Qlexpress

core/pom.xml

@@ -211,6 +211,10 @@
             <groupId>ognl</groupId>
             <artifactId>ognl</artifactId>
         </dependency>
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>QLExpress4</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.junit.vintage</groupId>
             <artifactId>junit-vintage-engine</artifactId>
@@ -263,6 +267,10 @@
             <scope>provided</scope>
             <optional>true</optional>
         </dependency>
+        <dependency>
+            <groupId>ognl</groupId>
+            <artifactId>ognl</artifactId>
+        </dependency>
     </dependencies>
 
 </project>

core/src/main/java/com/taobao/arthas/core/GlobalOptions.java

@@ -142,6 +142,26 @@ public class GlobalOptions {
             description = STRICT_MESSAGE
     )
     public static volatile boolean strict = true;
+    /**
+     * 是否切换使用表达式ognl/qlexpress开关
+     */
+    @Option(level = 1,
+            name = "express-type",
+            summary = "Option to use ognl/qlexpress",
+            description = "Option to use ognl/qlexpress in commands, default ognl, can change to qlexpress"
+    )
+    public static volatile String ExpressType = "ognl";
+
+
+    /**
+     * qlexpress使用参数
+     */
+    @Option(level = 1,
+            name = "qlexpress-config",
+            summary = "config init when use qlexpress, with json-simple, for example: {\"precise\": true }",
+            description = ""
+    )
+    public static volatile String QLExpressConfig = "";
 
     public static void updateOnglStrict(boolean strict) {
         try {

core/src/main/java/com/taobao/arthas/core/command/express/ExpressFactory.java

@@ -1,29 +1,42 @@
 package com.taobao.arthas.core.command.express;
 
+import com.taobao.arthas.core.GlobalOptions;
+import com.taobao.arthas.core.command.model.ExpressTypeEnum;
+
+
 /**
  * ExpressFactory
  * @author ralf0131 2017-01-04 14:40.
  * @author hengyunabc 2018-10-08
  */
 public class ExpressFactory {
 
-    private static final ThreadLocal<Express> expressRef = new ThreadLocal<Express>() {
-        @Override
-        protected Express initialValue() {
-            return new OgnlExpress();
-        }
-    };
+    private static final ThreadLocal<Express> expressRef = ThreadLocal.withInitial(() -> new OgnlExpress());
+    private static final ThreadLocal<Express> expressRefQLExpress = ThreadLocal.withInitial(() -> new QLExpress());
 
     /**
      * get ThreadLocal Express Object
      * @param object
      * @return
      */
     public static Express threadLocalExpress(Object object) {
+        if (GlobalOptions.ExpressType.equals(ExpressTypeEnum.QLEXPRESS.getExpressType())) {
+            return expressRefQLExpress.get().reset().bind(object);
+        }
         return expressRef.get().reset().bind(object);
     }
 
     public static Express unpooledExpress(ClassLoader classloader) {
+        if (classloader == null) {
+            classloader = ClassLoader.getSystemClassLoader();
+        }
+        if (GlobalOptions.ExpressType.equals(ExpressTypeEnum.QLEXPRESS.getExpressType())) {
+            return new QLExpress(new QLExpressClassLoaderClassResolver(classloader));
+        }
+        return new OgnlExpress(new ClassLoaderClassResolver(classloader));
+    }
+
+    public static Express unpooledExpressByOGNL(ClassLoader classloader) {
         if (classloader == null) {
             classloader = ClassLoader.getSystemClassLoader();
         }

