007-spring cache-Cache Implementation -02-springboot EHCAHE3 implementation, Springboot caffeine implementation

First, springboot EHCAHE3 implementation steps

EhCache is a pure Java in-process caching framework, which is fast and capable, and is the default Cacheprovider in Hibernate. Ehcache is a widely used, open source Java distributed cache. Primarily for general purpose caches, Java EE and lightweight containers. It features memory and disk storage, cache loaders, cache extensions, cache exception handlers, a gzip cache servlet filter, and support for rest and soap APIs.

Code Address: Https://github.com/bjlhx15/common/tree/master/spring-cache/spring-ehcache

1, Pom

2. Start-Up class annotations

3. Business class annotations

4. Configuration

# Configure Ehcache Cache Spring: Cache  :    jcache:      config:classpath:ehcache3.xml  # # #attention, this is Jcache

5. Ehchahe configuration File "More"

<?XML version= "1.0" encoding= "UTF-8"?><ConfigXmlns:xsi= ' http://www.w3.org/2001/XMLSchema-instance 'xmlns= ' Http://www.ehcache.org/v3 'xsi:schemalocation= "Http://www.ehcache.org/v3 http://www.ehcache.org/schema/ehcache-core.xs">    <!--http://www.ehcache.org/documentation/3.0/xml.html -    <!--5, <cache-template> can let you create an abstract <cache> configuration file, the profile can be further expanded.  -    <cache-templatename= "Heap-cache">        <Resources>            <!--apply for 2000 entries in a heap -            <HeapUnit= "Entries">2000</Heap>            <!--Maximum non-heap memory -            <OffheapUnit= "MB">100</Offheap>        </Resources>    </cache-template>    <Cachealias= "User"uses-template= "Heap-cache">        <expiry>            <!--tti:time to idle, max idle time -            <!--<ttl> time to live; Max Survival -            <!--<class>, custom expiry implementation -            <!--<none> But the period -            <!--minutes, seconds -            <TTLUnit= "Seconds">10</TTL>        </expiry>        <!--<ehcache:key-type>java.lang.Long</ehcache:key-type> -        <!--<ehcache:value-type>com.pany.domain.Customer</ehcache:value-type> -        <!--<ehcache:heap unit= "entries" >200</ehcache:heap> -    </Cache></Config>

Second, springboot caffeine implementation steps

Caffeine is a rewritten version of the guava cache using JAVA8, which will replace guava in Spring Boot 2.0. If Caffeine,caffeinecachemanager appears, it will be configured automatically. You can use the Spring.cache.cache-names property to create a cache at startup, and you can customize it in the following configuration (in order):

• SPRING.CACHE.CAFFEINE.SPEC: Special Cache defined
• Com.github.benmanes.caffeine.cache.CaffeineSpec:bean definition
• Com.github.benmanes.caffeine.cache.Caffeine:bean definition

Code Address: Https://github.com/bjlhx15/common/tree/master/spring-cache/spring-caffeine

1, Pom

2. Start-Up class annotations

3. Business class annotations

4. Configuration

Spring:  cache:    cache-names:user    Caffeine:      spec:initialcapacity=50,maximumsize=500, Expireafterwrite=10s,refreshafterwrite=5s

where spec configuration parameters

Initialcapacity=[integer]: Initial cache space size Maximumsize=[long]: Maximum number of bars cached Maximumweight=[long]: Maximum cache weight expireafteraccess=[ Duration]: Fixed time expires after last write or access expireafterwrite=[duration]: Last write after fixed time expires Refreshafterwrite=[duration]: Create cache or last update cache after a fixed time interval, flush cache Weakkeys: Open the weak reference of key weakvalues: Open the weak reference of value softvalues: Open soft Reference for value recordstats: developing statistical functions

Note: If you use the Refreshafterwrite configuration you must also specify a cacheloader, such as:

 PackageCom.lhx.spring.cache.caffeine;ImportOrg.springframework.context.annotation.Bean;Importorg.springframework.context.annotation.Configuration;ImportCom.github.benmanes.caffeine.cache.CacheLoader; @Configuration Public classcacheloaderself {/*** This bean,refreshafterwrite=5s must be specified for this configuration property to take effect **/@Bean PublicCacheloader<object, object>Cacheloader () {Cacheloader<object, object> Cacheloader =NewCacheloader<object, object>() {@Override PublicObject load (Object key)throwsException {return NULL; }            //override this method to return the OldValue value back to refresh the cache@Override PublicObject reload (Object key, Object OldValue)throwsException {returnOldValue;        }        }; returnCacheloader; }}

Attention:

• When Expireafterwrite and expireafteraccess colleagues are present, the expireafterwrite shall prevail.
• MaximumSize and maximumweight can not be used simultaneously
• Weakvalues and softvalues can not be used simultaneously

007-spring cache-Cache Implementation -02-springboot EHCAHE3 implementation, Springboot caffeine implementation