| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 tracing |
| |
| import ( |
| "go.opentelemetry.io/otel/trace" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pixiu/pkg/common/constant" |
| "github.com/apache/dubbo-go-pixiu/pixiu/pkg/common/extension/filter" |
| contexthttp "github.com/apache/dubbo-go-pixiu/pixiu/pkg/context/http" |
| "github.com/apache/dubbo-go-pixiu/pixiu/pkg/server" |
| ) |
| |
| const TraceIDInHeader = "dubbo-go-pixiu-trace-id" |
| |
| // nolint |
| func init() { |
| filter.RegisterHttpFilter(&Plugin{}) |
| } |
| |
| // tracerFilter is a filter for tracer |
| type ( |
| Plugin struct { |
| } |
| |
| TraceFilterFactory struct { |
| } |
| |
| TraceFilter struct { |
| span trace.Span |
| } |
| |
| Config struct{} |
| ) |
| |
| func (ap *Plugin) Kind() string { |
| return constant.TracingFilter |
| } |
| |
| func (ap *Plugin) CreateFilterFactory() (filter.HttpFilterFactory, error) { |
| return &TraceFilterFactory{}, nil |
| } |
| |
| func (m *TraceFilterFactory) Config() interface{} { |
| return &Config{} |
| } |
| |
| func (m *TraceFilterFactory) Apply() error { |
| return nil |
| } |
| |
| func (mf *TraceFilterFactory) PrepareFilterChain(ctx *contexthttp.HttpContext, chain filter.FilterChain) error { |
| t := &TraceFilter{} |
| chain.AppendDecodeFilters(t) |
| chain.AppendEncodeFilters(t) |
| return nil |
| } |
| |
| // Docode execute tracerFilter filter logic. |
| func (f *TraceFilter) Decode(hc *contexthttp.HttpContext) filter.FilterStatus { |
| spanName := "HTTP-" + hc.Request.Method |
| tr := server.GetTraceDriverManager().GetDriver().Tracer("tracing.HTTPProtocol") |
| ctxWithId, span := tr.Start(hc.Ctx, spanName) |
| |
| hc.Request = hc.Request.WithContext(ctxWithId) |
| f.span = span |
| return filter.Continue |
| } |
| |
| func (f *TraceFilter) Encode(hc *contexthttp.HttpContext) filter.FilterStatus { |
| f.span.End() |
| return filter.Continue |
| } |