Question about 'Generic Database Connector'

Hi SAP IdM Gurus,
I found 'Generic Database Connector' in the list of SAP NW IdM connectors overview.
I'd like to check the capability of this connector in detail.
I'm wondering whether it could provide not only a connectivity of RDBMS, but also custom-developed application using the RDBSM for their ID/Password repository. If it provides only a connectivity of RDBMS, Is there a connector for the custom-developed application using the RDBSM for their ID/Password repository?
My question is that which connector is used for the connectivity of custom-developed application using the RDBSM for their ID/Password repository.
I would really appreciate it if you could answer the question.
Thanks
Kenneth

Kenneth,
The Generic Database connector uses a JDBC connection and allows for the and writing to databases.
That being said, you can also use this connection to set up access to the system or drop access using SQL commands and set them up per the framework.
What specific Database are you working with?
Matt

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HI,
donneskold wrote:
Hi,
I have a very generic question about using Flashback Database.
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udayjampani wrote:
Hi everyone,
greetings of the day
Pl post details of source and target database versions, along with your OS details.
I have few questions about the upgrading database,
In export and import mode
1.can we have new name for the target database,Yes.
2.I think we need to create tablespaces ,do we need to create users as wellYou can create users, but it is not necessary. You need to pre-create tablespaces only if their characteristics/locations on the target are different than on the source.
3.If we are upgrading from 9i to 10g database ,any activity to be perfromed other than thisNot that I am aware of - see the steps in the Upgrade Guide - http://docs.oracle.com/cd/B19306_01/server.102/b14238/expimp.htm
4.How come we get consistent export wetherEnsure the database is started in restricted mode, so users will not be able to access the database during the export.
>
In DBUA mode ( in the same machine only)
1.Do we need shutdown / startup restrict the databaseNo - DBUA will do this automatically for you.
2.How can we move the files to the new locationYou can after the upgrade move the datafiles to wherever you want - use the ALTER DATABASE RENAME DATAFILE (http://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_1004.htm#i2082829) command.
3.Can we change db_name of the databaseI do not believe this is possible with DBUA.
4.Can we use the old database as wellNo - the database will be upgraded by DBUA - there is no "old" database.
>
>
In manual upgration using catupgrd scripts
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3.how to move the database files to the new locationSee above.
4.can we perform this kind of upgrade on a different serverPl elaborate on what you mean by this. You can copy the existing database to a different server (assuming compatible OS) and upgrade it there.
>
>
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Question about generics and subclassing

Hi all,
This has been bothering me for some time. It might be just me not understanding the whole thing, but stay with me ;):
Suppose we have three classes Super, Sub1 and Sub2 where Sub1 extends Super and Sub2 extends Super. Suppose further we have a method in another class that accepts (for example) an AbstractList<Super>, because you wanted your method to operate on both types and decide at runtime which of either Sub1 or Sub2 we passed into the method.
To demonstrate what I mean, look at the following code
public class Super {
public methodSuper() {
public class Sub1 extends Super {
public methodSub1() {
    // Do something sub1 specific
public class Sub2 extends Super {
public methodSub2() {
     // Do something sub2 specific
public class Operate {
public methodOperate(AbstractList<Super> list) {
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       // The intention is accessing methods of Sub1 or Sub2, depending on whether this was a Sub1 or Sub2 instance (instanceof, typecasting)
}The following two methods seem impossible:
Typecasting, because of type erasure by the compiler
Using the instanceof operator (should be possible by using <? extends Super>, but this did not seem to work.
My question now is: How to implement passing a generic type such as AbstractList<Super> while still making the methods of Sub1 and Sub2 available at runtime? Did I understand something incorrectly?

malcolmmc wrote:
Well a List<Super> can contain elements of any subclass of super and, having obtained them from the list, you could use instanceof and typecast as usual.I agree with you on this one, I tested it and this simply works.
Of course it would be better to have a method in Super with appropriate implementations in the subclasses rather than use distinct method signatures, instanceof and casting isn't an elegant solution. Alternatively use a visitor pattern.Not always, suppose the two classes have some similarities, but also some different attributes. Some getters and setters would have different names (the ones having the same name should be in the superclass!). You want to be able to operate on one or the other.
Generics doesn't make much difference here, exception it would be more flexible to declare
public methodOperate(AbstractList<? extends Super> list) {Which would alow any of AbstractList<Super>, AbstractList<Sub1> or AbstractList<Sub2> to be passed.I tried it and this also works for me, but I am still very, very confused about why the following compiles, and gives the result below:
public class Main {
     public static void main( String[] args ) {
          AbstractList<Super> testSub = new ArrayList<Super>();
          testSub.add( new Sub1( "sub1a" ) );
          testSub.add( new Sub1( "sub1b" ) );
          accept( testSub );
     private static void accept( AbstractList<? extends Super> list ) {
          for ( int i = 0; i < list.size(); i++ ) {
               Super s = list.get( i );
               System.out.println( s.overrideThis() );
public class Sub1 extends Super {
     private String sub1;
     public Sub1( String argSub1 ) {
          sub1 = argSub1;
     public String overrideThis() {
          return "overrideThis in Sub1";
     public String getSub1() {
          return sub1;
public class Sub2 extends Super {
     private String sub2;
     public Sub2( String argSub2 ) {
          sub2 = argSub2;
     public String overrideThis() {
          return "overrideThis in Sub2";
     public String getSub2() {
          return sub2;
public class Super {
     public Super() {
     public String overrideThis() {
          return "OverrideThis in Super";
}With this output:
overrideThis in Sub1
overrideThis in Sub1Even using a cast to Super in Main:
Super s = (Super) list.get( i );does not return the Sub1 as a Super (why not??)
Sorry for the long code snippets. I definitely want to understand why this is the case.
(Unwise, I thing, to use Super as a class name, too easy to get the case wrong).OK, but I used it just as an example.

