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  • Is it the job of a developer to suggest IT requirements?

    - by anything
    I am the only developer working on a web application which is nearing to its end. Now we are looking into making it Live in maybe a couple of months time. This is a web application for a non IT company. Though they have their own internal IT team, they have asked me on what will be the hardware requirements for the live servers eg. RAM, 32 bit or 64 bit. Shouldn't the internal IT team be doing this or since I am the only person working on the project is it my resposiblity to let them know of the any specific hardware requiremnts which may impact the performance of the project? The reason I am asking this question is that, I have not this before. All the times I used to be given a server and asked to deploy apps on it. I never used to worry about the server configuration etc.

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  • SQL Injection: How it Works and How to Thwart it

    This is an extract from the book Tribal SQL. In this article, Kevin Feasel explains SQL injection attacks, how to defend against them, and how to keep your Chief Information Security Officer from appearing on the nightly news. NEW! The DBA Team in The Girl with the Backup TattooPina colada in the disk drives! How could any DBA do such a thing? And can the DBA Team undo the damage? Find out in Part 2 of their new series, 5 Worst Days in a DBA’s Life. Read the new article now.

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  • Social Media JSR 357 NOT approved by Executive Committee

    - by alexismp
    JSR 357 (Social Media API) has not passed the initial ballot which means, according to the JCP rules, that "the JSR submitter(s) who may revise the JSR and resubmit it within 14 days". Given the comments associated with the negative votes, it may be challenging for the submitters to address the concerns about the scope assessed by many as being too wide. Standardization is a difficult task and the JCP (the Executive Committee in fact) played its role by pointing out the challenges ahead of such a JSR as it was envisioned by its submitters, and thus the risk of never completing. If anything this proves that the JCP is working as expected. For those disappointed that Java will not get a standard "Social Media API" (for now at least), let me remind you of the recent open-sourcing of DaliCore.

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  • JSR 348, 355, and 358: Moving JCP Forward

    - by arungupta
    The three-step JCP evolution consists of the following JSRs: • JSR 348, JCP transparency • JSR 355, Merging the two existing Executive Committees • JSR 358, complex issues moved postponed from JSR 348 The JSR 348 is already completed and JSR 355 is scheduled to be complete later this year. JSR 358 was recently filed and plans to revise several items such as modify the JSPA, Process Document, and a large number of complex issues. Because of the nature and scope of work, the Expert Group consists of representatives from all companies in the Executive Committee. Following the process set by JSR 348, all the work is done in open at jsr358.java.net. All the email discussions are here and JIRA here. Read Patrick Curran's blog for more details as well. The JSR review ballot ends on Jul 9th however the work has already happening for the past few months. Now is your chance to contribute and make JCP more effective!

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  • Free & Open Source XML Editor Built on Maven

    - by Geertjan
    Here you can download the sources of an XML Editor that uses libraries from NetBeans IDE 7.3 Beta 2 as its basis, while using Maven as its build system: http://java.net/projects/nb-api-samples/sources/api-samples/show/versions/7.3/misc/XMLEditorInMavenNBRCP And here's what it looks like to the user: Note: The Favorites window has been rebranded as "File Browser" and Nimbus is used for the look and feel, thanks to a .conf file that is registered in the POM of the application project.  The cool part is that I didn't type one line of code to get the above result and that only those pieces that an XML Editor actually needs are included in the application, though it could be pruned even further.

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  • Synchronized Property Changes (Part 4)

