mobile: bindings

Author: kaloudis

mobile/log.go

@@ -0,0 +1,62 @@
+package mobile
+
+import (
+	"github.com/btcsuite/btclog"
+	"github.com/lightninglabs/lightning-node-connect/mailbox"
+	"github.com/lightningnetwork/lnd"
+	"github.com/lightningnetwork/lnd/build"
+	"github.com/lightningnetwork/lnd/signal"
+	"google.golang.org/grpc/grpclog"
+)
+
+const Subsystem = "MOBL"
+
+var (
+	log btclog.Logger
+)
+
+// SetupLoggers initializes all package-global logger variables.
+func SetupLoggers(root *build.RotatingLogWriter, intercept signal.Interceptor) {
+	genLogger := genSubLogger(root, intercept)
+
+	log = build.NewSubLogger(Subsystem, genLogger)
+
+	lnd.SetSubLogger(root, Subsystem, log)
+	lnd.AddSubLogger(root, mailbox.Subsystem, intercept, mailbox.UseLogger)
+
+	grpclog.SetLoggerV2(NewGrpcLogLogger(root, intercept, "GRPC"))
+}
+
+// genSubLogger creates a logger for a subsystem. We provide an instance of
+// a signal.Interceptor to be able to shutdown in the case of a critical error.
+func genSubLogger(root *build.RotatingLogWriter,
+	interceptor signal.Interceptor) func(string) btclog.Logger {
+
+	// Create a shutdown function which will request shutdown from our
+	// interceptor if it is listening.
+	shutdown := func() {
+		if !interceptor.Listening() {
+			return
+		}
+
+		interceptor.RequestShutdown()
+	}
+
+	// Return a function which will create a sublogger from our root
+	// logger without shutdown fn.
+	return func(tag string) btclog.Logger {
+		return root.GenSubLogger(tag, shutdown)
+	}
+}
+
+// NewGrpcLogLogger creates a new grpclog compatible logger and attaches it as
+// a sub logger to the passed root logger.
+func NewGrpcLogLogger(root *build.RotatingLogWriter,
+	intercept signal.Interceptor, subsystem string) *mailbox.GrpcLogLogger {
+
+	logger := build.NewSubLogger(subsystem, genSubLogger(root, intercept))
+	lnd.SetSubLogger(root, subsystem, logger)
+	return &mailbox.GrpcLogLogger{
+		Logger: logger,
+	}
+}