net.dreamlu.mica.core.utils

Class ThreadLocalUtil

java.lang.Object

net.dreamlu.mica.core.utils.ThreadLocalUtil

public class ThreadLocalUtil
extends Object

ThreadLocal 工具类,通过在ThreadLocal存储map信息,来实现在ThreadLocal中维护多个信息
e.g. ThreadLocalUtils.put("key",value);
ThreadLocalUtils.get("key");
ThreadLocalUtils.remove("key");
ThreadLocalUtils.getAndRemove("key");
ThreadLocalUtils.get("key",()->defaultValue);
ThreadLocalUtils.clear();


Since:

2.0

Author:

zhouhao

Constructor Summary

Constructors

Constructor and Description
ThreadLocalUtil()

Method Summary

Modifier and Type	Method and Description
static void	clear() 清空ThreadLocal
static <T> T	get(String key) 从ThreadLocal中获取值
static Map<String,Object>	getAll()
static <T> T	getAndRemove(String key) 获取一个值后然后删除掉
static <T> T	getIfAbsent(String key, Supplier<T> supplierOnNull) 从ThreadLocal中获取值,并指定一个当值不存在的提供者
static void	put(Map<String,Object> map) 设置一个值到ThreadLocal
static <T> T	put(String key, T value) 设置一个值到ThreadLocal
static void	remove(String key) 删除参数对应的值

Methods inherited from class java.lang.Object

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

Constructor Detail

ThreadLocalUtil

public ThreadLocalUtil()

Method Detail

getAll

public static Map<String,Object> getAll()

Returns:

threadLocal中的全部值

put

public static <T> T put(String key,
                        T value)

设置一个值到ThreadLocal

Type Parameters:

T - 值的类型

Parameters:

key - 键

value - 值

Returns:

被放入的值

See Also:

Map.put(Object, Object)

put

public static void put(Map<String,Object> map)

设置一个值到ThreadLocal

Parameters:

map - map

See Also:

Map.putAll(Map)

remove

public static void remove(String key)

删除参数对应的值

Parameters:

key -

See Also:

Map.remove(Object)

clear

public static void clear()

清空ThreadLocal

See Also:

Map.clear()

get

@Nullable
public static <T> T get(String key)

从ThreadLocal中获取值

Type Parameters:

T - 值泛型

Parameters:

key - 键

Returns:

值, 不存在则返回null, 如果类型与泛型不一致, 可能抛出ClassCastException

See Also:

Map.get(Object), ClassCastException

getIfAbsent

@Nullable
public static <T> T getIfAbsent(String key,
                                          Supplier<T> supplierOnNull)

从ThreadLocal中获取值,并指定一个当值不存在的提供者

See Also:

Supplier

getAndRemove

@Nullable
public static <T> T getAndRemove(String key)

获取一个值后然后删除掉

Type Parameters:

T - 值类型

Parameters:

key - 键

Returns:

值, 不存在则返回null

See Also:

this#get(String), this#remove(String)