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package pool
import (
"context"
"log/slog"
"runtime/debug"
"sync"
)
type WorkFunction func(workContext context.Context)
type WorkerPool struct {
concurrencyLimit int
semaphoreChannel chan struct{}
waitGroup sync.WaitGroup
logger *slog.Logger
}
func NewWorkerPool(concurrencyLimit int, logger *slog.Logger) *WorkerPool {
return &WorkerPool{
concurrencyLimit: concurrencyLimit,
semaphoreChannel: make(chan struct{}, concurrencyLimit),
logger: logger,
}
}
func (workerPool *WorkerPool) Submit(workContext context.Context, workFunction WorkFunction) bool {
select {
case workerPool.semaphoreChannel <- struct{}{}:
workerPool.waitGroup.Add(1)
go func() {
defer workerPool.waitGroup.Done()
defer func() { <-workerPool.semaphoreChannel }()
defer func() {
recoveredPanic := recover()
if recoveredPanic != nil {
workerPool.logger.Error(
"worker panic recovered",
"panic_value", recoveredPanic,
"stack_trace", string(debug.Stack()),
)
}
}()
workFunction(workContext)
}()
return true
case <-workContext.Done():
return false
}
}
func (workerPool *WorkerPool) Wait() {
workerPool.waitGroup.Wait()
}
func (workerPool *WorkerPool) ActiveWorkerCount() int {
return len(workerPool.semaphoreChannel)
}
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