From 862adc8f4122672353a5f6a26ec774d311b27e99 Mon Sep 17 00:00:00 2001
From: raj44444 <raj_44444@outlook.com>
Date: Wed, 24 Dec 2025 06:05:22 +0530
Subject: [PATCH 1/4] Upgrade to Java 21 and Spring Boot 2.7.12

---
 pom.xml     | 15 ++++++++++++---
 rewrite.yml |  6 ++++++
 2 files changed, 18 insertions(+), 3 deletions(-)
 create mode 100644 rewrite.yml

diff --git a/pom.xml b/pom.xml
index 323aef3..a111a21 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.3.5.RELEASE</version>
+		<version>2.7.12</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
@@ -18,9 +18,9 @@
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-		<java.version>1.8</java.version>
+		<java.version>21</java.version>
 		<tomcat.version>9.0.43</tomcat.version>
-		<spring-security.version>5.4.4</spring-security.version>
+		<spring-security.version>5.7.8</spring-security.version>
 	</properties>
 
 	<dependencies>
@@ -54,6 +54,15 @@
 
 	<build>
 		<plugins>
+			<!-- Ensure compilation uses Java 21 -->
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>3.11.0</version>
+				<configuration>
+					<release>21</release>
+				</configuration>
+			</plugin>
 			<plugin>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
diff --git a/rewrite.yml b/rewrite.yml
new file mode 100644
index 0000000..a18721a
--- /dev/null
+++ b/rewrite.yml
@@ -0,0 +1,6 @@
+type: specs.openrewrite.org/v1beta/recipe
+name: com.devsecops.upgrade-java-21
+displayName: Upgrade to Java 21 and Spring Boot 2.7
+recipeList:
+  - org.openrewrite.java.spring.boot2.UpgradeSpringBoot_2_7
+  - org.openrewrite.java.migrate.UpgradeToJava21

From 99add6e08c3743a2a489a3674654a7dac6cca34a Mon Sep 17 00:00:00 2001
From: raj44444 <raj_44444@outlook.com>
Date: Wed, 24 Dec 2025 06:06:40 +0530
Subject: [PATCH 2/4] Convert tests to JUnit 5 (NumericApplicationTests)

---
 src/test/java/com/devsecops/NumericApplicationTests.java | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/test/java/com/devsecops/NumericApplicationTests.java b/src/test/java/com/devsecops/NumericApplicationTests.java
index 71397a2..53e391a 100644
--- a/src/test/java/com/devsecops/NumericApplicationTests.java
+++ b/src/test/java/com/devsecops/NumericApplicationTests.java
@@ -1,7 +1,7 @@
 package com.devsecops;
 
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
 import org.springframework.boot.test.context.SpringBootTest;
@@ -22,11 +22,11 @@
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 //import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
 
-@RunWith(SpringRunner.class)
+@ExtendWith(SpringExtension.class)
 @SpringBootTest
 @AutoConfigureMockMvc
 public class NumericApplicationTests {

From 5485a5e9dd82be11cc1527434ec2fd2f2e7825dc Mon Sep 17 00:00:00 2001
From: raj44444 <raj_44444@outlook.com>
Date: Wed, 24 Dec 2025 06:10:49 +0530
Subject: [PATCH 3/4] Upgrade springdoc-openapi-ui to 1.6.14 to fix bean
 creation issues

---
 pom.xml                                                  | 2 +-
 src/test/java/com/devsecops/NumericApplicationTests.java | 6 +-----
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/pom.xml b/pom.xml
index a111a21..6038156 100644
--- a/pom.xml
+++ b/pom.xml
@@ -43,7 +43,7 @@
 		<dependency>
 			<groupId>org.springdoc</groupId>
 			<artifactId>springdoc-openapi-ui</artifactId>
-			<version>1.2.30</version>
+			<version>1.6.14</version>
 		</dependency>
 		
 		<dependency>
diff --git a/src/test/java/com/devsecops/NumericApplicationTests.java b/src/test/java/com/devsecops/NumericApplicationTests.java
index 53e391a..5458027 100644
--- a/src/test/java/com/devsecops/NumericApplicationTests.java
+++ b/src/test/java/com/devsecops/NumericApplicationTests.java
@@ -1,6 +1,5 @@
 package com.devsecops;
 
-
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
@@ -45,14 +44,11 @@ public void greaterThanFiftyMessage() throws Exception {
         this.mockMvc.perform(get("/compare/51")).andDo(print()).andExpect(status().isOk())
                 .andExpect(content().string("Greater than 50"));
     }
-    
-    
 
-@Test
+    @Test
     public void welcomeMessage() throws Exception {
         this.mockMvc.perform(get("/")).andDo(print()).andExpect(status().isOk())
                 .andExpect(content().string("Kubernetes DevSecOps"));
     }
-    
 
 }
\ No newline at end of file

From 7ddc4cfb325b7c2c7f6990b0b033b07754e19e44 Mon Sep 17 00:00:00 2001
From: raj44444 <raj_44444@outlook.com>
Date: Wed, 24 Dec 2025 06:19:03 +0530
Subject: [PATCH 4/4] Code migration completed: Upgrade to Java 21 and Spring
 Boot 2.7.12

---
 rewrite.yml | 6 ------
 1 file changed, 6 deletions(-)
 delete mode 100644 rewrite.yml

diff --git a/rewrite.yml b/rewrite.yml
deleted file mode 100644
index a18721a..0000000
--- a/rewrite.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-type: specs.openrewrite.org/v1beta/recipe
-name: com.devsecops.upgrade-java-21
-displayName: Upgrade to Java 21 and Spring Boot 2.7
-recipeList:
-  - org.openrewrite.java.spring.boot2.UpgradeSpringBoot_2_7
-  - org.openrewrite.java.migrate.UpgradeToJava21