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hello.go
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hello.go
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/*
* 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 action
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
fmt.Println(output.Greetings)
return json.Marshal(output)
}
return nil, fmt.Errorf("no name specified")
}