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  • JavaOne 2012 in Review

    - by Janice J. Heiss
    Noted freelance writer Steve Meloan has a new article up on otn/java, titled, “JavaOne 2012 Review: Make the Future Java” in which he summarizes the happenings at JavaOne 2012. Along the way, he reminds us that if the future turns out to be anything like the past, Java will do fine: The repeated theme for this year's conference was ‘Make the Future Java,’ and according to recent stats, the groundwork is already firmly in place:    There are 9 million Java developers worldwide.    Three billion devices run Java.    Five billion Java Cards are in use.    One hundred percent of Blu-ray Disc players ship with Java.    Ninety-seven percent of enterprise desktops run Java.    Eighty-nine percent of PC desktops run Java.This year's content curriculum program was organized under seven technical tracks:    Core Java Platform    Development Tools and Techniques    Emerging Languages on the JVM    Enterprise Service Architectures and the Cloud    Java EE Web Profile and Platform Technologies    Java ME, Java Card, Embedded, and Devices    JavaFX and Rich User Experiences”Meloan artfully reminds us of how JavaOne makes learning fun. Have a look at the article here.

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  • Ruby using the Gosu framework: why it runs slow first time?

    - by Omega
    I'm creating a Ruby game using the Gosu framework. All good. Sometimes, when I run the game, it has some kind of slow startup, and probably it will be rather slow during the whole game. So I close it and... open it again. It is very likely that it will startup quickly and the whole game will run smoothly and fast. Why is that? What is this phenomenon? Is it faster because of some cache stored or whatever since the first run? (But why would cache be stored? If the app dies, I would expect no references at all etc...) Ruby, Windows 7.

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  • Technical Article: Experimenting with Java Timers

    - by Tori Wieldt
    OTN's new tech article is "Experimenting with Java Timers" by T. Lamine Ba. This article studies time—how Java handles timers and the scheduling of tasks. Java timers are utilities that let you execute threads or tasks at a predetermined future time, and these tasks can be repeated according to a set frequency. The article starts with a simple "Hello World" program in a web application that's composed of JavaServer Pages (JSP) and uses the model-control-view (MVC) design pattern. The IDE used in this article is NetBeans IDE 7.1, but you can use any IDE that supports Java. "Experimenting with Java Timers" demonstrates how to get started scheduling jobs with Java. To learn about Swing timers, check out the Java tutorial "How to Use Swing Timers" and additional information in the Java Platform, Standard Edition 7 API Specification for Class Timer. 

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  • GZipped Images - Is It Worth?

    - by charlie
    Most image formats are already compressed. But in fact, if I take an image and compress it [gzipping it], and then I compare the compressed one to the uncompressed one, there is a difference in size, even though not such a dramatic difference. The question is: is it worth gzipping images? the content size flushed down to the client's browser will be smaller, but there will be some client overhead when de-gzipping it. Please advise.

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  • Normal Redundancy (Double Mirroring) Option Available

    - by TammyBednar
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif";} The Oracle Database Appliance 2.4 Patch was released last week and provides you an option of ASM normal redundancy (double mirroring) during the initial deployment of the Database Appliance. The default deployment of the Oracle Database Appliance is high redundancy for the +DATA and +RECO disk groups. While there is 12TB of raw shared storage available, the Database Backup Location and Disk Group Redundancy govern how much usable storage is presented after the initial deployment is completed. The Database Backup Location options are Local or External. When the Local Backup Option is selected, this means that 60% of the available shared storage will be allocated for the Fast Recovery Area that contains database backups and archive logs. The External Backup Option will allocate 20% of the available shared storage to the Fast Recovery Area. So, let’s look at an example of High Redundancy and External Backups. Disk Group Redundancy – High --> Triple Mirroring to provide ~4TB of available storage Database Backup Location – External --> 20% of available shared storage allocated to +RECO +DATA = 3.2TB of usable storage, +RECO = 0.8TB of usable storage What about Normal Redundancy with External Backups? Disk Group Redundancy – Normal --> Double Mirroring to provide ~6TB of available storage Database Backup Location – External --> 20% of available shared storage allocated to +RECO +DATA = 4.8TB of usable storage, +RECO = 1.2TB of usable storage As a best practice, we would recommend using Normal Redundancy for your test and/or development Oracle Database Appliances and High Redundancy for production.

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  • HTML5 - Does it have the power to handle a large 2D game with a huge world?

