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factory.go
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factory.go
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package clickhouse
import (
"database/sql"
"flag"
"fmt"
_ "github.com/ClickHouse/clickhouse-go"
"github.com/spf13/viper"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
dependencyStore "github.com/jaegertracing/jaeger/plugin/storage/badger/dependencystore"
store "github.com/jaegertracing/jaeger/plugin/storage/clickhouse/spanstore"
"github.com/jaegertracing/jaeger/storage/dependencystore"
"github.com/jaegertracing/jaeger/storage/spanstore"
)
// Factory implements storage.Factory for Clickhouse backend.
type Factory struct {
Options *Options
db *sql.DB
logger *zap.Logger
}
// NewFactory creates a new Factory.
func NewFactory() *Factory {
return &Factory{
Options: NewOptions("clickhouse"),
}
}
// Initialize implements storage.Factory
func (f *Factory) Initialize(metricsFactory metrics.Factory, logger *zap.Logger) error {
f.logger = logger
cfg := f.Options.GetPrimary()
if cfg.Encoding != store.EncodingJSON && cfg.Encoding != store.EncodingProto {
return fmt.Errorf("unknown encoding %q, supported: %q, %q", store.EncodingJSON, store.EncodingProto)
}
db, err := sql.Open("clickhouse", cfg.Datasource)
if err != nil {
return err
}
if err := db.Ping(); err != nil {
return err
}
f.db = db
return nil
}
// AddFlags implements plugin.Configurable
func (f *Factory) AddFlags(flagSet *flag.FlagSet) {
f.Options.AddFlags(flagSet)
}
// InitFromViper implements plugin.Configurable
func (f *Factory) InitFromViper(v *viper.Viper) {
f.Options.InitFromViper(v)
}
// CreateSpanReader implements storage.Factory
func (f *Factory) CreateSpanReader() (spanstore.Reader, error) {
return store.NewTraceReader(f.db), nil
}
// CreateSpanWriter implements storage.Factory
func (f *Factory) CreateSpanWriter() (spanstore.Writer, error) {
cfg := f.Options.GetPrimary()
return store.NewSpanWriter(f.db, cfg.Encoding, cfg.WriteBatchDelay, cfg.WriteBatchSize), nil
}
// CreateDependencyReader implements storage.Factory
func (f *Factory) CreateDependencyReader() (dependencystore.Reader, error) {
spanReader, _ := f.CreateSpanReader() // err is always nil
return dependencyStore.NewDependencyStore(spanReader), nil
}