javaagents

问题 I'm getting the following error using TomEE and JPA: SEVERE: JAVA AGENT NOT INSTALLED. The JPA Persistence Provider requested installation of a ClassFileTransformer which requires a JavaAgent. See http://openejb.apache.org/3.0/javaagent.html Is having a java agent required for openJPA to function properly? (Specifically is it needed for "openjpa.jdbc.SynchronizeMappings") If so, how do I install it properly in eclipse? 回答1: -javaagent:openejb-javaagent-3.0-beta-2.jar Add that to your VM

问题 Is it possible to add a field in java.util class using byte-buddy? I am trying to add a field in java.util.concurrent.FutureTask and intercept constructor and an arbitrary method to set and get the field value. In short, I am trying to add a field to FutureTask so that I can pass some value to child thread from parent even if they are running in a thread pool. isn't it possible to add a field in FutureTask? FutureTaskTransofrmer @Override protected ElementMatcher.Junction<TypeDescription>

问题 Is it possible to add a field in java.util class using byte-buddy? I am trying to add a field in java.util.concurrent.FutureTask and intercept constructor and an arbitrary method to set and get the field value. In short, I am trying to add a field to FutureTask so that I can pass some value to child thread from parent even if they are running in a thread pool. isn't it possible to add a field in FutureTask? FutureTaskTransofrmer @Override protected ElementMatcher.Junction<TypeDescription>

问题 Is it possible to add a field in java.util class using byte-buddy? I am trying to add a field in java.util.concurrent.FutureTask and intercept constructor and an arbitrary method to set and get the field value. In short, I am trying to add a field to FutureTask so that I can pass some value to child thread from parent even if they are running in a thread pool. isn't it possible to add a field in FutureTask? FutureTaskTransofrmer @Override protected ElementMatcher.Junction<TypeDescription>

问题 Is it possible to add a field in java.util class using byte-buddy? I am trying to add a field in java.util.concurrent.FutureTask and intercept constructor and an arbitrary method to set and get the field value. In short, I am trying to add a field to FutureTask so that I can pass some value to child thread from parent even if they are running in a thread pool. isn't it possible to add a field in FutureTask? FutureTaskTransofrmer @Override protected ElementMatcher.Junction<TypeDescription>

问题 I use jmockit and junit to write unit test for a module and run it in a STB. I use jmockit-1.7 because the STB only have java 5. I got this error when run unit test: java.lang.IllegalStateException: Jmockit has not been initialized. Check that your Java 5 VM has been started with -javaagent:jmockit.jar command line option but my STB use siege java VM, so it doesn't have -javaagent command line option I have google, and found a solution from Running tests with JMockit @BeforeClass public

问题 I use jmockit and junit to write unit test for a module and run it in a STB. I use jmockit-1.7 because the STB only have java 5. I got this error when run unit test: java.lang.IllegalStateException: Jmockit has not been initialized. Check that your Java 5 VM has been started with -javaagent:jmockit.jar command line option but my STB use siege java VM, so it doesn't have -javaagent command line option I have google, and found a solution from Running tests with JMockit @BeforeClass public

问题 // Fixed: This was not an Error because of code. It was because of the IDE. I just tried to make a injection for a game called Minecraft. But i have one Problem. It's not able to load Agent. Here is the Exception: Exception in thread "main" com.sun.tools.attach.AgentLoadException: Agent JAR not found or no Agent-Class attribute at sun.tools.attach.HotSpotVirtualMachine.loadAgent(HotSpotVirtualMachine.java:117) at com.sun.tools.attach.VirtualMachine.loadAgent(VirtualMachine.java:540) at pw

问题 I wrote a javaagent as below to capture the execution time of the execute method of the apache org.apache.http.client.HttpClient . It is capturing the time, but it's running three times. import java.lang.instrument.Instrumentation; import net.bytebuddy.agent.builder.AgentBuilder; import net.bytebuddy.implementation.MethodDelegation; import static net.bytebuddy.matcher.ElementMatchers.isMethod; import static net.bytebuddy.matcher.ElementMatchers.isAbstract; import static net.bytebuddy.matcher

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,