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 javax.annotation.concurrent.ThreadSafe;
020
021/**
022 * Thread-safe listener registration returned by an MCP subscription-event or
023 * task-event publisher.
024 * <p>
025 * Closing a registration is idempotent. It unsubscribes only its listener and
026 * does not close the application-owned publisher. A delivery already selected
027 * or in flight when close takes effect may begin or finish after
028 * {@link #close()} returns; no later delivery may be selected for that
029 * registration. Soklet invokes {@code close()} asynchronously and never
030 * overlaps invocations for the same registration. If an invocation throws,
031 * Soklet may retry it until one invocation succeeds; after a successful
032 * invocation, Soklet does not invoke it again. An in-flight invocation may
033 * outlive the server's bounded shutdown wait, in which case cleanup remains
034 * residual state and restart cannot proceed until the invocation completes
035 * successfully.
036 *
037 * @author <a href="https://www.revetkn.com">Mark Allen</a>
038 */
039@ThreadSafe
040public interface McpSubscriptionEventRegistration extends AutoCloseable {
041        /** Idempotently unregisters the associated listener. */
042        @Override
043        void close();
044}