Bael 5543 - Running a spring boot app without DB (#12339)

* BAEL-5543 - Running a spring boot app without db

* BAEL-5543 - Adding authentication properties

* BAEL-5543 - Moving to a new module

* BAEL-5543 - Changing test class name

* BAEL-5543 - Reducing Java version

Co-authored-by: Abhinav Pandey <Abhinav2.Pandey@airtel.com>

spring-boot-modules/pom.xml

@@ -77,6 +77,7 @@
         <module>spring-boot-actuator</module>
         <module>spring-boot-data-2</module>
         <module>spring-boot-validation</module>
+        <module>spring-boot-data-3</module>
     </modules>
 
     <dependencyManagement>

spring-boot-modules/spring-boot-data-3/README.md

@@ -0,0 +1 @@
+### Relevant Articles:

spring-boot-modules/spring-boot-data-3/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <artifactId>spring-boot-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+    <groupId>com.baeldung</groupId>
+    <artifactId>spring-boot-data-3</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-boot-data-3</name>
+    <description>spring-boot-data-3</description>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

spring-boot-modules/spring-boot-data-3/src/main/java/com/baeldung/startwithoutdb/StartWithoutDbApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.startwithoutdb;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class StartWithoutDbApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(StartWithoutDbApplication.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-data-3/src/main/resources/application.properties

@@ -0,0 +1,7 @@
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+spring.datasource.url=jdbc:mysql://localhost:3306/myDb
+spring.datasource.username=root
+spring.datasource.password=root
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
+spring.jpa.hibernate.ddl-auto=none
+spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults=false

spring-boot-modules/spring-boot-data-3/src/test/java/com/baeldung/startwithoutdb/StartWithoutDbIntegrationTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.startwithoutdb;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.sql.DataSource;
+
+@SpringBootTest(classes = StartWithoutDbApplication.class)
+class StartWithoutDbIntegrationTest {
+
+    @Autowired
+    private ApplicationContext context;
+
+    @Test
+    public void givenAutoConfigDisabled_whenStarting_thenNoAutoconfiguredBeansInContext() {
+        context.getBean(DataSource.class);
+    }
+
+
+}