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package main
import (
"bufio"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"os"
"strings"
"github.com/jackc/pgx/v5"
"github.com/jackc/pgx/v5/pgxpool"
"github.com/riverqueue/river"
"github.com/riverqueue/river/riverdriver/riverpgxv5"
"github.com/rs/zerolog/log"
)
type BulkJob struct {
SubTasks []DPromptsSubTask `json:"sub_tasks"`
BasePrompt string `json:"base_prompt,omitempty"`
}
// RunClient enqueues a job with args and metadata as JSON strings.
func RunClient(ctx context.Context, driver *riverpgxv5.Driver, argsJSON string, metadataJSON string, bulkFile string, dbPool *pgxpool.Pool) {
riverClient, err := newRiverClient(driver)
if err != nil {
log.Fatal().Err(err).Msg("Failed to create River client")
}
if bulkFile != "" {
if err := enqueueBulkJobsFromFile(ctx, riverClient, dbPool, bulkFile); err != nil {
log.Fatal().Err(err).Msg("Bulk insert failed")
}
return
}
if argsJSON == "" {
log.Fatal().Msg("Args JSON is required in client mode")
}
var args DPromptsJobArgs
if err := json.Unmarshal([]byte(argsJSON), &args); err != nil {
log.Fatal().Err(err).Msg("Failed to parse args JSON")
}
var insertOpts *river.InsertOpts
if metadataJSON != "" {
var metadata map[string]interface{}
if err := json.Unmarshal([]byte(metadataJSON), &metadata); err != nil {
log.Fatal().Err(err).Msg("Failed to parse metadata JSON")
}
metadataBytes, err := json.Marshal(metadata)
if err != nil {
log.Fatal().Err(err).Msg("Failed to marshal metadata to JSON bytes")
}
insertOpts = &river.InsertOpts{
Metadata: metadataBytes,
}
}
if _, err := riverClient.Insert(ctx, &args, insertOpts); err != nil {
log.Fatal().Err(err).Msg("Failed to enqueue job")
}
log.Info().
Interface("args", args).
Interface("metadata", insertOpts).
Msg("Enqueued job")
}
func enqueueBulkJobsFromFile(ctx context.Context, riverClient *river.Client[pgx.Tx], dbPool *pgxpool.Pool, filename string) error {
file, err := os.Open(filename)
if err != nil {
return err
}
defer file.Close()
decoder := json.NewDecoder(bufio.NewReader(file))
// Peek first non-whitespace token
tok, err := nextNonSpaceToken(decoder)
if err != nil {
return fmt.Errorf("cannot read file: %w", err)
}
// NDJSON format (each line = JSON object)
if tok != json.Delim('[') {
return processNDJSON(ctx, decoder, riverClient, dbPool)
}
return processJSONArray(ctx, decoder, riverClient, dbPool)
}
// ------ JSON ARRAY VERSION ------
func processJSONArray(ctx context.Context, decoder *json.Decoder, riverClient *river.Client[pgx.Tx], dbPool *pgxpool.Pool) error {
const batchSize = 500
batch := make([]river.InsertManyParams, 0, batchSize)
total := 0
count := 0
for decoder.More() {
var job BulkJob
if err := decoder.Decode(&job); err != nil {
return fmt.Errorf("decode error at item %d: %w", total, err)
}
params, err := toInsertParams(job)
if err != nil {
log.Error().
Int("job_index", total).
Err(err).
Msg("Failed to convert job to InsertManyParams")
return err
}
batch = append(batch, params)
total++
count++
if total%50 == 0 {
log.Info().Msgf("Loaded %d jobs into batch...", total)
}
if count == batchSize {
log.Info().Msgf("Inserting batch of %d jobs (total so far: %d)", batchSize, total)
if err := insertBatch(ctx, riverClient, dbPool, batch); err != nil {
log.Error().Err(err).Msg("Failed to insert batch")
return err
}
batch = batch[:0]
count = 0
}
}
if len(batch) > 0 {
log.Info().Msgf("Inserting final batch of %d jobs (total: %d)", len(batch), total)
if err := insertBatch(ctx, riverClient, dbPool, batch); err != nil {
log.Error().Err(err).Msg("Failed to insert final batch")
return err
}
}
log.Info().Msgf("Bulk insert complete. Total jobs inserted: %d", total)
return nil
}
// ------ NDJSON VERSION ------
func processNDJSON(ctx context.Context, decoder *json.Decoder, riverClient *river.Client[pgx.Tx], dbPool *pgxpool.Pool) error {
const batchSize = 500
batch := make([]river.InsertManyParams, 0, batchSize)
total := 0
count := 0
for {
var job BulkJob
if err := decoder.Decode(&job); err != nil {
if errors.Is(err, io.EOF) {
break
}
return err
}
params, err := toInsertParams(job)
if err != nil {
log.Error().
Int("job_index", total).
Err(err).
Msg("Failed to convert job to InsertManyParams")
return err
}
batch = append(batch, params)
total++
count++
if total%50 == 0 {
log.Info().Msgf("Loaded %d jobs into batch...", total)
}
if count == batchSize {
log.Info().Msgf("Inserting batch of %d jobs (total so far: %d)", batchSize, total)
if err := insertBatch(ctx, riverClient, dbPool, batch); err != nil {
log.Error().Err(err).Msg("Failed to insert batch")
return err
}
batch = batch[:0]
count = 0
}
}
if len(batch) > 0 {
log.Info().Msgf("Inserting final batch of %d jobs (total: %d)", len(batch), total)
if err := insertBatch(ctx, riverClient, dbPool, batch); err != nil {
log.Error().Err(err).Msg("Failed to insert final batch")
return err
}
}
log.Info().Msgf("Bulk insert complete. Total jobs inserted: %d", total)
return nil
}
// Helper: Read first non-space token
func nextNonSpaceToken(dec *json.Decoder) (json.Token, error) {
for {
t, err := dec.Token()
if err != nil {
return nil, err
}
if _, ok := t.(json.Delim); ok || t != nil {
return t, nil
}
}
}
func toInsertParams(job BulkJob) (river.InsertManyParams, error) {
if len(job.SubTasks) == 0 {
return river.InsertManyParams{}, fmt.Errorf("job has no sub_tasks")
}
for i, st := range job.SubTasks {
if strings.TrimSpace(st.Prompt) == "" {
return river.InsertManyParams{}, fmt.Errorf("sub_task[%d] has empty prompt", i)
}
}
var opts *river.InsertOpts
if job.SubTasks[0].Metadata != nil {
metadataBytes, _ := json.Marshal(job.SubTasks[0].Metadata)
opts = &river.InsertOpts{
Metadata: metadataBytes,
}
}
return river.InsertManyParams{
Args: DPromptsJobArgs{
BasePrompt: job.BasePrompt,
SubTasks: job.SubTasks,
},
InsertOpts: opts,
}, nil
}
func insertBatch(
ctx context.Context,
riverClient *river.Client[pgx.Tx],
dbPool *pgxpool.Pool,
batch []river.InsertManyParams,
) error {
tx, err := dbPool.Begin(ctx)
if err != nil {
return err
}
defer func() {
_ = tx.Rollback(ctx) // safe no-op if already committed
}()
if _, err := riverClient.InsertManyTx(ctx, tx, batch); err != nil {
return err
}
if err := tx.Commit(ctx); err != nil {
return err
}
return nil
}
func newRiverClient(driver *riverpgxv5.Driver) (*river.Client[pgx.Tx], error) {
return river.NewClient[pgx.Tx](driver, &river.Config{})
}