spring SimpUserRegistry 源码
spring SimpUserRegistry 代码
文件路径：/spring-messaging/src/main/java/org/springframework/messaging/simp/user/SimpUserRegistry.java
/*
* Copyright 2002-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.messaging.simp.user;
import java.util.Set;
import org.springframework.lang.Nullable;
/**
* A registry of currently connected users.
*
* @author Rossen Stoyanchev
* @since 4.2
*/
public interface SimpUserRegistry {
/**
* Get the user for the given name.
* @param userName the name of the user to look up
* @return the user, or {@code null} if not connected
*/
@Nullable
SimpUser getUser(String userName);
/**
* Return a snapshot of all connected users.
* <p>The returned set is a copy and will not reflect further changes.
* @return the connected users, or an empty set if none
*/
Set<SimpUser> getUsers();
/**
* Return the count of all connected users.
* @return the number of connected users
* @since 4.3.5
*/
int getUserCount();
/**
* Find subscriptions with the given matcher.
* @param matcher the matcher to use
* @return a set of matching subscriptions, or an empty set if none
*/
Set<SimpSubscription> findSubscriptions(SimpSubscriptionMatcher matcher);
}
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