How to cause or emit a Rebound?

Description

The Rebound is in-build feature so all you have to do is use it in your component creation.

In order to cause a rebound you need to emit rebound event with a cause as a second argument. The cause may be an Error or a String with a description of the cause.

The basic principle and syntax could be written following examples presented here.

Causing Rebound in JavaScript code

Here is how to implement Rebound in Node.js code:

exports.process = processTrigger; function processTrigger(msg, cfg){ var that = this; that.emit('rebound', new Error('Rebound reason')); that.emit('end'); } 

Here is an example of Rebound feature usage in Commercetools component component action called addVariants:

function addVariant(productId, payload) { if (!productId) { console.log('No product with masterVariantSku %s found.', masterVariantSku); return self.emit('rebound', 'No product with masterVariantSku' + masterVariantSku + 'found.'); } function emitData(response) { self.emit('data', response.body); } return client.products .byId(productId) .update(payload) .then(emitData); } 

Causing Rebound in Java code

Here is how to implement the Rebound feature in the component code written in Java String:

package io.elastic.demo; import io.elastic.api.Component; import io.elastic.api.EventEmitter; import io.elastic.api.ExecutionParameters; public class ReboundingComponent extends Component { public ReboundingComponent(EventEmitter eventEmitter) { super(eventEmitter); } @Override public void execute(ExecutionParameters parameters) { this.getEventEmitter().emitRebound("Rebound for a reason!"); } } 

Here is how to do with Java Exception:

package io.elastic.demo; import io.elastic.api.Component; import io.elastic.api.EventEmitter; import io.elastic.api.ExecutionParameters; public class ReboundingReasonExceptionComponent extends Component{ public ReboundingReasonExceptionComponent(EventEmitter eventEmitter) { super(eventEmitter); } @Override public void execute(ExecutionParameters parameters) { this.getEventEmitter().emitRebound(new RuntimeException("Rebound")); } } 