Gaurav Chikara

Welcome Yakov Fain & Anton Moiseev

I always want o learn new technologies

I just learnt React. Angular is also upcoming language in recent years

Does your book tells why Angular is better than other languages like php,React etc?

Hi Anthony
I have one question on the topic mentioned above
Which Java API shall we know by heart?
There was a case that in interview question interviewers stared grilling me on Thread and java.io API asking what are new things in Java 1.6
I was out of touch of latest in Java API and didn't do good

I am looking for some sample to start with so that I can parse String containing xml using Javax.xml.parsers.SAXParser;
Any inputs are appreciated

Yes, that's true. And if you need your servlet to have access to a UNC path like \\server\etc, here's what you have to do:

Create a user profile which has read/write access to that path (don't use your account, make a new one just for this)

Configure the service where the servlet container runs, and have it log in as that user profile

Thanks a lot for the reply
I am not sure how to achive the point 2 suggested. Is there some help around (which you are available that can help me in knowing its details)

I have mapped my "R" drive to a network shared location (I have read/write access to this shared location)

When I am trying to create file using Servlet Action class I get the following error
R:\SUNONELOCAL.txt (The system cannot find the path specified)

but if I try to do the same through standalone program it works fine

Can anyone please suggest what could be the reason for it

Thanks in advance


From standalone program
try { File file = new File("R:\\gg.txt"); FileOutputStream fo = new FileOutputStream(file); FileWriter fw = new FileWriter(file); System.out.println("created"); } catch(IOException ex) { System.out.println("ex"+ex); } }

From Action class code is

try { File file = new File(fileLocation); FileOutputStream fo = new FileOutputStream(file,true); } catch(FileNotFoundException fe) { addMessage(MessageCodes.INVALID_FILE_PATH,request,true); AELogger.logError(fe.getMessage(),fe); fe.printStackTrace(); return AEConstants.FAILURE_RESULT; }

I have tab characters stored as delemitors in a string like

String str = "\t\t";

When I use Printstream and try to print tab .My intention is to created tab seperations in file but
when i see file comes up like this

M\t\tVIRSA_CC_GENOBJ

But when I use ps.write("\t\t"); (Putting value directly in printstream
My results are correct as expected

M VIRSA_CC_GENOBJ


Is there a way we can get the first case working ?

Thanks in advance

Dear All

I have a requirement to have a backup copy of orginal HashMap so that when some deletion,addition is done on original HashMap I can use a backup Map to track it

My Map structure is like this

Map
|
key-----value (nested Map)
|
key-----value (nested Map)
|
key-----value (List)


I am not able to have a backup copy as whenever something happens to original copy backup copy is also getting affected with same operation

If anyone can please help as I am really stuck

I am using XYChart and its API's
I am facing the following problem

The getHTMLImageMap of this class returns a dymanic tags list something like
<area shape="rect" coords="58,255,77,255" title='BC: 5 ' href="javascript:sbmt(bpid[0],'viewRoleLibDetailsDrillDown.do?recordHistory=true');">
<area shape="rect" coords="95,255,114,255" title='BS: 3 ' href="javascript:sbmt(bpid[1],'viewRoleLibDetailsDrillDown.do?recordHistory=true');">
<area shape="rect" coords="131,255,150,255" title='FB: 1 ' href="javascript:sbmt(bpid[2],'viewRoleLibDetailsDrillDown.do?recordHistory=true');">
<area shape="rect" coords="167,255,186,255" title='FB: 1 ' href="javascript:sbmt(bpid[3],'viewRoleLibDetailsDrillDown.do?recordHistory=true');">
<area shape="rect" coords="204,66,223,255" title='FI: 28121 ' href="javascript:sbmt(bpid[4],'viewRoleLibDetailsDrillDown.do?recordHistory=true');">

problem is that in the last entry I have thousands of records so bar grpah become tallest and we get a clikable area as the wall of this graph

But the remaiining graphs contain only 1 record so I don't get their height and also I cannot even click on their top to call the javascript function
Is there a way to make top of BarGraph as clickable ?

Yeah all set of inserts are with in a same transaction
Therefore ideally shall be there any synchrnonization issues?

Your Logic is quite fuzzy
As said by earlier respondent please move all JDBC related code to some Controller or some Business Layer

Please don't open connections in jsp.

