com.alibaba.tmq.common.util

类 RandomUtil

java.lang.Object

com.alibaba.tmq.common.util.RandomUtil

所有已实现的接口:

Constants

public class RandomUtil
extends Object
implements Constants

Random相关工具

作者:

tianyao.myc

字段概要

字段

限定符和类型	字段和说明
static Random	random 随机生成数字

从接口继承的字段 com.alibaba.tmq.common.constants.Constants

AVAILABLE_PROCESSORS, BLANK, BLANK_SPLIT, CENTER_UNIT, CHAR_AMOUNT, COLON, COMMA, COMMA_ENCODED, COOKIE_NAME_CLUSTER, decimalFormat, DEFAULT_ADVANCE_THREADS, DEFAULT_CHARSET, DEFAULT_CONFIG_CLIENT_DATA_ID, DEFAULT_CONNECTION_TIMEOUT, DEFAULT_CONSUMER_QUEUE_SIZE, DEFAULT_CONSUMER_THREAD_AMOUNT, DEFAULT_CORE_FIRE_THREADS, DEFAULT_GROUP_SERVER_AMOUNT, DEFAULT_HEART_BEAT_CHECK_TIMEOUT, DEFAULT_HEART_BEAT_INTERVAL_TIME, DEFAULT_INSTANCE_NAME, DEFAULT_INVOKE_TIMEOUT, DEFAULT_LISTENER_PORT, DEFAULT_LOAD_MESSAGE_INTERVAL_TIME, DEFAULT_LOAD_MESSAGE_THREADS, DEFAULT_MAX_ACTIVE, DEFAULT_MAX_FIRE_THREADS, DEFAULT_PAGE_SIZE, DEFAULT_POLL_TIMEOUT, DEFAULT_REMOTING_THREADS, DEFAULT_ZK_CONNECTION_TIMEOUT, DEFAULT_ZK_ROOT_PATH, DEFAULT_ZK_SESSION_TIMEOUT, EQUAL_CHAR, FILE_SEPARATOR, FIRE_QUEUE_SIZE, FORWARD_SLASH, HOME_PATH, HORIZONTAL_LINE, INCREASE_RATE, INIT_DELAY, LEVEL_QUEUE_SIZE, LOGGER_KEY, MAX_RETRY_COUNT, NEWLINE, NULL, PATTERN, POINT, PULL_SLEEP_TIME, REQUEST_CODE, ROLE_TYPE_CONSUMER, ROLE_TYPE_PRODUCER, SEPARATOR, SPLIT_CHAR, SPLIT_POINT, SPLIT_STR, SPLIT_STRING, STAGE_FALSE, STAGE_TRUE, STATUS_RUNNING, STATUS_STOP, TABLE_AMOUNT, TIME_FORMAT_CHART, TIME_FORMAT_HOUR, TIME_FORMAT_MILLISECONDS, TIME_FORMAT_SECONDS, TIME_FORMAT_STRING, TMQ_ACTIVE_REGION, TMQ_BASE_SECTION, TMQ_COMPRESSION_REGION, TMQ_CONFIG, TMQ_CONFIG_FILE, TMQ_DATA, TMQ_DATA_COMPRESSION_EXT, TMQ_DATA_ENABLE, TMQ_DATA_EXT, TMQ_ENVIRONMENT_CONFIG_DATA_ID, TMQ_LEVEL_DAY, TMQ_LEVEL_HOUR, TMQ_LEVEL_MONTH, TMQ_LEVEL_YEAR, TMQ_MASTER_DATA, TMQ_MESSAGE_TABLE_NAME, TMQ_NEW_REGION, TMQ_OLD_REGION, TMQ_SLAVE_DATA, TRACE_LOGGER_NAME, UNDERLINE, USER_HOME, WILDCARD, ZK_CLIENT_CLUSTER, ZK_CONSOLE_CLUSTER, ZK_SERVER_CLUSTER

构造器概要

构造器

构造器和说明
RandomUtil()

方法概要

限定符和类型	方法和说明
static <K,V> Map.Entry<K,V>	getRandomEntry4Map(Map<K,V> objectMap) 随机获取Map里元素的Entry objectMap
static int	getRandomIndex(List<? extends Object> objectList) 获取随机索引 objectList
static <T> T	getRandomObject4List(List<T> objectList) 随机获取列表里元素 objectList
static <K,V> V	getRandomObject4Map(Map<K,V> objectMap) 随机获取Map里元素 objectMap

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

random

public static final Random random

随机生成数字

构造器详细资料

RandomUtil

public RandomUtil()

方法详细资料

getRandomObject4List

public static <T> T getRandomObject4List(List<T> objectList)

随机获取列表里元素 objectList

getRandomObject4Map

public static <K,V> V getRandomObject4Map(Map<K,V> objectMap)

随机获取Map里元素 objectMap

getRandomEntry4Map

public static <K,V> Map.Entry<K,V> getRandomEntry4Map(Map<K,V> objectMap)

随机获取Map里元素的Entry objectMap

getRandomIndex

public static int getRandomIndex(List<? extends Object> objectList)

获取随机索引 objectList