WebappClassLoaderBase (Apache Tomcat 8.0.15 API Documentation)

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

All Implemented Interfaces:

Closeable, AutoCloseable, Lifecycle, WebappProperties, InstrumentableClassLoader

Direct Known Subclasses:

ParallelWebappClassLoader, WebappClassLoader
```
public abstract class WebappClassLoaderBase
extends URLClassLoader
implements Lifecycle, InstrumentableClassLoader, WebappProperties
```
Specialized web application class loader.
This class loader is a full reimplementation of the URLClassLoader from the JDK. It is designed to be fully compatible with a normal URLClassLoader, although its internal behavior may be completely different.
IMPLEMENTATION NOTE - By default, this class loader follows the delegation model required by the specification. The system class loader will be queried first, then the local repositories, and only then delegation to the parent class loader will occur. This allows the web application to override any shared class except the classes from J2SE. Special handling is provided from the JAXP XML parser interfaces, the JNDI interfaces, and the classes from the servlet API, which are never loaded from the webapp repositories. The delegate property allows an application to modify this behavior to move the parent class loader ahead of the local repositories.
IMPLEMENTATION NOTE - Due to limitations in Jasper compilation technology, any repository which contains classes from the servlet API will be ignored by the class loader.
IMPLEMENTATION NOTE - The class loader generates source URLs which include the full JAR URL when a class is loaded from a JAR file, which allows setting security permission at the class level, even when a class is contained inside a JAR.
IMPLEMENTATION NOTE - Local repositories are searched in the order they are added via the initial constructor and/or any subsequent calls to addRepository() or addJar().
IMPLEMENTATION NOTE - No check for sealing violations or security is made unless a security manager is present.
IMPLEMENTATION NOTE - As of 8.0, this class loader implements InstrumentableClassLoader, permitting web application classes to instrument other classes in the same web application. It does not permit instrumentation of system or container classes or classes in other web apps.

Author:

Remy Maucherat, Craig R. McClanahan

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`protected class`	`WebappClassLoaderBase.PrivilegedFindResourceByName`
`protected static class`	`WebappClassLoaderBase.PrivilegedGetClassLoader`

Field Summary

Fields
Modifier and Type	Field and Description
`protected Permission`	`allPermission` All permission.
`protected boolean`	`delegate` Should this class loader delegate to the parent class loader before searching its own repositories (i.e. the usual Java2 delegation model)?
`protected HashMap<String,PermissionCollection>`	`loaderPC` The PermissionCollection for each CodeSource for a web application context.
`protected boolean`	`needConvert` need conversion for properties files
`protected Matcher`	`packageTriggersDeny` Regular expression of package names which are not allowed to be loaded from a webapp class loader without delegating first.
`protected Matcher`	`packageTriggersPermit` Regular expression of package names which are allowed to be loaded from a webapp class loader without delegating first and override any set by `packageTriggersDeny`.
`protected ClassLoader`	`parent` The parent class loader.
`protected ArrayList<Permission>`	`permissionList` A list of read File and Jndi Permission's required if this loader is for a web application context.
`protected Map<String,ResourceEntry>`	`resourceEntries` The cache of ResourceEntry for classes and resources we have loaded, keyed by resource path, not binary name.
`protected WebResourceRoot`	`resources` Associated web resources for this webapp.
`protected SecurityManager`	`securityManager` Instance of the SecurityManager installed.
`protected static StringManager`	`sm` The string manager for this package.

