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grpc_handler.go
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/
grpc_handler.go
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// Copyright (c) 2018 The Jaeger 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 handler
import (
"context"
"go.uber.org/zap"
"google.golang.org/grpc/codes"
_ "google.golang.org/grpc/encoding/gzip" // register zip encoding
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
"github.com/jaegertracing/jaeger/cmd/collector/app/processor"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/pkg/tenancy"
"github.com/jaegertracing/jaeger/proto-gen/api_v2"
)
// GRPCHandler implements gRPC CollectorService.
type GRPCHandler struct {
logger *zap.Logger
batchConsumer batchConsumer
}
// NewGRPCHandler registers routes for this handler on the given router.
func NewGRPCHandler(logger *zap.Logger, spanProcessor processor.SpanProcessor, tenancyMgr *tenancy.Manager) *GRPCHandler {
return &GRPCHandler{
logger: logger,
batchConsumer: newBatchConsumer(logger,
spanProcessor,
processor.GRPCTransport,
processor.ProtoSpanFormat,
tenancyMgr),
}
}
// PostSpans implements gRPC CollectorService.
func (g *GRPCHandler) PostSpans(ctx context.Context, r *api_v2.PostSpansRequest) (*api_v2.PostSpansResponse, error) {
batch := &r.Batch
err := g.batchConsumer.consume(ctx, batch)
return &api_v2.PostSpansResponse{}, err
}
type batchConsumer struct {
logger *zap.Logger
spanProcessor processor.SpanProcessor
spanOptions processor.SpansOptions
tenancyMgr *tenancy.Manager
}
func newBatchConsumer(logger *zap.Logger, spanProcessor processor.SpanProcessor, transport processor.InboundTransport, spanFormat processor.SpanFormat, tenancyMgr *tenancy.Manager) batchConsumer {
return batchConsumer{
logger: logger,
spanProcessor: spanProcessor,
spanOptions: processor.SpansOptions{
InboundTransport: transport,
SpanFormat: spanFormat,
},
tenancyMgr: tenancyMgr,
}
}
func (c *batchConsumer) consume(ctx context.Context, batch *model.Batch) error {
tenant, err := c.validateTenant(ctx)
if err != nil {
c.logger.Debug("rejecting spans (tenancy)", zap.Error(err))
return err
}
for _, span := range batch.Spans {
if span.GetProcess() == nil {
span.Process = batch.Process
}
}
_, err = c.spanProcessor.ProcessSpans(batch.Spans, processor.SpansOptions{
InboundTransport: processor.GRPCTransport,
SpanFormat: processor.ProtoSpanFormat,
Tenant: tenant,
})
if err != nil {
if err == processor.ErrBusy {
return status.Errorf(codes.ResourceExhausted, err.Error())
}
c.logger.Error("cannot process spans", zap.Error(err))
return err
}
return nil
}
func (c *batchConsumer) validateTenant(ctx context.Context) (string, error) {
if !c.tenancyMgr.Enabled {
return "", nil
}
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
return "", status.Errorf(codes.PermissionDenied, "missing tenant header")
}
tenants := md.Get(c.tenancyMgr.Header)
if len(tenants) < 1 {
return "", status.Errorf(codes.PermissionDenied, "missing tenant header")
} else if len(tenants) > 1 {
return "", status.Errorf(codes.PermissionDenied, "extra tenant header")
}
if !c.tenancyMgr.Valid(tenants[0]) {
return "", status.Errorf(codes.PermissionDenied, "unknown tenant")
}
return tenants[0], nil
}