Aspect-Cache-Plug

Aspect-Cache-Plug，基于方法的切片缓存插件。

先介绍缓存使用下场景：

对同一请求（针对不同请求参数）进行缓存，可以减少服务器压力、加快响应速度

查询接口：根据请求条件对返回结果进行缓存
更新接口：根据条件对指定缓存进行清除

@Aspect(key = "query")
public Object query(String q) {
  // do something
  return null;
}

@Aspect(key = "update")
public Object update(String q) {
  // do something  
  return null;
}

缓存query方法返回值

<bean class="com.aspect.config.CacheConfig">
    <property name="key" value="query"/>
    <property name="space" value="space2"/>
    <property name="keyExpression">
        <value>this[0]+new java.util.Date()</value>
    </property>                 
    <property name="timeout" value="60"/>
</bean>

执行update时清除query的返回结果

<bean class="com.aspect.config.ClearConfig">
    <property name="key" value="update"/>    
    <property name="cachedConfigs">
        <list>
            <value>query</value>
        </list>
    </property>
</bean>

加入spring支持

<aop:config> 
        <aop:pointcut id="adviceAspectPoint" expression="execution(* com.sample..*.*(..)) and @annotation(Aspect)" /> 
        <aop:aspect ref="adviceAspect"> 
            <aop:around method="execute" pointcut-ref="adviceAspectPoint" arg-names="Aspect" />
        </aop:aspect> 
    </aop:config>

    <bean id="adviceAspect" class="com.aspect.AdviceAspect">
        <property name="rootKey" value="aspect.cache."/>
        <property name="cache" ref="cache"/>
        <property name="caches">
            <list>
                <bean class="com.aspect.config.CacheConfig">
                    <property name="key" value="queryMethod1"/>
                    <property name="space" value="space1"/>
                    <property name="keyExpression">
                        <value>this[1]+"."+this[2]</value>
                    </property>
                    <property name="domainExpression">
                        <value>this[0]</value>
                    </property>
                    <property name="timeout" value="60"/>
                </bean>
                <bean class="com.aspect.config.CacheConfig">
                    <property name="key" value="queryMethod2"/>
                    <property name="space" value="space1"/>
                    <property name="keyExpression">
                        <value>this[0]</value>
                    </property>                 
                    <property name="timeout" value="60"/>
                </bean>
                <bean class="com.aspect.config.CacheConfig">
                    <property name="key" value="space2QueryMethod1"/>
                    <property name="space" value="space2"/>
                    <property name="keyExpression">
                        <value>this[0]+new java.util.Date()</value>
                    </property>                 
                    <property name="timeout" value="60"/>
                </bean>
            </list>
        </property>
        <property name="clears">
            <list>
                <bean class="com.aspect.config.ClearConfig">
                    <property name="key" value="updateMethod1"/>
                    <property name="domainExpression">
                        <value>this[0]</value>
                    </property>
                    <property name="cachedConfigs">
                        <list>
                            <value>queryMethod1</value>
                            <value>space2QueryMethod1</value>
                        </list>
                    </property>
                </bean>
            </list>
        </property>
    </bean>