Cache Extension

    Summary

    Cache the return value, use request parameter as the key.

    Extension Interface

    org.apache.dubbo.cache.CacheFactory

    Extension Configuration

    <dubbo:service cache="lru" />
    <!-- method level cache -->
    <dubbo:service><dubbo:method cache="lru" /></dubbo:service> 
    <!-- 缺省值设置,当<dubbo:service>没有配置cache属性时,使用此配置 -->
    <!-- default configuration, will take affect if cache attribute isn't configured in <dubbo:service> -->
    <dubbo:provider cache="xxx,yyy" /> 
    

    Existing Extensions

    • org.apache.dubbo.cache.support.lru.LruCacheFactory
    • org.apache.dubbo.cache.support.threadlocal.ThreadLocalCacheFactory
    • org.apache.dubbo.cache.support.jcache.JCacheFactory

    Extension Guide

    Directory layout:

    src
     |-main
        |-java
            |-com
                |-xxx
                    |-XxxCacheFactory.java (CacheFactory implementation)
        |-resources
            |-META-INF
                |-dubbo
                    |-org.apache.dubbo.cache.CacheFactory (plain text file with contents: xxx=com.xxx.XxxCacheFactory)
    

    XxxCacheFactory.java:

    package com.xxx;
     
    import org.apache.dubbo.cache.CacheFactory;
     
    public class XxxCacheFactory implements CacheFactory {
        public Cache getCache(URL url, String name) {
            return new XxxCache(url, name);
        }
    }
    

    XxxCache.java:

    package com.xxx;
     
    import org.apache.dubbo.cache.Cache;
     
    public class XxxCache implements Cache {
        public Cache(URL url, String name) {
            // ...
        }
        public void put(Object key, Object value) {
            // ...
        }
        public Object get(Object key) {
            // ...
        }
    }
    

    META-INF/dubbo/org.apache.dubbo.cache.CacheFactory:

    xxx=com.xxx.XxxCacheFactory