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tothelogfile.Thiswillslowtheserverdown.Thedefaultlog-levelisinfo,whichwilllogmostuseractions(usually
one per screen). . This level does not cause e much performance loss. . If your server is operating under extreme
conditions(lotsofauthorsandrespondentsusingtheserveratthesametime),theremightbealittleperformance
gainbysettinglog-leveltowarning.Notethatloggingatinfo-levelisusuallyveryhelpfulfortheOpiniosupport
staffwhendiagnosingproblems,enablingthemtoseethehistoryofactionsleadingtotheproblem.SeeLogfilefor
moreinformationaboutthelogfilesettings.
TheOpiniologfile
Thelogfileisveryhelpfultodiagnoseproblems.Opiniowilllogmessagestothelogfilewithinformationabout
useractions andothereventsinthesystem.Byconfiguringthelogfileproperties, loggingcanbesettovarious
levels,forspecificmodules.
Thelogconfigurationfileis[opinio-home]/WEB-INF/log4j.properties
Thelogfilesarelocatedinthe[opinio-home]/WEB-INF/logfolder.Thereareupto5logfiles,calledopinio.log,
opinio.log2, .., opinio.log5. . The e size, , number, , name and d location of these files can be changed by editing the
propertiesinthelog4j.propertiesfile.
Forfurtherdetails about the logfile, viewthe file witha texteditor(Notepad, forexample). It contains many
settings,withexplanationsforeachsetting.
Averyusefulfeatureoftheloggingmoduleiserrorreportingbyemail.SeeEmailreportappender.
Applicationmaintenance
Toensuresmoothoperationatalltimes,theapplicationshouldbemaintainedproperly.Themaintenancerequired
forOpinioisinmostcasesverylittle.Thefollowingitemsarerecommendedtowatchatregularintervals.Themore
usageyourapplicationhandles,themoreimportantisthemaintenance.
• Monitorthelogfile.Itishelpfultomonitorthisfileforanysignsofproblems.SeeLogfilefordetails.
• Monitoring current t system m status. Access page http://server-address/opinio/admin/sys.do o to see the current
systemstatus.Thepagewillreportifsystemisupandifdatabaseconnectioncanbeestablished.Thispagecan
beusedforuptimemonitoring.
• Manageyourdatabase. Asmoothoperationofyourdatabaseisofparamountimportanceforthestabilityof
Opinio.Opinioreliesonastabledatabase.Makefrequentbackupsofthedatabase.Refertothedocumentationof
thedatabaseyouarerunningformoreinformation.
• Makefrequentbackups.MakebackupsoftheentireOpiniofolderstructure.Preferablybackupswithhistory,so
thatthestateoftheapplicationcanberolledbackintimetofixproblems,lookatlogfilesetc.
• Monitoryourserver.Monitoryourserverforpotentialproblems,suchasmemoryusage,diskusage,network
bandwidthusage,processorusage,etc.Needlesstosay,Opinioreliesonastableserver.
Emailreportappender
Itis possible to o activate an emailreport handler if youwantmoreadvanced reportingthanis s providedbythe
reportingfeatureaccessiblethroughtheOpiniosetupscreen.Whenactivated,theappendercanreportalltypesof
events,notjustdatabaseconnectionerrors.Alleventswrittentothelogwilltriggertheappendertocheckifyou
shouldbenotified.Thefeatureisconfigurablebysettingtheemailreportappenderattributesinthelog4jproperties
file(opinio/WEB-INF/log4j.properties).
log4j.propertiesconfiguration:
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1. InvoketheemailappenderbyaddingittotherootLoggerattributeatthetopofthefile:
log4j.rootLogger=info,R,emailReport
2. UncommenttheemailReportattributes.Onlyuncommenttheusernameandpasswordattributesifmailserver
requiresauthentication.
