The performance of management system with Java and MySQL

Hi all,
I want to develop one management application with Java and MySQL. However I am not sure which is a good way to design the system. The system has to deal with customers' data in the database.
Should I create objects for every customers when application starts so that I do not need to access to the database often? Or
Should I access to the database everytime the user want to deal with customer's data?
Welcome for any suggestion.
Thank you
Pat

Hi
i i think u should go through MVC model or use connection pooling

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How to handle blob data with java and mysql and hibernate

Dear all,
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now my code is :--
==================================================
*.hbm.xml :--
<property name="image" column="IMAGE" type="com.shrisure.server.usertype.BinaryBlobType" insert="true" update="true" lazy="false"/>
===================================================
*.java :--
package com.shrisure.server.usertype;
import java.io.OutputStream;
import java.io.Serializable;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import javax.naming.InitialContext;
import javax.sql.DataSource;
import oracle.sql.BLOB;
import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
import org.jboss.resource.adapter.jdbc.WrappedConnection;
import com.google.gwt.user.client.rpc.IsSerializable;
public class BinaryBlobType implements UserType, java.io.Serializable, IsSerializable {
private static final long serialVersionUID = 1111222233331231L;
public int[] sqlTypes() {
return new int[] { Types.BLOB };
public Class returnedClass() {
return byte[].class;
public boolean equals(Object x, Object y) {
return (x == y) || (x != null && y != null && java.util.Arrays.equals((byte[]) x, (byte[]) y));
public void nullSafeSet(PreparedStatement st, Object value, int index) throws HibernateException, SQLException {
BLOB tempBlob = null;
WrappedConnection wc = null;
try {
if (value != null) {
Connection oracleConnection = st.getConnection();
if (oracleConnection instanceof oracle.jdbc.driver.OracleConnection) {
tempBlob = BLOB.createTemporary(oracleConnection, true, BLOB.DURATION_SESSION);
if (oracleConnection instanceof org.jboss.resource.adapter.jdbc.WrappedConnection) {
InitialContext ctx = new InitialContext();
DataSource dataSource = (DataSource) ctx.lookup("java:/DefaultDS");
Connection dsConn = dataSource.getConnection();
wc = (WrappedConnection) dsConn;
// with getUnderlying connection method , cast it to Oracle
// Connection
oracleConnection = wc.getUnderlyingConnection();
tempBlob = BLOB.createTemporary(oracleConnection, true, BLOB.DURATION_SESSION);
tempBlob.open(BLOB.MODE_READWRITE);
OutputStream tempBlobWriter = tempBlob.getBinaryOutputStream();// setBinaryStream(1);
tempBlobWriter.write((byte[]) value);
tempBlobWriter.flush();
tempBlobWriter.close();
tempBlob.close();
st.setBlob(index, tempBlob);
} else {
st.setBlob(index, BLOB.empty_lob());
} catch (Exception exp) {
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st.setBlob(index, BLOB.empty_lob());
// throw new RuntimeException();
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public Object deepCopy(Object value) {
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return null;
byte[] bytes = (byte[]) value;
byte[] result = new byte[bytes.length];
System.arraycopy(bytes, 0, result, 0, bytes.length);
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public boolean isMutable() {
return true;
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public Serializable disassemble(Object arg0) throws HibernateException {
return disassemble(arg0);
public int hashCode(Object arg0) throws HibernateException {
return hashCode();
public Object replace(Object arg0, Object arg1, Object arg2) throws HibernateException {
return replace(arg0, arg1, arg2);
=================================================================
can anyone give me the source code for this BinaryBlobType.java according to mysql blob handling ..

Moderator action: crosspost deleted.

[JAVA] problems with java and mysql

Hi, i have already installed php + mysql and work's them fine, but i want to install java + mysql. I have downloaded eclipse and installed its, that's ok. I have download tomcat and, that's ok. I have download module jconnector and have copied the file .jar in the java home and set classpath. Run and compiled this source that's ok. At runtime the program ask: Impossible connection at the database, why ? It's the source of program:
[JAVA]
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public class connessione {
private String nomeDB; // Nome del Database a cui connettersi
private String nomeUtente; // Nome utente utilizzato per la connessione al Database
private String pwdUtente; // Password usata per la connessione al Database
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this.nomeDB = nomeDB;
this.nomeUtente = nomeUtente;
this.pwdUtente = pwdUtente;
connesso = false;
errore = "";
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public boolean connetti() {
connesso = false;
try {
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Class.forName("com.mysql.jdbc.Driver");
// Controllo che il nome del Database non sia nulla
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db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB);
} else {
// La connessione richiede nome utente, controllo se necessita anche della password
if (pwdUtente.equals("")) {
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db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB + "?user=" + nomeUtente);
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db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB + "?user=" + nomeUtente + "&password=" + pwdUtente);
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connesso = true;
} else {
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System.out.println("Scrivere il nome del database da utilizzare all'interno del file \"config.xml\"");
System.exit(0);
} catch (Exception e) { errore = e.getMessage(); }
return connesso;
public static void main(String [] args) {
connessione a=new connessione("asta","root","");
if(a.connetti())
System.out.println("Connessione al database riuscita");
else
System.out.println("Connessione al database non riuscita");
[JAVA]

