Examples with TimerTask java.util.TimerTask used on opensource projects

Example 51 with TimerTask

use of java.util.TimerTask in project voltdb by VoltDB.

the class AsyncBenchmark method main.

// Application entry point
public static void main(String[] args) {
    try {
        // ---------------------------------------------------------------------------------------------------------------------------------------------------
        // Use the AppHelper utility class to retrieve command line application parameters
        // Define parameters and pull from command line
        apph.add("displayinterval", "display_interval_in_seconds", "Interval for performance feedback, in seconds.", 10).add("duration", "run_duration_in_seconds", "Benchmark duration, in seconds.", 120).add("servers", "comma_separated_server_list", "List of VoltDB servers to connect to.", "localhost").add("port", "port_number", "Client port to connect to on cluster nodes.", 21212).add("resultsize", "result_size", "Size of the result value returned by each operation", 0).add("paramsize", "param_size", "Size of the op parameter if the op supports arbitrary size params", 0).add("operation", "operation", "The procedure to invoke", "NoArgs").add("ratelimit", "rate_limit", "Rate limit to start from (number of transactions per second).", 900000).setArguments(args);
        // Retrieve parameters
        long displayInterval = apph.longValue("displayinterval");
        duration = apph.longValue("duration");
        String servers = apph.stringValue("servers");
        int port = apph.intValue("port");
        resultSize = apph.intValue("resultsize");
        paramSize = apph.intValue("paramsize");
        long rateLimit = apph.longValue("ratelimit");
        final String csv = apph.stringValue("statsfile");
        final String op = apph.stringValue("operation");
        // Validate parameters
        apph.validate("duration", (duration > 0)).validate("displayinterval", (displayInterval > 0)).validate("resultsize", (resultSize >= 0)).validate("paramsize", (paramSize >= 0)).validate("ratelimit", (rateLimit > 0));
        // Display actual parameters, for reference
        apph.printActualUsage();
        // ---------------------------------------------------------------------------------------------------------------------------------------------------
        // Get a client connection - we retry for a while in case the server hasn't started yet
        Con = ClientConnectionPool.getWithRetry(servers, port);
        // ---------------------------------------------------------------------------------------------------------------------------------------------------
        // Create a Timer task to display performance data on the operating procedures
        timer = new Timer();
        timer.scheduleAtFixedRate(new TimerTask() {

            @Override
            public void run() {
                System.out.print(Con.getStatistics(op));
            }
        }, displayInterval * 1000l, displayInterval * 1000l);
        // ---------------------------------------------------------------------------------------------------------------------------------------------------
        // Pick the transaction rate limiter helping object to use based on user request (rate limiting or latency targeting)
        limiter = new RateLimiter(rateLimit);
        // Run the benchmark loop for the requested duration
        if (op.substring(0, 6).equalsIgnoreCase("noargs")) {
            runNoArgs(op.endsWith("RW") ? false : true);
        } else if (op.substring(0, 13).equalsIgnoreCase("BinaryPayload")) {
            runBinaryPayload(op.endsWith("RW") ? false : true);
        }
        // ---------------------------------------------------------------------------------------------------------------------------------------------------
        // We're done - stop the performance statistics display task
        timer.cancel();
        // ---------------------------------------------------------------------------------------------------------------------------------------------------
        // Now print application results:
        // 1. Overall performance statistics for GET/PUT operations
        System.out.println("\n\n-------------------------------------------------------------------------------------\n" + " System Statistics\n" + "-------------------------------------------------------------------------------------\n\n");
        System.out.print(Con.getStatistics(op).toString(false));
        // 2. Per-procedure detailed performance statistics
        System.out.println("\n\n-------------------------------------------------------------------------------------\n" + " Detailed Statistics\n" + "-------------------------------------------------------------------------------------\n\n");
        System.out.print(Con.getStatistics().toString(false));
        // Dump statistics to a CSV file
        Con.saveStatistics(csv);
    // ---------------------------------------------------------------------------------------------------------------------------------------------------
    } catch (org.voltdb.client.NoConnectionsException x) {
        System.out.println("Exception: " + x);
        System.out.println("\n\n-------------------------------------------------------------------------------------\n");
        System.out.print("Lost connection - will try to reconnect ... \n");
        Con.close();
        timer.cancel();
        try {
            Con = ClientConnectionPool.getWithRetry(apph.stringValue("servers"), apph.intValue("port"));
        } catch (Exception e) {
            System.out.println("Another exception, I guess " + e);
        }
    } catch (Exception x) {
        System.out.println("Exception: " + x);
        x.printStackTrace();
        System.exit(1);
    }
}

Example 52 with TimerTask

use of java.util.TimerTask in project voltdb by VoltDB.

the class MOBenchmark method schedulePeriodicStats.

/**
     * Create a Timer task to display performance data on the Vote procedure
     * It calls printStatistics() every displayInterval seconds
     */
public void schedulePeriodicStats() {
    timer = new Timer();
    TimerTask statsPrinting = new TimerTask() {

        @Override
        public void run() {
            printStatistics();
        }
    };
    timer.scheduleAtFixedRate(statsPrinting, config.displayinterval * 1000, config.displayinterval * 1000);
}

Example 53 with TimerTask

use of java.util.TimerTask in project voltdb by VoltDB.

the class OneShotBenchmark method schedulePeriodicStats.

/**
     * Create a Timer task to display performance data on the Vote procedure
     * It calls printStatistics() every displayInterval seconds
     */
public void schedulePeriodicStats() {
    timer = new Timer();
    TimerTask statsPrinting = new TimerTask() {

        @Override
        public void run() {
            printStatistics();
        }
    };
    timer.scheduleAtFixedRate(statsPrinting, config.displayinterval * 1000, config.displayinterval * 1000);
}

Example 54 with TimerTask

use of java.util.TimerTask in project voltdb by VoltDB.

the class Benchmark method schedulePeriodicCheckpoint.

/**
     * Create a Timer task to write the value of the txnCount to
     * disk to make it available to apprunner
     */
private void schedulePeriodicCheckpoint() throws IOException {
    checkpointTimer = new Timer("Checkpoint Timer", true);
    TimerTask checkpointTask = new TimerTask() {

        @Override
        public void run() {
            String count = String.valueOf(txnCount.get()) + "\n";
            try {
                FileWriter writer = new FileWriter(".checkpoint", false);
                writer.write(count);
                writer.close();
            } catch (Exception e) {
                System.err.println("Caught exception writing checkpoint file.");
            }
        }
    };
    checkpointTimer.scheduleAtFixedRate(checkpointTask, 1 * 1000, 1 * 1000);
}

Example 55 with TimerTask

use of java.util.TimerTask in project voltdb by VoltDB.

the class NbboBenchmark method schedulePeriodicStats.

/**
     * Create a Timer task to display performance data on the Vote procedure
     * It calls printStatistics() every displayInterval seconds
     */
public void schedulePeriodicStats() {
    timer = new Timer();
    TimerTask statsPrinting = new TimerTask() {

        @Override
        public void run() {
            printStatistics();
        }
    };
    timer.scheduleAtFixedRate(statsPrinting, config.displayinterval * 1000, config.displayinterval * 1000);
}