RE: [DBCP]Rollback doesn't work

[Holly, Michael]

Monica

I might be wrong but I think the version of mySQL you are using does not
support transactionality/rollback.  mySQL is a speedy product but the
designers take the view that the
Application should be responsible for things like transactionality.  

Hope this Helps

Michael

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] 
Sent: Friday, December 19, 2003 10:31 AM
To: [EMAIL PROTECTED]
Subject: [DBCP]Rollback doesn't work


Hi!

I have a simple webapp that allows users to register. The user is
inserted in the DB and a confirmation mail is sent to the user. If the
mail fails I'd like the DB to rollback the transaction, but it doesn't
do it. The new user entry is kept in the DB. I'm using Tomcat 4.1 and
mySQL 2.3.2.

I include the code, log and server.xml.

Thanks for your help.

Monica


***CODE:

        Connection dbCon = null;
        boolean isSuccess = false;
        try {
            //inser user in db
            dbCon = new DBUtil().getDBConnection();
            dbCon.setAutoCommit(false);
            userDBPopulator.insertEntry(user, dbCon);

            //send mail to user
            [snip]
            isSuccess = true;
        }
        //rollback  if fail
        catch (MailException e) {
            log.error("MailException " + e.getMessage(), e);
            log.debug("trying to rollback and close");
            try {
                dbCon.rollback();
            }
            catch (SQLException e1) {
                log.error("SQLException rollbacking " + e1.getMessage(),
e1);
            }
            try {
                dbCon.close();
            }
            catch (SQLException e1) {
                log.error("SQLException closing connection to DB " +
e1.getMessage(), e1);
            }
        }
        catch (SQLException e) {
            log.error("SQLException " + e.getMessage(), e);
            try {
                dbCon.rollback();
            }
            catch (SQLException e1) {
                log.error("SQLException rollbacking " + e1.getMessage(),
e1);
            }
            try {
                dbCon.close();
            }
            catch (SQLException e1) {
                log.error("SQLException closing connection to DB " +
e1.getMessage(), e1);
            }
            throw new ServletException(e);
        }

        //commit user entry
        if( isSuccess){
            log.debug("commiting");
            try {
                dbCon.commit();
            }
            catch (SQLException e1) {
                log.error("SQLException commiting " + e1.getMessage(),
e1);
                throw new ServletException("SQLException commiting " +
e1.getMessage(), e1);
            }
            try {
                dbCon.close();
            }
            catch (SQLException e1) {
                log.error("SQLException closing connection to DB " +
e1.getMessage(), e1);
            }
        }

****LOG:

2003-12-19 15:44:12,546 DEBUG [Thread-3] (RegisterServlet.java:200) -
handle register request 2003-12-19 15:44:12,562  INFO [Thread-3]
(UserDBReader.java:202) - No user found with name monica 2003-12-19
15:44:12,578 DEBUG [Thread-3] (MailHelper.java:88) - Sending mail to m
2003-12-19 15:44:12,625 ERROR [Thread-3] (MailHelper.java:121) -
Messaging
Exception: Sending failed
2003-12-19 15:44:12,625 ERROR [Thread-3] (MailHelper.java:124) - Next
Messaging Exception: Invalid Addresses; 2003-12-19 15:44:12,640 DEBUG
[Thread-3] (RegisterServlet.java:282) - trying to rollback and close


***SERVER.XML

            <Resource name="jdbc/allukmasterDB"
                auth="Container"
                type="javax.sql.DataSource"/>

                <ResourceParams name="jdbc/allukmasterDB">
                    <parameter>
                        <name>factory</name>
        
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
                    </parameter>
                    <parameter>
                        <name>maxActive</name>
                        <value>100</value>
                    </parameter>
                    <parameter>
                        <name>maxIdle</name>
                        <value>30</value>
                    </parameter>
                    <parameter>
                        <name>maxWait</name>
                        <value>10000</value>
                    </parameter>
                    <parameter>
                        <name>username</name>
                        <value>*******</value>
                    </parameter>
                    <parameter>
                        <name>password</name>
                        <value>********</value>
                    </parameter>
                    <parameter>
                        <name>driverClassName</name>
                        <value>com.mysql.jdbc.Driver</value>
                    </parameter>
                    <parameter>
                        <name>url</name>
        
<value>jdbc:mysql://myMachine.com/myDB?autoReconnect=true</value>
                    </parameter>
            <parameter>
                <name>removeAbandoned</name>
                <value>true</value>
            </parameter>
            <parameter>
                <name>logAbandoned</name>
                <value>true</value>
            </parameter>
                </ResourceParams>

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