With this line I always pass the username and password also:
db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB);
db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB, useName, Password);
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Problems with java and mysql error: 1064

Hello,
I have been struggling with the following java code for a day. I ALWAYS get the following error code : 1064 and I just can't figure out why. I am trying to insert data into a mysql table.
Can anyone please help?
Thanks in advance,
Julien.
package com.newedgegroup.pnr.misc;
import java.sql.BatchUpdateException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.text.ParseException;
import java.text.SimpleDateFormat;
* @author Julien Martin
public class RunDataCopy {
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//        ResultSet rs_source = stat_source.executeQuery("select * from QS36F.GMIST4F1 po");
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                "po.PFIRM, " +
                "po.POFFIC, " +
                "po.PACCT, " +
                "po.PTDATE, " +
                "po.PRR, " +
                "po.PEXCH, " +
                "po.PSUBEX, " +
                "po.PFC, " +
                "po.PSYMBL, " +
                "po.PCLASS, " +
                "po.PSUBCL, " +
                "po.PSUBTY, " +
                "po.PSDSC1, " +
                "po.PCTYM, " +
                "po.PSTRIK, " +
                "po.PCLOSE, " +
                "po.PUNDCP, " +
                "po.PCURSY, " +
                "po.PEXPDT, " +
                "po.PLTDAT, " +
                "po.PMULTF, " +
                "po.PPTYPE, " +
                "po.PBS " +
                "FROM QS36F.GMIST4F1 as po " +
                "WHERE " +
                "0              = 0 " +
                "AND po.PFIRM   = 'I' " +
                "AND po.POFFIC = '349' " +
                "AND po.PRECID in ('T','B','Q') " +
                "AND po.PSUBTY != ' ' " +
                "AND po.PCMNT1 != ' E' " +
                "AND po.PCMNT1 != ' A' " +
                "GROUP BY " +
                "po.PFIRM, " +
                "po.POFFIC, " +
                "po.PACCT, " +
                "po.PTDATE," +
                "po.PRR, " +
                "po.PEXCH, " +
                "po.PSUBEX," +
                "po.PFC, " +
                "po.PSYMBL, " +
                "po.PCLASS, " +
                "po.PSUBCL, " +
                "po.PSUBTY, " +
                "po.PSDSC1, " +
                "po.PCTYM, " +
                "po.PSTRIK, " +
                "po.PCLOSE, " +
                "po.PUNDCP, " +
                "po.PCURSY, " +
                "po.PEXPDT, " +
                "po.PLTDAT, " +
                "po.PMULTF, " +
                "po.PPTYPE, " +
                "po.PBS ";
        // System.out.println(query);
        ResultSet rss = stat_source.executeQuery(query);
        StringBuffer sb = new StringBuffer("");
        SimpleDateFormat df_s = new SimpleDateFormat("yyyyMMdd");
        SimpleDateFormat df_t = new SimpleDateFormat("yyyy-MM-dd");
        con_target.setAutoCommit(false);
        Statement stat_target = con_target.createStatement();
        int i = 0;
        try {
            while (rss.next()) {
                i++;
                sb.append("INSERT INTO `pnr`.`pnr_transaction` (").append("\n");
                sb.append("`FIRM_ID`,").append("\n");
                sb.append("`OFFICE_NUMBER`,").append("\n");
                sb.append("`ACCOUNT_NUMBER`,").append("\n");
                sb.append("`SALESMAN`,").append("\n");
                sb.append("`EXCHANGE_CODE`,").append("\n");
                sb.append("`SUBEXCHANGE`,").append("\n");
                sb.append("`FUTURES_CODE`,").append("\n");
                sb.append("`SYMBOL`,").append("\n");
                sb.append("`ACCOUNT_CLASS_CODE`,").append("\n");
                sb.append("`SUB_CLASS_CODE`,").append("\n");
                sb.append("`SECURITY_SUB_TYPE`,").append("\n");
                sb.append("`SECURITY_DESCRIPTION_LINE`,").append("\n");
                sb.append("`CONTRACT_YR_MON`,").append("\n");
                sb.append("`STRIKE_PRICE`,").append("\n");
                sb.append("`CLOSING_MARKET_SETTLEMENT_PRICE`,").append("\n");
                sb.append("`UNDERLYING_CLOSE_PRICE`,").append("\n");
                sb.append("`PRODUCT_CURRENCY_SYMBOL`,").append("\n");
                sb.append("`EXPIRATION_DATE`,").append("\n");
                sb.append("`LAST_TRADING_DATE`,").append("\n");
                sb.append("`MULTIPLICATION_FACTOR`,").append("\n");
                sb.append("`PRODUCT_TYPE_CODE`,").append("\n");
                sb.append("`CATEGORY_ID`,").append("\n");
                sb.append("`MARKET_TYPE_ID`,").append("\n");
                sb.append("`TAX_STATUS_ID`,").append("\n");
                sb.append("`AMOUNT`").append("\n");
                sb.append(") VALUES (").append("\n");
                sb.append("'").append(rss.getString("PFIRM")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("POFFIC")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PACCT")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PRR")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PEXCH")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSUBEX")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PFC")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSYMBL")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PCLASS")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSUBCL")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSUBTY")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSDSC1")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PCTYM")).append("'").append(",").append("\n");
                sb.append(rss.getString("PSTRIK")).append(",").append("\n");
                sb.append(rss.getString("PCLOSE")).append(",").append("\n");
                sb.append(rss.getString("PUNDCP")).append(",").append("\n");
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                sb.append(rss.getString("PMULTF")).append(",").append("\n");
                sb.append("'").append(rss.getString("PPTYPE")).append("'").append(",").append("\n");
                //sb.append(rss.getString("PBS")).append(",");
                sb.append("1").append(",").append("\n");
                sb.append("1").append(",").append("\n");
                sb.append("1").append(",").append("\n");
                sb.append(rss.getString("OPTION_PREMIUM")).append("").append("\n");
                // sb.append(df_t.format(df_s.parse(rss.getString("PTDATE")))).append(",");
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                System.out.println(sb.toString());
                //     stat_target.executeUpdate(sb.toString());
                stat_target.addBatch(sb.toString());
//        stat_target.executeUpdate(sb.toString());
                if (i == 2) {
                    break;
            stat_target.executeBatch();
            con_target.commit();
        } catch (BatchUpdateException be) {
            System.out.println("be: "+be.getErrorCode());
            System.out.println("be: "+be.getMessage());
            be.printStackTrace();
            System.out.println("be: "+i);
        } catch (SQLException se) {
            System.out.println("se: "+se.getErrorCode());
            System.out.println("se: "+i);
}

