Start with java stored procedure in SQLDeveloper

Hi,
i'm a newbe in writing PL/SQL stored procedures. Thats the reason to wont to write some java stored procedures for an ORACLE 10g. I'm using the SQLDeveloper. My Problem is: how can i start to write java stored procedures. Where have i to put them?
Can somebody help me?
10x
cu nanostruct

For Java Stored procedures you'll need to use JDeveloper. For SQL Developer, there is a viewlet and a tutorial on this page:
http://www.oracle.com/technology/products/database/sql_developer/index.html
Sue

Similar Messages

Performance problem with java stored procedure

hi,
i developped a java class, then I stored it in Oracle 8.1.7.
This class contains several import of other classes stored in the database.
It works, but the execution perfomances are disappointing. It's very long. I guess, that's because of the great number of classes to load that are necessary for my class execution.
I tried to increase the size of the java pool (I parameter 70 Mo in the java_pool_size parameter of the init.ora), but the performance is not much better.
Has anyone an idea to increase the performance of this execution of my class ?
In particular, is there a way to keep permanently in memory the java objects used by my class ?
Thanks in advance
bye
[email protected]
null

before running Java, the database session needs to be Java enabled; this might be the reason why it is taking so long. If this is the case, you should see an improvement in subsequent calls, once a database session is Java enabled, other users can benefit from it.
Kuassi
I have some performance issue with java stored procedure. Hope some one will be able to help me out. I'm using java stored procedures in my application and basically these procedures are used to do some validation and form the XML message of the database tables. I have noticed that when I call the PL/SQL wrapper function, it is taking time to load the java class and once the class is loaded the execution is faster. Most of the time is spent for loading the class rather than executing the function. if I reduce the class load time, I can improve the performance drastically. Do any one of you know how to reduce the class load time. The following are the platform and oracle version.
O/S: IBM AIX
Oracle: 8.1.7

Deploy package with Java Stored Procedure without JDeveloper

I have a set of Java Stored Procedures deployed as a package on a Oracle 8i server. Everything works fine in my development environment, and now I would like to deploy the same package in the customers runtime environment. Both environments are running Oracle 8i rel 2 on NT.
Is there a simple way to use the JDeveloper .prf deployment profile without installing JDeveloper in the customers environment?
If not, can I the get the .jar files and .sql scripts from JDeveloper to create the call specs and package bodys?
I guess JDeveloper must have this information, and my idea was then to write a script using loadjava and SQL*Plus.
Regards,
Tom Bjerre

you would not be able to take just the deployment profile and run it outside JDeveloper.
You would be able to create archive of all java classes in the package using Deployment Wizard in JDeveloper.
Then you can load the jar file using the utilities in 8i.
JDeveloper does generate the SQL for CALL specs etc ., at the deployment time and it is printed in MEssage Viewer along with other information.
Hope that info is useful for you
raghu

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

Problems with java stored procedure.

