Doubt in using JDBC 2.0

Hi All:
I am trying to program a simple database access using JDBC 2.0 API. Basically my question is, where exactly do we define the JNDI name for accessing the database? I know that it is used in the lookup method of Context object. But where in my local machine should I define the JNDI name that corresponds to my database driver?
Thanks for any help!

Tomcat as well as many other JSP/Servlet containers (WebLogic, JBoss, OAS, SunONE, etc.) has built in directory management system and you can define your resources inside them and access it through JNDI. All these containers can be installed on Windows XP Home! You don't need any other special dir. mgmt. system.
If you need special capabilities, then you can use e.g. ADS but for ADS you have to have Windows Server 200x. Windows 2000 Professional/XP Home are not capable of managing ADS.

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Help: Connecting Tomcat to CA-IDMS Using JDBC Type 4 Drivers (JNDI)

Hi there,
I have a rather interesting / complex problem......creating a connection to CA-IDMS from Tomcat using JDBC type 4 drivers (CA provide the type 4 driver).
We have a zSeries 9 IBM mainframe running CA-IDMS r16.1, and I need to connect to the IDMS from Tomcat (running on Linux) using the JDBC Type 4 drivers provided by CA.
At this stage I am struggling with the actual setup and configuration of Tomcats server.xml and web.xml files. These are the files where the JDBC configuration is set (I think). I have to setup the CA-IDMS part of the configuration, but that is a different problem. Basically there is a TCP/IP listener on the IDMS, waiting for incoming connections from the JDBC type 4 driver.
I set up a Tomcat to MySQL connection using MySQL Connector / J, which is a similar kind of process to what I am trying to achieve with IDMS. MySQL connector / J came with a jar file which is placed in Tomcats lib folder, and then the JDBC setup for the web application is created in Tomcat's server.xml and web.xml files. You can then connect to the MySQL database using JSP and the configured JDBC driver / connection. The CA-IDMS Server comes with an idmsjdbc.jar file, which I think is the JDBC typr 4 driver. I think it needs to be placed in the Tomcat /lib folder, but I dont know how to set up the configuration.
There is a JDBC DriverManager which allows JDBC drivers to connect to CA-IDMS. The DriverManager recognises the following syntax:
jdbc:idms://hostname:port/database
This allows the JDBC driver running within Tomcat to connect to the IDMS which is running on the IDM mainframe. CA IDMS r16 supports direct connections from the Type 4 JDBC driver to the Central Version on IDMS. "hostname" is the DNS name or IP address of the machine where the CV is running, and "port" is the IP port that was specified for the listener PTERM (setup on the IDMS side).
There is a caidms.properties file for the JDBC driver, which is used to specify user ID, password, and optional accounting information. It can also be used to specify physical connection information, allowing an application to connect to a CA-IDMS database without requiring the definition of an ODBC style data source. However, I dont know where to place this file within the Tomcat setup.
There is also an IdmsDataSource class. I dont know where to configure this or how to set it up; the CA-IDMS Server manual states the following:
This class implements the JDBC DataSource interface. It is used with an application server (Tomcat) providing Java Naming and Directory Interface (JNDI) naming service to establish a connection to a CA IDMS database. IdmsDataSource properties conform to the Java Beans naming conventions and are implicitly defined by public setter and getter methods. For example, the description property, which is required for all DataSource implementations, is set using the setDescription(String) method. The application server may use the java.lang.reflection methods to discover DataSource properties and provide an interface to set them, or may simply require that they are defined in some configuration file. IdmsDataSource properties are used to specify the connection parameters. These properties are the equivalent of the DriverPropertyInfo attributes described in the previous section and can be used to completely define the parameters needed to connect to a database. Like a URL, an IdmsDataSource object can also reference an ODBC style data source name, where the connection parameters are defined in the configuration file on Linux.
Is there anyone that can try to point me in the right direction to setting up the JDBC connection? I am totally new to Java and so the instructions are not making much sense at the moment. Any help, hints, tips..anything will be greatly appreciated as I have just hit a brick wall here. I can't find much to do with setting up the CA-IDMS Server JDBC type 4 driver online either....if anyone can point me to some resources that would also be extremely useful.
Kind regards
Jp

