/
monitors.go
133 lines (119 loc) · 2.92 KB
/
monitors.go
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package mongo_go_driver
import (
"context"
"fmt"
"strings"
"sync"
"github.com/volcengine/apminsight-server-sdk-go/trace/aitracer"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/bsontype"
"go.mongodb.org/mongo-driver/event"
)
type spanKey struct {
ConnectionID string
RequestID int64
}
type monitor struct {
tracer aitracer.Tracer
spans map[spanKey]aitracer.Span
sync.Mutex
}
func NewMonitor(tracer aitracer.Tracer) *event.CommandMonitor {
if tracer == nil {
panic("tracer is nil")
}
m := &monitor{
tracer: tracer,
spans: make(map[spanKey]aitracer.Span),
}
return &event.CommandMonitor{
Started: m.Started,
Succeeded: m.Succeeded,
Failed: m.Failed,
}
}
func (m *monitor) Started(ctx context.Context, evt *event.CommandStartedEvent) {
if evt == nil {
return
}
callService := fmt.Sprintf("mongodb:%s/%s", getAddr(evt), evt.DatabaseName)
span, _ := m.tracer.StartClientSpanFromContext(ctx, "mongodb.command",
aitracer.ClientResourceAs(aitracer.Mongodb, callService, evt.CommandName))
span.SetTagString("peer.type", "mongodb")
span.SetTagString(aitracer.DbStatement, toJSONString(evt.Command))
span.SetTagString("mongodb.database", evt.DatabaseName)
collection := tryGetCollection(evt)
if collection != "" {
span.SetTagString("mongodb.collection", collection)
}
key := spanKey{
ConnectionID: evt.ConnectionID,
RequestID: evt.RequestID,
}
m.Mutex.Lock()
m.spans[key] = span
m.Mutex.Unlock()
}
func (m *monitor) Succeeded(ctx context.Context, evt *event.CommandSucceededEvent) {
if evt == nil {
return
}
span, ok := m.getSpan(&evt.CommandFinishedEvent)
if !ok {
return
}
span.Finish()
}
func (m *monitor) Failed(ctx context.Context, evt *event.CommandFailedEvent) {
if evt == nil {
return
}
span, ok := m.getSpan(&evt.CommandFinishedEvent)
if !ok {
return
}
span.RecordError(fmt.Errorf(evt.Failure), aitracer.WithErrorKind(aitracer.ErrorKindDbError))
span.SetStatus(aitracer.StatusCodeError)
span.Finish()
}
func getAddr(evt *event.CommandStartedEvent) string {
addr := evt.ConnectionID
if idx := strings.IndexByte(addr, '['); idx >= 0 {
addr = addr[:idx]
}
port := "27017"
if idx := strings.IndexByte(addr, ':'); idx >= 0 {
port = addr[idx+1:]
addr = addr[:idx]
}
return addr + ":" + port
}
func tryGetCollection(evt *event.CommandStartedEvent) string {
kv, err := evt.Command.IndexErr(0)
if err != nil {
return ""
}
if k := kv.Key(); k == evt.CommandName {
if v := kv.Value(); v.Type == bsontype.String {
return v.String()
}
}
return ""
}
func toJSONString(command bson.Raw) string {
b, _ := bson.MarshalExtJSON(command, false, false)
return string(b)
}
func (m *monitor) getSpan(evt *event.CommandFinishedEvent) (aitracer.Span, bool) {
key := spanKey{
ConnectionID: evt.ConnectionID,
RequestID: evt.RequestID,
}
m.Mutex.Lock()
defer m.Mutex.Unlock()
span, ok := m.spans[key]
if ok {
delete(m.spans, key)
}
return span, ok
}