Java Stored Procedure / Server Side / Client Side / connection

Hi,
I would like to know if we can know at the runtime with a JDBC api if the stored procedure is running in client side or in server side ?
THANKS

You wrote
"Java stored procedures -- by definition - are stored in the 8i rdbms. !!"
From the Oracle8i Java Stored Procedures Developer's Guide
Release 8.1.5
A64686-01
"If you create Java class files on the client side, you can use loadjava to upload them into the RDBMS. Alternatively, you can upload Java source files and let the Aurora JVM compile them. In most cases, it is best to compile and debug programs on the client side, then upload the class files for final testing within the RDBMS"
This means that you can create shared classes that are used on both the client and server side. The source does not need to reside within the server (according to their documentation). Please also note the following from the Oracle8i JDBC Developer's Guide and Reference Release 8.1.5 A64685-01 for using the getConnection() method on the server:
"If you connect to the database with the DriverManager.getConnection() method, then use the connect string jdbc:oracle:kprb:. For example:
DriverManager.getConnection("jdbc:oracle:kprb:");
Note that you could include a user name and password in the string, but because you are connecting from the server, they would be ignored."
So if you're coding a shared class that is to run on both the client and server side, you might do something like this:
Connection conn =
DriverManager.getConnection(
System.getProperty("oracle.server.version") == null
? "jdbc:oracle:thin:@hostname:1521:ORCL"
: "jdbc:oracle:kprb:"),
"youruserid","yourpassword");
As stated earlier, the userid and password are supposedly ignored for server connections retrieved in this manner. I haven't tried this yet, but it is documented by Oracle.
Regards,
Steve
null

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APEX fails with Java stored procedure that creates a JDBC connection

Hello!
We are facing a strange problem since we have upgraded from Oracle 10g and Apache to Oracle 11g with Embedded Gateway.
Here is what we do:
** APEXX calls a PL/SQL package function "OPEN_CONNECTION" that wraps a Java stored procedure called "openConnection".*
FILE_READER_REMOTE_API.openConnection(user, password, host, port, service);
** The Java stored procedures "openConnection" opens a JDBC connection to an other database:*
public class FileReaderRemote {
private static Connection conn = null;
private static DefaultContext remoteContext = null;
public static void openConnection(String user, String password, String host, String port, String service) throws SQLException {
// Load the Oracle JDBC driver
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
java.util.Properties props = new java.util.Properties();
props.put ("user", user);
props.put ("password", password);
//props.put ("database", "//" + host + ":" + port + "/" + service);
props.put ("database", host + ":" + port + ":" + service);
props.put("v$session.program", "FileReaderRemote2");
// Connect to the database
remoteContext = Oracle.getConnection("jdbc:oracle:thin:", props);
This procedure used to work fine before the upgrade, but now we see the following:
* It still works when called directly from TOAD or SQL*Plus, even under the user ANONYMOUS.
* When called from APEX and the target database is Oracle 11g, it still works.
* When called from APEX and the target database is Oracle 10g, it takes several minutes and we receive this error:
*"Socket read timed out"*
We have tested the following workaround:
We have created a database link to our own database and called the stored procedure through that database link.
FILE_READER_REMOTE_API.openConnection*@loopback*(user, password, host, port, service);
This works, but is not really an option.
I hope some one of you can explain this strange behaviour to me.
Best regards,
Matthias

You wrote
"Java stored procedures -- by definition - are stored in the 8i rdbms. !!"
From the Oracle8i Java Stored Procedures Developer's Guide
Release 8.1.5
A64686-01
"If you create Java class files on the client side, you can use loadjava to upload them into the RDBMS. Alternatively, you can upload Java source files and let the Aurora JVM compile them. In most cases, it is best to compile and debug programs on the client side, then upload the class files for final testing within the RDBMS"
This means that you can create shared classes that are used on both the client and server side. The source does not need to reside within the server (according to their documentation). Please also note the following from the Oracle8i JDBC Developer's Guide and Reference Release 8.1.5 A64685-01 for using the getConnection() method on the server:
"If you connect to the database with the DriverManager.getConnection() method, then use the connect string jdbc:oracle:kprb:. For example:
DriverManager.getConnection("jdbc:oracle:kprb:");
Note that you could include a user name and password in the string, but because you are connecting from the server, they would be ignored."
So if you're coding a shared class that is to run on both the client and server side, you might do something like this:
Connection conn =
DriverManager.getConnection(
System.getProperty("oracle.server.version") == null
? "jdbc:oracle:thin:@hostname:1521:ORCL"
: "jdbc:oracle:kprb:"),
"youruserid","yourpassword");
As stated earlier, the userid and password are supposedly ignored for server connections retrieved in this manner. I haven't tried this yet, but it is documented by Oracle.
Regards,
Steve
null