    - by user15858
    I have been using XNA game studio, but due to private reasons (as well as the ability to publish anywhere & my heavy interest in isogenic engine), I would like to switch to HTML5. However, I have very high 2D graphic demands for my game. The game itself will have a HDD size of anywhere between 6GB (min) to 12GB (max) which would be a full game deployed offline. The size of the images aren't significantly large, so streaming would be entirely possible if only those assets required were streamed as needed. The game has a massive file size because of the sheer amount of content. For some images or spritesheets, they would be quite massive. (ex. a very large Dragon, which if animated in a spritesheet would be split into two 4096x4096 sheets or one 8192x8192 sheet). Most assets would be very small, and about 7MB for a full character with 15 animations in every direction (all animations not required immediately) so in the size of a few hundred KB to download before the game loads. My question, however, is if the graphical power of HTML5 is enough to animate several characters on screen at once, when it flips through frames quite rapidly. All my sprites have about 25 frames per animation, 5 directions (a spritesheet for each direction & animation), and run at 30fps. Upon changing direction, animation, or a new character entering, spritesheets would change and be constantly loading/unloading. If I pack all directions in a single sheet, it would be about 2048x2048 per sheet. Most frameworks have no problem with this, but I am afraid from what I read that HTML5's graphical capabilities will limit me. Since it takes significant time simply to animate characters in any language, I'd like a quick answer.

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  • Getting the most out of My Oracle Support

    - by JanSyss
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Have you often wondered where to go to find the latest information about My Oracle Support? Or are you a new user who simply needs help getting started with using My Oracle Support? The My Oracle Support User Resource Center provides easy access to what’s new, help and training to commonly used features, frequently asked questions, and more. Here you will find: My Oracle Support Speed Training – each module is less than 10 minutes Working Effectively with Support best practices – get the most out of your support experience Advisor Webcast Program – product based training with an interactive forum to ask questions  Additionally there are many ways to stay informed about My Oracle Support: Follow us on Twitter by subscribing to myoraclesupport Set up “Hot Topic” notifications once you log into My Oracle Support (Settings -> Hot Topics) Check out the “Stay Informed” content on the Get Proactive page for your product /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";}

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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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  • Java EE 7 support in Eclipse 4.3

    - by arungupta
    Eclipse Kepler (4.3) features 71 different open source projects and over 58 million LOC. One of the main themes of the release is the support for Java EE 7. Kepler specifically added support for the features mentioned below: Create Java EE 7 Eclipse projects or using Maven New facets for JPA 2.1, JSF 2.2, Servlet 3.1, JAX-RS 2.0, EJB 3.2 Schemas and descriptors updated for Java EE 7 standards (web.xml, application.xml, ejb-jar.xml, etc) Tolerance for JPA 2.1 such as features can be used without causing invalidation and content assist for UI (JPA 2.1) Support for NamedStoredProcedureQuery (JPA 2.1) Schema generation configuration in persistence.xml (JPA 2.1) Updates to persistence.xml editor with the new JPA 2.1 properties Existing features support EE7 (Web Page Editor, Palette, EL content assist, annotations, JSF tags, Facelets, etc) Code generation wizards tolerant of EE7 (New EJB, Servlet, JSP, etc.) A comprehensive list of features added in this release is available in Web Tools Platform 3.5 - New and Noteworthy. Download Eclipse 4.3 and Java EE 7 SDK and start playing with Java EE 7! Oracle Enterprise Pack for Eclipse was released recently that uses Eclipse Kepler RC3 but will be refreshed soon to include the final bits.

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  • How selective do we need to be for an index to be used?

    - by TiborKaraszi
    You know the answer already: It depends. But I often see some percentage value quoted and the point of this post is to show that there is no such percentage value. To get the most out of this blog post, you should understand the basic structure for an index, i.e. how the b+ tree look like. You should also understand the difference between a clustered and a non-clustered index. In essence, you should be able to visualize these structures and searches through them as you read the text. If you find...(read more)

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  • Random Cache Expiry

    - by mahemoff
    I've been experimenting with random cache expiry times to avoid situations where an individual request forces multiple things to update at once. For example, a web page might include five different components. If each is set to time out in 30 minutes, the user will have a long wait time every 30 minutes. So instead, you set them all to a random time between 15 and 45 minutes to make it likely at most only one component will reload for any given page load. I'm trying to find any research or guidelines on this topic, e.g. optimal variance parameters. I do recall seeing one article about how Google (?) uses this technique, but can't locate it, and there doesn't seem to be much written about the topic.

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  • Can you apply noatime on Ext3 partitions at realtime?

    - by bzero
    an application accesses a disk directory containing about 3 million files (including directories). I would like to apply the noatime option for that filesystem and I would like to know whether I can do that while applications are running and accessing that filesystem. the command I'd apply would look like this: mount -o remount,noatime / Any experience with that? I run one single application using the file system, and it is a 100% Java application (1 JVM running). Ubuntu Version: 9.10 (Karmic) Thanks!

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  • Reliable Storage Systems for SQL Server

    By validating the IO path before commissioning the production database system, and performing ongoing validation through page checksums and DBCC checks, you can hopefully avoid data corruption altogether, or at least nip it in the bud. If corruption occurs, then you have to take the right decisions fast to deal with it. Rod Colledge explains how a pessimistic mindset can be an advantage

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  • Java Thriving in Oracle's hands

    - by Tori Wieldt
    IDC has published a Technology Assessment of Oracle's stewardship of Java titled "The State of Java: Two and a Half Years After the Acquisition." The overall IDC opinion is that Java under Oracle's stewardship is thriving. Report highlights include: The successful delivery of Java SE 7, which had been stalled at Sun Microsystems Articulation of realistic road maps for Java EE 7 and Java SE 8 The healthy growth of the Java ecosystem The decisiveness with which Oracle handled the Apache Harmony dispute Key vendors joining the OpenJDK including IBM, Apple, and SAP More and more programming languages being hosted on the Java Virtual Machine(JVM) Java's role in major computing trends including Mobile, Cloud, Big Data and Social You can access the full report here (PDF).

