/
engine.go
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/
engine.go
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package cmd
import (
"context"
"fmt"
"io/ioutil"
"net/http"
"runtime"
"github.com/DataDog/datadog-go/statsd"
bugsnag "github.com/bugsnag/bugsnag-go"
"github.com/october93/engine/coinmanager"
"github.com/october93/engine/debug"
"github.com/october93/engine/gql"
"github.com/october93/engine/kit/log"
"github.com/october93/engine/rpc"
"github.com/october93/engine/rpc/notifications"
"github.com/october93/engine/rpc/protocol"
"github.com/october93/engine/rpc/push"
"github.com/october93/engine/rpc/server"
"github.com/october93/engine/search"
"github.com/october93/engine/store"
"github.com/october93/engine/store/datastore"
"github.com/october93/engine/worker"
"github.com/october93/engine/worker/activityrecorder"
"github.com/october93/engine/worker/emailsender"
)
type Engine struct {
sessionCleaner *worker.SessionCleaner
databaseMonitor *worker.DatabaseMonitor
reengagementWorker *worker.ReengagementWorker
server interface {
Open() error
Close() error
}
Closed chan struct{}
bp BuildParameters
config *Config
log log.Logger
}
func NewEngine(bp BuildParameters, config *Config, log log.Logger) *Engine {
return &Engine{
Closed: make(chan struct{}),
bp: bp,
config: config,
log: log,
}
}
func (e *Engine) Run() error {
ctx := context.Background()
e.log.Info(fmt.Sprintf("engine starting, version %s, branch %s, commit %s", e.bp.Version, e.bp.Branch, e.bp.Commit))
e.log.Info(fmt.Sprintf("Go version %s, GOMAXPROCS set to %d", runtime.Version(), runtime.GOMAXPROCS(0)))
var err error
if isDeployed(e.bp.Version) {
bugsnag.Configure(bugsnag.Configuration{
APIKey: e.config.BugsnagAPIKey,
ReleaseStage: e.config.Environment,
ProjectPackages: []string{"main", "github.com/october93/engine/**"},
})
}
if e.config.Debug.Profile {
profiler := debug.NewProfiler(e.config.Debug, e.log)
go func() {
err = profiler.Start()
if err != nil {
e.log.Error(err)
}
}()
}
err = datastore.SetupDatabase(e.config.Store.Datastore)
if err != nil {
return err
}
store, err := store.NewStore(&e.config.Store, e.log)
if err != nil {
return err
}
err = store.EnsureRootUser()
if err != nil {
return err
}
settings, err := store.EnsureSettings()
if err != nil {
return err
}
// set up search indexing
indexer, err := search.NewIndexer(store, e.log, &e.config.Search)
if err != nil {
return err
}
var statsdClient *statsd.Client
if e.config.Metrics.Enabled {
ec2InstanceID := "unknown"
var resp *http.Response
resp, err = http.Get("http://169.254.169.254/latest/meta-data/instance-id")
if err != nil {
e.log.Error(err)
}
var result []byte
result, err = ioutil.ReadAll(resp.Body)
if err != nil {
e.log.Error(err)
} else {
ec2InstanceID = string(result)
e.log = e.log.With("instanceID", ec2InstanceID)
}
statsdClient, err = statsd.New(e.config.Metrics.DatadogAgentURL)
if err != nil {
return err
}
statsdClient.Namespace = "engine."
statsdClient.Tags = append(statsdClient.Tags, fmt.Sprintf("env:%s", e.config.Environment))
statsdClient.Tags = append(statsdClient.Tags, fmt.Sprintf("instance-id:%s", ec2InstanceID))
}
// set up Router
connections := protocol.NewConnections(statsdClient, e.log)
// set up notifier
nw, err := worker.NewNotifier(store, &e.config.Worker, e.log)
if err != nil {
return err
}
// set up session cleaner worker
e.sessionCleaner = worker.NewSessionCleaner(store, e.log)
e.sessionCleaner.Start()
// set up worker for sending out emails
ew, err := emailsender.NewEmailSender(&e.config.Worker, e.log)
if err != nil {
return err
}
e.reengagementWorker = worker.NewReengagementWorker(store, nw, e.log)
// set up activity recorder
ar, err := activityrecorder.NewActivityRecorder(&e.config.Worker, &e.config.Store, e.log)
if err != nil {
return err
}
// bundle all workers together
wk := struct {
*worker.Notifier
*worker.SessionCleaner
*emailsender.EmailSender
}{
Notifier: nw,
SessionCleaner: e.sessionCleaner,
EmailSender: ew,
}
// set up email templates
templates, err := emailsender.NewMailTemplates()
if err != nil {
return err
}
// set up image processor
ip, err := rpc.NewImageProcessor(&e.config.Server.RPC, e.log)
if err != nil {
return err
}
// Populate datastore with necessary entities
err = store.Populate()
if err != nil {
return err
}
// set up Facebook OAuth2
oauth2 := rpc.NewOAuth2(e.config.Server.RPC.FacebookAppID, e.config.Server.RPC.FacebookAppSecret)
router := protocol.NewRouter(store, connections, settings, &e.config.Server.Protocol, e.log)
// set up Pusher
p, err := push.NewPusher(connections, store, &e.config.Push, e.log)
if err != nil {
return err
}
// create notifications builder
imagePath := fmt.Sprintf("https://s3-%s.amazonaws.com/%s/%s", e.config.Server.RPC.S3Region, e.config.Server.RPC.S3Bucket, e.config.Server.RPC.SystemIconPath)
ns := notifications.NewNotifications(store, imagePath, e.config.Server.RPC.UnitsPerCoin)
// Coin manager
cm := coinmanager.NewCoinManager(store, &e.config.CoinManager)
resps := rpc.NewResponses(store)
// set up RPC API and wrap into analytics middleware
r := rpc.NewRPC(store, wk, oauth2, ip, &e.config.Server.RPC, e.log, templates, nw, p, settings, ns, indexer, cm, resps)
// set up GraphQL API
graphql := gql.NewGraphQL(store, r, router, ip, settings, e.log, nw, p, indexer, &e.config.GraphQL)
// wrap RPC API in instrumenting middleware when enabled
if e.config.Metrics.Enabled {
r = rpc.NewInstrumentingMiddleware(r, statsdClient, e.log)
e.databaseMonitor = worker.NewDatabaseMonitor(store.Store, statsdClient, e.log)
e.databaseMonitor.Start()
}
r = rpc.NewLoggingMiddleware(r, e.log)
r = rpc.NewRecordingMiddleware(r, ar, e.log)
e.log.Info("engine started")
// start server
e.server = server.NewServer(store, graphql, r, router, statsdClient, &e.config.Server, e.log, ctx)
return e.server.Open()
}
func (e *Engine) Close() {
if e.sessionCleaner != nil {
e.sessionCleaner.Stop()
}
if e.databaseMonitor != nil {
e.databaseMonitor.Stop()
}
if err := e.server.Close(); err != nil {
e.log.Error(err)
}
close(e.Closed)
}