Java safepoint event listener

LogSafepoints.java

import one.log.event.ILoggingEvent;
import one.log.event.OperationLogEvent;
import one.log.stat.StatCollector;
import one.log.stat.Statistics;
import one.nio.mgt.DiagnosticCommand;
import one.nio.os.BatchThread;

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class LogSafepoints {

    public static void main(String[] args) throws Exception {
        String pipe = "/tmp/safepoint_pipe.log";
        new ProcessBuilder("mkfifo", pipe).start().waitFor();

        Thread safepointListener = new BatchThread("Safepoint Listener") {
            @Override
            public void run() {
                Pattern pattern = Pattern.compile("\\[(\\d+)ms] Safepoint \"([0-z ]+)\", Time since last: \\d+ ns, Reaching safepoint: (\\d+) ns, At safepoint: \\d+ ns, Total: (\\d+) ns");
                try (BufferedReader br = new BufferedReader(new FileReader(pipe))) {
                    for (String s; (s = br.readLine()) != null; ) {
                        Matcher m = pattern.matcher(s);
                        if (m.matches()) {
                            logSafepoint("safepoint.stat", Long.parseLong(m.group(1)), m.group(2), Long.parseLong(m.group(3)), Long.parseLong(m.group(4)));
                        }
                    }
                } catch (Exception e) {
                    // return
                }
            }

            private void logSafepoint(String statId, long eventTime, String vmop, long syncTime, long totalTime) {
                StatCollector<ILoggingEvent> collector = Statistics.find(statId);
                if (collector != null) {
                    Object[] args = {vmop};
                    collector.collect(new OperationLogEvent(statId, true, syncTime, 1, eventTime, "safepoint.sync", args));
                    collector.collect(new OperationLogEvent(statId, true, totalTime, 1, eventTime, "safepoint.total", args));
                }
            }
        };
        safepointListener.setDaemon(true);
        safepointListener.start();

        DiagnosticCommand.execute("vmLog",
                "output=file=" + pipe,
                "output_options=filecount=0,filesize=0",
                "what=safepoint=info",
                "decorators=timemillis");

        // Test
        while (true) {
            System.gc();
            Thread.sleep(1000);
        }
    }
}