Connection Object

Dear Friends
Basically i am new to Jdeveloper
I have created Master Detail form using Business Object.
Now i want to add one customize form to Detail form. For that i need Connection object. So how can i create Connection object . pl. help it is urgent for me.
Can any body know from where i can download API for Jdeveloper.
Rakesh

Rakesh:
I need a few more clarifications.
Basically I had created DEPT/EMP master detail relation ship. Is this a Business Component project? I.e., did you go through BC4J wizards to create Entity Objects, View Object, etc.? Or are you doing this all in JDBC directly?
What i want if any body is clicking
on detail form(emp) , Employee Education should be display in another form. I have made throgh my own java coding(using java.sql).I take it you're not using JClient, but built your own application using Swing. Is this correct?
Thanks.
Sung

Similar Messages

How to store Connection object and call it from other programs.

Hi,
I am trying to connect to the database, store the connection object and use this connection object from other standalone java programs.
Can any one tell me how to do this? I've tried in the following way:
In the following program I am connecting to the database and saving the connection object in a variable.
public class GetKT2Connection {
   public static void main(String[] args) {
      String url = "jdbc:odbc:SQLDsn;
      String dbUser = "sa";
      String dbPwd = "sa";
      Connection kt2conn = Connection connection = java.sql.DriverManager.getConnection(url, dbUser, dbPwd);
      if(kt2conn == null) {
         System.out.println("Database Connection Failure!");
      else {
         System.out.println("Connected to Database...");
     GetKTConnectionObj.storeKT2ConnectionObj(kt2conn);
} Here is the program to save connection object in a variable.
public class GetKTConnectionObj {
   static Connection kt2Connection = null;
   public static void storeKT2ConnectionObj(Connection conn) {
   kt2Connection = conn;
   public static Connection getKT2ConnectionObj() {
   try {
      return kt2Connection;
   catch(Exception e){
      System.out.println(e);
return null;
}Now from the following code I am trying to get the connection object that is stored. But this is throwing NullPointerException.
public class Metrics_Migration {
public static void main(String args[]) {
     try {
    java.sql.Connection connection_1 =   GetKTConnectionObj.getKT6ConnectionObj();
     catch(Exception e){
}

kt2Connection is null. You need to store it first, to make it not null. Otherwise it will stay null forever. And why on earth are you trying to do this THIS way?
If you are running the two applications separately, it wont work either.

Error in creating connection object

Dear Experts
When I am creating connection object using ES55 , I get Stop message saying : " Alternate ID not supported" and when i see Help it indicates : An alternative indicator is active in Customizing of the functional location. This functionality is not supported for connection objects and device locations
what could be going wrong
Plesae suggest me the solution
Thanking you in advance
warm regards
narasimha

Hi,
Please check the following settings in SPRO:
Plant Maintenance & Customer Service - -Master Data in Plant Maintenance & Customer Service --Technical Objects --Functional Locations --Alternate Labeling of Functional Locations - - Activate Alternative Labeling --
In this setting pls inactive the setting for Alt.Label.Then go to ES55 and try.It will work.
Thanks,
Banasri Mitra

Duplicate check for Connection Objects in CRM

Hi,
I want to implement a duplicate check for connection objects in CRM. The duplicate check shall use the address of the connection object and perhaps additonal attributes. I have found a duplicate check for business partners using the basis address service and TREX as index pool. However, I couldn't find a similar functionality for connection objects. Does somebody know:
1) How to implement a duplicate check for connection objects which is based on the address of the connection object?
2) Is there a way to use the TREX-based duplicate check which is integrated into the basis address service for connection objects?
Thanks in advance!
Best regards,
Frank

I also have a requirement to check for duplicate address at connection object level and we are using SAP data servies to validate the address. Can anyone share their experience.

Creating logical/virtual connection object from physical connection

Can anybody help me what is creating logical/virtual connection object and how to create it from physical connection in java ??
Thanks in advance...

WHile you are waiting for an answer, you might want to review the related Oracle documentation:
For 10g, all docco is at http://www.oracle.com/pls/db102/portal.portal_db?selected=3 and docco I suspect will help you is "Java Developer's Guide" and "JDBC Developer's Guide and Reference"

Statements in Connection Object

Hi All,
I am using Oracle 8i as my database and JDBC 2.0 for connecting my Java program to Oracle.
I know that from single connection object I can create multiple statements and execute them. But can any one say me what is the maximum no. of statements which can be created from a single connection object? Or is there no limit on that?
..Raj

Only limited by your memory, no theoritical limit

Connection Object filed in O/P file

Dear Experts,
As per my requirement, i need to get the connection objects fields in output Excel file, but right now, through el06 they are generating mass data, but in that output file one filed is not coming, but it was maintained in connection object .
now i want to get that filed ( filed name "other city" ) in my excel sheet also.
can any body have clue , how to get that filed in my output file also.
cheers..

