CachedRowSet

I am new to java but I am trying to use a CachedRowSet. I have downloaded the jdbc2_0-stdext-src.zip file and extracted the files and have installed JavaTM 2 SDK, Enterprise Edition 1.3.1 but my IDE (NetBeans IDE 3.4.1) is complaining that the "import sun.jdbc.rowset.*;" package does not exist and it appears that that is what is missing, (It doesn't appear in the java hiearchy either), and that it cannot resolve symbol CachedRowSet. Can you give me any hints as to why it may be doing this
import java.sql.*;
import java.io.*;
import javax.sql.RowSet.*;
import sun.jdbc.rowset.*;
class DBConnect
Connection con;
Statement statement;
private static String dbName = null;
private static String dbPass = null;
int nCtry = 0;
int sites[];
String sPages[];
boolean DBConnect()
String sURL;
// This is a test comment.
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
sURL = "jdbc:odbc:TestDB";
con = DriverManager.getConnection(sURL, dbName, dbPass);
statement = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
return true;
catch (ClassNotFoundException e)
System.err.println(e);
return false;
catch (SQLException sqle)
System.err.println(sqle);
return false;
void getCountries(int dbCtryID[])
int nCtry = 0;
String ssql = "SELECT country_id, active FROM sites WHERE active = True;";
try
CachedRowSet cacheRS = new CachedRowSet();
Thanks in advance
Lyell

Hi,
The jdbc2_0-stdext-src.zip fileyou are using does contain the classes that implement cachedrowset features.
you need to download jar from http://developer.java.sun.com/developer/earlyAccess/crs/
Its a zip file rowset-1_0-ea4.zip .Extract rowset.jar file from that zip file.
Mount rowset.jar in your netbeans IDE.(To mount right click the filesystem node,select archive files,select the rowset.jar file)
Hope this helps.

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CachedRowSet displaying 5 records at a time

hi all,
Iam working on CachedRowSet is it possible to records in groups of 5 from a whole lot of 100 records?? pls let me know...
thanks in advance
Karthik

<Statement>.setMaxRows(5);

Error while running CachedRowSet Example

I am getting the following error when I try to the CachedRowSet example. Any help would would be greatly appreciated.
ERROR:
Request URI:/test548_html/untitled2.jsp
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CODE EXAMPLE AS IN JSP DEVELOPERS GUIDE:
<%@ page import="java.sql.*, javax.sql.*, oracle.jdbc.pool.*" %>
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Query for the available responsibility for the given user. Say for example: "Order Management Super User"
Application: Order Management
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Maximum Open Cursors with the CachedRowSet

Hi all,
I have a simple task that is cause significant headaches. I'm using the CachedRowSet to process records from an Oracle 8.1.6 database. The code simply populates the row set with records, makes changes to 2 or 3 fields in each record, then calls the acceptChanges().
When I process about 200 records, everything works fine. If I try to process 300 records, I get the error
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we've had similar problems with Oracle creating and not destroying its own cursors("under the covers"). There is relevant info at the following link:
http://forums.java.sun.com/thread.jsp?forum=48&thread=135291
quick checklist:
1. close all statements/preparedstatements/resultsets explicitly and immediately after you are finished with them
2. increase your number of open_cursors in init.ora file
-->we had to increase ours to over 700 at one point.
3. commit/rollback explicitly when finished transactions.
hope this helps
Jamie

Invalid Cursor Position Error on Windows XP using CachedRowSet

Hello, I don't know if this question lies here, but I thought it would be the well suited place so please pardon me if it isn't. I am trying to access multiple pages from my database on my XP machine but I am getting an "invalid cursor position" error when trying to access the next page. I don't know how this error is coming about because it works well on a Vista machine with no errors. I don't know if it is my drivers or something that brings about the problem. I am using mysql connecter 5.1.10, JRE 1.6.0_02 and windows XP SP2
Below is a simple code that brings the error.
package Admin; import javax.sql.rowset.CachedRowSet; import com.sun.rowset.CachedRowSetImpl; public class test { public void table() { try { CachedRowSet crs=new CachedRowSetImpl(); crs.setUrl("jdbc:mysql://host:3306/database"); crs.setUsername("User"); crs.setPassword("password"); crs.setCommand("select * from myTable"); int[] keys = {1}; crs.setKeyColumns(keys); crs.execute(); crs.last(); if(crs.getRow()>500){ //new overLimit(); } crs.setPageSize(3); crs.execute(); while (crs.next()) { System.out.print("page one----"); System.out.println(crs.getString(1)); } while(crs.nextPage()){ System.out.println("page two---"); while (crs.next()) { System.out.println("in page two"); System.out.println(crs.getString(1)); } } } catch (Exception e) { e.printStackTrace(); } } public static void main(String []args){ new test().table(); } }

