Class Attacher


  • public class Attacher
    extends java.lang.Object
    A Java program that attaches a Java agent to an external process.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      static java.lang.String DUMP_PROPERTY
      Indicates that any error during attachment should be dumped to a given file location.
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private Attacher()
      The attacher provides only static utility methods and should not be instantiated.
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      protected static void install​(java.lang.Class<?> virtualMachineType, java.lang.String processId, java.lang.String agent, boolean isNative, java.lang.String argument)
      Installs a Java agent on a target VM.
      static void main​(java.lang.String[] args)
      Runs the attacher as a Java application.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • DUMP_PROPERTY

        public static final java.lang.String DUMP_PROPERTY
        Indicates that any error during attachment should be dumped to a given file location.
        See Also:
        Constant Field Values
    • Constructor Detail

      • Attacher

        private Attacher()
        The attacher provides only static utility methods and should not be instantiated.
    • Method Detail

      • main

        public static void main​(java.lang.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​(java.lang.Class<?> virtualMachineType,
                                      java.lang.String processId,
                                      java.lang.String agent,
                                      boolean isNative,
                                      @MaybeNull
                                      java.lang.String argument)
                               throws java.lang.NoSuchMethodException,
                                      java.lang.reflect.InvocationTargetException,
                                      java.lang.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:
        java.lang.NoSuchMethodException - If the virtual machine type does not define an expected method.
        java.lang.reflect.InvocationTargetException - If the virtual machine type raises an error.
        java.lang.IllegalAccessException - If a method of the virtual machine type cannot be accessed.