org.apache.struts.action
Class ActionServlet

java.lang.Object
  |
  +--javax.servlet.GenericServlet
        |
        +--javax.servlet.http.HttpServlet
              |
              +--org.apache.struts.action.ActionServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

Direct Known Subclasses:

ActionComponentServlet

public class ActionServlet

extends javax.servlet.http.HttpServlet

ActionServlet represents the "controller" in the Model-View-Controller (MVC) design pattern for web applications that is commonly known as "Model 2". This nomenclature originated with a description in the JavaServerPages Specification, version 0.92, and has persisted ever since (in the absence of a better name).

Generally, a "Model 2" application is architected as follows:

• The user interface will generally be created with JSP pages, which will not themselves contain any business logic. These pages represent the "view" component of an MVC architecture.
• Forms and hyperlinks in the user interface that require business logic to be executed will be submitted to a request URI that is mapped to the controller servlet.
• There will be one instance of this servlet class, which receives and processes all requests that change the state of a user's interaction with the application. This component represents the "controller" component of an MVC architecture.
• The controller servlet will select and invoke an action class to perform the requested business logic.
• The action classes will manipulate the state of the application's interaction with the user, typically by creating or modifying JavaBeans that are stored as request or session attributes (depending on how long they need to be available). Such JavaBeans represent the "model" component of an MVC architecture.
• Instead of producing the next page of the user interface directly, action classes will generally use the RequestDispatcher.forward() facility of the servlet API to pass control to an appropriate JSP page to produce the next page of the user interface.

The standard version of ActionServlet implements the following logic for each incoming HTTP request. You can override some or all of this functionality by subclassing this servlet and implementing your own version of the processing.

• Identify, from the incoming request URI, the substring that will be used to select an action procedure.
• Use this substring to map to the Java class name of the corresponding action class (an implementation of the Action interface).
• If this is the first request for a particular action class, instantiate an instance of that class and cache it for future use.
• Optionally populate the properties of an ActionForm bean associated with this mapping.
• Call the execute method of this action class, passing on a reference to the mapping that was used (thereby providing access to the underlying ActionServlet and ServletContext, as well as any specialized properties of the mapping itself), and the request and response that were passed to the controller by the servlet container.

The standard version of ActionServlet is configured based on the following servlet initialization parameters, which you will specify in the web application deployment descriptor (/WEB-INF/web.xml) for your application. Subclasses that specialize this servlet are free to define additional initialization parameters. Several of these were deprecated between the 1.0 and 1.1 releases. The deprecated parameters are listed after the nominal parameters.

• config - Comma-separated list of context-relative path(s) to the XML resource(s) containing the configuration information for the default module. (Multiple files support since Struts 1.1) [/WEB-INF/struts-config.xml].
• config/${module} - Comma-separated list of Context-relative path(s) to the XML resource(s) containing the configuration information for the module that will use the specified prefix (/${module}). This can be repeated as many times as required for multiple modules. (Since Struts 1.1)
• convertNull - Force simulation of the Struts 1.0 behavior when populating forms. If set to true, the numeric Java wrapper class types (like java.lang.Integer) will default to null (rather than 0). (Since Struts 1.1) [false]
• rulesets - Comma-delimited list of fully qualified classnames of additional org.apache.commons.digester.RuleSet instances that should be added to the Digester that will be processing struts-config.xml files. By default, only the RuleSet for the standard configuration elements is loaded. (Since Struts 1.1)
• validating - Should we use a validating XML parser to process the configuration file (strongly recommended)? [true]

The following parameters may still be used with the Struts 1.1 release but are deprecated.

