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worker.go
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269 lines (227 loc) · 6.49 KB
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package main
import (
"context"
"encoding/json"
"fmt"
"os"
"os/signal"
"strconv"
"syscall"
"time"
"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 DPromptsWorker struct {
river.WorkerDefaults[DPromptsJobArgs]
db *pgxpool.Pool // Database pool
}
func (w *DPromptsWorker) Timeout(job *river.Job[DPromptsJobArgs]) time.Duration {
// Set the timeout to 5 minutes
return 5 * time.Minute
}
func humanizeDuration(d time.Duration) string {
switch {
case d < time.Second:
return fmt.Sprintf("%dms", d.Milliseconds())
case d < time.Minute:
return fmt.Sprintf("%.1fs", d.Seconds())
default:
m := int(d.Minutes())
s := int(d.Seconds()) % 60
return fmt.Sprintf("%dm %ds", m, s)
}
}
func (w *DPromptsWorker) Work(ctx context.Context, job *river.Job[DPromptsJobArgs]) error {
jobStart := time.Now()
jobID := strconv.FormatInt(job.ID, 10)
var groupName string
if len(job.Metadata) > 0 {
var meta map[string]any
if err := json.Unmarshal(job.Metadata, &meta); err == nil {
if v, ok := meta["group_name"].(string); ok {
groupName = v
}
}
}
log.Info().
Str("job_id", jobID).
Msg("Job started")
homeDir, err := os.UserHomeDir()
if err != nil {
log.Error().Err(err).Msg("Unable to determine home directory for config file")
return err
}
configPath := homeDir + string(os.PathSeparator) + ".dprompts.toml"
tx, err := w.db.Begin(ctx)
if err != nil {
return err
}
defer tx.Rollback(ctx)
groupID, err := w.resolveGroup(ctx, tx, jobID, groupName)
if err != nil {
return err
}
results := make(map[string]string)
var ollamaTotal time.Duration
var dbTotal time.Duration
// ---- subtasks ----
for i, sub := range job.Args.SubTasks {
log.Info().
Str("job_id", jobID).
Int("subtask", i).
Any("metadata", sub.Metadata).
Msg("Subtask started")
ollamaStart := time.Now()
response, err := CallOllama(
sub.Prompt,
sub.Schema,
configPath,
job.Args.BasePrompt,
)
ollamaDur := time.Since(ollamaStart)
ollamaTotal += ollamaDur
if err != nil {
log.Error().
Err(err).
Str("job_id", jobID).
Int("subtask", i).
Msg("Subtask failed")
return err
}
results[fmt.Sprintf("subtask_%d", i)] = response
log.Info().
Str("job_id", jobID).
Int("subtask", i).
Str("time_taken_by_ollama", humanizeDuration(ollamaDur)).
Msg("Subtask completed")
}
// ---- DB work ----
dbStart := time.Now()
jsonResponse, err := json.Marshal(results)
if err != nil {
return err
}
if err := w.insertResult(ctx, tx, job.ID, jsonResponse, groupID); err != nil {
return err
}
if _, err := river.JobCompleteTx[*riverpgxv5.Driver](ctx, tx, job); err != nil {
return err
}
if err := tx.Commit(ctx); err != nil {
return err
}
dbTotal += time.Since(dbStart)
// ---- final summary ----
totalTime := time.Since(jobStart)
log.Info().
Str("job_id", jobID).
Int("subtasks", len(job.Args.SubTasks)).
Str("ollama_total", humanizeDuration(ollamaTotal)).
Str("db_total", humanizeDuration(dbTotal)).
Str("total_time", humanizeDuration(totalTime)).
Msg("Job completed")
return nil
}
func RegisterWorkers(db *pgxpool.Pool) *river.Workers {
workers := river.NewWorkers()
river.AddWorker(workers, &DPromptsWorker{db: db})
return workers
}
func createWorkerClient(
driver *riverpgxv5.Driver,
workers *river.Workers,
concurrentWorkers int) (*river.Client[pgx.Tx], error) {
log.Info().
Int("concurrent_workers", concurrentWorkers).
Msg("Initializing River worker client")
return river.NewClient[pgx.Tx](driver, &river.Config{
Queues: map[string]river.QueueConfig{
river.QueueDefault: {MaxWorkers: concurrentWorkers},
},
Workers: workers,
CompletedJobRetentionPeriod: 72 * time.Hour,
})
}
func RunWorker(ctx context.Context, driver *riverpgxv5.Driver, cancel context.CancelFunc, db *pgxpool.Pool) {
homeDir, err := os.UserHomeDir()
if err != nil {
log.Fatal().Err(err).Msg("Unable to determine home directory")
}
configPath := homeDir + string(os.PathSeparator) + ".dprompts.toml"
workerConfig, err := LoadWorkerConfig(configPath)
if err != nil {
log.Fatal().Err(err).Msg("Failed to load worker config")
}
workers := RegisterWorkers(db)
riverClient, err := createWorkerClient(driver, workers, workerConfig.ConcurrentWorkers)
if err != nil {
log.Fatal().Err(err).Msg("Failed to create River client")
}
go func() {
stop := make(chan os.Signal, 1)
signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
<-stop
log.Info().Msg("Shutting down...")
if err := riverClient.Stop(ctx); err != nil {
log.Fatal().Err(err).Msg("Failed to stop client")
}
cancel()
}()
log.Info().Msg("Worker started. Press Ctrl+C to exit.")
if err := riverClient.Start(ctx); err != nil {
if err != context.Canceled {
log.Fatal().Err(err).Msg("Client service error")
}
}
<-ctx.Done()
log.Info().Msg("Worker shut down.")
}
// resolveGroup ensures the group exists and returns its ID (or nil if no group)
func (w *DPromptsWorker) resolveGroup(ctx context.Context, tx pgx.Tx, jobID string, groupName string) (*int, error) {
if groupName == "" {
log.Info().Str("job_id", jobID).Msg("No group name provided, skipping group creation")
return nil, nil
}
var id int
err := tx.QueryRow(ctx, `
INSERT INTO dprompt_groups (group_name)
VALUES ($1)
ON CONFLICT (group_name) DO NOTHING
RETURNING id
`, groupName).Scan(&id)
if err != nil {
if err == pgx.ErrNoRows {
// Group already exists, fetch its ID
err = tx.QueryRow(ctx, `SELECT id FROM dprompt_groups WHERE group_name = $1`, groupName).Scan(&id)
if err != nil {
log.Error().Err(err).Str("job_id", jobID).Str("group_name", groupName).Msg("Failed to fetch existing group id")
return nil, err
}
} else {
log.Error().Err(err).Str("job_id", jobID).Str("group_name", groupName).Msg("Failed to create group")
return nil, err
}
}
return &id, nil
}
// insertResult inserts or updates a dprompt result for a job
func (w *DPromptsWorker) insertResult(ctx context.Context, tx pgx.Tx, jobID int64, jsonResponse []byte, groupID *int) error {
_, err := tx.Exec(ctx,
`INSERT INTO dprompts_results (job_id, response, group_id)
VALUES ($1, $2, $3)
ON CONFLICT (job_id)
DO UPDATE SET response = EXCLUDED.response,
group_id = EXCLUDED.group_id`,
jobID,
jsonResponse,
groupID, // nil = NULL if no group
)
if err != nil {
log.Error().Err(err).Msg("Failed to store Ollama result in database")
return err
}
return nil
}