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broker.go
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broker.go
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/*
* Copyright (c) 2019 TFG Co <backend@tfgco.com>
* Author: TFG Co <backend@tfgco.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package feedback
import (
"encoding/json"
"sync"
"github.com/topfreegames/go-gcm"
"github.com/topfreegames/pusher/interfaces"
"github.com/topfreegames/pusher/structs"
"github.com/sideshow/apns2"
log "github.com/sirupsen/logrus"
"github.com/spf13/viper"
)
// Message is a struct that will decode an apns or gcm feedback message.
type Message struct {
From string `json:"from"`
MessageID string `json:"message_id"`
MessageType string `json:"message_type"`
Error string `json:"error"`
ErrorDescription string `json:"error_description"`
DeviceToken string `json:"DeviceToken"`
ID string `json:"id"`
Err map[string]interface{} `json:"Err"`
Metadata map[string]interface{} `json:"metadata"`
Reason string `json:"reason"`
}
// Broker receives kafka messages in its InChan, unmarshal them according to the
// platform and routes them to the correct out channel after examining their content.
type Broker struct {
StatsReporters []interfaces.StatsReporter
Logger *log.Logger
Config *viper.Viper
InChan chan QueueMessage
pendingMessagesWG *sync.WaitGroup
InvalidTokenOutChan chan *InvalidToken
stopChannel chan struct{}
InvalidTokenEnabled bool
run bool
}
// NewBroker creates a new Broker instance
func NewBroker(
logger *log.Logger, cfg *viper.Viper, statsReporters []interfaces.StatsReporter,
inChan chan QueueMessage,
pendingMessagesWG *sync.WaitGroup,
) (*Broker, error) {
b := &Broker{
Logger: logger,
Config: cfg,
StatsReporters: statsReporters,
InChan: inChan,
pendingMessagesWG: pendingMessagesWG,
stopChannel: make(chan struct{}),
}
b.configure()
return b, nil
}
func (b *Broker) loadConfigurationDefaults() {
b.Config.SetDefault("feedbackListeners.broker.invalidTokenChan.size", 1000)
b.Config.SetDefault("feedbackListeners.broker.invalidTokenEnabled", true)
}
func (b *Broker) configure() {
b.loadConfigurationDefaults()
b.InvalidTokenEnabled = b.Config.GetBool("feedbackListeners.broker.invalidTokenEnabled")
b.InvalidTokenOutChan = make(chan *InvalidToken, b.Config.GetInt("feedbackListeners.broker.invalidTokenChan.size"))
}
// Start starts a routine to process the Broker in channel.
func (b *Broker) Start() {
l := b.Logger.WithField(
"method", "start",
)
l.Info("starting broker")
b.run = true
go b.processMessages()
}
// Stop stops all routines from processing the in channel and closes all output channels.
func (b *Broker) Stop() {
b.run = false
close(b.stopChannel)
close(b.InvalidTokenOutChan)
}
func (b *Broker) processMessages() {
l := b.Logger.WithField(
"method", "processMessages",
)
for b.run {
select {
case msg, ok := <-b.InChan:
if ok {
switch msg.GetPlatform() {
case APNSPlatform:
var res structs.ResponseWithMetadata
err := json.Unmarshal(msg.GetValue(), &res)
if err != nil {
l.WithError(err).Error(ErrAPNSUnmarshal.Error())
}
b.routeAPNSMessage(&res, msg.GetGame())
case GCMPlatform:
var res gcm.CCSMessage
err := json.Unmarshal(msg.GetValue(), &res)
if err != nil {
l.WithError(err).Error(ErrGCMUnmarshal.Error())
}
b.routeGCMMessage(&res, msg.GetGame())
}
b.confirmMessage()
}
case <-b.stopChannel:
break
}
}
l.Info("stop processing Broker's in channel")
}
func (b *Broker) routeAPNSMessage(msg *structs.ResponseWithMetadata, game string) {
switch msg.Reason {
case apns2.ReasonBadDeviceToken, apns2.ReasonUnregistered, apns2.ReasonTopicDisallowed, apns2.ReasonDeviceTokenNotForTopic:
if b.InvalidTokenEnabled {
tk := &InvalidToken{
Token: msg.DeviceToken,
Game: game,
Platform: APNSPlatform,
}
b.InvalidTokenOutChan <- tk
}
}
}
func (b *Broker) routeGCMMessage(msg *gcm.CCSMessage, game string) {
switch msg.Error {
case "DEVICE_UNREGISTERED", "BAD_REGISTRATION":
if b.InvalidTokenEnabled {
tk := &InvalidToken{
Token: msg.From,
Game: game,
Platform: GCMPlatform,
}
b.InvalidTokenOutChan <- tk
}
}
}
func (b *Broker) confirmMessage() {
if b.pendingMessagesWG != nil {
b.pendingMessagesWG.Done()
}
}