You say you've managed to get the JDBC driver working
in an application but not in a JSP. You also say that
the error you get is
"com.microsoft.jdbc.sqlserver.SQLServerDriver".
I'd be willing to bet that the exception that you have
got is a ClassNotFoundException. I.E. your application
server hasn't found the JDBC driver classes. The
application server probably doesn't use your current
CLASSPATH to look for classes. It will be setup within
the application server in some way and you'll need to
check your app server documentation to see how it is
done.
Try replacing
e.printStackTrace();with
e.printStackTrace(out);to get a full stack trace of your error.
ColTried it. Got this error when I tried to run the JSP.
Incompatible type for method. Can't convert javax.servlet.jsp.JspWriter to java.io.PrintWriter.
e.printStackTrace(out);
I'm currently using Apache Tomcat 4.0.3 as my JSP/Servlet Container.
I'm also using Type 4 MS SQL Server 2000 JDBC driver version 2.0 on my NT4.0 Server.
Do I need to set my JDBC driver in my container? if so, how do I do that?

How to use JDBC Connection Pools in a standalone application?

Hi, there,
I have a question about how to use JDBC Connection Pools in an application. I know well about connection pool itself, but I am not quite sure how to keep the pool management object alive all the time to avoid being destroyed by garbage collection.
for example, at the website: http://www.developer.com/java/other/article.php/626291, there is a simple connection pool implementation. there are three classes:JDBCConnection, the application's gateway to the database; JDBCConnectionImpl, the real class/object to provide connection; and JDBCPool, the management class to manage connection pool composed by JDBCConnectionImpl. JDBCPool is designed by Singleton pattern to make sure only one instance. supposing there is only one client to use connection for many times, I guess it's ok because this client first needs instantiate JDBCPool and JDBCConnectionImpl and then will hold the reference to JDBCPool all the time. but how about many clients want to use this JDBCPool? supposing client1 finishes using JDBCPool and quits, then JDBCPool will be destroyed by garbage collection since there is no reference to it, also all the connections of JDBCConnectionImpl in this pool will be destroyed too. that means the next client needs recreate pool and connections! so my question is that if there is a way to keep pool management instance alive all the time to provide connection to any client at any time. I guess maybe I can set the pool management class as daemon thread to solve this problem, but I am not quite sure. besides, there is some other problems about daemon thread, for example, how to make sure there is only one daemon instance? how to quit it gracefully? because once the whole application quits, the daemon thread also quits by force. in that case, all the connections in the pool won't get chance to close.
I know there is another solution by JNDI if we develop servlet application. Tomcat provides an easy way to setup JNDI database pooling source that is available to JSP and Servlet. but how about a standalone application? I mean there is no JNDI service provider. it seems a good solution to combine Commons DBCP with JNID or Apache's Naming (http://jakarta.apache.org/commons/dbcp/index.html). but still, I don't know how to keep pool management instance alive all the time. once we create a JNDI enviroment or naming, if it will save in the memory automatically all the time? or we must implement it as a daemon thread?
any hint will be great apprieciated!
Sam

To my knoledge the pool management instance stays alive as long as the pool is alive. What you have to figure out is how to keep a reference to it if you need to later access it.

How to use JDBC Lookup in PI 7.1 ?