I have a java stored procedure that uses a package called RmiJdbc
which allows calling remote JDBC data sources from any java capable
machine.
I've loaded the RmiJdbc classes into oracle via the loadjava
command and everything seems to come up valid.
The stored procedure does a Class.forName() to get the driver
registered, than attempts to connect to the remote RMI driver.
The particular line it dies on is this (see the error below):
c = DriverManager.getConnection("jdbc:rmi:" + rmiHost + "/" + url);
A mangled version of this (minus the Oracle specific stuff) works
from the command line correctly. Can somebody point me in a
direction to figure out what's going on here?
THanks,
Eric
Oracle9i Enterprise Edition Release 9.0.1.3.0 - 64bit Production
With the Partitioning option
JServer Release 9.0.1.3.0 - Production
ORACLE_HOME = /oracle/v901ee
System name: HP-UX
Node name: athena
Release: B.11.00
Version: A
Machine: 9000/889
Instance name: PASDB2
Redo thread mounted by this instance: 1
Oracle process number: 13
Unix process pid: 7839, image: oracle@athena (TNS V1-V3)
*** SESSION ID:(8.547) 2002-08-15 15:41:27.221
java.rmi.UnmarshalException: Error unmarshaling return; nested exception is:
java.lang.NullPointerException
java.lang.NullPointerException
at sun.rmi.server.LoaderHandler$LoaderKey.<init>(LoaderHandler.java)
at sun.rmi.server.LoaderHandler.lookupLoader(LoaderHandler.java)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java)
at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java)
at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java)
at java.io.ObjectInputStream.inputArray(ObjectInputStream.java)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java)
at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java)
at java.io.ObjectInputStream.inputObject(ObjectInputStream.java)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java)
at sun.rmi.registry.RegistryImpl_Stub.lookup
at org.objectweb.rmijdbc.RJConnection.<init>(RJConnection:83)
at org.objectweb.rmijdbc.Driver.connect(Driver:135)
at java.sql.DriverManager.getConnection(DriverManager.java)
at java.sql.DriverManager.getConnection(DriverManager.java)
at TurnoverInfoPlusInterface.insertInterfaceRecords(TurnoverInfoPlusInterface:53)
java.sql.SQLException: Error unmarshaling return; nested exception is:
java.lang.NullPointerException
at org.objectweb.rmijdbc.Driver.connect(Driver:140)
at java.sql.DriverManager.getConnection(DriverManager.java)
at java.sql.DriverManager.getConnection(DriverManager.java)
at TurnoverInfoPlusInterface.insertInterfaceRecords(TurnoverInfoPlusInterface:53)

More info...I'm also seeing "ORA-03113: end-of-file on communication channel". I checked the user trace file and didn't get much help...it indicated an "exception signal: 11" and core-dump type stuff that had no meaning to me.

Invoking Unix command with java stored procedure

Hi,
I have a perfectly working environment and now I am trying to replicate the same in another server. I have a java stored procedure which invokes the Unix command using java Runtime.exec() in my code named "run". I am sure that the code is called and the java class run is resolved in oracle as I could see that in dba_java_resolvers dictionary. But I am not sure whether the function in java is called or whether a exception is thrown. how to identify this? Could there be any thing to do with settings in oracle side? please help me.
Thanks in advance,
Marutha

Hi,
Do you get any output while running the code?
I'm testing similar solution and if there are any errors or Oracle can't execute the program due to permissions or other issues the error information will be displayed. Also in the Java class itself you need to catch exceptions and print stack trace to standard output.
declare
x number;
begin
dbms_output.enable(1000000);
dbms_java.set_output(1000000);
x:=system_command.run_command('testconnect.sh');
dbms_output.put_line('Returned value='||x);
exception
when others then dbms_output.put_line('Sql error='||substr(sqlerrm,1,250));
end;
<system_command.run_command> - replace with a call to your java stored procedure.

Transformation to WORD from XSLT with java stored procedure - PROBLEM

Hi all,
I'm building a java function for transformation of xml document through .xslt scheme to WORD. I use xalan.
Now, everything works fine if I run the java function on the client VM
But on the server where the classes needed for the transformation are loaded, it crashes with a strange exception
nulljava.lang.NullPointerException
Now I've located the problem, and it occurs in this line in the java code:
transformer.transform( new StreamSource(xmlFile), new StreamResult(osIzlez));
(where xmlFile is the source for the transformation, and the transformer is configured with the proper .xslt scheme, osIzlez points to a bytearraystream of a blob in the database where the .doc file is going to be generated and loaded)
I also found out that the NullPointerException occurs because the transformer is actually null on the server (although it's configured with the .xstl scheme and should not be null ! ), but on the client it's never null!
What could be the problem, does anyone have an IDEA?
Edited by: Daniel Kiprijanovski on 17.9.2009 03:07

OK, i found out that there's a reported bug about that exception on the java VM. I found a way arround it however.
Thanks,
Daniel K.

