Fix code generation warning (#408)

Author: slinkydeveloper

sdk-api-gen-common/build.gradle.kts

@@ -11,4 +11,7 @@ dependencies {
 
   api("com.github.jknack:handlebars:4.3.1")
   api(project(":sdk-common"))
+
+  // We need it to silence the slf4j warning (coming from handlebars)
+  runtimeOnly("org.slf4j:slf4j-nop:1.7.32")
 }

sdk-api-gen/build.gradle.kts

@@ -11,7 +11,6 @@ dependencies {
   compileOnly(coreLibs.jspecify)
 
   implementation(project(":sdk-api-gen-common"))
-
   implementation(project(":sdk-api"))
 
   testAnnotationProcessor(project(":sdk-api-gen"))

sdk-api-gen/src/main/java/dev/restate/sdk/gen/ServiceProcessor.java

@@ -38,6 +38,11 @@ public class ServiceProcessor extends AbstractProcessor {
   private static final Set<String> RESERVED_METHOD_NAMES =
       Set.of("send", "submit", "workflowHandle");
 
+  @Override
+  public SourceVersion getSupportedSourceVersion() {
+    return SourceVersion.RELEASE_17;
+  }
+
   @Override
   public synchronized void init(ProcessingEnvironment processingEnv) {
     super.init(processingEnv);