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
Modifier	Constructor and Description
`protected`	`WebappClassLoaderBase()` Construct a new ClassLoader with no defined repositories and no parent ClassLoader.
`protected`	`WebappClassLoaderBase(ClassLoader parent)` Construct a new ClassLoader with no defined repositories and the given parent ClassLoader.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addLifecycleListener(LifecycleListener listener)` Add a lifecycle event listener to this component.
`void`	`addTransformer(ClassFileTransformer transformer)` Adds the specified class file transformer to this class loader.
`protected void`	`addURL(URL url)`
`protected void`	`checkStateForClassLoading(String className)`
`protected void`	`clearReferences()` Clear references.
`protected void`	`copyStateWithoutTransformers(WebappClassLoaderBase base)`
`void`	`destroy()` Prepare to discard the object.
`protected Class<?>`	`doDefineClass(String name, byte[] b, int off, int len, ProtectionDomain protectionDomain)` Expose this method for use by the unit tests.
`protected boolean`	`filter(String name)` Filter classes.
`Class<?>`	`findClass(String name)` Find the specified class in our local repositories, if possible.
`protected Class<?>`	`findClassInternal(String name)` Find specified class in local repositories.
`LifecycleListener[]`	`findLifecycleListeners()` Get the lifecycle listeners associated with this lifecycle.
`protected Class<?>`	`findLoadedClass0(String name)` Finds the class with the given name if it has previously been loaded and cached by this class loader, and return the Class object.
`protected InputStream`	`findLoadedResource(String name)` Finds the resource with the given name if it has previously been loaded and cached by this class loader, and return an input stream to the resource data.
`URL`	`findResource(String name)` Find the specified resource in our local repository, and return a `URL` referring to it, or `null` if this resource cannot be found.
`protected ResourceEntry`	`findResourceInternal(String name, String path)` Find specified resource in local repositories.
`Enumeration<URL>`	`findResources(String name)` Return an enumeration of `URLs` representing all of the resources with the given name.
`boolean`	`getClearReferencesHttpClientKeepAliveThread()` Return the clearReferencesHttpClientKeepAliveThread flag for this Context.
`boolean`	`getClearReferencesLogFactoryRelease()` Return the clearReferencesLogFactoryRelease flag for this Context.
`boolean`	`getClearReferencesStatic()` Return the clearReferencesStatic flag for this Context.
`boolean`	`getClearReferencesStopThreads()` Return the clearReferencesStopThreads flag for this Context.
`boolean`	`getClearReferencesStopTimerThreads()` Return the clearReferencesStopTimerThreads flag for this Context.
`String`	`getContextName()` Return the context name for this class loader.
`boolean`	`getDelegate()` Return the "delegate first" flag for this class loader.
`String`	`getHostName()` Returns a name for the Host where the web application is deployed or null if none is available.
`protected ClassLoader`	`getJavaseClassLoader()`
`protected PermissionCollection`	`getPermissions(CodeSource codeSource)` Get the Permissions for a CodeSource.
`URL`	`getResource(String name)` Find the resource with the given name.
`InputStream`	`getResourceAsStream(String name)` Find the resource with the given name, and return an input stream that can be used for reading it.
`WebResourceRoot`	`getResources()` Get associated resources.
`String`	`getServiceName()` Returns a name for the service where the Host is deployed or null if none is available.
`LifecycleState`	`getState()` Obtain the current state of the source component.
`String`	`getStateName()` Obtain a textual representation of the current component state.
`URL[]`	`getURLs()` Note that list of URLs returned by this method may not be complete.
`String`	`getWebappName()` Returns a name for the web application or null if none is available.
`void`	`init()` Prepare the component for starting.
`protected boolean`	`isPackageSealed(String name, Manifest man)` Returns true if the specified package name is sealed according to the given manifest.
`Class<?>`	`loadClass(String name)` Load the class with the specified name.
`Class<?>`	`loadClass(String name, boolean resolve)` Load the class with the specified name, searching using the following algorithm until it finds and returns the class.
`boolean`	`modified()` Have one or more classes or resources been modified so that a reload is appropriate?
`protected void`	`refreshPolicy()` Refresh the system policy file, to pick up eventual changes.
`void`	`removeLifecycleListener(LifecycleListener listener)` Remove a lifecycle event listener from this component.
`void`	`removeTransformer(ClassFileTransformer transformer)` Removes the specified class file transformer from this class loader.
`void`	`setClearReferencesHttpClientKeepAliveThread(boolean clearReferencesHttpClientKeepAliveThread)` Set the clearReferencesHttpClientKeepAliveThread feature for this Context.
`void`	`setClearReferencesLogFactoryRelease(boolean clearReferencesLogFactoryRelease)` Set the clearReferencesLogFactoryRelease feature for this Context.
`void`	`setClearReferencesStatic(boolean clearReferencesStatic)` Set the clearReferencesStatic feature for this Context.
`void`	`setClearReferencesStopThreads(boolean clearReferencesStopThreads)` Set the clearReferencesStopThreads feature for this Context.
`void`	`setClearReferencesStopTimerThreads(boolean clearReferencesStopTimerThreads)` Set the clearReferencesStopTimerThreads feature for this Context.
`void`	`setDelegate(boolean delegate)` Set the "delegate first" flag for this class loader.
`protected void`	`setJavaseClassLoader(ClassLoader classLoader)`
`void`	`setResources(WebResourceRoot resources)` Set associated resources.
`void`	`start()` Start the class loader.
`void`	`stop()` Stop the class loader.
`String`	`toString()` Render a String representation of this object.
`protected boolean`	`validate(String name)` Validate a classname.

