zeta.handler.statistic
Class AbstractHandler

java.lang.Object
  |
  +--zeta.handler.statistic.AbstractHandler

All Implemented Interfaces:

GetHandler

Direct Known Subclasses:

ActiveWorkUnitsHandler, CloseZerosHandler, LocationsHandler, OperatingSystemsHandler, StatisticOverviewHandler, TeamMembersHandler, Top1000ProducersHandler, Top100ProducersHandler, TopProducers24HoursHandler, TopProducers7DaysHandler, TopProducersHandler, TopTeamsHandler, WorkLoadTodayHandler, WorkstationsHandler

public abstract class AbstractHandler

extends java.lang.Object

implements GetHandler

Base handler to response a GET request for a specific statistic.

Nested Class Summary

(package private) class

AbstractHandler.InnerPageBuffer

Field Summary

private int	diffTimeImageUpdate Duration in milliseconds when the images should be new created.
private int	diffTimeInnerPageUpdate Duration in milliseconds when the HTML page should be new created.
private int	diffTimePageUpdate Duration in milliseconds when the HTML page should be new created.
private java.util.Map	imageBuffer Buffer containing the created images today.
protected static int	imgHeight Height of the created images.
protected static int	imgWidth Width of the created images.
private java.util.Map	lastImageUpdate Timestamp when the images are created.
private long	lastInnerPageUpdate Timestamp when the inner page is send to a client.
private long	lastPageUpdate Timestamp when the page is send to a client.
private java.lang.String	pageBuffer Buffer containing the HTML page.
protected ZetaServlet	servlet Servlet which owns this handler.
private static java.text.DateFormat	timeFormatter Format 'MM/dd/yyyy HH:mm:ss' to print current timestamp.
private long	timestampOfPage Timestamp when the inner page was generated.

Constructor Summary

AbstractHandler(ZetaServlet servlet, int diffTimeInnerPageUpdate, int diffTimePageUpdate, int diffTimeImageUpdate)

Method Summary

private void	appendMenu(java.lang.StringBuffer buffer) Append a menu on the left side of the HTML page.
private void	createCompletePage(javax.servlet.http.HttpServletRequest req) Creates HTML page with the content of a specified statistic.
java.awt.image.BufferedImage	createImage(java.sql.Connection con, java.lang.String imageName) Creates PNG image for a specified name which is defined in the HTML page.
abstract java.lang.String	createPage(java.sql.Connection con) Creates HTML page with the content of a specified statistic.
protected java.lang.String	createPage(javax.servlet.http.HttpServletRequest req, java.sql.Connection con) Creates HTML page with the content of a specified statistic.
void	doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp) Handles a GET request resp for the specified statistic.
java.lang.String	getBufferedPage(javax.servlet.http.HttpServletRequest req) Returns the buffered page.
int	getImageHeight(java.lang.String imageName) Determines the height of the image in the statistic page.
int	getImageWidth(java.lang.String imageName) Determines the width of the image in the statistic page.
AbstractHandler.InnerPageBuffer	getInnerPageBuffer() Returns the buffer containing the main inner HTML page (table).
int	getInnerPageExpiredDiffTime() Returns time difference when a web inner page expired.
int	getPageExpiredDiffTime() Returns time difference when a web page expired.
void	imageUpdateCompleted(java.lang.String imageName) Event when a new image was generated.
boolean	isImageExpired(java.lang.String imageName) Checks if the image of the web page should be updated.
boolean	isInnerPageExpired() Checks if the web inner page (table) should be updated.
boolean	isPageExpired() Checks if the web page should be updated.
void	pageUpdateCompleted() Event when a new web page was generated.

Methods inherited from class java.lang.Object

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

Field Detail

servlet

protected ZetaServlet servlet

Servlet which owns this handler.

timeFormatter

private static java.text.DateFormat timeFormatter

Format 'MM/dd/yyyy HH:mm:ss' to print current timestamp.

imgWidth

protected static final int imgWidth

Width of the created images.

See Also:

Constant Field Values

imgHeight

protected static final int imgHeight

Height of the created images.

See Also:

Constant Field Values

imageBuffer

private java.util.Map imageBuffer

Buffer containing the created images today.

lastImageUpdate

private java.util.Map lastImageUpdate

Timestamp when the images are created.

pageBuffer

private java.lang.String pageBuffer

Buffer containing the HTML page.

lastInnerPageUpdate

private long lastInnerPageUpdate

Timestamp when the inner page is send to a client.

lastPageUpdate

private long lastPageUpdate

Timestamp when the page is send to a client.

diffTimeInnerPageUpdate

private int diffTimeInnerPageUpdate

Duration in milliseconds when the HTML page should be new created.

diffTimePageUpdate

private int diffTimePageUpdate

Duration in milliseconds when the HTML page should be new created.

diffTimeImageUpdate

private int diffTimeImageUpdate

Duration in milliseconds when the images should be new created.

timestampOfPage

private long timestampOfPage

Timestamp when the inner page was generated.