Hi,
Please advise how to use JDBC lookup in message mapping PI 7.1 ? any reference link / document ?
I have followed this step below :
1. Create the external definition for the database table.
2. Use the external definition (table) in message mapping JDBC Lookup.
But the target still "Yellow colour" meanint the mapping hasnot completed yet ? why ? and when i double click the JDBC lookup
there some error message
"No suitable parameter found; define new parameter of type 'Channel' first"
Please advise.
Thank You and Best Regards
Fernand

Hi Fernand,
JDBC Lookup can be done in PI 7.1 using below mentioned steps :
1) Create a communication channel between PI and the database to connect to database.
2) Import the table data as External Definition.
3) In message mapping where this lookup is to be used select JDBC Lookup under Conversions and map
4) Double Click on JDBC Lookup
5) Select parameter and a database table (imported as the external definition). All the elements of the table will appear in the middle column. Select and move the input parameters to the left side column and the output parameters to the right side column. Click OK.
6) Under message mapping go to signature tab and define the parameter as channel and category as JDBC Adapter Type.
7) Under Operation mapping define the parameter & associate it with parameter defined in Message Mapping.
Thanks
Amit

How to update two tables in a single call using JDBC Sender adapter

Hello All,
The scenario is, database entries have to be selected from two tables and at the same time those tables have to be udpated with the flag.
We are using JDBC sender adapter and in Select Query, we are fetching the data by joinin the two tables.
Update Statemtent: We can only update one table using this statement.
Is it possible to update two tables using the Update Statement without using Stored Procedures.
Let me know.
Regards,
Sreenivas.

Hi Sreenivas,
> Is it possible to update two tables using the Update Statement without using Stored Procedures.
Yes its possible through join statement
Check this links
Update in JDBC Sender adapter for more than one table
data from 2 tables for jdbc sender adapter
Regards
Ramesh

To run a report from command line, when using jdbc-odbc bridge

Hi,
How to run a report from command line, when using jdbc-odbc bridge?
Usually with tns, we do by "rwrun module=<> userid=<user>/<passwd>@tns".
with odbc, we do by "rwrun module=<> userid=<user>/<passwd>@odbc:DSN"
Please specify, what is command line arguments for jdbc-odbc bridge driver?
Environment : Oracle 9i Report Builder on WinNT
Database : Sybase
Regards,
Ramanan

Hello Ramanan,
Report Builder : connect JDBC Query in Report Builder is to through Connection Dialog in JDBC Query Editor. User can use a Sign on parameter (can use, default : P_JDBCPDS or can create new) to connect to JDBC Data Source. Connection once made will be mentioned and will be reused through out Reports Builder.
JDBC PDS allows user to connect one or more same or different kind of databases.
While running report through runtime or Server, user can pass the sign on parameter(connection string) value, like any other user parameter.
Syntax for connection string : <username>/<password>@databaseURL . The syntax of database part of connection string depend on the type of JDBC Driver used to connect to Data Source while designing the JDBC Query. databaseURL refer to the location of the database and its format depend on the JDBCPDS river selected in design time while creating the JDBC Query.
rwrun eg :
rwrun report=jdbc_odbc.rdf destype=file desname=output.html desformat=html P_JDBCPDS=scott/tiger@database
Server eg :
http://server.com:8888/servlet/RWServlet?server=MyReportServer+report=jdbc_odbc.rdf+destype=cache+desformat=html+P_JDBCPDS=scott/tiger@database
http :
Please see ORACLE_HOME/reports/conf/jdbcpds.conf for more information.
With Regards
Reports Team

