缓存扩展

扩展说明

用请求参数作为 key，缓存返回结果。

扩展接口

org.apache.dubbo.cache.CacheFactory

扩展配置

  1. <dubbo:service cache="lru" />
  2. <!-- 方法级缓存 -->
  3. <dubbo:service><dubbo:method cache="lru" /></dubbo:service> 
  4. <!-- 缺省值设置，当<dubbo:service>没有配置cache属性时，使用此配置 -->
  5. <dubbo:provider cache="xxx,yyy" />

已知扩展

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

扩展示例

Maven 项目结构：

  1. src
  2.  |-main
  3.     |-java
  4.         |-com
  5.             |-xxx
  6.                 |-XxxCacheFactory.java (实现CacheFactory接口)
  7.     |-resources
  8.         |-META-INF
  9.             |-dubbo
  10.                 |-org.apache.dubbo.cache.CacheFactory (纯文本文件，内容为：xxx=com.xxx.XxxCacheFactory)

XxxCacheFactory.java：

  1. package com.xxx;
  3. import org.apache.dubbo.cache.CacheFactory;
  5. public class XxxCacheFactory implements CacheFactory {
  6.     public Cache getCache(URL url, String name) {
  7.         return new XxxCache(url, name);
  8.     }
  9. }

XxxCache.java：

  1. package com.xxx;
  3. import org.apache.dubbo.cache.Cache;
  5. public class XxxCache implements Cache {
  6.     public Cache(URL url, String name) {
  7.         // ...
  8.     }
  9.     public void put(Object key, Object value) {
  10.         // ...
  11.     }
  12.     public Object get(Object key) {
  13.         // ...
  14.     }
  15. }

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

  1. xxx=com.xxx.XxxCacheFactory

最后修改 September 21, 2021: Bug fix miss mialbox (#953) (57cf51b)