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exporter_traces.go
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/
exporter_traces.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package cassandraexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/cassandraexporter"
import (
"context"
"fmt"
"time"
"github.com/gocql/gocql"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/pdata/ptrace"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/internal/coreinternal/traceutil"
)
type tracesExporter struct {
client *gocql.Session
logger *zap.Logger
cfg *Config
}
func newTracesExporter(logger *zap.Logger, cfg *Config) (*tracesExporter, error) {
cluster := gocql.NewCluster(cfg.DSN)
session, err := cluster.CreateSession()
cluster.Keyspace = cfg.Keyspace
cluster.Consistency = gocql.Quorum
if err != nil {
return nil, err
}
return &tracesExporter{logger: logger, client: session, cfg: cfg}, nil
}
func initializeTraceKernel(cfg *Config) error {
ctx := context.Background()
cluster := gocql.NewCluster(cfg.DSN)
cluster.Consistency = gocql.Quorum
session, err := cluster.CreateSession()
if err != nil {
return err
}
defer session.Close()
createDatabaseError := session.Query(parseCreateDatabaseSQL(cfg)).WithContext(ctx).Exec()
if createDatabaseError != nil {
return createDatabaseError
}
createLinksTypeError := session.Query(parseCreateLinksTypeSQL(cfg)).WithContext(ctx).Exec()
if createLinksTypeError != nil {
return createLinksTypeError
}
createEventsTypeError := session.Query(parseCreateEventsTypeSQL(cfg)).WithContext(ctx).Exec()
if createEventsTypeError != nil {
return createEventsTypeError
}
createSpanTableError := session.Query(parseCreateSpanTableSQL(cfg)).WithContext(ctx).Exec()
if createSpanTableError != nil {
return createSpanTableError
}
return nil
}
func parseCreateSpanTableSQL(cfg *Config) string {
return fmt.Sprintf(createSpanTableSQL, cfg.Keyspace, cfg.TraceTable, cfg.Compression.Algorithm)
}
func parseCreateEventsTypeSQL(cfg *Config) string {
return fmt.Sprintf(createEventTypeSQL, cfg.Keyspace)
}
func parseCreateLinksTypeSQL(cfg *Config) string {
return fmt.Sprintf(createLinksTypeSQL, cfg.Keyspace)
}
func parseCreateDatabaseSQL(cfg *Config) string {
return fmt.Sprintf(createDatabaseSQL, cfg.Keyspace, cfg.Replication.Class, cfg.Replication.ReplicationFactor)
}
func (e *tracesExporter) Start(_ context.Context, _ component.Host) error {
initializeErr := initializeTraceKernel(e.cfg)
return initializeErr
}
func (e *tracesExporter) Shutdown(_ context.Context) error {
if e.client != nil {
e.client.Close()
}
return nil
}
func (e *tracesExporter) pushTraceData(ctx context.Context, td ptrace.Traces) error {
start := time.Now()
for i := 0; i < td.ResourceSpans().Len(); i++ {
spans := td.ResourceSpans().At(i)
res := spans.Resource()
resAttr := attributesToMap(res.Attributes().AsRaw())
for j := 0; j < spans.ScopeSpans().Len(); j++ {
rs := spans.ScopeSpans().At(j).Spans()
for k := 0; k < rs.Len(); k++ {
r := rs.At(k)
spanAttr := attributesToMap(r.Attributes().AsRaw())
status := r.Status()
insertSpanError := e.client.Query(fmt.Sprintf(insertSpanSQL, e.cfg.Keyspace, e.cfg.TraceTable), r.StartTimestamp().AsTime(),
traceutil.TraceIDToHexOrEmptyString(r.TraceID()),
traceutil.SpanIDToHexOrEmptyString(r.SpanID()),
traceutil.SpanIDToHexOrEmptyString(r.ParentSpanID()),
r.TraceState().AsRaw(),
r.Name(),
traceutil.SpanKindStr(r.Kind()),
resAttr,
spanAttr,
r.EndTimestamp().AsTime().Sub(r.StartTimestamp().AsTime()).Nanoseconds(),
traceutil.StatusCodeStr(status.Code()),
status.Message(),
).WithContext(ctx).Exec()
if insertSpanError != nil {
e.logger.Error("insert span error", zap.Error(insertSpanError))
}
}
}
}
duration := time.Since(start)
e.logger.Debug("insert traces", zap.Int("records", td.SpanCount()),
zap.String("cost", duration.String()))
return nil
}