Package de.businesscode.bcdui.web.servlets

Class StaticResourceServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

de.businesscode.bcdui.web.servlets.StaticResourceServlet

All Implemented Interfaces:

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

public class StaticResourceServlet
extends javax.servlet.http.HttpServlet

This class enables the use of the database-backed virtual file system and jar files as source for seemingly static resources. Normal static files are located on the filesystem within the webapps root, put there when the server extracts the app.war file. Static files are requested by /appContext/some/path/someFile.txt for example. This class makes files under such an address available, which really come from the database or a jar (and classpath in general) within the app.war instead. Main usage is the virtual file system and making BCD-UI static files like js and xslt available from bcd-ui-core.jar within app.war. The search order is: First vfs, then file system (on server this is normal file from the war), then jar files. Note: Since vfs caches the file list from the database (not the actual content), a lookup in vfs is no performance hit. <servlet> <servlet-name>staticResourceServlet</servlet-name> <servlet-class>de.businesscode.web.StaticResourceServlet</servlet-class> <init-param> <param-name>vfsFileExtensions</param-name> <!-- Extensions that can be overwritten in vfs --> <param-value>xml txt vfsxml pdf png gif jpg jpeg svg doc docx xls xlsx csv zip</param-value> </init-param> </servlet> <!-- Add any URL for the virtual file system here --> <servlet-mapping> <servlet-name>bcdui4.StaticResourceServlet</servlet-name> <url-pattern>/bcdui/*</url-pattern> <url-pattern>/vfs/*</url-pattern> <url-pattern>*.vfsxml</url-pattern> </servlet-mapping>

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	StaticResourceServlet.LocalResource	This class represents one single resource which is either a file on the file system or a URL from the classpath.
static interface	StaticResourceServlet.Resource	resource abstract descriptor implementing API to the content
static interface	StaticResourceServlet.ResourceProvider	provider interface to resolve a StaticResourceServlet.Resource
static class	StaticResourceServlet.StaticResourceProvider	a static resource provider singleton

Constructor Summary

Constructors

Constructor	Description
StaticResourceServlet()

Method Summary

Modifier and Type	Method	Description
protected void	doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)	Implementation of GET requests.
protected void	doPost(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
void	init(javax.servlet.ServletConfig config)

Methods inherited from class javax.servlet.http.HttpServlet

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

Methods inherited from class javax.servlet.GenericServlet

destroy, 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

Constructor Detail

StaticResourceServlet

public StaticResourceServlet()

Method Detail

init

public void init(javax.servlet.ServletConfig config)
          throws javax.servlet.ServletException

Specified by:

init in interface javax.servlet.Servlet

Overrides:

init in class javax.servlet.GenericServlet

Throws:

javax.servlet.ServletException

doGet

protected void doGet(javax.servlet.http.HttpServletRequest req,
                     javax.servlet.http.HttpServletResponse resp)
              throws javax.servlet.ServletException,
                     java.io.IOException

Implementation of GET requests.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

java.io.IOException

doPost

protected void doPost(javax.servlet.http.HttpServletRequest req,
                      javax.servlet.http.HttpServletResponse resp)
               throws javax.servlet.ServletException,
                      java.io.IOException

Overrides:

doPost in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

java.io.IOException