Package com.complexible.common.base

Class Instrumentor

java.lang.Object
com.complexible.common.base.Instrumentor
public final class Instrumentor extends Object

Simple -javaagent compatible instrumentor. Provides a premain implementation which grabs a handle to the JVM Instrumentation and keeps a reference to it for use later on.

Since:
2.0 (0.3.3)
Version:
2.0
Author:
Michael Grove

  • Constructor Details

    • Instrumentor

      public Instrumentor()

  • Method Details

    • instrumentation

      public static Instrumentation instrumentation()
      Return the JVM instrumentation
      Returns:
      the instrumentation or null if this was not used as the java agent

    • premain

      public static void premain(String theAgentArgs, Instrumentation theJVMInst)
      Premain method for use with -javaagent.
      Parameters:
      theAgentArgs - the cmd line args
      theJVMInst - the JVM instrumentation

    • instancesOf

      public static <T> Collection<Class<? extends T>> instancesOf(Class<T> theClass)
      Return all the classes loaded into the JVM which extend from the provided class
      Type Parameters:
      T - the base class type
      Parameters:
      theClass - the class
      Returns:
      all the classes extending from the parameter. An empty collection will be returned if this java agent is not installed

    • annotatedWith

      public static Collection<Class<?>> annotatedWith(Class<? extends Annotation> theAnnotation)
      Return all the classes which have the given annotation applied to them
      Parameters:
      theAnnotation - the annotation
      Returns:
      the classes with the annotation. An empty collection will be returned if this java agent is not installed

    • isInitialized

      public static boolean isInitialized()
      Return whether or not the JVM instrumentation has been initialized via the JVM agent
      Returns:
      true if initialized, false otherwise