| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package hello |
| |
| import ( |
| "encoding/json" |
| "fmt" |
| "log" |
| ) |
| |
| // Hello receive an event in format |
| // { "name": "Mike"} |
| // and returns a greeting in format |
| // { "greetings": "Hello, Mike"} |
| func Hello(event json.RawMessage) (json.RawMessage, error) { |
| // input and output |
| var input struct { |
| Name string |
| } |
| var output struct { |
| Greetings string `json:"greetings"` |
| } |
| // read the input event |
| json.Unmarshal(event, &input) |
| if input.Name != "" { |
| // handle the event |
| output.Greetings = "Hello, " + input.Name |
| log.Println(output.Greetings) |
| return json.Marshal(output) |
| } |
| return nil, fmt.Errorf("no name specified") |
| } |