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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.fs4.mplex;
import com.yahoo.io.FatalErrorHandler;
import com.yahoo.io.Listener;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Pool of com.yahoo.io.Listener instances for shared use by Vespa backend
* searchers.
*
* @author baldersheim
* @since 5.3.0
*/
public final class ListenerPool {
private final static Logger logger = Logger.getLogger(ListenerPool.class.getName());
private final List<Listener> listeners;
public ListenerPool(String name, int numListeners) {
listeners = new ArrayList<>(numListeners);
FatalErrorHandler fatalErrorHandler = new FatalErrorHandler();
for (int i = 0; i < numListeners; i++) {
Listener listener = new Listener(name + "-" + i);
listener.setFatalErrorHandler(fatalErrorHandler);
listener.start();
listeners.add(listener);
}
}
public Listener get(int index) {
return listeners.get(index);
}
public int size() {
return listeners.size();
}
public void close() {
for (Listener listener : listeners) {
listener.interrupt();
}
try {
for (Listener listener : listeners) {
listener.join();
}
} catch (InterruptedException e) {
logger.log(Level.WARNING, "Got interrupted", e);
Thread.currentThread().interrupt();
}
}
}
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