Apache Tomcat 6.0.39

org.apache.catalina.loader
Class WebappClassLoader

java.lang.Object
  extended by java.lang.ClassLoader
      extended by java.security.SecureClassLoader
          extended by java.net.URLClassLoader
              extended by org.apache.catalina.loader.WebappClassLoader
All Implemented Interfaces:
Lifecycle, Reloader

public class WebappClassLoader
extends java.net.URLClassLoader
implements Reloader, Lifecycle

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 - This class loader faithfully follows the delegation model recommended in 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 repository.

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.

Version:
$Id: WebappClassLoader.java 1356198 2012-07-02 12:04:11Z kkolinko $
Author:
Remy Maucherat, Craig R. McClanahan

Nested Class Summary
protected  class WebappClassLoader.PrivilegedFindResource
          Deprecated. Not used
protected  class WebappClassLoader.PrivilegedFindResourceByName
           
protected  class WebappClassLoader.PrivilegedGetClassLoader
           
 
Field Summary
protected  java.security.Permission allPermission
          All permission.
protected  java.lang.String canonicalLoaderDir
           
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)?
static boolean ENABLE_CLEAR_REFERENCES
           
protected  java.io.File[] files
          Repositories translated as path in the work directory (for Jasper originally), but which is used to generate fake URLs should getURLs be called.
protected  boolean hasExternalRepositories
          Has external repositories.
protected  java.util.jar.JarFile[] jarFiles
          The list of JARs, in the order they should be searched for locally loaded classes or resources.
protected  java.lang.String[] jarNames
          The list of JARs, in the order they should be searched for locally loaded classes or resources.
protected  java.lang.String jarPath
          The path which will be monitored for added Jar files.
protected  java.io.File[] jarRealFiles
          The list of JARs, in the order they should be searched for locally loaded classes or resources.
protected  long lastJarAccessed
          Last time a JAR was accessed.
protected  long[] lastModifiedDates
          The list of JARs last modified dates, in the order they should be searched for locally loaded classes or resources.
protected  java.io.File loaderDir
          Path where resources loaded from JARs will be extracted.
protected  java.util.HashMap loaderPC
          The PermissionCollection for each CodeSource for a web application context.
protected static Log log
           
protected  boolean needConvert
          need conversion for properties files
protected  java.util.HashMap<java.lang.String,java.lang.String> notFoundResources
          The list of not found resources.
protected static java.lang.String[] packageTriggers
          Set of package names which are not allowed to be loaded from a webapp class loader without delegating first.
protected  java.lang.ClassLoader parent
          The parent class loader.
protected  java.lang.String[] paths
          The list of resources which should be checked when checking for modifications.
protected  java.util.ArrayList permissionList
          A list of read File and Jndi Permission's required if this loader is for a web application context.
protected  java.lang.String[] repositories
          The list of local repositories, in the order they should be searched for locally loaded classes or resources.
protected  java.net.URL[] repositoryURLs
          Repositories URLs, used to cache the result of getURLs.
protected  java.util.HashMap resourceEntries
          The cache of ResourceEntry for classes and resources we have loaded, keyed by resource name.
protected  javax.naming.directory.DirContext resources
          Associated directory context giving access to the resources in this webapp.
protected  boolean searchExternalFirst
          Search external repositories first
protected  java.lang.SecurityManager securityManager
          Instance of the SecurityManager installed.
protected static StringManager sm
          The string manager for this package.
protected  boolean started
          Has this component been started?
protected  java.lang.ClassLoader system
          The system class loader.
protected static java.lang.String[] triggers
          The set of trigger classes that will cause a proposed repository not to be added if this class is visible to the class loader that loaded this factory class.
 
Fields inherited from interface org.apache.catalina.Lifecycle
AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, DESTROY_EVENT, INIT_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT
 
Constructor Summary
WebappClassLoader()
          Construct a new ClassLoader with no defined repositories and no parent ClassLoader.
WebappClassLoader(java.lang.ClassLoader parent)
          Construct a new ClassLoader with no defined repositories and the given parent ClassLoader.
 