Another question about generics

Consider the following hierarchy of classes:
class Fruit {...}
class Orange extends Fruit {...}
class Apple extends Fruit{...}
Now I need to declare a collection wherein I could store any type of Fruit (including its derivated classes), but also gather some fruits.
I hare read that for reading I need to declare the collection as follows:
Set<? extends Fruit> fruitSet = new HashSet<Fruit>();
and for writing I need the following declaration:
Set<? super Fruit> fruitSet = new HashSet<Fruit>();
My question is, is there an efficient way to declare the collection so that both operations be feasible in the class? In the current version, I use generic method and need to re-cast for some calls.
Can anyone help?

What they're talking about is the fact that parameterized types are not covariant. You can't treat a List<Rectangle> as a List<Shape> because they are not the same thing. Arrays on the other are covariant, you can treat a Rectangle[] as a Shape[].
No, with your example it will not generate a compile time error, but I do see what you're getting at.
public void readFruit(Set<Fruit> fSet) {
// snip
Set<Apple> fruits = new HashSet<Apple>();
readFruit(fruits); // error because Set<Apple> is NOT a Set<Fruit>It has nothing to do with whether or not fruits contains Apples and Oranges, it's how fruits is declared. While a Set<Fruit> may contain Apples and Oranges a Set<Orange> is not a Set<Fruit>. So if you attempt to pass a Set<Orange> to a method that takes a Set<Fruit> you might as well be trying to pass an int to a method that accepts a String, they're not the same, there is no is-a relationship. So this is what you do:
public void readFruits(Set<? extends Fruit> fSet) {
// snip
// All work because it will take any Set<E> where E extends Fruit.
readFruits(new HashSet<Fruit>());
readFruits(new HashSet<Apple>());
readFruits(new HashSet<Orange>());What this says is that fSet can be any Set<E> where E is a subtype of Fruit. It doesn't matter what implementations the Set actually contains. If it's a Set<Fruit> and it contains Apples, it doesn't matter, it's simply allowing you to pass a Set<Apple> or Set<Orange> as opposed to only being able to pass a Set<Fruit>.

Maybe a dumb question, about which power connectors to use, but....

This may sound like an incredibly dumb question, but here goes anyway....
I upgraded my system a few weeks ago, and will be slapping in a new ATI X850 Pro AGP card in a few days. My current graphics card is a p.o.s. Radeon 9550, so it doesn't have its own power connector or even a fan. My PSU is a dual-rail Antec model, and I'm wondering if it should matter any about how many or which devices I have connected to each power cable set. My psu came with cables to attach, only 2 of the 4 though are the 4-pin molex - the other 2 are pci-e power connectors I believe. Should it make a difference which or how many devices I connect to each cable? For ease of plugging in, I believe my DVDRW and CDRom are using 1 cable, and my ide drive and floppy are using the other cable. Also, I have a pci fan and a case fan running off 1 or the other. I'm likely to jump the power cable for the video card off the one the hard drive is using, unless someone has some suggestion to offer to the contrary.
If it makes a difference, can anyone recommend how they would have them connect?
My list of devices to plug in would be:
1)IDE HDD
2)Floppy
3)CDRom
4)DVDRW
5)Case Fan
6)PCI Fan
7)Video Card
Thanks for any thoughts! SAB - you seem to be the man on builds.....any ideas?

Well, I put the new card in and connected it on a cable with the optical drives. Also, I had unwittingly connected my cdrom on the same ide channel as my hdd , so I changed that so both optical drives are on the secondary ide.
So far, so good. 3dMark03 jumped up from 3300 with an overclocked Radeon 9550 to 10570 with the stock Radeon 850 Pro
I wish I could find some local source to purchase additional molex cords for my Antec SmartPower 2.0 psu, though - I've got 2 more 'outlets' just sitting there on the psu doing nothing, because the other cables are for pci-e, and I'm not using pci-e...... If I could buy some additional molex cables to plug in like the ones that came with it, I could have the vid card on its own cable....

