将“缓存Redis过期"设置为1年 [英] Set Cache Redis Expiration to 1 year

问题描述

如何将Redis缓存的有效期设置为1年?

How to set Redis Cache expiration to 1 year?

我尝试将xml配置上的 long 值设置为: 31556952000 (1年)，但随后捕获到一个异常，该异常是Integer类型无法识别值作为整数.我尝试在Google上进行搜索，结果显示Integer最大值不超过 2147483647 ，这意味着，如果设置为该最大值，则我的缓存只会在24天后过期.

I tried to set the long value on the xml configuration to : 31556952000 (1 year), but then it caught an exception that type Integer doesn't recognize the value as Integer. I tried to search at Google, and it says that Integer maximum value is up to 2147483647, which means, if I set to that maximum value, I only get my cache expires on 24 days.

这是我的 applicationContext.xml (我省略了不必要的代码):

Here is my applicationContext.xml (I omitted unnecessary code) :

    ...
    <cache:annotation-driven />

    <bean id="redisCacheMap" class="java.util.HashMap">
        <constructor-arg index="0" type="java.util.Map">
            <map key-type="java.lang.String" value-type="java.lang.Integer">
                <entry key="ruleCache" value="86400"/>
            </map>
        </constructor-arg>
    </bean>
    ...

上面的代码配置为将 ruleCache 的到期时间设置为仅1天(86400以毫秒为单位).

The code above is configured to set the expiration of ruleCache to only 1 day (86400 in ms).

有可能这样做吗?谢谢.

Is it possible to do that? Thanks.

推荐答案

Redis接受expire命令的整数值(最大为2147483647).单位是秒，而不是毫秒，因此1年是31556952，而不是31556952000，并且它适合整数.

Redis accepts integer value (maximum is up to 2 147 483 647) for expire command. The unit is second, not ms, so 1 year is 31556952 instead of 31556952000, and it fits into integer.

如果您希望地图访问Long，也许您可​​以修改配置:

If you want your map to access Long, maybe you can adapt your config:

<map key-type="java.lang.String" value-type="java.lang.Long">

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