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functions.go
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functions.go
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/*
* Copyright 2019 InfAI (CC SES)
*
* Licensed 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 publisher
import (
"context"
"encoding/json"
"errors"
"github.com/SENERGY-Platform/models/go/models"
"github.com/segmentio/kafka-go"
"log"
"runtime/debug"
"time"
)
type FunctionCommand struct {
Command string `json:"command"`
Id string `json:"id"`
Owner string `json:"owner"`
Function models.Function `json:"function"`
//field has been removed but can still exist as value in kafka
//StrictWaitBeforeDone bool `json:"strict_wait_before_done"`
}
func (this *Publisher) PublishFunction(function models.Function, userId string) (err error) {
cmd := FunctionCommand{Command: "PUT", Id: function.Id, Function: function, Owner: userId}
return this.PublishFunctionCommand(cmd)
}
func (this *Publisher) PublishFunctionDelete(id string, userId string) error {
cmd := FunctionCommand{Command: "DELETE", Id: id, Owner: userId}
return this.PublishFunctionCommand(cmd)
}
func (this *Publisher) PublishFunctionCommand(cmd FunctionCommand) error {
if this.config.LogLevel == "DEBUG" {
log.Println("DEBUG: produce function", cmd)
}
if cmd.Owner == "" {
return errors.New("missing owner in command")
}
message, err := json.Marshal(cmd)
if err != nil {
debug.PrintStack()
return err
}
err = this.functions.WriteMessages(
context.Background(),
kafka.Message{
Key: []byte(cmd.Id),
Value: message,
Time: time.Now(),
},
)
if err != nil {
debug.PrintStack()
}
return err
}