/
query_service.go
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/
query_service.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 querysvc
import (
"context"
"errors"
"time"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/model/adjuster"
"github.com/jaegertracing/jaeger/storage"
"github.com/jaegertracing/jaeger/storage/dependencystore"
"github.com/jaegertracing/jaeger/storage/spanstore"
)
var errNoArchiveSpanStorage = errors.New("archive span storage was not configured")
const (
defaultMaxClockSkewAdjust = time.Second
)
// QueryServiceOptions has optional members of QueryService
type QueryServiceOptions struct {
ArchiveSpanReader spanstore.Reader
ArchiveSpanWriter spanstore.Writer
Adjuster adjuster.Adjuster
}
// StorageCapabilities is a feature flag for query service
type StorageCapabilities struct {
ArchiveStorage bool `json:"archiveStorage"`
// SupportRegex bool
// SupportTagFilter bool
}
// QueryService contains span utils required by the query-service.
type QueryService struct {
spanReader spanstore.Reader
dependencyReader dependencystore.Reader
options QueryServiceOptions
}
// NewQueryService returns a new QueryService.
func NewQueryService(spanReader spanstore.Reader, dependencyReader dependencystore.Reader, options QueryServiceOptions) *QueryService {
qsvc := &QueryService{
spanReader: spanReader,
dependencyReader: dependencyReader,
options: options,
}
if qsvc.options.Adjuster == nil {
qsvc.options.Adjuster = adjuster.Sequence(StandardAdjusters(defaultMaxClockSkewAdjust)...)
}
return qsvc
}
// GetTrace is the queryService implementation of spanstore.Reader.GetTrace
func (qs QueryService) GetTrace(ctx context.Context, traceID model.TraceID) (*model.Trace, error) {
trace, err := qs.spanReader.GetTrace(ctx, traceID)
if errors.Is(err, spanstore.ErrTraceNotFound) {
if qs.options.ArchiveSpanReader == nil {
return nil, err
}
trace, err = qs.options.ArchiveSpanReader.GetTrace(ctx, traceID)
}
return trace, err
}
// GetServices is the queryService implementation of spanstore.Reader.GetServices
func (qs QueryService) GetServices(ctx context.Context) ([]string, error) {
return qs.spanReader.GetServices(ctx)
}
// GetOperations is the queryService implementation of spanstore.Reader.GetOperations
func (qs QueryService) GetOperations(
ctx context.Context,
query spanstore.OperationQueryParameters,
) ([]spanstore.Operation, error) {
return qs.spanReader.GetOperations(ctx, query)
}
// FindTraces is the queryService implementation of spanstore.Reader.FindTraces
func (qs QueryService) FindTraces(ctx context.Context, query *spanstore.TraceQueryParameters) ([]*model.Trace, error) {
return qs.spanReader.FindTraces(ctx, query)
}
// ArchiveTrace is the queryService utility to archive traces.
func (qs QueryService) ArchiveTrace(ctx context.Context, traceID model.TraceID) error {
if qs.options.ArchiveSpanWriter == nil {
return errNoArchiveSpanStorage
}
trace, err := qs.GetTrace(ctx, traceID)
if err != nil {
return err
}
var writeErrors []error
for _, span := range trace.Spans {
err := qs.options.ArchiveSpanWriter.WriteSpan(ctx, span)
if err != nil {
writeErrors = append(writeErrors, err)
}
}
return errors.Join(writeErrors...)
}
// Adjust applies adjusters to the trace.
func (qs QueryService) Adjust(trace *model.Trace) (*model.Trace, error) {
return qs.options.Adjuster.Adjust(trace)
}
// GetDependencies implements dependencystore.Reader.GetDependencies
func (qs QueryService) GetDependencies(ctx context.Context, endTs time.Time, lookback time.Duration) ([]model.DependencyLink, error) {
return qs.dependencyReader.GetDependencies(ctx, endTs, lookback)
}
// GetCapabilities returns the features supported by the query service.
func (qs QueryService) GetCapabilities() StorageCapabilities {
return StorageCapabilities{
ArchiveStorage: qs.options.hasArchiveStorage(),
}
}
// InitArchiveStorage tries to initialize archive storage reader/writer if storage factory supports them.
func (opts *QueryServiceOptions) InitArchiveStorage(storageFactory storage.Factory, logger *zap.Logger) bool {
archiveFactory, ok := storageFactory.(storage.ArchiveFactory)
if !ok {
logger.Info("Archive storage not supported by the factory")
return false
}
reader, err := archiveFactory.CreateArchiveSpanReader()
if errors.Is(err, storage.ErrArchiveStorageNotConfigured) || errors.Is(err, storage.ErrArchiveStorageNotSupported) {
logger.Info("Archive storage not created", zap.String("reason", err.Error()))
return false
}
if err != nil {
logger.Error("Cannot init archive storage reader", zap.Error(err))
return false
}
writer, err := archiveFactory.CreateArchiveSpanWriter()
if errors.Is(err, storage.ErrArchiveStorageNotConfigured) || errors.Is(err, storage.ErrArchiveStorageNotSupported) {
logger.Info("Archive storage not created", zap.String("reason", err.Error()))
return false
}
if err != nil {
logger.Error("Cannot init archive storage writer", zap.Error(err))
return false
}
opts.ArchiveSpanReader = reader
opts.ArchiveSpanWriter = writer
return true
}
// hasArchiveStorage returns true if archive storage reader/writer are initialized.
func (opts *QueryServiceOptions) hasArchiveStorage() bool {
return opts.ArchiveSpanReader != nil && opts.ArchiveSpanWriter != nil
}