• application - Java class name of the application resources bundle base class. [NONE] DEPRECATED - Configure this using the "parameter" attribute of the <message-resources> element.
• bufferSize - The size of the input buffer used when processing file uploads. [4096] DEPRECATED - Configure this using the "bufferSize" attribute of the <controller> element.
• content - Default content type and character encoding to be set on each response; may be overridden by a forwarded-to servlet or JSP page. [text/html] DEPRECATED - Configure this using the "contentType" attribute of the <controller> element.
• debug - TThe debugging detail level that controls how much information is logged for this servlet. Accepts values 0 (off) and from 1 (least serious) through 6 (most serious). [0] DEPRECATED - Configure the logging detail level in your underlying logging implementation.
• factory - The Java class name of the MessageResourcesFactory used to create the application MessageResources object. [org.apache.struts.util.PropertyMessageResourcesFactory] DEPRECATED - Configure this using the "factory" attribute of the <message-resources> element.
• formBean - The Java class name of the ActionFormBean implementation to use [org.apache.struts.action.ActionFormBean]. DEPRECATED - Configure this using the "className" attribute of each <form-bean> element.
• forward - The Java class name of the ActionForward implementation to use [org.apache.struts.action.ActionForward]. Two convenient classes you may wish to use are:
  • org.apache.struts.action.ForwardingActionForward - Subclass of org.apache.struts.action.ActionForward that defaults the redirect property to false (same as the ActionForward default value).
  • org.apache.struts.action.RedirectingActionForward - Subclass of org.apache.struts.action.ActionForward that defaults the redirect property to true.
  DEPRECATED - Configure this using the "className" attribute of each <forward> element.
• locale - If set to true, and there is a user session, identify and store an appropriate java.util.Locale object (under the standard key identified by Globals.LOCALE_KEY) in the user's session if there is not a Locale object there already. [true] DEPRECATED - Configure this using the "locale" attribute of the <controller> element.
• mapping - The Java class name of the ActionMapping implementation to use [org.apache.struts.action.ActionMapping]. Two convenient classes you may wish to use are:
  • org.apache.struts.action.RequestActionMapping - Subclass of org.apache.struts.action.ActionMapping that defaults the scope property to "request".
  • org.apache.struts.action.SessionActionMapping - Subclass of org.apache.struts.action.ActionMapping that defaults the scope property to "session". (Same as the ActionMapping default value).
  DEPRECATED - Configure this using the "className" attribute of each <action> element, or globally for a module by using the "type" attribute of the <action-mappings> element.
• maxFileSize - The maximum size (in bytes) of a file to be accepted as a file upload. Can be expressed as a number followed by a "K" "M", or "G", which are interpreted to mean kilobytes, megabytes, or gigabytes, respectively. [250M] DEPRECATED - Configure this using the "maxFileSize" attribute of the <controller> element.
• multipartClass - The fully qualified name of the MultipartRequestHandler implementation class to be used for processing file uploads. If set to none, disables Struts multipart request handling. [org.apache.struts.upload.CommonsMultipartRequestHandler] DEPRECATED - Configure this using the "multipartClass" attribute of the <controller> element.
• nocache - If set to true, add HTTP headers to every response intended to defeat browser caching of any response we generate or forward to. [false] DEPRECATED - Configure this using the "nocache" attribute of the <controller> element.
• null - If set to true, set our application resources to return null if an unknown message key is used. Otherwise, an error message including the offending message key will be returned. [true] DEPRECATED - Configure this using the "null" attribute of the <message-resources> element.
• tempDir - The temporary working directory to use when processing file uploads. [The working directory provided to this web application as a servlet context attribute] DEPRECATED - Configure this using the "tempDir" attribute of the <controller> element.

