Provide properties to set the number of threads of spring TaskScheduler

[m11y]

By default, it use Executors.newSingleThreadScheduledExecutor() to create executor, and it only have one thread.
But when I config the executor manually:

    @Bean
    public ConcurrentTaskScheduler taskScheduler() {
        ConcurrentTaskScheduler taskScheduler = new ConcurrentTaskScheduler();
        taskScheduler.setScheduledExecutor(executorService());
        return taskScheduler;
    }

    @Bean
    public ScheduledExecutorService executorService() {
        ScheduledExecutorFactoryBean bean = new ScheduledExecutorFactoryBean();
        bean.setThreadNamePrefix("schedule");
        bean.setPoolSize(10);
        return bean.getObject();
    }

Exception occurs:

Exception in thread "main" java.lang.IllegalStateException: More than one TaskScheduler and/or ScheduledExecutorService  exist within the context.

[m11y]

When I config as follow:

    @Bean
    public ScheduledExecutorFactoryBean executorService() {
        ScheduledExecutorFactoryBean bean = new ScheduledExecutorFactoryBean();
        bean.setThreadNamePrefix("schedule-");
        bean.setPoolSize(10);
        return bean;
    }

It, works.
However, is there any convenient way to config executor pool size. like:

spring.datasource.max-active: 20

to config:

spring.scheduling.poolSize: 20

[snicoll]

There is no explicit scheduling support in Spring boot if that's what your question is. Are you saying we should provide an easier way to configure the executor service used by @EnableScheduling?

[m11y]

@snicoll yes, my English is very poor.

[philwebb]

Duplicates #1563.

[snicoll]

That's not a duplicate of #1563 - #1563 is about TaskExecutor and this one is about TaskScheduler. Those are two completely separate contracts.