Perfomance problem with java stored procedure

hi,
i developped a java class, then I stored it in Oracle 8.1.7.
This class contains several import of other classes stored in the database.
It works, but the execution perfomances are disappointing. It's very long. I guess, that's because of the great number of classes to load that are necessary for my class execution.
I tried to increase the size of the java pool (I parameter 70 Mo in the java_pool_size parameter of the init.ora), but the performance is not much better.
Has anyone an idea to increase the performance of this execution of my class ?
In particular, is there a way to keep permanently in memory the java objects used by my class ?
Thanks in advance
bye
[email protected]
null

Hello again,
I read the documentation of 9i and found some hints about different TCP/IP socket handling of 9i and a standard JVM.
There are some parts that give hints but I couldn't find a sample code to show how to handle the differences.
Could anyone tell me how to handle the differences or give some links to sample code?
Thanks
Detlev

Using Java Resources with Java Stored Procedures

Hi folks,
Hope someone can help out with this one.
I have a java source file called PdfFormExtractor.sql. In that file I have a definition similar to.
CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED "PdfFormExtractor" as
import com.adobe.pdf.FormDataFormat;
import com.adobe.pdf.FormType;
import com.adobe.pdf.PDFDocument;
import com.adobe.pdf.PDFFactory;
etc, etc.
};I have loaded a number of Java jar files into the DB with the following command:
   CALL loadjava -v -s -r -u db_user_name/db_password@SID -jarasresource name_of_jar_file.jarMy PdfFormExtractor class compiles with errors as it does not seem to detect the class files located in the jar files which located in the schema.
I have used the following query and determined that the JAR files are valid and present in the schema.
SELECT object_name, object_type, status, timestamp
FROM user_objects
WHERE (object_name NOT LIKE 'SYS_%'
         AND object_name NOT LIKE 'CREATE$%'
         AND object_name NOT LIKE 'JAVA$%'
         AND object_name NOT LIKE 'LOADLOB%')
   AND object_type LIKE 'JAVA %'
ORDER BY object_type, object_name;One solution appears to be to omit the "-jarasresource". This appears to cause loadjava to unpack the jar files. Unfortunately this means that you must drop any java objects from the same path as which they were created. Ideally I'd like to just load the java files and leave them as resources.
My question then is how do I get my source code to recognize that the files are in the schema. I thought this would be picked up when I do @PdfFormExtractor.sql from a sqlplus prompt (assuming the jars have been loaded and unpacked in the schema)
because I specified RESOLVE in the source definition
If anyone has any ideas they are most welcome as I've been stuck on this for the past couple of hours.
Regards
Kris
-- http://kristianjones.blogspot.com

I advise you to post this thread on the Java forum JDeveloper and ADF
Regards.

Returning a serializable object from a java stored procedure

[Server : Oracle 8.1.6 on WinNT4 server. Client : java 1.2.2 on WinNT4 workstation.]
I am attempting to use a java stored procedure to build a complex serializable java object on the database (to minimise number of requests/queries on the network) and then return this object in response to the original query.
I have it writing a BLOB by means of
OutputStream os = retval.getBinaryOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(os);
oos.writeObject(v);
return retval;
where retval is a blob selected from a dummy table (created for this purpose) and v is a vector containing only serializable objects.
However, on the client side when I attempt to recover the object by
OracleResultSet rs = (OracleResultSet)stmt.executeQuery("SELECT javatest FROM DUAL");
oracle.sql.BLOB blob=rs.getBLOB(1);
InputStream inp = blob.getBinaryStream();
ObjectInputStream oinp = new ObjectInputStream(inp);
Vector retval = (Vector)oinp.readObject();
I get an exception telling me that the input stream does not contain an object at the line containing new ObjectInputStream(inp);
The full exception is :
java.io.StreamCorruptedException: InputStream does not contain a serialized object
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:731)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:165)
at eRespond.DBLayer.JavaStoredProcedures.testdbobj.test2(testdbobj.java:143)
at eRespond.DBLayer.JavaStoredProcedures.testdbobj.main(testdbobj.java, Compiled Code)
I've checked that the returned blob is non-null, and that oracle.sql.BLOB is used throughout.
Any thoughts?
Thanks,
mark.

Firstly I guess to be able to new B() as a Thread, B
should extends Thread.
Secondly the constructor should not have any return
type:
public B(String cmd)
instead of
public void B(String cmd)
Lastly there is no need to override the start() method
if all it does is to call the superclass. The subclass
automatically inherits the method.
Hope this helps.thanks for replying so soon...
yes, you are right, it should extends Thread and it is, i forgot to out in this example... my mistake!
i'll try the construnctor thing to see if it works. bare in mind that i working with java stored procedures, it should work even so, right?
thanks

How to use a Java Thread in a Java Stored Procedure?

