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Java Source Code / Java Documentation » Sevlet Container » apache tomcat 6.0.14 » org.apache.catalina.loader

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.apache.catalina.loader .WebappLoader

All known Subclasses:   org.apache.catalina.loader .VirtualWebappLoader,
WebappLoader
public class WebappLoader implements Lifecycle,Loader,PropertyChangeListener,MBeanRegistration(Code)
Classloader implementation which is specialized for handling web applications in the most efficient way, while being Catalina aware (all accesses to resources are made through the DirContext interface). This class loader supports detection of modified Java classes, which can be used to implement auto-reload support.
This class loader is configured by adding the pathnames of directories, JAR files, and ZIP files with the addRepository() method, prior to calling start(). When a new class is required, these repositories will be consulted first to locate the class. If it is not present, the system class loader will be used instead.
author:
   Craig R. McClanahan
author:
   Remy Maucherat
version:
   $Revision: 505593 $ $Date: 2007-02-10 01:54:56 +0100 (sam., 10 févr. 2007) $

Field Summary
protected LifecycleSupport lifecycle
     The lifecycle event support for this component.
final protected static StringManager sm
     The string manager for this package.
protected PropertyChangeSupport support
     The property change support for this component.

Constructor Summary
public WebappLoader()
     Construct a new WebappLoader with no defined parent class loader (so that the actual parent will be the system class loader).
public WebappLoader(ClassLoader parent)
     Construct a new WebappLoader with the specified class loader to be defined as the parent of the ClassLoader we ultimately create.

Method Summary
public void addLifecycleListener(LifecycleListener listener)
     Add a lifecycle event listener to this component.
public void addPropertyChangeListener(PropertyChangeListener listener)
     Add a property change listener to this component.
public void addRepository(String repository)
     Add a new repository to the set of repositories for this class loader.
public void backgroundProcess()
     Execute a periodic task, such as reloading, etc.
public void closeJARs(boolean force)
     Used to periodically signal to the classloader to release JAR resources.
public void destroy()

public LifecycleListener[] findLifecycleListeners()
     Get the lifecycle listeners associated with this lifecycle.
public String[] findRepositories()
     Return the set of repositories defined for this class loader.
public ClassLoader getClassLoader()
     Return the Java class loader to be used by this Container.
public String getClasspath()

public Container getContainer()
     Return the Container with which this Logger has been associated.
public ObjectName getController()

public boolean getDelegate()
     Return the "follow standard delegation model" flag used to configure our ClassLoader.
public String getInfo()
     Return descriptive information about this Loader implementation and the corresponding version number, in the format <description>/<version>.
public String getLoaderClass()
     Return the ClassLoader class name.
public String[] getLoaderRepositories()

public String getLoaderRepositoriesString()

public boolean getReloadable()
     Return the reloadable flag for this Loader.
public String[] getRepositories()

public String getRepositoriesString()

public void init()

public boolean modified()

public void postDeregister()

public void postRegister(Boolean registrationDone)

public void preDeregister()

public ObjectName preRegister(MBeanServer server, ObjectName name)

public void propertyChange(PropertyChangeEvent event)
     Process property change events from our associated Context.
public void removeLifecycleListener(LifecycleListener listener)
     Remove a lifecycle event listener from this component.
public void removePropertyChangeListener(PropertyChangeListener listener)
     Remove a property change listener from this component.
public void setContainer(Container container)
     Set the Container with which this Logger has been associated.
public void setController(ObjectName controller)

public void setDelegate(boolean delegate)
     Set the "follow standard delegation model" flag used to configure our ClassLoader.
public void setLoaderClass(String loaderClass)
     Set the ClassLoader class name.
public void setReloadable(boolean reloadable)
     Set the reloadable flag for this Loader.
public void start()
     Start this component, initializing our associated class loader.
public void stop()
     Stop this component, finalizing our associated class loader.
public String toString()
     Return a String representation of this component.

Field Detail
lifecycle
protected LifecycleSupport lifecycle(Code)
The lifecycle event support for this component.

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

support
protected PropertyChangeSupport support(Code)
The property change support for this component.

Constructor Detail
WebappLoader
public WebappLoader()(Code)
Construct a new WebappLoader with no defined parent class loader (so that the actual parent will be the system class loader).

