/
endpoint_writer.go
205 lines (184 loc) · 5.5 KB
/
endpoint_writer.go
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package remote
import (
io "io"
"time"
"github.com/AsynkronIT/protoactor-go/actor"
"github.com/AsynkronIT/protoactor-go/log"
"golang.org/x/net/context"
"google.golang.org/grpc"
)
func endpointWriterProducer(remote *Remote, address string, config *Config) actor.Producer {
return func() actor.Actor {
return &endpointWriter{
address: address,
config: config,
remote: remote,
}
}
}
type endpointWriter struct {
config *Config
address string
conn *grpc.ClientConn
stream Remoting_ReceiveClient
defaultSerializerId int32
remote *Remote
}
func (state *endpointWriter) initialize() {
now := time.Now()
plog.Info("Started EndpointWriter. connecting", log.String("address", state.address))
err := state.initializeInternal()
if err != nil {
plog.Error("EndpointWriter failed to connect", log.String("address", state.address), log.Error(err))
// Wait 2 seconds to restart and retry
// Replace with Exponential Backoff
time.Sleep(2 * time.Second)
panic(err)
}
plog.Info("EndpointWriter connected", log.String("address", state.address), log.Duration("cost", time.Since(now)))
}
func (state *endpointWriter) initializeInternal() error {
conn, err := grpc.Dial(state.address, state.config.DialOptions...)
if err != nil {
return err
}
state.conn = conn
c := NewRemotingClient(conn)
resp, err := c.Connect(context.Background(), &ConnectRequest{})
if err != nil {
return err
}
state.defaultSerializerId = resp.DefaultSerializerId
// log.Printf("Getting stream from address %v", state.address)
stream, err := c.Receive(context.Background(), state.config.CallOptions...)
if err != nil {
return err
}
go func() {
for {
_, err := stream.Recv()
if err == io.EOF {
plog.Debug("EndpointWriter stream completed", log.String("address", state.address))
break
} else if err != nil {
plog.Error("EndpointWriter lost connection", log.String("address", state.address), log.Error(err))
// notify that the endpoint terminated
terminated := &EndpointTerminatedEvent{
Address: state.address,
}
state.remote.actorSystem.EventStream.Publish(terminated)
break
} else {
plog.Info("EndpointWriter remote disconnected", log.String("address", state.address))
// notify that the endpoint terminated
terminated := &EndpointTerminatedEvent{
Address: state.address,
}
state.remote.actorSystem.EventStream.Publish(terminated)
}
}
}()
connected := &EndpointConnectedEvent{Address: state.address}
state.remote.actorSystem.EventStream.Publish(connected)
state.stream = stream
return nil
}
func (state *endpointWriter) sendEnvelopes(msg []interface{}, ctx actor.Context) {
envelopes := make([]*MessageEnvelope, len(msg))
// type name uniqueness map name string to type index
typeNames := make(map[string]int32)
typeNamesArr := make([]string, 0)
targetNames := make(map[string]int32)
targetNamesArr := make([]string, 0)
var header *MessageHeader
var typeID int32
var targetID int32
var serializerID int32
for i, tmp := range msg {
switch unwrapped := tmp.(type) {
case *EndpointTerminatedEvent, EndpointTerminatedEvent:
plog.Debug("Handling array wrapped terminate event", log.String("address", state.address), log.Object("msg", unwrapped))
ctx.Stop(ctx.Self())
return
}
rd := tmp.(*remoteDeliver)
if rd.serializerID == -1 {
serializerID = state.defaultSerializerId
} else {
serializerID = rd.serializerID
}
if rd.header == nil || rd.header.Length() == 0 {
header = nil
} else {
header = &MessageHeader{rd.header.ToMap()}
}
bytes, typeName, err := Serialize(rd.message, serializerID)
if err != nil {
panic(err)
}
typeID, typeNamesArr = addToLookup(typeNames, typeName, typeNamesArr)
targetID, targetNamesArr = addToLookup(targetNames, rd.target.Id, targetNamesArr)
envelopes[i] = &MessageEnvelope{
MessageHeader: header,
MessageData: bytes,
Sender: rd.sender,
Target: targetID,
TypeId: typeID,
SerializerId: serializerID,
}
}
batch := &MessageBatch{
TypeNames: typeNamesArr,
TargetNames: targetNamesArr,
Envelopes: envelopes,
}
err := state.stream.Send(batch)
if err != nil {
ctx.Stash()
plog.Debug("gRPC Failed to send", log.String("address", state.address), log.Error(err))
panic("restart it")
}
}
func addToLookup(m map[string]int32, name string, a []string) (int32, []string) {
max := int32(len(m))
id, ok := m[name]
if !ok {
m[name] = max
id = max
a = append(a, name)
}
return id, a
}
func (state *endpointWriter) Receive(ctx actor.Context) {
switch msg := ctx.Message().(type) {
case *actor.Started:
state.initialize()
case *actor.Stopped:
state.closeClientConn()
case *actor.Restarting:
state.closeClientConn()
case *EndpointTerminatedEvent:
plog.Info("Stopping EnpointWriter", log.String("address", state.address))
ctx.Stop(ctx.Self())
case []interface{}:
state.sendEnvelopes(msg, ctx)
case actor.SystemMessage, actor.AutoReceiveMessage:
// ignore
default:
plog.Error("EndpointWriter received unknown message", log.String("address", state.address), log.TypeOf("type", msg), log.Message(msg))
}
}
func (state *endpointWriter) closeClientConn() {
if state.stream != nil {
err := state.stream.CloseSend()
if err != nil {
plog.Error("EndpointWriter error when closing the stream", log.Error(err))
}
}
if state.conn != nil {
err := state.conn.Close()
if err != nil {
plog.Error("EndpointWriter error when closing the client conn", log.Error(err))
}
}
}