Ballerina is a specialized language for writing integration solutions. This presentation is about the connectors in Ballerina and how they can be used to build solutions.

1. Associate Technical Lead, WSO2
Ballerina Connectors for
Seamless Integration
Maheeka Jayasuriya

2. Connectors for Integration
• Integration is dynamic
• Convenient and fast
• Adaptive and seamless

3. • Easy and fast integration
• Hide complexity of direct
API access
• Simple and clean API invocations
Abstraction of a Connector

4. “A connector represents a participant in
the integration and is used to interact
with an external system or a service
that’s defined in Ballerina.”
Ballerina Connectors

5. “An action is an operation you can execute against a
connector. It represents a single interaction with a
participant of the integration.”
Actions in Ballerina Connectors

6. Visualizing Connectors

7. • Server connectors
• Client connectors
Ballerina Connector Types

8. • Connector as a server
– HTTP(s), WebSocket
– JMS, File, IO
Server Connector

9. HTTP Server Connector

10. Invoking the HTTP Service

11. Client Connector
• Connector as a client
– HTTP(s), WebSocket
– Salesforce, Twitter
– JMS, File, SQL

12. HTTP Client Connector

13. API Connectors

14. Writing a Connector

15. Ballerina Twitter Client Connector
https://github.com/ballerinalang/connectors/blob/master/twitter/src/org/wso2/
ballerina/connectors/twitter/ClientConnector.bal

16. Defining a Connector

17. Defining Actions

18. Twitter API: Tweet
https://developer.twitter.com/en/docs/tweets/post-and-engage/api-reference/post-statuses-update

19. Defining Tweet Action

20. Defining Tweet Action

21. Using the Twitter Connector

22. Further with connectors ...

23. Endpoint Declaration

24. Endpoint Declaration
Base Connector

25. Endpoint Declaration
Binding Connections

26. • Timeout
• Retry
• Circuit Breaker
Resiliency with Ballerina

27. • Connecting systems
• Data transformations
Connector Integrations

28. • Complexity of direct invocation
• Simple and fast
• Readily available connectors
• Frequency of access
When to Use a Connector?

29. wso2.com