\u8fd9\u6837\u7684\u529f\u80fd\uff0c\u867d\u7136\u6709\u4e9b\u7b28\u62d9\uff0c\u4f46\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u7ee7\u627f\u81eaCaffeineCacheManager\u7684\u6d3e\u751f\u7c7b\uff0c\u5728CaffeineCache\u521b\u5efa\u65f6\u5c06\u5176\u6ce8\u518c\u5230MeterRegistry\u4e2d\u3002(\u4f46\u4e0d\u5efa\u8bae\u8fd9\u6837\u505a…)<\/p>\n
@RequiredArgsConstructor<\/span>\r\npublic<\/span> class<\/span> InstrumentedCaffeineCacheManager<\/span> extends<\/span> CaffeineCacheManager<\/span> {<\/span>\r\n\r\n    private<\/span> final<\/span> MeterRegistry<\/span> meterRegistry<\/span>;<\/span>\r\n\r\n    @Override<\/span>\r\n    protected<\/span> Cache<\/span><<\/span>Object<\/span>,<\/span> Object<\/span>><\/span> createNativeCaffeineCache<\/span>(<\/span>String<\/span> name<\/span>)<\/span> {<\/span>\r\n        Cache<\/span><<\/span>Object<\/span>,<\/span> Object<\/span>><\/span> nativeCache<\/span> =<\/span> super<\/span>.<\/span>createNativeCaffeineCache<\/span>(<\/span>name<\/span>);<\/span>\r\n        CaffeineCacheMetrics<\/span>.<\/span>monitor<\/span>(<\/span>meterRegistry<\/span>,<\/span> nativeCache<\/span>,<\/span> name<\/span>,<\/span> Collections<\/span>.<\/span>emptyList<\/span>());<\/span>\r\n        return<\/span> nativeCache<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5c06\u6b64\u6ce8\u518c\u4e3aBean\u3002\u4f46\u662f\uff0c\u5728CaffeineCacheConfiguration\u4e2d\uff0c\u9664\u4e86\u7b80\u5355\u5730\u751f\u6210Bean\u4e4b\u5916\uff0c\u8fd8\u9700\u8981\u8fdb\u884c\u5176\u4ed6\u5904\u7406\uff0c\u56e0\u6b64\u8fdb\u884c\u62f7\u8d1d\u3002<\/p>\n
@EnableConfigurationProperties<\/span>(<\/span>CacheProperties<\/span>.<\/span>class<\/span>)<\/span>\r\n@EnableCaching<\/span> \/\/ Application class\u304b\u3089\u3053\u3061\u3089\u306b\u79fb\u52d5\u3057\u305f<\/span>\r\n@Configuration<\/span>\r\n@RequiredArgsConstructor<\/span>\r\npublic<\/span> class<\/span> CacheConfig<\/span> {<\/span>\r\n\r\n    private<\/span> final<\/span> MeterRegistry<\/span> meterRegistry<\/span>;<\/span>\r\n\r\n    private<\/span> final<\/span> CacheProperties<\/span> cacheProperties<\/span>;<\/span>\r\n\r\n    \/\/ CaffeineCacheConfiguration\u306e\u5b9f\u88c5\u3092copy<\/span>\r\n    @Bean<\/span>\r\n    public<\/span> CaffeineCacheManager<\/span> cacheManager<\/span>()<\/span> {<\/span>\r\n        CaffeineCacheManager<\/span> cacheManager<\/span> =<\/span> createCacheManager<\/span>();<\/span>\r\n        List<\/span><<\/span>String<\/span>><\/span> cacheNames<\/span> =<\/span> cacheProperties<\/span>.<\/span>getCacheNames<\/span>();<\/span>\r\n        if<\/span> (!<\/span>CollectionUtils<\/span>.<\/span>isEmpty<\/span>(<\/span>cacheNames<\/span>))<\/span> {<\/span>\r\n            cacheManager<\/span>.<\/span>setCacheNames<\/span>(<\/span>cacheNames<\/span>);<\/span>\r\n        }<\/span>\r\n        return<\/span> cacheManager<\/span>;<\/span>\r\n    }<\/span>\r\n    \/\/ \u3053\u3053\u3067\u72ec\u81eaCaffeineCacheManager\u3092\u751f\u6210<\/span>\r\n    private<\/span> CaffeineCacheManager<\/span> createCacheManager<\/span>()<\/span> {<\/span>\r\n        CaffeineCacheManager<\/span> cacheManager<\/span> =<\/span> new<\/span> InstrumentedCaffeineCacheManager<\/span>(<\/span>meterRegistry<\/span>);<\/span>\r\n        setCacheBuilder<\/span>(<\/span>cacheManager<\/span>);<\/span>\r\n        return<\/span> cacheManager<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    private<\/span> void<\/span> setCacheBuilder<\/span>(<\/span>CaffeineCacheManager<\/span> cacheManager<\/span>)<\/span> {<\/span>\r\n        String<\/span> specification<\/span> =<\/span> cacheProperties<\/span>.<\/span>getCaffeine<\/span>().<\/span>getSpec<\/span>();<\/span>\r\n        if<\/span> (<\/span>StringUtils<\/span>.<\/span>hasText<\/span>(<\/span>specification<\/span>))<\/span> {<\/span>\r\n            cacheManager<\/span>.<\/span>setCacheSpecification<\/span>(<\/span>specification<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u6837\uff0c\u5373\u4f7f\u4e0d\u5728application.yml\u4e2d\u5199\u5165spring.cache.cache-names\uff0c\u4e5f\u80fd\u591f\u52a8\u6001\u5730\u6ce8\u518c\u5e26\u6709@Cacheable\u6807\u8bb0\u7684\u7f13\u5b58\u7684\u6307\u6807\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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