I am working with java stored Procedures but i have a problem when i use threads.While the thread is running all the processes are blocked because the thread is not detatched.I don't know if it is impossible to use Thread in a java stored procedure.i made many researches but didn't find information about this case of Thread.If someone knows what to do in this case it will be helpfull for me.Thanks

The JAR is already load by using CREATE JAVA RESOURCE ... or "loadjava -resolve –force -user p/p@SID –genmissing -jarasresource MyJar.jar"
If we can create a resource by SQL or loadjava, how can I use it in my java code?
Edited by: 847873 on 28 mars 2011 06:05
Edited by: 847873 on 28 mars 2011 06:07

SQLJ and Java Stored Procedures

Hi,
Am very sorry, if I am taxing you too much with Java Stored Procedures!!
However, I have struggling with it for more than 3 days or so.So please bear with me
I am facing a peculiar problem on the subject.
I have deployed a Java Stored Procedure using Connection name as "JDBC" through JDev.
My client calls the Stored procedure getDept as follows:
int deptNo = 0;
String deptName = null,
deptLoc = null;
#sql {
call sample.getDept( :out deptNo,
:out deptName,
:out deptLoc)
In my project properties , in SQLJ tab, when I select "JDBC" as my connectionName, and leave the ContextName blank(i.e. DefaultContext), I get the following error :
Error: [26] Not Found: SAMPLE.GETDEPT There is no stored procedure with this name
When I leave the ConnectionName as blank (which I suppose means donot do online checking!!), it compiles OK.
Howvever, it is not able to run my SQLJ file!!
Cannot figure out why this is happening.Please help!!
TIA
Sandeep
null

Looks like Java stored procedure don't support the return of result sets to the client. Given the complexity and non-generic 'cursor ref' approach that Oracle has always implemented, I guess it is not too surprising. I suggest throwing the select into a work table and pulling the rows from there. If you are in a COM capable environment, you can use 0040 to get back a Dynaset, but be aware, it is live!
Good luck.
Cal

Parameter length limition passing to java stored procedure! help

hi:
i am working with java stored procedure to do some resource consuming work. i have to pass a long string (varch2) or bytes(log raw) which is larger than 32k which is the limitation
set by oracle.
is there a walk around?
another question:
i have to call java stored procedure from session beans ( weblogic app server) and how can i make sure the code
in session beans and that in java stored procedures to be in
the same transaction?
regards
daniel wang

Hi Daniel,
In answer to your first question: use a CLOB (for the long string)
and a BLOB (for the long raw). Do a search for CLOB and BLOB at the
Technet site:
http://technet.oracle.com
There are lots of resources including documentation and sample code.
In answer to your second question: first, let me say that the J2EE
forum is more suitable for that question (I haven't looked yet, but
you may have posted there as well!). Anyway, you need to set an
appropriate transaction attribute in your "ejb-jar.xml" descriptor
file for your session bean. If you want to make sure that the
session bean and java stored procedure participate in the same
transaction, I suggest using "Required", as in:
<trans-attribute>Required</trans-attribute>
Hope this helps.
Good Luck,
Avi.

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.

How to retrieve 'long' column with 32K length in Java stored procedure

For some reasons, we are not using CLOB, BLOB, or BFILE to store large objects and I have to live with LONG. So I wrote a Java stored procedure to insert, select and manipulate a LONG column by retrieving the LONG into a java.lang.String class (which happens to be the Java class mapped to the LONG SQL datatype). It all works fine as long as the length of the value being retrieved is less than the magic figure of 32767 bytes (which is the restriction on LONG and VARCHAR2 datatype in PL/SQL as well). So looks like Oracle's implementation of the JVM limits String values to a max of 32767 bytes. Suggestions on how to overcome this limitation (other classes that you suggest or do I have to move to files)?
Thanks,
Jeet
null

the jvm has nothing to do with it ...
this is a pol/sql limitation on parameters in stored procedures.
and java stored procedures require a clal spec that makes the j-s-p look like a pl/qsl stored proc.

Start with java stored procedure in SQLDeveloper

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