#Scheduled and #Async are sharing same threadpool in spring-boot - spring-boot

Question

I have configured two different thread pools, one for #Scheduled and other for #Async. However, I notice that the thread-pool for #Async is not being used.
Here is the Scheduler configuration
#Configuration
#EnableScheduling
public class SchedulerConfig implements SchedulingConfigurer {
private final int POOL_SIZE = 10;
#Override
public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
threadPoolTaskScheduler.setPoolSize(POOL_SIZE);
threadPoolTaskScheduler.setThreadNamePrefix("my-sched-pool-");
threadPoolTaskScheduler.initialize();
scheduledTaskRegistrar.setTaskScheduler(threadPoolTaskScheduler);
}
}
Here is the Configuration for Async
#Configuration
#EnableAsync
public class AppConfig {
#Bean(name = "asyncTaskExecutor")
public TaskExecutor asyncExecutor() {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.setCorePoolSize(15);
executor.setMaxPoolSize(15);
executor.setQueueCapacity(100);
executor.setThreadNamePrefix("my-async-pool-");
executor.initialize();
return executor;
}
}
Here is how I invoke them
#Scheduled(fixedRateString = "2000" )
public void schedule() {
log.debug("here is the message from schedule");
asyncMethod();
}
#Async("asyncTaskExecutor")
public void asyncMethod(){
log.info("here is the message from async");
}
Here are the logs
{"thread":"my-sched-pool-1","level":"DEBUG","description":"here is the message from schedule"}
{"thread":"my-sched-pool-1","level":"INFO","description":"here is the message from async"}
As you can notice, both logs are having same pool of that scheduler. but I expect to see the second one to come from async

Answer 1

If you call #Async methods from the same class they are declared you are effectively bypassing Spring's proxy mechanism and that is why your example is not working. Try calling the method from a separate class annotated with #Service or any of the other #Component types.
#Service
SomeScheduledClass {
private final SomeAsyncClass someAsyncClass;
public SomeScheduledClass(SomeAsyncClass someAsyncClass) {
this.someAsyncClass = someAsyncClass;
}
#Scheduled(fixedRateString = "2000" )
public void schedule() {
log.debug("here is the message from schedule");
someAsyncClass.asyncMethod();
}
}
#Service
SomeAsyncClass {
#Async("asyncTaskExecutor")
public void asyncMethod(){
log.info("here is the message from async");
}
}