如何参数@Scheduled（FIXEDDELAY）使用Spring 3.0 EX pression语言？ [英] How to parameterize @Scheduled(fixedDelay) with Spring 3.0 expression language?

问题描述

在使用Spring 3.0功能注释计划任务，我想设置FIXEDDELAY从我的配置文件参数，而不是硬接线到我的任务类，像目前...

When using the Spring 3.0 capability to annotate a scheduled task, I would like to set the fixedDelay as parameter from my configuration file, instead of hard-wiring it into my task class, like currently...

@Scheduled(fixedDelay=5000)
public void readLog() {
        ...
}

不幸的是，似乎与春节前pression语言手段（EL）@Value返回一个字符串对象，又是不能够被自动装箱为所要求的参数FIXEDDELAY长期价值。

Unfortunately it seems that with the means of the Spring Expression Language (EL) @Value returns a String object which in turn is not able to be auto-boxed to a long value as required by the fixedDelay parameter.

预先感谢你对这个帮助。

Thanks in advance for your help on this.

推荐答案

我猜 @Scheduled 注释是毫无疑问的。因此，也许你的解决方案是使用任务调度<​​/ code> XML配置。让我们考虑这个例子（从<复制的href=\"http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/scheduling.html\">Spring DOC ）：

I guess the @Scheduled annotation is out of question. So maybe a solution for you would be to use task-scheduled XML configuration. Let's consider this example (copied from Spring doc):

<task:scheduled-tasks scheduler="myScheduler">
    <task:scheduled ref="someObject" method="readLog" 
               fixed-rate="#{YourConfigurationBean.stringValue}"/>
</task:scheduled-tasks>

...或者，如果从字符串投龙没有工作，像这样的：

... or if the cast from String to Long didn't work, something like this would:

<task:scheduled-tasks scheduler="myScheduler">
    <task:scheduled ref="someObject" method="readLog"
            fixed-rate="#{T(java.lang.Long).valueOf(YourConfigurationBean.stringValue)}"/>
</task:scheduled-tasks>

同样，我还没有尝试过任何这些设置的，但我希望它可以帮助你一点。

Again, I haven't tried any of these setups, but I hope it might help you a bit.

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