Version:

$Revision: 1.1 $ $Date$

Author:

Craig R. McClanahan, Ted Husted, Martin Cooper, David Graham

See Also:

Serialized Form

Field Summary

protected java.lang.String	config Comma-separated list of context-relative path(s) to our configuration resource(s) for the default module.
protected org.apache.commons.digester.Digester	configDigester The Digester used to produce ModuleConfig objects from a Struts configuration file.
protected boolean	convertNull The flag to request backwards-compatible conversions for form bean properties of the Java wrapper class types.
protected org.apache.commons.collections.FastHashMap	dataSources The JDBC data sources that has been configured for this module, if any, keyed by the servlet context attribute under which they are stored.
protected int	debug Deprecated.
protected MessageResources	internal The resources object for our internal resources.
protected java.lang.String	internalName The Java base name of our internal resources.
protected static org.apache.commons.logging.Log	log Commons Logging instance.
protected RequestProcessor	processor The RequestProcessor instance we will use to process all incoming requests.
protected java.lang.String[]	registrations The set of public identifiers, and corresponding resource names, for the versions of the configuration file DTDs that we know about.
protected java.lang.String	servletMapping The URL pattern to which we are mapped in our web application deployment descriptor.
protected java.lang.String	servletName The servlet name under which we are registered in our web application deployment descriptor.

Fields inherited from class javax.servlet.http.HttpServlet

Constructor Summary

ActionServlet()

Method Summary

void	addServletMapping(java.lang.String servletName, java.lang.String urlPattern) Remember a servlet mapping from our web application deployment descriptor, if it is for this servlet.
private void	defaultControllerConfig(ModuleConfig config) Deprecated. Will be removed in a release after Struts 1.1.
private void	defaultFormBeansConfig(ModuleConfig config) Deprecated. Will be removed in a release after Struts 1.1.
private void	defaultForwardsConfig(ModuleConfig config) Deprecated. Will be removed in a release after Struts 1.1.
private void	defaultMappingsConfig(ModuleConfig config) Deprecated. Will be removed in a release after Struts 1.1.
private void	defaultMessageResourcesConfig(ModuleConfig config) Deprecated. Will be removed in a release after Struts 1.1.
void	destroy() Gracefully shut down this controller servlet, releasing any resources that were allocated at initialization.
protected void	destroyApplications() Deprecated. replaced by destroyModules()
protected void	destroyConfigDigester() Gracefully release any configDigester instance that we have created.
protected void	destroyDataSources() Deprecated. Will no longer be required with module support
protected void	destroyInternal() Gracefully terminate use of the internal MessageResources.
protected void	destroyModules() Gracefully terminate use of any modules associated with this application (if any).
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Process an HTTP "GET" request.
void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Process an HTTP "POST" request.
javax.sql.DataSource	findDataSource(java.lang.String key) Deprecated. Look up data sources directly in servlet context attributes
ActionFormBean	findFormBean(java.lang.String name) Deprecated. Replaced by ModuleConfig.findFormBeanConfig()
ActionForward	findForward(java.lang.String name) Deprecated. Replaced by ModuleConfig.findForwardConfig()
ActionMapping	findMapping(java.lang.String path) Deprecated. Replaced by ModuleConfig.findActionConfig()
protected ApplicationConfig	getApplicationConfig(javax.servlet.http.HttpServletRequest request) Deprecated. use getModuleConfig(HttpServletRequest)
int	getDebug() Deprecated. Configure the logging detail level in your underlying logging implementation
MessageResources	getInternal() Return the MessageResources instance containing our internal message strings.
protected ModuleConfig	getModuleConfig(javax.servlet.http.HttpServletRequest request) Return the module configuration object for the currently selected module.
protected RequestProcessor	getRequestProcessor(ModuleConfig config) Look up and return the RequestProcessor responsible for the specified module, creating a new one if necessary.
MessageResources	getResources() Deprecated. Actions should call Action.getResources(HttpServletRequest) instead of this method, in order to retrieve the resources for the current module.
private void	handleConfigException(java.lang.String paths, java.lang.Exception e) Simplifies exception handling in the parseModuleConfigFile() method.
void	init() Initialize this servlet.
protected ApplicationConfig	initApplicationConfig(java.lang.String prefix, java.lang.String path) Deprecated. use initModuleConfig(String,String)
protected void	initApplicationDataSources(ModuleConfig config) Deprecated. use initModuleDataSources(ModuleConfig)
protected void	initApplicationMessageResources(ModuleConfig config) Deprecated. use initModuleMessageResources()
protected void	initApplicationPlugIns(ModuleConfig config) Deprecated. use initModulePlugIns(ModuleConfig)
protected org.apache.commons.digester.Digester	initConfigDigester() Create (if needed) and return a new Digester instance that has been initialized to process Struts module configuraiton files and configure a corresponding ModuleConfig object (which must be pushed on to the evaluation stack before parsing begins).
protected void	initDataSources() Deprecated. Replaced by initApplicationDataSources() that takes an ModuleConfig argument. This method does nothing.
protected void	initInternal() Initialize our internal MessageResources bundle.
protected ModuleConfig	initModuleConfig(java.lang.String prefix, java.lang.String paths) Initialize the application configuration information for the specified module.
protected void	initModuleDataSources(ModuleConfig config) Initialize the data sources for the specified module.
protected void	initModuleMessageResources(ModuleConfig config) Initialize the application MessageResources for the specified module.
protected void	initModulePlugIns(ModuleConfig config) Initialize the plug ins for the specified module.
protected void	initOther() Initialize other global characteristics of the controller servlet.
protected void	initServlet() Initialize the servlet mapping under which our controller servlet is being accessed.
void	log(java.lang.String message, int level) Deprecated. Use commons-logging instead.
private void	parseModuleConfigFile(java.lang.String prefix, java.lang.String paths, ModuleConfig config, org.apache.commons.digester.Digester digester, java.lang.String path) Parses one module config file.
protected void	process(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Perform the standard request processing for this request, and create the corresponding response.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doOptions, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

