程序包 org.apache.dubbo.cache.filter

类 CacheFilter

java.lang.Object

org.apache.dubbo.cache.filter.CacheFilter

所有已实现的接口:

Filter

@Activate(group={"consumer","provider"},
          value="cache")
public class CacheFilter
extends Object
implements Filter

CacheFilter is a core component of dubbo.Enabling cache key of service,method,consumer or provider dubbo will cache method return value. Along with cache key we need to configure cache type. Dubbo default implemented cache types are

lru threadlocal jcache expiring

   e.g. 1)<dubbo:service cache="lru" />
        2)<dubbo:service /> <dubbo:method name="method2" cache="threadlocal" /> <dubbo:service/>
        3)<dubbo:provider cache="expiring" />
        4)<dubbo:consumer cache="jcache" />

If cache type is defined in method level then method level type will get precedence. According to above provided
example, if service has two method, method1 and method2, method2 will have cache type as threadlocal where others will
be backed by lru

另请参阅:

Filter, LruCacheFactory, LruCache, JCacheFactory, JCache, ThreadLocalCacheFactory, ThreadLocalCache, ExpiringCacheFactory, ExpiringCache

嵌套类概要

从接口继承的嵌套类/接口 org.apache.dubbo.rpc.Filter

Filter.Listener

构造器概要

构造器

构造器	说明
CacheFilter()

方法概要

修饰符和类型	方法	说明
Result	invoke(Invoker<?> invoker, Invocation invocation)	If cache is configured, dubbo will invoke method on each method call.
void	setCacheFactory(CacheFactory cacheFactory)	Dubbo will populate and set the cache factory instance based on service/method/consumer/provider configured cache attribute value.

从类继承的方法 java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

CacheFilter

public CacheFilter()

方法详细资料

setCacheFactory

public void setCacheFactory(CacheFactory cacheFactory)

Dubbo will populate and set the cache factory instance based on service/method/consumer/provider configured cache attribute value. Dubbo will search for the class name implementing configured cache in file org.apache.dubbo.cache.CacheFactory under META-INF sub folders.

参数:

cacheFactory - instance of CacheFactory based on cache type

invoke

public Result invoke(Invoker<?> invoker,
                     Invocation invocation)
              throws RpcException

If cache is configured, dubbo will invoke method on each method call. If cache value is returned by cache store then it will return otherwise call the remote method and return value. If remote method's return value has error then it will not cache the value.

指定者:

invoke 在接口中 Filter

参数:

invoker - service

invocation - invocation.

返回:

Cache returned value if found by the underlying cache store. If cache miss it will call target method.

抛出:

RpcException