IBatis.net 缓存

上一篇IBatis.net ORM初体验简单介绍了IBatis.net的基本应用.本篇介绍下IBatis.net的缓存应用.

还是接着上篇的代码来写..

首先在sqlmap.config中启用缓存

<setting cacheModelsEnabled="true"/>

然后新建一个xml:CacheAccount.xml

并在sqlmap.config中的sqlMaps节点配置

<sqlMaps>
   <sqlMap resource="Maps/Account.xml"/>
   <sqlMap resource="Maps/CacheAccount.xml"/>
</sqlMaps>

新建立的CacheAccount.xml如下

<?xml version="1.0" encoding="utf-8" ?>

<sqlMap namespace="CacheAccount" xmlns="http://ibatis.apache.org/mapping" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

  <!--

  implementation="MEMORY"是设置缓存的实现方式，可以指定LRU、FIFO等，有点类似于内存的页替换策略。MEMORY是最常使用的一种方式。

  flushOnExecute设置的是当执行了这些语句时更新缓存  readOnly="false" serialize="true"

  -->

  <cacheModels>

    <cacheModel id="account-cache"  implementation="MEMORY" >

      <flushInterval hours="24"/>

      <flushOnExecute  statement="Account.sql_InsertOne"/>

      <!--<flushOnExecute  statement="sql_Delete"/>-->

      <flushOnExecute  statement="CacheAccount.sql_update"/>

      <property name="Type" value="Weak"/>

    </cacheModel>

  </cacheModels>

  <resultMaps>

    <resultMap id="Account-result"  class="Account">

      <result property="Id"    column="id"/>

      <result property="Item"    column="Item"/>

      <result property="Year"    column="Year"/>

      <result property="Month"    column="Month"/>

      <result property="Day"    column="Day"/>

      <result property="CreateOn"    column="CreateOn"/>

      <result property="Level"    column="Level"/>

    </resultMap>

  </resultMaps>

  <statements>

    <select id="sql_CacheSelect" resultMap="Account-result" cacheModel="account-cache" >

      select * from Accounts

    </select>

    <delete id="sql_Delete" parameterClass="int">

      delete from Accounts

      <dynamic prepend="where">

        <isParameterPresent property="id" prepend="">

          [id] = #id#

        </isParameterPresent>

      </dynamic>

    </delete>

    <update id="sql_update" parameterClass="Account">

      update Accounts set Item = #Item#

      where id = #Id#

    </update>

  </statements>

</sqlMap>