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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.logging;
import com.yahoo.concurrent.DaemonThreadFactory;
import java.time.Clock;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
/**
* Abstract class that deals with storing event entries on disk and making sure all stored
* entries are eventually sent
*
* @author hmusum
*/
public abstract class AbstractSpoolingLogger extends AbstractThreadedLogger implements Runnable {
protected static final java.util.logging.Logger log = java.util.logging.Logger.getLogger(Spooler.class.getName());
private final ScheduledExecutorService executorService;
protected final Spooler spooler;
public AbstractSpoolingLogger() {
this(new Spooler(Clock.systemUTC()));
}
public AbstractSpoolingLogger(Spooler spooler) {
this.spooler = spooler;
this.executorService = new ScheduledThreadPoolExecutor(1, new DaemonThreadFactory("AbstractSpoolingLogger-send-"));
executorService.scheduleWithFixedDelay(this, 0, 1L, TimeUnit.SECONDS);
}
public void run() {
try {
spooler.switchFileIfNeeded();
spooler.processFiles(this::transport);
} catch (Exception e) {
log.log(Level.WARNING, "Exception when processing files: " + e.getMessage());
}
}
@Override
public boolean send(LoggerEntry entry) {
log.log(Level.FINE, "Sending entry " + entry + " to spooler");
try {
executor.execute(() -> spooler.write(entry));
} catch (RejectedExecutionException e) {
return false;
}
return true;
}
@Deprecated
/*
@deprecated use {@link #deconstruct()} instead
*/
public void shutdown() { deconstruct(); }
@Override
public void deconstruct() {
super.deconstruct();
executorService.shutdown();
try {
if ( ! executorService.awaitTermination(10, TimeUnit.SECONDS))
log.log(Level.WARNING, "Timeout elapsed waiting for termination");
} catch (InterruptedException e) {
log.log(Level.WARNING, "Failure when waiting for termination: " + e.getMessage());
}
run(); // Run a last time to make sure all data is written to file
}
}
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