Upgrade from Java 8 to Java 11 (Spring Boot 2.7.18, Gradle 7.6.4)

README.md

@@ -1,5 +1,5 @@
 # springboot-java8
-The project is made on spring boot. The project summarize the new features present in Java 8.
+The project is made on spring boot (2.7.x, running on Java 11). The project summarize the new features present in Java 8.
 It contain list of harcoded topics list. You can call the apis's with POSTMAN to add,delete,update Topic list
 In addition, it uses 
 1) Java 8 NIO methods 
@@ -76,7 +76,7 @@ GET /datetime
 
 ### Prerequisites
 
-1) Java sdk
+1) Java 11 SDK (JDK 11+)
 2) POSTMAN
 
 ### Installing

build.gradle

@@ -3,7 +3,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath("org.springframework.boot:spring-boot-gradle-plugin:2.0.2.RELEASE")
+        classpath("org.springframework.boot:spring-boot-gradle-plugin:2.7.18")
     }
 }
 
@@ -14,19 +14,22 @@ apply plugin: 'org.springframework.boot'
 apply plugin: 'io.spring.dependency-management'
 
 bootJar {
-    baseName = 'gs-spring-boot'
-    version =  '0.1.0'
+    archiveBaseName = 'gs-spring-boot'
+    archiveVersion =  '0.1.0'
 }
 
 repositories {
     mavenCentral()
 }
 
-sourceCompatibility = 1.8
-targetCompatibility = 1.8
+sourceCompatibility = JavaVersion.VERSION_11
+targetCompatibility = JavaVersion.VERSION_11
 
 dependencies {
-    compile("org.springframework.boot:spring-boot-starter-web")
-    testCompile("junit:junit")
+    implementation("org.springframework.boot:spring-boot-starter-web")
+    implementation("org.springframework.boot:spring-boot-starter-jdbc")
+    runtimeOnly("com.h2database:h2")
+    runtimeOnly("org.springframework.boot:spring-boot-properties-migrator")
+    testImplementation("junit:junit")
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.4-bin.zip

pom.xml

@@ -5,13 +5,13 @@
 
     <groupId>org.springframework</groupId>
     <artifactId>gs-spring-boot</artifactId>
-    <packaging>pom</packaging>
+    <packaging>jar</packaging>
     <version>0.1.0</version>
 
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.2.RELEASE</version>
+        <version>2.7.18</version>
     </parent>
 
     <dependencies>
@@ -35,7 +35,7 @@
     </dependencies>
 
     <properties>
-        <java.version>1.8</java.version>
+        <java.version>11</java.version>
     </properties>
 
 

src/main/java/hello/Application.java

@@ -36,8 +36,12 @@ public static void main(String[] args) {
         }
 
         RestTemplate restTemplate =  new RestTemplate();
-        Quote quote = restTemplate.getForObject("http://gturnquist-quoters.cfapps.io/api/random", Quote.class);
-        log.info(quote.toString());
+        try {
+            Quote quote = restTemplate.getForObject("http://gturnquist-quoters.cfapps.io/api/random", Quote.class);
+            log.info(quote.toString());
+        } catch (Exception e) {
+            log.warn("Could not fetch quote from remote service: {}", e.getMessage());
+        }
     }
 
 
@@ -49,9 +53,13 @@ public RestTemplate restTemplate(RestTemplateBuilder builder) {
     @Bean
     public CommandLineRunner run(RestTemplate restTemplate) throws Exception {
         return args -> {
-            Quote quote = restTemplate.getForObject(
-                    "http://gturnquist-quoters.cfapps.io/api/random", Quote.class);
-            log.info(quote.toString());
+            try {
+                Quote quote = restTemplate.getForObject(
+                        "http://gturnquist-quoters.cfapps.io/api/random", Quote.class);
+                log.info(quote.toString());
+            } catch (Exception e) {
+                log.warn("Could not fetch quote from remote service: {}", e.getMessage());
+            }
         };
     }