Add File

agents-flex-chain/agents-flex-chain-js/src/main/java/com/agentsflex/chain/node/JsExecNode.java

@@ -0,0 +1,98 @@
+/*
+ *  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.chain.node;
+
+import com.agentsflex.core.chain.Chain;
+import com.agentsflex.core.chain.node.CodeNode;
+import com.agentsflex.core.util.graalvm.JsInteropUtils;
+import org.graalvm.polyglot.Context;
+import org.graalvm.polyglot.HostAccess;
+import org.graalvm.polyglot.Value;
+
+import java.util.Map;
+
+public class JsExecNode extends CodeNode {
+
+    // 使用 Context.Builder 构建上下文，线程安全
+    private static final Context.Builder CONTEXT_BUILDER = Context.newBuilder("js")
+        .option("engine.WarnInterpreterOnly", "false")
+        .allowHostAccess(HostAccess.ALL)       // 允许访问 Java 对象的方法和字段
+        .allowHostClassLookup(className -> false) // 禁止动态加载任意 Java 类
+        .option("js.ecmascript-version", "2021");  // 使用较新的 ECMAScript 版本
+
+
+    @Override
+    protected Map<String, Object> executeCode(String code, Chain chain) {
+        try (Context context = CONTEXT_BUILDER.build()) {
+            Value bindings = context.getBindings("js");
+
+            Map<String, Object> all = chain.getMemory().getAll();
+            all.forEach((key, value) -> {
+                if (!key.contains(".")) {
+                    bindings.putMember(key, JsInteropUtils.wrapJavaValueForJS(context, value));
+                }
+            });
+
+            // 注入参数
+            Map<String, Object> parameterValues = chain.getParameterValues(this);
+            if (parameterValues != null) {
+                for (Map.Entry<String, Object> entry : parameterValues.entrySet()) {
+                    bindings.putMember(entry.getKey(), JsInteropUtils.wrapJavaValueForJS(context, entry.getValue()));
+                }
+            }
+
+            bindings.putMember("_chain", chain);
+            bindings.putMember("_context", chain.getNodeContext(this.id));
+
+
+            // 在 JS 中创建 _result 对象
+            context.eval("js", "var _result = {};");
+
+            // 注入 _chain 和 _context
+            bindings.putMember("_chain", chain);
+            bindings.putMember("_context", chain.getNodeContext(this.id));
+
+            // 执行用户脚本
+            context.eval("js", code);
+
+            Value resultValue = bindings.getMember("_result");
+
+            return GraalToFastjsonUtils.toJSONObject(resultValue);
+
+        } catch (Exception e) {
+            throw new RuntimeException("Polyglot JS 脚本执行失败: " + e.getMessage(), e);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "JsExecNode{" +
+            "inwardEdges=" + inwardEdges +
+            ", code='" + code + '\'' +
+            ", description='" + description + '\'' +
+            ", parameters=" + parameters +
+            ", outputDefs=" + outputDefs +
+            ", id='" + id + '\'' +
+            ", name='" + name + '\'' +
+            ", async=" + async +
+            ", outwardEdges=" + outwardEdges +
+            ", condition=" + condition +
+            ", memory=" + memory +
+            ", nodeStatus=" + nodeStatus +
+            '}';
+    }
+
+}