Example usage for java.util Random Random

Introduction

In this page you can find the example usage for java.util Random Random.

Prototype

public Random() 

Source Link

Document

Creates a new random number generator.

Usage

From source file:Main.java

public static void shuffle(final Object[] array) {
    final Random r = new Random();
    final int limit = array.length;
    for (int i = 0; i < limit; ++i) {
        swap(array, i, r.nextInt(limit));
    }//from   w w w.ja  va2s.  co m
}

---

From source file:com.cloud.test.stress.TestClientWithAPI.java

public static void main(String[] args) {
    String host = "http://localhost";
    String port = "8092";
    String devPort = "8080";
    String apiUrl = "/client/api";

    try {//ww  w .  jav a2 s. c o m
        // Parameters
        List<String> argsList = Arrays.asList(args);
        Iterator<String> iter = argsList.iterator();
        while (iter.hasNext()) {
            String arg = iter.next();
            // host
            if (arg.equals("-h")) {
                host = "http://" + iter.next();
            }

            if (arg.equals("-p")) {
                port = iter.next();
            }
            if (arg.equals("-dp")) {
                devPort = iter.next();
            }

            if (arg.equals("-t")) {
                numThreads = Integer.parseInt(iter.next());
            }

            if (arg.equals("-s")) {
                sleepTime = Long.parseLong(iter.next());
            }
            if (arg.equals("-a")) {
                accountName = iter.next();
            }

            if (arg.equals("-c")) {
                cleanUp = Boolean.parseBoolean(iter.next());
                if (!cleanUp)
                    sleepTime = 0L; // no need to wait if we don't ever
                // cleanup
            }

            if (arg.equals("-r")) {
                repeat = Boolean.parseBoolean(iter.next());
            }

            if (arg.equals("-u")) {
                numOfUsers = Integer.parseInt(iter.next());
            }

            if (arg.equals("-i")) {
                internet = Boolean.parseBoolean(iter.next());
            }

            if (arg.equals("-w")) {
                wait = Integer.parseInt(iter.next());
            }

            if (arg.equals("-z")) {
                zoneId = iter.next();
            }

            if (arg.equals("-snapshot")) {
                snapshot_test = "yes";
            }

            if (arg.equals("-so")) {
                serviceOfferingId = iter.next();
            }

            if (arg.equals("-do")) {
                diskOfferingId = iter.next();
            }

            if (arg.equals("-no")) {
                networkOfferingId = iter.next();
            }

            if (arg.equals("-pass")) {
                vmPassword = iter.next();
            }

            if (arg.equals("-url")) {
                downloadUrl = iter.next();
            }

        }

        final String server = host + ":" + port + "/";
        final String developerServer = host + ":" + devPort + apiUrl;
        s_logger.info("Starting test against server: " + server + " with " + numThreads + " thread(s)");
        if (cleanUp)
            s_logger.info("Clean up is enabled, each test will wait " + sleepTime + " ms before cleaning up");

        if (numOfUsers > 0) {
            s_logger.info("Pre-generating users for test of size : " + numOfUsers);
            users = new String[numOfUsers];
            Random ran = new Random();
            for (int i = 0; i < numOfUsers; i++) {
                users[i] = Math.abs(ran.nextInt()) + "-user";
            }
        }

        for (int i = 0; i < numThreads; i++) {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    do {
                        String username = null;
                        try {
                            long now = System.currentTimeMillis();
                            Random ran = new Random();
                            if (users != null) {
                                username = users[Math.abs(ran.nextInt()) % numOfUsers];
                            } else {
                                username = Math.abs(ran.nextInt()) + "-user";
                            }
                            NDC.push(username);

                            s_logger.info("Starting test for the user " + username);
                            int response = executeDeployment(server, developerServer, username, snapshot_test);
                            boolean success = false;
                            String reason = null;

                            if (response == 200) {
                                success = true;
                                if (internet) {
                                    s_logger.info("Deploy successful...waiting 5 minute before SSH tests");
                                    Thread.sleep(300000L); // Wait 60
                                    // seconds so
                                    // the windows VM
                                    // can boot up and do a sys prep.

