Using JDBC in multithreaded Java application?

Hello everyone
Is it supported to use JDBC in multiple concurrent threads of a single Java application?
I intend to use Java 7 (or even Java 8?) from standard Java multi-threaded library to access the following: Oracle 11g/12c and Microsoft SQL Server 2012-2014 and also PostgreSQL 9.4+.
The Java dababase client application will run on Linux and on Windows (64-bit).
If its supported to use JDBC in multi-threaded way - will it scale up well or am I better off using mutiple single-threaded Java applications instead?
Are there any rules to follow when using JDBC from multiple-concurrent threads (such as: do not share any JDBC objects among threads, etc).
Thank you
Yuri Budilov

Is it supported to use JDBC in multiple concurrent threads of a single Java application?
Of course.
I intend to use Java 7 (or even Java 8?) from standard Java multi-threaded library to access the following: Oracle 11g/12c and Microsoft SQL Server 2012-2014 and also PostgreSQL 9.4+.
You should use a separate connection pool for each database.
See the JDBC Dev Guide and use the latest Oracle driver and the latest connection methods shown in that doc
http://docs.oracle.com/cd/E11882_01/java.112/e16548/toc.htm

Similar Messages

Can I use Streaming Video in Java Application?

Will i be able to use Streaming Video in Java Application, if yes can anyhow out there pls teach me how to do it... thanks...

read up on the Java Medai Framework http://java.sun.com/products/java-media/jmf/index.html

How to use " toFront() " method in java application and in which package or

How to use " toFront() " method in java application and in which package or class having this toFront() method.if anybody know pl. send example.

The API documentation has a link at the top of every page that says "Index". If you follow that and look for toFront(), you will find it exists in java.awt.Window and javax.swing.JInternalFrame.
To use it in a Java application, create an object x of either of those two classes and write "x.toFront();".

Why jdbc api ?why not use odbc api from java application?

hi guys....am pretty confused abt these jdbc drivers...am unable to understand why we r using jdbc api when odbc api has been in market prior to jdbc.....please clarify my doubt

chari wrote:
hi guys....am pretty confused abt these jdbc drivers...am unable to understand why we r using jdbc api when odbc api has been in market prior to jdbc.....please clarify my doubtbecause jdbc is the way that java does it.
use it or don't.
C++ was in the market before java - why was java developed at all? cobol was in the market before C++ - why was C++ developed at all?
%

Is database Engine necessary or should I use one in my Java application?

I am writing a program which similar to a telephone directory kind of application. I have a database and I am thinking to use JDBC with mySQL for the database.
My question is that later when this program is ready and I am going to burn it to CD, what will be happen with mySQL? Can I add mySQL (or a similar program)?
Is it not better to make a database by Java objects or arrays within Java? What is the smart way to this when it comes to a program which in the background you have database??? Thank you for sharing your expertise...

I am writing a program which similar to a telephone
directory kind of application. I have a database and
I am thinking to use JDBC with mySQL for the
database.
My question is that later when this program is ready
and I am going to burn it to CD, what will be happen
with mySQL? Can I add mySQL (or a similar program)?You can, but will users want that? Are you better off allowing users to work with any relational database they wish?
>
Is it not better to make a database by Java objects
or arrays within Java? Unless you plan on writing a relational database and SQL engine on your own, the best bet is to get a real relational database.
Hypersonic SQL is small and embeddable in Java. Cloudscape might be good, too. Derby is going to be part of Java 6, unfortunately. PostgreSQL is a terrific relational database that's free.
What is the smart way to this
when it comes to a program which in the background
you have database??? Thank you for sharing your
expertise...The smart thing is to get a real relational database and forget about doing it yourself. Databases are far more complex than a few arrays or objects.
%

DISPLAY SPATIAL DATA USING JDBC ON A JAVA FRAME

I am trying to set up some spatial data and need help in getting some sample
code for displaying the data on a Java Frame using JDBC.
The shapes I am setting up are simple polygons, lines, circles. I was going
through the samples in the demo directory under $ORACLE_HOME/md/demo/examples, but could not find any JDBC
I would really appreciate if you can point me towards some sample code and any other spatial resources.
Madhukar

