Spring Component Scanning

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/birds/BirdsExplicitScan.java

@@ -0,0 +1,10 @@
+package io.reflectoring.birds;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan
+public class BirdsExplicitScan {
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/birds/Eagle.java

@@ -0,0 +1,8 @@
+package io.reflectoring.birds;
+
+import org.springframework.stereotype.Component;
+
+@Component
+class Eagle {
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/birds/Sparrow.java

@@ -0,0 +1,8 @@
+package io.reflectoring.birds;
+
+import org.springframework.stereotype.Component;
+
+@Component
+class Sparrow {
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/componentscan/BeanViewer.java

@@ -0,0 +1,21 @@
+package io.reflectoring.componentscan;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Component;
+
+@Component
+public class BeanViewer {
+	
+	private final Logger LOG = LoggerFactory.getLogger(getClass());
+	
+	@EventListener
+	public void showBeansRegistered(ApplicationReadyEvent event) {
+		String[] beanNames = event.getApplicationContext().getBeanDefinitionNames();
+		for(String beanName: beanNames) {
+			LOG.info("{}", beanName);
+		}
+	}
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/componentscan/ExplicitScan.java

@@ -0,0 +1,18 @@
+package io.reflectoring.componentscan;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.FilterType;
+
+import io.reflectoring.vehicles.Car;
+
+@Configuration
+@ComponentScan(basePackages= "io.reflectoring.vehicles", 
+includeFilters=@ComponentScan.Filter(type=FilterType.ASSIGNABLE_TYPE, classes=Car.class)
+, useDefaultFilters=false
+// Uncomment next line and comment out include filter to checkout exclude filter
+//excludeFilters=@ComponentScan.Filter(type=FilterType.ASSIGNABLE_TYPE, classes=Car.class)
+)
+public class ExplicitScan {
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/componentscan/SpringComponentScanningApplication.java

@@ -0,0 +1,17 @@
+package io.reflectoring.componentscan;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Import;
+
+import io.reflectoring.birds.BirdsExplicitScan;
+
+@SpringBootApplication
+@Import(value= {BirdsExplicitScan.class})
+public class SpringComponentScanningApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SpringComponentScanningApplication.class, args);
+	}
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/componentscan/UserService.java

@@ -0,0 +1,8 @@
+package io.reflectoring.componentscan;
+
+import org.springframework.stereotype.Service;
+
+@Service
+class UserService {
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/vehicles/Car.java

@@ -0,0 +1,5 @@
+package io.reflectoring.vehicles;
+
+public class Car {
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/vehicles/Hyundai.java

@@ -0,0 +1,8 @@
+package io.reflectoring.vehicles;
+
+import org.springframework.stereotype.Component;
+
+@Component
+class Hyundai extends Car {
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/vehicles/SpaceX.java

@@ -0,0 +1,8 @@
+package io.reflectoring.vehicles;
+
+import org.springframework.stereotype.Component;
+
+@Component
+class SpaceX {
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/vehicles/Tesla.java

@@ -0,0 +1,8 @@
+package io.reflectoring.vehicles;
+
+import org.springframework.stereotype.Component;
+
+@Component
+class Tesla extends Car {
+
+}

spring-boot/spring-component-scanning/src/main/java/io/reflectoring/vehicles/Train.java

@@ -0,0 +1,8 @@
+package io.reflectoring.vehicles;
+
+import org.springframework.stereotype.Component;
+
+@Component
+class Train {
+
+}

spring-boot/spring-component-scanning/src/main/resources/application.properties

@@ -0,0 +1 @@
+

spring-boot/spring-component-scanning/src/test/java/io/reflectoring/componentscan/SpringComponentScanningApplicationTests.java

@@ -0,0 +1,13 @@
+package io.reflectoring.componentscan;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class SpringComponentScanningApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}