Java EE SDK :: GlassFish MySQL Datapool Not Working
Mar 17, 2015
I have installed the lastest version of GlassFish and I wanna create new datapool using MySQL.
But when I create it and then I ping it, it shows me this error:
Ping Connection Pool failed for Testing. Connection could not be allocated because: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.net.SocketException MESSAGE: java.net.ConnectException: Connection refused: connect STACKTRACE: java.net.SocketException: java.net.ConnectException: Connection refused: connect at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:156)
I have an java connection pool using glassfish and mysql jdbc connector. All is fine, my datasource is working using JNDI, etc. But i need to know some info about of connection pool status (maxPoolSize, current active, etc..). I need it to monitoring the connection in the web app.
All work fine. But i need get de pool size and MysqlDataSource class don't have a method to get it. In tomcat, i use org.apache.tomcat.jdbc.pool.DataSource with getMaxActive() and getActive(). And it work fine. How i can obtain it on glassfish server?
I have my web JSF application on glassfish v2 using java-7-oracle JDK. So glassfish is running correctly on my server ubuntu 12, but when i get my firt page with login, i have this message error from log file :
Horodatage 2 mai 2013 03:13:01.528 Niveau du journal SEVERE Journal javax.enterprise.resource.webcontainer.jsf.application Paires Nom-Valeur
when I look at javaee-api it has javax.enterprise.context.ApplicationScoped and javax.inject.Named which are the particular imports being used in the bean. The facelets part is working, the template navigates correctly. It deploys to Glassfish and runs, except...there's no output from the @Named bean:
package dur.beans; import javax.enterprise.context.ApplicationScoped; import javax.inject.Named; @Named("nextClient") @ApplicationScoped public class NextClient implements NextClientLocal {
[code]...
Now it's working. I can't figure what I did for the life of me...that's the desired output, each time the page is accessed the counter increments.Now it works. Is this on the right track? Way off base? I have an entity class from a database which I'd like to link up to this, and output the class.I can inject the entity into NextClient? I'm trying to do the "R" for Read in a CRUD application with CDI and facelets (using templates).
I've found much reference material on EJB, but it seems a mishmash. I just want to use CDI. What am I doing right/wrong, or, besides the PDF from Oracle on Java EE 7, what are good CDI reference material's?
I have written a java application that retrieves data from a database and display it on a graph. What i want is that the two systems are synchronized in such a way that when we update a value in the database, it is immediately shown on the graph.i have tried to use a refresh button but decided this would increase the overhead.
In my project i am facing an problem, The My SQL Data base will accept the date format of yyyy/mm/dd only as "Date" data type but in my program i wants to use dd/mm/yyyy format. (i have this same format now) that's why I am unable to insert / retrieve it..
I am developing my first Java application and the database I use is MySQL. I have created two separate buttons; one to insert new data into my database and the other to update the database when changes are made.
Each button is working perfectly, but I now want to combine both functions into just the save button. Thus, whether I am entering new data or modifying existing data, the save button should use an IF ELSE condition to decide whether to use the INSERT or UPDATE command.
My problem is, how do I write this IF ELSE statement? What should be the condition? For example;
IF(what? ){ String sql ="Insert into Table1 (classID,className,counselorID,startDate,endDate) values (?,?,?,?,?)"; }ELSE{ String sql2 = "update Table1 set classID = '"+value1+"',className='"+value2+"',counselorID='"+value3+"',startDate='"+value4+"',endDate='"+value5+"' where classID = '"+value1+"'"; }
I am developing an web application with servlets and jsp. I have an issue to store images. I am storing images in folder and their relative path's in mysql database.
When I retrieve path from database then using <IMG> tag i have displayed image like:
Using MySQL to store the chat data/users and then recieve the chat data every time the chat table updates because someone entered a new message. I am woundering if this is the right way to do it or should try something else?
What I am looking for is someway to run a query each time the database has been updated or receive data from the database each 10 sec, is it even posible, if yes then how? Been trying to look into threading, but do not seem solve this problem and cant find any information about it.
I have a file called config.dedserver and on a JButton click I am editing the values in it using setProperty but it didn't work. It removed everything from the entire file and then added the properties.
I have been working on getting the merge sort working, I have a complteted code but am not getting the right results... Here is my code and the results are "876323149" ...
public class MergeSort { private static int[] local; // for use in copying private static int[] a; public static void main(String[] args) { int[] test = {2,3,1,4,7,8,6,3,9};
I had a game written in a 500x400 window using JFrame and a threaded JPanel. It used KeyListener to detect user input and worked just fine, problem was it was very click dependent and therefore I wanted to put it into fullscreen mode so I would no longer come across the problem of clicking outside the window and being taken out of the game. But when I ported the game to Full Screen Exclusive Mode the KeyListener no longer seems to be working and I have no clue why. I tried using KeyBindings as well, that code didn't work and is left commented out in the FSEM code.Here is my code for the windowed application:
import java.awt.Container; import javax.swing.*; public class Main extends JFrame{ private GamePanel panel; public Main(){ panel = new GamePanel();
I am trying to use the JList to display a list of students. Now, each student has a first name, last name and course taken. each courses taken by the student has its' own name, level and idNumber. For now, I am just trying to create my own custom JList model for the students. I have the custom model as well as the button event calling it. Unfortunately, when I click the button to display the student info added, the component is NOT fired up!..
