Break into a session!

Hi Guru's,
I have a problem where I can't find a solution for. How can I break into a session?
The issue is as follows:
In a session I have a open database link connection and I want to close it using dbms_session.close_database_link or alter session close database link. But it's not possible to execute those commands in the application (we can't change the code).
First I thought I create a trigger on a table and on delete/update/insert I execute the statement, but it turns out we can't always execute dml on the specific table from the application.
So are there other options?
I also thought of dbms_alert and dbms_pipe but they use different sessions.
regards, Hans

user497975 wrote:
We have a gateway to DB2. A certain application is using this gateway but doesn't close the database link after using it as it should be doing. On DB2 there is an idle timeout parameter set to 10 minutes. This means after 10 minutes an error is generated when the application is using the gateway again. This is unwanted behaviour.
There are 4 options:
1 the error is catched by an exception
2 the database link is closed in the session
3 the session is closed
4 every (let's say) 5 minutes a calll will be done to the gateway
But those 4 options can't be executed from the application as we cannot alter the code. This is a third party tool and the supplier doesn't change the code for this. So we have to find another solution.Actually, there are at least two other options, that you DO have control over
1 - change the idle timeout parameter at db2
2 - tell the user they can't just walk away from their app and go to lunch, but need to shut it down when they are through working.
And there is a third, which you have partial control over -- lean on the product vendor to fix their buggy application. You as a DBA may not be able to do this, but it sounds like something that should be done by those who can. If your company is paying more than a trivial amount of money, they DO have leverage if they just have the ..... to use it.

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