Method Summary
 void addLifecycleListener(LifecycleListener listener)
          Add a lifecycle event listener to this component.
 void addPermission(java.security.Permission permission)
          If there is a Java SecurityManager create a Permission.
 void addPermission(java.lang.String path)
          If there is a Java SecurityManager create a read FilePermission or JndiPermission for the file directory path.
 void addPermission(java.net.URL url)
          If there is a Java SecurityManager create a read FilePermission or JndiPermission for URL.
 void addRepository(java.lang.String repository)
          Add a new repository to the set of places this ClassLoader can look for classes to be loaded.
protected  void addURL(java.net.URL url)
          Add the specified URL to the classloader.
protected  void clearReferences()
          Clear references.
 void closeJARs(boolean force)
          Used to periodically signal to the classloader to release JAR resources.
protected static void deleteDir(java.io.File dir)
          Delete the specified directory, including all of its contents and subdirectories recursively.
protected  boolean filter(java.lang.String name)
          Filter classes.
 java.lang.Class findClass(java.lang.String name)
          Find the specified class in our local repositories, if possible.
protected  java.lang.Class findClassInternal(java.lang.String name)
          Find specified class in local repositories.
 LifecycleListener[] findLifecycleListeners()
          Get the lifecycle listeners associated with this lifecycle.
protected  java.lang.Class findLoadedClass0(java.lang.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  java.io.InputStream findLoadedResource(java.lang.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.
 java.lang.String[] findRepositories()
          Return a String array of the current repositories for this class loader.
 java.net.URL findResource(java.lang.String name)
          Find the specified resource in our local repository, and return a URL refering to it, or null if this resource cannot be found.
protected  ResourceEntry findResourceInternal(java.io.File file, java.lang.String path)
          Find specified resource in local repositories.
protected  ResourceEntry findResourceInternal(java.lang.String name, java.lang.String path)
          Find specified resource in local repositories.
 java.util.Enumeration findResources(java.lang.String name)
          Return an enumeration of URLs representing all of the resources with the given name.
 boolean getAntiJARLocking()
           
 boolean getClearReferencesHttpClientKeepAliveThread()
          Return the clearReferencesHttpClientKeepAliveThread flag for this Context.
 boolean getClearReferencesLogFactoryRelease()
          Return the clearReferencesLogFactoryRelease flag for this Context.
 boolean getClearReferencesStopThreads()
          Return the clearReferencesStopThreads flag for this Context.
 boolean getClearReferencesStopTimerThreads()
          Return the clearReferencesStopTimerThreads flag for this Context.
 boolean getClearReferencesThreadLocals()
          Return the clearReferencesThreadLocals flag for this Context.
 java.lang.String getContextName()
          Return the context name for this class loader.
 boolean getDelegate()
          Return the "delegate first" flag for this class loader.
 java.lang.String getJarPath()
          Return the JAR path.
protected  java.security.PermissionCollection getPermissions(java.security.CodeSource codeSource)
          Get the Permissions for a CodeSource.
 java.net.URL getResource(java.lang.String name)
          Find the resource with the given name.
 java.io.InputStream getResourceAsStream(java.lang.String name)
          Find the resource with the given name, and return an input stream that can be used for reading it.
 javax.naming.directory.DirContext getResources()
          Get associated resources.
 boolean getSearchExternalFirst()
           
protected  java.net.URL getURI(java.io.File file)
          Get URL.
protected  java.net.URL getURL(java.io.File file, boolean encoded)
          Get URL.
 java.net.URL[] getURLs()
          Returns the search path of URLs for loading classes and resources.
protected  boolean isPackageSealed(java.lang.String name, java.util.jar.Manifest man)
          Returns true if the specified package name is sealed according to the given manifest.
 boolean isStarted()
           
 java.lang.Class loadClass(java.lang.String name)
          Load the class with the specified name.
 java.lang.Class loadClass(java.lang.String name, boolean resolve)
          Load the class with the specified name, searching using the following algorithm until it finds and returns the class.
protected  boolean loadedByThisOrChild(java.lang.Class clazz)
          Determine whether a class was loaded by this class loader or one of its child class loaders.
 boolean modified()
          Have one or more classes or resources been modified so that a reload is appropriate?
protected  boolean openJARs()
          Used to periodically signal to the classloader to release JAR resources.
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 setAntiJARLocking(boolean antiJARLocking)
           
