Add ci.yml for matrix builds on Java/OS

* Add test-specific `javaLauncher` configuration based
on the `testJavaVersion` project property propagated
from the mentioned `ci.yml`
* Upgrade `gradle.toolchains` to `1.0.0`
* Upgrade `Mockito` to `1.0.0`
* Fix Kotlin compile Gradle tasks to target Java `17`

Author: artembilan

.github/workflows/ci.yml

@@ -0,0 +1,28 @@
+name: CI
+
+on:
+  workflow_dispatch:
+
+  push:
+    branches:
+      - main
+      - '*.x'
+
+concurrency:
+  group: group-ci-for-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  ci:
+    strategy:
+      fail-fast: false
+      matrix:
+        testJavaVersion: [ 17, 21, 25 ]
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-gradle-ci.yml@main
+    with:
+      testJavaVersion: ${{ matrix.testJavaVersion }}
+      runner: ${{ matrix.os }}
+    secrets:
+      DEVELOCITY_ACCESS_KEY: ${{ secrets.DEVELOCITY_ACCESS_KEY }}

build.gradle

@@ -85,7 +85,7 @@ ext {
     mailVersion = '2.0.5'
     micrometerTracingVersion = '1.5.10'
     micrometerVersion = '1.15.10'
-    mockitoVersion = '5.17.0'
+    mockitoVersion = '5.18.0'
     mongoDriverVersion = '5.5.2'
     mysqlVersion = '9.3.0'
     oracleVersion = '23.8.0.25.04'
@@ -245,11 +245,13 @@ configure(javaProjects) { subproject ->
         options.encoding = 'UTF-8'
     }
 
-    compileKotlin {
-        compilerOptions {
-            allWarningsAsErrors = true
-        }
-    }
+	tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompilationTask).configureEach {
+		compilerOptions {
+			jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
+			javaParameters = true
+			allWarningsAsErrors = true
+		}
+	}
 
     tasks.withType(JavaCompile).configureEach {
         options.fork = true
@@ -344,7 +346,14 @@ configure(javaProjects) { subproject ->
         reports.junitXml.required = false
 
         enableAssertions = false
-    }
+
+		javaLauncher = javaToolchains.launcherFor {
+			languageVersion = JavaLanguageVersion.of(project.findProperty('testJavaVersion') ?: 17)
+		}
+
+        jvmArgs '-Xshare:off',
+				'--enable-native-access=ALL-UNNAMED'
+	}
 
     checkstyle {
         configDirectory.set(rootProject.file('src/checkstyle'))

settings.gradle

@@ -7,7 +7,7 @@ pluginManagement {
 
 plugins {
 	id 'io.spring.develocity.conventions' version '0.0.25'
-	id 'org.gradle.toolchains.foojay-resolver-convention' version '0.9.0'
+	id 'org.gradle.toolchains.foojay-resolver-convention' version '1.0.0'
 }
 
 rootProject.name = 'spring-integration'