complete meter

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

conn.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql/driver"
 	"fmt"
+	"time"
 )
 
 // wrapperConn defines a wrapper for driver.Conn
@@ -14,79 +15,160 @@ type wrapperConn struct {
 
 // Prepare implements driver.Conn Prepare
 func (w *wrapperConn) Prepare(query string) (driver.Stmt, error) {
+	labels := []string{labelMethod, "Prepare", labelQuery, labelUnknown}
+	ts := time.Now()
 	stmt, err := w.conn.Prepare(query)
+	te := time.Since(ts).Seconds()
 	if err != nil {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 		return nil, err
 	}
+	w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
+	w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+	w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 	return &wrapperStmt{stmt: stmt, opts: w.opts}, nil
 }
 
 // Close implements driver.Conn Close
 func (w *wrapperConn) Close() error {
-	return w.conn.Close()
+	labels := []string{labelMethod, "Close"}
+	ts := time.Now()
+	err := w.conn.Close()
+	te := time.Since(ts).Seconds()
+	if err != nil {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
+	} else {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
+	}
+	w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+	w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
+	return err
 }
 
 // Begin implements driver.Conn Begin
 func (w *wrapperConn) Begin() (driver.Tx, error) {
+	labels := []string{labelMethod, "Begin"}
+	ts := time.Now()
+	// nolint:staticcheck
 	tx, err := w.conn.Begin()
+	te := time.Since(ts).Seconds()
 	if err != nil {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 		return nil, err
 	}
+	w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
+	w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+	w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 	return &wrapperTx{tx: tx, opts: w.opts}, nil
 }
 
 // BeginTx implements driver.ConnBeginTx BeginTx
 func (w *wrapperConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
 	nctx, span := w.opts.Tracer.Start(ctx, "BeginTx")
-	span.AddLabels("op", "BeginTx")
-	if name := getQueryName(ctx); name != "" {
+	span.AddLabels("method", "BeginTx")
+	name := getQueryName(ctx)
+	if name != "" {
 		span.AddLabels("query", name)
+	} else {
+		name = labelUnknown
 	}
+	labels := []string{labelMethod, "BeginTx", labelQuery, name}
 	if connBeginTx, ok := w.conn.(driver.ConnBeginTx); ok {
+		ts := time.Now()
 		tx, err := connBeginTx.BeginTx(nctx, opts)
+		te := time.Since(ts).Seconds()
 		if err != nil {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
+			w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+			w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 			span.AddLabels("error", true)
 			span.AddLabels("err", err.Error())
 			return nil, err
 		}
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
 		return &wrapperTx{tx: tx, opts: w.opts, span: span}, nil
 	}
+	ts := time.Now()
+	// nolint:staticcheck
 	tx, err := w.conn.Begin()
+	te := time.Since(ts).Seconds()
 	if err != nil {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 		span.AddLabels("error", true)
 		span.AddLabels("err", err.Error())
 	}
-	return tx, err
+	w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
+	w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+	w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
+	return tx, nil
 }
 
 // PrepareContext implements driver.ConnPrepareContext PrepareContext
 func (w *wrapperConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
 	nctx, span := w.opts.Tracer.Start(ctx, "PrepareContext")
-	span.AddLabels("op", "PrepareContext")
-	if name := getQueryName(ctx); name != "" {
+	span.AddLabels("method", "PrepareContext")
+	name := getQueryName(ctx)
+	if name != "" {
 		span.AddLabels("query", name)
+	} else {
+		name = labelUnknown
 	}
+	labels := []string{labelMethod, "PrepareContext", labelQuery, name}
 	if connPrepareContext, ok := w.conn.(driver.ConnPrepareContext); ok {
+		ts := time.Now()
 		stmt, err := connPrepareContext.PrepareContext(nctx, query)
+		te := time.Since(ts).Seconds()
 		if err != nil {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
+			w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+			w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 			span.AddLabels("error", true)
 			span.AddLabels("err", err.Error())
 			return nil, err
 		}
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 		return &wrapperStmt{stmt: stmt, opts: w.opts}, nil
 	}
+	ts := time.Now()
 	stmt, err := w.conn.Prepare(query)
+	te := time.Since(ts).Seconds()
 	if err != nil {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 		span.AddLabels("error", true)
 		span.AddLabels("err", err.Error())
 	}
-	return stmt, err
+	w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
+	w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+	w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
+	return stmt, nil
 }
 
