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  • Gesture Based NetBeans Tip Infrastructure

    - by Geertjan
    All/most/many gestures you make in NetBeans IDE are recorded in an XML file in your user directory, "var/log/uigestures", which is what makes the Key Promoter I outlined yesterday possible. The idea behind it is for analysis to be made possible, when you periodically pass the gestures data back to the NetBeans team. See http://statistics.netbeans.org for details. Since the gestures in the 'uigestures' file are identifiable by distinct loggers and other parameters, there's no end to the interesting things that one is able to do with it. While the NetBeans team can see which gestures are done most frequently, e.g., which kinds of projects are created most often, thus helping in prioritizing new features and bugs, etc, you as the user can, depending on who and how the initiative is taken, directly benefit from your collected data, too. Tim Boudreau, in a recent article, mentioned the usefulness of hippie completion. So, imagine that whenever you use code completion, a tip were to appear reminding you about hippie completion. And then you'd be able to choose whether you'd like to see the tip again or not, etc, i.e., customize the frequency of tips and the types of tips you'd like to be shown. And then, it could be taken a step further. The tip plugin could be set up in such a way that anyone would be able to register new tips per gesture. For example, maybe you have something very interesting to share about code completion in NetBeans. So, you'd create your own plugin in which there'd be an HTML file containing the text you'd like to have displayed whenever you (or your team members, or your students, maybe?) use code completion. Then you'd register that HTML file in plugin's layer file, in a subfolder dedicated to the specific gesture that you're interested in commenting on. The same is true, not just for NetBeans IDE, but for anyone creating their applications on top of the NetBeans Platform, of course.

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  • AgroSense in Java Magazine November/December 2012

    - by Geertjan
    AgroSense, the Duke's Choice Award winning open source farm management system from the Netherlands, is featured in the hot-off-the-presses latest edition of the always awesome Java Magazine (November/December 2012): Read the whole article after subscribing for free to the magazine, via clicking the image above or by clicking this link. Note: If you're reading this and your sofware organization is doing anything at all that relates to farm management, consider porting your software to an AgroSense plugin. That would save you an immense amount of time and your users will get a comprehensive farm management system out of the box. Don't reinvent the wheel: create your farm management software on top of the AgroSense Platform!

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  • New Solaris 11.2 beta features: SMF stencils

    - by user13366125
    As much as there is often a lot discussion about configuration items inside the SMF repository (like the hostname), it brings an important advantage: It introduces the concept of dependencies to configuration changes. What services have be restarted when i change a configuration item. Do you remember all the services that are dependent on the hostname and need a restart after changing it? SMF solves this by putting the information about dependencies into it configuration. You define it with the manifests. However, as much configuration you may put into SMF, most applications still insists to get it's configuration inside the traditional configuration files, like the resolv.conf for the resolver or the puppet.conf for Puppet. So you need a way to take the information out of the SMF repository and generate a config file with it. In the past the way to do so, was some scripting inside the start method that generated the config file before the service started. Solaris 11.2 offers a new feature in this area. It introduces a generic method to enable you to create config files from SMF properties. It's called SMF stencils. (read more)

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  • Solaris 11 features: nscfg

    - by nospam(at)example.com (Joerg Moellenkamp)
    As you may have noticed many configuration tasks around name services have moved into the SMF in Solaris 11. However you don't have to use the svccfg command in order to configure them, you could still use the old files. However you can't just edit them, you have to import the data into the SMF repository. There are many reasons for this need but the ultimate one is in the start method. I will explain that later. In this article i want to explain, how nscfg can help you with with the naming service configuration of your system. Continue reading "Solaris 11 features: nscfg"

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  • Java EE Basic Training with Yakov Fain

