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|
package pgx
import (
"context"
"encoding/hex"
"errors"
"fmt"
)
// The values for log levels are chosen such that the zero value means that no
// log level was specified.
const (
LogLevelTrace = 6
LogLevelDebug = 5
LogLevelInfo = 4
LogLevelWarn = 3
LogLevelError = 2
LogLevelNone = 1
)
// LogLevel represents the pgx logging level. See LogLevel* constants for
// possible values.
type LogLevel int
func (ll LogLevel) String() string {
switch ll {
case LogLevelTrace:
return "trace"
case LogLevelDebug:
return "debug"
case LogLevelInfo:
return "info"
case LogLevelWarn:
return "warn"
case LogLevelError:
return "error"
case LogLevelNone:
return "none"
default:
return fmt.Sprintf("invalid level %d", ll)
}
}
// Logger is the interface used to get logging from pgx internals.
type Logger interface {
// Log a message at the given level with data key/value pairs. data may be nil.
Log(ctx context.Context, level LogLevel, msg string, data map[string]interface{})
}
// LoggerFunc is a wrapper around a function to satisfy the pgx.Logger interface
type LoggerFunc func(ctx context.Context, level LogLevel, msg string, data map[string]interface{})
// Log delegates the logging request to the wrapped function
func (f LoggerFunc) Log(ctx context.Context, level LogLevel, msg string, data map[string]interface{}) {
f(ctx, level, msg, data)
}
// LogLevelFromString converts log level string to constant
//
// Valid levels:
//
// trace
// debug
// info
// warn
// error
// none
func LogLevelFromString(s string) (LogLevel, error) {
switch s {
case "trace":
return LogLevelTrace, nil
case "debug":
return LogLevelDebug, nil
case "info":
return LogLevelInfo, nil
case "warn":
return LogLevelWarn, nil
case "error":
return LogLevelError, nil
case "none":
return LogLevelNone, nil
default:
return 0, errors.New("invalid log level")
}
}
func logQueryArgs(args []interface{}) []interface{} {
logArgs := make([]interface{}, 0, len(args))
for _, a := range args {
switch v := a.(type) {
case []byte:
if len(v) < 64 {
a = hex.EncodeToString(v)
} else {
a = fmt.Sprintf("%x (truncated %d bytes)", v[:64], len(v)-64)
}
case string:
if len(v) > 64 {
a = fmt.Sprintf("%s (truncated %d bytes)", v[:64], len(v)-64)
}
}
logArgs = append(logArgs, a)
}
return logArgs
}
|
