001package com.google.cloud.functions;
002
003import io.cloudevents.CloudEvent;
004
005/**
006 * Represents a Cloud Function that is activated by an event and parsed into a {@link CloudEvent} object.
007 */
008@FunctionalInterface
009public interface CloudEventsFunction {
010  /**
011   * Called to service an incoming event. This interface is implemented by user code to
012   * provide the action for a given background function. If this method throws any exception
013   * (including any {@link Error}) then the HTTP response will have a 500 status code.
014   *
015   * @param event the event.
016   * @throws Exception to produce a 500 status code in the HTTP response.
017   */
018  void accept(CloudEvent event) throws Exception;
019}