You can't handle exceptions in elegant way here

Besides this,move our actions event oriented Like on clicking of some button pass the values from jsp to some servlet and there insert values appropriately

Dear All
I am facing a strange issue. We have to delete some roles from our application .As per business logic before deletion of roles we store them into ou archive table and once they are stored then we delete them from our main table

This logic works fine with single user environment but whenever testing is performed on multi user we are losing the roleName value of the record and getting exception from table
EXCEPTION: java.lang.Throwable: Cannot assign NULL to host variable 2. setNull&\ 40 ;&\ 41 ; can only be used if the corresponding column is nullable. The statement is " ; INSERT INTO VT_RE_ROLE_ARC &\ 40 ;RLID, RLNAM, RFRMPERD, SYSLSID, RLTYPID, PRJRELID, PROFNAM, DEL_DATE, STATUSID) VALUES ;?, ?, ?, ?, ?, ?, ?, ?, ?&\

In our code we are first selecting the record from our main table VT_RE_ROLE
and putting it into dto.closing prepared ststement,resultset

opening another preparedststement and now using same dto tryin to insert this record

Sample code snippet is as follows
RoleDTO dto = new RoleDTO(); PreparedStatement pstmt1 = null; PreparedStatement pstmt2 = null; ResultSet rs = null; try { pstmt1 = tnx.getConnection().prepareStatement( "SELECT R.RLID, R.RLNAM, R.RFRMPERD, R.SYSLSID, R.PROFNAM, " + " R.RLTYPID, R.PRJRELID, R.STATUSID FROM VT_RE_ROLE R WHERE R.RLID = ?"); pstmt1.setInt(1, roleId); rs = pstmt1.executeQuery(); if (rs.next()) { dto.setId(roleId); [I][B]dto.setName(Util.getString(rs.getString("RLNAM")));[/B][/I]dto.setTypeId(rs.getInt("RLTYPID")); dto.setReleaseId(rs.getInt("PRJRELID")); dto.setReaffirmPeriod(rs.getInt("RFRMPERD")); dto.setSysId(rs.getInt("SYSLSID")); dto.setProfile(Util.getString(rs.getString("PROFNAM"))); dto.setStatusId(rs.getInt("STATUSID")); } closeResultSet( rs, this.getClass().getName(), "archiveRole(int roleId, IVTransaction tnx)"); closeStatement(pstmt1, this.getClass().getName(), "archive"); pstmt2 = tnx.getConnection().prepareStatement( " INSERT INTO VT_RE_ROLE_ARC" + " (RLID, RLNAM, RFRMPERD, SYSLSID, RLTYPID, PRJRELID, PROFNAM, DEL_DATE, STATUSID) " + " VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?) "); pstmt2.setInt(1, dto.getId()); [I][B]pstmt2.setString(2,dto.getName());[/B][/I]//pstmt2.setTimestamp(3, null); //TODO pstmt2.setInt(3, dto.getReaffirmPeriod()); pstmt2.setInt(4, dto.getSysId()); pstmt2.setInt(5, dto.getTypeId()); pstmt2.setInt(6, dto.getReleaseId()); pstmt2.setString(7, Util.emptyToNull(dto.getProfile())); pstmt2.setTimestamp( 8, DateUtils.toSQLTimestamp(new java.util.Date())); pstmt2.setInt(9, dto.getStatusId()); pstmt2.executeUpdate(); closeStatement(pstmt2, this.getClass().getName(), "archive role");

Some how the dto's name property is lost and therefore in subsequent preparedstatement it throws the error mentioned above

If any one can share some inputs that will be of great help

If the URL is from the same web app, the session will be retained.

I am opening a URL to another application but when I am checking the session value for the key I inserted in first application it comes as null.

The session key of this application contains value before window is popped up but after pop up it loses the value.

Dear All
I am not sure as which section my question fits in therefore I am posting it in jsp forum

I am openeing a popup window using window.open and the servlet called using that popup window decides which jsp to render
But when I check session value which I had put before invoking window.open
in the servlet the session value is null

I had heard that session is not retained when we pop up a window but am not 100% sure on it.If any one has any idea that will really be helpful


Thanks in advance
Gaurav

Thanks Jim I am using same mechanism with only diff that I am associating a server node name also with My scheduler
Now my only question is that will it be safe for my scheduler (which extends timer task) to have non-static private variables

I will be initializing scheduler through constructor and this variable will also be initialsed there itself.

We are using Netweaver Application Server