3. Settheoptions:
• Settoandfromaddressandmailserver:
log4j.appender.emailReport.From=<fromaddress>
log4j.appender.emailReport.To=<toaddress>
log4j.appender.emailReport.SMTPHost=<mailserver>
• Settriggeringlevel.ThedefaultisERRORwhichtriggersonerrorandfatalevents.Anotherrecommended
levelisFATALwhichonlytriggers onthecriticalerrors.Whenatriggeringeventoccurs,theappender
checksifareportshouldbesendbyemail.Whetheranemailissendornotisaffectedbythetimeinterval
sincelasterrormailandtheintervalattribute.
log4j.appender.emailReport.triggeringLevel=ERROR
• Setminimumintervalbetweenmailsinminutes.Amailwillbesentonthefirstoccurrenceofatriggering
event.Thenanewmailwillnotbesentbeforetheintervaltimehaselapsed.Eventsoccurringduringthe
intervalperiodarestoredinaqueuesystem.Thefirsttriggeringeventthathappensaftertheintervalhas
elapsedincludestheeventsfromthequeue.Thequeuecontainsthefivefirstandfivelasteventsreportedin
thatperiod.Iftheintervalissetto60,thedefault,youwillreceivemaximumoneemailperhour.
log4j.appender.emailReport.interval=60
• Setlayout:Thelayoutcanbeconfiguredaccordingtothelog4jmanual,butitisrecommendedtokeepthe
defaults.
log4j.appender.emailReport.layout=org.apache.log4j.PatternLayout
log4j.appender.emailReport.layout.conversionPattern=%d%-5p[%-10t]%c{2}-%m%n
• Setauthenticationdetailsifyouremailserversrequiresauthentication.Onlyuncommenttheseattributesifit
isneeded.
log4j.appender.emailReport.UserName=<mailserverusername>
log4j.appender.emailReport.Password=<mailserverpassword>
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Chapter13.Appendix
Thischapterdescribesafewissuesthatareusefulinvariousplacesinthesystem.
Pre-populationformat
Pre-populationmakesitpossibletofilloutresponsestoquestionsbeforetherespondentviewsthesurveyform.Itis
possibletousepre-populationbyaddingparameterstothesurveyURLorbyaddingattributetoinviteedata.Both
URLsandinviteedatausethesameformat.
Allpre-populatedresponsesarebasedonparametersnameandparametervaluepairs.Theparameternameidentifies
whichquestiontopre-populateandthevaluespecifiestheresponse.Theformatofthevaluedefineshowtopopulate
amulti-valueresponse(forexampleamultiplechoiceoramatrixquestion).
Parameternameandvalueformat:
• Rating:
Examples:
pre_q1=2
Description:
Theratingparameterhasasinglevalue.N/Ahasthevalue0.
Thegeneralformatforratingquestiontypeis:
pre_q[question_number]=[value]
• Multiplechoice:
Examples:
Multiple selection off: pre_q1=4
Multiple selection on: pre_q2=1-3-5
Multiple selection on: pre_q3=1-3-5(othertext)
Description:
The multiple choicequestiontype canhave multiple selection on oroff. Whenmultiple selection is offthe
parametercanhaveonlyonevalue,otherwiseitcanhavemultiplevaluesseparatedby“-”.Topre-populatethe
“other”field,addtextinparentheses.“Other”fieldcanonlybeusedwiththelastchoice.Ifsomeofthetext
valuecontainsthe“-”characteritmustbeprecededby“'”escapecharacter(singlequote).
Thegeneralformatformultiplechoicefieldsis:
pre_q[question_number]=[indexvalue-indexvalue-indexvalue-...-indexvalue(othertext)]
• Numeric:
Examples:
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Integer: pre_q1=100
Decimal: pre_q2=5.75
Description:
Numericvaluecanbeintegerordecimal.Therecanbeonlyonevalueforthisparametertype.
Thegeneralformatfornumericquestiontypeis:
pre_q[question_number]=[value]
• Dropdown:
Examples:
pre_q1=itemtext
pre_q2=itemtext1-itemtext4
Description:
Thedropdownquestiontypecanhavemultipleselectiononoroff.Whenmultipleselectionisofftheparameter
canhaveonlyonevalue, otherwiseitcanhavemultiplevaluesseparatedby“-”.Thepre-populatedtextmust
matchthedropdownitemvalue,notthelabel.
Thegeneralformatfordropdownquestiontypeparameteris:
pre_q[question_number]=[itemvalue-itemvalue-itemvalue-...]
