Example usage for java.util Random nextBoolean

Introduction

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

Prototype

public boolean nextBoolean() 

Source Link

Document

Returns the next pseudorandom, uniformly distributed boolean value from this random number generator's sequence.

Usage

From source file:op.tools.SYSTools.java

public static Date anonymizeDate(Date in) {
    Date result = in;//w  ww  . j a  va2s. c  o  m
    if (OPDE.isAnonym()) {
        Random rnd = new Random(System.nanoTime());
        DateTime dt = new DateTime(in);
        int factor = rnd.nextBoolean() ? -1 : 1;
        result = dt.plusDays(rnd.nextInt(300) * factor).plusYears(rnd.nextInt(5) * factor).toDate();
    }
    return result;

}

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From source file:org.apache.hadoop.hbase.regionserver.wal.TestHLogFiltering.java

private void fillTable() throws IOException, InterruptedException {
    HTable table = TEST_UTIL.createTable(TABLE_NAME, FAMILIES, 3, Bytes.toBytes("row0"), Bytes.toBytes("row99"),
            NUM_RS);/* w w  w . ja va  2s  . com*/
    Random rand = new Random(19387129L);
    for (int iStoreFile = 0; iStoreFile < 4; ++iStoreFile) {
        for (int iRow = 0; iRow < 100; ++iRow) {
            final byte[] row = Bytes.toBytes("row" + iRow);
            Put put = new Put(row);
            Delete del = new Delete(row);
            for (int iCol = 0; iCol < 10; ++iCol) {
                final byte[] cf = rand.nextBoolean() ? CF1 : CF2;
                final long ts = Math.abs(rand.nextInt());
                final byte[] qual = Bytes.toBytes("col" + iCol);
                if (rand.nextBoolean()) {
                    final byte[] value = Bytes
                            .toBytes("value_for_row_" + iRow + "_cf_" + Bytes.toStringBinary(cf) + "_col_"
                                    + iCol + "_ts_" + ts + "_random_" + rand.nextLong());
                    put.add(cf, qual, ts, value);
                } else if (rand.nextDouble() < 0.8) {
                    del.deleteColumn(cf, qual, ts);
                } else {
                    del.deleteColumns(cf, qual, ts);
                }
            }
            table.put(put);
            table.delete(del);
            table.flushCommits();
        }
    }
    TEST_UTIL.waitUntilAllRegionsAssigned(TABLE_NAME);
}

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From source file:org.broadinstitute.gatk.tools.walkers.variantrecalibration.MultivariateGaussian.java

public void initializeRandomSigma(final Random rand) {
    final double[][] randSigma = new double[mu.length][mu.length];
    for (int iii = 0; iii < mu.length; iii++) {
        for (int jjj = iii; jjj < mu.length; jjj++) {
            randSigma[jjj][iii] = 0.55 + 1.25 * rand.nextDouble();
            if (rand.nextBoolean()) {
                randSigma[jjj][iii] *= -1.0;
            }/*  w w  w  . j  a v  a2  s.com*/
            if (iii != jjj) {
                randSigma[iii][jjj] = 0.0;
            } // Sigma is a symmetric, positive-definite matrix created by taking a lower diagonal matrix and multiplying it by its transpose
        }
    }
    Matrix tmp = new Matrix(randSigma);
    tmp = tmp.times(tmp.transpose());
    sigma.setMatrix(0, mu.length - 1, 0, mu.length - 1, tmp);
}

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From source file:org.apache.metron.stellar.dsl.functions.HashFunctionsTest.java

@Test
public void tlsh_multithread() throws Exception {
    //we want to ensure that everything is threadsafe, so we'll spin up some random data
    //generate some hashes and then do it all in parallel and make sure it all matches.
    Map<Map.Entry<byte[], Map<String, Object>>, String> hashes = new HashMap<>();
    Random r = new Random(0);
    for (int i = 0; i < 20; ++i) {
        byte[] d = new byte[256];
        r.nextBytes(d);/*  w ww.jav a 2s  .  c om*/
        Map<String, Object> config = new HashMap<String, Object>() {
            {
                put(TLSHHasher.Config.BUCKET_SIZE.key, r.nextBoolean() ? 128 : 256);
                put(TLSHHasher.Config.CHECKSUM.key, r.nextBoolean() ? 1 : 3);
            }
        };
        String hash = (String) run("HASH(data, 'tlsh', config)", ImmutableMap.of("config", config, "data", d));
        Assert.assertNotNull(hash);
        hashes.put(new AbstractMap.SimpleEntry<>(d, config), hash);
    }
    ForkJoinPool forkJoinPool = new ForkJoinPool(5);

    forkJoinPool.submit(() -> hashes.entrySet().parallelStream().forEach(kv -> {
        Map<String, Object> config = kv.getKey().getValue();
        byte[] data = kv.getKey().getKey();
        String hash = (String) run("HASH(data, 'tlsh', config)",
                ImmutableMap.of("config", config, "data", data));
        Assert.assertEquals(hash, kv.getValue());
    }));
}