    - by Geertjan
    The next step is to activate the undo/redo functionality... for a Node. Something I've not seen done before. I.e., when the Node is renamed via F2 on the Node, the "Undo/Redo" buttons should start working. Here is the start of the solution, via this item in the mailing list and Timon Veenstra's BeanNode class, note especially the items in bold: public class ShipNode extends BeanNode implements PropertyChangeListener, UndoRedo.Provider { private final InstanceContent ic; private final ShipSaveCapability saveCookie; private UndoRedo.Manager manager; private String oldDisplayName; private String newDisplayName; private Ship ship; public ShipNode(Ship bean) throws IntrospectionException { this(bean, new InstanceContent()); } private ShipNode(Ship bean, InstanceContent ic) throws IntrospectionException { super(bean, Children.LEAF, new ProxyLookup(new AbstractLookup(ic), Lookups.singleton(bean))); this.ic = ic; setDisplayName(bean.getType()); setShortDescription(String.valueOf(bean.getYear())); saveCookie = new ShipSaveCapability(bean); bean.addPropertyChangeListener(WeakListeners.propertyChange(this, bean)); } @Override public Action[] getActions(boolean context) { List<? extends Action> shipActions = Utilities.actionsForPath("Actions/Ship"); return shipActions.toArray(new Action[shipActions.size()]); } protected void fire(boolean modified) { if (modified) { ic.add(saveCookie); } else { ic.remove(saveCookie); } } @Override public UndoRedo getUndoRedo() { manager = Lookup.getDefault().lookup( UndoRedo.Manager.class); return manager; } private class ShipSaveCapability implements SaveCookie { private final Ship bean; public ShipSaveCapability(Ship bean) { this.bean = bean; } @Override public void save() throws IOException { StatusDisplayer.getDefault().setStatusText("Saving..."); fire(false); } } @Override public boolean canRename() { return true; } @Override public void setName(String newDisplayName) { Ship c = getLookup().lookup(Ship.class); oldDisplayName = c.getType(); c.setType(newDisplayName); fireNameChange(oldDisplayName, newDisplayName); fire(true); fireUndoableEvent("type", ship, oldDisplayName, newDisplayName); } public void fireUndoableEvent(String property, Ship source, Object oldValue, Object newValue) { ReUndoableEdit reUndoableEdit = new ReUndoableEdit( property, source, oldValue, newValue); UndoableEditEvent undoableEditEvent = new UndoableEditEvent( this, reUndoableEdit); manager.undoableEditHappened(undoableEditEvent); } private class ReUndoableEdit extends AbstractUndoableEdit { private Object oldValue; private Object newValue; private Ship source; private String property; public ReUndoableEdit(String property, Ship source, Object oldValue, Object newValue) { super(); this.oldValue = oldValue; this.newValue = newValue; this.source = source; this.property = property; } @Override public void undo() throws CannotUndoException { setName(oldValue.toString()); } @Override public void redo() throws CannotRedoException { setName(newValue.toString()); } } @Override public String getDisplayName() { Ship c = getLookup().lookup(Ship.class); if (null != c.getType()) { return c.getType(); } return super.getDisplayName(); } @Override public String getShortDescription() { Ship c = getLookup().lookup(Ship.class); if (null != String.valueOf(c.getYear())) { return String.valueOf(c.getYear()); } return super.getShortDescription(); } @Override public void propertyChange(PropertyChangeEvent evt) { if (evt.getPropertyName().equals("type")) { String oldDisplayName = evt.getOldValue().toString(); String newDisplayName = evt.getNewValue().toString(); fireDisplayNameChange(oldDisplayName, newDisplayName); } else if (evt.getPropertyName().equals("year")) { String oldToolTip = evt.getOldValue().toString(); String newToolTip = evt.getNewValue().toString(); fireShortDescriptionChange(oldToolTip, newToolTip); } fire(true); } } Undo works when rename is done, but Redo never does, because Undo is constantly activated, since it is reactivated whenever there is a name change. And why must the UndoRedoManager be retrieved from the Lookup (it doesn't work otherwise)? Don't get that part of the code either. Help welcome!

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  • Context Sensitive JTable (Part 2)

    - by Geertjan
    Now, having completed part 1, let's add a popup menu to the JTable. However, the menu item in the popup menu should invoke the same Action as invoked from the toolbar button created yesterday. Add this to the constructor created yesterday: Collection<? extends Action> stockActions =         Lookups.forPath("Actions/Stock").lookupAll(Action.class); for (Action action : stockActions) {     popupMenu.add(new JMenuItem(action)); } MouseListener popupListener = new PopupListener(); // Add the listener to the JTable: table.addMouseListener(popupListener); // Add the listener specifically to the header: table.getTableHeader().addMouseListener(popupListener); And here's the standard popup enablement code: private JPopupMenu popupMenu = new JPopupMenu(); class PopupListener extends MouseAdapter { @Override public void mousePressed(MouseEvent e) { showPopup(e); } @Override public void mouseReleased(MouseEvent e) { showPopup(e); } private void showPopup(MouseEvent e) { if (e.isPopupTrigger()) { popupMenu.show(e.getComponent(), e.getX(), e.getY()); } } }

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  • New Java EE 6 Hands-On lab, Devoxx-approved!

