/
server.go
257 lines (217 loc) · 5.27 KB
/
server.go
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// package server provides service interfaces and libraries.
// including:
// tcp/http server library.
// rpc service library with addon functionality.
// service discory and registration Logic.
// statistic lib.
package server
import (
// "github.com/vharitonsky/iniflags"
"flag"
"net/http"
"net/rpc"
"time"
)
// server is a singleton
var serverInstance *Server = nil
// Server
type Server struct {
// required
name string
// optional
rpcsvr *RPCServer // RPC server
tcpsvr *TCPServer // TCP server
httpsvr *HTTPServer // HTTP server
timertask TimerTask // timer task
// functions
svrmgr *ServerManager // service registration&discovery manager
rpccli *RPCClient // rpc client
}
// init the server with specific name.
func Init(name string) error {
if serverInstance == nil {
// read config
flag.Parse()
// read network info
readNetInterfaces()
// log
err := initLog(name, *confLogLevel)
if err != nil {
return err
}
// server instance
serverInstance = &Server{
name: name,
}
// init service manager
serverInstance.svrmgr, err = NewServerManager(name, *confEtcd)
if err != nil {
return err
}
// create RPC client
serverInstance.rpccli, err = NewRPCClient()
if err != nil {
return err
}
Log.Infof("server %s init success.", name)
}
return nil
}
// register TCP handler class
func RegisterTCPHandler(handler TCPHandler) error {
if serverInstance == nil {
return errorf(errServerNotInit)
}
if serverInstance.tcpsvr == nil {
if *confTCPHost == "" {
return errorf(errMissingFlag, FlagTCPHost)
}
addr, err := fixHostIp(*confTCPHost)
if err != nil {
return errorf(errWrongHostAddr, confTCPHost)
}
serverInstance.tcpsvr = &TCPServer{
addr: addr,
handler: handler,
useTls: *confUseTls,
}
}
return nil
}
// register HTTP handler class
func RegisterHTTPHandler(handler http.Handler) error {
if serverInstance == nil {
return errorf(errServerNotInit)
}
if serverInstance.httpsvr == nil {
if *confHTTPHost == "" {
return errorf(errMissingFlag, FlagHTTPHost)
}
addr, err := fixHostIp(*confHTTPHost)
if err != nil {
return errorf(errWrongHostAddr, FlagHTTPHost)
}
serverInstance.httpsvr = &HTTPServer{
addr: addr,
handler: handler,
useHttps: *confUseHttps,
}
}
return nil
}
// register RPC handler class
func RegisterRPCHandler(rcvr interface{}) error {
if serverInstance == nil {
return errorf(errServerNotInit)
}
if serverInstance.rpcsvr == nil {
if *confRPCHost == "" {
return errorf(errMissingFlag, FlagRPCHost)
}
addr, err := fixHostIp(*confRPCHost)
if err != nil {
return errorf(errWrongHostAddr, *confRPCHost)
}
err = rpc.Register(rcvr)
if err != nil {
return errorf("Cannot Resgister RPC service: %s", err)
}
handler := rpcHandler{}
serverInstance.rpcsvr = &RPCServer{
TCPServer{
addr: addr,
handler: &handler,
useTls: false, // rpc service do not use tls because it's in internal network
},
}
}
return nil
}
// register timer task
func RegisterTimerTask(task TimerTask) error {
if serverInstance == nil {
return errorf(errServerNotInit)
}
if serverInstance.timertask == nil {
serverInstance.timertask = task
}
return nil
}
// rpc call by name
func RPCCallByName(serverName string, serverMethod string, args interface{}, reply interface{}) error {
if serverInstance == nil {
return errorf(errServerNotInit)
}
return serverInstance.rpccli.Call(serverName, serverMethod, args, reply)
}
// rpc call by host
func RPCCallByHost(host string, serverMethod string, args interface{}, reply interface{}) error {
if serverInstance == nil {
return errorf(errServerNotInit)
}
return serverInstance.rpccli.CallHost(host, serverMethod, args, reply)
}
// get server's hosts by server name and service type
func GetServerHosts(serverName string, hostType string) ([]string, error) {
if serverInstance == nil {
return nil, errorf(errServerNotInit)
}
return serverInstance.svrmgr.GetServerHosts(serverName, hostType)
}
// get this server's rpc host
func GetRPCHost() string {
if serverInstance == nil || serverInstance.rpcsvr == nil {
return ""
}
return serverInstance.rpcsvr.addr
}
// start service
func Run() error {
if serverInstance == nil {
return errorf(errServerNotInit)
}
if serverInstance.tcpsvr != nil {
err := serverInstance.tcpsvr.Start()
if err != nil {
return err
}
Log.Info("starting tcp server ... OK")
}
if serverInstance.httpsvr != nil {
err := serverInstance.httpsvr.Start()
if err != nil {
return err
}
Log.Info("starting http server ... OK")
}
if serverInstance.rpcsvr != nil {
err := serverInstance.rpcsvr.Start()
if err != nil {
return err
}
Log.Info("starting rpc server ... OK")
}
Log.Info("sever launch successfully!")
// loop to do something
for {
// server manager update
err := serverInstance.svrmgr.RegisterServer()
if err != nil {
Log.Warnf("RegisterServer error: %s", err)
} else {
Log.Info("RegisterServer Success")
}
err = serverInstance.svrmgr.UpdateServerHosts()
if err != nil {
Log.Error("UpdateServerHosts error: %s", err)
} else {
Log.Info("UpdateServerHosts Success")
}
//timer task
if serverInstance.timertask != nil {
serverInstance.timertask.DoTask()
}
time.Sleep(60 * time.Second)
}
return nil
}