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}
007 * object.
008 */
009@FunctionalInterface
010public interface CloudEventsFunction {
011  /**
012   * Called to service an incoming event. This interface is implemented by user code to provide the
013   * action for a given background function. If this method throws any exception (including any
014   * {@link Error}) then the HTTP response will have a 500 status code.
015   *
016   * @param event the event.
017   * @throws Exception to produce a 500 status code in the HTTP response.
018   */
019  void accept(CloudEvent event) throws Exception;
020}