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

Posts: 3
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I have, 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 my application
hangs up after 3 or 4 transactions......

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);
} catch (SQLException ex) {
} catch (NumberFormatException nfe) {
} finally {
try {
if (pspprogramenrollinfo != null) {
} catch (SQLException e) {
throw new RuntimeException("error.unexpected");


public void addProgramEnroll(ServletContext sc, Familyclient familyclient)
throws DatastoreException {
Connection conn = getConnection(sc);
FamilyclientDao dao = new FamilyclientDao(conn);
}catch (Exception ex){
throw DatastoreException.datastoreError(ex);
}finally {
if (conn != null) {
try {
} catch (SQLException sqle) {
log.error("Exception closing connection", sqle);
It is sorta covered in the JavaRanch Style Guide.
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