Yes I am running the same code on both machines. The output I get on the XP machine is shown below. I modified the code I posted earlier and replaced the "page two" text with "page (then page number)" and also omitted the "in page two" text for better readability---------PAGE 0---------
DB09140110
DU35463010
EX29201810
---------PAGE 1---------
EX38341510
EX40471810
KZ280299
----------PAGE 2---------
LA130299
LC130299
MC081009
----------PAGE 3---------
RZ300502
VA130299
VI020209
----------PAGE 4---------
YX101008
ZE220299
ZF231105and vista....
----------PAGE 0---------
EX38341510
EX40471810
KZ280299
----------PAGE 1---------
LA130299
LC130299
MC081009
----------PAGE 2---------
RZ300502
VA130299
VI020209
----------PAGE 3---------
YX101008
ZE220299
ZF231105

Problem when perform acceptChanges method on CachedRowset twice

Hi,
i'm using a CachedRowSet in my application.
All goes fine, when i retrieve data from database. But when i'm trying to update my data more than once, a SyncProviderException occur.
This is my code:
crset.updateRow();
crset.acceptChanges(DBProperties.getInstance().getConn());
crset.updateString("first_name", "new val");
crset.updateRow();
crset.acceptChanges(DBProperties.getInstance().getConn());
The first call of acceptChanges work fine, but the second call to the same method throw a SyncProviderException.
What's wrong with this code?
Message was edited by:
zorgz

>
How Can I loop through a piece of code, as if I am running that code for the first time. (i.e. How can I clear all the variables and data and start a new clean instance).
>
Simple - the scope of variables is limited to the block that the variable is in
1. define a new block for that piece of code using { and }.
2. inside the block reinitialize the variables that the code in the block uses
3. don't use any variables that are NOT initialized at the start of the block
This sample code should show you the concept. It has a variable 'j' that is used outside the block to contain the loop iteration number and is used inside the block to contain the value 47.
Note that setting the variable to 47 inside the block has no effect on the value that was set outside the block.
public class Test3 {
    public static void main(String[] args) {
        for (int i = 0; i < 5; i++)
            int j;
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            System.err.println("Outside j = " + j);
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                System.err.println("Inside j = " + j);
            }   // this ends the new block - the 'inside' value of 'j' no longer exists
Outside j = 0
Inside j = 47
Outside j = 1
Inside j = 47
Outside j = 2
Inside j = 47
Outside j = 3
Inside j = 47
Outside j = 4
Inside j = 47

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Hello,
I wanted to transfer some database tables to another machine, thus I used RMI. I found there was a class called CachedRowset which could be serialized. So, I decided to use this.
However, when I wrote the following code in an rmi method and ran, problem occurred.
CachedRowSet crs= new CachedRowSetImpl();
A NullPointerException was thrown:
java.lang.NullPointerException
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     at java.util.Properties.load0(Unknown Source)
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I could not figure out the reason. Who can help me?
Thanks.

Hi @hamidjoon , and welcome to the HP Forums!
I see you are having copy issues. I'd like to help!
Before we get started, I need a little info:
I am linking a few HP Support documents below that will show you how to find which operating system you are using. Also, if you're using Windows, please include whether your operating system is 32-bit or 64-bit.
Mac OS X: How Do I Find Which Mac OS X Version Is on My Computer?
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Jamieson
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Cachedrowset acceptchanges() NOT updating to database

