Sample demonstrating usage of the GitHubWebhook service, introduced extending Ballerina's WebSub subscriber service.

github_webhook_service.bal

import ballerina/io;
import ballerina/http;
import ballerina/webhook;
import ballerina/websub;

endpoint webhook:GitHubListener githubListenerEP {
    host:"localhost",
    port:8181
};

@websub:SubscriberServiceConfig {
    basePath:"/githubWebhook",
    secret: "Kslk30SNF2AChs2"
}
service<webhook:GitHubService> githubWebhook bind githubListenerEP {

    onIssueCommentCreated (websub:NotificationRequest notification) {
        string notificationPayload = notification.payload.toString() but { () => "" };
        io:println("[onIssueCommentCreated] WebSub Notification Received: " + notificationPayload);
    }

    onIssueCommentEdited (websub:NotificationRequest notification) {
        string notificationPayload = notification.payload.toString() but { () => "" };
        io:println("[onIssueCommentEdited] WebSub Notification Received: " + notificationPayload);
    }

    onIssueCommentDeleted (websub:NotificationRequest notification) {
        string notificationPayload = notification.payload.toString() but { () => "" };
        io:println("[onIssueCommentDeleted] WebSub Notification Received: " + notificationPayload);
    }

    onIssuesEdited (websub:NotificationRequest notification) {
        string notificationPayload = notification.payload.toString() but { () => "" };
        io:println("[onIssuesEdited] WebSub Notification Received: " + notificationPayload);
    }

    onWatch (websub:NotificationRequest notification) {
        string notificationPayload = notification.payload.toString() but { () => "" };
        io:println("[onWatch] WebSub Notification Received: " + notificationPayload);
    }

}