2 * ============LICENSE_START========================================================
3 * Copyright (C) 2022-2023 Nordix Foundation
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.cps.ncmp.impl.inventory.sync;
23 import com.hazelcast.config.MapConfig;
24 import com.hazelcast.config.QueueConfig;
25 import com.hazelcast.map.IMap;
26 import java.util.concurrent.BlockingQueue;
27 import java.util.concurrent.locks.Lock;
28 import lombok.extern.slf4j.Slf4j;
29 import org.onap.cps.ncmp.impl.cache.HazelcastCacheConfig;
30 import org.onap.cps.spi.model.DataNode;
31 import org.springframework.context.annotation.Bean;
32 import org.springframework.context.annotation.Configuration;
35 * Core infrastructure of the hazelcast distributed caches for Module Sync and Data Sync use cases.
39 public class SynchronizationCacheConfig extends HazelcastCacheConfig {
41 public static final int MODULE_SYNC_STARTED_TTL_SECS = 600;
42 public static final int DATA_SYNC_SEMAPHORE_TTL_SECS = 1800;
44 private static final QueueConfig commonQueueConfig = createQueueConfig("defaultQueueConfig");
45 private static final MapConfig moduleSyncStartedConfig = createMapConfig("moduleSyncStartedConfig");
46 private static final MapConfig dataSyncSemaphoresConfig = createMapConfig("dataSyncSemaphoresConfig");
47 private static final String LOCK_NAME_FOR_WORK_QUEUE = "workQueueLock";
50 * Module Sync Distributed Queue Instance.
52 * @return queue of cm handles (data nodes) that need module sync
55 public BlockingQueue<DataNode> moduleSyncWorkQueue() {
56 return getOrCreateHazelcastInstance(commonQueueConfig).getQueue("moduleSyncWorkQueue");
60 * Module Sync started (and maybe finished) on cm handles (ids).
62 * @return Map of cm handles (ids) and objects (not used really) for which module sync has started or been completed
65 public IMap<String, Object> moduleSyncStartedOnCmHandles() {
66 return getOrCreateHazelcastInstance(moduleSyncStartedConfig).getMap(
67 "moduleSyncStartedOnCmHandles");
71 * Data Sync Distributed Map Instance.
73 * @return configured map of data sync semaphores
76 public IMap<String, Boolean> dataSyncSemaphores() {
77 return getOrCreateHazelcastInstance(dataSyncSemaphoresConfig).getMap("dataSyncSemaphores");
81 * Retrieves a distributed lock used to control access to the work queue for module synchronization.
82 * This lock ensures that the population and modification of the work queue are thread-safe and
83 * protected from concurrent access across different nodes in the distributed system.
84 * The lock guarantees that only one instance of the application can populate or modify the
85 * module sync work queue at a time, preventing race conditions and potential data inconsistencies.
86 * The lock is obtained using the Hazelcast CP Subsystem's {@link Lock}, which provides
87 * strong consistency guarantees for distributed operations.
89 * @return a {@link Lock} instance used for synchronizing access to the work queue.
92 public Lock workQueueLock() {
93 // TODO Method below does not use commonQueueConfig for creating lock (Refactor later)
94 return getOrCreateHazelcastInstance(commonQueueConfig).getCPSubsystem().getLock(LOCK_NAME_FOR_WORK_QUEUE);