Package digilib.servlet

Class Scaler

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

digilib.servlet.Scaler

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

@WebServlet(name="Scaler",
            urlPatterns={"/Scaler/*","/servlet/Scaler/*"},
            asyncSupported=true)
public class Scaler
extends javax.servlet.http.HttpServlet

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Scaler.ErrMsg	type of error message
static class	Scaler.Error	servlet error codes

Field Summary

Fields

Modifier and Type	Field	Description
protected static org.slf4j.Logger	accountlog	logger for accounting requests
protected static org.slf4j.Logger	authlog	logger for authentication related
protected AuthzOps	authzOp	AuthzOps instance
static Scaler.ErrMsg	defaultErrMsgType	default error message type
static File	denyImgFile	authentication error image file
protected DocuDirCache	dirCache	DocuDirCache instance
protected DigilibServletConfiguration	dlConfig	DigilibConfiguration instance
static File	errorImgFile	image error image file
protected DigilibJobCenter<DocuImage>	imageJobCenter	Image executor
protected static org.slf4j.Logger	logger	gengeral logger for this class
static File	notfoundImgFile	not found error image file
protected boolean	sendFileAllowed	send files as is?
protected boolean	useAuthorization	use authorization database
static String	version	digilib servlet version (for all components)

Constructor Summary

Constructors

Constructor	Description
Scaler()

Method Summary

Modifier and Type	Method	Description
static void	digilibError(Scaler.ErrMsg type, Scaler.Error error, String msg, javax.servlet.http.HttpServletResponse response)	Sends an error to the client as text or image.
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
protected void	doHead(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
protected void	doOptions(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
long	getLastModified(javax.servlet.http.HttpServletRequest request)	Returns modification time relevant to the request for caching.
static String	getVersion()
void	init(javax.servlet.ServletConfig config)	Initialisation on first run.
void	processRequest(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)	Service this request using the response.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doPut, doTrace, 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

Field Detail

version

public static final String version

digilib servlet version (for all components)

defaultErrMsgType

public static Scaler.ErrMsg defaultErrMsgType

default error message type

accountlog

protected static final org.slf4j.Logger accountlog

logger for accounting requests

logger

protected static final org.slf4j.Logger logger

gengeral logger for this class

authlog

protected static final org.slf4j.Logger authlog

logger for authentication related

dirCache

protected DocuDirCache dirCache

DocuDirCache instance

imageJobCenter

protected DigilibJobCenter<DocuImage> imageJobCenter

Image executor

denyImgFile

public static File denyImgFile

authentication error image file

errorImgFile

public static File errorImgFile

image error image file

notfoundImgFile

public static File notfoundImgFile

not found error image file

sendFileAllowed

protected boolean sendFileAllowed

send files as is?

dlConfig

protected DigilibServletConfiguration dlConfig

DigilibConfiguration instance

useAuthorization

protected boolean useAuthorization

use authorization database

authzOp

protected AuthzOps authzOp

AuthzOps instance

Constructor Detail

Scaler

public Scaler()

Method Detail

init

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

Initialisation on first run.

Specified by:

init in interface javax.servlet.Servlet

Overrides:

init in class javax.servlet.GenericServlet

Throws:

javax.servlet.ServletException

See Also:

Servlet.init(javax.servlet.ServletConfig)

getLastModified

public long getLastModified(javax.servlet.http.HttpServletRequest request)

Returns modification time relevant to the request for caching.

Overrides:

getLastModified in class javax.servlet.http.HttpServlet

See Also:

HttpServlet.getLastModified(javax.servlet.http.HttpServletRequest)

doGet

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

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

doPost

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

Overrides:

doPost in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

doHead

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

Overrides:

doHead in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException

doOptions

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

Overrides:

doOptions in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException

processRequest

public void processRequest(javax.servlet.http.HttpServletRequest request,
                           javax.servlet.http.HttpServletResponse response)
                    throws javax.servlet.ServletException

Service this request using the response.

Parameters:

request -

response -

Throws:

javax.servlet.ServletException

digilibError

public static void digilibError(Scaler.ErrMsg type,
                                Scaler.Error error,
                                String msg,
                                javax.servlet.http.HttpServletResponse response)

Sends an error to the client as text or image.

Parameters:

type -

error -

msg -

response -

getVersion

public static String getVersion()