Loading big XML files using JDBC gives errors

Hi,
I've created a XMLType table using binary storage, with the restriction that any document stored has a (any) schema:
CREATE TABLE XMLBIN OF XMLTYPE
XMLTYPE STORE AS BINARY XML
ALLOW ANYSCHEMA;Then I use JDBC to store a relatively large document using the following code:
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
String connectionString = "jdbc:oracle:thin:@host:1521:sid";
File f = new File("c:\\temp\\big.xml");
Connection conn = DriverManager.getConnection(connectionString, "username", "password");
XMLType xml = XMLType.createXML(conn,new FileInputStream(f));
String statementText = "INSERT INTO xmlbin VALUES (?)";
OracleResultSet resultSet = null;
OracleCallableStatement statement = (OracleCallableStatement)conn.prepareCall(statementText);
statement.setObject(1,xml);
statement.execute();
statement.close();
conn.commit();
conn.close();Loading a file of 61Mb (real Mb, in non-IT Mb (where 1Mb seems to be 10^6) it is 63.9Mb) or less doesn't give any errors, loading a file bigger then that gives the following error:
java.sql.SQLRecoverableException: Io exception: Software caused connection abort: socket write error
        at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:101)
        at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:229)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:458)
        at oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:960)
        at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1222)
        at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3381)
        at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3482)
        at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:3856)
        at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1373)
        at jdbctest.Tester.main(Tester.java:60)A succesful insert of a 63Mb file takes about 23 seconds to execute. The 70Mb file fails already after a few seconds, so I'm ruling out any time outs.
I'm guessing there are some buffers that need to be enlarged, but don't have a clue which ones.
Anyone any idea what might cause the problem and how to resolve?
My server runs Oracle 11g Win32. The client is Windows running Sun Java 1.6, using ojdbc6.jar and Oracle 11g Client installed.
Cheers,
Harald

Hi Mark,
The trace log in the OEM shows me:
Errors in file d:\oracle11g\app\helium\diag\rdbms\helium\helium\trace\helium_ora_6948.trc (incident=7510): ORA-07445: exception encountered: core dump [__intel_new_memcpy()+613] [ACCESS_VIOLATION] [ADDR:0x0] [PC:0x6104B045] [UNABLE_TO_WRITE] [] If needed I can post the full contents (if I find out how, am still a novice :-))
Cheers,
Harald

Use JDBC to query data for JSP Report

Hi all,
I met a trouble when use JDBC to query data,
it can show data in report builder, but get error when call from url for exxample: http://localhost:8889/reports/TestJDBCReport.jsp
found error message:
javax.servlet.jsp.JspException: rwlib-1: REP-4100: Failed to execute data source. REP-0069: Internal error JDBCPDS-62000:Invalid sign-on parameter P_JDBCPDS
javax.servlet.jsp.JspException: rwlib-1: REP-4100: Failed to execute data source.
REP-0069: Internal error
JDBCPDS-62000:Invalid sign-on parameter P_JDBCPDS
anyone know pls help me
Many thanks

As a general rule, it's a good idea to separate the
presentation (JSP and HTML) from the business rules
(database access). I know you didn't do that on the
AS/400, you had display files and business logic in
the same program (at least, we certainly do in ours),
but it's a good policy to follow in the web world.
That means, don't put your database access code in
the JSP. Other than that, it depends on the data.
If you have simple data (e.g. customer's name and
d address) then a Java bean would suffice. If you
have complex data (e.g. customer's payment history)
then a bean still might suffice. You would use an
"include" if you had some data (static or dynamic)
that you wanted to appear in several different pages
in the same form.Thanks, I figured putting the code in the JSP was not the best way, but I wasn't sure about the other options.

How can i put a file into blob using jdbc !?

Hi
i tried to put a file into blob , but got a problem.....
My environment:windows 2000pro,JBuilder 5.0 enterprise,oracle 8.1.6,(not install oracle jdbc driver )
a part of program(my program is very uglily,if anyone want,later i paste it ba....~_~)
//Statement stmt2=null;
//Resultset rs2;
//opa1 is the blob data
void saveBlobTableToDisk(Connection con) {
try {
stmt2=con.createStatement();
sqlStr2="SELECT * FROM emp3 where id=1004";
rs2=stmt2.executeQuery(sqlStr2);
while (rs2.next()) {
Blob aBlob=rs2.getBlob("opa1");
i got the exception :
" null
java.lang.UnsupportedOperationException
     at sun.jdbc.odbc.JdbcOdbcResultSet.getBlob(JdbcOdbcResultSet.java:4174)
     at test3.Frame1.saveBlobTableToDisk(Frame1.java:48)
     at test3.Frame1.<init>(Frame1.java:26)
     at test3.Application1.<init>(Application1.java:5)
     at test3.Application1.main(Application1.java:8) "
and the windows pop up a messagebox said that(about) my memory "0x09af007f" could not read, error in javaw.exe .
Later i used (ResultSet)getBinaryStream() to solve it. but getBinaryStream() only return a InputStream,so that i can make blob to a file,but i can't make a file to blob using jdbc.....
I am very stupid that installing sun java, oracle jdbc driver etc....(because i must set a lot of thing such as classpath,java_home etc), Can i only use JBuilder to do that ?
Or i must install oracle jdbc driver ?
Thanks.
D.T.