What is the error message?
I advice you to use prepared statement for batch inserting.

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iMac 1920 x 1200
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Hitachi HDS721010KLA330 disk0 : (1 TB)
S.M.A.R.T. Status: Verified
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Mitsumi Electric Apple Optical USB Mouse
Apple Inc. Built-in iSight
Apple, Inc. Keyboard Hub
Apple, Inc Apple Keyboard
Apple Inc. Bluetooth USB Host Controller
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FlashPlayer-10.6: Version: 14.0.0.145 - SDK 10.6 Support
JavaAppletPlugin: Version: Java 7 Update 67 Check version
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156 MB SophosScanD
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*https://support.mozilla.org/kb/how-to-use-java-if-its-been-blocked
See also:
*http://kb.mozillazine.org/Java#Windows_installation_issues
You can find the latest Java version on the Oracle website.
See Java Platform > Java SE 7U11 and Java 6U38 (Download JRE)
*http://www.oracle.com/technetwork/java/javase/downloads/index.html

How to restrict the quantity & rate of MIRO with MIGO and PO

Hi friends,
Can any body tell me how to restrict the quantity & rate of MIRO with MIGO and PO.
e.g. if we have done MIGO for quantity 10 and the rate maintained in the PO is Rs.100.Then at the time of MIRO system should not allow to change the quantity and rate.
How we can do this?
Regards
Purnesh Sharma

Hi,
You are misunderstanding the use of MIRO.
If you change the details in MIRO you are NOT changing anything. You are just entering the price and quantity from the Invoice.
If this price and or qty is different from the GR aqty and PO price then the system will block the invoice for payment (and it can issue messages toinform the buyer if configured correctly).
The whole design of MIRO is based on the principle that you enter EXACTLY what the vendor has put on the invoice. By preventing the users from changing anything you will get NO mismatched invoices, but you will not be paying the vendor the amount specified on their invoice. This will surely cause problems.
If you do want to ensure that ONLY the GR qty and the PO price are used and cannot be changed then why not consider using ERS (Eveluated Receipt Settlement. this is basically self billing.
Effectively you will be paying the vendor based on what you have received in MIGO multiplied by the price from the PO. (which is what you would be doing if you stop any changes in MIRO)
Steve B

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