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interface.go
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interface.go
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// Copyright 2023 The Kelemetry 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 jaegerbackend
import (
"context"
"encoding/json"
"time"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/storage/spanstore"
"k8s.io/utils/clock"
tftree "github.com/kubewharf/kelemetry/pkg/frontend/tf/tree"
"github.com/kubewharf/kelemetry/pkg/manager"
"github.com/kubewharf/kelemetry/pkg/metrics"
)
func init() {
manager.Global.Provide("jaeger-backend", manager.Ptr[Backend](&mux{
Mux: manager.NewMux("jaeger-backend", false),
}))
}
type Backend interface {
// Lists the thumbnail previews of all traces.
List(
ctx context.Context,
query *spanstore.TraceQueryParameters,
) ([]*TraceThumbnail, error)
// Gets the full tree of a trace based on the identifier returned from a previous call to List.
//
// traceId is the fake trace ID that should be presented to the user.
//
// startTime and endTime are only for optimization hint.
// The implementation is allowed to return spans beyond the range.
Get(
ctx context.Context,
identifier json.RawMessage,
traceId model.TraceID,
startTime, endTime time.Time,
) (*model.Trace, error)
}
type TraceThumbnail struct {
// Identifier is a serializable object that identifies the trace in GetTrace calls.
Identifier any
Spans *tftree.SpanTree
}
func (tt *TraceThumbnail) GetSpans() *tftree.SpanTree { return tt.Spans }
func (tt *TraceThumbnail) GetMetadata() any { return tt.Identifier }
func (tt *TraceThumbnail) FromThumbnail(src *TraceThumbnail) { *tt = *src }
type mux struct {
*manager.Mux
Clock clock.Clock
ListMetric *metrics.Metric[*listMetric]
GetMetric *metrics.Metric[*getMetric]
}
type (
listMetric struct{}
getMetric struct{}
)
func (*listMetric) MetricName() string { return "jaeger_backend_list" }
func (*getMetric) MetricName() string { return "jaeger_backend_get" }
func (mux *mux) List(
ctx context.Context,
query *spanstore.TraceQueryParameters,
) ([]*TraceThumbnail, error) {
defer mux.ListMetric.DeferCount(mux.Clock.Now(), &listMetric{})
return mux.Impl().(Backend).List(ctx, query)
}
func (mux *mux) Get(
ctx context.Context,
identifier json.RawMessage,
traceId model.TraceID,
startTime, endTime time.Time,
) (*model.Trace, error) {
defer mux.GetMetric.DeferCount(mux.Clock.Now(), &getMetric{})
return mux.Impl().(Backend).Get(ctx, identifier, traceId, startTime, endTime)
}