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

Field Detail

config

protected java.lang.String config

Comma-separated list of context-relative path(s) to our configuration resource(s) for the default module.

configDigester

protected org.apache.commons.digester.Digester configDigester

The Digester used to produce ModuleConfig objects from a Struts configuration file.

Since:

Struts 1.1

convertNull

protected boolean convertNull

The flag to request backwards-compatible conversions for form bean properties of the Java wrapper class types.

Since:

Struts 1.1

dataSources

protected org.apache.commons.collections.FastHashMap dataSources

The JDBC data sources that has been configured for this module, if any, keyed by the servlet context attribute under which they are stored.

debug

protected int debug

Deprecated.

The debugging detail level for this servlet.

internal

protected MessageResources internal

The resources object for our internal resources.

internalName

protected java.lang.String internalName

The Java base name of our internal resources.

Since:

Struts 1.1

log

protected static org.apache.commons.logging.Log log

Commons Logging instance.

Since:

Struts 1.1

processor

protected RequestProcessor processor

The RequestProcessor instance we will use to process all incoming requests.

Since:

Struts 1.1

registrations

protected java.lang.String[] registrations

The set of public identifiers, and corresponding resource names, for the versions of the configuration file DTDs that we know about. There MUST be an even number of Strings in this list!

servletMapping

protected java.lang.String servletMapping

The URL pattern to which we are mapped in our web application deployment descriptor. FIXME - multiples???

servletName

protected java.lang.String servletName

The servlet name under which we are registered in our web application deployment descriptor.

Constructor Detail

ActionServlet

public ActionServlet()

Method Detail

destroy

public void destroy()

Gracefully shut down this controller servlet, releasing any resources that were allocated at initialization.

Specified by:

destroy in interface javax.servlet.Servlet

Overrides:

destroy in class javax.servlet.GenericServlet

init

public void init()
          throws javax.servlet.ServletException

Initialize this servlet. Most of the processing has been factored into support methods so that you can override particular functionality at a fairly granular level.

Overrides:

init in class javax.servlet.GenericServlet

Throws:

javax.servlet.ServletException - if we cannot configure ourselves correctly

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws java.io.IOException,
                  javax.servlet.ServletException

Process an HTTP "GET" request.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Parameters:

request - The servlet request we are processing

response - The servlet response we are creating

Throws:

java.io.IOException - if an input/output error occurs

javax.servlet.ServletException - if a servlet exception occurs

doPost

public void doPost(javax.servlet.http.HttpServletRequest request,
                   javax.servlet.http.HttpServletResponse response)
            throws java.io.IOException,
                   javax.servlet.ServletException

Process an HTTP "POST" request.

