#Bean configuration of #Scheduled components - spring

Question

First time looking at Spring - and I have a question regarding configuration of a bean that I also would like to schedule.
Using Spring Boot, I've created a Application class, and a TaskClass that I would both like to Schedule and configure using a configuration class.
Application Class
#SpringBootApplication
#EnableScheduling
#ComponentScan("mmmi.pdws.cetrea")
public class Application {
public static void main(String[] args) {
SpringApplication.run(PdwsBackend.class, args); //Leftover from Boot project
ApplicationContext ctx = new AnnotationConfigApplicationContext(AppConfig.class);
taskClass task = ctx.getBean(taskClass.class);
}
}
TaskClass
#Component
public class TaskClass {
private String taskName;
#Scheduled(fixedRate=1000)
public void lifeSign(){
System.out.println("My name is " + taskName);
}
public void setName(String name){this.name = name}
}
AppConfig class
#Configuration
public class AppConfig {
#Bean
public TaskClass taskClass(){
TaskClass task = new TaskClass();
task.setName("SpringTask");
return task;
}
}
The instantiated object from the Scheduler and from the AppConfig class are naturally not the same...but is there a way to configure the Scheduled object?
Looking at Springs scheduling reference it seems to be doable with XML configuration? But what if I would like to do it with a Java configuration class?

Answer 1

If the value that you want to set is constant, you can put it in your application.properties file and inject it to using the #Value annotation directly into the scheduler bean.
application.properties
task.name=SpringTask
TaskClass
#Component
public class TaskClass {
private final String taskName;
public TaskClass(#Value("${task.name}") String taskName) {
this.taskName = taskName;
}
#Scheduled(fixedRate=1000)
public void lifeSign(){
System.out.println("My name is " + taskName);
}
public void setName(String name){this.name = name}
}
You can also inject the value directly to the field if you don't like constructor injection.
Of course the bean declared in the AppConfig is redundant since the TaskClass is annotated with #Component and will be found by #ComponentScan.

Answer 2

From the same spring ref link, you can read the following:
Make sure that you do not use #Configurable on bean classes which are annotated with #Scheduled and registered as regular Spring beans with the container: You would get double initialization otherwise, once through the container and once through the #Configurable aspect.
What you can do is simply use #PostConstruct method (called only once after bean creation) in your TaskClass to set taskName as shown below and then you don't need your AppConfig class:
#Component
public class TaskClass {
private String taskName;
#Postconstruct
public void init() {
taskName= "SpringTask";
}
#Scheduled(fixedRate=1000)
public void lifeSign(){
System.out.println("My name is " + taskName);
}
public void setName(String name){this.name = name}
}