Return national language strings from java stored procedures

Hi, all.
How does i can return String which contains national characters from java stored procedure? I.e. convert UTF java string to national language of database. It's does not processing automatically (why?).
declaration of procedure:
CREATE OR REPLACE FUNCTION TestNLSString RETURN VARCHAR2
AS
LANGUAGE JAVA
NAME 'test.SomeClass.getNLSString() return java.lang.String';
SELECT TestNLSString AS X FROM DUAL;
X
iiiii
OS: Windows 2000 Server
Oracle Server version: Oracle 8.1.7.1.4

Ok. I had a specific problem.
I want to use java stored procedure (function) to make a connection to remote db using supplied connection parameters make some quieries there end return results in a form of structured data - object.
I have defined an object type in a database where the function will reside. I granted execute privilege to public user on this type, made public synonyms to both, the object type and the function, so anybody connected to the same database would have an access to this functionality.
I supposed that if I supply connection parameters for some other user but the same database when running the function, everything should go smooth. Yeah.
My java code executed ok: it made a connection to the db with some x user, it resolved object type descriptor given (oracle.sql.StructDescriptor), but pl/sql wrapper function reported the error I've mentioned. If I executed the function giving it the connection parameters for same account as where object type was declared, everything went fine.
My final solution is:
Make TWO! connection in java code: 1st for ("jdbc:default:connection:"), 2nd for remote database account.
Use first connection to construct oracle.sql.StructDescriptor
Use second connection to retreive data from remote db

Java- Stored Procedure with Call by Result

Hi Oracle-Community,
I am looking for some example Code how to use a Java-Stored Procedure with Out-Parameters. Don't get me wrong. I dont want to call a Procedure with Out Parameters from Java (there are a lot of examples for this out there) . I just want to implement the Call by Result concept in a Java-Stored Procedure. A Client will call this Procedure with some parameters and the Java Procedure will fill them. So my first question: is this possible? And my second Question: How to implement it?
Greetings.

I found out a solution. It is very simple.
Just defining the parameters as java array (e.g. String[] P1). The first value (P1[0]) is the returned value.
At last just set in JDeveloper in the "Edit Method Signature" Dialog the parametermode to OUT.
The dialog can be found by rightclicking on the stored procedure in the dbexport file. You can read this
in Section 6 Publishing Java Classes With Call Specifications -> Setting Parameter Modes in
Oracle Database Java Developer's Guide.

Java Stored Procedures and Sockets

We need to synchronize data real time b/w Oracle and the legacy HP3000 system.
For sending data from Oracle to HP3000 we are thinking of using Sockets.
We dont know whether a socket connection can be established from the Oracle database level or need to be from the OS level(here Linux)
I heard that Java stored procedures(JSP) can establish socket connection.
Can someone provide me pointers regarding
(a) setting up socket connection from the database
(b) possibility of transferring data via sockets and using jdbc, and how to send data efficiently and if it is wise
Thanks,
Vinoj

I don't have much experience with Lite, but I'm running 9i Personal Edition. Any information about triggers can be found in the "ALL_TRIGGERS" view. You will want to filter out any rows where OWNER = 'SYS' unless you created your triggers as SYS. As for procedures and functions, you can see what you have created in the "ALL_OBJECTS" view where OBJECT_TYPE = 'PROCEDURE' or 'FUNCTION', once again filtering out rows where OWNER = 'SYS'. To see the code of any procedure or function, select substr(text,1,80) from ALL_SOURCE where NAME = 'function name' ORDER BY LINE.
Hope this helps!

Java Stored Procedure / connection JDBC / Server Side / Client Side

Hi,
I would like to know if we can know at the runtime with a JDBC api if the stored procedure is running in client side or in server side ?
THANKS

You wrote
"Java stored procedures -- by definition - are stored in the 8i rdbms. !!"
From the Oracle8i Java Stored Procedures Developer's Guide
Release 8.1.5
A64686-01
"If you create Java class files on the client side, you can use loadjava to upload them into the RDBMS. Alternatively, you can upload Java source files and let the Aurora JVM compile them. In most cases, it is best to compile and debug programs on the client side, then upload the class files for final testing within the RDBMS"
This means that you can create shared classes that are used on both the client and server side. The source does not need to reside within the server (according to their documentation). Please also note the following from the Oracle8i JDBC Developer's Guide and Reference Release 8.1.5 A64685-01 for using the getConnection() method on the server:
"If you connect to the database with the DriverManager.getConnection() method, then use the connect string jdbc:oracle:kprb:. For example:
DriverManager.getConnection("jdbc:oracle:kprb:");
Note that you could include a user name and password in the string, but because you are connecting from the server, they would be ignored."
So if you're coding a shared class that is to run on both the client and server side, you might do something like this:
Connection conn =
DriverManager.getConnection(
System.getProperty("oracle.server.version") == null
? "jdbc:oracle:thin:@hostname:1521:ORCL"
: "jdbc:oracle:kprb:"),
"youruserid","yourpassword");
As stated earlier, the userid and password are supposedly ignored for server connections retrieved in this manner. I haven't tried this yet, but it is documented by Oracle.
Regards,
Steve
null

