update to SpringBoot 3 and Java 17 (ExpediaGroup#1638)

### 📝 Description

SpringBoot v3 requires Java 17. This PR updates target bytecode of ALL `graphql-kotlin` modules to Java 17 and as a result ibrary users will have to use Java 17+ as well.

### 🔗 Related Issues
* Resolves ExpediaGroup#1609

Author: dariuszkuc

.github/workflows/build-examples.yml

@@ -17,10 +17,10 @@ jobs:
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@v1
 
-      - name: Set up Java 11
+      - name: Set up Java 17
         uses: actions/setup-java@v3
         with:
-          java-version: 11
+          java-version: 17
           distribution: 'zulu'
 
       - name: Set up Gradle cache

.github/workflows/build-libraries.yml

@@ -14,10 +14,10 @@ jobs:
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@v1
 
-      - name: Set up Java 11
+      - name: Set up Java 17
         uses: actions/setup-java@v3
         with:
-          java-version: 11
+          java-version: 17
           distribution: 'zulu'
 
       - name: Set up Gradle cache

.github/workflows/federation-compatibility.yml

@@ -20,10 +20,10 @@ jobs:
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@v1
 
-      - name: Set up Java 11
+      - name: Set up Java 17
         uses: actions/setup-java@v3
         with:
-          java-version: 11
+          java-version: 17
           distribution: 'zulu'
 
       - name: Set up Gradle cache

.github/workflows/federation-composition.yml

@@ -14,10 +14,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Set up Java 11
+      - name: Set up Java 17
         uses: actions/setup-java@v3
         with:
-          java-version: 11
+          java-version: 17
           distribution: 'zulu'
 
       - name: Set up Gradle cache

.github/workflows/plugin-it.yml

@@ -15,10 +15,10 @@ jobs:
       - uses: actions/checkout@v3
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@v1
-      - name: Set up Java 11
+      - name: Set up Java 17
         uses: actions/setup-java@v3
         with:
-          java-version: 11
+          java-version: 17
           distribution: 'zulu'
       - name: Set up Gradle cache
         uses: gradle/gradle-build-action@v2
@@ -36,10 +36,10 @@ jobs:
       - uses: actions/checkout@v3
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@v1
-      - name: Set up Java 11
+      - name: Set up Java 17
         uses: actions/setup-java@v3
         with:
-          java-version: 11
+          java-version: 17
           distribution: 'zulu'
       - name: Set up Gradle cache
         uses: gradle/gradle-build-action@v2

.github/workflows/pr-check-federation.yml

@@ -6,6 +6,7 @@ on:
       - master
     paths:
       - 'generator/graphql-kotlin-federation/**'
+      - 'integration/federation-compatibility/**'
 
 jobs:
   federation-compatibility:

.github/workflows/release-code.yml

@@ -15,10 +15,10 @@ jobs:
 
       - uses: gradle/wrapper-validation-action@v1
 
-      - name: Set up Java 11
+      - name: Set up Java 17
         uses: actions/setup-java@v3
         with:
-          java-version: 11
+          java-version: 17
           distribution: 'zulu'
 
       - name: Build library with Gradle

buildSrc/src/main/kotlin/com.expediagroup.graphql.conventions.gradle.kts

@@ -19,9 +19,13 @@ plugins {
 // see https://github.com/gradle/gradle/issues/15383#issuecomment-779893192
 val libs = the<LibrariesForLibs>()
 tasks {
+    kotlin {
+        jvmToolchain(17)
+    }
     val kotlinJvmVersion: String by project
     withType<KotlinCompile> {
         kotlinOptions {
+            // intellij gets confused without it
             jvmTarget = kotlinJvmVersion
             freeCompilerArgs = listOf("-Xjsr305=strict")
         }
@@ -53,12 +57,6 @@ tasks {
         // NOTE: in order to run gradle and maven plugin integration tests we need to have our build artifacts available in local repo
         finalizedBy("publishToMavenLocal")
     }
-    java {
-        // even though we don't have any Java code, since we are building using Java LTS version,
-        // this is required for Gradle to set the correct JVM versions in the module metadata
-        targetCompatibility = JavaVersion.VERSION_1_8
-        sourceCompatibility = JavaVersion.VERSION_1_8
-    }
 
     // published sources and javadoc artifacts
     val jarComponent = project.components.getByName("java")

examples/buildSrc/src/main/kotlin/com.expediagroup.graphql.examples.conventions.gradle.kts

@@ -27,9 +27,9 @@ dependencies {
     testImplementation(libs.junit.engine)
 }
 
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
+tasks.withType<KotlinCompile> {
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = "17"
         freeCompilerArgs = listOf("-Xjsr305=strict")
     }
 }
@@ -39,6 +39,9 @@ tasks {
         toolVersion = libs.versions.detekt.get()
         config = files(File(rootDir.parent, "detekt.yml").absolutePath)
     }
+    kotlin {
+        jvmToolchain(17)
+    }
     ktlint {
         version.set(libs.versions.ktlint.core.get())
     }

examples/server/spring-server/src/main/kotlin/com/expediagroup/graphql/examples/server/spring/exceptions/ValidationException.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021 Expedia, Inc
+ * Copyright 2023 Expedia, Inc
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
 
 package com.expediagroup.graphql.examples.server.spring.exceptions
 
-import javax.validation.ConstraintViolation
+import jakarta.validation.ConstraintViolation
 
 class ValidationException(val constraintErrors: List<ConstraintError>) : RuntimeException("Validation error")