    - by reza_rahman
    Those of us that have been around Java/Java EE for a little while sometimes tend to forget that Java is still an ever expanding ecosystem with many newcomers. Fortunately, not everyone misses this perspective, including well-respected Java veteran Yakov Fain. Yakov recently started a free online video tutorial series focused on Java and Java EE for absolute beginners. The first few parts of the series focused on Java SE but now Yakov is beginning to cover the very basics of Java EE. In a recent video he covered: The basics of the JCP, JSRs and Java EE How to get started with GlassFish 4 The basics of Servlets Developing Java EE/Servlets using Eclipse and GlassFish The excellent video is posted below. The slides for the tutorial series generally are available here. If there are folks you know that would benefit from this content, please do pass on word. Even if you are an experienced developer, it sometimes helps to sit back and review the basics... It's quite remarkable that someone of Yakov's stature took the time out to create content for absolute beginners. For those unaware, Yakov is one of the earliest Java champions and one would be very hard pressed to match his many contributions to the Java community. The tutorial demonstrates his continued passion, commitment and humility.

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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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  • How to trace a function array argument in DTrace

    - by uejio
    I still use dtrace just about every day in my job and found that I had to print an argument to a function which was an array of strings.  The array was variable length up to about 10 items.  I'm not sure if the is the right way to do it, but it seems to work and is not too painful if the array size is small.Here's an example.  Suppose in your application, you have the following function, where n is number of item in the array s.void arraytest(int n, char **s){    /* Loop thru s[0] to s[n-1] */}How do you use DTrace to print out the values of s[i] or of s[0] to s[n-1]?  DTrace does not have if-then blocks or for loops, so you can't do something like:    for i=0; i<arg0; i++        trace arg1[i]; It turns out that you can use probe ordering as a kind of iterator. Probes with the same name will fire in the order that they appear in the script, so I can save the value of "n" in the first probe and then use it as part of the predicate of the next probe to determine if the other probe should fire or not.  So the first probe for tracing the arraytest function is:pid$target::arraytest:entry{    self->n = arg0;}Then, if I want to print out the first few items of the array, I first check the value of n.  If it's greater than the index that I want to print out, then I can print that index.  For example, if I want to print out the 3rd element of the array, I would do something like:pid$target::arraytest:entry/self->n > 2/{    printf("%s",stringof(arg1 + 2 * sizeof(pointer)));}Actually, that doesn't quite work because arg1 is a pointer to an array of pointers and needs to be copied twice from the user process space to the kernel space (which is where dtrace is). Also, the sizeof(char *) is 8, but for some reason, I have to use 4 which is the sizeof(uint32_t). (I still don't know how that works.)  So, the script that prints the 3rd element of the array should look like:pid$target::arraytest:entry{    /* first, save the size of the array so that we don't get            invalid address errors when indexing arg1+n. */    self->n = arg0;}pid$target::arraytest:entry/self->n > 2/{    /* print the 3rd element (index = 2) of the second arg. */    i = 2;    size = 4;    self->a_t = copyin(arg1+size*i,size);    printf("%s: a[%d]=%s",probefunc,i,copyinstr(*(uint32_t *)self->a_t));}If your array is large, then it's quite painful since you have to write one probe for every array index.  For example, here's the full script for printing the first 5 elements of the array:#!/usr/sbin/dtrace -spid$target::arraytest:entry{        /* first, save the size of the array so that we don't get           invalid address errors when indexing arg1+n. */        self->n = arg0;}pid$target::arraytest:entry/self->n > 0/{        i = 0;        size = sizeof(uint32_t);        self->a_t = copyin(arg1+size*i,size);        printf("%s: a[%d]=%s",probefunc,i,copyinstr(*(uint32_t *)self->a_t));}pid$target::arraytest:entry/self->n > 1/{        i = 1;        size = sizeof(uint32_t);        self->a_t = copyin(arg1+size*i,size);        printf("%s: a[%d]=%s",probefunc,i,copyinstr(*(uint32_t *)self->a_t));}pid$target::arraytest:entry/self->n > 2/{        i = 2;        size = sizeof(uint32_t);        self->a_t = copyin(arg1+size*i,size);        printf("%s: a[%d]=%s",probefunc,i,copyinstr(*(uint32_t *)self->a_t));}pid$target::arraytest:entry/self->n > 3/{        i = 3;        size = sizeof(uint32_t);        self->a_t = copyin(arg1+size*i,size);        printf("%s: a[%d]=%s",probefunc,i,copyinstr(*(uint32_t *)self->a_t));}pid$target::arraytest:entry/self->n > 4/{        i = 4;        size = sizeof(uint32_t);        self->a_t = copyin(arg1+size*i,size);        printf("%s: a[%d]=%s",probefunc,i,copyinstr(*(uint32_t *)self->a_t));} If the array is large, then your script will also have to be very long to print out all values of the array.

