service and client implements last grpc server and client interfaces, improved errors, add signals handling

logger/context.go

@@ -0,0 +1,45 @@
+package logger
+
+import (
+	"context"
+	"sync"
+
+	"github.com/sirupsen/logrus"
+)
+
+var (
+	defaultLogger Logger
+	mu            sync.RWMutex
+)
+
+type log struct{}
+
+func init() {
+	defaultLogger = &logger{FieldLogger: logrus.New()}
+}
+
+func SetDefault(logger Logger) {
+	mu.Lock()
+	defer mu.Unlock()
+	defaultLogger = logger
+}
+
+func Set(ctx context.Context, logger Logger) context.Context {
+	return context.WithValue(ctx, log{}, logger)
+}
+
+func From(ctx context.Context) Logger {
+	log, ok := ctx.Value(log{}).(Logger)
+	if ok {
+		return log
+	}
+	if defaultLogger != nil {
+		return defaultLogger
+	}
+	logr := New()
+	mu.Lock()
+	defer mu.Unlock()
+	defaultLogger = logr
+	return defaultLogger
+}
+