i wrote this code so that "cachedrowset -- crs" (i got from the "resultset -- rs") can be changed according to the condn specified and the modified cachedrowset will be updated in the oracle database.
condn. is when " name=sanjiv" it will change it to "rajiv" both in cachedrowset and database , it is changed in the cachedrowset (according to output below) but NOT changed in the database.
the output is
//start
tushar--100000
sanjiv--890000
rajesh--790000
tushar--100000
rajiv--7900
rajesh--790000
//end
// code start
import java.sql.*;
import javax.sql.RowSetMetaData;
import javax.sql.rowset.RowSetMetaDataImpl;
import com.sun.rowset.CachedRowSetImpl;
public class rowsetter {
public static void main(String[] args) throws Exception {
Connection conn=null;
Statement stmt=null;
ResultSet rs=null;
CachedRowSetImpl crs = new CachedRowSetImpl();
try{
conn = DriverManager.getConnection("jdbc:odbc:mydatasource","scott","tiger");
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
rs=stmt.executeQuery("select * from salary");
ResultSetMetaData rsmd = rs.getMetaData();
int rsmdcolcount = rsmd.getColumnCount();
crs.populate(rs);
RowSetMetaData rsmd1 = (RowSetMetaData)crs.getMetaData();
int rsmd1colcount = rsmd1.getColumnCount();
crs.setMetaData(rsmd1);
rsmd1.setColumnName(1,"name"); rsmd1.setColumnType(1,Types.VARCHAR);
rsmd1.setColumnName(2,"salary"); rsmd1.setColumnType(2,Types.VARCHAR);
crs.setTableName("salary");
while(crs.next()){
System.out.println(crs.getString(1)+"--"+crs.getInt(2));
if(crs.getString(1).trim().equals("sanjiv")){
crs.moveToCurrentRow(); crs.updateString(1,"rajiv"); crs.updateInt(2,7900);
crs.acceptChanges(conn);
crs.beforeFirst();
while(crs.next()){
System.out.println(crs.getString(1)+"--"+crs.getInt(2));
conn.close();
catch(SQLException sqle){
System.out.println("Exception Occured SQLE"+sqle);
catch(Exception ex){
System.out.println("Exception Occured "+ex);
//code end

Hi Marc,
In EXIT_SAPMM06E_018 do as follows:
e_ci_ekpo = ekpo_ci.
The append structure CI_EKPODB is included in ekpo_ci. Moreover the screen fields should be created with reference to ekpo_ci.
This will update the database table with values for the custom field.
Hope this helps.
Regards,
Abhisek.

CachedRowSet problem in Weblogic 6.1 and Oracle thin driver 9.0.1

Has anyone used the CachedRowSet class successfully? (this classes are
new and from the JDBC extension pack)
I am experiencing "Not in a transaction" errors when executing
cachedrowset.populate(resultset), even though I'm inside a correct
ut.begin and ut.commit transaction.
Note I don't have these problems when I don't use the CachedRowSet
classes.
If I remove the setFetchSize(50) line, then I receive the ORA-01002:
fetch out of sequence error, which is discussed in another post on
this newsgroup.
I don't have any of these problems at all, if I use the Oracle Thin
Driver directly (i.e. not using Weblogic 6.1).
-H
Example of code:
stmt = getConnection().createStatement();
stmt.setFetchSize(50);
stmt.executeQuery("SELECT * FROM ASSET");
rs = stmt.getResultSet();
crs = new CachedRowSet();
crs.populate(rs);

Hi Arturo,
What kind of a problem do you have? Any stacktraces?
Regards,
Slava Imeshev
"Arturo Fernandez" <[email protected]> wrote in message
news:[email protected]..
Hi! I have a problem with CLOB column in Oracle 8.1.7. My enviroment
is:
Windows 2000, BEA WLS 6.1 and Oracle 8.1.7. I'm trying to use
'classes12.zip' provided by Oracle. I added 'classes12.zip' to
CLASSPATH after than 'weblogic.jar' in my startup server script, but
it fails when trying to retrieve a CLOB data from database. Script
includes:
setCLASSPATH=.\classes12_01.zip;.;.\lib\weblogic_sp.jar;.\lib\weblogic.jar;
>
But this driver and the code runs sucessfully with the same database
and weblogic 5.1. I'm interesting in use this driver and this code
because i'm trying to migrate two applications from WLS 5.1 to WLS 6.1
I cannot find a solution.
Can everybody help me, please? It's urgent for me...

CachedRowSet Pagination

Section 10.0 of the javadoc for CachedRowSet has this example.
CachedRowSet crs = new CachedRowSetImpl();
crs.setPageSize(5);
crs.execute(conHandle);
Did they forget to set the command? I assume that is the case. What is not clear is how the connection handle is managed. I think it's safe to assume we close the connection handle. The bigger question is pagination. This makes no sense to me:
To access the next page (chunk of data), an application calls the method nextPage. This method creates a new CachedRowSet object and fills it with the next page of data.I have the saame CachedRowSet object. I assume they mean it repopulates itself?
The data from the first CachedRowSet object will no longer be in memory because it is replaced with the data from the second CachedRowSet object.The data is replaced, NOT the CachedRowSet object, right? Nothing in the example shows the object reference being replaced.
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Writing raw Java code with the JDBC API in a JSP file instead of a Java class and having problems with the JDBC API doesn't make it a JSP problem. Get rid of that scriptlet clutter and just put it all nicely in a Java class and test it independently as a Java application using main().
There's a JDBC forum around for problems with the JDBC API.

