Global CORS Configuration and maven clean install

Author: SwarnadeepGhosh

.gitignore

@@ -18,6 +18,7 @@ target/
 *.iws
 *.iml
 *.ipr
+*.class
 
 ### NetBeans ###
 /nbproject/private/
@@ -28,6 +29,7 @@ target/
 build/
 !**/src/main/**/build/
 !**/src/test/**/build/
+/target/classes/
 
 ### VS Code ###
 .vscode/

.project

@@ -25,4 +25,15 @@
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 	</natures>
+	<filteredResources>
+		<filter>
+			<id>1655235843440</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
 </projectDescription>

CourseAPI-Spring-Starter.md

@@ -1196,3 +1196,40 @@ import org.springframework.cache.annotation.CacheEvict;
 ...
 ```
 
+
+
+
+
+### Spring Batch
+
+Spring Batch is a lightweight, comprehensive framework designed to facilitate the development of robust batch applications.
+
+Task - Copying data , Transfering files, Generate Reports
+
+**Main Task - Run and schedule Jobs**
+
+**Steps** 
+
+1. So to implement batching in a spring application we first create a job. A job is comprised of multiple steps each step is comprised of **ItemReader**, **ItemProcessor**, ItemWriter. Then Optionally you can also create a **JobListener**.
+
+   Step
+
+   - ItemReader
+
+   - ItemProcessor
+
+   - ItemWriter
+
+2. Once we have these all these will be stored in a job repository by spring batch automatically.
+
+3. So the job launcher is responsible for taking the job and executing it when required.
+
+4. Once you have all these in place, you create a job using the **job builder factory** into the job builder factory you tell- What is the step.
+
+5. to create a step itself, You use a **step builder factory**.
+
+6. Then we use a database it will store all these details the job details the step details in the database and we use a **JobLauncher** from Spring Batch to run a particular job. 
+
+7.  you configure all these items reader item processor item reader and the step and job in a Java based configuration file (BatchConfig) . it will create all these beans inside.
+
+8. you can pass parameters using an object called Job parameters if you want to pass in any additional data to the job itself.

logs/application.log

@@ -0,0 +1,20 @@
+package com.swarna.courseapi.config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class CorsConfig implements WebMvcConfigurer{
+
+    @Value("${frontendURL}")
+	private String frontendURL;
+
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        // WebMvcConfigurer.super.addCorsMappings(registry);
+        registry.addMapping("/**").allowedOrigins(frontendURL)
+        .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS");
+    }
+}

logs/application.log.2022-06-15.0.gz

@@ -2,7 +2,9 @@
 
 import java.util.List;
 import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
 
+@Repository
 public interface CourseRepository extends CrudRepository<Course, String> {
 
 	/* getAllTopics() 

src/main/java/com/swarna/courseapi/config/CorsConfig.java

@@ -1,5 +1,7 @@
 server.port=8080
 spring.main.allow-bean-definition-overriding=true
+frontendURL=http://localhost:4200
+# frontendURL=
 
 #Spring Data JPA config
 #update means directly change in db while I run application

src/main/java/com/swarna/courseapi/course/CourseRepository.java

@@ -1,5 +1,7 @@
 server.port=8080
 spring.main.allow-bean-definition-overriding=true
+frontendURL=http://localhost:4200
+# frontendURL=
 
 #Spring Data JPA config
 #update means directly change in db while I run application

src/main/resources/application.properties

@@ -9,6 +9,7 @@ com\swarna\courseapi\course\CourseRepository.class
 com\swarna\courseapi\lesson\Lesson$LessonBuilder.class
 com\swarna\courseapi\topic\Topic.class
 com\swarna\courseapi\lesson\LessonRepository.class
+com\swarna\courseapi\config\CorsConfig.class
 com\swarna\courseapi\course\CourseService.class
 com\swarna\courseapi\lesson\Lesson.class
 com\swarna\courseapi\lesson\LessonService.class

target/CourseAPI-Spring-Starter-0.0.1-SNAPSHOT.jar

@@ -1,15 +1,16 @@
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\CourseApiApp.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\lesson\LessonRepository.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\topic\Topic.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\topic\TopicRepository.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\course\CourseRepository.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\lesson\Lesson.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\course\Course.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\lesson\LessonService.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\lesson\LessonController.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\course\CourseController.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\topic\TopicService.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\hello\HelloController.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\course\CourseService.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\config\CacheConfig.java
-E:\My-Projects\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\topic\TopicController.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\topic\TopicRepository.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\config\CacheConfig.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\course\CourseController.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\lesson\LessonService.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\topic\TopicService.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\course\CourseRepository.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\config\CorsConfig.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\topic\Topic.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\CourseApiApp.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\course\CourseService.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\hello\HelloController.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\course\Course.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\lesson\LessonController.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\lesson\Lesson.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\lesson\LessonRepository.java
+e:\My-Projects\CourseAPI-fullstack\CourseAPI-Spring-Starter\src\main\java\com\swarna\courseapi\topic\TopicController.java