Examples with Daemon org.apache.accumulo.core.util.Daemon used on opensource projects

Example 6 with Daemon

use of org.apache.accumulo.core.util.Daemon in project accumulo by apache.

the class SecurityUtil method startTicketRenewalThread.

/**
 * Start a thread that periodically attempts to renew the current Kerberos user's ticket.
 *
 * @param ugi
 *          The current Kerberos user.
 * @param renewalPeriod
 *          The amount of time between attempting renewals.
 */
static void startTicketRenewalThread(final UserGroupInformation ugi, final long renewalPeriod) {
    Thread t = new Daemon(new LoggingRunnable(renewalLog, new Runnable() {

        @Override
        public void run() {
            while (true) {
                try {
                    renewalLog.debug("Invoking renewal attempt for Kerberos ticket");
                    // While we run this "frequently", the Hadoop implementation will only perform the login at 80% of ticket lifetime.
                    ugi.checkTGTAndReloginFromKeytab();
                } catch (IOException e) {
                    // Should failures to renew the ticket be retried more quickly?
                    renewalLog.error("Failed to renew Kerberos ticket", e);
                }
                // Wait for a bit before checking again.
                try {
                    Thread.sleep(renewalPeriod);
                } catch (InterruptedException e) {
                    renewalLog.error("Renewal thread interrupted", e);
                    Thread.currentThread().interrupt();
                    return;
                }
            }
        }
    }));
    t.setName("Kerberos Ticket Renewal");
    t.start();
}

Example 7 with Daemon

use of org.apache.accumulo.core.util.Daemon in project accumulo by apache.

the class Halt method halt.

public static void halt(final int status, Runnable runnable) {
    try {
        // give ourselves a little time to try and do something
        new Daemon() {

            @Override
            public void run() {
                sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
                Runtime.getRuntime().halt(status);
            }
        }.start();
        if (runnable != null)
            runnable.run();
        Runtime.getRuntime().halt(status);
    } finally {
        // In case something else decides to throw a Runtime exception
        Runtime.getRuntime().halt(-1);
    }
}

Example 8 with Daemon

use of org.apache.accumulo.core.util.Daemon in project accumulo by apache.

the class Monitor method run.

public void run(String hostname) {
    Monitor.START_TIME = System.currentTimeMillis();
    int[] ports = config.getSystemConfiguration().getPort(Property.MONITOR_PORT);
    for (int port : ports) {
        try {
            log.debug("Creating monitor on port {}", port);
            server = new EmbeddedWebServer(hostname, port);
            server.addServlet(getDefaultServlet(), "/resources/*");
            server.addServlet(getRestServlet(), "/rest/*");
            server.addServlet(getViewServlet(), "/*");
            server.start();
            break;
        } catch (Throwable ex) {
            log.error("Unable to start embedded web server", ex);
        }
    }
    if (!server.isRunning()) {
        throw new RuntimeException("Unable to start embedded web server on ports: " + Arrays.toString(ports));
    }
    try {
        getMonitorLock();
    } catch (Exception e) {
        log.error("Failed to get Monitor ZooKeeper lock");
        throw new RuntimeException(e);
    }
    String advertiseHost = hostname;
    if (advertiseHost.equals("0.0.0.0")) {
        try {
            advertiseHost = InetAddress.getLocalHost().getHostName();
        } catch (UnknownHostException e) {
            log.error("Unable to get hostname", e);
        }
    }
    log.debug("Using {} to advertise monitor location in ZooKeeper", advertiseHost);
    try {
        String monitorAddress = HostAndPort.fromParts(advertiseHost, server.getPort()).toString();
        ZooReaderWriter.getInstance().putPersistentData(ZooUtil.getRoot(instance) + Constants.ZMONITOR_HTTP_ADDR, monitorAddress.getBytes(UTF_8), NodeExistsPolicy.OVERWRITE);
        log.info("Set monitor address in zookeeper to {}", monitorAddress);
    } catch (Exception ex) {
        log.error("Unable to set monitor HTTP address in zookeeper", ex);
    }
    if (null != advertiseHost) {
        LogService.startLogListener(Monitor.getContext().getConfiguration(), instance.getInstanceID(), advertiseHost);
    } else {
        log.warn("Not starting log4j listener as we could not determine address to use");
    }
    new Daemon(new LoggingRunnable(log, new ZooKeeperStatus()), "ZooKeeperStatus").start();
    // need to regularly fetch data so plot data is updated
    new Daemon(new LoggingRunnable(log, new Runnable() {

        @Override
        public void run() {
            while (true) {
                try {
                    Monitor.fetchData();
                } catch (Exception e) {
                    log.warn("{}", e.getMessage(), e);
                }
                sleepUninterruptibly(333, TimeUnit.MILLISECONDS);
            }
        }
    }), "Data fetcher").start();
    new Daemon(new LoggingRunnable(log, new Runnable() {

        @Override
        public void run() {
            while (true) {
                try {
                    Monitor.fetchScans();
                } catch (Exception e) {
                    log.warn("{}", e.getMessage(), e);
                }
                sleepUninterruptibly(5, TimeUnit.SECONDS);
            }
        }
    }), "Scan scanner").start();
    monitorInitialized.set(true);
}