• Matrix:
Examples:
Rating matrix x group p type: pre_q1=2-1--3
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Ranking matrix x group type: pre_q1=3-2-4-1
Intersection matrix x group type: pre_q1=7
Any cell matrix x group type: : pre_q1=1010001101001011
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Advanced matrix: : pre_q1=010011110101-3-1-2-30-F-1
Description:
Amatrixmaycontainmanyinputvaluesandtypes.Eachvalueisseparatedby“-”.Thenumberofparametersis
thesameasthenumberofinputvalues.Cellswithnoinputareemptycell,labels,images.Forexample,atext
field,dropdownlist,checkboxoraratingvalueareallinputtypes.Thematrixinputfieldsaretraversedfromtop-
lefttobottom-right,withtheexceptionofcellgroups.Theyaretraversedindependentlylikeamatrixwithinthe
matrix.Thenumberofvalueswithinagroupdependsonthetype.Ratingandrankinghasoneindexvalueper
row,intersectionhasasingleindexvalue,agroupwithcheckboxeshasa0or1valuepercell.Ifnovaluesare
specifiedforsomecells,separatorsmuststillexist.
Thegeneralformatformatrixis:
pre_q[question_number]=[value-value-value-...]
(valuerepresentsacellorgroupvalue)
• In-textfields:
Examples:
Text field: pre_q1_intxt=mytext
Numeric field integer: pre_q2_intxt=20
Numeric field decimal: pre_q3_intxt=17.45
Dropdown list: : pre_q4_intxt=itemtext
Checkbox: pre_q5_intxt=1
Multiple values: : pre_q6_intxt=mytext-20-17.45-itemtext-1
Description:
Therecanbeunlimitednumberofin-textfieldsperquestion.Eachvalueisseparatedby“-”.Ifsomeofthetext
valuecontainsthe“-”characteritmustbeprecededby“'”escapecharacter(singlequote).
Thegeneralformatforintextfieldsis:
pre_q[question_number]_intxt=[value-value-value-...]
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• Freetext:
Example:
pre_q1_ftxt=mytext
Description:
Asingletextvalueonlycanbespecifiedperquestionforthefreetextinputbox.
Thegeneralformatforfreetextis:
pre_q[question_number]_ftxt=[text]
Alltextvaluesforallinputtypesmightcontainthevalueseparator“-”.TopreventOpiniointerpretingthisasavalue
separator,itcanbeescapedbyasinglequoteprecedingit.
Theformatdescribedaboveisforpre-populationusingURLparameters.SomecharactersarenotvalidinaURL,
becausetheyarereservedasspecialURLcharacters.Examplesare/,?,&,#.Inordertogetaroundthisproblemall
URL parameters must beURL-encoded. See Wikipedia[http://en.wikipedia.org/wiki/Percent-encoding]formore
information.
Pre-populationcanalsobedoneusinginvitationsandcustomdata.ExampleofaCSVfileforimportinginvitees:
email, pre_q1, pre_q2, , pre_q2_ftxt
myemail@mail.com, 2, , 1, , mytext
youremail@mail.com, 4, , 3, , yourtext
heremail@mail.com, 8, , 6, hertext
Asyoucanseetheparameternamesarespecifiedinthefirstlineandthevaluesarefromthesecondline.Theformat
ofeachvalueisthesameasforURLparameters.
Usingthis format, itis possibletopre-populatethe surveyformwithindividual valuesperrespondent. Seethe
sectioncalled“Inviteedataformat”formoreinformationontheinviteeformat.
Colorcodes
It'sprettyeasytounderstandthewordcolorcodes,butthosehexcodesareratherstrange.Here'saquickexplanation.
The threeprimarycolors arered, blue, andyellow. They're called theprimarycolors becausethere are no two
"lesser"colorsthatmakethemup.Purpleisnotaprimarycolorbecauseitcanbecreatedthroughcombiningequal
partsofblueandred.
Intheworldofmechanicalthingsthatmakecolor,likeatelevision,oracomputerscreen,coloriscreatedthrough
themixingofthreebasiccolorstomakeothercolors.It'saprocessknownas"additivecolor".