Overrides:

doPost in class javax.servlet.http.HttpServlet

Parameters:

request - The servlet request we are processing

response - The servlet response we are creating

Throws:

java.io.IOException - if an input/output error occurs

javax.servlet.ServletException - if a servlet exception occurs

addServletMapping

public void addServletMapping(java.lang.String servletName,
                              java.lang.String urlPattern)

Remember a servlet mapping from our web application deployment descriptor, if it is for this servlet.

Parameters:

servletName - The name of the servlet being mapped

urlPattern - The URL pattern to which this servlet is mapped

findDataSource

public javax.sql.DataSource findDataSource(java.lang.String key)

Deprecated. Look up data sources directly in servlet context attributes

Return a JDBC data source associated with this module, if any.

Parameters:

key - The servlet context attribute key under which this data source is stored, or null for the default.

findFormBean

public ActionFormBean findFormBean(java.lang.String name)

Deprecated. Replaced by ModuleConfig.findFormBeanConfig()

Return the form bean definition associated with the specified logical name, if any; otherwise return null.

Parameters:

name - Logical name of the requested form bean definition

findForward

public ActionForward findForward(java.lang.String name)

Deprecated. Replaced by ModuleConfig.findForwardConfig()

Return the forwarding associated with the specified logical name, if any; otherwise return null.

Parameters:

name - Logical name of the requested forwarding

findMapping

public ActionMapping findMapping(java.lang.String path)

Deprecated. Replaced by ModuleConfig.findActionConfig()

Return the ActionMapping for the specified path, for the default module.

Parameters:

path - Request path for which a mapping is requested

getDebug

public int getDebug()

Deprecated. Configure the logging detail level in your underlying logging implementation

Return the debugging detail level for this servlet.

getInternal

public MessageResources getInternal()

Return the MessageResources instance containing our internal message strings.

Since:

Struts 1.1

getResources

public MessageResources getResources()

Deprecated. Actions should call Action.getResources(HttpServletRequest) instead of this method, in order to retrieve the resources for the current module.

Return the application resources for the default module, if any.

log

public void log(java.lang.String message,
                int level)

Deprecated. Use commons-logging instead.

Log the specified message if the current debugging detail level for this servlet has been set to an equal or higher value. Otherwise, ignore this message.

Parameters:

message - Message to be logged

level - Debugging detail level of this message

destroyApplications

protected void destroyApplications()

Deprecated. replaced by destroyModules()

Gracefully terminate use of any modules associated with this application (if any).

Since:

Struts 1.1

destroyModules

protected void destroyModules()

Gracefully terminate use of any modules associated with this application (if any).

Since:

Struts 1.1

destroyConfigDigester

protected void destroyConfigDigester()

Gracefully release any configDigester instance that we have created.

Since:

Struts 1.1

destroyDataSources

protected void destroyDataSources()

Deprecated. Will no longer be required with module support

Gracefully terminate use of the data source associated with this application (if any).

destroyInternal

protected void destroyInternal()

Gracefully terminate use of the internal MessageResources.

getApplicationConfig

protected ApplicationConfig getApplicationConfig(javax.servlet.http.HttpServletRequest request)

Deprecated. use getModuleConfig(HttpServletRequest)

Return the module configuration object for the currently selected module.

Parameters:

request - The servlet request we are processing

Since:

Struts 1.1

getModuleConfig

protected ModuleConfig getModuleConfig(javax.servlet.http.HttpServletRequest request)

Return the module configuration object for the currently selected module.

Parameters:

request - The servlet request we are processing

Since:

Struts 1.1

getRequestProcessor

protected RequestProcessor getRequestProcessor(ModuleConfig config)
                                        throws javax.servlet.ServletException

Look up and return the RequestProcessor responsible for the specified module, creating a new one if necessary.

