Spring @Scheduler parallel running
<p>I have the following 3 classes:</p>

<p><em>ComponantA</em></p>

<pre><code>package mytest.spring.test.spring;

import org.apache.log4j.Logger;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class ComponentA {

    Logger log = Logger.getLogger(ComponentB.class);

    @Scheduled(fixedRate=2000)
    public void sayHello() {
        for(int i=1 ; i&lt;=5 ; i++) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            log.info("Hello from ComponentA " + i);
        }
    }
}
</code></pre>

<p><em>ComponentB</em></p>

<pre><code>package mytest.spring.test.spring;

import org.apache.log4j.Logger;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class ComponentB {

    Logger log = Logger.getLogger(ComponentB.class);

    @Scheduled(fixedRate=2000)
    public void sayHello() {
        for(int i=1 ; i&lt;=3 ; i++) {
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            log.info("Hello from ComponentB " + i);
        }
    }
}
</code></pre>

<p><em>MyApplication</em></p>

<pre><code>package mytest.spring.test.spring;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;

@SpringBootApplication
@EnableScheduling
public class MyApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}
</code></pre>

<p>When I execute it, I'm getting the following output:</p>

<pre><code>Hello from ComponentA 1
Hello from ComponentA 2
Hello from ComponentA 3
Hello from ComponentA 4
Hello from ComponentA 5
Hello from ComponentB 1
Hello from ComponentB 2
Hello from ComponentB 3
Hello from ComponentA 1
Hello from ComponentA 2
Hello from ComponentA 3
Hello from ComponentA 4
Hello from ComponentA 5
Hello from ComponentB 1
Hello from ComponentB 2
Hello from ComponentB 3
...
</code></pre>

<p>I need the 2 Scheduled methods to run in parallel, which is clearly not the cae according to the output I'm getting. I read that it should be possible to provide the @Schedule annotation with a custom TaskExecutor, with which it should be possible to define how many thread we want ...</p>

<p>Am I right ? I can't find how to provide this information.</p>