Add zap log adapter

.travis.yml

@@ -57,6 +57,7 @@ install:
   - go get -u github.com/satori/go.uuid
   - go get -u github.com/sirupsen/logrus
   - go get -u github.com/pkg/errors
+  - go get -u go.uber.org/zap
 
 script:
   - go test -v -race ./...

log/zapadapter/adapter.go

@@ -0,0 +1,40 @@
+// Package zapadapter provides a logger that writes to a go.uber.org/zap.Logger.
+package zapadapter
+
+import (
+	"github.com/jackc/pgx"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+type Logger struct {
+	logger *zap.Logger
+}
+
+func NewLogger(logger *zap.Logger) *Logger {
+	return &Logger{logger: logger.WithOptions(zap.AddCallerSkip(1))}
+}
+
+func (pl *Logger) Log(level pgx.LogLevel, msg string, data map[string]interface{}) {
+	fields := make([]zapcore.Field, len(data))
+	i := 0
+	for k, v := range data {
+		fields[i] = zap.Reflect(k, v)
+		i++
+	}
+
+	switch level {
+	case pgx.LogLevelTrace:
+		pl.logger.Debug(msg, append(fields, zap.Stringer("PGX_LOG_LEVEL", level))...)
+	case pgx.LogLevelDebug:
+		pl.logger.Debug(msg, fields...)
+	case pgx.LogLevelInfo:
+		pl.logger.Info(msg, fields...)
+	case pgx.LogLevelWarn:
+		pl.logger.Warn(msg, fields...)
+	case pgx.LogLevelError:
+		pl.logger.Error(msg, fields...)
+	default:
+		pl.logger.Error(msg, append(fields, zap.Stringer("PGX_LOG_LEVEL", level))...)
+	}
+}