Add File

agents-flex-core/src/main/java/com/agentsflex/core/chain/impl/LoopChain.java

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+/*
+ *  Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.agentsflex.core.chain.impl;
+
+import com.agentsflex.core.chain.ChainEdge;
+import com.agentsflex.core.chain.NodeContext;
+import com.agentsflex.core.chain.node.StartNode;
+
+public class LoopChain extends SequentialChain {
+
+    private int maxLoopCount = Integer.MAX_VALUE;
+    private int executeCount = 0;
+
+    public LoopChain() {
+        this.addNode(new StartNode());
+    }
+
+    public int getMaxLoopCount() {
+        return maxLoopCount;
+    }
+
+    public void setMaxLoopCount(int maxLoopCount) {
+        this.maxLoopCount = maxLoopCount;
+    }
+
+    public void close() {
+        if (this.nodes.size() < 2) {
+            return;
+        }
+
+        String sourceId = this.nodes.get(this.nodes.size() - 1).getId();
+        String targetId = this.nodes.get(1).getId();
+
+        ChainEdge edge = new ChainEdge();
+        edge.setSource(sourceId);
+        edge.setTarget(targetId);
+
+        super.addEdge(edge);
+    }
+
+    @Override
+    protected void onNodeExecuteAfter(NodeContext nodeContext) {
+        if (executeCount++ >= maxLoopCount) {
+            stopNormal("Loop to the maxLoopCount limit");
+        }
+    }
+
+}