WebappLoader
public WebappLoader(ClassLoader parent)(Code)
Construct a new WebappLoader with the specified class loader to be defined as the parent of the ClassLoader we ultimately create.
Parameters:
  parent - The parent class loader

Method Detail
addLifecycleListener
public void addLifecycleListener(LifecycleListener listener)(Code)
Add a lifecycle event listener to this component.
Parameters:
  listener - The listener to add

addPropertyChangeListener
public void addPropertyChangeListener(PropertyChangeListener listener)(Code)
Add a property change listener to this component.
Parameters:
  listener - The listener to add

addRepository
public void addRepository(String repository)(Code)
Add a new repository to the set of repositories for this class loader.
Parameters:
  repository - Repository to be added

backgroundProcess
public void backgroundProcess()(Code)
Execute a periodic task, such as reloading, etc. This method will be invoked inside the classloading context of this container. Unexpected throwables will be caught and logged.

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

destroy
public void destroy()(Code)

findLifecycleListeners
public LifecycleListener[] findLifecycleListeners()(Code)
Get the lifecycle listeners associated with this lifecycle. If this Lifecycle has no listeners registered, a zero-length array is returned.

findRepositories
public String[] findRepositories()(Code)
Return the set of repositories defined for this class loader. If none are defined, a zero-length array is returned. For security reason, returns a clone of the Array (since String are immutable).

getClassLoader
public ClassLoader getClassLoader()(Code)
Return the Java class loader to be used by this Container.

getClasspath
public String getClasspath()(Code)
Classpath, as set in org.apache.catalina.jsp_classpath context property The classpath

getContainer
public Container getContainer()(Code)
Return the Container with which this Logger has been associated.

getController
public ObjectName getController()(Code)

getDelegate
public boolean getDelegate()(Code)
Return the "follow standard delegation model" flag used to configure our ClassLoader.

getInfo
public String getInfo()(Code)
Return descriptive information about this Loader implementation and the corresponding version number, in the format <description>/<version>.

getLoaderClass
public String getLoaderClass()(Code)
Return the ClassLoader class name.

getLoaderRepositories
public String[] getLoaderRepositories()(Code)

getLoaderRepositoriesString
public String getLoaderRepositoriesString()(Code)

getReloadable
public boolean getReloadable()(Code)
Return the reloadable flag for this Loader.

getRepositories
public String[] getRepositories()(Code)

getRepositoriesString
public String getRepositoriesString()(Code)
Extra repositories for this loader

init
public void init()(Code)

modified
public boolean modified()(Code)
Has the internal repository associated with this Loader been modified, such that the loaded classes should be reloaded?

postDeregister
public void postDeregister()(Code)

postRegister
public void postRegister(Boolean registrationDone)(Code)

preDeregister
public void preDeregister() throws Exception(Code)

preRegister
public ObjectName preRegister(MBeanServer server, ObjectName name) throws Exception(Code)

propertyChange
public void propertyChange(PropertyChangeEvent event)(Code)
Process property change events from our associated Context.
Parameters:
  event - The property change event that has occurred

removeLifecycleListener
public void removeLifecycleListener(LifecycleListener listener)(Code)
Remove a lifecycle event listener from this component.
Parameters:
  listener - The listener to remove

removePropertyChangeListener
public void removePropertyChangeListener(PropertyChangeListener listener)(Code)
Remove a property change listener from this component.
Parameters:
  listener - The listener to remove

setContainer
public void setContainer(Container container)(Code)
Set the Container with which this Logger has been associated.
Parameters:
  container - The associated Container

setController
public void setController(ObjectName controller)(Code)

setDelegate
public void setDelegate(boolean delegate)(Code)
Set the "follow standard delegation model" flag used to configure our ClassLoader.
Parameters:
  delegate - The new flag

setLoaderClass
public void setLoaderClass(String loaderClass)(Code)
Set the ClassLoader class name.
Parameters:
  loaderClass - The new ClassLoader class name

setReloadable
public void setReloadable(boolean reloadable)(Code)
Set the reloadable flag for this Loader.
Parameters:
  reloadable - The new reloadable flag

start
public void start() throws LifecycleException(Code)
Start this component, initializing our associated class loader.
exception:
  LifecycleException - if a lifecycle error occurs

stop
public void stop() throws LifecycleException(Code)
Stop this component, finalizing our associated class loader.
exception:
  LifecycleException - if a lifecycle error occurs

toString
public String toString()(Code)
Return a String representation of this component.

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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