mirror of https://github.com/knative/docs.git
55 lines
1.5 KiB
JavaScript
55 lines
1.5 KiB
JavaScript
const got = require('got');
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const { CloudEvent, Emitter, emitterFor } = require('cloudevents');
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const K_SINK = process.env['K_SINK'];
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K_SINK || logExit('Error: K_SINK Environment variable is not defined');
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console.log(`Sink URL is ${K_SINK}`);
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const source = 'urn:event:from:heartbeat/example';
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const type = 'heartbeat.example';
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let eventIndex = 0;
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setInterval(() => {
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console.log(`Emitting event # ${++eventIndex}`);
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// Create a new CloudEvent each second
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const event = new CloudEvent({ source, type, data: {'hello': `World # ${eventIndex}`} });
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// Emits the 'cloudevent' Node.js event application-wide
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event.emit();
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}, 1000);
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// Create a function that can post an event
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const emit = emitterFor(event => {
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got.post(K_SINK, event)
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.then(response => {
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console.log('Event posted successfully');
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console.log(response.data);
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})
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.catch(err => {
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console.log('Error during event post');
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console.error(err);
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});
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});
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// Send the CloudEvent any time a Node.js 'cloudevent' event is emitted
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Emitter.on('cloudevent', emit);
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registerGracefulExit();
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function registerGracefulExit() {
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process.on('exit', logExit);
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//catches ctrl+c event
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process.on('SIGINT', logExit);
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process.on('SIGTERM', logExit);
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// catches 'kill pid' (for example: nodemon restart)
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process.on('SIGUSR1', logExit);
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process.on('SIGUSR2', logExit);
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}
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function logExit(message = 'Exiting...') {
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// Handle graceful exit
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console.log(message);
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process.exit();
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}
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