Ballerina May 2026

type Person record string name; int age; string email?; // optional field ; Person p = name: "Alice", age: 30 ; Arrays & Maps int[] numbers = [1, 2, 3]; map<string> colors = red: "#FF0000", green: "#00FF00" ; 5. Services & Listeners A service is a collection of remote methods (resources) attached to a listener (e.g., HTTP listener). HTTP Service Example import ballerina/http; service /api on new http:Listener(9090) resource function get greeting(string name) returns string return "Hello, " + name;

Ballerina uses strands – lightweight threads managed by the runtime. Use start , wait , and isolated functions. ballerina

(inside a function):

curl http://localhost:9090/api/greeting/John Call external services using built-in clients. type Person record string name; int age; string email