|
| 1 | +package logger |
| 2 | + |
| 3 | +import ( |
| 4 | + "os" |
| 5 | + "path/filepath" |
| 6 | + |
| 7 | + "github.com/mcp-ecosystem/mcp-gateway/internal/common/config" |
| 8 | + "go.uber.org/zap" |
| 9 | + "go.uber.org/zap/zapcore" |
| 10 | + "gopkg.in/natefinch/lumberjack.v2" |
| 11 | +) |
| 12 | + |
| 13 | +// NewLogger creates a new logger based on configuration |
| 14 | +func NewLogger(cfg *config.LoggerConfig) (*zap.Logger, error) { |
| 15 | + // Set default values if not specified |
| 16 | + if cfg.Level == "" { |
| 17 | + cfg.Level = "info" |
| 18 | + } |
| 19 | + if cfg.Format == "" { |
| 20 | + cfg.Format = "json" |
| 21 | + } |
| 22 | + if cfg.Output == "" { |
| 23 | + cfg.Output = "stdout" |
| 24 | + } |
| 25 | + if cfg.MaxSize == 0 { |
| 26 | + cfg.MaxSize = 100 // 100MB |
| 27 | + } |
| 28 | + if cfg.MaxBackups == 0 { |
| 29 | + cfg.MaxBackups = 3 |
| 30 | + } |
| 31 | + if cfg.MaxAge == 0 { |
| 32 | + cfg.MaxAge = 7 // 7 days |
| 33 | + } |
| 34 | + |
| 35 | + // Create encoder config |
| 36 | + encoderConfig := zapcore.EncoderConfig{ |
| 37 | + TimeKey: "time", |
| 38 | + LevelKey: "level", |
| 39 | + NameKey: "logger", |
| 40 | + CallerKey: "caller", |
| 41 | + MessageKey: "msg", |
| 42 | + StacktraceKey: "stacktrace", |
| 43 | + LineEnding: zapcore.DefaultLineEnding, |
| 44 | + EncodeLevel: zapcore.LowercaseLevelEncoder, |
| 45 | + EncodeTime: zapcore.ISO8601TimeEncoder, |
| 46 | + EncodeDuration: zapcore.SecondsDurationEncoder, |
| 47 | + EncodeCaller: zapcore.ShortCallerEncoder, |
| 48 | + } |
| 49 | + |
| 50 | + // Set color if enabled |
| 51 | + if cfg.Color && cfg.Format == "console" { |
| 52 | + encoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder |
| 53 | + } |
| 54 | + |
| 55 | + // Create encoder |
| 56 | + var encoder zapcore.Encoder |
| 57 | + if cfg.Format == "json" { |
| 58 | + encoder = zapcore.NewJSONEncoder(encoderConfig) |
| 59 | + } else { |
| 60 | + encoder = zapcore.NewConsoleEncoder(encoderConfig) |
| 61 | + } |
| 62 | + |
| 63 | + // Create core |
| 64 | + var core zapcore.Core |
| 65 | + if cfg.Output == "file" { |
| 66 | + // Ensure log directory exists |
| 67 | + if err := os.MkdirAll(filepath.Dir(cfg.FilePath), 0755); err != nil { |
| 68 | + return nil, err |
| 69 | + } |
| 70 | + |
| 71 | + // Create lumberjack logger for file rotation |
| 72 | + writer := &lumberjack.Logger{ |
| 73 | + Filename: cfg.FilePath, |
| 74 | + MaxSize: cfg.MaxSize, |
| 75 | + MaxBackups: cfg.MaxBackups, |
| 76 | + MaxAge: cfg.MaxAge, |
| 77 | + Compress: cfg.Compress, |
| 78 | + } |
| 79 | + |
| 80 | + core = zapcore.NewCore( |
| 81 | + encoder, |
| 82 | + zapcore.AddSync(writer), |
| 83 | + getLogLevel(cfg.Level), |
| 84 | + ) |
| 85 | + } else { |
| 86 | + core = zapcore.NewCore( |
| 87 | + encoder, |
| 88 | + zapcore.AddSync(os.Stdout), |
| 89 | + getLogLevel(cfg.Level), |
| 90 | + ) |
| 91 | + } |
| 92 | + |
| 93 | + // Create logger |
| 94 | + logger := zap.New(core, zap.AddCaller(), zap.AddCallerSkip(1)) |
| 95 | + |
| 96 | + // Add stacktrace if enabled |
| 97 | + if cfg.Stacktrace { |
| 98 | + logger = logger.WithOptions(zap.AddStacktrace(zapcore.ErrorLevel)) |
| 99 | + } |
| 100 | + |
| 101 | + return logger, nil |
| 102 | +} |
| 103 | + |
| 104 | +// getLogLevel converts string level to zapcore.Level |
| 105 | +func getLogLevel(level string) zapcore.Level { |
| 106 | + switch level { |
| 107 | + case "debug": |
| 108 | + return zapcore.DebugLevel |
| 109 | + case "info": |
| 110 | + return zapcore.InfoLevel |
| 111 | + case "warn": |
| 112 | + return zapcore.WarnLevel |
| 113 | + case "error": |
| 114 | + return zapcore.ErrorLevel |
| 115 | + default: |
| 116 | + return zapcore.InfoLevel |
| 117 | + } |
| 118 | +} |
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