Cache Extension

Summary

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

Extension Interface

com.alibaba.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

  • com.alibaba.dubbo.cache.support.lru.LruCacheFactory
  • com.alibaba.dubbo.cache.support.threadlocal.ThreadLocalCacheFactory
  • com.alibaba.dubbo.cache.support.jcache.JCacheFactory

Extension Guide

Directory layout:

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

XxxCacheFactory.java:

package com.xxx;

import com.alibaba.dubbo.cache.CacheFactory;

public class XxxCacheFactory implements CacheFactory {
    public Cache getCache(URL url, String name) {
        return new XxxCache(url, name);
    }
}

XxxCacheFactory.java:

package com.xxx;

import com.alibaba.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/com.alibaba.dubbo.cache.CacheFactory:

xxx=com.xxx.XxxCacheFactory

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