How to use loadAgentPath method of com.sun.tools.attach.VirtualMachine class

Best Powermock code snippet using com.sun.tools.attach.VirtualMachine.loadAgentPath

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...30 * <p> This exception is thrown by31 * {@link com.sun.tools.attach.VirtualMachine#loadAgent VirtualMachine.loadAgent},32 * {@link com.sun.tools.attach.VirtualMachine#loadAgentLibrary33 * VirtualMachine.loadAgentLibrary},34 * {@link com.sun.tools.attach.VirtualMachine#loadAgentPath VirtualMachine.loadAgentPath}35 * methods if an agent, or agent library, cannot be initialized.36 * When thrown by {@code VirtualMachine.loadAgentLibrary}, or37 * {@code VirtualMachine.loadAgentPath} then the exception encapsulates38 * the error returned by the agent's {@code Agent_OnAttach} function.39 * This error code can be obtained by invoking the {@link #returnValue() returnValue} method.40 */​41public class AgentInitializationException extends Exception {42 /​** use serialVersionUID for interoperability */​43 static final long serialVersionUID = -1508756333332806353L;44 private int returnValue;45 /​**46 * Constructs an {@code AgentInitializationException} with47 * no detail message.48 */​49 public AgentInitializationException() {50 super();51 this.returnValue = 0;...

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loadAgentPath

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1import java.io.File;2import java.lang.management.ManagementFactory;3import java.util.Arrays;4import java.util.Optional;5import com.sun.tools.attach.VirtualMachine;6import com.sun.tools.attach.VirtualMachineDescriptor;7public class LoadAgentPath {8 public static void main(String[] args) throws Exception {9 String pid = ManagementFactory.getRuntimeMXBean().getName().split("@")[0];10 VirtualMachine vm = VirtualMachine.attach(pid);11 String agentJarPath = new File("agent.jar").getAbsolutePath();12 vm.loadAgentPath(agentJarPath, "loadAgentPath");13 vm.detach();14 }15}16public class Agent {17 public static void agentmain(String agentArgs, java.lang.instrument.Instrumentation inst) {18 System.out.println("Agent Loaded. agentArgs = " + agentArgs);19 System.out.println("Instrumentation = " + inst);20 }21}22public abstract void loadAgent(String agentJarPath, String agentArgs) throws IOException;23import java.io.File;24import java.lang.management.ManagementFactory;25import java.util.Arrays;26import java.util.Optional;27import com.sun.tools.attach.VirtualMachine;28import com.sun.tools.attach.VirtualMachineDescriptor;29public class LoadAgent {30 public static void main(String[] args) throws Exception {31 String pid = ManagementFactory.getRuntimeMXBean().getName().split("@")[0];

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loadAgentPath

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1import com.sun.tools.attach.VirtualMachine;2import java.io.IOException;3import java.util.List;4import java.util.ArrayList;5import java.util.Arrays;6public class LoadAgent {7 public static void main(String[] args) {8 try {9 List<String> argsList = new ArrayList<>(Arrays.asList(args));10 String pid = argsList.get(0);11 argsList.remove(0);12 String agentPath = argsList.get(0);13 argsList.remove(0);14 String agentArgs = String.join(",", argsList);15 System.out.printf("Loading agent %s with args %s into process %s", agentPath, agentArgs, pid);16 VirtualMachine vm = VirtualMachine.attach(pid);17 vm.loadAgent(agentPath, agentArgs);18 vm.detach();19 } catch (IOException e) {20 e.printStackTrace();21 }22 }23}

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loadAgentPath

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1import java.io.File;2import java.io.IOException;3import java.lang.management.ManagementFactory;4import java.util.Scanner;5import java.util.concurrent.TimeUnit;6import java.util.stream.Stream;7import com.sun.tools.attach.VirtualMachine;8import com.sun.tools.attach.VirtualMachineDescriptor;9public class AgentLoader {10 private static final String AGENT_JAR = "agent.jar";11 private static final String AGENT_CLASS = "com.example.agent.AgentMain";12 public static void main(String[] args) throws Exception {13 String pid = args.length > 0 ? args[0] : getPid();14 VirtualMachine vm = VirtualMachine.attach(pid);15 try {16 vm.loadAgent(new File(AGENT_JAR).getAbsolutePath(), AGENT_CLASS);17 } finally {18 vm.detach();19 }20 }21 private static String getPid() {22 String name = ManagementFactory.getRuntimeMXBean().getName();23 int i = name.indexOf('@');24 if (i > 0) {25 try {26 return name.substring(0, i);27 } catch (NumberFormatException e) {28 }29 }30 throw new IllegalStateException("Cannot get PID");31 }32}

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loadAgentPath

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1import java.io.*;2import com.sun.tools.attach.*;3public class AgentLoader {4 public static void main(String[] args) throws Exception {5 String pid = args[0];6 String agent = args[1];7 VirtualMachine vm = VirtualMachine.attach(pid);8 vm.loadAgentPath(agent, "test");9 vm.detach();10 }11}

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loadAgentPath

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1import java.io.*;2import java.lang.management.*;3import java.lang.reflect.*;4import java.util.*;5import javax.management.*;6import com.sun.tools.attach.*;7public class JMXTest {8 private static final String AGENT_PATH = "target/​agent.jar";9 private static final String AGENT_CLASS = "com.example.agent.Agent";10 private static final String MBEAN_CLASS = "com.example.mbean.MBean";11 private static final String MBEAN_NAME = "com.example.mbean:type=MBean";12 public static void main(String[] args) throws Exception {13 String pid = args[0];14 String method = args[1];15 String[] params = Arrays.copyOfRange(args, 2, args.length);16 VirtualMachine vm = VirtualMachine.attach(pid);17 vm.loadAgentPath(AGENT_PATH, null);18 Class<?> vmClass = Class.forName("sun.management.VMManagement");19 Method getMBeanServerMethod = vmClass.getDeclaredMethod("getMBeanServer");20 MBeanServer mbs = (MBeanServer) getMBeanServerMethod.invoke(null);21 ObjectName mbeanName = new ObjectName(MBEAN_NAME);22 mbs.createMBean(MBEAN_CLASS, mbeanName);23 mbs.invoke(mbeanName, method, params, null);24 mbs.invoke(mbeanName, method, params, null);25 }26}27package com.example.agent;28import java.lang.management.*;29import java.lang.reflect.*;30import java.util.*;31import java.util.concurrent.*;32import javax.management.*;33import javax.management.openmbean.*;34import javax.management.remote.*;35import javax.management.remote.rmi.*;36import javax.rmi.ssl.*;37import sun.management.*;38import com.sun.management.*;39public class Agent {

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