                                    if (accountName == null) {
                                        s_logger.info("Begin Linux SSH test for account " + _account.get());
                                        reason = sshTest(_linuxIP.get(), _linuxPassword.get(), snapshot_test);
                                    }

                                    if (reason == null) {
                                        s_logger.info(
                                                "Linux SSH test successful for account " + _account.get());
                                        s_logger.info("Begin WindowsSSH test for account " + _account.get());

                                        reason = sshTest(_linuxIP.get(), _linuxPassword.get(), snapshot_test);
                                        // reason = sshWinTest(_windowsIP.get());
                                    }

                                    // release the linux IP now...
                                    _linuxIP.set(null);
                                    // release the Windows IP now
                                    _windowsIP.set(null);
                                }

                                // sleep for 3 min before getting the latest network stat
                                // s_logger.info("Sleeping for 5 min before getting the lates network stat for the account");
                                // Thread.sleep(300000);
                                // verify that network stat is correct for the user; if it's not - stop all the resources
                                // for the user
                                // if ((reason == null) && (getNetworkStat(server) == false) ) {
                                // s_logger.error("Stopping all the resources for the account " + _account.get() +
                                // " as network stat is incorrect");
                                // int stopResponseCode = executeStop(
                                // server, developerServer,
                                // username, false);
                                // s_logger
                                // .info("stop command finished with response code: "
                                // + stopResponseCode);
                                // success = false; // since the SSH test
                                //
                                // } else
                                if (reason == null) {
                                    if (internet) {
                                        s_logger.info(
                                                "Windows SSH test successful for account " + _account.get());
                                    } else {
                                        s_logger.info("deploy test successful....now cleaning up");
                                        if (cleanUp) {
                                            s_logger.info(
                                                    "Waiting " + sleepTime + " ms before cleaning up vms");
                                            Thread.sleep(sleepTime);
                                        } else {
                                            success = true;
                                        }
                                    }

                                    if (usageIterator >= numThreads) {
                                        int eventsAndBillingResponseCode = executeEventsAndBilling(server,
                                                developerServer);
                                        s_logger.info(
                                                "events and usage records command finished with response code: "
                                                        + eventsAndBillingResponseCode);
                                        usageIterator = 1;

                                    } else {
                                        s_logger.info(
                                                "Skipping events and usage records for this user: usageIterator "
                                                        + usageIterator + " and number of Threads "
                                                        + numThreads);
                                        usageIterator++;
                                    }

                                    if ((users == null) && (accountName == null)) {
                                        s_logger.info("Sending cleanup command");
                                        int cleanupResponseCode = executeCleanup(server, developerServer,
                                                username);
                                        s_logger.info("cleanup command finished with response code: "
                                                + cleanupResponseCode);
                                        success = (cleanupResponseCode == 200);
                                    } else {
                                        s_logger.info("Sending stop DomR / destroy VM command");
                                        int stopResponseCode = executeStop(server, developerServer, username,
                                                true);
                                        s_logger.info("stop(destroy) command finished with response code: "
                                                + stopResponseCode);
                                        success = (stopResponseCode == 200);
                                    }

                                } else {
                                    // Just stop but don't destroy the
                                    // VMs/Routers
                                    s_logger.info("SSH test failed for account " + _account.get()
                                            + "with reason '" + reason + "', stopping VMs");
                                    int stopResponseCode = executeStop(server, developerServer, username,
                                            false);
                                    s_logger.info(
                                            "stop command finished with response code: " + stopResponseCode);
                                    success = false; // since the SSH test
                                    // failed, mark the
                                    // whole test as
                                    // failure
                                }
                            } else {
                                // Just stop but don't destroy the
                                // VMs/Routers
                                s_logger.info("Deploy test failed with reason '" + reason + "', stopping VMs");
                                int stopResponseCode = executeStop(server, developerServer, username, true);
                                s_logger.info("stop command finished with response code: " + stopResponseCode);
                                success = false; // since the deploy test
                                // failed, mark the
                                // whole test as failure
                            }

                            if (success) {
                                s_logger.info("***** Completed test for user : " + username + " in "
                                        + ((System.currentTimeMillis() - now) / 1000L) + " seconds");

