在 mybatis 中缓存查询——可能的方法

Question

I have many queries written in mybatis. What are possible ways to cache answers ? For example, SELECT * FROM someFun(#{someId}) or SELECT count(*) FROM someFun(#{someId})

In other words, I search for way which cache only these queries which I would like to cache (something like annotations, maybe?) Of course, caching should depend on parameters, eq the some queries in XML , but with different parameters should be newly recomputed, for example:

SELECT count(*) FROM someFun(2) -- compute
SELECT count(*) FROM someFun(2) -- cache
SELECT count(*) FROM someFun(2) -- cache
SELECT count(*) FROM someFun(3) -- compute
SELECT count(*) FROM someFun(2) -- cache
SELECT count(*) FROM someFun(3) -- cache

....
10 minuts
....
SELECT count(*) FROM someFun(3) -- compute
SELECT count(*) FROM someFun(2) -- compute
SELECT count(*) FROM someFun(3) -- cache
SELECT count(*) FROM someFun(2) -- cache

Any ideas ?

Answer 1

You can choose which queries to cache as well as interval for when you want your cache to flush .

Both options are documented. Look for useCache on select and flushInterval on cache

Answer 2

You can use MyBatis 3 cache service. Just add the below tag in your mapper file.

<cache/>

You can customize the way your cache operates. In your case if you want your cache to flush after 10 minutes add the following code in your mapper file.

<cache flushInterval="60000"/>

There are other customization options available which you can check at MyBatis Cache