mirror of
https://github.com/hexolan/panels.git
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77 lines
2.2 KiB
Go
77 lines
2.2 KiB
Go
// Copyright 2023 Declan Teevan
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package kafka
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import (
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"context"
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"github.com/rs/zerolog/log"
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"github.com/segmentio/kafka-go"
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"google.golang.org/protobuf/proto"
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"github.com/hexolan/panels/panel-service/internal"
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"github.com/hexolan/panels/panel-service/internal/rpc/panelv1"
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)
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type PanelEventProducer struct {
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writer *kafka.Writer
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}
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func NewPanelEventProducer(cfg internal.Config) PanelEventProducer {
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writer := &kafka.Writer{
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Addr: kafka.TCP(cfg.KafkaBrokers...),
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Topic: "panel",
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Balancer: &kafka.LeastBytes{},
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}
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return PanelEventProducer{writer: writer}
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}
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func (ep PanelEventProducer) SendEvent(event *panelv1.PanelEvent) {
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// Encode the protobuf event
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evtBytes, err := proto.Marshal(event)
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if err != nil {
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log.Panic().Err(err).Msg("failed to marshal event")
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}
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// Write to kafka
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err = ep.writer.WriteMessages(context.Background(), kafka.Message{Value: evtBytes})
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if err != nil {
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// todo: implement recovery method e.g. storing failed event dispatches on DB to send on recovery (such as from Kafka going offline)
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log.Panic().Err(err).Msg("failed to dispatch event")
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}
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}
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func (ep PanelEventProducer) DispatchCreatedEvent(panel internal.Panel) {
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go ep.SendEvent(&panelv1.PanelEvent{
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Type: "created",
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Data: panelv1.PanelToProto(&panel),
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})
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}
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func (ep PanelEventProducer) DispatchUpdatedEvent(panel internal.Panel) {
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go ep.SendEvent(&panelv1.PanelEvent{
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Type: "updated",
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Data: panelv1.PanelToProto(&panel),
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})
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}
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func (ep PanelEventProducer) DispatchDeletedEvent(id int64) {
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go ep.SendEvent(&panelv1.PanelEvent{
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Type: "deleted",
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Data: &panelv1.Panel{Id: internal.StringifyPanelId(id)},
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})
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}
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