Here you go. It uses JDBC to fetch geoms, convert them into Java JGeometry objects, which then create Java2D shapes (these are functions of the public sdoapi.jar library). It then uses some class in the sdovis.jar library (the rendering engine of MapViewer) to setup the necessary viewport transform. If you know how to setup the viewport transform, then you dont even need sdovis. sdovis.jar is found in an deployed MapViewer's WEB-INF/lib directory. Or you can extract it from the mapviewer.ear's web.war file.
import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import java.awt.image.*;
import java.sql.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.*;
import oracle.jdbc.OracleDriver;
import oracle.sdovis.*;
import oracle.sdovis.style.*;
import oracle.sdovis.util.*;
import oracle.spatial.geometry.JGeometry;
import oracle.sql.STRUCT;
* A very simple program that shows stuff from db in a JFrame
* <p>
public class tilsvgui2 extends JFrame
final static int mapWidth = 640;
final static int mapHeight = 480;
static JSDOGeometry geom = null;
public tilsvgui2()
    setSize(mapWidth+40, mapHeight+40);
                setVisible(true);
    this.addWindowListener(new java.awt.event.WindowAdapter() {
      public void windowClosing(WindowEvent e) { System.exit(0); }
        public void paint(Graphics g)
                super.paint(g);
    int w = this.getWidth(), h = this.getHeight();
    Insets inset = this.getInsets();
    double[] mbr = geom.getMBR();
    //from sdovis; it will setup the viewport transform
    XFViewPort xfp = new XFViewPort();
    xfp.setDeviceView(inset.left, inset.top, w-inset.left-inset.right-1, h-inset.top-inset.bottom-1);
    xfp.setDataView(mbr[0], mbr[1], mbr[2], mbr[3]);
    AffineTransform af = xfp.getAffineTransform();    //get the viewport transform
    Shape shp = geom.createShape(af);    //create a proper shape that fits the viewport
    Graphics2D g2 = (Graphics2D) g;
    g2.setColor(Color.red);
    g2.drawRect(inset.left, inset.top, w-inset.left-inset.right-1, h-inset.top-inset.bottom-1);
    //draw the shape itself
    g2.setColor(Color.blue);
    g2.draw(shp);
public static void getStuff() throws Exception
    System.out.println("Loading geometry...");
    Connection conn = getConnection("mapsrus.us.oracle.com", "1521", "orcl", "scott", "tiger");
    Statement stmt = conn.createStatement();
    ResultSet rset = stmt.executeQuery("select geom, totpop from counties where county='Merrimack' and state_abrv='NH'");
    while(rset.next())
      STRUCT st = (STRUCT) rset.getObject(1);
      geom = JSDOGeometry.loadFromDB(st);
      int population = rset.getInt(2);
      break; //displaying only the first geometry
    rset.close();
    stmt.close();
    conn.close();
private static Connection getConnection(String host,
                                          String port,
                                          String sid,
                                          String username,
                                          String password)
    throws SQLException
    String thinConn = "jdbc:oracle:thin:@"+host+":"+port+":"+sid;
    Driver d = new OracleDriver();
    Connection conn = DriverManager.getConnection(thinConn,username,password);
    conn.setAutoCommit(false);
    return conn;
public static void main(String[] args)
    try{
      getStuff();
    }catch(Exception e)
      e.printStackTrace(System.err);
    new tilsvgui2();
}

HOW TO use OCX controls with Java application

hi
Is it possible to use microsoft Ocx controls in java applications.

Anything is possible. You might want to ask if it's a good idea, but look at some of the people who have asked before. It looks like there are products out there to help.
http://search.java.sun.com/search/java/index.jsp?qp=&nh=10&qt=%2Btitle%3Aocx&col=javaforums&x=19&y=13

How to use a proxy with java applications?

I have a nokia 6300 type s40v3
hello,
I would like to know if it is possible to use a proxy of any and how ? kind with java applications.
thank you

Well, it works well when, into my applet, i do somethig like this:
URL url = new URL(host);
URLConnection connexion = url.openConnection();My applet uses proxy setting from IE6 but only if i use Java 1.4.2_08.
With IE6 and Java 1.5.04, it doesn't work (my applet doesn't use proxy settings)
With Firefox and Java 1.5.04, it's ok
Have you already seen a problem like this with Java 1.5.04 ?

