forked from heroiclabs/nakama
/
message_router.go
97 lines (88 loc) · 2.83 KB
/
message_router.go
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// Copyright 2017 The Nakama Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"github.com/gogo/protobuf/jsonpb"
"github.com/gogo/protobuf/proto"
"go.uber.org/zap"
)
// MessageRouter is responsible for sending a message to a list of presences
type MessageRouter interface {
Send(*zap.Logger, []Presence, proto.Message, bool)
}
type messageRouterService struct {
jsonpbMarshaler *jsonpb.Marshaler
registry *SessionRegistry
}
func NewMessageRouterService(jsonpbMarshaler *jsonpb.Marshaler, registry *SessionRegistry) *messageRouterService {
return &messageRouterService{
jsonpbMarshaler: jsonpbMarshaler,
registry: registry,
}
}
func (m *messageRouterService) Send(logger *zap.Logger, ps []Presence, msg proto.Message, reliable bool) {
if len(ps) == 0 {
return
}
// Group together target sessions by format.
jsonSessionIDs := make([]string, 0)
protobufSessionIDs := make([]string, 0)
for _, p := range ps {
switch p.Meta.Format {
case SessionFormatJson:
jsonSessionIDs = append(jsonSessionIDs, p.ID.SessionID)
default:
protobufSessionIDs = append(protobufSessionIDs, p.ID.SessionID)
}
}
// Encode and route together for Protobuf format.
if len(protobufSessionIDs) != 0 {
payload, err := proto.Marshal(msg)
if err != nil {
logger.Error("Could not marshall message to byte[]", zap.Error(err))
return
}
for _, sessionID := range protobufSessionIDs {
session := m.registry.Get(sessionID)
if session == nil {
logger.Warn("No session to route to", zap.Any("sid", sessionID))
continue
}
err := session.SendBytes(payload, reliable)
if err != nil {
logger.Error("Failed to route to", zap.Any("sid", sessionID), zap.Error(err))
}
}
}
// Encode and route together for JSON format.
if len(jsonSessionIDs) != 0 {
payload, err := m.jsonpbMarshaler.MarshalToString(msg)
if err != nil {
logger.Error("Could not marshall message to json", zap.Error(err))
return
}
payloadBytes := []byte(payload)
for _, sessionID := range jsonSessionIDs {
session := m.registry.Get(sessionID)
if session == nil {
logger.Warn("No session to route to", zap.Any("sid", sessionID))
continue
}
err := session.SendBytes(payloadBytes, reliable)
if err != nil {
logger.Error("Failed to route to", zap.Any("sid", sessionID), zap.Error(err))
}
}
}
}