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package cask.util
import scala.collection.mutable
import scala.concurrent.ExecutionContext
/**
* A simple asynchronous actor, allowing safe concurrent asynchronous processing
* of queued items. `run` handles items in batches, to allow for batch
* processing optimizations to be used where relevant.
*/
abstract class BatchActor[T]()(implicit ec: ExecutionContext,
log: Logger) {
def run(items: Seq[T]): Unit
private val queue = new mutable.Queue[T]()
private var scheduled = false
def send(t: T): Unit = synchronized{
queue.enqueue(t)
if (!scheduled){
scheduled = true
ec.execute(() => runWithItems())
}
}
private[this] def runWithItems(): Unit = {
val items = synchronized(queue.dequeueAll(_ => true))
try run(items)
catch{case e: Throwable => log.exception(e)}
synchronized{
if (queue.nonEmpty) ec.execute(() => runWithItems())
else{
assert(scheduled)
scheduled = false
}
}
}
}
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