Heritage is slowing the startup of my SPRING BOOT application

Question

I’m working on an automatic text messaging system, in my class hierarchy I have an abstract class at the top called TaskNFSBusiness which sets the rules for messages that are not in real time, it is annotated with @Component as you can see below:

@Component
public abstract class TaskNFSBusiness {

Soon after I have a class that inherits from this class and defines the rules of messages that will be sent in real time its declaration is being made as follows:

public abstract class NFSInstantanea extends TaskNFSBusiness implements PageQueryConstants {

Just below the hierarchy I have 2 classes that inherit from NFSInstantanea and define the rules of instant messaging, they are stated as follows:

@Component
@Qualifier("nfs13")
public class NFS13 extends NFSInstantanea {

@Component
@Qualifier("nfs12")
public class NFS12 extends NFSInstantanea  {

My problem is that these last two classes are increasing Spring boot time too much because they both inherit from NFSInstantanea and both are marked with @Component, this is generating a timeout at the time of uploading the application to the local test server. The strange thing is that if I remove the @Component of the classes or if I make them inherit from TaskNFSBusiness boot time goes back to normal, only I didn’t want to do it because then I wouldn’t be able to instill NFS12 and the NFS13 with @Autowired, and if I put the real-time methods in TaskNFSBusiness I will end up having a series of useless code in messages that are not instant, plus all the conflicts that this would cause.

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To make it simpler to understand the hierarchy I’ll leave the modeling right below

Answer 1

To prevent a component from initializing during startup (it got weird to write this), you can use the annotation @Lazy as follows:

@Lazy
@Component
@Qualifier("nfs13")
public class NFS13 extends NFSInstantanea {
...
}

To work, you must inject it using obligatory @Autowired as follows:

@Autowired
@Qualifier("nfs13")
private NFSInstantanea minhaInstancia;

Or declaring as a @Bean:

@Lazy
@Bean
public NFSInstantanea nfs13() {
    return new NFS13();
}

More information on documentation

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Edit:

I forgot to mention, problems during application startup may be related to poorly optimized routines, which are executed during instance creation.

Optimizing routines is highly recommended, rather than "using a technical outline" to make the application work.