001// Copyright 2019 Google LLC 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package com.google.cloud.functions; 016 017/** 018 * Represents a Cloud Function that is activated by an HTTP request. 019 */ 020@FunctionalInterface 021public interface HttpFunction { 022 /** 023 * Called to service an incoming HTTP request. This interface is implemented by user code to 024 * provide the action for a given function. If the method throws any exception (including any 025 * {@link Error}) then the HTTP response will have a 500 status code. 026 */ 027 void service(HttpRequest request, HttpResponse response) throws Exception; 028}