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task.go
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task.go
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package usecase
import (
"context"
"sync"
"github.com/hashicorp/go-multierror"
"github.com/m-mizutani/goerr"
"github.com/m-mizutani/overseer/pkg/domain/model"
"github.com/m-mizutani/overseer/pkg/infra"
"github.com/m-mizutani/overseer/pkg/utils"
)
const (
concurrency = 10
)
func RunTasks(ctx context.Context, clients *infra.Clients, tasks []*model.Task, tgt *model.Target) error {
ctx, _ = utils.CtxRequestID(ctx)
errCh := make(chan error, len(tasks))
taskCh := make(chan *model.Task, len(tasks))
var wg sync.WaitGroup
for i := 0; i < concurrency; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for task := range taskCh {
if err := runTask(ctx, clients, task); err != nil {
err = goerr.Wrap(err).With("task", task)
utils.HandleError(ctx, "fail to run task", err)
errCh <- err
}
}
}()
}
for _, task := range tasks {
if !tgt.Contains(task) {
continue
}
taskCh <- task
}
close(taskCh)
wg.Wait()
close(errCh)
var resultErr error
for err := range errCh {
resultErr = multierror.Append(resultErr, err)
}
return resultErr
}
func runTask(ctx context.Context, clients *infra.Clients, task *model.Task) error {
utils.CtxLogger(ctx).Info("Start task",
"title", task.Title,
"description", task.Description,
)
rows, err := clients.BigQuery().Query(ctx, task.Query)
if err != nil {
return err
}
if len(rows) == 0 {
return nil
}
alert := &model.Alert{
ID: task.ID,
Title: task.Title,
Description: task.Description,
}
for _, row := range rows {
result := make(map[string]any)
for key, value := range row {
result[key] = value
}
alert.Results = append(alert.Results, result)
}
utils.CtxLogger(ctx).Info("detected alert", "alert", alert)
if err := clients.Emitter().Emit(ctx, alert); err != nil {
return err
}
return nil
}