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POhow do I catch errors globally, log them and show user an error page in J2EE app
 

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    <p>I have searched this topic on google a bit and seen some best practices. But I need some specific advice. I am working on a J2EE app that has servlets/Struts2/Call to DAO's from JSP's. So the app is all kinds of messed up. Most of the data is fetched via stored procedures, which are being called by iBatis ORM/Spring. Sometimes when an error happens on the SP side it will display an ugly message to the user such as below:</p> <pre><code>javax.servlet.ServletException: org.springframework.jdbc.BadSqlGrammarException: SqlMapClient operation; bad SQL grammar []; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException: --- The error occurred in debtowed.xml. --- The error occurred while applying a parameter map. --- Check the debtowed.getFormerTenantData. --- Check the statement (update procedure failed). --- Cause: java.sql.SQLException: ORA-06550: line 1, column 11: PLS-00905: object package.GET_FORMER_ADDRESS is invalid ORA-06550: line 1, column 7: PL/SQL: Statement ignored Caused by: java.sql.SQLException: ORA-06550: line 1, column 11: PLS-00905: object package.GET_FORMER_ADDRESS is invalid ORA-06550: line 1, column 7: PL/SQL: Statement ignored </code></pre> <p>At this point the above information is displayed in the browser and logged to server.log.<br> However, I want to do following:</p> <ul> <li>Present user with custom error page</li> <li>log the errors in myapp.log instead of server.log (we do this in some other places as we use log4j)</li> </ul> <p>Plese tell me what is the best way of doing this? Should I be adding something in web.xml? like a listener? will that be the only change or will I have to change existing code?</p> <p>The code does not do any error checking. it just calls the SP like below</p> <pre><code>getSqlMapClientTemplate().queryForList("sp.getfmrAddy", paramMap); </code></pre>
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