9.24. 缓存扩展

<dubbo:service cache="lru" />
<!-- 方法级缓存 -->
<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 -->
<dubbo:provider cache="xxx,yyy" />

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

• Maven 项目结构：

  src
   |-main
      |-java
          |-com
              |-xxx
                  |-XxxCacheFactory.java (实现CacheFactory接口)
      |-resources
          |-META-INF
              |-dubbo
                  |-org.apache.dubbo.cache.CacheFactory (纯文本文件，内容为：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