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.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.tomcat.InstrumentableClassLoader
copyWithoutTransformers

- Field Detail
  - packageTriggersDeny
```
protected final Matcher packageTriggersDeny
```
    Regular expression of package names which are not allowed to be loaded from a webapp class loader without delegating first.
  - packageTriggersPermit
```
protected final Matcher packageTriggersPermit
```
    Regular expression of package names which are allowed to be loaded from a webapp class loader without delegating first and override any set by packageTriggersDeny.
  - sm
```
protected static final StringManager sm
```
    The string manager for this package.
  - resources
```
protected WebResourceRoot resources
```
    Associated web resources for this webapp.
  - resourceEntries
```
protected final Map<String,ResourceEntry> resourceEntries
```
    The cache of ResourceEntry for classes and resources we have loaded, keyed by resource path, not binary name. Path is used as the key since resources may be requested by binary name (classes) or path (other resources such as property files) and the mapping from binary name to path is unambiguous but the reverse mapping is ambiguous.
  - delegate
```
protected boolean delegate
```
    Should this class loader delegate to the parent class loader before searching its own repositories (i.e. the usual Java2 delegation model)? If set to false, this class loader will search its own repositories first, and delegate to the parent only if the class or resource is not found locally. Note that the default, false, is the behavior called for by the servlet specification.
  - permissionList
```
protected final ArrayList<Permission> permissionList
```
    A list of read File and Jndi Permission's required if this loader is for a web application context.
  - loaderPC
```
protected final HashMap<String,PermissionCollection> loaderPC
```
    The PermissionCollection for each CodeSource for a web application context.
  - securityManager
```
protected final SecurityManager securityManager
```
    Instance of the SecurityManager installed.
  - parent
```
protected final ClassLoader parent
```
    The parent class loader.
  - needConvert
```
protected boolean needConvert
```
    need conversion for properties files
  - allPermission
```
protected final Permission allPermission
```
    All permission.
- Constructor Detail
  - WebappClassLoaderBase
```
protected WebappClassLoaderBase()
```
    Construct a new ClassLoader with no defined repositories and no parent ClassLoader.
  - WebappClassLoaderBase
```
protected WebappClassLoaderBase(ClassLoader parent)
```
    Construct a new ClassLoader with no defined repositories and the given parent ClassLoader.
    Method is used via reflection - see WebappLoader.createClassLoader()
    
