lnd.xprv/log.go

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2015-12-26 09:09:17 +03:00
package main
import (
"fmt"
"os"
"github.com/btcsuite/btcd/connmgr"
"github.com/btcsuite/btclog"
"github.com/btcsuite/seelog"
"github.com/lightningnetwork/lnd/chainntnfs"
"github.com/lightningnetwork/lnd/channeldb"
"github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/routing"
)
// Loggers per subsystem. Note that backendLog is a seelog logger that all of
// the subsystem loggers route their messages to. When adding new subsystems,
// add a reference here, to the subsystemLoggers map, and the useLogger
// function.
var (
backendLog = seelog.Disabled
ltndLog = btclog.Disabled
lnwlLog = btclog.Disabled
peerLog = btclog.Disabled
fndgLog = btclog.Disabled
rpcsLog = btclog.Disabled
srvrLog = btclog.Disabled
ntfnLog = btclog.Disabled
chdbLog = btclog.Disabled
hswcLog = btclog.Disabled
utxnLog = btclog.Disabled
brarLog = btclog.Disabled
cmgrLog = btclog.Disabled
crtrLog = btclog.Disabled
)
// subsystemLoggers maps each subsystem identifier to its associated logger.
var subsystemLoggers = map[string]btclog.Logger{
"LTND": ltndLog,
"LNWL": lnwlLog,
"PEER": peerLog,
"RPCS": rpcsLog,
"SRVR": srvrLog,
"NTFN": ntfnLog,
"CHDB": chdbLog,
"FNDG": fndgLog,
"HSWC": hswcLog,
"UTXN": utxnLog,
"BRAR": brarLog,
"CMGR": cmgrLog,
"CRTR": crtrLog,
}
// useLogger updates the logger references for subsystemID to logger. Invalid
// subsystems are ignored.
func useLogger(subsystemID string, logger btclog.Logger) {
if _, ok := subsystemLoggers[subsystemID]; !ok {
return
}
subsystemLoggers[subsystemID] = logger
switch subsystemID {
case "LTND":
ltndLog = logger
case "LNWL":
lnwlLog = logger
lnwallet.UseLogger(logger)
case "PEER":
peerLog = logger
case "RPCS":
rpcsLog = logger
case "SRVR":
srvrLog = logger
case "NTFN":
ntfnLog = logger
chainntnfs.UseLogger(logger)
case "CHDB":
chdbLog = logger
channeldb.UseLogger(logger)
case "FNDG":
fndgLog = logger
case "HSWC":
hswcLog = logger
case "UTXN":
utxnLog = logger
case "BRAR":
brarLog = logger
case "CMGR":
cmgrLog = logger
connmgr.UseLogger(logger)
case "CRTR":
crtrLog = logger
routing.UseLogger(crtrLog)
}
}
// initSeelogLogger initializes a new seelog logger that is used as the backend
// for all logging subsystems.
func initSeelogLogger(logFile string) {
config := `
<seelog type="adaptive" mininterval="2000000" maxinterval="100000000"
critmsgcount="500" minlevel="trace">
<outputs formatid="all">
<console />
<rollingfile type="size" filename="%s" maxsize="10485760" maxrolls="3" />
</outputs>
<formats>
<format id="all" format="%%Time %%Date [%%LEV] %%Msg%%n" />
</formats>
</seelog>`
config = fmt.Sprintf(config, logFile)
logger, err := seelog.LoggerFromConfigAsString(config)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to create logger: %v", err)
os.Exit(1)
}
backendLog = logger
}
// setLogLevel sets the logging level for provided subsystem. Invalid
// subsystems are ignored. Uninitialized subsystems are dynamically created as
// needed.
func setLogLevel(subsystemID string, logLevel string) {
// Ignore invalid subsystems.
logger, ok := subsystemLoggers[subsystemID]
if !ok {
return
}
// Default to info if the log level is invalid.
level, ok := btclog.LogLevelFromString(logLevel)
if !ok {
level = btclog.InfoLvl
}
// Create new logger for the subsystem if needed.
if logger == btclog.Disabled {
logger = btclog.NewSubsystemLogger(backendLog, subsystemID+": ")
useLogger(subsystemID, logger)
}
logger.SetLevel(level)
}
// setLogLevels sets the log level for all subsystem loggers to the passed
// level. It also dynamically creates the subsystem loggers as needed, so it
// can be used to initialize the logging system.
func setLogLevels(logLevel string) {
// Configure all sub-systems with the new logging level. Dynamically
// create loggers as needed.
for subsystemID := range subsystemLoggers {
setLogLevel(subsystemID, logLevel)
}
}
// logClosure is used to provide a closure over expensive logging operations
// so don't have to be performed when the logging level doesn't warrant it.
type logClosure func() string
// String invokes the underlying function and returns the result.
func (c logClosure) String() string {
return c()
}
// newLogClosure returns a new closure over a function that returns a string
// which itself provides a Stringer interface so that it can be used with the
// logging system.
func newLogClosure(c func() string) logClosure {
return logClosure(c)
}