Question

We use scheduled tasks in a Spring web application to send reminders, daily digests, etc.:

    <task:scheduled-tasks>
    <task:scheduled ref="fooService" method="bar" cron="0 0/5 * * * ?"/>
    </task:scheduled-tasks>

Each scheduled task invokes a given service method (fooService.bar() in the pseudocode above). I’d like to monitor how long each execution lasts. Some of these methods might take longer as load, data, or complexity increases. I can add logging statements to each service method (~10 now, but probably more in the future), or use aspects to put some stopwatch behavior around each method. But is there a more direct way to achieve this for all scheduled-tasks in spring?

Answer 1

You can use:

• perf4j – provides some aspects and a lot of statistical tools

• custom made aspectj aspect

• use built-in Spring: Standard Logging aspect (interceptor) – it can measure execution time with $[invocationTime] placeholder

In all of the solutions above you need to somehow distinguish which methods you want to track. You can take all methods of some interface, all methods annotated with some annotation (including custom one), use method naming convention…

Of course you must choose a solution that best fits your needs as the ultimate goal is to have monitoring without adding any external code.