YouwouldthinkthattheTVsandcomputermonitorsoftheworldwouldsimplyusethethreeprimarycolortostart
with,butnothinginlifecanjustbethateasy.Thethreecolorsusedtostartadditivecolormixingarered,green,and
blue.Why,youask?Becausebystartingwithonecompositecolor,green,youcanstillcreateyellowbecauseit's
containedinthegreen.Inaddition,nowyouareactuallystartingwithfourcolors,red,green,blue,andyellow.Stay
withmehere...
Togoon,Ineedtoexplainasecondprocessofworkingwithcolors,"subtractivecolor."Subtractivecoloristhe
conceptofcombiningcolorstomakeanother,likemixingredandbluepainttogetpurple.Thatmaysoundslike
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additivecolor, butinreality, colorsaremade bysubtractingahueoutofthe colorschemebyaddingmoreof
another.Addingmorewhitetoblackmakesitmoresilversubtractingmoreblackasmorewhiteismixedin.
Oneotherbigdifferencebetweenadditiveandsubtractivecolor,andthisisthekey,iswhatyougetwhenyouadd
themalltogether.
Ifyouaddallthecolorstogetherinasubtractivecolormethod,yougetblack.Why?Becauseyouaddedthemall
togetherandallthosecolorssubtractedfromalltheothersleavingnosetcolor...orblack.
Acomputer,ontheotherhand,workswithlight,notpaintoranyothergoofystuff.Mixacomputer'sadditivecolors,
red,green,andblue,together,yougetwhite.
Nokidding,youreallydo. Shineawhitelightataprismoraleadcrystalglass.You'llgetarainbowofcolors.
Actually, that'showarainbowiscreated.Whitelightisbeingshownthroughwaterintheair.Thatseparatesthe
whitelightintothe"rainbow"ofcolors.
Nowontothe6-digitrepresentationofcolorknownasthehexcode.
BasicHexadecimalNotation:
Hexnumbersuse16digits:0123456789ABCDEF
Zero,"0",isthesmallestrepresentationsofacolor.It'salmostthetotalabsenceofcolor.Fis15timestheintensity
ofthecolorof0. Combinationsofthesedigitscreatedifferentshadesofaparticularcolor.DoubleZero,"00,"is
equaltozerohue.FFisequaltoapurecolor.
Thiscolorrepresentationisdonethreetimes,onceforred,onceforgreen,andonceforblue,inthatorder.Putthe
three,two-digit,codestogetherandyougeta6-digithexcode.Thehexcodeisjustarepresentationofthered,green,
andblueintensity,inthatorder.Thecomputercreatesthethreeintensities, mashesthemtogether,andyougeta
singleshadeofcolor.
Foranexample,herearetheoppositeendsofthecolorscale:
FFFFFF
Thecodeaboveisequaltowhite.Why?NoticethethreecolorsareallsettoFF.Thatmeansthehighestlevelofred,
green,andblue.AsIsaidabove,inacomputer,ortelevision,thecombinationofallthreeprimarycolorscreates
white.Nowhere'sblack:
000000
Thisisjusttheopposite.Allthreesettingsofred,green,andbluearesettoatotalabsenceofcolor.Black.
Now,hereareafewothercodesandtheirbreakdown:
FFFF00
Let'sstartwiththeconcernfromupabove,yellow.Thecodeaboveproducespureyellow.Noticetheredandthe
greenareatfulltilt.Thereisnoblue.Bymashingtheredandgreenupagainsteachother,theredcancelsoutthe
blueandallthatisleftistheyellow.It'sactuallyasubtractivecolormethodbeingemployedinanadditiveworld.
DC143C
Thecodeabovecreatesashadeofredcalled"crimson."Theredsetting, DC,isprettyintense.There'snotmuch
green.Blueissetalittlelessthanhalfwayup.
EE82EE
That'sviolet.TheRedandtheBlueareatprettyhighlevels.Thegreenisthere,butatalowerlevel.Now,thisisnot
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purple,butviolet.Purple,asIsaidabove,isacombinationofredandbluealone.Thecodeis800080.Noticethere's
nogreenatall.Justanequalamountofredandblue.