    Parameters:
    parent - Our parent class loader
- Method Detail
  - getResources
```
public WebResourceRoot getResources()
```
    Get associated resources.
  - setResources
```
public void setResources(WebResourceRoot resources)
```
    Set associated resources.
  - getContextName
```
public String getContextName()
```
    Return the context name for this class loader.
  - getDelegate
```
public boolean getDelegate()
```
    Return the "delegate first" flag for this class loader.
  - setDelegate
```
public void setDelegate(boolean delegate)
```
    Set the "delegate first" flag for this class loader. If this flag is true, this class loader delegates to the parent class loader before searching its own repositories, as in an ordinary (non-servlet) chain of Java class loaders. If set to false (the default), this class loader will search its own repositories first, and delegate to the parent only if the class or resource is not found locally, as per the servlet specification.
    
    Parameters:
    delegate - The new "delegate first" flag
  - getClearReferencesStatic
```
public boolean getClearReferencesStatic()
```
    Return the clearReferencesStatic flag for this Context.
  - setClearReferencesStatic
```
public void setClearReferencesStatic(boolean clearReferencesStatic)
```
    Set the clearReferencesStatic feature for this Context.
    
    Parameters:
    clearReferencesStatic - The new flag value
  - getClearReferencesStopThreads
```
public boolean getClearReferencesStopThreads()
```
    Return the clearReferencesStopThreads flag for this Context.
  - setClearReferencesStopThreads
```
public void setClearReferencesStopThreads(boolean clearReferencesStopThreads)
```
    Set the clearReferencesStopThreads feature for this Context.
    
    Parameters:
    clearReferencesStopThreads - The new flag value
  - getClearReferencesStopTimerThreads
```
public boolean getClearReferencesStopTimerThreads()
```
    Return the clearReferencesStopTimerThreads flag for this Context.
  - setClearReferencesStopTimerThreads
```
public void setClearReferencesStopTimerThreads(boolean clearReferencesStopTimerThreads)
```
    Set the clearReferencesStopTimerThreads feature for this Context.
    
    Parameters:
    clearReferencesStopTimerThreads - The new flag value
  - getClearReferencesLogFactoryRelease
```
public boolean getClearReferencesLogFactoryRelease()
```
    Return the clearReferencesLogFactoryRelease flag for this Context.
  - setClearReferencesLogFactoryRelease
```
public void setClearReferencesLogFactoryRelease(boolean clearReferencesLogFactoryRelease)
```
    Set the clearReferencesLogFactoryRelease feature for this Context.
    
    Parameters:
    clearReferencesLogFactoryRelease - The new flag value
  - getClearReferencesHttpClientKeepAliveThread
```
public boolean getClearReferencesHttpClientKeepAliveThread()
```
    Return the clearReferencesHttpClientKeepAliveThread flag for this Context.
  - setClearReferencesHttpClientKeepAliveThread
```
public void setClearReferencesHttpClientKeepAliveThread(boolean clearReferencesHttpClientKeepAliveThread)
```
    Set the clearReferencesHttpClientKeepAliveThread feature for this Context.
    
    Parameters:
    clearReferencesHttpClientKeepAliveThread - The new flag value
  - addTransformer
```
public void addTransformer(ClassFileTransformer transformer)
```
    Adds the specified class file transformer to this class loader. The transformer will then be able to modify the bytecode of any classes loaded by this class loader after the invocation of this method.
    
    Specified by:
    
    addTransformer in interface InstrumentableClassLoader
    
    Parameters:
    transformer - The transformer to add to the class loader
  - removeTransformer
```
public void removeTransformer(ClassFileTransformer transformer)
```
    Removes the specified class file transformer from this class loader. It will no longer be able to modify the byte code of any classes loaded by the class loader after the invocation of this method. However, any classes already modified by this transformer will remain transformed.
    
    Specified by:
    
    removeTransformer in interface InstrumentableClassLoader
    
    Parameters:
    transformer - The transformer to remove
  - copyStateWithoutTransformers
```
protected void copyStateWithoutTransformers(WebappClassLoaderBase base)
```
  - modified
```
public boolean modified()
```
    Have one or more classes or resources been modified so that a reload is appropriate?
  - toString
```
public String toString()
```
    Render a String representation of this object.
    