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  • HTML5 development in PHP projects

    - by Tomas Mysik
    Today, we would like to show you how you can in NetBeans 7.4 develop your HTML5 applications directly in your PHP projects. And because everything has already been described on the NetBeans Web Client blog, we will just provide a link to this great blog post: HTML5 development in Java EE and PHP projects. Enjoy it! :) That's all for today, as always, please test it and report all the issues or enhancements you find in NetBeans Bugzilla. Also, please do not forget that all the comments here are moderated.

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  • Food For Tests: 7u12 Build b05, 8 with Lambda Preview b68

    - by $utils.escapeXML($entry.author)
    This week brought along new developer preview releases of the JDK and related projects. On the JDK 7 side, the Java™ Platform, Standard Edition 7 Update 12 Developer Preview Releases have been updated to 7u12 Build b05. On the JDK 8 side, as Mike Duigou announced on the lambda-dev mailing list, A new promotion (b68) of preview binaries for OpenJDK Java 8 with lambda extensions is now available at http://jdk8.java.net/lambda/. Happy testing!

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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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  • 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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  • Wanted Now: Your Feedback on Java EE 7!

    - by reza_rahman
    Work on Java EE 7 presses on under JSR 342. Things are shaping up nicely and Java EE 7 is now in the Early Draft Review stage. You can find out more and get involved by visiting the Java.net project for Java EE. There are now a number of important open issues that the Java EE expert group would like to get broad community feeback on. These issues include what new JSRs to add to the Java EE Full/Web Profile as well as how to better align CDI with Java EE. Help shape the future and voice your opinion on these critical open issues by taking the short survey posted here.

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  • The Freemium-Premium Puzzle

    The more time I spend thinking about the value of information, the more I found that digitalizing information significantly changed the 'information markets', potentially in an irreversible manner. The graph at the bottom outlines my current view. The existing business models tend to be the same in the digital and analogue information world, i.e. revenue is derived from a combination of consumers' payments and advertisement. Even monetizing 'meta-information' such as search engines isn't new. Just think of the once popular 'Who'sWho'. What really changed is the price-value ratio. The curve is pushed down, closer to the axis. You pay less for the same, or often even get more for less. If you recall the capabilities I described in relevance of information you will see that there are many additional features available for digital content compared to analogue content. I think this is a good 'blue ocean strategy' by combining existing capabilities in a new way. (Kim W.C. & Mauborgne, R. (2005) Blue Ocean Strategies. Boston: Harvard Business School Publishing.). In addition the different channels of digital information distribution significantly change the value of information. I will touch on this in one of my next blogs. Right now, many information providers started to offer 'freemium' content through digital channels, hoping to get a premium for the 'full' content. No freemium seems to take them out of business, because they are apparently no longer visible in today's most relevant channels of information consumption. But, the more freemium is provided, the lower the premium gets; a truly puzzling situation. To make it worse, channel providers increasingly regard information as a value adding and differentiating activity. Maybe new types of exclusive, strategic alliances will solve the puzzle, introducing new types of 'gate-keepers', which - to me - somehow does not match the spirit of the WWW and the generation Y's perception of information consumption and exchange.

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  • Maven Command Line for NetBeans RCP Developers

    - by Geertjan
    In the ongoing work being done on Maven documentation support for NetBeans Platform developers, the tutorial describing how to use the Maven command line to set up and develop applications on the NetBeans Platform has ben updated: http://platform.netbeans.org/tutorials/nbm-maven-commandline.html An interesting next step after following the tutorial above is to... open the result into the free community edition of IntelliJ IDEA: It's not hard to register the JDK and Maven in IntelliJ IDEA and to then run your application directly from there. The point is that there's no requirement to use NetBeans IDE if you want to create applications on top of its framework.

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  • Enterprise 2.0 Conference - this week!