    - by alexismp
    A new Java EE 6 HOL (Hands-On Lab) was successfully used yesterday at Devoxx with a room packed with enthusiast conference participants. This is new material which covers a lot of Java EE ground in a single document. As it is the case for most GlassFish-related labs, the list of software requirements is dead-simple and short: a recent JDK (6 or 7) and NetBeans 7.x ("Java EE" or "All") which comes with GlassFish. Of course GlassFish can also be downloaded separately and used from other IDEs such as Eclipse and IntelliJ or even (Emacs). The didactic nature of the HOL document should make it useful for anyone interested in learning Java EE 6 on their own time and pace. If you have feedback about the content or about GlassFish, make sure you voice your concerns (or praises) to the GlassFish Users alias as indicated in the document. Feedback will be taken into account in the form of updates to the document as well as enhancements to GlassFish (ideally in 3.1.2).

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  • Screencast: "Unlocking the Java EE Platform with HTML5"

    - by Geertjan
    The Java EE platform aims to increase your productivity and reduce the amount of scaffolding code needed in Java enterprise applications. It encompasses a range of specifications, such as JPA, EJB, JSF, and JAX-RS. How do these specifications fit together in an application, and how do they relate to each other? And how can HTML5 be used to leverage Java EE? In this recording of a session I did last week at Oredev in Malmo, Sweden, you learn how Java EE works and how it can be integrated with HTML5 front ends, via HTML, JavaScript, and CSS.

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  • HTML Tidy for NetBeans IDE 7.4

    - by Geertjan
    The NetBeans HTML5 editor is pretty amazing, working on an extensive screencast on that right now, to be published soon. One thing missing is HTML Tidy integration, until now: As you can see, in this particular file, HTML Tidy finds 6 times more problems (OK, some of them maybe false negatives) than the standard NetBeans HTML hint infrastructure does. You can also run the scanner across the whole project or all projects. Only HTML files will be scanned by HTML Tidy (via JTidy) and you can click on items in the window above to jump to the line. Future enhancements will include error annotations and hint integration, some of which has already been addressed in this blog over the years. Download it from here: http://plugins.netbeans.org/plugin/51066/?show=true Sources are here. Contributions more than welcome: https://java.net/projects/nb-api-samples/sources/api-samples/show/versions/7.4/misc/HTMLTidy

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  • Java EE/GlassFish Testimonials

    - by reza_rahman
    A key question to answer for Java EE and GlassFish centers on proof of successful adoption. To that end, we have made a serious effort to ask Java EE/GlassFish adopters to tell us their stories. There were a number of such stories shared at this year's GlassFish Community event at JavaOne. One that particularly stands out is a testimonial by celebrated Java EE advocate and independent consultant Adam Bien. For those of you that don't know it, Adam was given the "Top Java Ambassador" award by this year's JAX Innvovation Awards. See what Adam had to say here. We'll share more of these testimonials in days to come, so stay tuned.

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  • JavaFX: Use a Screen with your Scene!

    - by user12610255
    Here's a handy tip for sizing your application. You can use the javafx.stage.Screen class to obtain the width and height of the user's screen, and then use those same dimensions when sizing your scene. The following code modifies default "Hello World" application that appears when you create a new JavaFX project in NetBeans. package screendemo; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.stage.Stage; import javafx.stage.Screen; import javafx.geometry.Rectangle2D; public class ScreenDemo extends Application { public static void main(String[] args) { Application.launch(args); } @Override public void start(Stage primaryStage) { primaryStage.setTitle("Hello World"); Group root = new Group(); Rectangle2D screenBounds = Screen.getPrimary().getVisualBounds(); Scene scene = new Scene(root, screenBounds.getWidth(), screenBounds.getHeight()); Button btn = new Button(); btn.setLayoutX(100); btn.setLayoutY(80); btn.setText("Hello World"); btn.setOnAction(new EventHandler() { public void handle(ActionEvent event) { System.out.println("Hello World"); } }); root.getChildren().add(btn); primaryStage.setScene(scene); primaryStage.show(); } } Running this program will set the Stage boundaries to visible bounds of the main screen. -- Scott Hommel

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  • Result of the "How long do you wait before Solaris 11 gets on your prod systems?"

