aspose file tools*
The moose likes Struts and the fly likes where to close DBconnection in struts..urgent..please help Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Java 8 in Action this week in the Java 8 forum!
JavaRanch » Java Forums » Frameworks » Struts
Bookmark "where to close DBconnection in struts..urgent..please help" Watch "where to close DBconnection in struts..urgent..please help" New topic
Author

where to close DBconnection in struts..urgent..please help

Sri chirat
Greenhorn

Joined: Aug 19, 2004
Posts: 3
I have DAO.java, DAOManager.java for database transactions in my application.
I am using STRuts1.1, eclipse,j2sdk1.4.2, MySql, Tomcat 5.0
where do I close the database connection ..
Is it in DAO class...inside the methods for the transactions.
1.if I do this...I am getting exception saying connection is closed in daomanager.
2.if I do this in DAOmanager class....not in DAO.java..then my application
hangs up after 3 or 4 transactions......

//DAO.java
public void addProgramEnroll(Familyclient familyclient) throws DatastoreException{
PreparedStatement pspprogramenrollinfo = null;
try {
if (conn.isClosed()) {
throw new IllegalStateException("error.unexpected");
}
pspprogramenrollinfo = conn.prepareStatement(SQL_INSERT_PROGRAM);
......
pspprogramenrollinfo.execute();
}
} catch (SQLException ex) {
ex.printStackTrace();
} catch (NumberFormatException nfe) {
nfe.printStackTrace();
} finally {
try {
if (pspprogramenrollinfo != null) {
pspprogramenrollinfo.close();
//conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
throw new RuntimeException("error.unexpected");
}
}
}


//DAOmanager.java

public void addProgramEnroll(ServletContext sc, Familyclient familyclient)
throws DatastoreException {
Connection conn = getConnection(sc);
FamilyclientDao dao = new FamilyclientDao(conn);
try{
dao.addProgramEnroll(familyclient);
conn.commit();
}catch (Exception ex){
throw DatastoreException.datastoreError(ex);
}finally {
if (conn != null) {
try {
conn.close();
} catch (SQLException sqle) {
log.error("Exception closing connection", sqle);
}
}
}
}
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: where to close DBconnection in struts..urgent..please help
 
Similar Threads
Exception handling in finally block
Struts Web Application keeps hanging after 4 transacations with database
finally block is not executing
Dealing with multi-threading in servlets
java.sql.SQLException[ODBC Driver Manager]Data source name not found and no default driver specified