Package io.opentelemetry.javaagent.bootstrap

Class AgentClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

io.opentelemetry.javaagent.bootstrap.AgentClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

public class AgentClassLoader
extends URLClassLoader

Classloader used to run the core agent.

It is built around the concept of a jar inside another jar. This classloader loads the files of the internal jar to load classes and resources.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AgentClassLoader.BootstrapClassLoaderProxy	A stand-in for the bootstrap classloader.

Constructor Summary

Constructors

Constructor	Description
AgentClassLoader(File javaagentFile, String internalJarFileName, ClassLoader parent)	Construct a new AgentClassLoader.

Method Summary

Modifier and Type	Method	Description
protected Class<?>	findClass(String name)
URL	findResource(String name)
Enumeration<URL>	findResources(String name)
AgentClassLoader.BootstrapClassLoaderProxy	getBootstrapProxy()
protected String	getClassSuffix()
URL	getResource(String resourceName)
Class<?>	loadClass(String name, boolean resolve)

Methods inherited from class java.net.URLClassLoader

addURL, close, definePackage, getPermissions, getResourceAsStream, getURLs, newInstance, newInstance

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findSystemClass, getClassLoadingLock, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, loadClass, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Constructor Detail

AgentClassLoader

public AgentClassLoader(File javaagentFile,
                        String internalJarFileName,
                        ClassLoader parent)

Construct a new AgentClassLoader.

Parameters:

javaagentFile - Used for resource lookups.

internalJarFileName - File name of the internal jar

parent - Classloader parent. Should null (bootstrap), or the platform classloader for java

Method Detail

loadClass

public Class<?> loadClass(String name,
                          boolean resolve)
                   throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

findClass

protected Class<?> findClass(String name)
                      throws ClassNotFoundException

Overrides:

findClass in class URLClassLoader

Throws:

ClassNotFoundException

getClassSuffix

protected String getClassSuffix()

getResource

public URL getResource(String resourceName)

Overrides:

getResource in class ClassLoader

findResource

public URL findResource(String name)

Overrides:

findResource in class URLClassLoader

findResources

public Enumeration<URL> findResources(String name)
                               throws IOException

Overrides:

findResources in class URLClassLoader

Throws:

IOException

getBootstrapProxy

public AgentClassLoader.BootstrapClassLoaderProxy getBootstrapProxy()