enhancement 新增graaljs脚本插件

liteflow-script-plugin/liteflow-script-graaljs/pom.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>liteflow-script-plugin</artifactId>
+        <groupId>com.yomahub</groupId>
+        <version>${revision}</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>liteflow-script-graaljs</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.yomahub</groupId>
+            <artifactId>liteflow-core</artifactId>
+            <version>${revision}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.graalvm.js</groupId>
+            <artifactId>js</artifactId>
+        </dependency>
+    </dependencies>
+</project>

liteflow-script-plugin/liteflow-script-graaljs/src/main/java/com/yomahub/liteflow/script/graaljs/GraalJavaScriptExecutor.java

@@ -0,0 +1,105 @@
+package com.yomahub.liteflow.script.graaljs;
+
+import cn.hutool.core.bean.BeanUtil;
+import cn.hutool.core.util.ObjectUtil;
+import cn.hutool.core.util.StrUtil;
+import com.yomahub.liteflow.script.ScriptBeanManager;
+import com.yomahub.liteflow.script.ScriptExecuteWrap;
+import com.yomahub.liteflow.script.ScriptExecutor;
+import com.yomahub.liteflow.script.exception.ScriptLoadException;
+import com.yomahub.liteflow.slot.DataBus;
+import com.yomahub.liteflow.slot.Slot;
+import com.yomahub.liteflow.util.CopyOnWriteHashMap;
+import org.graalvm.polyglot.Context;
+import org.graalvm.polyglot.Value;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Map;
+
+/**
+ * GraalVM JavaScript脚本语言的执行器实现
+ * @author zendwang
+ * @since 2.9.4
+ */
+public class GraalJavaScriptExecutor implements ScriptExecutor {
+
+    private final Logger log = LoggerFactory.getLogger(this.getClass());
+
+    private final Map<String, String> scriptMap = new CopyOnWriteHashMap<>();
+
+    @Override
+    public ScriptExecutor init() {
+        return this;
+    }
+
+    @Override
+    public void load(String nodeId, String script) {
+        try{
+            String wrapScript = StrUtil.format("function process(){{}} process();",script);
+            scriptMap.put(nodeId, wrapScript);
+        }catch (Exception e){
+            String errorMsg = StrUtil.format("script loading error for node[{}], error msg:{}", nodeId, e.getMessage());
+            throw new ScriptLoadException(errorMsg);
+        }
+    }
+
+    @Override
+    public Object execute(ScriptExecuteWrap wrap) throws Exception{
+        try{
+            if (!scriptMap.containsKey(wrap.getNodeId())){
+                String errorMsg = StrUtil.format("script for node[{}] is not loaded", wrap.getNodeId());
+                throw new ScriptLoadException(errorMsg);
+            }
+
+            Context context = Context.newBuilder().allowAllAccess(true).build();
+            Value bindings =  context.getBindings("js");
+            //往脚本语言绑定表里循环增加绑定上下文的key
+            //key的规则为自定义上下文的simpleName
+            //比如你的自定义上下文为AbcContext，那么key就为:abcContext
+            //这里不统一放一个map的原因是考虑到有些用户会调用上下文里的方法，而不是参数，所以脚本语言的绑定表里也是放多个上下文
+            DataBus.getContextBeanList(wrap.getSlotIndex()).forEach(o -> {
+                String key = StrUtil.lowerFirst(o.getClass().getSimpleName());
+                bindings.putMember(key, o);
+            });
+
+            //把wrap对象转换成元数据map
+            Map<String, Object> metaMap = BeanUtil.beanToMap(wrap);
+
+            //在元数据里放入主Chain的流程参数
+            Slot slot = DataBus.getSlot(wrap.getSlotIndex());
+            metaMap.put("requestData", slot.getRequestData());
+
+            //如果有隐式流程，则放入隐式流程的流程参数
+            Object subRequestData = slot.getChainReqData(wrap.getCurrChainName());
+            if (ObjectUtil.isNotNull(subRequestData)){
+                metaMap.put("subRequestData", subRequestData);
+            }
+
+            //往脚本上下文里放入元数据
+            bindings.putMember("_meta", metaMap);
+
+            //放入用户自己定义的bean
+            ScriptBeanManager.getScriptBeanMap().entrySet().stream().forEach( e ->{
+                bindings.putMember(e.getKey(), e.getValue());
+            });
+            Value value = context.eval("js", scriptMap.get(wrap.getNodeId()));
+            if (value.isBoolean()) {
+                return value.asBoolean();
+            } else if (value.isNumber()) {
+                return value.asInt();
+            } else if (value.isString()) {
+                return value.asString();
+            }
+            return value;
+        }catch (Exception e){
+            log.error(e.getMessage(), e);
+            throw e;
+        }
+    }
+
+    @Override
+    public void cleanCache() {
+        scriptMap.clear();
+    }
+}

liteflow-script-plugin/liteflow-script-graaljs/src/main/resources/META-INF/services/com.yomahub.liteflow.script.ScriptExecutor

@@ -0,0 +1,2 @@
+# JavaScript的实现
+com.yomahub.liteflow.script.graaljs.GraalJavaScriptExecutor

liteflow-script-plugin/liteflow-script-javascript/src/main/resources/META-INF/services/com.yomahub.liteflow.script.ScriptExecutor

@@ -1,2 +1,2 @@
 # JavaScript的实现
-com.yomahub.liteflow.script.javascript.JavaScriptExecutor
+com.yomahub.liteflow.script.graaljs.GraalJavaScriptExecutor

liteflow-script-plugin/pom.xml

@@ -18,6 +18,7 @@
         <module>liteflow-script-qlexpress</module>
         <module>liteflow-script-groovy</module>
         <module>liteflow-script-javascript</module>
+        <module>liteflow-script-graaljs</module>
     </modules>
 
 </project>