Spring inicial, APUNTES, MASTER CLASS, CRACKING SPRING LAST VERSION Part2

 Spring inicial, APUNTES, MASTER CLASS, CRACKING SPRING LAST VERSION Part2

funcion main(), que hace inyección mediante interfaz

ANTES

package com.in28minutes.spring.basics.springin5steps;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class SpringIn5StepsApplication {

   public static void main(String[] args) {

      BinarySearchImpl binarySearch =

            new BinarySearchImpl(new BubbleSortAlgorithm());

      int result = binarySearch.binarySearch(new int[] { 12, 4, 6 }, 3);

      System.out.println(result);

   }

}

CON MODIFICACION

import org.springframework.context.ApplicationContext;

@SpringBootApplication
public class SpringIn5StepsApplication {

   // What are the beans?
   // What are the dependencies of a bean?
   // Where to search for beans? => No need

   public static void main(String[] args) {

      // BinarySearchImpl binarySearch =
      // new BinarySearchImpl(new QuickSortAlgorithm());
      // Application Context
      ApplicationContext applicationContext = 
            SpringApplication.run(SpringIn5StepsApplication.class, args);
      BinarySearchImpl binarySearch = 
            applicationContext.getBean(BinarySearchImpl.class);
      int result = 
            binarySearch.binarySearch(new int[] { 12, 4, 6 }, 3);
      System.out.println(result);
   }

CON MODIFICACION DE BEANS

ANTES

package com.in28minutes.spring.basics.springin5steps;

public class  BinarySearchImpl {
   private SortAlgorithm sortAlgorithm;
   public BinarySearchImpl(SortAlgorithm sortAlgorithm) {
      super();
      this.sortAlgorithm = sortAlgorithm;
   }
   public int binarySearch(int[] numbers, int numberToSearchFor) {
      int[] sortedNumbers = sortAlgorithm.sort(numbers);
      System.out.println(sortAlgorithm);
      // Search the array
      return 3;
   }

}

DESPUES:

VEMOS CLARAMENTE ANOTACION COMPONENT Y AUTOWIRED DONDE SE VA A INJECTAR EL BEAN O LA DEPENDENCIA

package com.in28minutes.spring.basics.springin5steps;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class BinarySearchImpl {

   @Autowired
   private SortAlgorithm sortAlgorithm;
   
   public int binarySearch(int[] numbers, int numberToSearchFor) {

      int[] sortedNumbers = sortAlgorithm.sort(numbers);
      System.out.println(sortAlgorithm);
      // Search the array
      return 3;
   }

}

ANTES

DESPUES

LA INTERFAZ NO CAMBIA COMO SE PUEDE APRECIAR

package com.in28minutes.spring.basics.springin5steps;

public interface SortAlgorithm {
   public int[] sort(int[] numbers);
}

ANTES

VEMOS CLARAMENTE ANOTACION COMPONENT

package com.in28minutes.spring.basics.springin5steps;

import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;

@Component
@Primary
public class BubbleSortAlgorithm implements SortAlgorithm {
   public int[] sort(int[] numbers) {
      // Logic for Bubble Sort
      return numbers;
   }
}

ANTES

package com.in28minutes.spring.basics.springin5steps;

import org.springframework.stereotype.Component;

@Component
public class QuickSortAlgorithm implements SortAlgorithm {
   public int[] sort(int[] numbers) {
      // Logic for Quick Sort
      return numbers;
   }
}

IMPORTANTE LOGING EN APPLOCATION PROPERTIES

logging.level.org.springframework = debug

LOG ANOTACIONES

Searching directory [/in28Minutes/git/getting-started-in-5-steps/spring-in-5-steps/target/classes/com/in28minutes/spring/basics/springin5steps] for files matching pattern [/in28Minutes/git/getting-started-in-5-steps/spring-in-5-steps/target/classes/com/in28minutes/spring/basics/springin5steps/**/*.class]
Identified candidate component class: file [/in28Minutes/git/getting-started-in-5-steps/spring-in-5-steps/target/classes/com/in28minutes/spring/basics/springin5steps/BinarySearchImpl.class]
Identified candidate component class: file [/in28Minutes/git/getting-started-in-5-steps/spring-in-5-steps/target/classes/com/in28minutes/spring/basics/springin5steps/BubbleSortAlgorithm.class]

Creating instance of bean 'binarySearchImpl'
Creating instance of bean 'bubbleSortAlgorithm'
Finished creating instance of bean 'bubbleSortAlgorithm'

Constuctor - Autowiring by type from bean name 'binarySearchImpl' via constructor 
to bean named 'bubbleSortAlgorithm'
Setter -  Autowiring by type from bean name 'binarySearchImpl' to bean named 'bubbleSortAlgorithm'
No Setter or Constructor - Autowiring by type from bean name 'binarySearchImpl' to bean named 'bubbleSortAlgorithm'


Finished creating instance of bean 'binarySearchImpl'

GIT IGNORE

target/
!.mvn/wrapper/maven-wrapper.jar

### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans

### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr

### NetBeans ###
nbproject/private/
build/
nbbuild/
dist/
nbdist/
.nb-gradle/