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 server-owned control plane for localized MCP catalog
025 * invalidation.
026 * <p>
027 * The invalidator is local to one server. Applications distribute and install
028 * immutable translation snapshots themselves, then invoke it on every
029 * applicable instance.
030 *
031 * @author <a href="https://www.revetkn.com">Mark Allen</a>
032 */
033@ThreadSafe
034public interface McpLocalizationCatalogInvalidator {
035        /** @return whether localization was enabled when the server was built */
036        @NonNull
037        Boolean isEnabled();
038
039        /**
040         * Invalidates future derived localized render state and publishes coarse
041         * framework-owned list-change notifications to eligible local streams. The
042         * call returns after the current generation accepts or coalesces the
043         * invalidation, not after client delivery. It is safe before start and after
044         * stop, when there is no active stream to notify.
045         *
046         * @throws IllegalStateException if localization is disabled
047         */
048        void invalidateCatalogs();
049}