Mahmoud Elsonbati

JPA troubleshooting

this morning i got an error while inseritng an entity in the db
Unknown entity bean class: class model.Doctor, please verify that this class has been marked with the @Entity annotation.

the class is already having @Entity annotation , everything is set correctly
only small thing i noticed ..the id is defined as int
because during the process this bean is being populated from another bean and assigning int value to the id.

Solution ..by changing both beans from int to long this error disappeard :)

another error happend with glass fish server

java.lang.IllegalArgumentException: Object: is not a known entity type.

this when deploying an app and glass fish did not wake up yet to realize that the version of the class is changed

solution ..simply restart glassfish :D

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itext 2.7.1 writing Arabic and English content in a PDF file

public void createPdf(String filename) throws IOException, DocumentException { Document document = new Document(); PdfWriter.getInstance(document, new FileOutputStream(filename)); document.open(); document.add(Chunk.NEWLINE); FontFactory.register("c:/windows/fonts/tradbdo.ttf", "my_arabic"); Font myArabicFont = FontFactory.getFont("my_arabic" ,BaseFont.IDENTITY_H, BaseFont.EMBEDDED); PdfPTable table = new PdfPTable(1); table.getDefaultCell().setNoWrap(false); // table.setRunDirection(PdfWriter.RUN_DIRECTION_RTL); PdfPCell text = new PdfPCell(new Phrase("محمود السنباطيthis is أبتثجحخدرزسشصضطظعغفقكلمنهوى", myArabicFont)); text.setRunDirection(PdfWriter.RUN_DIRECTION_RTL); text.setNoWrap(false); table.addCell(text); //Add the table to the document document.add(table);

Installing liferay 6.2 on wildfly 10 app server and oracle 11g database & windows machine

*************************************DATABASE CREATION*********************************************************************************************** DOWNLOAD LIFERAY PORTAL SCRIPTS FROM https://www.liferay.com/downloads/liferay-portal/available-releases Rename the file as liferay.sql put it let say in under c drive , so it will be located like this c:\liferay.sql from cmd dir c:\ SQLPLUS / AS SYSDBA @liferay.sql lportal lportal it will create the db ..after finishing go to sqlplus again to ggrant the below to lportal user SQLPLUS / AS SYSDBA grant create session to lportal; grant connect to lportal; grant resource to lportal; *******************************CONFIGURE WILDFLY TO CONNECT TO ORACLE DB ***************************************************************************************************** configure wildfly to connect to oracle db Download the driver: ojdbc[VERSION].jar Create subfolders [WILDFLY_HOME]/modules/system/layers/base/com/oracle/main/ C

Fast Download with progress indication facility using Java NIO

package test; import java.io.FileOutputStream; import java.io.IOException; import java.net.HttpURLConnection; import java.net.URL; import java.nio.ByteBuffer; import java.nio.channels.Channels; import java.nio.channels.ReadableByteChannel; import java.util.Date; public class DownloadProgressExample { public static void main( String[] args ) { new Downloader( "c:/header12.jpg", "http://www.daralshifa.com/images/mainheader/header12.jpg" ); } private interface RBCWrapperDelegate { // The RBCWrapperDelegate receives rbcProgressCallback() messages // from the read loop. It is passed the progress as a percentage // if known, or -1.0 to indicate indeterminate progress. // // This callback hangs the read loop so a smart implementation will // spend the least amount of time possible here before returning. // // One possible implementation is to push the progress message // atomic