[WSO2 Integration Summit Nairobi 2019] Ballerina - Cloud Native Programming Language that Makes it Easy to Write Microservices that Integrate APIs
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The document discusses the Ballerina programming language, designed for easily writing microservices and integrations in a disaggregated environment with many endpoints. It highlights key components such as service definitions, network-aware types, endpoints, and integration capabilities with cloud-native platforms like Docker and Kubernetes. The text emphasizes the importance of agile development and provides resources for further involvement and support.
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![JSON
json is just a union - () | int | float | string | map<json> | json[]
// JSON object
json payload = { "orderdata" : { "id": 1, "name": "XYZ", "price": 2500 } };
//Access object values
json orderid = payload.orderdata.id;
//JSON arrays
json orders = {
"orderdata" : [
{ "id": 1, "name": "XYZ", "price": 2500 },
{ "id": 2, "name": "ABC", "price": 3000 }
]
};](https://image.slidesharecdn.com/wso2integrationsummitnairobi2019-ballerinacloudnativeprogramminglanguagethatmakesiteasytowritemicros-190529060136/85/WSO2-Integration-Summit-Nairobi-2019-Ballerina-Cloud-Native-Programming-Language-that-Makes-it-Easy-to-Write-Microservices-that-Integrate-APIs-19-320.jpg)
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[WSO2 Integration Summit Nairobi 2019] Ballerina - Cloud Native Programming Language that Makes it Easy to Write Microservices that Integrate APIs
- 1. Cloud Native Programming Language that Makes it Easy to Write Microservices that Integrate APIs Anupama Pathirage April 2019
- 2. Increasing demand is causing disaggregation
- 3. Everything is An Endpoint Functions APIs Data SaaS apps Legacy apps Devices Disaggregation leads to more endpoints
- 4. Integration in an increasingly disaggregated world Transactions Circuit Breaking Protocols Payloads Events Security Workflow Streams Compensation
- 5. ESB, BPMN, EAI Java / Spring JavaScript / Node
- 6. The Integration Gap ESB, BPMN, EAI Java / Spring JavaScript / Node
- 8. Microservice with RESTful API
- 11. ● Endpoints: - Listener endpoints - For incoming network interactions - Protocols - HTTP/S - HTTP2 - GRPC - WebSocket - JMS .. - Client endpoints - For outgoing network interactions - HTTP. WebSub, GRPC - Database, FTP - Twitter, Salesforce Endpoints
- 12. ● Service is a collection of resources where each resource is network invokable via ingress endpoints ● Services must be attached to an endpoint to be invoked Services and Resources
- 13. Endpoints and Services ...
- 15. Basic types and other types ○ Simple types ○ (), boolean, int, float, decimal, string ○ Structured types ○ tuple, array, map, record, table, xml ○ Behavioral types ○ error, function, future, object, stream, typedesc
- 16. Basic types and other types ○ Other types ○ Unions ○ Optional ○ json ○ byte ○ anydata ○ any
- 17. Union types ○ Type defined by union of two or more other types ○ Remember, a type is name for a set of values float | string v1 = "John"; float | string v2 = 457.68; float | string 0.51 1.01 457.68 -11.0 “John” “name” “” “bal” // The return type of 'post' is a union of 'http:Response' and 'error' http:Response | error response = orderEP -> post("/create", reqPayload)
- 18. XML // Simple XML literal xml x1 = xml`<name>Pol Katta</name>`; // XML with namespaces xmlns "http://wso2.com" as ns0; xml x2 = xml `<name id="123" status="single"> <ns0:fname>Pol</ns0:fname> <ns0:lname>Katta</ns0:lname> </name>`; // XML literal with interpolation string lastName = "Katta"; xml x3 = xml`<lname>${lastName}</lname>`; // Concat XML values xml x4 = x1 + x2 + x3;
- 19. JSON json is just a union - () | int | float | string | map<json> | json[] // JSON object json payload = { "orderdata" : { "id": 1, "name": "XYZ", "price": 2500 } }; //Access object values json orderid = payload.orderdata.id; //JSON arrays json orders = { "orderdata" : [ { "id": 1, "name": "XYZ", "price": 2500 }, { "id": 2, "name": "ABC", "price": 3000 } ] };
- 20. Sequence Diagram
- 23. ● Ballerina natively understand Cloud Native platforms like Docker, Kubernetes and Istio. ● Ballerina removes gap between developers and Ops. ● Ballerina support agile development to deployment and improve productivity. Takeaways
- 24. How to get involved Learn more Open source Get support http://ballerina.io http://github.com/ballerina-platform/ Ballerina Dev Google Group Ballerina Slack Channel Stack Overflow #ballerina tag
- 25. THANK YOU