    - by nospam(at)example.com (Joerg Moellenkamp)
    I just removed the poll at 10:52, so this is the final result: My conclusions out of it: While the removal of UltraSPARC I to VI+ support in Solaris 11 may hit some of the people voting in the categories "Wait?" to "6 month", most of the users keep Solaris 10 running on their existing system anyway or migrate that late that even the newest system have reached their end-of-service-live or are near of it, so a migration doesn't sound that feasible. So i assume Product Management was right with their decision to remove the support in order to make the feature i can't talk of possible, as i don't think that many of the early migrators are still using the system in question, as most systems have reached EOSL. Didn't thought that there would be people waiting three years and more ...

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  • TraceTune shows Reads graphically

    - by Bill Graziano
    TraceTune now shows a graphical view of logical reads for each SQL statement in a trace file.  The width of the colored bar in the screen capture below is the percentage of logical reads for that statement.  The absolute number of reads is shown to the right. Any statement that has a user entered comment is shown in bold.  If you hover over the statement it will show the most recent comment for that statement.

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  • JSR Updates

    - by heathervc
    JSR 359, SIP Servlet 2.0, is a new JSR that has been submitted for JSR Review.  The review closes 16 July; the JSR Approval Ballot will be 17-20 July 2012. JSR 355, JCP Executive Committee Merge, has passed the Public Review Ballot and a Proposed Final Draft is now available for review. JSR 340, Java Servlet 3.1 Specification, has posted an Early Draft Review.  The review closes 1 August 2012.

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  • Using Dynamic SQL in Stored Procedures

    Dynamic SQL allows stored procedures to “write” or dynamically generate their SQL statements. The most common use case for dynamic SQL is stored procedures with optional parameters in the WHERE clause. These are typically called from reports or screens that have multiple, optional search criteria. This article describes how to write these types of stored procedures so they execute well and resist SQL injection attacks.

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  • Using the Coherence ConcurrentMap Interface (Locking API)

    - by jpurdy
    For many developers using Coherence, the first place they look for concurrency control is the com.tangosol.util.ConcurrentMap interface (part of the NamedCache interface). The ConcurrentMap interface includes methods for explicitly locking data. Despite the obvious appeal of a lock-based API, these methods should generally be avoided for a variety of reasons: They are very "chatty" in that they can't be bundled with other operations (such as get and put) and there are no collection-based versions of them. Locks do directly not impact mutating calls (including puts and entry processors), so all code must make explicit lock requests before modifying (or in some cases reading) cache entries. They require coordination of all code that may mutate the objects, including the need to lock at the same level of granularity (there is no built-in lock hierarchy and thus no concept of lock escalation). Even if all code is properly coordinated (or there's only one piece of code), failure during updates that may leave a collection of changes to a set of objects in a partially committed state. There is no concept of a read-only lock. In general, use of locking is highly discouraged for most applications. Instead, the use of entry processors provides a far more efficient approach, at the cost of some additional complexity.

