001/*
002 * Copyright 2022-2026 Revetware LLC.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.soklet;
018
019import org.jspecify.annotations.NonNull;
020
021import javax.annotation.concurrent.ThreadSafe;
022
023/**
024 * Thread-safe listener registered with an MCP subscription-event publisher.
025 * <p>
026 * Publishers may invoke one listener concurrently for independent events.
027 * Listener implementations should return promptly and must not assume which
028 * thread performs delivery.
029 *
030 * @author <a href="https://www.revetkn.com">Mark Allen</a>
031 */
032@ThreadSafe
033@FunctionalInterface
034public interface McpSubscriptionEventListener {
035        /**
036         * Receives one coarse subscription-change event.
037         *
038         * @param subscriptionEvent subscription-change event
039         */
040        void onEvent(@NonNull McpSubscriptionEvent subscriptionEvent);
041}