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From source file:com.streamsets.pipeline.lib.jdbc.multithread.TestMultithreadedTableProvider.java

private static Map<TableRuntimeContext, Map<String, String>> createRandomPartitionsAndStoredOffsets(
        boolean enablePartitioning) {
    Random random = RandomTestUtils.getRandom();
    Map<TableRuntimeContext, Map<String, String>> partitions = new HashMap<>();

    List<Integer> sqlTypes = new ArrayList<>(TableContextUtil.PARTITIONABLE_TYPES);

    String schemaName = "schema";
    String offsetColName = "OFFSET_COL";

    int numTables = RandomTestUtils.nextInt(1, 8);
    for (int t = 0; t < numTables; t++) {
        String tableName = String.format("table%d", t);

        int type = sqlTypes.get(RandomTestUtils.nextInt(0, sqlTypes.size()));
        PartitioningMode partitioningMode = enablePartitioning && random.nextBoolean()
                ? PartitioningMode.BEST_EFFORT
                : PartitioningMode.DISABLED;
        final boolean partitioned = partitioningMode == PartitioningMode.BEST_EFFORT;
        int maxNumPartitions = partitioned ? RandomTestUtils.nextInt(1, 10) : 1;

        // an integer should be compatible with all partitionable types
        int partitionSize = RandomTestUtils.nextInt(1, 1000000);

        TableContext table = new TableContext(schemaName, tableName,
                Maps.newLinkedHashMap(Collections.singletonMap(offsetColName, type)),
                Collections.singletonMap(offsetColName, null),
                Collections.singletonMap(offsetColName, String.valueOf(partitionSize)),
                Collections.singletonMap(offsetColName, "0"),
                TableConfigBean.ENABLE_NON_INCREMENTAL_DEFAULT_VALUE, partitioningMode, maxNumPartitions, null);

        for (int p = 0; p < maxNumPartitions; p++) {
            if (partitioned && random.nextBoolean() && !(p == maxNumPartitions - 1 && partitions.isEmpty())) {
                // only create some partitions
                continue;
            }/* w  w  w .ja  va 2  s .  c  o  m*/

            int startOffset = p * partitionSize;
            int maxOffset = (p + 1) * partitionSize;

            Map<String, String> partitionStoredOffsets = null;
            if (random.nextBoolean()) {
                // only simulate stored offsets sometimes
                int storedOffset = RandomTestUtils.nextInt(startOffset + 1, maxOffset + 1);
                partitionStoredOffsets = Collections.singletonMap(offsetColName, String.valueOf(storedOffset));
            }

            TableRuntimeContext partition = new TableRuntimeContext(table, false, partitioned,
                    partitioned ? p + 1 : TableRuntimeContext.NON_PARTITIONED_SEQUENCE,
                    Collections.singletonMap(offsetColName, String.valueOf(startOffset)),
                    Collections.singletonMap(offsetColName, String.valueOf(maxOffset)), partitionStoredOffsets);

            partitions.put(partition, partitionStoredOffsets);
        }
    }

    return partitions;
}

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From source file:org.activiti.explorer.conf.DemoDataConfiguration.java

protected void generateReportData() {
    // Report data is generated in background thread

    Thread thread = new Thread(new Runnable() {

        public void run() {

            // We need to temporarily disable the job executor or it would interfere with the process execution
            processEngineConfiguration.getJobExecutor().shutdown();

            Random random = new Random();