My guess here is that Sun's JDBC-ODBC bridge doesn't handle the BLOB datatype. Most ODBC drivers don't support that datatype, so I wouldn't expect the bridge to.
Is there a reason that you can't use the Oracle driver?
Justin

Error while loading xml files using JDBC

Hi,
I am trying to load xml files into an xmltype table using JDBC calls and am getting this error for some files
LPX-00200: could not convert from encoding UTF-8 to UCS2
The xml files and our database are both UTF-8 encoded. The version of oracle that we have here is 9.2.0.6
Any suggestions in this matter will be greatly appreciated.
Thanks,
Uma

I also experienced this problem and unfortunately this solution didn't work for me given that the tag you suggested was already on the XML file.

Error while updating database using jdbc receiver adapter

Hi All,
I am trying to update a single record using jdbc receiver adapter.
This is my the message that is getting created..
<?xml version="1.0" encoding="UTF-8" ?>
- <ns0:Data xmlns:ns0="urn:Test">
- <STATEMENT>
- <TABLENAME ACTION="UPDATE_INSERT">
<TABLE>ORDERS</TABLE>
- <ACCESS>
<OrderID>99999</OrderID>
<CustomerID>VICTE</CustomerID>
<EmployeeID>3</EmployeeID>
<ShipAddress>VICTE</ShipAddress>
</ACCESS>
- <KEY>
<OrderID compareOperation="EQ">99999</OrderID>
<ShipAddress compareOperation="EQ">VICTE</ShipAddress>
</KEY>
</TABLENAME>
</STATEMENT>
</ns0:Data>
But in Adapter Monitoring i am getting the following error..
<i>Error while parsing or executing XML-SQL document: Error processing request in sax parser: Error when executing statement for table/stored proc. 'ORDERS' (structure 'STATEMENT'): java.sql.SQLException: [Microsoft][ODBC SQL Server Driver][SQL Server]Line 1: Incorrect syntax near 'VICTE'.</i>
Regards,
Rahul

Rahul,
> In this case i believe the interface has to be synch.
> So what will the response message type be like..
Not necessary. UPDATE can be asynch as well.
Can you turn the trace on like pointed by Michal and then you can see the Query in the Audit Log of the adapter montioring. Try to execute the same query from your DB Client like TOAD and see what is the Syntax error you are getiing.!
The problem looks like some field has some dataype / column name mismatch.
Regards
Bhavesh

Calling a stored procedure with VARRAY as out parameter using JDBC

Hi,
I want to use the data type VARRAY as an out parameter in an Oracle stored procedure. I want to call the stored procedure from
my java program using JDBC.
I'm using Oracle 8.1.5 for Windows NT.
Please help me.
Thanks
Sumanta
null

