Package org.apache.jasper.servlet

Class JspCServletContext

java.lang.Object

org.apache.jasper.servlet.JspCServletContext

All Implemented Interfaces:

ServletContext

public class JspCServletContext
extends Object
implements ServletContext

Simple ServletContext implementation without HTTP-specific methods.

Author:

Peter Rossbach (pr@webapp.de)

Field Summary

Fields inherited from interface jakarta.servlet.ServletContext

ORDERED_LIBS, TEMPDIR

Constructor Summary

Constructors

Constructor	Description
JspCServletContext(PrintWriter aLogWriter, URL aResourceBaseURL, ClassLoader classLoader, boolean validate, boolean blockExternal)	Create a new instance of this ServletContext implementation.

Method Summary

Modifier and Type	Method	Description
FilterRegistration.Dynamic	addFilter(String filterName, Filter filter)	Add filter to context.
FilterRegistration.Dynamic	addFilter(String filterName, Class<? extends Filter> filterClass)	Add filter to context.
FilterRegistration.Dynamic	addFilter(String filterName, String className)	Add filter to context.
ServletRegistration.Dynamic	addJspFile(String jspName, String jspFile)	Add a JSP to the context.
void	addListener(Class<? extends EventListener> listenerClass)	TODO SERVLET3 - Add comments
void	addListener(String className)	TODO SERVLET3 - Add comments
<T extends EventListener> void	addListener(T t)	TODO SERVLET3 - Add comments
ServletRegistration.Dynamic	addServlet(String servletName, Servlet servlet)	Register a servlet instance for use in this ServletContext.
ServletRegistration.Dynamic	addServlet(String servletName, Class<? extends Servlet> servletClass)	Add servlet to the context.
ServletRegistration.Dynamic	addServlet(String servletName, String className)	Register a servlet implementation for use in this ServletContext.
<T extends Filter> T	createFilter(Class<T> c)	Create a Filter instance using the given class.
<T extends EventListener> T	createListener(Class<T> c)	TODO SERVLET3 - Add comments
<T extends Servlet> T	createServlet(Class<T> c)	Create an Servlet instance using the given class.
void	declareRoles(String... roleNames)	Add to the declared roles for this ServletContext.
Object	getAttribute(String name)	Returns the servlet container attribute with the given name, or null if there is no attribute by that name.
Enumeration<String>	getAttributeNames()	Returns an Enumeration containing the attribute names available within this servlet context.
ClassLoader	getClassLoader()	Get the web application class loader associated with this ServletContext.
ServletContext	getContext(String uripath)	Returns a ServletContext object that corresponds to a specified URL on the server.
String	getContextPath()	Return the main path associated with this context.
Set<SessionTrackingMode>	getDefaultSessionTrackingModes()	Obtains the default session tracking modes for this web application.
int	getEffectiveMajorVersion()	Obtain the major version of the servlet specification for which this web application is implemented.
int	getEffectiveMinorVersion()	Obtain the minor version of the servlet specification for which this web application is implemented.
Set<SessionTrackingMode>	getEffectiveSessionTrackingModes()	Obtains the currently enabled session tracking modes for this web application.
FilterRegistration	getFilterRegistration(String filterName)	TODO SERVLET3 - Add comments
Map<String,? extends FilterRegistration>	getFilterRegistrations()
String	getInitParameter(String name)	Returns a String containing the value of the named context-wide initialization parameter, or null if the parameter does not exist.
Enumeration<String>	getInitParameterNames()	Returns the names of the context's initialization parameters as an Enumeration of String objects, or an empty Enumeration if the context has no initialization parameters.
JspConfigDescriptor	getJspConfigDescriptor()
int	getMajorVersion()	Returns the major version of the Java Servlet API that this servlet container supports.
String	getMimeType(String file)	Returns the MIME type of the specified file, or null if the MIME type is not known.
int	getMinorVersion()	Returns the minor version of the Servlet API that this servlet container supports.
RequestDispatcher	getNamedDispatcher(String name)	Returns a RequestDispatcher object that acts as a wrapper for the named servlet.
String	getRealPath(String path)	Returns a String containing the real path for a given virtual path.
String	getRequestCharacterEncoding()	Get the default character encoding for reading request bodies.
RequestDispatcher	getRequestDispatcher(String path)	Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path.
URL	getResource(String path)	Returns a URL to the resource that is mapped to a specified path.
InputStream	getResourceAsStream(String path)	Returns the resource located at the named path as an InputStream object.
Set<String>	getResourcePaths(String path)	Returns a directory-like listing of all the paths to resources within the web application whose longest sub-path matches the supplied path argument.
String	getResponseCharacterEncoding()	Get the default character encoding for writing response bodies.
String	getServerInfo()	Returns the name and version of the servlet container on which the servlet is running.
String	getServletContextName()	Returns the name of this web application corresponding to this ServletContext as specified in the deployment descriptor for this web application by the display-name element.
ServletRegistration	getServletRegistration(String servletName)	Obtain the details of the named servlet.
Map<String,? extends ServletRegistration>	getServletRegistrations()	Obtain a Map of servlet names to servlet registrations for all servlets registered with this context.
SessionCookieConfig	getSessionCookieConfig()
int	getSessionTimeout()	Get the default session timeout.
String	getVirtualServerName()	Get the primary name of the virtual host on which this context is deployed.
void	log(String message)	Writes the specified message to a servlet log file, usually an event log.
void	log(String message, Throwable exception)	Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file.
void	removeAttribute(String name)	Removes the attribute with the given name from the servlet context.
void	setAttribute(String name, Object value)	Binds an object to a given attribute name in this servlet context.
boolean	setInitParameter(String name, String value)	Set the given initialisation parameter to the given value.
void	setRequestCharacterEncoding(String encoding)	Set the default character encoding to use for reading request bodies.
void	setResponseCharacterEncoding(String encoding)	Set the default character encoding to use for writing response bodies.
void	setSessionTimeout(int sessionTimeout)	Set the default session timeout.
void	setSessionTrackingModes(Set<SessionTrackingMode> sessionTrackingModes)	Configures the available session tracking modes for this web application.

