Java Code Examples for org.apache.commons.lang3.RandomUtils#nextInt()

private void pickupHostAllocation(AllocationPoint point) {
    int numBuckets = configuration.getNumberOfGcThreads();
    long bucketId = RandomUtils.nextInt(0, numBuckets);

    long reqMemory = point.getNumberOfBytes();

    zeroUseCounter.addAndGet(reqMemory);

    point.setBucketId(bucketId);

    if (!zeroAllocations.containsKey(bucketId)) {
        log.debug("Creating bucketID: " + bucketId);
        synchronized (this) {
            if (!zeroAllocations.containsKey(bucketId)) {
                zeroAllocations.put(bucketId, new ConcurrentHashMap<Long, Long>());
            }
        }
    }

    zeroAllocations.get(bucketId).put(point.getObjectId(), point.getObjectId());
}
 

private void pickupHostAllocation(AllocationPoint point) {
    int numBuckets = configuration.getNumberOfGcThreads();
    long bucketId = RandomUtils.nextInt(0, numBuckets);

    long reqMemory = AllocationUtils.getRequiredMemory(point.getShape());

    zeroUseCounter.addAndGet(reqMemory);

    point.setBucketId(bucketId);

    if (!zeroAllocations.containsKey(bucketId)) {
        log.debug("Creating bucketID: " + bucketId);
        synchronized (this) {
            if (!zeroAllocations.containsKey(bucketId)) {
                zeroAllocations.put(bucketId, new ConcurrentHashMap<Long, Long>());
            }
        }
    }

    zeroAllocations.get(bucketId).put(point.getObjectId(), point.getObjectId());
}
 

/**
 * Gets a random element from the given collection where each element has a weight provided by weightFunction.
 * A higher weight makes an element more likely to be selected.
 *
 * @return A random element or null if the collection was empty.
 */
@Nonnull
public static <T> Optional<T> randomElement(Collection<T> collection, ToIntFunction<T> weightFunction)
{
    int totalWeight = collection.stream().mapToInt(weightFunction).sum();
    int randomWeight = RandomUtils.nextInt(1, totalWeight + 1);

    for (T t : collection)
    {
        randomWeight -= weightFunction.applyAsInt(t);
        if (randomWeight <= 0)
            return Optional.of(t);
    }

    return Optional.empty();
}
 

/**
 * 发送邮箱验证码
 * @param email 邮箱账号
 * @param request
 * @return
 */
@ResponseBody
@RequestMapping(value = "/sendEmail",method = RequestMethod.POST)
public ResponseEntity sendEmail(String email, HttpServletRequest request){
    if(email==null||!ValidateUtils.isEmail(email)){
        return new ResponseEntity(400,"error","邮箱账号错误!");
    }
    //发送注册邮件
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+ request.getContextPath()+"/";
    Map<String,Object> modelMap=new HashMap<String,Object>();
    modelMap.put("USERNAME","baby慕慕");
    modelMap.put("LOGOIMG",basePath+"resources/img/logo.png");
    int verifyCode = RandomUtils.nextInt(100000, 999999);
    request.getSession().setAttribute("VERIFYCODE",String.valueOf(verifyCode));
    modelMap.put("VERIFYCODE",verifyCode);
    modelMap.put("IFORGOTURL",basePath+"system/iforget");
    modelMap.put("LOGINURL",basePath+"system/login");
    modelMap.put("OFFICIALURL",basePath);
    String content= VelocityEngineUtils.mergeTemplateIntoString(velocityEngine, "tpl/verifyCodeEmail.html","UTF-8",modelMap);
    try {
        boolean sendSuccess=emailService.send(email,null,"baby慕慕开放平台-验证码找回密码",content);
        if(sendSuccess){
            return new ResponseEntity(200,"success","验证码发送成功");
        }
    } catch (EmailException e) {
        e.printStackTrace();
    }
    return new ResponseEntity(400,"error","邮箱发送失败!");
}
 

private Connection randomDataSource() {
    if (dataSourceMap.size() == 1) {
        return dataSourceMap.values().iterator().next();
    }
    Set<Map.Entry<String, Connection>> entrySet = dataSourceMap.entrySet();
    List<Map.Entry<String, Connection>> entryArrayList = new ArrayList<>(entrySet);
    int randomIdx = RandomUtils.nextInt(0, entryArrayList.size());
    return entryArrayList.get(randomIdx).getValue();
}
 

public int nextValue(int start, int end) {
    start = start < this.start? this.start: start;
    end = end > this.end? this.end: end;

    if (serverPort == 0){
        synchronized (this){
            if (serverPort == 0){
                serverPort = RandomUtils.nextInt(start, end);
            }
        }
    }
    return serverPort;
}
 