Constructor Detail

AbstractHandler

public AbstractHandler(ZetaServlet servlet,
                       int diffTimeInnerPageUpdate,
                       int diffTimePageUpdate,
                       int diffTimeImageUpdate)

Parameters:

servlet - servlet which owns this handler.

diffTimePageUpdate - duration in milliseconds when the HTML page should be new created.

diffTimeImageUpdate - duration in milliseconds when the images should be new created.

Method Detail

createPage

public abstract java.lang.String createPage(java.sql.Connection con)
                                     throws java.sql.SQLException,
                                            javax.servlet.ServletException

Creates HTML page with the content of a specified statistic.

Parameters:

con - connection to the back-end database

Returns:

HTML page with the content of a specified statistic.

java.sql.SQLException

javax.servlet.ServletException

createPage

protected java.lang.String createPage(javax.servlet.http.HttpServletRequest req,
                                      java.sql.Connection con)
                               throws java.sql.SQLException,
                                      javax.servlet.ServletException

Creates HTML page with the content of a specified statistic.

Parameters:

req - GET request

con - connection to the back-end database

Returns:

HTML page with the content of a specified statistic.

java.sql.SQLException

javax.servlet.ServletException

createImage

public java.awt.image.BufferedImage createImage(java.sql.Connection con,
                                                java.lang.String imageName)
                                         throws java.sql.SQLException,
                                                javax.servlet.ServletException

Creates PNG image for a specified name which is defined in the HTML page. Default is null.

Parameters:

con - connection to the back-end database

imageName - name of the image

Returns:

PNG image for a specified name which is defined in the HTML page.

java.sql.SQLException

javax.servlet.ServletException

isImageExpired

public boolean isImageExpired(java.lang.String imageName)

Checks if the image of the web page should be updated.

Parameters:

imageName - name of the image

Returns:

true if the image of the web page should be updated.

isInnerPageExpired

public boolean isInnerPageExpired()

Checks if the web inner page (table) should be updated.

Returns:

true if the web page should be updated.

isPageExpired

public boolean isPageExpired()

Checks if the web page should be updated.

Returns:

true if the web page should be updated.

getInnerPageExpiredDiffTime

public int getInnerPageExpiredDiffTime()

Returns time difference when a web inner page expired.

Returns:

time difference when a web inner page expired.

getPageExpiredDiffTime

public int getPageExpiredDiffTime()

Returns time difference when a web page expired.

Returns:

time difference when a web page expired.

imageUpdateCompleted

public final void imageUpdateCompleted(java.lang.String imageName)

Event when a new image was generated.

Parameters:

imageName - name of the image

pageUpdateCompleted

public final void pageUpdateCompleted()

Event when a new web page was generated.

getInnerPageBuffer

public AbstractHandler.InnerPageBuffer getInnerPageBuffer()
                                                   throws javax.servlet.ServletException

Returns the buffer containing the main inner HTML page (table). The inner page buffer should be closed if it not used.

Returns:

inner page buffer

javax.servlet.ServletException

getBufferedPage

public java.lang.String getBufferedPage(javax.servlet.http.HttpServletRequest req)
                                 throws javax.servlet.ServletException

Returns the buffered page. Update the buffer if the web page is expired.

Parameters:

req - GET request

Returns:

buffered page

javax.servlet.ServletException

doGet

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

Handles a GET request resp for the specified statistic. The response resp contains either the HTML page or an image.

Specified by:

doGet in interface GetHandler

javax.servlet.ServletException

java.io.IOException

getImageWidth

public int getImageWidth(java.lang.String imageName)

Determines the width of the image in the statistic page.

Parameters:

imageName - name of the image

Returns:

the width of the image in the statistic page.

getImageHeight

public int getImageHeight(java.lang.String imageName)

Determines the height of the image in the statistic page.

Parameters:

imageName - name of the image

Returns:

the height of the image in the statistic page.

createCompletePage

private void createCompletePage(javax.servlet.http.HttpServletRequest req)
                         throws javax.servlet.ServletException

Creates HTML page with the content of a specified statistic.

Parameters:

req - GET request

Returns:

HTML page with the content of a specified statistic.

javax.servlet.ServletException

appendMenu

private void appendMenu(java.lang.StringBuffer buffer)

Append a menu on the left side of the HTML page.

Parameters:

buffer - buffer containing the HTML page.