    Overrides:
    
    toString in class Object
  - doDefineClass
```
protected final Class<?> doDefineClass(String name,
                     byte[] b,
                     int off,
                     int len,
                     ProtectionDomain protectionDomain)
```
    Expose this method for use by the unit tests.
  - findClass
```
public Class<?> findClass(String name)
                   throws ClassNotFoundException
```
    Find the specified class in our local repositories, if possible. If not found, throw ClassNotFoundException.
    
    Overrides:
    
    findClass in class URLClassLoader
    
    Parameters:
    name - The binary name of the class to be loaded
    
    Throws:
    
    ClassNotFoundException - if the class was not found
  - findResource
```
public URL findResource(String name)
```
    Find the specified resource in our local repository, and return a URL referring to it, or null if this resource cannot be found.
    
    Overrides:
    
    findResource in class URLClassLoader
    
    Parameters:
    name - Name of the resource to be found
  - findResources
```
public Enumeration<URL> findResources(String name)
                               throws IOException
```
    Return an enumeration of URLs representing all of the resources with the given name. If no resources with this name are found, return an empty enumeration.
    
    Overrides:
    
    findResources in class URLClassLoader
    
    Parameters:
    name - Name of the resources to be found
    
    Throws:
    
    IOException - if an input/output error occurs
  - getResource
```
public URL getResource(String name)
```
    Find the resource with the given name. A resource is some data (images, audio, text, etc.) that can be accessed by class code in a way that is independent of the location of the code. The name of a resource is a "/"-separated path name that identifies the resource. If the resource cannot be found, return null.
    This method searches according to the following algorithm, returning as soon as it finds the appropriate URL. If the resource cannot be found, returns null.
    - If the delegate property is set to true, call the getResource() method of the parent class loader, if any.
    - Call findResource() to find this resource in our locally defined repositories.
    - Call the getResource() method of the parent class loader, if any.
    Overrides:
    
    getResource in class ClassLoader
    
    Parameters:
    name - Name of the resource to return a URL for
  - getResourceAsStream
```
public InputStream getResourceAsStream(String name)
```
    Find the resource with the given name, and return an input stream that can be used for reading it. The search order is as described for getResource(), after checking to see if the resource data has been previously cached. If the resource cannot be found, return null.
    
    Overrides:
    
    getResourceAsStream in class URLClassLoader
    
    Parameters:
    name - Name of the resource to return an input stream for
  - loadClass
```
public Class<?> loadClass(String name)
                   throws ClassNotFoundException
```
    Load the class with the specified name. This method searches for classes in the same manner as loadClass(String, boolean) with false as the second argument.
    
    Overrides:
    
    loadClass in class ClassLoader
    
    Parameters:
    name - The binary name of the class to be loaded
    
    Throws:
    
    ClassNotFoundException - if the class was not found
  - loadClass
```
public Class<?> loadClass(String name,
                 boolean resolve)
                   throws ClassNotFoundException
```
    Load the class with the specified name, searching using the following algorithm until it finds and returns the class. If the class cannot be found, returns ClassNotFoundException.
    - Call findLoadedClass(String) to check if the class has already been loaded. If it has, the same Class object is returned.
    - If the delegate property is set to true, call the loadClass() method of the parent class loader, if any.
    - Call findClass() to find this class in our locally defined repositories.
    - Call the loadClass() method of our parent class loader, if any.
    If the class was found using the above steps, and the resolve flag is true, this method will then call resolveClass(Class) on the resulting Class object.
    Overrides:
    
    loadClass in class ClassLoader
    
    Parameters:
    name - The binary name of the class to be loaded
    resolve - If true then resolve the class
    
    Throws:
    
    ClassNotFoundException - if the class was not found
  - checkStateForClassLoading
```
protected void checkStateForClassLoading(String className)
                                  throws ClassNotFoundException
```
    Throws:
    
    ClassNotFoundException
  - getPermissions
```
protected PermissionCollection getPermissions(CodeSource codeSource)
```
    Get the Permissions for a CodeSource. If this instance of WebappClassLoaderBase is for a web application context, add read FilePermission or JndiPermissions for the base directory (if unpacked), the context URL, and jar file resources.
    
