Flume每30秒加载配置文件

lxy777

Flume默认30重新加载配置文件的，如果配置了不加载的话就使用properties.load进来的，定期执行文件检查
ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor(
new ThreadFactoryBuilder().setNameFormat("conf-file-poller-%d")
.build());
FileWatcherRunnable fileWatcherRunnable =
new FileWatcherRunnable(file, counterGroup);
executorService.scheduleWithFixedDelay(fileWatcherRunnable, 0, interval,
TimeUnit.SECONDS);
定时检查任务
public class FileWatcherRunnable implements Runnable {
private final File file;
private final CounterGroup counterGroup;
private long lastChange;
public FileWatcherRunnable(File file, CounterGroup counterGroup) {
super();
this.file = file;
this.counterGroup = counterGroup;
this.lastChange = 0L;
}
@Override
public void run() {
LOGGER.debug("Checking file:{} for changes", file);
counterGroup.incrementAndGet("file.checks");
long lastModified = file.lastModified();
if (lastModified > lastChange) {
LOGGER.info("Reloading configuration file:{}", file);
counterGroup.incrementAndGet("file.loads");
lastChange = lastModified;
try {
eventBus.post(getConfiguration());
} catch (Exception e) {
LOGGER.error("Failed to load configuration data. Exception follows.",
e);
} catch (NoClassDefFoundError e) {
LOGGER.error("Failed to start agent because dependencies were not " +
"found in classpath. Error follows.", e);
} catch (Throwable t) {
// caught because the caller does not handle or log Throwables
LOGGER.error("Unhandled error", t);
}
}
}
}