Methods inherited from class java.lang.Object

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

Methods inherited from interface jakarta.servlet.ServletContext

setRequestCharacterEncoding, setResponseCharacterEncoding

Constructor Details

JspCServletContext

public JspCServletContext(PrintWriter aLogWriter,
 URL aResourceBaseURL,
 ClassLoader classLoader,
 boolean validate,
 boolean blockExternal)
                   throws JasperException

Create a new instance of this ServletContext implementation.

Parameters:

aLogWriter - PrintWriter which is used for log() calls

aResourceBaseURL - Resource base URL

classLoader - Class loader for this ServletContext

validate - Should a validating parser be used to parse web.xml?

blockExternal - Should external entities be blocked when parsing web.xml?

Throws:

JasperException - An error occurred building the merged web.xml

Method Details

getAttribute

public Object getAttribute(String name)

Description copied from interface: jakarta.servlet.ServletContext

Returns the servlet container attribute with the given name, or null if there is no attribute by that name. An attribute allows a servlet container to give the servlet additional information not already provided by this interface. See your server documentation for information about its attributes. A list of supported attributes can be retrieved using getAttributeNames.

The attribute is returned as a java.lang.Object or some subclass. Attribute names should follow the same convention as package names. The Jakarta EE platform reserves names matching jakarta.*.

Specified by:

getAttribute in interface ServletContext

Parameters:

name - a String specifying the name of the attribute

Returns:

an Object containing the value of the attribute, or null if no attribute exists matching the given name

See Also:

• ServletContext.getAttributeNames()

getAttributeNames

public Enumeration<String> getAttributeNames()

Description copied from interface: jakarta.servlet.ServletContext

Returns an Enumeration containing the attribute names available within this servlet context. Use the ServletContext.getAttribute(java.lang.String) method with an attribute name to get the value of an attribute.

Specified by:

getAttributeNames in interface ServletContext

Returns:

an Enumeration of attribute names

See Also:

• ServletContext.getAttribute(java.lang.String)

getContext

public ServletContext getContext(String uripath)

Description copied from interface: jakarta.servlet.ServletContext

Returns a ServletContext object that corresponds to a specified URL on the server.

This method allows servlets to gain access to the context for various parts of the server, and as needed obtain RequestDispatcher objects from the context. The given path must be begin with "/", is interpreted relative to the server's document root and is matched against the context roots of other web applications hosted on this container.

In a security conscious environment, the servlet container may return null for a given URL.

Specified by:

getContext in interface ServletContext

Parameters:

uripath - a String specifying the context path of another web application in the container.

