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grpc_server.go
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grpc_server.go
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// Copyright (c) 2019 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 shared
import (
"context"
"fmt"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/proto-gen/storage_v1"
"github.com/jaegertracing/jaeger/storage/spanstore"
)
const spanBatchSize = 1000
// grpcServer implements shared.StoragePlugin and reads/writes spans and dependencies
type grpcServer struct {
Impl StoragePlugin
}
// GetDependencies returns all interservice dependencies
func (s *grpcServer) GetDependencies(ctx context.Context, r *storage_v1.GetDependenciesRequest) (*storage_v1.GetDependenciesResponse, error) {
deps, err := s.Impl.DependencyReader().GetDependencies(r.EndTime, r.EndTime.Sub(r.StartTime))
if err != nil {
return nil, err
}
return &storage_v1.GetDependenciesResponse{
Dependencies: deps,
}, nil
}
// WriteSpan saves the span
func (s *grpcServer) WriteSpan(ctx context.Context, r *storage_v1.WriteSpanRequest) (*storage_v1.WriteSpanResponse, error) {
err := s.Impl.SpanWriter().WriteSpan(r.Span)
if err != nil {
return nil, err
}
return &storage_v1.WriteSpanResponse{}, nil
}
// GetTrace takes a traceID and streams a Trace associated with that traceID
func (s *grpcServer) GetTrace(r *storage_v1.GetTraceRequest, stream storage_v1.SpanReaderPlugin_GetTraceServer) error {
trace, err := s.Impl.SpanReader().GetTrace(stream.Context(), r.TraceID)
if err != nil {
return err
}
err = s.sendSpans(trace.Spans, stream.Send)
if err != nil {
return err
}
return nil
}
// GetServices returns a list of all known services
func (s *grpcServer) GetServices(ctx context.Context, r *storage_v1.GetServicesRequest) (*storage_v1.GetServicesResponse, error) {
services, err := s.Impl.SpanReader().GetServices(ctx)
if err != nil {
return nil, err
}
return &storage_v1.GetServicesResponse{
Services: services,
}, nil
}
// GetOperations returns the operations of a given service
func (s *grpcServer) GetOperations(
ctx context.Context,
r *storage_v1.GetOperationsRequest,
) (*storage_v1.GetOperationsResponse, error) {
operations, err := s.Impl.SpanReader().GetOperations(ctx, spanstore.OperationQueryParameters{
ServiceName: r.Service,
SpanKind: r.SpanKind,
})
if err != nil {
return nil, err
}
grpcOperation := make([]*storage_v1.Operation, len(operations))
for i, operation := range operations {
grpcOperation[i] = &storage_v1.Operation{
Name: operation.Name,
SpanKind: operation.SpanKind,
}
}
return &storage_v1.GetOperationsResponse{
Operations: grpcOperation,
}, nil
}
// FindTraces streams traces that match the traceQuery
func (s *grpcServer) FindTraces(r *storage_v1.FindTracesRequest, stream storage_v1.SpanReaderPlugin_FindTracesServer) error {
traces, err := s.Impl.SpanReader().FindTraces(stream.Context(), &spanstore.TraceQueryParameters{
ServiceName: r.Query.ServiceName,
OperationName: r.Query.OperationName,
Tags: r.Query.Tags,
StartTimeMin: r.Query.StartTimeMin,
StartTimeMax: r.Query.StartTimeMax,
DurationMin: r.Query.DurationMin,
DurationMax: r.Query.DurationMax,
NumTraces: int(r.Query.NumTraces),
})
if err != nil {
return err
}
for _, trace := range traces {
err = s.sendSpans(trace.Spans, stream.Send)
if err != nil {
return err
}
}
return nil
}
// FindTraceIDs retrieves traceIDs that match the traceQuery
func (s *grpcServer) FindTraceIDs(ctx context.Context, r *storage_v1.FindTraceIDsRequest) (*storage_v1.FindTraceIDsResponse, error) {
traceIDs, err := s.Impl.SpanReader().FindTraceIDs(ctx, &spanstore.TraceQueryParameters{
ServiceName: r.Query.ServiceName,
OperationName: r.Query.OperationName,
Tags: r.Query.Tags,
StartTimeMin: r.Query.StartTimeMin,
StartTimeMax: r.Query.StartTimeMax,
DurationMin: r.Query.DurationMin,
DurationMax: r.Query.DurationMax,
NumTraces: int(r.Query.NumTraces),
})
if err != nil {
return nil, err
}
return &storage_v1.FindTraceIDsResponse{
TraceIDs: traceIDs,
}, nil
}
func (s *grpcServer) sendSpans(spans []*model.Span, sendFn func(*storage_v1.SpansResponseChunk) error) error {
chunk := make([]model.Span, 0, len(spans))
for i := 0; i < len(spans); i += spanBatchSize {
chunk = chunk[:0]
for j := i; j < len(spans) && j < i+spanBatchSize; j++ {
chunk = append(chunk, *spans[j])
}
if err := sendFn(&storage_v1.SpansResponseChunk{Spans: chunk}); err != nil {
return fmt.Errorf("grpc plugin failed to send response: %w", err)
}
}
return nil
}