core/src/main/java/com/taobao/arthas/core/command/express/QLExpress.java

@@ -0,0 +1,109 @@
+package com.taobao.arthas.core.command.express;
+
+import com.alibaba.arthas.deps.org.slf4j.Logger;
+import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
+import com.alibaba.fastjson2.JSON;
+import com.alibaba.qlexpress4.ClassSupplier;
+import com.alibaba.qlexpress4.Express4Runner;
+import com.alibaba.qlexpress4.InitOptions;
+import com.alibaba.qlexpress4.QLOptions;
+import com.alibaba.qlexpress4.runtime.ReflectLoader;
+import com.alibaba.qlexpress4.security.QLSecurityStrategy;
+import com.taobao.arthas.core.GlobalOptions;
+import com.taobao.arthas.core.command.model.QLExpressConfigModel;
+
+
+/**
+ * @Author TaoKan
+ * @Date 2024/9/17 6:01 PM
+ */
+public class QLExpress implements Express {
+    private static final Logger logger = LoggerFactory.getLogger(QLExpress.class);
+    private Express4Runner expressRunner;
+    private QLGlobalContext qlGlobalContext;
+
+    private QLOptions qlOptions;
+
+    private InitOptions initOptions;
+
+    public QLExpress() {
+        this(QLExpressCustomClassResolver.customClassResolver);
+    }
+
+    public QLExpress(ClassSupplier classResolver) {
+        initQLExpress(classResolver);
+        initConfig();
+        initContext();
+    }
+
+    private void initConfig() {
+        try {
+            if (GlobalOptions.QLExpressConfig.length() > 0) {
+                QLOptions.Builder qlOptionsBuilder = QLOptions.builder();
+                QLExpressConfigModel qlExpressConfigModel = JSON.parseObject(GlobalOptions.QLExpressConfig, QLExpressConfigModel.class);
+                qlOptionsBuilder.cache(qlExpressConfigModel.isCache());
+                qlOptionsBuilder.avoidNullPointer(qlExpressConfigModel.isAvoidNullPointer());
+                qlOptionsBuilder.maxArrLength(qlExpressConfigModel.getMaxArrLength());
+                qlOptionsBuilder.polluteUserContext(qlExpressConfigModel.isPolluteUserContext());
+                qlOptionsBuilder.precise(qlExpressConfigModel.isPrecise());
+                qlOptionsBuilder.timeoutMillis(qlExpressConfigModel.getTimeoutMillis());
+                qlOptions = qlOptionsBuilder.build();
+            }else {
+                qlOptions = QLOptions.DEFAULT_OPTIONS;
+            }
+            //4.0设置InitOptions
+        }catch (Throwable t){
+            //异常不设置options
+            logger.error("Error Init Options For QLExpress:", t);
+        }
+    }
+
+    private void initQLExpress(ClassSupplier classResolver) {
+        InitOptions.Builder initOptionsBuilder = InitOptions.builder();
+        initOptionsBuilder.securityStrategy(QLSecurityStrategy.open());
+        initOptionsBuilder.allowPrivateAccess(true);
+        initOptionsBuilder.classSupplier(classResolver);
+        initOptions = initOptionsBuilder.build();
+        expressRunner = QLExpressRunner.getInstance(initOptions);
+    }
+
+    private void initContext() {
+        ReflectLoader reflectLoader = new ReflectLoader(initOptions.getSecurityStrategy(), initOptions.getExtensionFunctions(), initOptions.isAllowPrivateAccess());
+        qlGlobalContext = new QLGlobalContext(reflectLoader);
+    }
+
+    @Override
+    public Object get(String express) throws ExpressException {
+        try {
+            Object result = expressRunner.execute(express, qlGlobalContext, qlOptions);
+            return result;
+        } catch (Exception e) {
+            logger.error("Error during evaluating the expression with QLExpress:", e);
+            throw new ExpressException(express, e);
+        }
+    }
+
+    @Override
+    public boolean is(String express) throws ExpressException {
+        final Object ret = get(express);
+        return ret instanceof Boolean && (Boolean) ret;
+    }
+
+    @Override
+    public Express bind(Object object) {
+        qlGlobalContext.bindObj(object);
+        return this;
+    }
+
+    @Override
+    public Express bind(String name, Object value) {
+        qlGlobalContext.put(name, value);
+        return this;
+    }
+
+    @Override
+    public Express reset() {
+        qlGlobalContext.clear();
+        return this;
+    }
+}

core/src/main/java/com/taobao/arthas/core/command/express/QLExpressClassLoaderClassResolver.java

@@ -0,0 +1,40 @@
+package com.taobao.arthas.core.command.express;
+
+import com.alibaba.qlexpress4.ClassSupplier;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * @Author TaoKan
+ * @Date 2024/12/1 7:07 PM
+ */
+public class QLExpressClassLoaderClassResolver implements ClassSupplier {
+
+    private ClassLoader classLoader;
+
+    private final Map<String, Optional<Class<?>>> cache = new ConcurrentHashMap<>();
+
+    public QLExpressClassLoaderClassResolver(ClassLoader classLoader) {
+        this.classLoader = classLoader;
+    }
+
+    private Optional<Class<?>> loadClsInner(String clsQualifiedName) {
+        try {
+            Class<?> aClass = null;
+            if (classLoader != null) {
+                aClass = classLoader.loadClass(clsQualifiedName);
+            }else {
+                aClass = Class.forName(clsQualifiedName);
+            }
+            return Optional.of(aClass);
+        } catch (ClassNotFoundException | NoClassDefFoundError e) {
+            return Optional.empty();
+        }
+    }
+    @Override
+    public Class<?> loadCls(String className) {
+        Optional<Class<?>> clsOp = cache.computeIfAbsent(className, this::loadClsInner);
+        return clsOp.orElse(null);
+    }
+}

core/src/main/java/com/taobao/arthas/core/command/express/QLExpressCustomClassResolver.java

