factory.go

// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0

//go:generate mdatagen metadata.yaml

package clickhouseexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/clickhouseexporter"

import (
	"context"
	"fmt"
	"time"

	"go.opentelemetry.io/collector/component"
	"go.opentelemetry.io/collector/exporter"
	"go.opentelemetry.io/collector/exporter/exporterhelper"

	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/clickhouseexporter/internal/metadata"
)

// NewFactory creates a factory for Elastic exporter.
func NewFactory() exporter.Factory {
	return exporter.NewFactory(
		metadata.Type,
		createDefaultConfig,
		exporter.WithLogs(createLogsExporter, metadata.LogsStability),
		exporter.WithTraces(createTracesExporter, metadata.TracesStability),
		exporter.WithMetrics(createMetricExporter, metadata.MetricsStability),
	)
}

func createDefaultConfig() component.Config {
	queueSettings := exporterhelper.NewDefaultQueueSettings()
	queueSettings.NumConsumers = 1

	return &Config{
		TimeoutSettings:  exporterhelper.NewDefaultTimeoutSettings(),
		QueueSettings:    queueSettings,
		RetrySettings:    exporterhelper.NewDefaultRetrySettings(),
		ConnectionParams: map[string]string{},
		Database:         defaultDatabase,
		LogsTableName:    "otel_logs",
		TracesTableName:  "otel_traces",
		MetricsTableName: "otel_metrics",
		TTL:              0,
	}
}

// createLogsExporter creates a new exporter for logs.
// Logs are directly insert into clickhouse.
func createLogsExporter(
	ctx context.Context,
	set exporter.CreateSettings,
	cfg component.Config,
) (exporter.Logs, error) {
	c := cfg.(*Config)
	exporter, err := newLogsExporter(set.Logger, c)
	if err != nil {
		return nil, fmt.Errorf("cannot configure clickhouse logs exporter: %w", err)
	}

	return exporterhelper.NewLogsExporter(
		ctx,
		set,
		cfg,
		exporter.pushLogsData,
		exporterhelper.WithStart(exporter.start),
		exporterhelper.WithShutdown(exporter.shutdown),
		exporterhelper.WithTimeout(c.TimeoutSettings),
		exporterhelper.WithQueue(c.QueueSettings),
		exporterhelper.WithRetry(c.RetrySettings),
	)
}

// createTracesExporter creates a new exporter for traces.
// Traces are directly insert into clickhouse.
func createTracesExporter(
	ctx context.Context,
	set exporter.CreateSettings,
	cfg component.Config,
) (exporter.Traces, error) {
	c := cfg.(*Config)
	exporter, err := newTracesExporter(set.Logger, c)
	if err != nil {
		return nil, fmt.Errorf("cannot configure clickhouse traces exporter: %w", err)
	}

	return exporterhelper.NewTracesExporter(
		ctx,
		set,
		cfg,
		exporter.pushTraceData,
		exporterhelper.WithStart(exporter.start),
		exporterhelper.WithShutdown(exporter.shutdown),
		exporterhelper.WithTimeout(c.TimeoutSettings),
		exporterhelper.WithQueue(c.QueueSettings),
		exporterhelper.WithRetry(c.RetrySettings),
	)
}

func createMetricExporter(
	ctx context.Context,
	set exporter.CreateSettings,
	cfg component.Config,
) (exporter.Metrics, error) {
	c := cfg.(*Config)
	exporter, err := newMetricsExporter(set.Logger, c)
	if err != nil {
		return nil, fmt.Errorf("cannot configure clickhouse metrics exporter: %w", err)
	}

	return exporterhelper.NewMetricsExporter(
		ctx,
		set,
		cfg,
		exporter.pushMetricsData,
		exporterhelper.WithStart(exporter.start),
		exporterhelper.WithShutdown(exporter.shutdown),
		exporterhelper.WithTimeout(c.TimeoutSettings),
		exporterhelper.WithQueue(c.QueueSettings),
		exporterhelper.WithRetry(c.RetrySettings),
	)
}

func generateTTLExpr(ttlDays uint, ttl time.Duration) string {
	if ttlDays > 0 {
		return fmt.Sprintf(`TTL toDateTime(Timestamp) + toIntervalDay(%d)`, ttlDays)
	}

	if ttl > 0 {
		switch {
		case ttl%(24*time.Hour) == 0:
			return fmt.Sprintf(`TTL toDateTime(Timestamp) + toIntervalDay(%d)`, ttl/(24*time.Hour))
		case ttl%(time.Hour) == 0:
			return fmt.Sprintf(`TTL toDateTime(Timestamp) + toIntervalHour(%d)`, ttl/time.Hour)
		case ttl%(time.Minute) == 0:
			return fmt.Sprintf(`TTL toDateTime(Timestamp) + toIntervalMinute(%d)`, ttl/time.Minute)
		default:
			return fmt.Sprintf(`TTL toDateTime(Timestamp) + toIntervalSecond(%d)`, ttl/time.Second)
		}
	}
	return ""
}