I am not sure what I have done wrong regarding creating the component because I can display the information on the console and the list contains everything I have added but just to display it on the component is NOT working. I have broken the codes into sub classes, you can add the classes to the same package or create sub packages to insert individual classes.
The student class
public class Student { private String studentName; private String studentID ; public String getStudentName(){ return studentName;
I am currently writing two java classes (client and server). The client takes an input number form keyboard and sends it to the server. The server then multiplies this number by two and sends it back to the client. The numbers should also be printed to screen along the way, for example if I input the number 3 I should get
"From Client: 3" "From Server: 6"
They should continuously do this unless a negative number is received by the client, say for example the number -3 is sent to the server and it returns -6.
The code I have for the two classes so far is:
import java.io.*; import java.net.*; import java.nio.ByteBuffer; import java.util.Scanner; class Client { public static void main(String args[]) throws Exception { DatagramSocket clientSocket = new DatagramSocket();
[Code] .....
Currently, when I run the program all I get is an output of the number first entered. I am aware it requires a loop but I don't know where and what the condition should be.
Also if I wanted to adapt this so that it would take the integer from client and subtract two at the server and return to client who sends back to server to keep subtracting two unless it reaches a negative number at which point the client will terminate the program - how might I do this.
I do realise there needs to be a while loop in the above code, but I wanted to test it sent the number from client to server and its not doing it. All I get is a print screen of 'enter number' and then the number I enter.
I am currently working on a Java project, below are my attempts at coding so far:
public class MyZoo { // zoo identifier private String zooId; // a number used in generating a unique identifier for the next animal to be added to the zoo private int nextAnimalIdNumber; // zstorage for the Animal objects private TreeMap<String, Animal> animals;
[Code] ....
I currently cannot get the printAllAnimals() method to work as it should.
When executing the method printAllAnimals(), it does not do anything, when it is supposed to use the Collection object c, so that animals stored in the zoo can easily be checked.
I have written my whole java code in netbeans IDE and create database in MYSQL work bench and connected java Gui with this DBMS through requried driver.when i run this program from Netbeans IDE , my program successfully access the data from DBMS. But when i created this java gui exe file its not working and not accessing data from DBMS, and each times gives exception "Driver not found ".if there is no driver loaded in this program how this file is working when i run this file from netbeans .
public class AddArray { public static void main(String[] args) { int sum = 0; sum = addArray(myarray); System.out.println(" hello"); System.out.println("This program will create an array then pass the array to an method to be totaled"); int myarray[] = new int [6];
Server : Java Servlet Client : Simple JSP Communication : Server Sent Events every 1 second Here is the problem.
My code needed the server to send updates every one second to the client as stated above. Hence, I added a while loop with a sleep of 1000 milliseconds in the servlet code as shown below. The following strange behavior is observed:
- While the server is sending updates to the client, and the client window closes by mistake, the server does not stop sending updates It continues sending the data. - When the client is re-opened, it sends data much faster (almost double). For example, the server sends 60 seconds worth of updates (60 updates) in just 25-30 seconds. The server sends faster updates not only for this round of updates, but also for any subsequent updates.
This server behavior is much unexpected. Am I writing the server side code wrong? I have looked around a lot and only found while loop method for modifying the server update interval. Is there any other method which I am missing?
I am developing an application to share my client screen with server, it is working well on swing. But i want to develop as web application, i am trying to using applet. But i am facing the fallowing problem..,
1) The Applet screen also open and project also running well on server mechine. But unable to see the client screen on the server.
2) The problem may be to display the JDesktopPane or JInternalFrame.
My working Server Code extends withe JFrame..Java Code:
I've been working quite a bit with a login system the past couple of months and I now have a version that I would like to try "for real" by extracting it as a runnable .jar or .exe file. I've looked at a couple of guides that told me how to do this properly, but even after following every step precisely it didn't work.
One of the guides I tried: 3 Ways to Create an Executable File from Eclipse - wikiHow
Double clicking the file or selecting it and pressing enter does nothing, the computer loads for a second and then nothing happens. I don't receive any visible errors when extracting the program, either.
However, when running the file from the command prompt I do receive an odd error: Microsoft Windows [Version 6.2.9200] (c) 2012 Microsoft Corporation. All rights reserved.
C:UsersUserName>java -jar Login.jar Exception in thread "main" java.lang.IllegalArgumentException: input == null! at javax.imageio.ImageIO.read(Unknown Source) at LoginSystem.Data.updateData(Data.java:347) at LoginSystem.Data.<init>(Data.java:309) at LoginSystem.MainFrame.<init>(MainFrame.java:42) at LoginSystem.MainFrame.main(MainFrame.java:457)
C:UsersUserName>
I must say I don't quite understand the error, it seems to be unable to load an image which is odd considering the program works fine without any errors at all in Eclipse.