Returns:

the ServletContext object that corresponds to the named URL, or null if either none exists or the container wishes to restrict this access.

See Also:

• RequestDispatcher

getContextPath

public String getContextPath()

Description copied from interface: jakarta.servlet.ServletContext

Return the main path associated with this context.

Specified by:

getContextPath in interface ServletContext

Returns:

The main context path

getInitParameter

public String getInitParameter(String name)

Description copied from interface: jakarta.servlet.ServletContext

Returns a String containing the value of the named context-wide initialization parameter, or null if the parameter does not exist.

This method can make available configuration information useful to an entire "web application". For example, it can provide a web site administrator's email address or the name of a system that holds critical data.

Specified by:

getInitParameter in interface ServletContext

Parameters:

name - a String containing the name of the parameter whose value is requested

Returns:

a String containing the value of the initialization parameter

See Also:

• ServletConfig.getInitParameter(java.lang.String)

getInitParameterNames

public Enumeration<String> getInitParameterNames()

Description copied from interface: jakarta.servlet.ServletContext

Returns the names of the context's initialization parameters as an Enumeration of String objects, or an empty Enumeration if the context has no initialization parameters.

Specified by:

getInitParameterNames in interface ServletContext

Returns:

an Enumeration of String objects containing the names of the context's initialization parameters

See Also:

• ServletConfig.getInitParameter(java.lang.String)

getMajorVersion

public int getMajorVersion()

Description copied from interface: jakarta.servlet.ServletContext

Returns the major version of the Java Servlet API that this servlet container supports. All implementations that comply with Version 6.0 must have this method return the integer 6.

Specified by:

getMajorVersion in interface ServletContext

Returns:

6

getMimeType

public String getMimeType(String file)

Description copied from interface: jakarta.servlet.ServletContext

Returns the MIME type of the specified file, or null if the MIME type is not known. The MIME type is determined by the configuration of the servlet container, and may be specified in a web application deployment descriptor. Common MIME types are "text/html" and "image/gif".

Specified by:

getMimeType in interface ServletContext

Parameters:

file - a String specifying the name of a file

Returns:

a String specifying the file's MIME type

getMinorVersion

public int getMinorVersion()

Description copied from interface: jakarta.servlet.ServletContext

Returns the minor version of the Servlet API that this servlet container supports. All implementations that comply with Version 6.0 must have this method return the integer 0.

Specified by:

getMinorVersion in interface ServletContext

Returns:

0

getNamedDispatcher

public RequestDispatcher getNamedDispatcher(String name)

Description copied from interface: jakarta.servlet.ServletContext

Returns a RequestDispatcher object that acts as a wrapper for the named servlet.

Servlets (and JSP pages also) may be given names via server administration or via a web application deployment descriptor. A servlet instance can determine its name using ServletConfig.getServletName().

This method returns null if the ServletContext cannot return a RequestDispatcher for any reason.

Specified by:

getNamedDispatcher in interface ServletContext

Parameters:

name - a String specifying the name of a servlet to wrap

Returns:

a RequestDispatcher object that acts as a wrapper for the named servlet, or null if the ServletContext cannot return a RequestDispatcher

See Also:

• RequestDispatcher
• ServletContext.getContext(java.lang.String)
• ServletConfig.getServletName()

getRealPath

public String getRealPath(String path)

Description copied from interface: jakarta.servlet.ServletContext

Returns a String containing the real path for a given virtual path. For example, the path "/index.html" returns the absolute file path on the server's filesystem would be served by a request for "http://host/contextPath/index.html", where contextPath is the context path of this ServletContext..

The real path returned will be in a form appropriate to the computer and operating system on which the servlet container is running, including the proper path separators. This method returns null if the servlet container cannot translate the virtual path to a real path for any reason (such as when the content is being made available from a .war archive).

Specified by:

getRealPath in interface ServletContext

Parameters:

path - a String specifying a virtual path

Returns:

a String specifying the real path, or null if the translation cannot be performed

getRequestDispatcher

public RequestDispatcher getRequestDispatcher(String path)

Description copied from interface: jakarta.servlet.ServletContext

Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path. A RequestDispatcher object can be used to forward a request to the resource or to include the resource in a response. The resource can be dynamic or static.

The pathname must begin with a "/" and is interpreted as relative to the current context root. Use getContext to obtain a RequestDispatcher for resources in foreign contexts. This method returns null if the ServletContext cannot return a RequestDispatcher.

