ParallelWebappClassLoader (Apache Tomcat 10.1.56 API Documentation)

java.lang.Object
- java.lang.ClassLoader
- - java.security.SecureClassLoader
  - - java.net.URLClassLoader
    - - org.apache.catalina.loader.WebappClassLoaderBase
      - org.apache.catalina.loader.ParallelWebappClassLoader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, Lifecycle, WebappProperties, InstrumentableClassLoader, PermissionCheck
```
public class ParallelWebappClassLoader
extends WebappClassLoaderBase
```
A class loader that is parallel capable. Parallel capable class loaders can load classes concurrently from multiple threads.

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.catalina.loader.WebappClassLoaderBase
  WebappClassLoaderBase.PrivilegedFindClassByName, WebappClassLoaderBase.PrivilegedGetClassLoader, WebappClassLoaderBase.PrivilegedJavaseGetResource
- Nested classes/interfaces inherited from interface org.apache.catalina.Lifecycle
  Lifecycle.SingleUse

Field Summary
- Fields inherited from class org.apache.catalina.loader.WebappClassLoaderBase
  delegate, loaderPC, parent, permissionList, resourceEntries, resources, securityManager, sm
- Fields inherited from interface org.apache.catalina.Lifecycle
  AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT

Constructor Summary

Constructors
Constructor	Description
`ParallelWebappClassLoader()`	Construct a new `ParallelWebappClassLoader` with no parent class loader.
`ParallelWebappClassLoader(java.lang.ClassLoader parent)`	Construct a new `ParallelWebappClassLoader` with the specified parent class loader.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ParallelWebappClassLoader`	`copyWithoutTransformers()`	Returns a copy of this class loader without any class file transformers.

Methods inherited from class org.apache.catalina.loader.WebappClassLoaderBase
addLifecycleListener, addTransformer, addURL, check, checkStateForClassLoading, checkStateForResourceLoading, clearReferences, copyStateWithoutTransformers, destroy, doDefineClass, filter, findClass, findClassInternal, findLifecycleListeners, findLoadedClass0, findResource, findResources, getClearReferencesHttpClientKeepAliveThread, getClearReferencesLogFactoryRelease, getClearReferencesObjectStreamClassCaches, getClearReferencesRmiTargets, getClearReferencesStopThreads, getClearReferencesStopTimerThreads, getClearReferencesThreadLocals, getContextName, getDelegate, getHostName, getJavaseClassLoader, getNotFoundClassResourceCacheSize, getPermissions, getResource, getResourceAsStream, getResources, getServiceName, getSkipMemoryLeakChecksOnJvmShutdown, getState, getStateName, getURLs, getWebappName, hasLoggingConfig, init, isPackageSealed, loadClass, loadClass, modified, refreshPolicy, removeLifecycleListener, removeTransformer, setClearReferencesHttpClientKeepAliveThread, setClearReferencesLogFactoryRelease, setClearReferencesObjectStreamClassCaches, setClearReferencesRmiTargets, setClearReferencesStopThreads, setClearReferencesStopTimerThreads, setClearReferencesThreadLocals, setDelegate, setJavaseClassLoader, setNotFoundClassResourceCacheSize, setResources, setSkipMemoryLeakChecksOnJvmShutdown, start, stop, toString

Methods inherited from class java.net.URLClassLoader
close, definePackage, 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, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - ParallelWebappClassLoader
```
public ParallelWebappClassLoader()
```
    Construct a new ParallelWebappClassLoader with no parent class loader.
  - ParallelWebappClassLoader
```
public ParallelWebappClassLoader(java.lang.ClassLoader parent)
```
    Construct a new ParallelWebappClassLoader with the specified parent class loader.
    
    Parameters:
    
    parent - The parent class loader
- Method Detail
  - copyWithoutTransformers
```
public ParallelWebappClassLoader copyWithoutTransformers()
```
    Description copied from interface: InstrumentableClassLoader
    
    Returns a copy of this class loader without any class file transformers. This is a tool often used by Java Persistence API providers to inspect entity classes in the absence of any instrumentation, something that can't be guaranteed within the context of a ClassFileTransformer's transform method.
    The returned class loader's resource cache will have been cleared so that classes already instrumented will not be retained or returned.
    
    Returns:
    
    the transformer-free copy of this class loader.