Upgraded to Spring Boot 3.0.0

to get onto the latest major version of Spring Boot.

Jenkinsfile

@@ -11,10 +11,10 @@ pipeline {
 	}
 
 	stages {
-		stage("test: baseline (jdk8)") {
+		stage("test: baseline (jdk17)") {
 			agent {
 				docker {
-					image 'adoptopenjdk/openjdk8:latest'
+					image 'adoptopenjdk/openjdk17:latest'
 					args '-v $HOME/.m2:/tmp/jenkins-home/.m2'
 				}
 			}

complete/build.gradle

@@ -1,12 +1,12 @@
 plugins {
-	id 'org.springframework.boot' version '2.7.1'
-	id 'io.spring.dependency-management' version '1.0.11.RELEASE'
+	id 'org.springframework.boot' version '3.0.0'
+	id 'io.spring.dependency-management' version '1.1.0'
 	id 'java'
 }
 
 group = 'com.example'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '1.8'
+sourceCompatibility = '17'
 
 repositories {
 	mavenCentral()

complete/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.7.1</version>
+		<version>3.0.0</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>
@@ -14,7 +14,7 @@
 	<name>messaging-stomp-websocket-complete</name>
 	<description>Demo project for Spring Boot</description>
 	<properties>
-		<java.version>1.8</java.version>
+		<java.version>17</java.version>
 	</properties>
 	<dependencies>
 		<dependency>

complete/src/test/java/com/example/messagingstompwebsocket/GreetingIntegrationTests.java

@@ -13,7 +13,6 @@ import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.web.server.LocalServerPort;
 import org.springframework.messaging.converter.MappingJackson2MessageConverter;
 import org.springframework.messaging.simp.stomp.StompCommand;
 import org.springframework.messaging.simp.stomp.StompFrameHandler;
@@ -27,11 +26,12 @@ import org.springframework.web.socket.messaging.WebSocketStompClient;
 import org.springframework.web.socket.sockjs.client.SockJsClient;
 import org.springframework.web.socket.sockjs.client.Transport;
 import org.springframework.web.socket.sockjs.client.WebSocketTransport;
+import org.springframework.beans.factory.annotation.Value;
 
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
 public class GreetingIntegrationTests {
 
-	@LocalServerPort
+	@Value(value="${local.server.port}")
 	private int port;
 
 	private SockJsClient sockJsClient;

initial/build.gradle

@@ -1,12 +1,12 @@
 plugins {
-	id 'org.springframework.boot' version '2.7.1'
-	id 'io.spring.dependency-management' version '1.0.11.RELEASE'
+	id 'org.springframework.boot' version '3.0.0'
+	id 'io.spring.dependency-management' version '1.1.0'
 	id 'java'
 }
 
 group = 'com.example'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '1.8'
+sourceCompatibility = '17'
 
 repositories {
 	mavenCentral()

initial/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.7.1</version>
+		<version>3.0.0</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>
@@ -14,7 +14,7 @@
 	<name>messaging-stomp-websocket-initial</name>
 	<description>Demo project for Spring Boot</description>
 	<properties>
-		<java.version>1.8</java.version>
+		<java.version>17</java.version>
 	</properties>
 	<dependencies>
 		<dependency>