Example usage for java.util Random nextLong

Introduction

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

Prototype

public long nextLong() 

Source Link

Document

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

Usage

From source file:com.luorrak.ouroboros.catalog.CatalogActivity.java

private void initPostPassword() {
    if (SettingsHelper.getPostPassword(getApplicationContext()).equals("")) {
        Random random = new Random();
        SettingsHelper.setPostPassword(getApplicationContext(), Long.toHexString(random.nextLong()));
    }/* w  ww .  j  a v  a  2  s.  c om*/
}

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From source file:org.apache.hadoop.security.Krb5AndCertsSslSocketConnector.java

private void setPasswords() {
    if (!useCerts) {
        Random r = new Random();
        System.setProperty("jetty.ssl.password", String.valueOf(r.nextLong()));
        System.setProperty("jetty.ssl.keypassword", String.valueOf(r.nextLong()));
    }/*from w  w  w  .ja v a 2 s.  co  m*/
}

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From source file:org.apache.hadoop.hbase.master.procedure.TestProcedureAdmin.java

@Test(timeout = 60000)
public void testAbortNonExistProcedure() throws Exception {
    final ProcedureExecutor<MasterProcedureEnv> procExec = getMasterProcedureExecutor();
    Random randomGenerator = new Random();
    long procId;//from   w w w. j  a  v a 2 s  . c om
    // Generate a non-existing procedure
    do {
        procId = randomGenerator.nextLong();
    } while (procExec.getResult(procId) != null);

    boolean abortResult = procExec.abort(procId, true);
    assertFalse(abortResult);
}

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From source file:org.apache.hadoop.mapred.TestCombineTextInputFormat.java

@Test(timeout = 10000)
public void testFormat() throws Exception {
    JobConf job = new JobConf(defaultConf);

    Random random = new Random();
    long seed = random.nextLong();
    LOG.info("seed = " + seed);
    random.setSeed(seed);//w ww.  j a  v  a2s  . c  om

    localFs.delete(workDir, true);
    FileInputFormat.setInputPaths(job, workDir);

    final int length = 10000;
    final int numFiles = 10;

    createFiles(length, numFiles, random);

    // create a combined split for the files
    CombineTextInputFormat format = new CombineTextInputFormat();
    LongWritable key = new LongWritable();
    Text value = new Text();
    for (int i = 0; i < 3; i++) {
        int numSplits = random.nextInt(length / 20) + 1;
        LOG.info("splitting: requesting = " + numSplits);
        InputSplit[] splits = format.getSplits(job, numSplits);
        LOG.info("splitting: got =        " + splits.length);

        // we should have a single split as the length is comfortably smaller than
        // the block size
        assertEquals("We got more than one splits!", 1, splits.length);
        InputSplit split = splits[0];
        assertEquals("It should be CombineFileSplit", CombineFileSplit.class, split.getClass());

        // check the split
        BitSet bits = new BitSet(length);
        LOG.debug("split= " + split);
        RecordReader<LongWritable, Text> reader = format.getRecordReader(split, job, voidReporter);
        try {
            int count = 0;
            while (reader.next(key, value)) {
                int v = Integer.parseInt(value.toString());
                LOG.debug("read " + v);
                if (bits.get(v)) {
                    LOG.warn("conflict with " + v + " at position " + reader.getPos());
                }
                assertFalse("Key in multiple partitions.", bits.get(v));
                bits.set(v);
                count++;
            }
            LOG.info("splits=" + split + " count=" + count);
        } finally {
            reader.close();
        }
        assertEquals("Some keys in no partition.", length, bits.cardinality());
    }
}

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From source file:com.moz.fiji.mapreduce.IntegrationTestFijiBulkLoad.java

/**
 * Generates a random HDFS path.//ww w .  j a  va  2 s .  c om
 *
 * @param prefix Prefix for the random file name.
 * @return a random HDFS path.
 * @throws Exception on error.
 */
private Path makeRandomPath(String prefix) throws Exception {
    Preconditions.checkNotNull(mFS);
    final Path base = new Path(FileSystem.getDefaultUri(mConf));
    final Random random = new Random(System.nanoTime());
    return new Path(base, String.format("/%s-%s", prefix, random.nextLong()));
}

