SpringBoot Super Scheduled: Dynamic Management and Enhancement of @Scheduled Tasks

SpringBoot‑Super‑Scheduled is a starter that enhances native SpringBoot @Scheduled tasks by providing dynamic management capabilities while remaining fully compatible with the original @Scheduled annotation.

Function description : It allows runtime control of scheduled jobs, such as modifying cron expressions, fixed delays, or fixed rates, and supports manual execution and termination.

Quick use : Add the dependency to your project:

<dependency>
    <groupId>com.github.guoyixing</groupId>
    <artifactId>spring-boot-starter-super-scheduled</artifactId>
    <version>0.3.1</version>
</dependency>

Configure the starter and obtain the source code from Gitee or GitHub.

Implementation principle :

1. Configuration management – a SuperScheduledConfig bean stores task metadata, thread pool, and mappings between task names and their runtime objects.

2. Post‑processor interception – a SuperScheduledPostProcessor implements BeanPostProcessor and ApplicationContextAware to scan beans for methods annotated with @Scheduled , capture their metadata into ScheduledSource , and disable the original scheduling by resetting annotation attributes.

@Component("superScheduledConfig")
public class SuperScheduledConfig { ... }

3. ApplicationRunner initialization – SuperScheduledApplicationRunner creates a SuperScheduledRunnable for each captured task, builds a chain of Point proxies (each representing a strengthening interceptor), and schedules the task using ThreadPoolTaskScheduler .

@Component
@Order
public class SuperScheduledApplicationRunner implements ApplicationRunner, ApplicationContextAware { ... }

4. Dynamic management – SuperScheduledManager provides APIs to modify cron, fixedDelay, or fixedRate at runtime, cancel existing tasks, and restart them with updated configurations.

public void setScheduledCron(String name, String cron) { ... }

5. Strengthening interface – BaseStrengthen defines before, after, exception, and afterFinally hooks. Implementations are proxied via CGLIB ( RunnableBaseInterceptor ) and linked into a Chain to form an invocation pipeline.

public interface BaseStrengthen { void before(...); void after(...); void exception(...); void afterFinally(...); }

6. Task execution – SuperScheduledRunnable executes the chain of strengtheners; when the chain is exhausted, it invokes the original method via reflection.

public Object invoke() { ... }

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