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Client.go
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Client.go
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package Logging
import (
"fmt"
"github.com/griesbacher/Yarbes/Event"
"github.com/griesbacher/Yarbes/Logging/Local"
"github.com/griesbacher/Yarbes/Logging/LogServer"
"github.com/griesbacher/Yarbes/NetworkInterfaces/RPC/Outgoing"
"github.com/kdar/factorlog"
"os"
"runtime"
)
//Client combines locallogging with factorlog and remote logging via RPC
type Client struct {
logRPC *Outgoing.RPCInterface
name string
localLogger *factorlog.FactorLog
logLocal bool
}
//NewLocalClient constructs a new client, which logs to stdout
func NewLocalClient() *Client {
return &Client{localLogger: Local.GetLogger()}
}
//NewClientOwnName creates a localClient or a RPC if a address is given and uses the given name as source
func NewClientOwnName(target, name string) (*Client, error) {
if target == "" {
//use local logger
return NewLocalClient(), nil
}
logLocal := false
logRPC := Outgoing.NewRPCInterface(target)
if err := logRPC.Connect(); err != nil {
fmt.Println(err)
logLocal = true
}
var clientName string
if name == "" {
for name := range logRPC.Config.NameToCertificate {
clientName = name
break
}
if clientName == "" {
var err error
clientName, err = os.Hostname()
if err != nil {
return nil, err
}
}
} else {
clientName = name
}
err := logRPC.SendMessage(LogServer.NewDebugLogMessage(clientName, clientName+"-connected"))
if err != nil {
fmt.Println(err)
logLocal = true
}
return &Client{logRPC: logRPC, name: clientName, localLogger: Local.GetLogger(), logLocal: logLocal}, nil
}
//NewClient creates a localClient or a RPC if a address is given
func NewClient(target string) (*Client, error) {
return NewClientOwnName(target, "")
}
//LogMultiple sends the logMessages to the remote logServer, log an error to stdout
func (client Client) LogMultiple(messages *[]*LogServer.LogMessage) {
if client.logLocal {
for message := range *messages {
client.localLogger.Println(message)
}
} else {
err := client.logRPC.SendMessages(messages)
if err != nil {
client.localLogger.Error(appendStackToMessage(err))
}
}
}
//Log sends the logMessage to the remote logServer, log an error to stdout
func (client Client) Log(event *Event.Event, message *LogServer.LogMessage) {
if client.logLocal {
client.localLogger.Println(message)
} else {
if event != nil {
message.Event = *event
}
err := client.logRPC.SendMessage(message)
if err != nil {
client.localLogger.Error(appendStackToMessage(err))
}
}
}
//Disconnect closes the connection to the remote logServer
func (client Client) Disconnect() {
if client.logRPC != nil {
client.logRPC.Disconnect()
}
}
//DebugEvent logs the event and the message local/remote to on debug level
func (client Client) DebugEvent(event *Event.Event, v ...interface{}) {
if client.logLocal {
client.localLogger.Debug(v)
} else {
client.Log(event, LogServer.NewDebugLogMessage(client.name, fmt.Sprint(v)))
}
}
//Debug logs the message local/remote to on debug level
func (client Client) Debug(v ...interface{}) {
client.DebugEvent(nil, v)
}
//Info logs the message local/remote to on info level
func (client Client) Info(v ...interface{}) {
if client.logLocal {
client.localLogger.Info(v)
} else {
client.Log(nil, LogServer.NewInfoLogMessage(client.name, fmt.Sprint(v)))
}
}
//Warn logs the message local/remote to on warn level
func (client Client) Warn(v ...interface{}) {
if client.logLocal {
client.localLogger.Warn(v)
} else {
client.Log(nil, LogServer.NewWarnLogMessage(client.name, fmt.Sprint(v)))
}
}
//Error logs the message local/remote to on error level
func (client Client) Error(v ...interface{}) {
message := appendStackToMessage(v)
if client.logLocal {
client.localLogger.Error(message)
} else {
client.Log(nil, LogServer.NewErrorLogMessage(client.name, message))
}
}
func appendStackToMessage(v ...interface{}) string {
buf := make([]byte, 1<<16)
stackSize := runtime.Stack(buf, true)
stack := fmt.Sprintf("%s\n", string(buf[0:stackSize]))
if stackSize > 1000 {
f, _ := os.Create("error_dump")
f.WriteString(fmt.Sprintf("%s\n%s", v, stack))
return fmt.Sprintf("%s\ndumped to file", v)
}
return fmt.Sprintf("%s\n%s", v, stack)
}