Strange situation with #Autowired - spring

Question

I have strange situation with #Autowired
App's main class:
#Configuration
#EnableAutoConfiguration
#SpringBootApplication
#ComponentScan({"khartn", "khartn.torrentsuploader.processor"})
public class NewMain implements CommandLineRunner {
public static void main(String[] args) {
SpringApplicationBuilder builder = new SpringApplicationBuilder(NewMain.class);
builder.headless(false);
ConfigurableApplicationContext context = builder.run(args);
}
#Override
public void run(String... args) throws Exception {
}
}
Component class:
#Component("MyDirectoryReader")
public class MyDirectoryReader {
public MyDirectoryReader ( ) {
System.out.println("qqqqqqqqqqqqqqq");
}
public void readDir() {
try {
String initialPathStr = NewJFrame.jTextField1.getText();
System.out.println("initialPathStr " + initialPathStr);
Path dir = FileSystems.getDefault().getPath(initialPathStr);
DirectoryStream<Path> stream = Files.newDirectoryStream(dir, "*.{torrent}");
for (Path path : stream) {
System.out.println(path.getFileName());
}
stream.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
When application starting, I see, what MyDirectoryReader class is initialized:
2015-04-11 21:42:29.405 INFO 9375 --- [.NewMain.main()] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext#13d6044f: startup date [Sat Apr 11 21:42:29 SAMT 2015]; root of context hierarchy
qqqqqqqqqqqqqqq
Config class:
#Configuration
#ComponentScan({"khartn", "khartn.torrentsuploader.processor"})
public class AppConfig {
#Bean(initMethod = "init")
public NewJFrame mainForm() {
System.out.println("init mainForm");
return new NewJFrame();
}
}
And in NewJFrame class have autowired field
public class NewJFrame extends javax.swing.JFrame {
#Autowired
#Qualifier(value = "MyDirectoryReader")
MyDirectoryReader myDirectoryReader;
But when NewJFrame showed and button pressed,
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
if (myDirectoryReader == null) {
System.out.println("myDirectoryReader is null");
}
// myDirectoryReader.readDir();
}
then myDirectoryReader is null.
Why MyDirectoryReader is initialized as Component, but not autowired to the field?

Answer 1

According to the code from the init method, you make the call new NewJFrame().setVisible(true);, however, when you create an object yourself, Spring doesn't know that and autowiring doesn't work. You have to use the Spring bean object itself. I think, if you change that line to this.setVisible(true), it should work correctly (since the init method is executed when the bean is instantiated).