Parameters:

config - The module configuration for which to acquire and return a RequestProcessor.

Throws:

javax.servlet.ServletException - if we cannot instantiate a RequestProcessor instance

Since:

Struts 1.1

initApplicationConfig

protected ApplicationConfig initApplicationConfig(java.lang.String prefix,
                                                  java.lang.String path)
                                           throws javax.servlet.ServletException

Deprecated. use initModuleConfig(String,String)

Initialize the application configuration information for the specified module.

Parameters:

prefix - Module prefix for this module

path - Context-relative resource path for this modules's configuration resource

Throws:

javax.servlet.ServletException - if initialization cannot be performed

Since:

Struts 1.1

initModuleConfig

protected ModuleConfig initModuleConfig(java.lang.String prefix,
                                        java.lang.String paths)
                                 throws javax.servlet.ServletException

Initialize the application configuration information for the specified module.

Parameters:

prefix - Module prefix for this module

paths - Comma-separated list of context-relative resource path(s) for this modules's configuration resource(s)

Throws:

javax.servlet.ServletException - if initialization cannot be performed

Since:

Struts 1.1

parseModuleConfigFile

private void parseModuleConfigFile(java.lang.String prefix,
                                   java.lang.String paths,
                                   ModuleConfig config,
                                   org.apache.commons.digester.Digester digester,
                                   java.lang.String path)
                            throws javax.servlet.UnavailableException

Parses one module config file.

Parameters:

prefix -

paths -

config -

digester - Digester instance that does the parsing

path - The path to the config file to parse.

Throws:

javax.servlet.UnavailableException

handleConfigException

private void handleConfigException(java.lang.String paths,
                                   java.lang.Exception e)
                            throws javax.servlet.UnavailableException

Simplifies exception handling in the parseModuleConfigFile() method.

Parameters:

paths -

e -

Throws:

javax.servlet.UnavailableException

initApplicationDataSources

protected void initApplicationDataSources(ModuleConfig config)
                                   throws javax.servlet.ServletException

Deprecated. use initModuleDataSources(ModuleConfig)

Initialize the data sources for the specified module.

Parameters:

config - ModuleConfig information for this module

Throws:

javax.servlet.ServletException - if initialization cannot be performed

Since:

Struts 1.1

initModuleDataSources

protected void initModuleDataSources(ModuleConfig config)
                              throws javax.servlet.ServletException

Initialize the data sources for the specified module.

Parameters:

config - ModuleConfig information for this module

Throws:

javax.servlet.ServletException - if initialization cannot be performed

Since:

Struts 1.1

initApplicationPlugIns

protected void initApplicationPlugIns(ModuleConfig config)
                               throws javax.servlet.ServletException

Deprecated. use initModulePlugIns(ModuleConfig)

Initialize the plug ins for the specified module.

Parameters:

config - ModuleConfig information for this module

Throws:

javax.servlet.ServletException - if initialization cannot be performed

Since:

Struts 1.1

initModulePlugIns

protected void initModulePlugIns(ModuleConfig config)
                          throws javax.servlet.ServletException

Initialize the plug ins for the specified module.

Parameters:

config - ModuleConfig information for this module

Throws:

javax.servlet.ServletException - if initialization cannot be performed

Since:

Struts 1.1

initApplicationMessageResources

protected void initApplicationMessageResources(ModuleConfig config)
                                        throws javax.servlet.ServletException

Deprecated. use initModuleMessageResources()

Initialize the application MessageResources for the specified module.

Parameters:

config - ModuleConfig information for this module

Throws:

javax.servlet.ServletException - if initialization cannot be performed

Since:

Struts 1.1

initModuleMessageResources

protected void initModuleMessageResources(ModuleConfig config)
                                   throws javax.servlet.ServletException

Initialize the application MessageResources for the specified module.

