forked from jaegertracing/jaeger
/
unmarshaller.go
81 lines (67 loc) · 2.35 KB
/
unmarshaller.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 kafka
import (
"bytes"
"github.com/gogo/protobuf/jsonpb"
"github.com/gogo/protobuf/proto"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/model/converter/thrift/zipkin"
)
// Unmarshaller decodes a byte array to a span
type Unmarshaller interface {
Unmarshal([]byte) (*model.Span, error)
}
// ProtobufUnmarshaller implements Unmarshaller
type ProtobufUnmarshaller struct{}
// NewProtobufUnmarshaller constructs a ProtobufUnmarshaller
func NewProtobufUnmarshaller() *ProtobufUnmarshaller {
return &ProtobufUnmarshaller{}
}
// Unmarshal decodes a protobuf byte array to a span
func (h *ProtobufUnmarshaller) Unmarshal(msg []byte) (*model.Span, error) {
newSpan := &model.Span{}
err := proto.Unmarshal(msg, newSpan)
return newSpan, err
}
// JSONUnmarshaller implements Unmarshaller
type JSONUnmarshaller struct{}
// NewJSONUnmarshaller constructs a JSONUnmarshaller
func NewJSONUnmarshaller() *JSONUnmarshaller {
return &JSONUnmarshaller{}
}
// Unmarshal decodes a json byte array to a span
func (h *JSONUnmarshaller) Unmarshal(msg []byte) (*model.Span, error) {
newSpan := &model.Span{}
err := jsonpb.Unmarshal(bytes.NewReader(msg), newSpan)
return newSpan, err
}
// ZipkinThriftUnmarshaller implements Unmarshaller
type ZipkinThriftUnmarshaller struct{}
// NewZipkinThriftUnmarshaller constructs a zipkinThriftUnmarshaller
func NewZipkinThriftUnmarshaller() *ZipkinThriftUnmarshaller {
return &ZipkinThriftUnmarshaller{}
}
// Unmarshal decodes a json byte array to a span
func (h *ZipkinThriftUnmarshaller) Unmarshal(msg []byte) (*model.Span, error) {
tSpans, err := zipkin.DeserializeThrift(msg)
if err != nil {
return nil, err
}
mSpans, err := zipkin.ToDomainSpan(tSpans[0])
if err != nil {
return nil, err
}
return mSpans[0], err
}