 void setClearReferencesHttpClientKeepAliveThread(boolean clearReferencesHttpClientKeepAliveThread)
          Set the clearReferencesHttpClientKeepAliveThread feature for this Context.
 void setClearReferencesLogFactoryRelease(boolean clearReferencesLogFactoryRelease)
          Set the clearReferencesLogFactoryRelease 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 setClearReferencesThreadLocals(boolean clearReferencesThreadLocals)
          Set the clearReferencesThreadLocals feature for this Context.
 void setDelegate(boolean delegate)
          Set the "delegate first" flag for this class loader.
 void setJarPath(java.lang.String jarPath)
          Change the Jar path.
protected  void setParentClassLoader(java.lang.ClassLoader pcl)
          Utility method for use in subclasses.
 void setResources(javax.naming.directory.DirContext resources)
          Set associated resources.
 void setSearchExternalFirst(boolean searchExternalFirst)
           
 void setWorkDir(java.io.File workDir)
          Change the work directory.
 void start()
          Start the class loader.
 void stop()
          Stop the class loader.
 java.lang.String toString()
          Render a String representation of this object.
protected  boolean validate(java.lang.String name)
          Validate a classname.
protected  boolean validateJarFile(java.io.File file)
          Check the specified JAR file, and return true if it does not contain any of the trigger classes.
 
Methods inherited from class java.net.URLClassLoader
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, findLibrary, findLoadedClass, findSystemClass, getPackage, getPackages, getParent, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

log

protected static Log log

ENABLE_CLEAR_REFERENCES

public static final boolean ENABLE_CLEAR_REFERENCES

triggers

protected static final java.lang.String[] triggers
The set of trigger classes that will cause a proposed repository not to be added if this class is visible to the class loader that loaded this factory class. Typically, trigger classes will be listed for components that have been integrated into the JDK for later versions, but where the corresponding JAR files are required to run on earlier versions.


packageTriggers

protected static final java.lang.String[] packageTriggers
Set of package names which are not allowed to be loaded from a webapp class loader without delegating first.


sm

protected static final StringManager sm
The string manager for this package.


resources

protected javax.naming.directory.DirContext resources
Associated directory context giving access to the resources in this webapp.


resourceEntries

protected java.util.HashMap resourceEntries
The cache of ResourceEntry for classes and resources we have loaded, keyed by resource name.


notFoundResources

protected java.util.HashMap<java.lang.String,java.lang.String> notFoundResources
The list of not found resources.


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.


lastJarAccessed

protected long lastJarAccessed
Last time a JAR was accessed.


repositories

protected java.lang.String[] repositories
The list of local repositories, in the order they should be searched for locally loaded classes or resources.


repositoryURLs

protected java.net.URL[] repositoryURLs
Repositories URLs, used to cache the result of getURLs.


files

protected java.io.File[] files
Repositories translated as path in the work directory (for Jasper originally), but which is used to generate fake URLs should getURLs be called.


jarFiles

protected java.util.jar.JarFile[] jarFiles
The list of JARs, in the order they should be searched for locally loaded classes or resources.


jarRealFiles

protected java.io.File[] jarRealFiles
The list of JARs, in the order they should be searched for locally loaded classes or resources.


jarPath

protected java.lang.String jarPath
The path which will be monitored for added Jar files.


jarNames

protected java.lang.String[] jarNames
The list of JARs, in the order they should be searched for locally loaded classes or resources.


lastModifiedDates

protected long[] lastModifiedDates
The list of JARs last modified dates, in the order they should be searched for locally loaded classes or resources.


paths

protected java.lang.String[] paths
The list of resources which should be checked when checking for modifications.


permissionList

protected java.util.ArrayList permissionList
A list of read File and Jndi Permission's required if this loader is for a web application context.


loaderDir

protected java.io.File loaderDir
Path where resources loaded from JARs will be extracted.


canonicalLoaderDir

protected java.lang.String canonicalLoaderDir

loaderPC

protected java.util.HashMap loaderPC
The PermissionCollection for each CodeSource for a web application context.


securityManager

protected java.lang.SecurityManager securityManager
Instance of the SecurityManager installed.


parent

protected java.lang.ClassLoader parent
The parent class loader.


system

protected java.lang.ClassLoader system
The system class loader.


started

protected boolean started
Has this component been started?


hasExternalRepositories

protected boolean hasExternalRepositories
Has external repositories.


searchExternalFirst

protected boolean searchExternalFirst
Search external repositories first


needConvert

protected boolean needConvert
need conversion for properties files


allPermission

protected java.security.Permission allPermission
All permission.

Constructor Detail

WebappClassLoader

public WebappClassLoader()
Construct a new ClassLoader with no defined repositories and no parent ClassLoader.