SQL Server connection in Java Stored Procedures

Is it possible to establish a connection to microsoft sql server through java stored procedures. When I try to create a connetion to SQL Server I am getting the following exception in trace file
java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket.
at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.sqlserver.tds.TDSConnection.<init>(Unknown Source)
at com.microsoft.jdbc.sqlserver.SQLServerImplConnection.open(Unknown Source)
at com.microsoft.jdbc.base.BaseConnection.getNewImplConnection(Unknown Source)
at com.microsoft.jdbc.base.BaseConnection.open(Unknown Source)
at com.microsoft.jdbc.base.BaseDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java)
at java.sql.DriverManager.getConnection(DriverManager.java)
The connection details are correct and I am able to connect when I run the java code externally. Thanks in advance for the help

Can you connect to the MSSQL database from inside Oracle in (say) a SQL*Plus or SQL Developer session?
In other words, is the problem in the Java or the database linkages? Are you using Heterogeneous Services or Transparent Gateways?
Cheers, APC
blog: http://radiofreetooting.blogspot.com

Connecting to SQL Server and MYSQL from a Java stored procedure

hope someone can help with this. i'm trying to connect to different databases (My SQL, SQL Server) from a java stored procedure. when invoking from within an oracle 9i database, i get the java exception error -
"Cannot connect to MySQL server on 135.177.196.75:3306. Is there a MySQL server running on the machine/port you are trying to connect to?java.security.AccessControlException)".
this store procedure works fine when invoked from outside of oracle. any replies would be greatly appreciated. thanks!

the correct drivers have been loaded. it works when called from outside of oracle. only when invoking from within oracle do we get the error message "Cannot connect to MySQL server on 135.177.196.75:3306. Is there a MySQL server running on the machine/port you are trying to connect to?(java.security.AccessControlException)". it sounds like a permissions/security/configuration issue - oracle is not allowing access to the machine/port for the MySQL or SQL Server database. appreciate the responses so far.

Running a Corba Client as a Java Stored Procedure

Hi,
I�m trying to use a Java Stored Procedure running as a Corba Client. I want to use the built in Visibroker ORB on Oracle side and JacORB (or others) on the server side.
How can I init the ORB and get a naming service running not in Oracle but on the server side? Also which jar�s do I need to load into the db with (loadjava) to run the visibroker orb inside the Java Stored Procedure Client?
I�m using Oracle 8.1.7.
Thanks for help ;)

By the way I�m using ORACLE 8.1.7.

How can I implement the connection pool in my java stored procedure

my java stored procedures (in database 'B') have to connect to another oracle database ,let's say 'A'. And how can I implement the behavior like the so-called connection pool in my java stored procedure in 'B', as below.
1. database B, has 2 java stored procedures sp1 and sp2
2. both sp1 and sp2 connects to databse 'A'
whatever I call the sp1 and sp2 and the database 'A' always only one connected session from sp1 and sp2 in database 'B'.
THANKS A LOTS...

my problem is I have a lots of java stored procedures need to cnnect to the remote oracle db, and I hope the remote db can only have a connected session from my java stored procedures in my local db. I try as below
class sp{
static Connection conn=null; //the remote db connection,
public static void sp1(){...}//procedure 1, using conn
public static void sp2(){...}//procedure 2, using conn,too
I can 'see' the 'conn' variable if I invoke the sp1() and sp2() from the same client application(maybe sqlplus). But if I invoke the sp1() from client 'A' and invoke sp2() from client 'B' then the sp1() and sp2() can not see the 'conn' variable for each other. I think it's because the two clients cause oracle to create two instances of the class 'sp' and the sp1() and sp2() located in different instance seperately. Thus the sp1() and sp2() can not see 'conn' for each other. They can only see its own 'conn'.
To connect to the remote db from the java stored procedure is easy but is it possible to connect to the remote db via database link from the java stored procedure at my local db ? If so, then I also archive my goal .
BTW , thanks a lots...
andrew :-)

SSL Connection from a Java Stored Procedure

Hello.
I have a Java stored procedure for sending emails, using the JavaMail API. I need to use gmails as the SMTP server. Google requires that emails sent from their servers must be sent through SSL and must be authenticated.
I'm having trouble in achieving this. Monitoring all traffic sent from the oracle database server, I've noticed that there is a successful connection to google, and a few seconds later the host (where the oracle databse is at), sends a packet telling google to finish the transaction.
I'm wondering if there is any configuration on this issue that needs to be done, or if it is a known Oracle limitation.
I'm using oracle 10.2.0.1.0
Thanks a lot.
Sincerely,
John.

