import ballerina/http;

+ @http:ServiceConfig {
+    basePath: "/api"
+ }
service hello on new http:Listener(9090) {
+     @http:ResourceConfig {
+         methods: ["POST"],
+         path: "/say"
+     }
    resource function sayHello(http:Caller caller, http:Request request) {
        http:Response response = new;
        response.setTextPayload("Hello Ballerina!");
        _ = caller -> respond(response);
    }
}