    Overrides:
    
    getPermissions in class URLClassLoader
    
    Parameters:
    codeSource - where the code was loaded from
    
    Returns:
    PermissionCollection for CodeSource
  - getURLs
```
public URL[] getURLs()
```
    Note that list of URLs returned by this method may not be complete. The web application class loader accesses class loader resources via the WebResourceRoot which supports the arbitrary mapping of additional files, directories and contents of JAR files under WEB-INF/classes. Any such resources will not be included in the URLs returned here.
    
    Overrides:
    
    getURLs in class URLClassLoader
  - addLifecycleListener
```
public void addLifecycleListener(LifecycleListener listener)
```
    Add a lifecycle event listener to this component.
    
    Specified by:
    
    addLifecycleListener in interface Lifecycle
    
    Parameters:
    listener - The listener to add
  - findLifecycleListeners
```
public LifecycleListener[] findLifecycleListeners()
```
    Get the lifecycle listeners associated with this lifecycle. If this Lifecycle has no listeners registered, a zero-length array is returned.
    
    Specified by:
    
    findLifecycleListeners in interface Lifecycle
  - removeLifecycleListener
```
public void removeLifecycleListener(LifecycleListener listener)
```
    Remove a lifecycle event listener from this component.
    
    Specified by:
    
    removeLifecycleListener in interface Lifecycle
    
    Parameters:
    listener - The listener to remove
  - getState
```
public LifecycleState getState()
```
    Obtain the current state of the source component.
    
    Specified by:
    
    getState in interface Lifecycle
    
    Returns:
    The current state of the source component.
  - getStateName
```
public String getStateName()
```
    Obtain a textual representation of the current component state. Useful for JMX.
    
    Specified by:
    
    getStateName in interface Lifecycle
  - init
```
public void init()
```
    Description copied from interface: Lifecycle
    Prepare the component for starting. This method should perform any initialization required post object creation. The following LifecycleEvents will be fired in the following order:
    1. INIT_EVENT: On the successful completion of component initialization.
    Specified by:
    
    init in interface Lifecycle
  - start
```
public void start()
           throws LifecycleException
```
    Start the class loader.
    
    Specified by:
    
    start in interface Lifecycle
    
    Throws:
    
    LifecycleException - if a lifecycle error occurs
  - stop
```
public void stop()
          throws LifecycleException
```
    Stop the class loader.
    
    Specified by:
    
    stop in interface Lifecycle
    
    Throws:
    
    LifecycleException - if a lifecycle error occurs
  - destroy
```
public void destroy()
```
    Description copied from interface: Lifecycle
    Prepare to discard the object. The following LifecycleEvents will be fired in the following order:
    1. DESTROY_EVENT: On the successful completion of component destruction.
    Specified by:
    
    destroy in interface Lifecycle
  - getJavaseClassLoader
```
protected ClassLoader getJavaseClassLoader()
```
  - setJavaseClassLoader
```
protected void setJavaseClassLoader(ClassLoader classLoader)
```
  - clearReferences
```
protected void clearReferences()
```
    Clear references.
  - findClassInternal
```
protected Class<?> findClassInternal(String name)
```
    Find specified class in local repositories.
    
    Parameters:
    name - The binary name of the class to be loaded
    
    Returns:
    the loaded class, or null if the class isn't found
  - findResourceInternal
```
protected ResourceEntry findResourceInternal(String name,
                                 String path)
```
    Find specified resource in local repositories.
    