 // Exec implements driver.Execer Exec
 func (w *wrapperConn) Exec(query string, args []driver.Value) (driver.Result, error) {
+	// nolint:staticcheck
+	labels := []string{labelMethod, "Exec", labelQuery, labelUnknown}
 	if execer, ok := w.conn.(driver.Execer); ok {
-		return execer.Exec(query, args)
+		ts := time.Now()
+		res, err := execer.Exec(query, args)
+		te := time.Since(ts).Seconds()
+		if err != nil {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
+		} else {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
+		}
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
+		return res, err
 	}
 	return nil, ErrUnsupported
 }
@@ -94,20 +176,32 @@ func (w *wrapperConn) Exec(query string, args []driver.Value) (driver.Result, er
 // Exec implements driver.StmtExecContext ExecContext
 func (w *wrapperConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
 	nctx, span := w.opts.Tracer.Start(ctx, "ExecContext")
-	span.AddLabels("op", "ExecContext")
-	if name := getQueryName(ctx); name != "" {
+	span.AddLabels("method", "ExecContext")
+	name := getQueryName(ctx)
+	if name != "" {
 		span.AddLabels("query", name)
+	} else {
+		name = labelUnknown
 	}
 	defer span.Finish()
 	if len(args) > 0 {
 		span.AddLabels("args", fmt.Sprintf("%v", namedValueToLabels(args)))
 	}
+	labels := []string{labelMethod, "ExecContext", labelQuery, name}
 	if execerContext, ok := w.conn.(driver.ExecerContext); ok {
+		ts := time.Now()
 		res, err := execerContext.ExecContext(nctx, query, args)
+		te := time.Since(ts).Seconds()
 		if err != nil {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
 			span.AddLabels("error", true)
 			span.AddLabels("err", err.Error())
+		} else {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
 		}
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 		return res, err
 	}
 	values, err := namedValueToValue(args)
@@ -116,11 +210,19 @@ func (w *wrapperConn) ExecContext(ctx context.Context, query string, args []driv
 		span.AddLabels("err", err.Error())
 		return nil, err
 	}
+	ts := time.Now()
+	// nolint:staticcheck
 	res, err := w.Exec(query, values)
+	te := time.Since(ts).Seconds()
 	if err != nil {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
 		span.AddLabels("error", true)
 		span.AddLabels("err", err.Error())
+	} else {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
 	}
+	w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+	w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 	return res, err
 }
 
@@ -129,20 +231,40 @@ func (w *wrapperConn) Ping(ctx context.Context) error {
 	if pinger, ok := w.conn.(driver.Pinger); ok {
 		nctx, span := w.opts.Tracer.Start(ctx, "Ping")
 		defer span.Finish()
+		labels := []string{labelMethod, "Ping"}
+		ts := time.Now()
 		err := pinger.Ping(nctx)
+		te := time.Since(ts).Seconds()
 		if err != nil {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
 			span.AddLabels("error", true)
 			span.AddLabels("err", err.Error())
 			return err
+		} else {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
 		}
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 	}
 	return ErrUnsupported
 }
 
 // Query implements driver.Queryer Query
 func (w *wrapperConn) Query(query string, args []driver.Value) (driver.Rows, error) {
+	// nolint:staticcheck
 	if queryer, ok := w.conn.(driver.Queryer); ok {
-		return queryer.Query(query, args)
+		labels := []string{labelMethod, "Query", labelQuery, labelUnknown}
+		ts := time.Now()
+		rows, err := queryer.Query(query, args)
+		te := time.Since(ts).Seconds()
+		if err != nil {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
+		} else {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
+		}
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
+		return rows, err
 	}
 	return nil, ErrUnsupported
 }
@@ -150,20 +272,31 @@ func (w *wrapperConn) Query(query string, args []driver.Value) (driver.Rows, err
 // QueryContext implements Driver.QueryerContext QueryContext
 func (w *wrapperConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
 	nctx, span := w.opts.Tracer.Start(ctx, "QueryContext")
-	span.AddLabels("op", "QueryContext")
-	if name := getQueryName(ctx); name != "" {
+	span.AddLabels("method", "QueryContext")
+	name := getQueryName(ctx)
+	if name != "" {
 		span.AddLabels("query", name)
+	} else {
+		name = labelUnknown
 	}
 	defer span.Finish()
 	if len(args) > 0 {
 		span.AddLabels("args", fmt.Sprintf("%v", namedValueToLabels(args)))
 	}
+	labels := []string{labelMethod, "QueryContext", labelQuery, name}
 	if queryerContext, ok := w.conn.(driver.QueryerContext); ok {
+		ts := time.Now()
 		rows, err := queryerContext.QueryContext(nctx, query, args)
+		te := time.Since(ts).Seconds()
 		if err != nil {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
 			span.AddLabels("error", true)
 			span.AddLabels("err", err.Error())
+		} else {
+			w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
 		}
+		w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+		w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 		return rows, err
 	}
 	values, err := namedValueToValue(args)
@@ -172,10 +305,18 @@ func (w *wrapperConn) QueryContext(ctx context.Context, query string, args []dri
 		span.AddLabels("err", err.Error())
 		return nil, err
 	}
+	ts := time.Now()
+	// nolint:staticcheck
 	rows, err := w.Query(query, values)
+	te := time.Since(ts).Seconds()
 	if err != nil {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelFailure)...).Inc()
 		span.AddLabels("error", true)
 		span.AddLabels("err", err.Error())
+	} else {
+		w.opts.Meter.Counter(meterRequestTotal, append(labels, labelStatus, labelSuccess)...).Inc()
 	}
+	w.opts.Meter.Summary(meterRequestLatencyMicroseconds, labels...).Update(te)
+	w.opts.Meter.Histogram(meterRequestDurationSeconds, labels...).Update(te)
 	return rows, err
 }