Hello.
I have a Java stored procedure for sending emails, using the JavaMail API. I need to use gmails as the SMTP server. Google requires that emails sent from their servers must be sent through SSL and must be authenticated.
I'm having trouble in achieving this. Monitoring all traffic sent from the oracle database server, I've noticed that there is a successful connection to google, and a few seconds later the host (where the oracle databse is at), sends a packet telling google to finish the transaction.
I'm wondering if there is any configuration on this issue that needs to be done, or if it is a known Oracle limitation.
I'm using oracle 10.2.0.1.0
Thanks a lot.
Sincerely,
John.

How do we connect to a remote database from a Java Stored Procedure?

We have a situation where we are not able to use a PSP (PL/SQL server page) to update a remote database using database link in an Oracle8i database. This is a known bug on 8i and is fixed in 9i. Can this be done using PSP calling a Java stored procedure, which in turn connects to the remote database and performs the update. If so, how we do remote connectivity to another database from the current java stored procedure.

We have a situation where we are not able to use a PSP (PL/SQL server page) to update a remote database using database link in an Oracle8i database. This is a known bug on 8i and is fixed in 9i. Can this be done using PSP calling a Java stored procedure, which in turn connects to the remote database and performs the update. If so, how we do remote connectivity to another database from the current java stored procedure.

Java stored procedures connection context

In my Oracle database there are two java stored procedures:
A java stored procedure P1 having
Connection conn1 = DriverManager.getConnection("jdbc:default:connection")
and
a java stored procedure P2 having
Connection conn2 = DriverManager.getConnection("jdbc:default:connection")
P1 calls P2 using conn1.CallableStatement.
Here is the question: does P2 inherit the connection
context conn1 (so that actualy conn2 = conn1) or P2's transactional
scope is separate from P1's one?
Thanks,
-Eugene

AFAIK, when you run Java in the database, for local SQL data access, there is only one default connection per session, P1 and P2 should share the same transaction context.
Kuassi

Java Stored Procedure in one database connecting to muntiple databases.

Hello,
I created a Java Stored Procedure in one database(Oracle10g) and successfully open a connection to another database(Oracle10g) using Thin JDBC Driver. I want to actually transfer CLOB data from one DB to another DB. I am concern that by opening a connection another database in Java Stored Procedure, might interfere with oracle and destabilize the instance at some point. Oracle JDBC FAQ (Link: http://www.oracle.com/technology/tech/java/sqlj_jdbc/htdocs/jdbc_faq.htm#34_13) stated that Yes it could be done but then mentioned the workaround.(if it could be done why do we need a workaround!!!)
I would like to confirm whether connecting to multiple DB using JDBC Thin Driver in a Java Stored Procedure is supported by Oracle10g or not and whether it has any known issue with it.
Thanks in Advance!
Edited by: user649261 on Sep 16, 2008 8:05 PM

hrishy wrote:
Thanks i have modified the title so its easy to comprehendWrite the two parts mentioned above and post if you get problems with your code.
First write code that calls the stored procedure and test that to make sure that it works.
Then write a simple webservice and test it out to make sure it works. The integration should be trivial after that.

How to get connection of the db lite from java stored procedure?

Hello! All.,
I have a written java stored procedures to assign sequence keys, and update some tables. The procedure is working as per our need by using the following connection information.
try {
int rowFetched = 0;
Class.forName("oracle.lite.poljdbc.POLJDBCDriver");
// connect to the database
Connection conn = DriverManager.getConnection("jdbc:polite:polite",
"system", "manager");
My question is, It is possible in db lite to get a default connections like we use in the enterprise database
conn = new OracleDriver().defaultConnection();
Could anybody please shed some light on this.
Thanks in advance.
Kathir

Hello Upi! out of curiosity if you happen to know the answer for the following, I do appreciate it.
Hello! We are using BC/ADF JClient to select and for any DML operation against Oracle Lite database. We may have more than one user(s) log on to our application, so we requires to authenticate oracle lite user credential using JDBC dynamically.
I am utilizing the features of JCLoginDialog.java and manipulation bc4j.xcfg file. This work real good for accepting username/password credentials dynamically, since we have multiple database in one computer I have to accept DSN name and if possible built my own configuration file.

Java Stored Procedure / Server Side / Client Side / connection

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