org.springframework.messaging.simp.broker.SubscriptionRegistry.java Source code

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Here is the source code for org.springframework.messaging.simp.broker.SubscriptionRegistry.java

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/*
 * Copyright 2002-2018 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.broker;

import org.springframework.messaging.Message;
import org.springframework.util.MultiValueMap;

/**
 * A registry of subscription by session that allows looking up subscriptions.
 *
 * @author Rossen Stoyanchev
 * @since 4.0
 */
public interface SubscriptionRegistry {

    /**
     * Register a subscription represented by the given message.
     * @param subscribeMessage the subscription request
     */
    void registerSubscription(Message<?> subscribeMessage);

    /**
     * Unregister a subscription.
     * @param unsubscribeMessage the request to unsubscribe
     */
    void unregisterSubscription(Message<?> unsubscribeMessage);

    /**
     * Remove all subscriptions associated with the given sessionId.
     */
    void unregisterAllSubscriptions(String sessionId);

    /**
     * Find all subscriptions that should receive the given message.
     * The map returned is safe to iterate and will never be modified.
     * @param message the message
     * @return a {@code MultiValueMap} with sessionId-subscriptionId pairs
     * (possibly empty)
     */
    MultiValueMap<String, String> findSubscriptions(Message<?> message);

}