Hi Avinash,
Thanks for reply, my req is, i have to give the data to meter readers, to which location they have to go , for collecting the MR readings, in that list i need all the fields which i maintained in CO. i guess they didn't maintained one filed earlier, now i want to have one filed in o/p excel sheet.
hope i made clear.
Cheers.

Threaded Queries from Single static Connection object - Good approach?

Hi,
I need to generate a report where I need to query count(1) from over one hundred tables from oracle 10g database. I am not updating or deleting any record.
My approach is to use a single static connection object and create one thread for each table and capture the result back into a static hashtable.
But still, I am not getting any substantial performance improvement. Earlier, my report took 40 minutes, when it was non-threaded and now it takes 30 minutes.
Is there anything more I can do to make my report get the counts faster? Will a connection pool help?

Tolls wrote:
jschell wrote:
I was told by the DBA that count(1) works faster than count(*)....that's why....Unlikely. Certainly not true in current versions of Oracle if that is the source.Not unlikely, actually not true. Beneath the hood Oracle turns a count(1) into a count(*) in order to deal with this. Why? Because count(1) is turned into count(*) in order to avoid it being slower (Oracle 7 was the last time count(1) was different). And the reason generally given is because so many people were mistakenly using count(1) thinking it performed better that they decided to put in the "conversion" to fix the silly queries.
I think this it the [Ask Tom|http://asktom.oracle.com/pls/asktom/f?p=100:11:109792721681931::::P11_QUESTION_ID:1156159920245] link I used last time this came up here.
I knew all that, but I missed that the OP had specified the database vendor and version.

Passivation of Connection Object in Stateful Session Bean

Hi all,
I am developing a Stateful session bean that has a Connection object as its instance variable. And this bean starts transaction that spans across multiple method calls and finally either commit or rollback.
BeanClass
UserTransaction utx;
Connection conn;
ejbCreate()
allocateconnection();
ejbRemove()
closeconnection();
ejbActivate()
allocateconnection();
ejbpassivate()
closeconnection();
StartTransaction()
utx = getusertransaction();
utx.begin();
Method1()
do something with database
Method2()
do something with database
CommitTransaction()
utx.commit();
For example, the typical usage of this bean would be:
bean.StartTransaction();
bean.Method1();
bean.Method2();
bean.CommitTransaction();
Here are my two questions:
1. General Question: In order for a Connection object to join a Transaction, Do I have to create the connection after the transaction has started?
2. If the answer to the above question is yes, then: I understand that when this bean get passivated, the UserTransaction instance object would be passivated. And since the connection object can't not be passivated, I have to recreate the connection object in ejbactivate() method, would newly created connection participate in the same Transaction that was being passivated and now activated?

>
Hi all,
I am developing a Stateful session bean that has a
Connection object as its instance variable. And this
bean starts transaction that spans across multiple
method calls and finally either commit or rollback.
BeanClass
UserTransaction utx;
Connection conn;
ejbCreate()
allocateconnection();
ejbRemove()
closeconnection();
ejbActivate()
allocateconnection();
ejbpassivate()
closeconnection();
StartTransaction()
utx = getusertransaction();
utx.begin();
Method1()
do something with database
Method2()
do something with database
CommitTransaction()
utx.commit();
For example, the typical usage of this bean would be:
bean.StartTransaction();
bean.Method1();
bean.Method2();
bean.CommitTransaction();
Here are my two questions:
1. General Question: In order for a Connection object
to join a Transaction, Do I have to create the
connection after the transaction has started?Strictly NO. In fact, the connection is obtained first and then can a transaction begin.
2. If the answer to the above question is yes, then: I
understand that when this bean get passivated, the
UserTransaction instance object would be passivated.
And since the connection object can't not be
passivated, I have to recreate the connection object
in ejbactivate() method, would newly created
connection participate in the same Transaction that
was being passivated and now activated?
The answer to first question being NO, your argument for question 2 does not hold true. According to the EJB specification, a stateful session bean can only be passivated between the transaction and not within a transaction. Your implementation for the stateful EJB is good to work.

How many Connections objects????

Hi
I am creating a GUI application which contains several GUI classes(e.g. frames and dialog boxes) which are instantiated depending on the choice of the user. I also have a Database class which contains the code which enables the connection to the database. The code creating the connection is within the constructor,therefore creating a connection whever I create an instance of the database class.
Most of the GUI classes need to obtain or update information held in a database.
Currently I create an instance of the Database class in every GUI class which needs to access the database. Obviously however every time a new database object is created, a new connection is also created.
I am worried about all these database objects all containing their own connections.
Should I have just one connection object in existence at any one time?
If so,can I declare the Connection variable in the Database class as static?
Any help/comments would be gratefully received.
LGS

From what I know, there should be no problem with maintaining multiple connections to the database. This is a property of the database itself, most allow about 256 connections. The only problem you face is a lost transaction. As long as you keep the queries serialized, you shouldn't encounter any problems.
If you did want to only have one connection open... why not have another class for that (DBConn) and not instantiate a new connection in the constructor of your Database class. This way, each Database object can use the one connection by all referencing the DBConn object.
Just a thought...

