001/**
002 * Copyright (c) 2025-2026, Michael Yang 杨福海 (fuhai999@gmail.com).
003 * <p>
004 * Licensed under the GNU Lesser General Public License (LGPL) ,Version 3.0 (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 * <p>
008 * http://www.gnu.org/licenses/lgpl-3.0.txt
009 * <p>
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 */
016package dev.tinyflow.core.chain.repository;
017
018import dev.tinyflow.core.chain.NodeState;
019import dev.tinyflow.core.util.MapUtil;
020
021import java.util.EnumSet;
022import java.util.Map;
023import java.util.concurrent.ConcurrentHashMap;
024
025public class InMemoryNodeStateRepository implements NodeStateRepository {
026
027    private static final Map<String, NodeState> chainStateMap = new ConcurrentHashMap<>();
028
029    @Override
030    public NodeState load(String instanceId, String nodeId) {
031        String key = instanceId + "." + nodeId;
032        return MapUtil.computeIfAbsent(chainStateMap, key, k -> {
033            NodeState nodeState = new NodeState();
034            nodeState.setChainInstanceId(instanceId);
035            nodeState.setNodeId(nodeId);
036            return nodeState;
037        });
038    }
039
040    @Override
041    public boolean tryUpdate(NodeState newState, EnumSet<NodeStateField> fields, long version) {
042        chainStateMap.put(newState.getChainInstanceId() + "." + newState.getNodeId(), newState);
043        return true;
044    }
045}