Parameters:

config - ModuleConfig information for this module

Throws:

javax.servlet.ServletException - if initialization cannot be performed

Since:

Struts 1.1

initConfigDigester

protected org.apache.commons.digester.Digester initConfigDigester()
                                                           throws javax.servlet.ServletException

Create (if needed) and return a new Digester instance that has been initialized to process Struts module configuraiton files and configure a corresponding ModuleConfig object (which must be pushed on to the evaluation stack before parsing begins).

Throws:

javax.servlet.ServletException - if a Digester cannot be configured

Since:

Struts 1.1

initDataSources

protected void initDataSources()
                        throws javax.servlet.ServletException

Deprecated. Replaced by initApplicationDataSources() that takes an ModuleConfig argument. This method does nothing.

Initialize data sources for the default module. This method signature is maintained only for backwards compatibility, and will be removed in a subsequent release.

javax.servlet.ServletException

initInternal

protected void initInternal()
                     throws javax.servlet.ServletException

Initialize our internal MessageResources bundle.

Throws:

javax.servlet.ServletException - if we cannot initialize these resources

initOther

protected void initOther()
                  throws javax.servlet.ServletException

Initialize other global characteristics of the controller servlet.

Throws:

javax.servlet.ServletException - if we cannot initialize these resources

initServlet

protected void initServlet()
                    throws javax.servlet.ServletException

Initialize the servlet mapping under which our controller servlet is being accessed. This will be used in the &html:form> tag to generate correct destination URLs for form submissions.

Throws:

javax.servlet.ServletException - if error happens while scanning web.xml

process

protected void process(javax.servlet.http.HttpServletRequest request,
                       javax.servlet.http.HttpServletResponse response)
                throws java.io.IOException,
                       javax.servlet.ServletException

Perform the standard request processing for this request, and create the corresponding response.

Parameters:

request - The servlet request we are processing

response - The servlet response we are creating

Throws:

java.io.IOException - if an input/output error occurs

javax.servlet.ServletException - if a servlet exception is thrown

defaultControllerConfig

private void defaultControllerConfig(ModuleConfig config)

Deprecated. Will be removed in a release after Struts 1.1.

Perform backwards-compatible configuration of the default module's controller configuration from servlet initialization parameters (as were used in Struts 1.0).

Parameters:

config - The ModuleConfig object for the default module

Since:

Struts 1.1

defaultFormBeansConfig

private void defaultFormBeansConfig(ModuleConfig config)

Deprecated. Will be removed in a release after Struts 1.1.

Perform backwards-compatible configuration of an ActionFormBeans collection, and expose it as a servlet context attribute (as was used in Struts 1.0). Note that the current controller code does not (and should not) reference this attribute for any reason.

Parameters:

config - The ModuleConfig object for the default app

Since:

Struts 1.1

defaultForwardsConfig

private void defaultForwardsConfig(ModuleConfig config)

Deprecated. Will be removed in a release after Struts 1.1.

Perform backwards-compatible configuration of an ActionForwards collection, and expose it as a servlet context attribute (as was used in Struts 1.0). Note that the current controller code does not (and should not) reference this attribute for any reason.

Parameters:

config - The ModuleConfig object for the default app

Since:

Struts 1.1

defaultMappingsConfig

private void defaultMappingsConfig(ModuleConfig config)

Deprecated. Will be removed in a release after Struts 1.1.

Perform backwards-compatible configuration of an ActionMappings collection, and expose it as a servlet context attribute (as was used in Struts 1.0). Note that the current controller code does not (and should not) reference this attribute for any reason.

Parameters:

config - The ModuleConfig object for the default app

Since:

Struts 1.1

defaultMessageResourcesConfig

private void defaultMessageResourcesConfig(ModuleConfig config)

Deprecated. Will be removed in a release after Struts 1.1.

Perform backwards-compatible configuration of the default module's message resources configuration from servlet initialization parameters (as were used in Struts 1.0).

Parameters:

config - The ModuleConfig object for the default module

Since:

Struts 1.1