An error occured while opening the connection: Object reference not set to

After I uninstalled Oracle Developer Tools for Visual Studio .NET 10.1.0.4 and installed Oracle Developer Tools for Visual Studio .NET with Oracle10g Release 2 ODAC 10.2.0.2.21 I got the error message below when I want to connect to my 10g database using Oracle Explorer.
Error:
An error occured while opening the connection: Object reference not set to an instance of an object
I use OracleConnection to open also cannot be done. But I use Oracle SQL Developer I can connect to orcl that I cannot connect using ODAC 10.2.0.2.21 in my laptop.
Please help me.
Ming Man

Sorry my mistake, I double checked, the one I uninstalled is ODAC 10.2.0.2.20 and not ODAC 10.1.0.4.
But I have that error.
Ming Man

Having the connection object for the specific schema

hi
My application interacting with the database of having many no of schema's. I need to create a connection object which is pointing to the specific schema in my database. This is help me to avoid writing schema name in the query every time.
Thanks
Siva

How to specify the schema name in properties file?
Say for example, i created properties file like that,
Properties props = new Properties();
props.setProperty("user", "username");
props.setProperty("password", "password');
In which property i can set for schema?

Link from IS-U connection object to email from marketing campain

Hi all,
I've a problem with emails from marketing campains in WebUI.
If you send an email from such a campain, it is linked at the contact historie of the receiving BP.
But we need an additional link from the IS-U connection objects of this BP to this email.
I implemented the badi CRM_MKT_MODIFY_ORDER to add the link in the docflow segment.
but now there a two mistakes. from the contact history of the BP the link still starts BT126H_MAIL, but only the part "references" is filled with BP, contact, res.employee and header data of the marketing campain. The email block is empty although the mail was sent correctly. Why am I losing the reference to the the email/smartform?
the second mistake is even more curious to me. in the contact history of the connection object is a link to the email created. But the link leads to component BT126H_APPT although its category is email.
Any idea, what's my mistake?
regards
Martin
Edited by: Martin Knittel on Aug 3, 2009 5:11 PM:
I solved problem no 1. Forgot a partner dataset in the badi.
But need still your help with problem no 2. Why is there a link to BT126H_APPT instead of BT126H_MAIL?

Was a mistake in standard coding. Solved by sap note

How to create connection objects in the NTDS settings container of a DC with LDIFDE

The following link shows some examples of how to automate creating subnets without having to use the sites and services console: http://codeidol.com/active-directory/active-directory/Site-Topology/Creating-a-Subnet/
My question is how can use LDIFDE to create connection objects? We don't use the defaultipsitelink and are creating the connections manaully. How can I use LDIFDE to create connection objects like this? I have not been able to find any examples on the internet.
Thanks for any replies.

KCC does the job of creating connection object automatically reading site/subnet/sitelink info, so why you need to create manually.
http://blogs.technet.com/b/markmoro/archive/2011/08/05/you-are-not-smarter-than-the-kcc.aspx
Regards
Awinish Vishwakarma
MY BLOG:
http://awinish.wordpress.com/
This posting is provided AS-IS with no warranties/guarantees and confers no rights.

Trying to close Statement from its Connection object

Hi, I am having difficulty finding information regarding how to find and kill a Statement for a given Connection. Unfortunately I do not have direct access to the Statement as the Connection object has been handed off and used externally.
What I am doing is playing around with a connection pool and the effort to replace it with another at this point is not feasible, so basically what I am attempting to do is forcefully release a Connection after a specified timeout period but am finding that the Statement that it is running still persists. Waht I need to know is how I would be able to track down the Statement and .close() it as there does not seem to be any obvious way using the Connection object alone. Any ideas?
Any help or suggestion about how to address this issue would be appreciated.

Wrap the connection before handing it off to external code. Your wrapper will be responsible for tracking statement instances.

Connection object as a key in a hashtable

Hi,
I am debugging some code where a Connection object is used as a key in a hashtable. Is this ok? Will the equals() and hashCode method be defined properly for a Connection object?
Appreciate your help.
Thanks!

I am debugging some code where a Connection object is
used as a key in a hashtable. Is this ok? Will the
equals() and hashCode method be defined properly for a
Connection object?First, answer the following question for yourself: how do you defined equality of Connections?
If a class merely inherits the equals() implementation from Object, then equality is the same as referential identity. If that is Ok for you [which is the case in surprisingly many cases], there is no harm is using Connections as hashtable keys.
Vlad.

Connection Object

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