Specified by:

getRequestDispatcher in interface ServletContext

Parameters:

path - a String specifying the pathname to the resource

Returns:

a RequestDispatcher object that acts as a wrapper for the resource at the specified path, or null if the ServletContext cannot return a RequestDispatcher

See Also:

• RequestDispatcher
• ServletContext.getContext(java.lang.String)

getResource

public URL getResource(String path)
                throws MalformedURLException

Description copied from interface: jakarta.servlet.ServletContext

Returns a URL to the resource that is mapped to a specified path. The path must begin with a "/" and is interpreted as relative to the current context root.

This method allows the servlet container to make a resource available to servlets from any source. Resources can be located on a local or remote file system, in a database, or in a .war file.

The servlet container must implement the URL handlers and URLConnection objects that are necessary to access the resource.

This method returns null if no resource is mapped to the pathname.

Some containers may allow writing to the URL returned by this method using the methods of the URL class.

The resource content is returned directly, so be aware that requesting a .jsp page returns the JSP source code. Use a RequestDispatcher instead to include results of an execution.

This method has a different purpose than java.lang.Class.getResource, which looks up resources based on a class loader. This method does not use class loaders.

Specified by:

getResource in interface ServletContext

Parameters:

path - a String specifying the path to the resource

Returns:

the resource located at the named path, or null if there is no resource at that path

Throws:

MalformedURLException - if the pathname is not given in the correct form

getResourceAsStream

public InputStream getResourceAsStream(String path)

Description copied from interface: jakarta.servlet.ServletContext

Returns the resource located at the named path as an InputStream object.

The data in the InputStream can be of any type or length. The path must be specified according to the rules given in getResource. This method returns null if no resource exists at the specified path.

Meta-information such as content length and content type that is available via getResource method is lost when using this method.

The servlet container must implement the URL handlers and URLConnection objects necessary to access the resource.

This method is different from java.lang.Class.getResourceAsStream, which uses a class loader. This method allows servlet containers to make a resource available to a servlet from any location, without using a class loader.

Specified by:

getResourceAsStream in interface ServletContext

Parameters:

path - a String specifying the path to the resource

Returns:

the InputStream returned to the servlet, or null if no resource exists at the specified path

getResourcePaths

public Set<String> getResourcePaths(String path)

Description copied from interface: jakarta.servlet.ServletContext

Returns a directory-like listing of all the paths to resources within the web application whose longest sub-path matches the supplied path argument. Paths indicating subdirectory paths end with a '/'. The returned paths are all relative to the root of the web application and have a leading '/'. For example, for a web application containing

/welcome.html
/catalog/index.html
/catalog/products.html
/catalog/offers/books.html
/catalog/offers/music.html
/customer/login.jsp
/WEB-INF/web.xml
/WEB-INF/classes/com.acme.OrderServlet.class,

getResourcePaths("/") returns {"/welcome.html", "/catalog/", "/customer/", "/WEB-INF/"}
getResourcePaths("/catalog/") returns {"/catalog/index.html", "/catalog/products.html", "/catalog/offers/"}.

Specified by:

getResourcePaths in interface ServletContext

Parameters:

path - the partial path used to match the resources, which must start with a /

Returns:

a Set containing the directory listing, or null if there are no resources in the web application whose path begins with the supplied path.

getServerInfo

public String getServerInfo()

Description copied from interface: jakarta.servlet.ServletContext

Returns the name and version of the servlet container on which the servlet is running.

The form of the returned string is servername/versionnumber. For example, the JavaServer Web Development Kit may return the string JavaServer Web Dev Kit/1.0.

The servlet container may return other optional information after the primary string in parentheses, for example, JavaServer Web Dev Kit/1.0 (JDK 1.1.6; Windows NT 4.0 x86).

Specified by:

getServerInfo in interface ServletContext

Returns:

a String containing at least the servlet container name and version number

getServletContextName

public String getServletContextName()

Description copied from interface: jakarta.servlet.ServletContext

Returns the name of this web application corresponding to this ServletContext as specified in the deployment descriptor for this web application by the display-name element.

Specified by:

getServletContextName in interface ServletContext

Returns:

The name of the web application or null if no name has been declared in the deployment descriptor.

log

public void log(String message)

Description copied from interface: jakarta.servlet.ServletContext

Writes the specified message to a servlet log file, usually an event log. The name and type of the servlet log file is specific to the servlet container.