@Test
public void testCreateAndGet() {
	PayOrder.Builder builder = PayOrder.newBuilder();
	long uid = System.nanoTime();
	String code = UUID.randomUUID().toString();
	builder.setId(System.currentTimeMillis());
	builder.setAppId("myapp");
	builder.setCreateTime(new Date().getTime());
	builder.setCurrentKey(19283745);
	builder.setDestPayType(1982);
	builder.setSubId(uid);
	Calendar expireTime = Calendar.getInstance();
	expireTime.add(Calendar.HOUR, 1);
	builder.setExpireTime(expireTime.getTime().getTime());
	int fee = RandomUtils.nextInt(1, 1000000);
	builder.setFee(fee);
	builder.setFeeReal(RandomUtils.nextInt(1, fee));
	builder.setFeeUnit(FeeUnit.CNY_VALUE);
	builder.setNotifyUrl("http://localhost/notify");
	builder.setReturnUrl("http://localhost/returnUrl");
	builder.setOrderDetail("OrderDetail");
	builder.setOrderId(UUID.randomUUID().toString());
	repository.create(builder.build());
	PayOrder order = repository.get(uid, code);
	assertEquals(order.getSubId(), uid);

}
 

/**
 * 创建一个随机数.
 *
 * @return 随机六位数+当前时间yyyyMMddHHmmss
 */
public static String randomCodeUtil() {
    String cteateTime = DateFormatUtils.format(new Date(), "yyyyMMddHHmmss");
    int num = RandomUtils.nextInt(100000, 1000000);
    String result = cteateTime + StringUtils.leftPad(num + "", 6, "0");
    return result;
}
 

public CarreraAsyncRequest(UpstreamJob job, AtomicInteger permits, String groupCluster, BlockingQueue<CarreraAsyncRequest> retryQueue, Set<CarreraAsyncRequest> inflightRequests, ScheduledExecutorService scheduler) {
    this.job = job;
    this.permits = permits;
    this.groupCluster = groupCluster;
    this.retryRequestQueue = retryQueue;
    this.scheduler = scheduler;
    this.inflightRequests = inflightRequests;
    startIdx = RandomUtils.nextInt(0, job.getUrls().size());
}
 

@Test
public void testSetApiServerPort() {
	for (int i = 0; i < NUMBER_ITERATIONS; ++i) {
		int port = RandomUtils.nextInt(0, 65536);
		WinRegistry.setApiServerPort(port);
		assertPort(port);
	}
}
 

public static java.sql.Connection getConnection() throws SQLException {
	if (cpdsList == null || cpdsList.size() == 0) {
		return C3P0PoolManager.getConnection();
	}
	int index = RandomUtils.nextInt(0, cpdsList.size());// [0,len)
	return cpdsList.get(index).getConnection();
}
 

@Override
public void generateLoad() throws Exception {
  int index = RandomUtils.nextInt();
  String keyName = getKeyName(index);
  fsBucket.createDirectory(keyName);
  fsBucket.readDirectory(keyName);
}
 

public static String generatePayload(int payloadSize, String dictionary) {
    StringBuilder payload = new StringBuilder();

    for(int i = 0; i < payloadSize; i++) {
        int randomInt = RandomUtils.nextInt(0, dictionary.length() - 1);
        payload.append(dictionary.charAt(randomInt));
    }

    return payload.toString();
}
 

@Override
public String getUserAgent() {
    int index = RandomUtils.nextInt(0, defUAs.length);
    return defUAs[index];
}
 

private String randomGender() {
    return RandomUtils.nextInt(0, 2) == 1 ? "male" : "female";
}
 

private SampledDataSource createSampledDataSource(long timestamp, int maxConnectionSize) {
    int testObjectSize = RandomUtils.nextInt(1, CREATE_TEST_OBJECT_MAX_SIZE);
    List<DataSourceBo> dataSourceBoList = DataSourceTestUtils.createDataSourceBoList(1, testObjectSize, maxConnectionSize);
    return sampler.sampleDataPoints(0, timestamp, dataSourceBoList, null);
}
 

protected short getNextShard() {
    return (short) RandomUtils.nextInt(0, numShards);
}
 

public static String randomUsState() {
  return usStateArray[RandomUtils.nextInt(0, usStateArray.length)];
}
 

/** 生成订单编号 */
public static String generateOrdrNo() {
	String cc = DateUtils.currentTime()+(RandomUtils.nextInt(10000, 90000));
	//BigInteger bi = new BigInteger(cc);
	return cc;
}
 

/**
 * Given a document list generates a randomly generated sql query which can find only and only the documents
 * <p>
 * The generated query may have a top, orderby, top and orderby.
 *
 * @param documentList list of documents to be queried for
 * @return SqlQuerySpec
 */
private SqlQuerySpec generateQuery(List<Document> documentList) {
    int top = RandomUtils.nextInt(0, MAX_TOP_QUERY_COUNT);
    boolean useOrderBy = RandomUtils.nextBoolean();

    return generateQuery(documentList, top >= documentList.size() ? top : null, useOrderBy);
}