Interrupt method + JDBC connections

Question

Hi all
<br>
Obviously I have a problem with the above :)
Briefly:
<br><br>
- I have a thread that does some things (long operations) and writes results into database
<br>
- The main thread has an option to cancel (using interrupt method) the thread on user's request
<br><br>
but when I invoke that interrupt method it obviously stops the thread, stops the statement running, takes me to the catch block shown below, but when I try to create a new JDBC connection in that block, I get the exception:
<br>
Io exception: The Network Adapter could not establish the connection <br>
     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:180)<br>
     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:222)<br>
     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:335)<br>
     at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:361)<br>
     at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:442)<br>
     at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:321)<br>
     at java.sql.DriverManager.getConnection(DriverManager.java:525)<br>
     at java.sql.DriverManager.getConnection(DriverManager.java:171)<br>
<br>
<b>In other words I am not able to rollback what has been done so far!</b>
<br>
I just have to also say that I am using connection pooling and the "long operation" consists of many smaller ones. They all use database. It is a one tree-like process and I can't use just one connection for the whole thing to make it more simple.
<br>
<code>
run()<br>
{<br>
try<br>
{<br>
//long operation/transaction here<br>
...<br>
}<br>
catch (Exception e)<br>
{<br>
//do some rollback operations corresponding to <br>
//the above transaction's progress <br>
}<br>
}<br>
</code>
<br>
So, can anyone tell me please, what am I doing wrong or is there any workaround for that?
<br>
Regards<br>
Thomas
<br>
Message was edited by: <br>
hrabiatc
Message was edited by:
hrabiatc

Answer 1

Good descriptions at:
http://www.java.sun.com/products/jdbc/driverdesc.html