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  • Reading XML Content

    using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Xml.Linq; using System.Diagnostics; using System.Threading; using System.Xml; using System.Reflection; namespace XMLReading { class Program     { static void Main(string[] args)         { string fileName = @"C:\temp\t.xml"; List<EmergencyContactXMLDTO> emergencyContacts = new XmlReader<EmergencyContactXMLDTO, EmergencyContactXMLDTOMapper>().Read(fileName); foreach (var item in emergencyContacts)             { Console.WriteLine(item.FileNb);             }          }     } public class XmlReader<TDTO, TMAPPER> where TDTO : BaseDTO, new() where TMAPPER : PCPWXMLDTOMapper, new()     { public List<TDTO> Read(String fileName)         { XmlTextReader reader = new XmlTextReader(fileName); List<TDTO> emergencyContacts = new List<TDTO>(); while (true)             {                 TMAPPER mapper = new TMAPPER(); bool isFound = SeekElement(reader, mapper.GetMainXMLTagName()); if (!isFound) break;                 TDTO dto = new TDTO(); foreach (var propertyKey in mapper.GetPropertyXMLMap())                 { String dtoPropertyName = propertyKey.Key; String xmlPropertyName = propertyKey.Value;                     SeekElement(reader, xmlPropertyName);                     SetValue(dto, dtoPropertyName, reader.ReadElementString());                 }                 emergencyContacts.Add(dto);             } return emergencyContacts;         } private void SetValue(Object dto, String propertyName, String value)         { PropertyInfo prop = dto.GetType().GetProperty(propertyName, BindingFlags.Public | BindingFlags.Instance);             prop.SetValue(dto, value, null);         } private bool SeekElement(XmlTextReader reader, String elementName)         { while (reader.Read())             { XmlNodeType nodeType = reader.MoveToContent(); if (nodeType != XmlNodeType.Element)                 { continue;                 } if (reader.Name == elementName)                 { return true;                 }             } return false;         }     } public class BaseDTO     {     } public class EmergencyContactXMLDTO : BaseDTO     { public string FileNb { get; set; } public string ContactName { get; set; } public string ContactPhoneNumber { get; set; } public string Relationship { get; set; } public string DoctorName { get; set; } public string DoctorPhoneNumber { get; set; } public string HospitalName { get; set; }     } public interface PCPWXMLDTOMapper     { Dictionary<string, string> GetPropertyXMLMap(); String GetMainXMLTagName();     } public class EmergencyContactXMLDTOMapper : PCPWXMLDTOMapper     { public Dictionary<string, string> GetPropertyXMLMap()         { return new Dictionary<string, string>             {                 { "FileNb", "XFileNb" },                 { "ContactName", "XContactName"},                 { "ContactPhoneNumber", "XContactPhoneNumber" },                 { "Relationship", "XRelationship" },                 { "DoctorName", "XDoctorName" },                 { "DoctorPhoneNumber", "XDoctorPhoneNumber" },                 { "HospitalName", "XHospitalName" },             };         } public String GetMainXMLTagName()         { return "EmergencyContact";         }     } } span.fullpost {display:none;}

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  • Hello Again, San Francisco

    - by Geertjan
    From the moment I got to the airport in Amsterdam, I've been bumping into JavaOne pilgrims today. Finally got to my hotel, after a pretty good flight (and KLM provides great meals, which helps a lot), and a rather long wait at customs (serves me right for getting seat 66C in a plane with 68 rows). And, best of all, on Twitter I've been seeing a few remarks around the Duke's Choice Awards for this year. The references all point to the September - October issue of the Java Magazine, where page 24 shows the following: So, from page 24 onwards, you can read all about the above applications. What's especially cool is that three of the above are applications created on top of the NetBeans Platform! That's AgroSense (farm management software), MICE (NATO system for defense and battle-space operations), and Level One Registration Tool (UN Refugee Agency sofware for managing refugees). Congratulations to all the winners, looking forward to learning more about them all during the coming days here at the conference.

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  • JSR updates - First Merged EC Ballots

    - by Heather VanCura
    As the second part of the JCP.Next effort, JCP 2.9 launched 2 weeks ago on 13 November, and the first JCP EC ballots with the Merged EC have concluded.   JSR 339, JAX-RS 2.0: The Java API for RESTful Web Services, passed EC Public Review Ballot and was approved by the EC -- 22 yes votes, 2 abstain, 2 did not vote -- view results. JSR 349, Bean Validation 1.1, passed EC Public Review Ballot and was approved by the EC --17 yes votes, 2 abstain, 5 did not vote --  view results.

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  • JavaFX in a JSF 2.0 Custom Tag?

    - by Geertjan
    I followed these instructions and now have a simple JSF 2.0 tag handler: The reason I created this is because I'm curious about whether it would be possible to change the tag created above: <my:hello name="Jack" /> ...to something like this: <my:chart type="pie" xAxis="${some-expression}" yAxis="${some-expression}" width="300" height="500" /> Has anyone tried this? That could be a way to incorporate a JavaFX chart into a Java EE application. That's different to how Adam Bien is doing it in LightFish, but might be a simpler and more reusable way of doing the same thing.

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