Specified by:

log in interface ServletContext

Parameters:

message - a String specifying the message to be written to the log file

log

public void log(String message,
 Throwable exception)

Description copied from interface: jakarta.servlet.ServletContext

Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file. The name and type of the servlet log file is specific to the servlet container, usually an event log.

Specified by:

log in interface ServletContext

Parameters:

message - a String that describes the error or exception

exception - the Throwable error or exception

removeAttribute

public void removeAttribute(String name)

Description copied from interface: jakarta.servlet.ServletContext

Removes the attribute with the given name from the servlet context. After removal, subsequent calls to ServletContext.getAttribute(java.lang.String) to retrieve the attribute's value will return null.

If listeners are configured on the ServletContext the container notifies them accordingly.

Specified by:

removeAttribute in interface ServletContext

Parameters:

name - a String specifying the name of the attribute to be removed

setAttribute

public void setAttribute(String name,
 Object value)

Description copied from interface: jakarta.servlet.ServletContext

Binds an object to a given attribute name in this servlet context. If the name specified is already used for an attribute, this method will replace the attribute with the new to the new attribute.

If listeners are configured on the ServletContext the container notifies them accordingly.

If a null value is passed, the effect is the same as calling removeAttribute().

Attribute names should follow the same convention as package names. The Jakarta EE platform reserves names matching jakarta.*.

Specified by:

setAttribute in interface ServletContext

Parameters:

name - a String specifying the name of the attribute

value - an Object representing the attribute to be bound

addFilter

public FilterRegistration.Dynamic addFilter(String filterName,
 String className)

Description copied from interface: jakarta.servlet.ServletContext

Add filter to context.

Specified by:

addFilter in interface ServletContext

Parameters:

filterName - Name of filter to add

className - Name of filter class

Returns:

null if the filter has already been fully defined, else a FilterRegistration.Dynamic object that can be used to further configure the filter

addServlet

public ServletRegistration.Dynamic addServlet(String servletName,
 String className)

Description copied from interface: jakarta.servlet.ServletContext

Register a servlet implementation for use in this ServletContext.

Specified by:

addServlet in interface ServletContext

Parameters:

servletName - The name of the servlet to register

className - The implementation class for the servlet

Returns:

The registration object that enables further configuration

getDefaultSessionTrackingModes

public Set<SessionTrackingMode> getDefaultSessionTrackingModes()

Description copied from interface: jakarta.servlet.ServletContext

Obtains the default session tracking modes for this web application. By default SessionTrackingMode.URL is always supported, SessionTrackingMode.COOKIE is supported unless the cookies attribute has been set to false for the context and SessionTrackingMode.SSL is supported if at least one of the connectors used by this context has the attribute secure set to true.

Specified by:

getDefaultSessionTrackingModes in interface ServletContext

Returns:

The set of default session tracking modes for this web application

getEffectiveSessionTrackingModes

public Set<SessionTrackingMode> getEffectiveSessionTrackingModes()

Description copied from interface: jakarta.servlet.ServletContext

Obtains the currently enabled session tracking modes for this web application.

Specified by:

getEffectiveSessionTrackingModes in interface ServletContext

Returns:

The value supplied via ServletContext.setSessionTrackingModes(Set) if one was previously set, else return the defaults

getSessionCookieConfig

public SessionCookieConfig getSessionCookieConfig()

Specified by:

getSessionCookieConfig in interface ServletContext

Returns:

TODO

setSessionTrackingModes

public void setSessionTrackingModes(Set<SessionTrackingMode> sessionTrackingModes)

Description copied from interface: jakarta.servlet.ServletContext

Configures the available session tracking modes for this web application.

Specified by:

setSessionTrackingModes in interface ServletContext

Parameters:

sessionTrackingModes - The session tracking modes to use for this web application

addFilter

public FilterRegistration.Dynamic addFilter(String filterName,
 Filter filter)

Description copied from interface: jakarta.servlet.ServletContext

Add filter to context.

Specified by:

addFilter in interface ServletContext

Parameters:

filterName - Name of filter to add

filter - Filter to add

Returns:

null if the filter has already been fully defined, else a FilterRegistration.Dynamic object that can be used to further configure the filter

addFilter

public FilterRegistration.Dynamic addFilter(String filterName,
 Class<? extends Filter> filterClass)

Description copied from interface: jakarta.servlet.ServletContext

Add filter to context.