                            } else {
                                s_logger.info("##### FAILED test for user : " + username + " in "
                                        + ((System.currentTimeMillis() - now) / 1000L)
                                        + " seconds with reason : " + reason);
                            }
                            s_logger.info("Sleeping for " + wait + " seconds before starting next iteration");
                            Thread.sleep(wait);
                        } catch (Exception e) {
                            s_logger.warn("Error in thread", e);
                            try {
                                int stopResponseCode = executeStop(server, developerServer, username, true);
                                s_logger.info("stop response code: " + stopResponseCode);
                            } catch (Exception e1) {
                            }
                        } finally {
                            NDC.clear();
                        }
                    } while (repeat);
                }
            }).start();
        }
    } catch (Exception e) {
        s_logger.error(e);
    }
}

---

From source file:Main.java

public static int getRandomSocketPort() {
    return 1024 + new Random().nextInt(64512);
}

---

From source file:Main.java

public static long getNewLong() {
    if (random == null) {
        random = new Random();
    }/* w  w w  .j a v a2 s. c  o m*/
    return LOWER_RANGE + (long) (random.nextDouble() * (UPPER_RANGE - LOWER_RANGE));
}

---

From source file:Main.java

/**
 * This function will return a map that contains entity names as keys, and random integer strings as values. The values are guaranteed not to have appeared
 * in the original xml.//  w  ww . j  av a 2  s .c o  m
 * 
 * @param xml
 *            The xml to generate the replacements for
 * @return a map of entity names to unique random strings
 */
private static Map<String, String> calculateEntityReplacements(final String xml) {
    final Map<String, String> retValue = new HashMap<String, String>();

    final Random randomGenerator = new Random();

    /* compile the regular expression */
    final Pattern injectionSequencePattern = Pattern.compile(XML_ENTITY_RE);
    /* find any matches */
    final Matcher injectionSequencematcher = injectionSequencePattern.matcher(xml);

    /* loop over the regular expression matches */
    while (injectionSequencematcher.find()) {
        final String entityName = injectionSequencematcher.group(XML_ENTITY_NAMED_GROUP);

        if (!retValue.containsKey(entityName)) {
            String randomReplacement;
            do {
                randomReplacement = "[" + randomGenerator.nextInt() + "]";
            } while (xml.indexOf(randomReplacement) != -1);

            retValue.put(entityName, randomReplacement);
        }
    }

    return retValue;
}

---

From source file:lifetime.backend.util.TestHelper.java

/**
 * Returns a random integer./* w  w w. j  ava 2 s .c om*/
 *
 * @return A random integer value
 */
public static Integer getRandomId() {
    return new Random().nextInt();
}

---

From source file:com.saax.gestorweb.util.DAOAleatorio.java

public static CentroCusto getCentroCustoAleatorio(EntityManager em) {
    List<CentroCusto> centroCustos = em.createNamedQuery("CentroCusto.findAll").getResultList();
    return centroCustos.get(new Random().nextInt(centroCustos.size() - 1));
}

---

From source file:Main.java

/**
 * Get a random boolean/*from w w w  .j  ava2  s  . co  m*/
 */
public static boolean getNextRandomBoolean() {

    if (mRandom == null) {
        mRandom = new Random();
    }

    return mRandom.nextBoolean();
}

---

From source file:net.dovemq.transport.link.LinkTestUtils.java

public static void sendMessagesOnLink(CAMQPLinkSender linkSender, int numMessagesToSend) {
    Random randomGenerator = new Random();
    for (int i = 0; i < numMessagesToSend; i++) {
        int randomInt = randomGenerator.nextInt(5);
        CAMQPMessage message = createMessage(randomGenerator);
        linkSender.sendMessage(new CAMQPMessage(message.getDeliveryTag(), message.getPayload()));
        try {//from  w  ww  . j a  v a2s . c o  m
            Thread.sleep(randomInt);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }
}

---

From source file:Main.java

public static int getRandomNumber(int min, int max) {
    return new Random().nextInt((max - min) + 1) + min;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• »