Cache Extension

Cache Extension

Extension Description

Use request parameters as keys to cache return results.

Extension Interface

org.apache.dubbo.cache.CacheFactory

Extension Configuration

  1. <dubbo:service cache="lru" />
  2. <!-- Method-level caching -->
  3. <dubbo:service><dubbo:method cache="lru" /></dubbo:service> 
  4. <!-- Default value setting, used when <dubbo:service> does not configure the cache property -->
  5. <dubbo:provider cache="xxx,yyy" />

Known Extensions

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

Extension Examples

Maven project structure:

  1. src
  2.  |-main
  3.     |-java
  4.         |-com
  5.             |-xxx
  6.                 |-XxxCacheFactory.java (implements CacheFactory interface)
  7.     |-resources
  8.         |-META-INF
  9.             |-dubbo
  10.                 |-org.apache.dubbo.cache.CacheFactory (plain text file, content: 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

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Last modified September 30, 2024: Update & Translate Overview Docs (#3040) (d37ebceaea7)