forked from HydroProtocol/hydro-scaffold-dex
/
engine.go
233 lines (191 loc) · 5.33 KB
/
engine.go
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package dex_engine
import (
"context"
"encoding/json"
"fmt"
"github.com/Purnachndar/hydro-scaffold-dex/backend/connection"
"github.com/Purnachndar/hydro-scaffold-dex/backend/models"
"github.com/Purnachndar/hydro-sdk-backend/common"
"github.com/Purnachndar/hydro-sdk-backend/engine"
"github.com/Purnachndar/hydro-sdk-backend/sdk/ethereum"
"github.com/Purnachndar/hydro-sdk-backend/utils"
"os"
"strings"
"sync"
)
type RedisOrderBookSnapshotHandler struct {
kvStore common.IKVStore
}
func (handler RedisOrderBookSnapshotHandler) Update(key string, bookSnapshot *common.SnapshotV2) sync.WaitGroup {
bts, err := json.Marshal(bookSnapshot)
if err != nil {
panic(err)
}
_ = handler.kvStore.Set(key, string(bts), 0)
return sync.WaitGroup{}
}
type RedisOrderBookActivitiesHandler struct {
}
func (handler RedisOrderBookActivitiesHandler) Update(webSocketMessages []common.WebSocketMessage) sync.WaitGroup {
for _, msg := range webSocketMessages {
if strings.HasPrefix(msg.ChannelID, "Market#") {
pushMessage(msg)
}
}
return sync.WaitGroup{}
}
type DexEngine struct {
// global ctx, if this ctx is canceled, queue handlers should exit in a short time.
ctx context.Context
// all redis queues handlers
marketHandlerMap map[string]*MarketHandler
eventQueue common.IQueue
// Wait for all queue handler exit gracefully
Wg sync.WaitGroup
HydroEngine *engine.Engine
}
func NewDexEngine(ctx context.Context) *DexEngine {
// init redis
redis := connection.NewRedisClient(os.Getenv("HSK_REDIS_URL"))
// init websocket queue
wsQueue, _ := common.InitQueue(
&common.RedisQueueConfig{
Name: common.HYDRO_WEBSOCKET_MESSAGES_QUEUE_KEY,
Ctx: ctx,
Client: redis,
},
)
InitWsQueue(wsQueue)
// init event queue
eventQueue, _ := common.InitQueue(
&common.RedisQueueConfig{
Name: common.HYDRO_ENGINE_EVENTS_QUEUE_KEY,
Client: redis,
Ctx: ctx,
})
e := engine.NewEngine(context.Background())
// setup handler for hydro engine
kvStore, _ := common.InitKVStore(&common.RedisKVStoreConfig{Ctx: ctx, Client: redis})
snapshotHandler := RedisOrderBookSnapshotHandler{kvStore: kvStore}
e.RegisterOrderBookSnapshotHandler(snapshotHandler)
activityHandler := RedisOrderBookActivitiesHandler{}
e.RegisterOrderBookActivitiesHandler(activityHandler)
engine := &DexEngine{
ctx: ctx,
eventQueue: eventQueue,
marketHandlerMap: make(map[string]*MarketHandler),
Wg: sync.WaitGroup{},
HydroEngine: e,
}
markets := models.MarketDao.FindPublishedMarkets()
for _, market := range markets {
_, err := engine.newMarket(market.ID)
if err != nil {
panic(err)
}
}
return engine
}
func (e *DexEngine) newMarket(marketId string) (marketHandler *MarketHandler, err error) {
_, ok := e.marketHandlerMap[marketId]
if ok {
err = fmt.Errorf("open market fail, market [%s] already exist", marketId)
return
}
market := models.MarketDao.FindMarketByID(marketId)
if market == nil {
err = fmt.Errorf("open market fail, market [%s] not found", marketId)
return
}
if !market.IsPublished {
err = fmt.Errorf("open market fail, market [%s] not published", marketId)
return
}
marketHandler, err = NewMarketHandler(e.ctx, market, e.HydroEngine)
if err != nil {
return
}
e.marketHandlerMap[market.ID] = marketHandler
utils.Infof("market %s init done", marketHandler.market.ID)
return
}
func (e *DexEngine) closeMarket(marketId string) {
_, ok := e.marketHandlerMap[marketId]
if !ok {
utils.Errorf("close market fail, market [%s] not found", marketId)
return
}
marketHandler := e.marketHandlerMap[marketId]
delete(e.marketHandlerMap, marketId)
marketHandler.Stop()
return
}
func runMarket(e *DexEngine, marketHandler *MarketHandler) {
e.Wg.Add(1)
go func() {
defer e.Wg.Done()
utils.Infof("%s market handler is running", marketHandler.market.ID)
defer utils.Infof("%s market handler is stopped", marketHandler.market.ID)
marketHandler.Run()
}()
}
func (e *DexEngine) start() {
for i := range e.marketHandlerMap {
marketHandler := e.marketHandlerMap[i]
runMarket(e, marketHandler)
}
go func() {
for {
select {
case <-e.ctx.Done():
for _, handler := range e.marketHandlerMap {
close(handler.eventChan)
}
return
default:
data, err := e.eventQueue.Pop()
if err != nil {
panic(err)
}
var event common.Event
err = json.Unmarshal(data, &event)
if err != nil {
utils.Errorf("wrong event format: %+v", err)
continue
}
switch event.Type {
case common.EventOpenMarket:
marketHandler, err := e.newMarket(event.MarketID)
if err == nil {
runMarket(e, marketHandler)
} else {
utils.Errorf(err.Error())
}
break
case common.EventCloseMarket:
e.closeMarket(event.MarketID)
break
default:
marketHandler, ok := e.marketHandlerMap[event.MarketID]
if !ok {
utils.Errorf("engine not support market [%s]", event.MarketID)
} else {
marketHandler.eventChan <- data
}
}
}
}
}()
}
var hydroProtocol = ðereum.EthereumHydroProtocol{}
func Run(ctx context.Context, startMetrics func()) {
utils.Infof("dex engine start...")
//init database
models.Connect(os.Getenv("HSK_DATABASE_URL"))
//start dex engine
dexEngine := NewDexEngine(ctx)
dexEngine.start()
go startMetrics()
dexEngine.Wg.Wait()
utils.Infof("dex engine stopped!")
}