    Returns:
    the loaded resource, or null if the resource isn't found
  - isPackageSealed
```
protected boolean isPackageSealed(String name,
                      Manifest man)
```
    Returns true if the specified package name is sealed according to the given manifest.
  - findLoadedResource
```
protected InputStream findLoadedResource(String name)
```
    Finds the resource with the given name if it has previously been loaded and cached by this class loader, and return an input stream to the resource data. If this resource has not been cached, return null.
    
    Parameters:
    name - Name of the resource to return
  - findLoadedClass0
```
protected Class<?> findLoadedClass0(String name)
```
    Finds the class with the given name if it has previously been loaded and cached by this class loader, and return the Class object. If this class has not been cached, return null.
    
    Parameters:
    name - The binary name of the resource to return
  - refreshPolicy
```
protected void refreshPolicy()
```
    Refresh the system policy file, to pick up eventual changes.
  - filter
```
protected boolean filter(String name)
```
    Filter classes.
    
    Parameters:
    name - class name
    
    Returns:
    true if the class should be filtered
  - validate
```
protected boolean validate(String name)
```
    Validate a classname. As per SRV.9.7.2, we must restrict loading of classes from J2SE (java.*) and most classes of the servlet API (javax.servlet.*). That should enhance robustness and prevent a number of user error (where an older version of servlet.jar would be present in /WEB-INF/lib).
    
    Parameters:
    name - class name
    
    Returns:
    true if the name is valid
  - addURL
```
protected void addURL(URL url)
```
    Overrides:
    
    addURL in class URLClassLoader
  - getWebappName
```
public String getWebappName()
```
    Description copied from interface: WebappProperties
    
    Returns a name for the web application or null if none is available.
    
    Specified by:
    
    getWebappName in interface WebappProperties
  - getHostName
```
public String getHostName()
```
    Description copied from interface: WebappProperties
    
    Returns a name for the Host where the web application is deployed or null if none is available.
    
    Specified by:
    
    getHostName in interface WebappProperties
  - getServiceName
```
public String getServiceName()
```
    Description copied from interface: WebappProperties
    
    Returns a name for the service where the Host is deployed or null if none is available.
    
    Specified by:
    
    getServiceName in interface WebappProperties

Class WebappClassLoaderBase

Nested Class Summary

Field Summary

Fields inherited from interface org.apache.catalina.Lifecycle

Constructor Summary

Method Summary

Methods inherited from class java.net.URLClassLoader

Methods inherited from class java.security.SecureClassLoader

Methods inherited from class java.lang.ClassLoader

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.tomcat.InstrumentableClassLoader

Field Detail

packageTriggersDeny

packageTriggersPermit

sm

resources

resourceEntries

delegate

permissionList

loaderPC

securityManager

parent

needConvert

allPermission

Constructor Detail

WebappClassLoaderBase

WebappClassLoaderBase

Method Detail

getResources

setResources

getContextName

getDelegate

setDelegate

getClearReferencesStatic

setClearReferencesStatic

getClearReferencesStopThreads

setClearReferencesStopThreads

getClearReferencesStopTimerThreads

setClearReferencesStopTimerThreads

getClearReferencesLogFactoryRelease

setClearReferencesLogFactoryRelease

getClearReferencesHttpClientKeepAliveThread

setClearReferencesHttpClientKeepAliveThread

addTransformer

removeTransformer

copyStateWithoutTransformers

modified

toString

doDefineClass

findClass

findResource

findResources

getResource

getResourceAsStream

loadClass

loadClass

checkStateForClassLoading

getPermissions

getURLs

addLifecycleListener

findLifecycleListeners

removeLifecycleListener

getState

getStateName

init

start

stop

destroy

getJavaseClassLoader

setJavaseClassLoader

clearReferences

findClassInternal

findResourceInternal

isPackageSealed

findLoadedResource

findLoadedClass0

refreshPolicy

filter

validate

addURL