    - by kellsey.ruppel
    We're excited to be at the Enterprise 2.0 Conference in Boston this week! We are looking forward to spending the next few days learning from Enterprise 2.0 thought-leaders and connecting with others who have an interest in social and collaborative technologies. If you are attending the conference, we encourage you to stop by booth #213, as we'd love to speak with you further about your challenges and success when it comes to social business transformation. New to social enterprise? Wondering what it means for your business? Take a look at how Bunny Inc. has transformed to become a social enterprise!

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  • Reduced Tree View in NetBeans IDE 7.2

    - by Geertjan
    Right-click within the Projects window in NetBeans IDE 7.2 and from the "View Java Packages As" menu, you can now choose "Reduced Tree".I never really understood the difference between "Reduced Tree" and the already existing "Tree". But it makes sense when you see it. Here's Reduced Tree view: And here's Tree view, where you can see that the "actions" and "nodes" packages above each have their own top level package nodes, which takes up more space than the above: What's cool is that your selected package view is persisted across restarts of the IDE. To be complete, here's the List view, which is the third option you have in the "View Java Packages As" menu: Seems to me like the new Reduced Tree view combines the best of the Tree view with the best of the List view! Related issue: http://netbeans.org/bugzilla/show_bug.cgi?id=53192

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  • Recent EC Meetings - RIM forfeits EC seat

    - by heathervc
    Materials and minutes from the JCP EC Face-to-Face Meeting, held September 2012 in Prague, are now available on the EC Meeting Summaries page.  Topics included JCP.Next, a JCP 2.8 progress report, Inactive JSRs, and two Spec Lead presentations. In October 2011, new EC Standing Rules went into effect. The Rules include the following: "Missing five meetings in a row, or missing more than two-thirds of all meetings in any consecutive twelve-month period, results in loss of EC membership."  Last week, the JCP EC met for their October EC teleconference meeting.  RIM missed this meeting, and has now missed five meetings in a row (see the attendance chart); therefore, RIM has forfeited their EC membership. Results from the 2012 EC Elections will be available on 30 October.  The new merged EC will go into effect on 12 November.

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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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  • Poll: How long will you wait before using Solaris 11 on production systems?

    - by nospam(at)example.com (Joerg Moellenkamp)
    When Sun released Solaris 10, it was my first migration phase to a new Solaris major release while being part of Sun. At that time i heard a lot of comments between "Oh, we will install it on new systems on day 1" to "oh ... not that fast ... we will wait ... we are not that fast ... we will do it in a year". I would like to get some additional insight and so i set up the poll plugin for s9y to get the answer to the question "How long will you wait before using Solaris 11 on production system?". Thank you for your participation!

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  • Named my RPi 512MB @jerpi_bilbo

    - by hinkmond
    To keep our multiple Raspberry Pi boards apart from each other, I've now named my RPi Model B w/512MB: "jerpi_bilbo", which stands for Java Embedded Raspberry Pi - Bilbo (named after the Hobbit from the J.R.R. Tolkien stories). I also, set up a Twitter account for him. You can follow him at: @jerpi_bilbo He's self-tweeting, manual prompted so far (using Java Embedded 7.0 and twitter4j Java library). Works great! I'm setting him up to be automated self-tweeting soon, so watch for that... Here's a pointer to the open source twitter4j Java library: download here Just unzip and extract out the twitter4j-core-2.2.6.jar and put it on your Java Embedded classpath. Here's how @jerpi_bilbo uses it to Tweet with his Java Embedded runtime: import twitter4j.*; import java.io.* public final class Tweet { public static void main(String[] args) { String statusStr = null; if ((args.length 0) && (args[0] != null)) { statusStr = args[0]; } else { statusStr = new String("Hello World!"); } // Create new instance of the Twitter class Twitter twitter = new TwitterFactory().getInstance(); try { Status status = twitter.updateStatus(statusStr); System.out.println ("Successfully updated the status to: " + status.getText()); } catch (Exception e) { e.printStackTrace(); } } } That's all you need. Java Embedded rocks the RPi! And, @jerpi_bilbo is alive... Hinkmond

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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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