            Date now = new Date(new Date().getTime() - (24 * 60 * 60 * 1000));
            processEngineConfiguration.getClock().setCurrentTime(now);

            for (int i = 0; i < 50; i++) {

                if (random.nextBoolean()) {
                    runtimeService.startProcessInstanceByKey("fixSystemFailure");
                }//from w  ww  . ja  va  2s.c  o  m

                if (random.nextBoolean()) {
                    identityService.setAuthenticatedUserId("kermit");
                    Map<String, Object> variables = new HashMap<String, Object>();
                    variables.put("customerName", "testCustomer");
                    variables.put("details", "Looks very interesting!");
                    variables.put("notEnoughInformation", false);
                    runtimeService.startProcessInstanceByKey("reviewSaledLead", variables);
                }

                if (random.nextBoolean()) {
                    runtimeService.startProcessInstanceByKey("escalationExample");
                }

                if (random.nextInt(100) < 20) {
                    now = new Date(now.getTime() - ((24 * 60 * 60 * 1000) - (60 * 60 * 1000)));
                    processEngineConfiguration.getClock().setCurrentTime(now);
                }
            }

            List<Job> jobs = managementService.createJobQuery().list();
            for (int i = 0; i < jobs.size() / 2; i++) {
                processEngineConfiguration.getClock().setCurrentTime(jobs.get(i).getDuedate());
                managementService.executeJob(jobs.get(i).getId());
            }

            List<Task> tasks = taskService.createTaskQuery().list();
            while (!tasks.isEmpty()) {
                for (Task task : tasks) {

                    if (task.getAssignee() == null) {
                        String assignee = random.nextBoolean() ? "kermit" : "fozzie";
                        taskService.claim(task.getId(), assignee);
                    }

                    processEngineConfiguration.getClock().setCurrentTime(
                            new Date(task.getCreateTime().getTime() + random.nextInt(60 * 60 * 1000)));

                    taskService.complete(task.getId());
                }

                tasks = taskService.createTaskQuery().list();
            }

            processEngineConfiguration.getClock().reset();

            processEngineConfiguration.getJobExecutor().start();
            LOGGER.info("Demo report data generated");
        }

    });
    thread.start();
}

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From source file:org.activiti.explorer.conf.DemoDataInitializer.java

protected void generateReportData() {
    // Report data is generated in background thread

    Thread thread = new Thread(new Runnable() {

        @Override/*from   ww  w . j  a v a  2s. co  m*/
        public void run() {

            // We need to temporarily disable the job executor or it would interfere with the process execution
            processEngineConfiguration.getJobExecutor().shutdown();

            Random random = new Random();

            Date now = new Date(new Date().getTime() - (24 * 60 * 60 * 1000));
            processEngineConfiguration.getClock().setCurrentTime(now);

            for (int i = 0; i < 50; i++) {

                if (random.nextBoolean()) {
                    runtimeService.startProcessInstanceByKey("fixSystemFailure");
                }

                if (random.nextBoolean()) {
                    identityService.setAuthenticatedUserId("kermit");
                    Map<String, Object> variables = new HashMap<String, Object>();
                    variables.put("customerName", "testCustomer");
                    variables.put("details", "Looks very interesting!");
                    variables.put("notEnoughInformation", false);
                    runtimeService.startProcessInstanceByKey("reviewSaledLead", variables);
                }

                if (random.nextBoolean()) {
                    runtimeService.startProcessInstanceByKey("escalationExample");
                }

                if (random.nextInt(100) < 20) {
                    now = new Date(now.getTime() - ((24 * 60 * 60 * 1000) - (60 * 60 * 1000)));
                    processEngineConfiguration.getClock().setCurrentTime(now);
                }
            }

            List<Job> jobs = managementService.createJobQuery().list();
            for (int i = 0; i < jobs.size() / 2; i++) {
                processEngineConfiguration.getClock().setCurrentTime(jobs.get(i).getDuedate());
                managementService.executeJob(jobs.get(i).getId());
            }

            List<Task> tasks = taskService.createTaskQuery().list();
            while (!tasks.isEmpty()) {
                for (Task task : tasks) {

                    if (task.getAssignee() == null) {
                        String assignee = random.nextBoolean() ? "kermit" : "fozzie";
                        taskService.claim(task.getId(), assignee);
                    }

                    processEngineConfiguration.getClock().setCurrentTime(
                            new Date(task.getCreateTime().getTime() + random.nextInt(60 * 60 * 1000)));

                    taskService.complete(task.getId());
                }

                tasks = taskService.createTaskQuery().list();
            }

            processEngineConfiguration.getClock().reset();

            processEngineConfiguration.getJobExecutor().start();
            LOG.info("Demo report data generated");
        }

    });
    thread.start();
}

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From source file:org.apache.hadoop.hdfs.qjournal.client.TestImageUploadStream.java

