Merge branch 'feature/Bean_Scopes_and_Lifecycle_Methods' into develop

Author: DESKTOP-BL7US23\architbiet

src/com/luv2code/springdemo/AnnotationDemoApp.java

@@ -11,6 +11,14 @@ public static void main(String[] args) {
 
 // Retrieve the bean from Spring container
  Coach coach = context.getBean("tennisCoach", Coach.class);
+ Coach otherCoach = context.getBean("tennisCoach", Coach.class);
+
+ System.out.println("---------------Scope Testing-------------------");
+ boolean result = (coach == otherCoach);
+ System.out.println("Pointing to the same object : " + result);
+ System.out.println("Memory location of coach : " + coach);
+ System.out.println("Memory location of otherCoach : " + otherCoach);
+ System.out.println("---------------Scope Testing-------------------");
 
 // Call methods on the bean
  System.out.println(coach.getDailyWorkout());

src/com/luv2code/springdemo/TennisCoach.java

@@ -1,13 +1,15 @@
 package com.luv2code.springdemo;
 
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Scope;
 import org.springframework.stereotype.Component;
 
 /**
  * @Component - To find Spring within the component scan that which classes are beans
  * thatSillyCoach - bean id
  */
 @Component
+@Scope("prototype")
 public class TennisCoach implements Coach {
 
  @Autowired

src/notes.txt

@@ -0,0 +1,31 @@
+Spring main class steps:
+ 1. Define/Read the Spring config file = (container) = (context)
+ 2. Retrieve the bean(s) from Spring container
+ 3. Call method(s) on the bean
+ 4. Close the context
+
+
+Bean Scopes refer to lifecycle of a bean:
+ - How long the bean lives
+ - How many instances are created
+ - How is the bean shared
+
+Default Scope of Spring bean is SINGLETON (shared reference to the same bean)
+ PROTOTYPE (different references to different beans)
+
+Bean Lifecycle
+ - Add any method to the bean class
+ - Annotate those with @PostConstruct
+ @PreDestroy
+
+
+Spring Annotations
+ -> @Component - To find Spring within the component scan package that which classes are beans
+ Can also provide explicit bean id @Component("theBean")
+
+ -> @Autowired - To let Spring find the bean implementation(s) of FortuneService
+ Selects the appropriate candidate with the help of @Qualifier
+ Creates the bean and automatically injects at (Contructor, Setter, Method, Field)
+ -> @Scope - Defines bean scope (Default:Singleton)
+ -> @PostConstruct - Bean lifecycle
+ -> @PreDestroy - Bean lifecycle