Using Unix commands from Java Application

Hi,
I need to write an Java application such that could run Unix commands in a Unix box.
For example, my Java app needs to log in the Unix box, change directory (cd), create new folder (mkdir), list the current files in folder (ls), mount a new device (mount), etc.
Thank you very much.
Hung

you can use java.lang.Runtime.exec to invoke OS commands, but if you're going to be completing a sequence that complicated and need to manage error handleing well, it might be best to just invoke a native method or write a shell script that does all of that stuff and then invoke that script via Runtime.exec . The Runtime class has limitations when you start invoking processes that require user input (like 'su'). Search the forums for more extensive examples on how to use Runtime.

Using Flex components in Java application

Hello,
I was learning Flex previously, and I thought I remembered reading somewhere that I can use Flex UI components in a Java application. For instance, I could use Flex for the UI, and Java for the backend. I can't find though the documentation for this. I read this last summer. I don't mean using Flex as a UI in a browser and Java on the server, but a Java application that runs on the client with a Flex UI. I thought what I needed was the flex compiler api, but I looked at the flex compiler api documentation and it isn't what I want.
Does anyone know what this "part" of Flex is that I am talking about, but can't remember?
Thanks,
Vance

No, thanks, but that wasn't what I was thinking of.
What I remember looking at was some library that allowed wrapping Flex UI componnts in Java Swing components. Then the Swing components could be used in the Java app. One main objective of my wrapping Flex in Java is to use flash.media.Video class to play flash video.

Using xml file in java application

How can i get the attribute name & value into my java application from a xml flie?

read the file
parse the contents
store attribute name & value pairs.
%

How to use OLE Components in Java Application?

Hi,
I try to make program that is able to include OLE components( Excel sheet, MS Word document, and so on ), and that can control these components.
I want to know that Java Application or Applet can control and show OLE components like JavaBeans components. If that, How to ?

Try this to generate a Word file.....
import com.jacob.activeX.*;
import com.jacob.com.*;
public class ExportDOC {
public ExportDOC () {
//Application type
ActiveXComponent doc = new ActiveXComponent("Word.Application");
//Application visible
doc.setProperty("Visible", new Variant(true));
Object documents = doc.getProperty("Documents").toDispatch();
//Open a file already exits
//Object document = Dispatch.call(documents, "Open", "c:/nameFile.doc").toDispatch();
//Open a new file empty
Object document = Dispatch.call(documents, "Add", "").toDispatch();
Object selection = Dispatch.get(doc,"Selection").toDispatch();
//Text Format
Object font = Dispatch.get(selection, "Font").toDispatch();
Object alignment = Dispatch.get(selection, "ParagraphFormat").toDispatch();
Object image = Dispatch.get(selection, "InLineShapes").toDispatch();
//I put the selection at the end of the file for if I want to add text
//Dispatch.call(selection, "EndKey", "6");
//Text format (bold & italic)
Dispatch.put(font, "Bold", "1");
Dispatch.put(font, "Italic", "1");
//To jump line
Dispatch.call(selection, "TypeParagraph");
//Align center (0= left, 1=center, 2=right, 3=justify)
Dispatch.put(alignment, "Alignment", "1");
//Insert image
Dispatch.call(image, "AddPicture", "c:/graf.jpg");
Dispatch.call(selection, "TypeParagraph");
Dispatch.put(alignment, "Alignment", "3");
//Insert Text
Dispatch.call(selection, "TypeText", "Text ....... ");
//Original values
Dispatch.call(selection, "TypeParagraph");
Dispatch.put(alignment, "Alignment", "0");
Dispatch.put(font, "Bold", "0");
Dispatch.put(font, "Italic", "0");
//To jump page
//Dispatch.call(select, "InsertBreak");
//Save the document
//Dispatch.call(document, "SaveAs", "c:/test.doc");
//Quit the application
//dc.invoke("Quit", new Variant[] {});
public static void main(String[] args) {
ExportDOC e = new ExportDOC();
but you must download 'jacob.jar' in....
http://users.rcn.com/danadler/jacob/
is a FREEWARE!!!
regards!!