Specified by:

addFilter in interface ServletContext

Parameters:

filterName - Name of filter to add

filterClass - Class of filter to add

Returns:

null if the filter has already been fully defined, else a FilterRegistration.Dynamic object that can be used to further configure the filter

addServlet

public ServletRegistration.Dynamic addServlet(String servletName,
 Servlet servlet)

Description copied from interface: jakarta.servlet.ServletContext

Register a servlet instance for use in this ServletContext.

Specified by:

addServlet in interface ServletContext

Parameters:

servletName - The name of the servlet to register

servlet - The Servlet instance to register

Returns:

The registration object that enables further configuration

addServlet

public ServletRegistration.Dynamic addServlet(String servletName,
 Class<? extends Servlet> servletClass)

Description copied from interface: jakarta.servlet.ServletContext

Add servlet to the context.

Specified by:

addServlet in interface ServletContext

Parameters:

servletName - Name of servlet to add

servletClass - Class of servlet to add

Returns:

null if the servlet has already been fully defined, else a ServletRegistration.Dynamic object that can be used to further configure the servlet

addJspFile

public ServletRegistration.Dynamic addJspFile(String jspName,
 String jspFile)

Description copied from interface: jakarta.servlet.ServletContext

Add a JSP to the context.

Specified by:

addJspFile in interface ServletContext

Parameters:

jspName - The servlet name under which this JSP file should be registered

jspFile - The path, relative to the web application root, for the JSP file to be used for this servlet

Returns:

a ServletRegistration.Dynamic object that can be used to further configure the servlet

createFilter

public <T extends Filter> T createFilter(Class<T> c)
                                  throws ServletException

Description copied from interface: jakarta.servlet.ServletContext

Create a Filter instance using the given class. The instance is just created. No initialisation occurs.

Specified by:

createFilter in interface ServletContext

Type Parameters:

T - The type for the given class

Parameters:

c - The the class for which an instance should be created

Returns:

The created Filter instance.

Throws:

ServletException - If the Filter instance cannot be created

createServlet

public <T extends Servlet> T createServlet(Class<T> c)
                                    throws ServletException

Description copied from interface: jakarta.servlet.ServletContext

Create an Servlet instance using the given class. The instance is just created. No initialisation occurs.

Specified by:

createServlet in interface ServletContext

Type Parameters:

T - The type for the given class

Parameters:

c - The the class for which an instance should be created

Returns:

The created Servlet instance.

Throws:

ServletException - If the servlet instance cannot be created.

getFilterRegistration

public FilterRegistration getFilterRegistration(String filterName)

Description copied from interface: jakarta.servlet.ServletContext

TODO SERVLET3 - Add comments

Specified by:

getFilterRegistration in interface ServletContext

Parameters:

filterName - TODO

Returns:

TODO

getServletRegistration

public ServletRegistration getServletRegistration(String servletName)

Description copied from interface: jakarta.servlet.ServletContext

Obtain the details of the named servlet.

Specified by:

getServletRegistration in interface ServletContext

Parameters:

servletName - The name of the Servlet of interest

Returns:

The registration details for the named Servlet or null if no Servlet has been registered with the given name

setInitParameter

public boolean setInitParameter(String name,
 String value)

Description copied from interface: jakarta.servlet.ServletContext

Set the given initialisation parameter to the given value.

Specified by:

setInitParameter in interface ServletContext

Parameters:

name - Name of initialisation parameter

value - Value for initialisation parameter

Returns:

true if the call succeeds or false if the call fails because an initialisation parameter with the same name has already been set

addListener

public void addListener(Class<? extends EventListener> listenerClass)

Description copied from interface: jakarta.servlet.ServletContext

TODO SERVLET3 - Add comments

Specified by:

addListener in interface ServletContext

Parameters:

listenerClass - TODO

addListener

public void addListener(String className)

Description copied from interface: jakarta.servlet.ServletContext

TODO SERVLET3 - Add comments

Specified by:

addListener in interface ServletContext

Parameters:

className - TODO

addListener

public <T extends EventListener> void addListener(T t)

Description copied from interface: jakarta.servlet.ServletContext

TODO SERVLET3 - Add comments

Specified by:

addListener in interface ServletContext

Type Parameters:

T - TODO

Parameters:

t - TODO

createListener

public <T extends EventListener> T createListener(Class<T> c)
                                           throws ServletException

Description copied from interface: jakarta.servlet.ServletContext

TODO SERVLET3 - Add comments

Specified by:

createListener in interface ServletContext

Type Parameters:

T - TODO

Parameters:

c - TODO

Returns:

TODO

Throws:

ServletException - TODO

declareRoles

public void declareRoles(String... roleNames)

Description copied from interface: jakarta.servlet.ServletContext

Add to the declared roles for this ServletContext.