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The bean is modified from here to add exception cactching and 'fix' other problems along the way.
http://forum.java.sun.com/thread.jspa?threadID=727979 (thanks evnafets)
The results list is genericified(!) to avoif unchecked calls (casting) in this line result.add(article);
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                article.setEmail(rs.getString("email"));
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        finally {
            try {
                if (rs != null) rs.close();
            } catch (Exception e) {
                //error message goes here
            try {
                if (stmt != null) stmt.close();
            } catch (Exception e) {
                //error message goes here
            try {
                if (conn != null) conn.close();
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                //error message goes here
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Im not too sure what a context does or what im doing with it here. My current understanding is that it allows concurrent access of the database.
        Context initContext = new InitialContext();
        Context envContext = (Context) initContext.lookup("java:/comp/env");
        DataSource ds = (DataSource) envContext.lookup("jdbc/mySite");This section im having trouble with too.
As I see it:
I set what my sql query will be;
get a connection @ conn
now im not too sure what stmt is getting, is it getting ready to send the query.
stmt does not have an executeQuery() method, so im never actually sure when the sql query gets sent to the database. I have subbed with execute() but it does not take any arguments so the problem of not sending anything remains.
            String sql = "SELECT * FROM news, users WHERE news.user = users.username";
            conn = ds.getConnection();
            stmt = conn.createStatement();
            rs = stmt.executeQuery(sql);Any help greatly appreciated.

Some questions that would be of great help if
answered:
Im not too sure what a context does or what im doing
with it here. My current understanding is that it
allows concurrent access of the database.
Context initContext = new InitialContext();
Context envContext = (Context)
Context) initContext.lookup("java:/comp/env");
DataSource ds = (DataSource)
aSource) envContext.lookup("jdbc/mySite");
Nops, it has nothing to do with concurrent access. You use tomcat to set up a Connection Pool. This causes the tomcat server to create a pool of reusable connections on startup. The connection pool (or set of Connection objects) are given a name and the server binds the set of objects to this name in a 'registry'.
From the code, you use jndi to access the Connections from the pooled objects. While doing so, you have to provide the jndi name against which this object pool is bound to.
You'll be more clear when you read the fllowing resources.
http://java.sun.com/products/jndi/
http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html
>
This section im having trouble with too.
As I see it:
I set what my sql query will be;
get a connection @ conn
now im not too sure what stmt is getting, is it
getting ready to send the query.Yes something of that sort - basically it provides you a wrapper which can accept your query, use the connection object to access the db, execute the query and return a result set.
stmt does not have an executeQuery() method, so im
never actually sure when the sql query gets sent to
the database.er....it has and that's what you use in your code. (http://java.sun.com/j2se/1.5.0/docs/api/java/sql/Statement.html#executeQuery(java.lang.String))
I have subbed with execute() but it
does not take any arguments so the problem of not
sending anything remains.Hmmm....the execute() method is for a different purpose and it does accept arguments (http://java.sun.com/j2se/1.5.0/docs/api/java/sql/Statement.html#execute(java.lang.String))
>
            String sql = "SELECT * FROM news,
users WHERE news.user = users.username";
conn = ds.getConnection();
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);Any help greatly appreciated.ram.

Question about a database saving

Hey all. First off, I just started playing with databases yesterday, so forgive my question if it seems obvious/stupid.
I finally got JDBC working with HSQLDB (I wanted something portable), and wrote some code to connect to the database, create a table, and input/retrieve data from the table. The only way I could get the database to retain the stuff I wrote if I opened it the next time was to use statement.execute("SHUTDOWN"). Now this is fine, but is there any way to have the database save all the info besides using the shutdown command?
When I didn't use the shutdown command, the next time I connected to the database and tried to read values from the table I made before, I got an error. When I did use the shutdown command, it printed them right out for me, so I'm assuming that IS my problem (It very well may not be).
Anyway, I had a hard time explaining, so if any further explaination is needed please let me know. And thank you in advance!
Edit: If sample code would be nice, just say so and I will post a couple examples of the issue.

Alright. I looked through both. The commit thing will come in very handy, but I think I described the problem in slightly the wrong way. It is my understanding that autoCommit is set to a default of true. So I will set it to false and try to make my program employ ACID (Which might be kind of hard, I'm new at this). But I believe my testing program had a slightly different problem. Since there's not much of a way to distribute my current database, I'll try to describe the problem instead of posting the code.
I have a databse with a table created. It can hold an employee name as well as their ID number (Not for my real program, I was following a tutorial). I had one simple add statement, that added an employee name and an ID. If I run the program with
st.execute("SHUTDOWN");at the end, every time I run the program I will get an additional copy of that data every time I run it. Without the shutdown, I can run the program 100 times and still only have as many entries as I had before.
That's kind of what I meant by the database not saving. It may be commiting it, but if I close without the shutdown command, it doesnt seem to change the database.
Am I coding something incorrectly, or is this intended behavior? The question may seem slightly weird and useless, but what if someone alt-f4ed out of a program? I don't see how the shutdown command could be issued then. Again, sorry if my question is hard to understand, describing database problems isn't easy for me.

A question about Generic Extractor

Hi everyone,
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best regards,

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