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grpc.go
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grpc.go
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package telemetry
import (
"context"
"go.opencensus.io/plugin/ocgrpc"
"google.golang.org/grpc"
grpcstats "google.golang.org/grpc/stats"
"github.com/pomerium/pomerium/internal/telemetry/metrics"
)
type tagRPCHandler interface {
TagRPC(context.Context, *grpcstats.RPCTagInfo) context.Context
}
// GRPCServerStatsHandler provides a grpc stats.Handler for metrics and tracing for a pomerium service
type GRPCServerStatsHandler struct {
service string
metricsHandler tagRPCHandler
grpcstats.Handler
}
// TagRPC implements grpc.stats.Handler and adds metrics and tracing metadata to the context of a given RPC
func (h *GRPCServerStatsHandler) TagRPC(ctx context.Context, tagInfo *grpcstats.RPCTagInfo) context.Context {
handledCtx := h.Handler.TagRPC(ctx, tagInfo)
metricCtx := h.metricsHandler.TagRPC(handledCtx, tagInfo)
return metricCtx
}
// NewGRPCServerStatsHandler creates a new GRPCServerStatsHandler for a pomerium service
func NewGRPCServerStatsHandler(service string) grpcstats.Handler {
return &GRPCServerStatsHandler{
service: ServiceName(service),
Handler: &ocgrpc.ServerHandler{},
metricsHandler: metrics.NewGRPCServerMetricsHandler(ServiceName(service)),
}
}
// GRPCClientStatsHandler provides DialOptions for grpc clients to instrument network calls with
// both metrics and tracing
type GRPCClientStatsHandler struct {
UnaryInterceptor grpc.UnaryClientInterceptor
// TODO: we should have a streaming interceptor too
grpcstats.Handler
}
// NewGRPCClientStatsHandler returns a new GRPCClientStatsHandler used to create
// telemetry related client DialOptions
func NewGRPCClientStatsHandler(service string) *GRPCClientStatsHandler {
return &GRPCClientStatsHandler{
Handler: &ocgrpc.ClientHandler{},
UnaryInterceptor: metrics.GRPCClientInterceptor(ServiceName(service)),
}
}