Specified by:

declareRoles in interface ServletContext

Parameters:

roleNames - The roles to add

getClassLoader

public ClassLoader getClassLoader()

Description copied from interface: jakarta.servlet.ServletContext

Get the web application class loader associated with this ServletContext.

Specified by:

getClassLoader in interface ServletContext

Returns:

The associated web application class loader

getEffectiveMajorVersion

public int getEffectiveMajorVersion()

Description copied from interface: jakarta.servlet.ServletContext

Obtain the major version of the servlet specification for which this web application is implemented.

Specified by:

getEffectiveMajorVersion in interface ServletContext

Returns:

The major version declared in web.xml

getEffectiveMinorVersion

public int getEffectiveMinorVersion()

Description copied from interface: jakarta.servlet.ServletContext

Obtain the minor version of the servlet specification for which this web application is implemented.

Specified by:

getEffectiveMinorVersion in interface ServletContext

Returns:

The minor version declared in web.xml

getFilterRegistrations

public Map<String,? extends FilterRegistration> getFilterRegistrations()

Specified by:

getFilterRegistrations in interface ServletContext

Returns:

TODO

getJspConfigDescriptor

public JspConfigDescriptor getJspConfigDescriptor()

Specified by:

getJspConfigDescriptor in interface ServletContext

Returns:

TODO

getServletRegistrations

public Map<String,? extends ServletRegistration> getServletRegistrations()

Description copied from interface: jakarta.servlet.ServletContext

Obtain a Map of servlet names to servlet registrations for all servlets registered with this context.

Specified by:

getServletRegistrations in interface ServletContext

Returns:

A Map of servlet names to servlet registrations for all servlets registered with this context

getVirtualServerName

public String getVirtualServerName()

Description copied from interface: jakarta.servlet.ServletContext

Get the primary name of the virtual host on which this context is deployed. The name may or may not be a valid host name.

Specified by:

getVirtualServerName in interface ServletContext

Returns:

The primary name of the virtual host on which this context is deployed

getSessionTimeout

public int getSessionTimeout()

Description copied from interface: jakarta.servlet.ServletContext

Get the default session timeout.

Specified by:

getSessionTimeout in interface ServletContext

Returns:

The current default session timeout in minutes

setSessionTimeout

public void setSessionTimeout(int sessionTimeout)

Description copied from interface: jakarta.servlet.ServletContext

Set the default session timeout. This method may only be called before the ServletContext is initialised.

Specified by:

setSessionTimeout in interface ServletContext

Parameters:

sessionTimeout - The new default session timeout in minutes.

getRequestCharacterEncoding

public String getRequestCharacterEncoding()

Description copied from interface: jakarta.servlet.ServletContext

Get the default character encoding for reading request bodies.

Specified by:

getRequestCharacterEncoding in interface ServletContext

Returns:

The character encoding name or null if no default has been specified

setRequestCharacterEncoding

public void setRequestCharacterEncoding(String encoding)

Description copied from interface: jakarta.servlet.ServletContext

Set the default character encoding to use for reading request bodies. Calling this method will over-ride any value set in the deployment descriptor.

Specified by:

setRequestCharacterEncoding in interface ServletContext

Parameters:

encoding - The name of the character encoding to use

getResponseCharacterEncoding

public String getResponseCharacterEncoding()

Description copied from interface: jakarta.servlet.ServletContext

Get the default character encoding for writing response bodies.

Specified by:

getResponseCharacterEncoding in interface ServletContext

Returns:

The character encoding name or null if no default has been specified

setResponseCharacterEncoding

public void setResponseCharacterEncoding(String encoding)

Description copied from interface: jakarta.servlet.ServletContext

Set the default character encoding to use for writing response bodies. Calling this method will over-ride any value set in the deployment descriptor.

Specified by:

setResponseCharacterEncoding in interface ServletContext

Parameters:

encoding - The name of the character encoding to use