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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.server.jetty;
import com.yahoo.component.annotation.Inject;
import com.yahoo.component.AbstractComponent;
import com.yahoo.concurrent.DaemonThreadFactory;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;
/**
* Separate janitor threadpool for tasks that cannot be executed on the jdisc default threadpool due to risk of deadlock.
* Modelled as a separate component as the underlying executor must be available across {@link JettyHttpServer} instances.
*
* @author bjorncs
*/
public class Janitor extends AbstractComponent {
private static final Logger log = Logger.getLogger(Janitor.class.getName());
private final ExecutorService executor;
@Inject
public Janitor() {
int threadPoolSize = Math.max(2, Runtime.getRuntime().availableProcessors()/4);
log.fine("Creating janitor executor with " + threadPoolSize + " threads");
this.executor = Executors.newFixedThreadPool(threadPoolSize, new DaemonThreadFactory("jdisc-janitor-"));
}
public void scheduleTask(Runnable task) { executor.execute(task); }
@Override
public void deconstruct() {
try {
executor.shutdown();
if (!executor.awaitTermination(10, TimeUnit.SECONDS)) {
log.warning("Failed to shutdown janitor in time");
}
} catch (InterruptedException e) {
log.warning("Interrupted while shutting down janitor");
Thread.currentThread().interrupt();
}
}
}
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