Getting null value from #configuration - spring-boot

Question

I'm creating pojo class and store the application.properties variable but I'm getting null values
NOTE: need to access env from my Abstract class
POJO class
package mynt.xyz.c4.pushnotif.config;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
#Configuration("notificationEnvironment")
#ConfigurationProperties(prefix = "app.notif")
public class NotificationEnvironment {
private String key;
private String url;
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
}
Initializing class with #autowired
public abstract class NotificationBase {
#Autowired
NotificationEnvironment notificationEnvironment;
public void getEnv(){
system.out.println(notificationEnvironment.getKey()); // null value
}
}
concrete class that extend to my NotificationBaseClass
#Component
#Qualifier("androidNotification")
public class AndroidNotification extends NotificationBase implements Notification {
public AndroidNotification(String message, String title, String datalink, List<String> instanceIds) {
super(message, title, datalink, instanceIds);
}
AndroidNotification(){
super();
}
#Override
public void send() {
this.getEnv();
}
}
application.properties
app.notif.key=jkashdkjashd
app.notif.url=https/some.url

Answer 1

You can auto wire #Configuration class from #Configuration class
#Configuration class may reference the instance of any other #Configuration class using #Autowired. This works because the #Configuration classes themselves are instantiated and managed as individual Spring beans.

Answer 2

Make your class #Component and add prefix value in #ConfigurationProperties, like this. This works for me, hope this works for you as well.
#Component
#ConfigurationProperties(prefix = "app.notif")
public class NotificationEnvironment {
private String key;
private String url;
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
}
You can use this properties like this:
#Component
public class NotificationBase {
private static NotificationEnvironment notificationEnvironment;
#Autowired
public NotificationBase(NotificationEnvironment notificationEnvironment){
this.notificationEnvironment = notificationEnvironment;
}
public static void getEnv(){
System.out.println(notificationEnvironment.getKey()); // null value
}
}

Answer 3

Here is the one of the concrete class definition as OP author mentioned.
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
#Component
public class ConcreteNotification extends NotificationBase {
#Autowired
public ConcreteNotification(NotificationEnvironment notificationEnvironment) {
super(notificationEnvironment);
}
}
updated NotificationBase as below
public abstract class NotificationBase {
NotificationEnvironment notificationEnvironment;
public NotificationBase(NotificationEnvironment notificationEnvironment) {
this.notificationEnvironment = notificationEnvironment;
}
public void getEnv(){
System.out.println(notificationEnvironment.getKey());
}
}
The controller class I am using to get configuration values
#RestController
public class ArticleCommentController {
#Autowired
ConcreteNotification concreteNotification;
#RequestMapping(value = "/health_check", method = RequestMethod.GET)
public void getDemo() {
concreteNotification.getEnv();
}
}
output:
jkashdkjashd