WebappClassLoader

public WebappClassLoader(java.lang.ClassLoader parent)
Construct a new ClassLoader with no defined repositories and the given parent ClassLoader.

Parameters:
parent - Our parent class loader
Method Detail

getResources

public javax.naming.directory.DirContext getResources()
Get associated resources.


setResources

public void setResources(javax.naming.directory.DirContext resources)
Set associated resources.


getContextName

public java.lang.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.

Parameters:
delegate - The new "delegate first" flag

getAntiJARLocking

public boolean getAntiJARLocking()
Returns:
Returns the antiJARLocking.

setAntiJARLocking

public void setAntiJARLocking(boolean antiJARLocking)
Parameters:
antiJARLocking - The antiJARLocking to set.

getSearchExternalFirst

public boolean getSearchExternalFirst()
Returns:
Returns the searchExternalFirst.

setSearchExternalFirst

public void setSearchExternalFirst(boolean searchExternalFirst)
Parameters:
searchExternalFirst - Whether external repositories should be searched first

addPermission

public void addPermission(java.lang.String path)
If there is a Java SecurityManager create a read FilePermission or JndiPermission for the file directory path.

Parameters:
path - file directory path

addPermission

public void addPermission(java.net.URL url)
If there is a Java SecurityManager create a read FilePermission or JndiPermission for URL.

Parameters:
url - URL for a file or directory on local system

addPermission

public void addPermission(java.security.Permission permission)
If there is a Java SecurityManager create a Permission.

Parameters:
permission - The permission

getJarPath

public java.lang.String getJarPath()
Return the JAR path.


setJarPath

public void setJarPath(java.lang.String jarPath)
Change the Jar path.


setWorkDir

public void setWorkDir(java.io.File workDir)
Change the work directory.


setParentClassLoader

protected void setParentClassLoader(java.lang.ClassLoader pcl)
Utility method for use in subclasses. Must be called before Lifecycle methods to have any effect.


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

getClearReferencesThreadLocals

public boolean getClearReferencesThreadLocals()
Return the clearReferencesThreadLocals flag for this Context.


setClearReferencesThreadLocals

public void setClearReferencesThreadLocals(boolean clearReferencesThreadLocals)
Set the clearReferencesThreadLocals feature for this Context.

Parameters:
clearReferencesThreadLocals - 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

addRepository

public void addRepository(java.lang.String repository)
Add a new repository to the set of places this ClassLoader can look for classes to be loaded.

Specified by:
addRepository in interface Reloader
Parameters:
repository - Name of a source of classes to be loaded, such as a directory pathname, a JAR file pathname, or a ZIP file pathname
Throws:
java.lang.IllegalArgumentException - if the specified repository is invalid or does not exist

findRepositories

public java.lang.String[] findRepositories()
Return a String array of the current repositories for this class loader. If there are no repositories, a zero-length array is returned.For security reason, returns a clone of the Array (since String are immutable).

Specified by:
findRepositories in interface Reloader

modified

public boolean modified()
Have one or more classes or resources been modified so that a reload is appropriate?

Specified by:
modified in interface Reloader

toString

public java.lang.String toString()
Render a String representation of this object.

Overrides:
toString in class java.lang.Object

addURL

protected void addURL(java.net.URL url)
Add the specified URL to the classloader.

Overrides:
addURL in class java.net.URLClassLoader

findClass

public java.lang.Class findClass(java.lang.String name)
                          throws java.lang.ClassNotFoundException
Find the specified class in our local repositories, if possible. If not found, throw ClassNotFoundException.

Overrides:
findClass in class java.net.URLClassLoader
Parameters:
name - Name of the class to be loaded
Throws:
java.lang.ClassNotFoundException - if the class was not found

findResource

public java.net.URL findResource(java.lang.String name)
Find the specified resource in our local repository, and return a URL refering to it, or null if this resource cannot be found.

Overrides:
findResource in class java.net.URLClassLoader
Parameters:
name - Name of the resource to be found

findResources

public java.util.Enumeration findResources(java.lang.String name)
                                    throws java.io.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 java.net.URLClassLoader
Parameters:
name - Name of the resources to be found
Throws:
java.io.IOException - if an input/output error occurs

getResource

public java.net.URL getResource(java.lang.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.

