恢复Advice的懒加载逻辑，修复懒加载所带来的信息污染问题

Author: dongchenxu

sandbox-api/src/main/java/com/alibaba/jvm/sandbox/api/listener/ext/Advice.java

@@ -2,6 +2,7 @@
 
 import com.alibaba.jvm.sandbox.api.event.Event;
 import com.alibaba.jvm.sandbox.api.event.InvokeEvent;
+import com.alibaba.jvm.sandbox.api.util.LazyGet;
 
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -20,7 +21,7 @@ public class Advice implements Attachment {
     private final int invokeId;
 
     private final ClassLoader loader;
-    private final Behavior behavior;
+    private final LazyGet<Behavior> behaviorLazyGet;
     private final Object[] parameterArray;
     private final Object target;
 
@@ -39,20 +40,20 @@ public class Advice implements Attachment {
      *
      * @param processId      {@link InvokeEvent#processId}
      * @param invokeId       {@link InvokeEvent#invokeId}
-     * @param behavior       触发事件的行为
+     * @param behaviorLazyGet 触发事件的行为(懒加载)
      * @param loader         触发事件的行为所在ClassLoader
      * @param parameterArray 触发事件的行为入参
      * @param target         触发事件所归属的对象实例
      */
     Advice(final int processId,
            final int invokeId,
-           final Behavior behavior,
+           final LazyGet<Behavior> behaviorLazyGet,
            final ClassLoader loader,
            final Object[] parameterArray,
            final Object target) {
         this.processId = processId;
         this.invokeId = invokeId;
-        this.behavior = behavior;
+        this.behaviorLazyGet = behaviorLazyGet;
         this.loader = loader;
         this.parameterArray = parameterArray;
         this.target = target;
@@ -140,7 +141,7 @@ public int getInvokeId() {
      * @return 触发事件的行为
      */
     public Behavior getBehavior() {
-        return behavior;
+        return behaviorLazyGet.get();
     }
 
     /**

sandbox-api/src/main/java/com/alibaba/jvm/sandbox/api/listener/ext/AdviceAdapterListener.java

@@ -5,6 +5,7 @@
 import com.alibaba.jvm.sandbox.api.util.BehaviorDescriptor;
 import com.alibaba.jvm.sandbox.api.util.CacheGet;
 import com.alibaba.jvm.sandbox.api.util.GaStringUtils;
+import com.alibaba.jvm.sandbox.api.util.LazyGet;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
@@ -57,11 +58,22 @@ private void switchEvent(final OpStack opStack,
                 final Advice advice = new Advice(
                         bEvent.processId,
                         bEvent.invokeId,
-                        toBehavior(
-                                toClass(loader, bEvent.javaClassName),
-                                bEvent.javaMethodName,
-                                bEvent.javaMethodDesc
-                        ),
+                        new LazyGet<Behavior>() {
+
+                            private final ClassLoader _loader = loader;
+                            private final String _javaClassName = bEvent.javaClassName;
+                            private final String _javaMethodName = bEvent.javaMethodName;
+                            private final String _javaMethodDesc = bEvent.javaMethodDesc;
+
+                            @Override
+                            protected Behavior initialValue() throws Throwable {
+                                return toBehavior(
+                                        toClass(_loader, _javaClassName),
+                                        _javaMethodName,
+                                        _javaMethodDesc
+                                );
+                            }
+                        },
                         loader,
                         bEvent.argumentArray,
                         bEvent.target