SimpUserRegistry (Spring Framework 5.2.12.RELEASE API)

所有已知实现类:
DefaultSimpUserRegistry, MultiServerUserRegistry
```
public interface SimpUserRegistry
```
A registry of currently connected users.
从以下版本开始:
4.2
作者:
Rossen Stoyanchev

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`Set<SimpSubscription>`	`findSubscriptions(SimpSubscriptionMatcher matcher)`	Find subscriptions with the given matcher.
`SimpUser`	`getUser(String userName)`	Get the user for the given name.
`int`	`getUserCount()`	Return the count of all connected users.
`Set<SimpUser>`	`getUsers()`	Return a snapshot of all connected users.

- 方法详细资料
  - getUser
```
@Nullable
SimpUser getUser(String userName)
```
    Get the user for the given name.
    参数:
    userName - the name of the user to look up
    返回:
    the user, or null if not connected
  - getUsers
```
Set<SimpUser> getUsers()
```
    Return a snapshot of all connected users.
    The returned set is a copy and will not reflect further changes.
    返回:
    the connected users, or an empty set if none
  - getUserCount
```
int getUserCount()
```
    Return the count of all connected users.
    返回:
    the number of connected users
    从以下版本开始:
    4.3.5
  - findSubscriptions
```
Set<SimpSubscription> findSubscriptions(SimpSubscriptionMatcher matcher)
```
    Find subscriptions with the given matcher.
    参数:
    matcher - the matcher to use
    返回:
    a set of matching subscriptions, or an empty set if none