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From source file:org.drools.util.BinaryHeapPriorityQueueTest.java

public void xxxtestBasic() {
    final Random random = new Random();
    final List items = new LinkedList();

    final BinaryHeap queue = new BinaryHeap();

    for (int i = 0; i < 100000; ++i) {
        items.add(new LongQueueable(random.nextLong()));
    }/*from  ww w . jav a  2s  . co m*/

    final long startEnqueue = System.currentTimeMillis();

    for (final Iterator i = items.iterator(); i.hasNext();) {
        queue.add(i.next());
    }

    final long elapsedEnqueue = System.currentTimeMillis() - startEnqueue;

    final long startDequeue = System.currentTimeMillis();

    for (final Iterator i = items.iterator(); i.hasNext();) {
        queue.remove(i.next());
    }

    //        while (!queue.isEmpty()) {
    //            queue.pop();
    //        }

    final long elapsedDequeue = System.currentTimeMillis() - startDequeue;

    System.out.println("elapsedEnqueue = " + elapsedEnqueue);
    System.out.println("elapsedDequeue = " + elapsedDequeue);
}

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From source file:org.sakaiproject.kernel.test.ObservationKernelUnitT.java

/**
 * @param request/*from   www .j av a 2s .  co m*/
 * @param response
 * @param session
 */
private void setupRequest(HttpServletRequest request, HttpServletResponse response, HttpSession session,
        String userName) {
    Random r = new Random();
    long sessionID = r.nextLong();
    User u = new InternalUser(userName);
    expect(request.getRemoteUser()).andReturn(userName).anyTimes();
    expect(request.getSession()).andReturn(session).anyTimes();
    expect(request.getSession(true)).andReturn(session).anyTimes();
    expect(request.getSession(false)).andReturn(session).anyTimes();
    expect(session.getId()).andReturn(userName + "SESSIONID-123" + sessionID).anyTimes();
    expect(request.getRequestedSessionId()).andReturn(userName + "SESSIONID-123" + sessionID).anyTimes();
    Cookie cookie = new Cookie("SAKAIID", "SESSIONID-123" + sessionID);
    expect(request.getCookies()).andReturn(new Cookie[] { cookie }).anyTimes();
    expect(session.getAttribute(SessionImpl.USER)).andReturn(u).anyTimes();
    response.addCookie((Cookie) anyObject());
    expectLastCall().anyTimes();
    expect(request.getAttribute("_uuid")).andReturn(null).anyTimes();
    expect(request.getAttribute("_no_session")).andReturn(null).anyTimes();
}

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From source file:org.apache.qpid.server.management.plugin.servlet.rest.SaslServlet.java

private void evaluateSaslResponse(final HttpServletRequest request, final HttpServletResponse response,
        final HttpSession session, final String saslResponse, final SaslServer saslServer,
        SubjectCreator subjectCreator) throws IOException {
    final String id;
    byte[] challenge;
    try {//from   w ww . ja v a 2 s. c  o m
        challenge = saslServer.evaluateResponse(
                saslResponse == null ? new byte[0] : Base64.decodeBase64(saslResponse.getBytes()));
    } catch (SaslException e) {
        session.removeAttribute(ATTR_ID);
        session.removeAttribute(ATTR_SASL_SERVER);
        session.removeAttribute(ATTR_EXPIRY);
        response.setStatus(HttpServletResponse.SC_FORBIDDEN);

        return;
    }

    if (saslServer.isComplete()) {
        Subject subject = subjectCreator.createSubjectWithGroups(saslServer.getAuthorizationID());

        try {
            authoriseManagement(request, subject);
        } catch (AccessControlException ace) {
            sendError(response, HttpServletResponse.SC_FORBIDDEN);
            return;
        }

        setAuthorisedSubjectInSession(subject, request, session);
        session.removeAttribute(ATTR_ID);
        session.removeAttribute(ATTR_SASL_SERVER);
        session.removeAttribute(ATTR_EXPIRY);

        response.setStatus(HttpServletResponse.SC_OK);
    } else {
        Random rand = getRandom(session);
        id = String.valueOf(rand.nextLong());
        session.setAttribute(ATTR_ID, id);
        session.setAttribute(ATTR_SASL_SERVER, saslServer);
        session.setAttribute(ATTR_EXPIRY, System.currentTimeMillis() + SASL_EXCHANGE_EXPIRY);

        response.setStatus(HttpServletResponse.SC_OK);

        Map<String, Object> outputObject = new LinkedHashMap<String, Object>();
        outputObject.put("id", id);
        outputObject.put("challenge", new String(Base64.encodeBase64(challenge)));

        final PrintWriter writer = response.getWriter();

        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(SerializationConfig.Feature.INDENT_OUTPUT, true);
        mapper.writeValue(writer, outputObject);
    }
}