How can I instantiate and load a new CachedRowSet object from a non-JDBC so

How can I instantiate and load a new CachedRowSet object from a non-JDBC source?
cheers

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Hi....
I have some trouble using cachedRowSet and cachedDataProvider combination. The problem was occured when I refreshed chachedDataProvider, my table component in pages show "No items found.", whereas... i'm sure there is nothing wrong with my query.
here the detail
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cachedRowSetDataProvider1.setCachedRowSet((javax.sql.rowset.CachedRowSet) getValue("#{SessionBean1.globalRowSet}"));Note that in globalRowSet SQL command, there is a parameter (marked by '?'), so i put this code in init() method.
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try {
getSessionBean1().getGlobalRowSet().setObject(1, this.textField1.getText().toString());
this.cachedRowSetDataProvider1.refresh();
} catch (SQLException ex) {
Logger.getLogger(TestPage.class.getName()).log(Level.SEVERE, null, ex);
return null;
}I ran my webpages, i hit the button, and i saw anomalies.
before i hit the button, my table shows a lot of records. but after i hit, my table shows nothing but "No items found." displayed in table body.
I debugged my code, and found nothing wrong with my query. I executed my query in separated sql editor and it works flawlessly,
I truncated my code line by line for debugging, and found this line of code was the main reason for that problem
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can anyone help give me a solution for this issue? ...
please help..
i have no progression for last 2 weeks because of this issue.......

Hi Tushar,
In your SELECT you select only record for record and you put the result into the header line of the table.
Try:
SELECT posnr
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      INTO TABLE IRESB
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Regards,
John.

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Hi grzegorz,
1. If your sap application server is unix/aix
(and not a microsoft OS),
2. then this kind of secondary databse connection,
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Help on CachedRowSet with setDataSourceName for Oracle needed

Hello users,
I am using WL6.1. and SUN's CachedRowSet. It works fine with setURL and it is very
fast with Oracle's oci thin driver. One more time for BEA people: oracle.jdbc.driver.OracleDriver
is more than 3 times faster than weblogic.jdbc.oci.Driver. Of course when I do setURL,
it bypasses WL and go directly to the database. And it is not using any connection
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with proper JNDI name, Sun's CachedRowset could not figure out what WLInitialContextFactory
is (it must have its own hard-coded context factory which I don't know what it is
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Unable to connect".
Can anyone tell me how to make it work? (How to use setDataSourceName for CachedRowSet
for WL). The key is what ContextFactory to use.
Thanks in advance.
L.W.X.

I am assuming there is some reverse proxy web server with OAM WebGate which is fronting the tomcat and JBoss servers. Also, assuming you are using FQDNs throughout.
Is the ObSSOCookie sent when you access the external applications after logging into portal? It should help to look through the HTTP headers. Also, it could be an issue with authentication levels/IP validation failure - these should show up in the WebGate logs.
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Want know about CachedRowSet ?

hi everybody,
I wnat to know about CachedRowSet and exaple related to it.
and also want to know why do we use the DTO,DAO and VO in project.
Can anyone tell me about it, where i could get the details about these.

I wnat to know about CachedRowSet and exaple related to it.Simply read it's API documentation ... http://java.sun.com/j2se/1.5.0/docs/api/javax/sql/rowset/CachedRowSet.html
and also want to know why do we use the DTO,DAO and VO in project.Separation of the Data, Business and Presentation tiers.

Updating a JTable using CachedRowSet data

Hello, I would like to know how I can update my already created JTable receiving data from a CachedRowSet without creating a new table model (this is the method I have been using). I have read about using the fireTableDataChanged() method but I cant figure out how to use this works. Maybe an explanation on how the information in the CachedRowSet is updated in the JTable when notifiers are used will help.
Any help will be appreciated

camickr wrote:
table.setAutoCreateColumnsFromModel( false );
Perfect. This works well for my issue. I can now use the setModel() method without having the columns reordered.Damn camickr, that is a bloody good thing to know (it's often so much easier to recreate the table model, here's a very neat solution to one of the pitfalls)! Thanks :)
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I have two classes, one for the CachedRowSet and the other with the table implementationsAs you describe it, I don't think that's a good approach: what I meant wad an implementation of TableModel , not a subclass of JTable : the stock JTable already knows how to work with any model implementation, as long as it implements TableModel .
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My suggestion was that you define a custom class that extends AbstractTableModel , and uses its fireXxx judiciously.
here is an example:
public class RowSetAwareTableModel extends AbstractTableModel {
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        this rowSet = newdata;
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    public int getRowCount() {
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}

CachedRowSet

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