Originally posted by JDBC Development Team:
It's very similar to other datatype except that it uses OracleTypes.ARRAY typecode and the value is mapped to a oracle.sql.ARRAY instance. The code looks as follows --
cstmt.registerOutParameter (idx, OracleTypes.ARRAY, "VARRAY_TYPE_NAME_HERE");
cstmt.execute ();
ARRAY array = (ARRAY) cstmt.getObject (idx);
Thanks for your reply.
I have to use:-
OracleCallableStatement cs1 = (OracleCallableStatement )conn.prepareCall
( "{call proj_array(?)}" ) ;
for retrieving a collection as an OUT parameter.
This gives me the errors:-
C:\jdbc\VarraySQL.java:0: The method oracle.jdbc2.Blob getBlob(int) declared in class oracle.jdbc.driver.OracleCallableStatement cannot override the method of the same signature declared in interface java.sql.CallableStatement. They must have the same return type.
import java.sql.*;
^
C:\jdbc\VarraySQL.java:0: The method oracle.jdbc2.Array getArray(int) declared in class oracle.jdbc.driver.OracleCallableStatement cannot override the method of the same signature declared in interface java.sql.CallableStatement. They must have the same return type.
import java.sql.*;
^
C:\jdbc\VarraySQL.java:0: The method oracle.jdbc2.Clob getClob(int) declared in class oracle.jdbc.driver.OracleCallableStatement cannot override the method of the same signature declared in interface java.sql.CallableStatement. They must have the same return type.
import java.sql.*;
^
C:\jdbc\VarraySQL.java:0: The method oracle.jdbc2.Ref getRef(int) declared in class oracle.jdbc.driver.OracleCallableStatement cannot override the method of the same signature declared in interface java.sql.CallableStatement. They must have the same return type.
import java.sql.*;
^
How do I get rid of these errors?
null

Creation of tables using JDBC or SQLJ in webdynpro application

Hi,
I am trying to create tables in javadictionary(MaxDB)using my WebDynpro application.I tried creating tables using SQLJ and JDBC.But I was not able to do it.I can select and insert data into already created tables.
Whwn I tried creating a table using JDBC I encountered the following exception.
com.sap.sql.log.OpenSQLException: The SQL statement "CREATE TABLE TMP_DEPID (DEPID varchar(10) NOT NULL,DEPNAME VARCHAR(25))" contains the syntax error[s]: Open SQL syntax error: CREATE ... TABLE is not supported
SQL syntax error: "VARCHAR" is a reserved keyword and cannot be used as an unquoted identifier
Does this mean that creating tables is not supported?
Can anyone help me in this matter?
Thanks in advance,
regards
~Pradeep Shetty

Hi Pradeep,
Yes, OpenSQL does not support creation of tables. But why would you need to create tables at runtime?! The natural way is to create the model at design time of your application, i.e. with the Java DataDictionary.
However, if for any reason you really need to create database tables at runtime, you can achieve this by using a non-OpenSQL datasource, e.g. you could create a VendorSQL one and use it to obtain JDBC connections in your app. See also http://help.sap.com/saphelp_nw04/helpdata/en/c0/3ad4d5cdc66447a188b582aad537d3/frameset.htm.
Hope that helps!
Vladimir

How to get columns comments metadata using JDBC

I want to get the columns comments metadata using JDBC, I tried using the OracleMetaDataObject but failed. Looks like the OracleMetaDataObject API does not support it using the latest ojdbc6.jar driver as well. Please help. I need to display the column comments to the users in a J2ee application.

Duplicate, locking.

Problem using Jdbc-Odbc Bridge

Hi,
I am using Java 2 SDK and I am trying to access MS Access database on my machine using Jdbc-Odbc bridge. I have set up the DSN in ODBC. But I get the following error when I run my program -
'No Suitable Driver'
Here's my code snippet-
Class.forName ("sun.jdbc.odbc.JdbcOdbcDriver");
String dsn = "jdbc:odbc:DriverInfoDB";
Connection con = DriverManager.getConnection(dsn,"","");
con.setAutoCommit(false);
Statement stmt;
String query = null; // SQL select string
ResultSet rs; // SQL query results
stmt = con.createStatement();
.....etc etc...
Where is the error in this code??
Help Needed!!
Thanks
Vivek.

try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection(dsn,"guest","guest");
OR DriverManager.getConnection(dsn);
System.out.println("Conection's opened");
catch(ClassNotFoundException cnfe)
System.err.println(cnfe);
catch(SQLException sqle)
System.err.println(sqle);
try that code and double check you DSN Name . it's a good practice to greate a system DSN.
i hope that helps.
FEEL FREE TO ASK. WON'T BITE U
ABDUL

Doubt in using JDBC 2.0

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