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From source file:org.apache.hadoop.hive.ql.exec.vector.VectorRandomRowSource.java

public static Object randomObject(int column, Random r, PrimitiveCategory[] primitiveCategories,
        PrimitiveTypeInfo[] primitiveTypeInfos, String[] alphabets, boolean addEscapables,
        String needsEscapeStr) {//from   ww  w  .  j av  a 2 s  . c o m
    PrimitiveCategory primitiveCategory = primitiveCategories[column];
    PrimitiveTypeInfo primitiveTypeInfo = primitiveTypeInfos[column];
    try {
        switch (primitiveCategory) {
        case BOOLEAN:
            return Boolean.valueOf(r.nextInt(1) == 1);
        case BYTE:
            return Byte.valueOf((byte) r.nextInt());
        case SHORT:
            return Short.valueOf((short) r.nextInt());
        case INT:
            return Integer.valueOf(r.nextInt());
        case LONG:
            return Long.valueOf(r.nextLong());
        case DATE:
            return RandomTypeUtil.getRandDate(r);
        case FLOAT:
            return Float.valueOf(r.nextFloat() * 10 - 5);
        case DOUBLE:
            return Double.valueOf(r.nextDouble() * 10 - 5);
        case STRING:
        case CHAR:
        case VARCHAR: {
            String result;
            if (alphabets != null && alphabets[column] != null) {
                result = RandomTypeUtil.getRandString(r, alphabets[column], r.nextInt(10));
            } else {
                result = RandomTypeUtil.getRandString(r);
            }
            if (addEscapables && result.length() > 0) {
                int escapeCount = 1 + r.nextInt(2);
                for (int i = 0; i < escapeCount; i++) {
                    int index = r.nextInt(result.length());
                    String begin = result.substring(0, index);
                    String end = result.substring(index);
                    Character needsEscapeChar = needsEscapeStr.charAt(r.nextInt(needsEscapeStr.length()));
                    result = begin + needsEscapeChar + end;
                }
            }
            switch (primitiveCategory) {
            case STRING:
                return result;
            case CHAR:
                return new HiveChar(result, ((CharTypeInfo) primitiveTypeInfo).getLength());
            case VARCHAR:
                return new HiveChar(result, ((VarcharTypeInfo) primitiveTypeInfo).getLength());
            default:
                throw new Error("Unknown primitive category " + primitiveCategory);
            }
        }
        case BINARY:
            return getRandBinary(r, 1 + r.nextInt(100));
        case TIMESTAMP:
            return RandomTypeUtil.getRandTimestamp(r);
        case INTERVAL_YEAR_MONTH:
            return getRandIntervalYearMonth(r);
        case INTERVAL_DAY_TIME:
            return getRandIntervalDayTime(r);
        case DECIMAL:
            return getRandHiveDecimal(r, (DecimalTypeInfo) primitiveTypeInfo);
        default:
            throw new Error("Unknown primitive category " + primitiveCategory);
        }
    } catch (Exception e) {
        throw new RuntimeException("randomObject failed on column " + column + " type " + primitiveCategory, e);
    }
}

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From source file:org.sakaiproject.kernel.test.AuthZServiceKernelUnitT.java

/**
 * @param request/*from  w ww  .  j a  v  a  2s .  com*/
 * @param response
 * @param session
 */
private void setupRequest(HttpServletRequest request, HttpServletResponse response, HttpSession session,
        String userName) {
    User u = new InternalUser(userName);
    Random r = new Random();
    long sessionID = r.nextLong();
    expect(request.getRemoteUser()).andReturn(userName).anyTimes();
    expect(request.getSession()).andReturn(session).anyTimes();
    expect(request.getSession(true)).andReturn(session).anyTimes();
    expect(request.getSession(false)).andReturn(session).anyTimes();
    expect(session.getId()).andReturn(userName + "SESSIONID-123-A" + sessionID).anyTimes();
    expect(request.getRequestedSessionId()).andReturn(userName + "SESSIONID-123-A" + sessionID).anyTimes();
    Cookie cookie = new Cookie("SAKAIID", "SESSIONID-123-A" + sessionID);
    expect(request.getCookies()).andReturn(new Cookie[] { cookie }).anyTimes();

    expect(session.getAttribute("check-valid")).andReturn(null).anyTimes();
    response.addCookie((Cookie) anyObject());
    expectLastCall().anyTimes();

    expect(session.getAttribute(SessionImpl.USER)).andReturn(u).anyTimes();
    expect(request.getAttribute("_uuid")).andReturn(null).anyTimes();
    expect(request.getAttribute("_no_session")).andReturn(null).anyTimes();
}

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