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grpc_handler.go
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/
grpc_handler.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 app
import (
"context"
"github.com/opentracing/opentracing-go"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/cmd/query/app/querysvc"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/proto-gen/api_v2"
"github.com/jaegertracing/jaeger/storage/spanstore"
)
const maxSpanCountInChunk = 10
// GRPCHandler implements the GRPC endpoint of the query service.
type GRPCHandler struct {
queryService *querysvc.QueryService
logger *zap.Logger
tracer opentracing.Tracer
}
// NewGRPCHandler returns a GRPCHandler
func NewGRPCHandler(queryService *querysvc.QueryService, logger *zap.Logger, tracer opentracing.Tracer) *GRPCHandler {
gH := &GRPCHandler{
queryService: queryService,
logger: logger,
tracer: tracer,
}
return gH
}
// GetTrace is the GRPC handler to fetch traces based on trace-id.
func (g *GRPCHandler) GetTrace(r *api_v2.GetTraceRequest, stream api_v2.QueryService_GetTraceServer) error {
trace, err := g.queryService.GetTrace(stream.Context(), r.TraceID)
if err == spanstore.ErrTraceNotFound {
g.logger.Error("trace not found", zap.Error(err))
return err
}
if err != nil {
g.logger.Error("Could not fetch spans from backend", zap.Error(err))
return err
}
return g.sendSpanChunks(trace.Spans, stream.Send)
}
// ArchiveTrace is the GRPC handler to archive traces.
func (g *GRPCHandler) ArchiveTrace(ctx context.Context, r *api_v2.ArchiveTraceRequest) (*api_v2.ArchiveTraceResponse, error) {
err := g.queryService.ArchiveTrace(ctx, r.TraceID)
if err == spanstore.ErrTraceNotFound {
g.logger.Error("trace not found", zap.Error(err))
return nil, err
}
if err != nil {
g.logger.Error("Could not fetch spans from backend", zap.Error(err))
return nil, err
}
return &api_v2.ArchiveTraceResponse{}, nil
}
// FindTraces is the GRPC handler to fetch traces based on TraceQueryParameters.
func (g *GRPCHandler) FindTraces(r *api_v2.FindTracesRequest, stream api_v2.QueryService_FindTracesServer) error {
query := r.GetQuery()
queryParams := spanstore.TraceQueryParameters{
ServiceName: query.ServiceName,
OperationName: query.OperationName,
Tags: query.Tags,
StartTimeMin: query.StartTimeMin,
StartTimeMax: query.StartTimeMax,
DurationMin: query.DurationMin,
DurationMax: query.DurationMax,
NumTraces: int(query.SearchDepth),
}
traces, err := g.queryService.FindTraces(stream.Context(), &queryParams)
if err != nil {
g.logger.Error("Error fetching traces", zap.Error(err))
return err
}
for _, trace := range traces {
if err := g.sendSpanChunks(trace.Spans, stream.Send); err != nil {
return err
}
}
return nil
}
func (g *GRPCHandler) sendSpanChunks(spans []*model.Span, sendFn func(*api_v2.SpansResponseChunk) error) error {
chunk := make([]model.Span, 0, len(spans))
for i := 0; i < len(spans); i += maxSpanCountInChunk {
chunk = chunk[:0]
for j := i; j < len(spans) && j < i+maxSpanCountInChunk; j++ {
chunk = append(chunk, *spans[j])
}
if err := sendFn(&api_v2.SpansResponseChunk{Spans: chunk}); err != nil {
g.logger.Error("failed to send response to client", zap.Error(err))
return err
}
}
return nil
}
// GetServices is the GRPC handler to fetch services.
func (g *GRPCHandler) GetServices(ctx context.Context, r *api_v2.GetServicesRequest) (*api_v2.GetServicesResponse, error) {
services, err := g.queryService.GetServices(ctx)
if err != nil {
g.logger.Error("Error fetching services", zap.Error(err))
return nil, err
}
return &api_v2.GetServicesResponse{Services: services}, nil
}
// GetOperations is the GRPC handler to fetch operations.
func (g *GRPCHandler) GetOperations(ctx context.Context, r *api_v2.GetOperationsRequest) (*api_v2.GetOperationsResponse, error) {
service := r.Service
operations, err := g.queryService.GetOperations(ctx, service)
if err != nil {
g.logger.Error("Error fetching operations", zap.Error(err))
return nil, err
}
return &api_v2.GetOperationsResponse{Operations: operations}, nil
}
// GetDependencies is the GRPC handler to fetch dependencies.
func (g *GRPCHandler) GetDependencies(ctx context.Context, r *api_v2.GetDependenciesRequest) (*api_v2.GetDependenciesResponse, error) {
startTime := r.StartTime
endTime := r.EndTime
dependencies, err := g.queryService.GetDependencies(startTime, endTime.Sub(startTime))
if err != nil {
g.logger.Error("Error fetching dependencies", zap.Error(err))
return nil, err
}
return &api_v2.GetDependenciesResponse{Dependencies: dependencies}, nil
}