1 files changed, 80 insertions, 0 deletions
diff --git a/vendor/go.opencensus.io/plugin/ocgrpc/server.go b/vendor/go.opencensus.io/plugin/ocgrpc/server.go
new file mode 100644
index 0000000..b67b3e2
--- /dev/null
+++ b/vendor/go.opencensus.io/plugin/ocgrpc/server.go
@@ -0,0 +1,80 @@
+// Copyright 2018, OpenCensus Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ocgrpc
+
+import (
+	"go.opencensus.io/trace"
+	"golang.org/x/net/context"
+
+	"google.golang.org/grpc/stats"
+)
+
+// ServerHandler implements gRPC stats.Handler recording OpenCensus stats and
+// traces. Use with gRPC servers.
+//
+// When installed (see Example), tracing metadata is read from inbound RPCs
+// by default. If no tracing metadata is present, or if the tracing metadata is
+// present but the SpanContext isn't sampled, then a new trace may be started
+// (as determined by Sampler).
+type ServerHandler struct {
+	// IsPublicEndpoint may be set to true to always start a new trace around
+	// each RPC. Any SpanContext in the RPC metadata will be added as a linked
+	// span instead of making it the parent of the span created around the
+	// server RPC.
+	//
+	// Be aware that if you leave this false (the default) on a public-facing
+	// server, callers will be able to send tracing metadata in gRPC headers
+	// and trigger traces in your backend.
+	IsPublicEndpoint bool
+
+	// StartOptions to use for to spans started around RPCs handled by this server.
+	//
+	// These will apply even if there is tracing metadata already
+	// present on the inbound RPC but the SpanContext is not sampled. This
+	// ensures that each service has some opportunity to be traced. If you would
+	// like to not add any additional traces for this gRPC service, set:
+	//
+	//   StartOptions.Sampler = trace.ProbabilitySampler(0.0)
+	//
+	// StartOptions.SpanKind will always be set to trace.SpanKindServer
+	// for spans started by this handler.
+	StartOptions trace.StartOptions
+}
+
+var _ stats.Handler = (*ServerHandler)(nil)
+
+// HandleConn exists to satisfy gRPC stats.Handler.
+func (s *ServerHandler) HandleConn(ctx context.Context, cs stats.ConnStats) {
+	// no-op
+}
+
+// TagConn exists to satisfy gRPC stats.Handler.
+func (s *ServerHandler) TagConn(ctx context.Context, cti *stats.ConnTagInfo) context.Context {
+	// no-op
+	return ctx
+}
+
+// HandleRPC implements per-RPC tracing and stats instrumentation.
+func (s *ServerHandler) HandleRPC(ctx context.Context, rs stats.RPCStats) {
+	traceHandleRPC(ctx, rs)
+	statsHandleRPC(ctx, rs)
+}
+
+// TagRPC implements per-RPC context management.
+func (s *ServerHandler) TagRPC(ctx context.Context, rti *stats.RPCTagInfo) context.Context {
+	ctx = s.traceTagRPC(ctx, rti)
+	ctx = s.statsTagRPC(ctx, rti)
+	return ctx
+}