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ops_service.go
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ops_service.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 (
"net"
"runtime"
"github.com/uber-go/zap"
)
// StatsService is responsible for gathering and reading stats information from metrics
type StatsService interface {
GetStats() []map[string]interface{}
GetHealthStatus() int
}
type statsService struct {
logger zap.Logger
version string
config Config
tracker Tracker
}
// NewStatsService creates a new StatsService
func NewStatsService(logger zap.Logger, config Config, version string, tracker Tracker) StatsService {
return &statsService{
logger: logger,
version: version,
config: config,
tracker: tracker,
}
}
func (s *statsService) GetHealthStatus() int {
return 0 //TODO - calculate extra information such as connectivity to DB etc
}
func (s *statsService) GetStats() []map[string]interface{} {
memStats := &runtime.MemStats{}
runtime.ReadMemStats(memStats)
data := make(map[string]interface{})
data["name"] = s.config.GetName()
data["health_status"] = s.GetHealthStatus()
data["version"] = s.version
data["address"] = s.getLocalIP()
data["process_count"] = runtime.NumGoroutine()
data["presence_count"] = s.getPresenceCount()
stats := make([]map[string]interface{}, 1)
stats[0] = data
return stats
}
// GetLocalIP returns the non loopback local IP of the host
func (s *statsService) getLocalIP() string {
addrs, err := net.InterfaceAddrs()
if err != nil {
s.logger.Error("Could not get interface addresses", zap.Error(err))
return "127.0.0.1"
}
for _, address := range addrs {
// check the address type and if it is not a loopback the display it
if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
if ipnet.IP.To4() != nil {
return ipnet.IP.String()
}
}
}
s.logger.Warn("No non-loopback address was found")
return "127.0.0.1"
}
func (s *statsService) getPresenceCount() int {
return s.tracker.Count()
}