How to register jdbc driver in java application

Using Java Studio Enterprise:
1. Add mssqlserver.jar to Libraries.
2. jar contains package: com.microsoft.jdbc.sqlserver,
package contains SQLServerDriver.class
Trying to register this driver in program with:
Class.forName("com.microsoft.jdbc.SQLServerDriver");
raises exception ClassNotFoundException
Maybe I should put mssqlserver.jar to specific folder?
For web application using same driver works fine.

hi,
Class.forName("com.microsoft.jdbc.SQLServerDriver");
raises exception ClassNotFoundExceptionFirst you check weather these jar files is in your lib <folder>
msbase.jar,mssqlserver.jar,msutil.jar
if no, copy that files and try it,

Function used in web dynpro java application

Hi
I am creating some application in web dynpro java by using ABAP function module and table. I am trying to put data to table and update data in table and delete data in table in my application by using ABAP function by using RFC. And this is the ABAP function module.
FUNCTION ZUP_DESIG12.
*"*"Local Interface:
*" IMPORTING
*"     VALUE(DESG_CODE) TYPE ZUP_DESIG-DESG_CODE OPTIONAL
*"     VALUE(DESG_DESC) TYPE ZUP_DESIG-DESG_DESC OPTIONAL
*"     VALUE(DESG_ACT) TYPE ZUP_DESIG-DESG_ACT OPTIONAL
*"     VALUE(DESG_OPT) TYPE ZUP_DESIG-DESG_OPT OPTIONAL
*" TABLES
*"      WA STRUCTURE ZMSTR_DESIG
DATA CNT TYPE I.
SELECT MANDT DESG_CODE DESG_DESC DESG_ACT FROM ZMSTR_DESIG
INTO TABLE WA.
IF DESG_OPT = 'U'.
UPDATE ZMSTR_DESIG
    SET DESG_DESC = DESG_DESC
    DESG_ACT = DESG_ACT
    WHERE DESG_CODE = DESG_CODE.
MESSAGE 'Updated Successfully' TYPE 'I'.
ELSEIF DESG_OPT = 'C'.
SELECT COUNT( * ) FROM ZMSTR_DESIG INTO CNT
   WHERE DESG_CODE = DESG_CODE.
   IF CNT > 0.
   MESSAGE 'Duplicate Designation code' TYPE 'I'.
   ELSE.
WA-DESG_CODE = DESG_CODE.
WA-DESG_DESC = DESG_DESC.
WA-DESG_ACT = DESG_ACT.
MODIFY ZMSTR_DESIG FROM WA.
   MESSAGE 'Inserted successfully' TYPE 'I'.
ENDIF.
ELSEIF DESG_OPT = 'D'.
   DELETE FROM ZMSTR_DESIG WHERE DESG_CODE = DESG_CODE.
   MESSAGE 'Deleted successfully' TYPE 'I'.
ENDIF.
ENDFUNCTION.
I am not able to put data to table through my application but i am getting this error.
     java.lang.ArrayIndexOutOfBoundsException: -1
What might be the problem .
Regards,
H.V.Swathi

Can any one tell solution

Have a problem using flex ui with Java application

Hi, I have a built a Flex UI for a java project. The UI has
some forms which use a servlet for POST and data populated from
servlet. I have used HTTP service to make the calls. I have built
my application i.e UI in Flex Builder and when I run my application
from flex builder everything works fine i.e data populated
correctly..
But when I open the projects folder and run the html file
generated the Http Service does not happen. Can anybody tell me why
is this so?? . Moreover I want use this UI for my already existing
java project. So what all files (i,e. html, mxml, swf) will be
required to be copied to my java project for the UI to work ..
.Thanks in advance...

well, that's because Flex Builder is tell Flash player to
trust stuff in the bin folder:
http://viconflex.blogspot.com/2008/08/why-no-sandbox-violation-running-from.html
ATTA

Using JDBC in multithreaded Java application?

Similar Messages

Maybe you are looking for