Overrides:
getResource in class java.lang.ClassLoader
Parameters:
name - Name of the resource to return a URL for

getResourceAsStream

public java.io.InputStream getResourceAsStream(java.lang.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 java.lang.ClassLoader
Parameters:
name - Name of the resource to return an input stream for

loadClass

public java.lang.Class loadClass(java.lang.String name)
                          throws java.lang.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 java.lang.ClassLoader
Parameters:
name - Name of the class to be loaded
Throws:
java.lang.ClassNotFoundException - if the class was not found

loadClass

public java.lang.Class loadClass(java.lang.String name,
                                 boolean resolve)
                          throws java.lang.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. 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 java.lang.ClassLoader
Parameters:
name - Name of the class to be loaded
resolve - If true then resolve the class
Throws:
java.lang.ClassNotFoundException - if the class was not found

getPermissions

protected java.security.PermissionCollection getPermissions(java.security.CodeSource codeSource)
Get the Permissions for a CodeSource. If this instance of WebappClassLoader 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 java.net.URLClassLoader
Parameters:
codeSource - where the code was loaded from
Returns:
PermissionCollection for CodeSource

getURLs

public java.net.URL[] getURLs()
Returns the search path of URLs for loading classes and resources. This includes the original list of URLs specified to the constructor, along with any URLs subsequently appended by the addURL() method.

Overrides:
getURLs in class java.net.URLClassLoader
Returns:
the search path of URLs for loading classes and resources.

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

start

public void start()
           throws LifecycleException
Start the class loader.

Specified by:
start in interface Lifecycle
Throws:
LifecycleException - if a lifecycle error occurs

isStarted

public boolean isStarted()

stop

public void stop()
          throws LifecycleException
Stop the class loader.

Specified by:
stop in interface Lifecycle
Throws:
LifecycleException - if a lifecycle error occurs

closeJARs

public void closeJARs(boolean force)
Used to periodically signal to the classloader to release JAR resources.


clearReferences

protected void clearReferences()
Clear references.


loadedByThisOrChild

protected boolean loadedByThisOrChild(java.lang.Class clazz)
Determine whether a class was loaded by this class loader or one of its child class loaders.


openJARs

protected boolean openJARs()
Used to periodically signal to the classloader to release JAR resources.


findClassInternal

protected java.lang.Class findClassInternal(java.lang.String name)
                                     throws java.lang.ClassNotFoundException
Find specified class in local repositories.

Returns:
the loaded class, or null if the class isn't found
Throws:
java.lang.ClassNotFoundException

findResourceInternal

protected ResourceEntry findResourceInternal(java.io.File file,
                                             java.lang.String path)
Find specified resource in local repositories.

Returns:
the loaded resource, or null if the resource isn't found

findResourceInternal

protected ResourceEntry findResourceInternal(java.lang.String name,
                                             java.lang.String path)
Find specified resource in local repositories.

Returns:
the loaded resource, or null if the resource isn't found

isPackageSealed

protected boolean isPackageSealed(java.lang.String name,
                                  java.util.jar.Manifest man)
Returns true if the specified package name is sealed according to the given manifest.


findLoadedResource

protected java.io.InputStream findLoadedResource(java.lang.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 java.lang.Class findLoadedClass0(java.lang.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 - Name of the resource to return

refreshPolicy

protected void refreshPolicy()
Refresh the system policy file, to pick up eventual changes.


filter

protected boolean filter(java.lang.String name)
Filter classes.

Parameters:
name - class name
Returns:
true if the class should be filtered

validate

protected boolean validate(java.lang.String name)
Validate a classname. As per SRV.9.7.2, we must restict loading of classes from J2SE (java.*) and 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

validateJarFile

protected boolean validateJarFile(java.io.File file)
                           throws java.io.IOException
Check the specified JAR file, and return true if it does not contain any of the trigger classes.

Parameters:
file - The JAR file to be checked
Throws:
java.io.IOException - if an input/output error occurs

getURL

protected java.net.URL getURL(java.io.File file,
                              boolean encoded)
                       throws java.net.MalformedURLException
Get URL.

Throws:
java.net.MalformedURLException

getURI

protected java.net.URL getURI(java.io.File file)
                       throws java.net.MalformedURLException
Get URL.

Throws:
java.net.MalformedURLException

deleteDir

protected static void deleteDir(java.io.File dir)
Delete the specified directory, including all of its contents and subdirectories recursively.

Parameters:
dir - File object representing the directory to be deleted

Apache Tomcat 6.0.39

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