Class Attacher

java.lang.Object

net.bytebuddy.agent.Attacher

public class Attacher
extends Object

A Java program that attaches a Java agent to an external process.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DUMP_PROPERTY	Indicates that any error during attachment should be dumped to a given file location.

Method Summary

Modifier and Type	Method	Description
protected static void	install(Class<?> virtualMachineType, String processId, String agent, boolean isNative, String argument)	Installs a Java agent on a target VM.
static void	main(String[] args)	Runs the attacher as a Java application.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

DUMP_PROPERTY

public static final String DUMP_PROPERTY

Indicates that any error during attachment should be dumped to a given file location.

See Also:

• Constant Field Values

Method Details

main

public static void main(String[] args)

Runs the attacher as a Java application.

Parameters:

args - A list containing the fully qualified name of the virtual machine type, the process id, the fully qualified name of the Java agent jar followed by an empty string if the argument to the agent is null or any number of strings where the first argument is proceeded by any single character which is stripped off.

install

protected static void install(Class<?> virtualMachineType,
 String processId,
 String agent,
 boolean isNative,
 @MaybeNull
 String argument)
                       throws NoSuchMethodException,
InvocationTargetException,
IllegalAccessException

Installs a Java agent on a target VM.

Parameters:

virtualMachineType - The virtual machine type to use for the external attachment.

processId - The id of the process being target of the external attachment.

agent - The Java agent to attach.

isNative - true if the agent is native.

argument - The argument to provide or null if no argument is provided.

Throws:

NoSuchMethodException - If the virtual machine type does not define an expected method.

InvocationTargetException - If the virtual machine type raises an error.

IllegalAccessException - If a method of the virtual machine type cannot be accessed.