/**
 * Write random data by using write(byte) and write(byt[]).
 *//*from   www  . ja  va  2  s  .  c o m*/
private byte[] writeData(OutputStream os, int size) throws IOException {
    Random r = new Random();
    int approxMaxLen = size;
    int bytesWritten = 0;

    ByteArrayOutputStream bos = new ByteArrayOutputStream();

    while (bytesWritten < approxMaxLen) {
        if (r.nextBoolean()) {
            int b = r.nextInt();
            os.write(b);
            bos.write(b);
            bytesWritten++;
        } else {
            byte[] rand = new byte[r.nextInt(10) + 1];
            r.nextBytes(rand);
            os.write(rand);
            bos.write(rand);
            bytesWritten += rand.length;
        }
    }
    return bos.toByteArray();
}

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From source file:org.activiti.explorer.conf.DefaultDataConfiguration.java

protected void generateReportData() {
    // Report data is generated in background thread

    Thread thread = new Thread(new Runnable() {

        public void run() {

            // We need to temporarily disable the job executor or it would interfere with the process execution
            if (processEngineConfiguration.isAsyncExecutorEnabled()
                    && processEngineConfiguration.getAsyncExecutor() != null) {
                processEngineConfiguration.getAsyncExecutor().shutdown();
            } else if (processEngineConfiguration.isAsyncExecutorEnabled() == false
                    && processEngineConfiguration.getJobExecutor() != null) {
                processEngineConfiguration.getJobExecutor().shutdown();
            }//w w w  . j a  v a 2s. c  o  m

            Random random = new Random();

            Date now = new Date(new Date().getTime() - (24 * 60 * 60 * 1000));
            processEngineConfiguration.getClock().setCurrentTime(now);

            for (int i = 0; i < 50; i++) {

                if (random.nextBoolean()) {
                    runtimeService.startProcessInstanceByKey("fixSystemFailure");
                }

                if (random.nextBoolean()) {
                    identityService.setAuthenticatedUserId("kermit");
                    Map<String, Object> variables = new HashMap<String, Object>();
                    variables.put("customerName", "testCustomer");
                    variables.put("details", "Looks very interesting!");
                    variables.put("notEnoughInformation", false);
                    runtimeService.startProcessInstanceByKey("reviewSaledLead", variables);
                }

                if (random.nextBoolean()) {
                    runtimeService.startProcessInstanceByKey("escalationExample");
                }

                if (random.nextInt(100) < 20) {
                    now = new Date(now.getTime() - ((24 * 60 * 60 * 1000) - (60 * 60 * 1000)));
                    processEngineConfiguration.getClock().setCurrentTime(now);
                }
            }

            List<Job> jobs = managementService.createJobQuery().list();
            for (int i = 0; i < jobs.size() / 2; i++) {
                processEngineConfiguration.getClock().setCurrentTime(jobs.get(i).getDuedate());
                managementService.executeJob(jobs.get(i).getId());
            }

            List<Task> tasks = taskService.createTaskQuery().list();
            while (!tasks.isEmpty()) {
                for (Task task : tasks) {

                    if (task.getAssignee() == null) {
                        String assignee = random.nextBoolean() ? "kermit" : "fozzie";
                        taskService.claim(task.getId(), assignee);
                    }

                    processEngineConfiguration.getClock().setCurrentTime(
                            new Date(task.getCreateTime().getTime() + random.nextInt(60 * 60 * 1000)));

                    taskService.complete(task.getId());
                }

                tasks = taskService.createTaskQuery().list();
            }

            processEngineConfiguration.getClock().reset();

            if (processEngineConfiguration.isAsyncExecutorEnabled()
                    && processEngineConfiguration.getAsyncExecutor() != null) {
                processEngineConfiguration.getAsyncExecutor().start();
            } else if (processEngineConfiguration.isAsyncExecutorEnabled() == false
                    && processEngineConfiguration.getJobExecutor() != null) {
                processEngineConfiguration.getJobExecutor().start();
            }
            LOGGER.info("Demo report data generated");
        }

    });
    thread.start();
}

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From source file:de.upb.timok.run.GenericSmacPipeline.java

private void changeTimeValue(Random mutation, TDoubleList timeValues, double changePercent, int i) {
    double newValue = timeValues.get(i);
    if (mutation.nextBoolean()) {
        newValue = newValue + newValue * changePercent;
    } else {/*from  w  w w .  ja v a 2  s .c o m*/
        newValue = newValue - newValue * changePercent;
    }
    timeValues.set(i, newValue);
}

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