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worker_job_runner.go
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worker_job_runner.go
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package gc
import (
"sync"
"time"
"code.cloudfoundry.org/lager"
"github.com/concourse/atc/worker"
)
type workerJobRunner struct {
workerProvider worker.WorkerProvider
workers map[string]worker.Worker
workersL *sync.Mutex
workersSyncInterval time.Duration
}
type Job interface {
Name() string
Run(worker.Worker)
}
type JobFunc func(worker.Worker)
func (f JobFunc) Name() string { return "" }
func (f JobFunc) Run(workerClient worker.Worker) {
f(workerClient)
}
//go:generate counterfeiter . WorkerJobRunner
type WorkerJobRunner interface {
Try(lager.Logger, string, Job)
}
func NewWorkerJobRunner(
logger lager.Logger,
workerProvider worker.WorkerProvider,
workersSyncInterval time.Duration,
) WorkerJobRunner {
runner := &workerJobRunner{
workerProvider: workerProvider,
workers: map[string]worker.Worker{},
workersL: &sync.Mutex{},
workersSyncInterval: workersSyncInterval,
}
go runner.syncWorkersLoop(logger)
return runner
}
func (runner *workerJobRunner) Try(logger lager.Logger, workerName string, job Job) {
logger = logger.Session("queue", lager.Data{
"worker-name": workerName,
"job-name": job.Name(),
})
runner.workersL.Lock()
workerClient, found := runner.workers[workerName]
runner.workersL.Unlock()
if !found {
// drop the job on the floor; it'll be queued up again later
//TODO: move this over to container collector, as we only need the
//worker to be running if the container to be GC'd is hijacked
//so we shouldn't be dropping every job for non-running workers
logger.Info("worker-not-found")
return
}
go func() {
job.Run(workerClient)
}()
}
func (runner *workerJobRunner) syncWorkersLoop(logger lager.Logger) {
runner.syncWorkers(logger)
ticker := time.NewTicker(runner.workersSyncInterval)
for {
select {
case <-ticker.C:
runner.syncWorkers(logger)
}
}
}
func (runner *workerJobRunner) syncWorkers(logger lager.Logger) {
workers, err := runner.workerProvider.RunningWorkers(logger)
if err != nil {
logger.Error("failed-to-get-running-workers", err)
return
}
workerMap := map[string]worker.Worker{}
for _, worker := range workers {
workerMap[worker.Name()] = worker
}
runner.workersL.Lock()
runner.workers = workerMap
runner.workersL.Unlock()
}