/
adapter.go
272 lines (210 loc) · 5.49 KB
/
adapter.go
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package adapter
import (
"errors"
"fmt"
"os"
"sync"
"time"
adapter_manager_pb "github.com/BrobridgeOrg/gravity-api/service/adapter_manager"
dsa "github.com/BrobridgeOrg/gravity-api/service/dsa"
"github.com/BrobridgeOrg/gravity-sdk/core"
buffered_input "github.com/cfsghost/buffered-input"
"github.com/golang/protobuf/proto"
nats "github.com/nats-io/nats.go"
uuid "github.com/satori/go.uuid"
"github.com/sirupsen/logrus"
)
var log = logrus.New()
var pubReqPool = sync.Pool{
New: func() interface{} {
return &dsa.PublishRequest{}
},
}
type AdapterConnector struct {
id string
client *core.Client
options *Options
buffer *buffered_input.BufferedInput
}
func NewAdapterConnector(options *Options) *AdapterConnector {
log.Out = os.Stdout
log.SetLevel(logrus.ErrorLevel)
if options.Verbose {
log.SetLevel(logrus.InfoLevel)
}
ac := &AdapterConnector{
options: options,
// buffer: NewRequestBuffer(options.BatchSize),
}
// Initializing buffered input
opts := buffered_input.NewOptions()
opts.ChunkSize = 1000
opts.ChunkCount = 1000
opts.Timeout = 50 * time.Millisecond
opts.Handler = ac.chunkHandler
ac.buffer = buffered_input.NewBufferedInput(opts)
return ac
}
func NewAdapterConnectorWithClient(client *core.Client, options *Options) *AdapterConnector {
subscriber := NewAdapterConnector(options)
subscriber.client = client
return subscriber
}
func (ac *AdapterConnector) register(component string, adapterID string, name string) error {
log.WithFields(logrus.Fields{
"id": adapterID,
}).Info("Registering adapter")
// Prepare token
key := ac.options.Key
token, err := key.Encryption().PrepareToken()
if err != nil {
return err
}
request := adapter_manager_pb.RegisterAdapterRequest{
AdapterID: adapterID,
Name: name,
Component: component,
AppID: key.GetAppID(),
Token: token,
}
msg, _ := proto.Marshal(&request)
respData, err := ac.request("adapter_manager.register", msg, true)
if err != nil {
return err
}
var reply adapter_manager_pb.RegisterAdapterReply
err = proto.Unmarshal(respData, &reply)
if err != nil {
return err
}
ac.id = adapterID
log.WithFields(logrus.Fields{
"id": adapterID,
}).Info("Adapter was registered")
return nil
}
func (ac *AdapterConnector) publish(requests []*Request) error {
var done int32 = 0
for {
success, count, err := ac.BatchPublish(requests)
if success {
return nil
}
if err != nil {
fmt.Println(err)
continue
}
for i := int32(0); i < count; i++ {
requests[done+i].IsCompleted = true
done++
}
}
}
func (ac *AdapterConnector) chunkHandler(chunk []interface{}) {
requests := make([]*Request, 0, len(chunk))
for _, request := range chunk {
requests = append(requests, request.(*Request))
}
ac.publish(requests)
}
func (ac *AdapterConnector) Connect(host string, options *core.Options) error {
ac.client = core.NewClient()
return ac.client.Connect(host, options)
}
func (ac *AdapterConnector) Disconnect() error {
return ac.Disconnect()
}
func (ac *AdapterConnector) Release() {
ac.buffer.Close()
}
func (ac *AdapterConnector) GetEndpoint() (*core.Endpoint, error) {
return ac.client.ConnectToEndpoint(ac.options.Endpoint, ac.options.Domain, nil)
}
func (ac *AdapterConnector) Register(component string, adapterID string, name string) error {
id := adapterID
if len(id) == 0 {
id = uuid.NewV1().String()
}
err := ac.register(component, id, name)
if err != nil {
return err
}
return nil
}
func (ac *AdapterConnector) BatchPublish(requests []*Request) (bool, int32, error) {
request := &dsa.BatchPublishRequest{
Requests: make([]*dsa.PublishRequest, 0, len(requests)),
}
for _, req := range requests {
if req.IsCompleted {
continue
}
request.Requests = append(request.Requests, &dsa.PublishRequest{
EventName: req.EventName,
Payload: req.Payload,
})
}
// Sned
reqMsg, _ := proto.Marshal(request)
respData, err := ac.request("dsa.batch", reqMsg, true)
if err != nil {
return false, 0, err
}
// Parse reply message
var reply dsa.BatchPublishReply
err = proto.Unmarshal(respData, &reply)
if err != nil {
return false, 0, err
}
if reply.Success {
return true, reply.SuccessCount, nil
}
return false, reply.SuccessCount, errors.New(reply.Reason)
}
func (ac *AdapterConnector) Publish(eventName string, payload []byte, meta map[string]interface{}) error {
/*
ac.buffer.Push(&Request{
EventName: eventName,
Payload: payload,
})
*/
// Getting endpoint from client object
endpoint, err := ac.GetEndpoint()
if err != nil {
return err
}
//js, _ := endpoint.GetConnection().JetStream()
js := endpoint.GetJetStreamContext()
req := pubReqPool.Get().(*dsa.PublishRequest)
req.EventName = eventName
req.Payload = payload
reqData, _ := proto.Marshal(req)
pubReqPool.Put(req)
// process msgId from meta
msgId := fmt.Sprintf("%v", meta["Msg-Id"])
// Send
_, err = js.PublishAsync(endpoint.Channel("dsa.event"), reqData, nats.MsgId(msgId))
if err != nil {
return err
}
return nil
}
func (ac *AdapterConnector) PublishComplete() <-chan struct{} {
// Getting endpoint from client object
endpoint, err := ac.GetEndpoint()
if err != nil {
return nil
}
//js, _ := endpoint.GetConnection().JetStream()
js := endpoint.GetJetStreamContext()
return js.PublishAsyncComplete()
}
func (ac *AdapterConnector) PublishPending() int {
// Getting endpoint from client object
endpoint, err := ac.GetEndpoint()
if err != nil {
return 0
}
js, _ := endpoint.GetConnection().JetStream()
return js.PublishAsyncPending()
}