byte-buddy

问题 In Java it is possible to create dynamic proxies using an implementation of InvocationHandler . Despite JVM optimizations, using reflection will always have some overhead invoking a method. To try to solve this problem, I tried to use ByteBuddy to create the proxy classes at runtime, but the documentation didn't seem clear enough on this aspect. How do I create a MethodCallProxy in order to forward a method invocation to some class instance? Edit: To better clarify my problem, I am providing

问题 In Java it is possible to create dynamic proxies using an implementation of InvocationHandler . Despite JVM optimizations, using reflection will always have some overhead invoking a method. To try to solve this problem, I tried to use ByteBuddy to create the proxy classes at runtime, but the documentation didn't seem clear enough on this aspect. How do I create a MethodCallProxy in order to forward a method invocation to some class instance? Edit: To better clarify my problem, I am providing

问题 I'm trying to log every call, returned objects and exceptions thrown in methods and constructors using a ByteBuddy (v1.7.9) java agent, without iterfering with the normal functioning of the instrumented code. My current instantiation of the agent is new AgentBuilder.Default() .with(AgentBuilder.Listener.StreamWriting.toSystemOut()) .type((typeDescription, classLoader, module, classBeingRedefined, protectionDomain) -> matcher.matchesIncoming(typeDescription.getTypeName())) .transform((builder,

问题 I need your help in finding what's wrong with my implementation... I'm trying to implement a simple JVM runtime profiler using byte-buddy. In general, what I need is that every method call will be logged in a stack which I manage in a separate object. After reading several posts, I understood that it's better to use the "Advise" approach instead of "MethodDelegation", and here's what I came out with: Agent.java: package com.panaya.java.agent; import net.bytebuddy.agent.builder.AgentBuilder;

问题 I need your help in finding what's wrong with my implementation... I'm trying to implement a simple JVM runtime profiler using byte-buddy. In general, what I need is that every method call will be logged in a stack which I manage in a separate object. After reading several posts, I understood that it's better to use the "Advise" approach instead of "MethodDelegation", and here's what I came out with: Agent.java: package com.panaya.java.agent; import net.bytebuddy.agent.builder.AgentBuilder;

问题 I have a project where I was using Javassist to log outgoing method/constructor calls with code like this: CtMethod cm = ... ; cm.instrument( new ExprEditor() { public void edit(MethodCall m) throws CannotCompileException { if (m.getClassName().equals("Point") && m.getMethodName().equals("move")) m.replace("{ $1 = 0; $_ = $proceed($$); }"); } }); which assigns '0' to the first argument of the called method and then proceeds with the original call, that is, if cm represents the method

问题 I have a code for Thread Pool example as follows public class RunThreads{ static final int MAX_TASK = 3; public static void main(String[] args) { Runnable r1 = new Task("task 1"); Runnable r2 = new Task("task 2"); Runnable r3 = new Task("task 3"); Runnable r4 = new Task("task 4"); Runnable r5 = new Task("task 5"); ExecutorService pool = Executors.newFixedThreadPool(MAX_TASK); pool.execute(r1); pool.execute(r2); pool.execute(r3); pool.execute(r4); pool.execute(r5); pool.shutdown(); }} and

问题 I am trying to create a setter and a getter for a field using Byte Buddy. public class Sample { public static void main(String[] args) throws InstantiationException, IllegalAccessException, NoSuchFieldException, SecurityException, NoSuchMethodException { Class<?> type = new ByteBuddy() .subclass(Object.class) .name("domain") .defineField("id", int.class, Visibility.PRIVATE) .defineMethod("getId", int.class, Visibility.PUBLIC).intercept(FieldAccessor.ofBeanProperty()) .make() .load(Sample

问题 I'm adding new locals via newLocal from LocalVariableSorter . The method I'm adding the locals to is an instance method with a long parameter. I'm adding two locals; one long, one object. There are no other local vars in the sample code. As a result I would have expected the following slots / indexes: 0 - this 1 - the long param 3 - my 1st local added via `newLocal` - using two slots as it is a long 5 - my 2nd local added via `newLocal` What I do get as return from newLocal is 3 and 7 though.

问题 I am seeing Cannot resolve type description errors when trying to load classes instrumented using Byte Buddy v1.9.11 within Mule 4 (JDK 1.8). Is there a known issue with Byte Buddy, or a particular combination of isolated classloader Mule 4 is using with Byte Buddy instrumented classes? Any suggestions are appreciated. I am using Elastic Java APM agent to instrument Mule 4 with its over-complicated classloader isolation mechanism that seems to interfere with Byte Buddy v1.9.11 used by the APM