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submission_producer.go
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submission_producer.go
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// InfoMark - a platform for managing courses with
// distributing exercise sheets and testing exercise submissions
// Copyright (C) 2019 ComputerGraphics Tuebingen
// Authors: Patrick Wieschollek
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package app
import (
"github.com/infomark-org/infomark-backend/service"
"github.com/spf13/viper"
)
// Producer is interface to pipe the workload over AMPQ to the backend workers
type Producer interface {
Publish(body []byte) error
}
// DefaultSubmissionProducer is the producer which broadcasts all submissions
// amongst the workers.
var DefaultSubmissionProducer Producer
// VoidProducer acts like a real producer, but will not trigger any background worker
// if you do not need these or within tests
type VoidProducer struct{}
// Publish of VoidProducer does nothing on purpose (used in unit tests).
func (t *VoidProducer) Publish(body []byte) error { return nil }
func InitSubmissionProducer() {
var err error
cfg := &service.Config{
Connection: viper.GetString("rabbitmq_connection"),
Exchange: "infomark-worker-exchange",
ExchangeType: "direct",
Queue: "infomark-worker-submissions",
Key: viper.GetString("rabbitmq_key"),
Tag: "SimpleSubmission",
}
if viper.GetBool("use_backend_worker") {
DefaultSubmissionProducer, err = service.NewProducer(cfg)
if err != nil {
panic(err)
}
} else {
DefaultSubmissionProducer = &VoidProducer{}
}
}