FFA500
That'sorange.There'slotsofred,notquiteanequallevelofgreen,andnoblue.
That'showthehexcodeswork.Thislessonprobablywon'tmakeyouanexpertincolorcreation,butatleastyou'll
beabletounderstandthecreationofcolorinacomputer.
So,aretheremorehexcodecolorsthatwhatIshowabove?Oh,yes.Therearethousandsuponthousandscovering
everycolorinthescalefrompureblacktopurewhite.Everytimeyouchangeevenoneofthered,green,orblue
levels,youchangethecolor.
Htmlhelp
YoucancustomizethelookofyoursurveysbyaddingyourownHTMLcodetothequestiontext,surveydescription
etc. Most t HTML codescanbeused,except thestartandendtags ofanHTMLdocument. . Youcodemustnot
includethefollowing:
<HTML>
<HEAD>
<TITLE>A title</TITLE>
</HEAD>
<BODY>
... and ...
</BODY>
</HTML>
Examples:
<b>Thistextisemphasized(bold)</b>
<hr>(horizontalline)
<fontcolor="red">Thistextwillbered</font>
FormoreinformationonHTML,gotohttp://www.w3schools.com/html/
Languageencoding
WhenexportingyoursurveyorquestionstoXMLfiles,thesystemneedstoknowwhatencodingissuitableforyour
texts.Otherwise,OpiniowillnotbeabletoreadtheXMLfiles.
SomeXMLencodingreferences:
• Wikipedia[https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references]
• Unicode.org[http://www.unicode.org]
• XMLFAQ[http://www.opentag.com/xfaq_enc.htm]
• W3Schools.com:XMLEncoding[http://www.w3schools.com/xml/xml_encoding.asp]
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Pleasecontactusathttp://www.objectplanet.com/support.htmlifanyoftheselinksbecomeinvalid.
OtherlanguagesinPDFreports
ThespecificcharactersforlanguagesotherthenEnglisharenotdisplayedinthePDFreportsbydefault.Itispossible
toturnthemonbyspecifyingfontthatwillbeusedinthePDFreport.Thefontshouldsupportcharacterstobe
displayandshouldbedefinedintheopinio.propertiesfile,example:Thedefinedfontshouldexistontheserverat
objectplanet.survey.report.pdf.font=c:\\windows\\fonts\\ARIALUNI.TTF
displayandshouldbedefinedintheopinio.propertiesfile,example:Thedefinedfontshouldexistontheserverat
thegivenpath.
TranslateOpinio
Opiniosupportseverallanguagesfortheadministrationscreens.UserscanselectthepreferredlanguageontheMy
Profilescreen.Onlysupportedlanguageswillbeshowninthelist.
Newlanguagescanbeeasilyaddedtothesystem.Toaddanewlanguageyouwillneedtocreatearesourcefileto
holdyourlocalizedtexts.
TheresourcefilesarelocatedintheOPINIO_HOME/WEB-INF/classes/i18nfolder.
1. Copy ApplicationResources.properties to a new resource file. Add your language code to a new file, for
example:
• ApplicationResources_ru.properties-forrussianresourcefile
• ApplicationResources_it.properties-foritalianresourcefile
If your r language uses s other r than latin characters, add '_native' to the e end d of the e file name. . Example:
ApplicationResources_ru.properties_native
2. Translateallmessagesinthefiletoyourlanguage.Theresourcefileisatextfileandcanbeeditedinanyplain-
texteditor. Fornon-Latincharacters theeditormustsupportUTF-8andthefilemustbesavedwithUTF-8
encoding.
Thefilecontainskey-valuepairs.Onlyvaluesmustbetranslated.
Englishversion:
menu.surveys=Surveys
menu.userAdmin=Users
menu.systemInfo=Setup
Norwegianversion:
menu.surveys=Spørrenundersøkelser
menu.userAdmin=Brukere
menu.systemInfo=Konfigurasjon
3. ResultingresourcefilesmustbesavedinASCII.Fornon-Latincharactersyouwillneedtoconvertthefilefrom
nativeencodingtoASCII.Usebuilt-innative2asciiJavatooltodothis(itmustbeinonelineonly,butdueto
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