@@ -0,0 +1,44 @@
+package com.taobao.arthas.core.command.express;
+
+import com.alibaba.arthas.deps.org.slf4j.Logger;
+import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
+import com.alibaba.qlexpress4.ClassSupplier;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * @Author TaoKan
+ * @Date 2024/12/1 7:06 PM
+ */
+public class QLExpressCustomClassResolver implements ClassSupplier {
+
+    public static final QLExpressCustomClassResolver customClassResolver = new QLExpressCustomClassResolver();
+
+    private final Map<String, Optional<Class<?>>> cache = new ConcurrentHashMap<>();
+
+    private QLExpressCustomClassResolver() {
+
+    }
+
+    private Optional<Class<?>> loadClsInner(String clsQualifiedName) {
+        try {
+            ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+            Class<?> aClass = null;
+            if (classLoader != null) {
+                aClass = classLoader.loadClass(clsQualifiedName);
+            } else {
+                aClass = Class.forName(clsQualifiedName);
+            }
+            return Optional.of(aClass);
+        } catch (ClassNotFoundException | NoClassDefFoundError e) {
+            return Optional.empty();
+        }
+    }
+    @Override
+    public Class<?> loadCls(String clsQualifiedName) {
+        Optional<Class<?>> clsOp = cache.computeIfAbsent(clsQualifiedName, this::loadClsInner);
+        return clsOp.orElse(null);
+    }
+
+}

core/src/main/java/com/taobao/arthas/core/command/express/QLExpressRunner.java

@@ -0,0 +1,34 @@
+package com.taobao.arthas.core.command.express;
+
+
+import com.alibaba.qlexpress4.Express4Runner;
+import com.alibaba.qlexpress4.InitOptions;
+
+/**
+ * @Author TaoKan
+ * @Date 2024/9/22 12:20 PM
+ */
+public class QLExpressRunner {
+    private volatile static QLExpressRunner instance = null;
+    private Express4Runner expressRunner;
+
+    private QLExpressRunner(InitOptions initOptions){
+        expressRunner = new Express4Runner(initOptions);
+    }
+
+    //对外提供静态方法获取对象
+    public static Express4Runner getInstance(InitOptions initOptions){
+        //第一次判断,如果instance不为null,不进入抢锁阶段,直接返回实例
+        if(instance == null){
+            synchronized (QLExpressRunner.class){
+                //抢到锁之后再次进行判断是否为null
+                if(instance == null){
+                    instance = new QLExpressRunner(initOptions);
+                }
+            }
+        }
+        return instance.expressRunner;
+    }
+
+
+}

core/src/main/java/com/taobao/arthas/core/command/express/QLGlobalContext.java

@@ -0,0 +1,70 @@
+package com.taobao.arthas.core.command.express;
+
+import com.alibaba.arthas.deps.org.slf4j.Logger;
+import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
+import com.alibaba.fastjson2.JSON;
+import com.alibaba.qlexpress4.exception.PureErrReporter;
+import com.alibaba.qlexpress4.runtime.ReflectLoader;
+import com.alibaba.qlexpress4.runtime.Value;
+import com.alibaba.qlexpress4.runtime.context.ExpressContext;
+import com.alibaba.qlexpress4.runtime.data.MapItemValue;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * @Author TaoKan
+ * @Date 2024/9/22 12:39 PM
+ */
+public class QLGlobalContext implements ExpressContext {
+    private static final Logger logger = LoggerFactory.getLogger(QLGlobalContext.class);
+
+    private Map<String, Object> context;
+    private Object object;
+    private ReflectLoader reflectLoader;
+
+    public QLGlobalContext(ReflectLoader reflectLoader) {
+        this.context = new ConcurrentHashMap<>();
+        this.reflectLoader = reflectLoader;
+    }
+
+    public void put(String name, Object value){
+        context.put(name, value);
+    }
+
+    public void clear() {
+        context.clear();
+        this.context.put("reflectLoader",reflectLoader);
+    }
+
+    public void bindObj(Object object) {
+        this.object = object;
+        context.put("object",object);
+    }
+    @Override
+    public Value get(Map<String, Object> attachments, String variableName) {
+        if ((this.reflectLoader != null) && (this.object != null) && !variableName.startsWith("#")) {
+            return this.reflectLoader.loadField(this.object, variableName, true, PureErrReporter.INSTANCE);
+        }
+        String newVariableName = variableName.replace("#","");
+        return new MapItemValue(this.context, newVariableName);
+    }
+
+
+    public Map<String, Object> getContext() {
+        return context;
+    }
+
+    public void setContext(Map<String, Object> context) {
+        this.context = context;
+    }
+
+    public Object getObject() {
+        return object;
+    }
+
+    public void setObject(Object object) {
+        this.object = object;
+    }
+
+}