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  • Temporary Post Used For Theme Detection (2c152d1d-b299-442d-8586-f901f2ae7155 – 3bfe001a-32de-4114-a6b4-4005b770f6d7)

    - by Gopinath
    This is a temporary post that was not deleted. Please delete this manually. (095f0c04-8773-4c8c-8925-410f694fb4f4 – 3bfe001a-32de-4114-a6b4-4005b770f6d7) This article titled,Temporary Post Used For Theme Detection (2c152d1d-b299-442d-8586-f901f2ae7155 – 3bfe001a-32de-4114-a6b4-4005b770f6d7), was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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  • New DMV–yes… no… that’s complicated

    - by Michael Zilberstein
    Remember the excitement about new sys.dm_exec_query_profiles DMV? It promised to be a gamechanger, providing query visibility at a runtime and easily extractable information about heavy iterators in execution plan. So it has been announced but missing. Now in CTP2 it is finally here. So, singing one of my favorite Queen songs “… It finally happened - I’m slightly mad…” , I tried to observe query execution data at a runtime. And… nothing. Query is running, DMV is empty. That’s really disappointing...(read more)

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  • New Nokia SDK 2.0 for Java (beta)

    - by Tori Wieldt
    Nokia recently launched the Asha 305, 306, and 311, which are full touch devices with smartphone-like functionality at a low price. This makes them particularly attractive to consumers in the developing and developed world who may not be able to afford a smartphone but have a strong demand for apps and the smartphone experience. The Asha phones are the latest addition to Nokia's Series 40 platform, all of which support Java ME. The SDK includes new Full Touch API's (e.g. supporting pinch zoom) and Sensor support delivering an enhanced App experience. It also adds improved Maps API support for creating socio-local apps. There are a number of improvements in the tools including the Nokia IDE for Java ME with in-build Device-SDK Manager. Many code examples, training videos, webinars and sample code will help get you started. Porting guides and sample code show you how to port your android app to Java ME. If you don't have access to the hardware you can use Remote Device Access to test on real hardware that's remotely hosted for free. You can also find Light Weight UI Toolkit (LWUIT) support, which can speed development significantly. Both In-App Advertising and In-App Purchase (beta) is supported. Here's a great revenue-making opportunity for developers and a great way of reaching a new app-hungry mass-market audience. Download the new Nokia SDK 2.0 for Java (Beta) and get developing! 

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  • DXperience v2010 vol 2 Review

    - by kulrom
    Hi guys, this is my second review of these controls, and it will be quite different than the first. A few months ago I was engaged by a client to develop a web based application. He asked me (I guess they all ask the same) to make it good looking and attractive. The first thing I thought of when I heard this was "I must renew my DXperience subscription". And now I am glad I did that. Before I continue, I would like to say something to those readers who are totally new to DXperience. Guys, we all know that one of the more frustrating things for the ASP.NET developers is designing the good looking application. Well folks, your troubles are over! The DXperience takes much of the agony out of developing and designing an outstanding web application. Here we go!...(read more)

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  • How do I prevent Ubuntu gradually slowing down to a stop?

    - by user29165
    I really do not know what is causing the problem of my desktop environment (D.E.) gradually slowing down. It seems to happen in Gnome 3.2, LXDE, XFCE, and KDE. I am running Ubuntu 11.10 and this problem started happening from a fresh install. I have noticed that if I restart Gnome or otherwise re-log-in with any of the D.E.s the speed resets to normal. I don't seem to have and memory leaks that account for it and there are not any processes that are using excessive CPU cycles. Due to the symptoms I am guessing that there is an underlying package that interacts with all D.E.s that is the source of the problem. Just to clarify, in extreme situations, if I let the slowdown continue without a restart of the D.E. my system will finally get to a point where everything, even my clock, freezes. The time over which Gnome slows down (noticeably after 17 hrs) is much less than LXDE, or XFCE but eventually they freeze as well. I didn't mention Unity since I haven't used it enough to verify the problem, but I don't see why it should be different. Just in case this is relevant, I Suspend my computer rather than turn it off. I do this because of the greatly reduced load time and the 17 hrs I stated above is actual up-time, not time where the D.E. is actually active. However, the slow down does not seem to be affected by how long the computer has been in suspend mode. I know that it is possible that this problem is due to an interaction between two or more of the applications that I use and as such it may not be able to be duplicated by others. In the end I am just wondering (a) are other people experiencing this issue and (b) does anyone have some advice on where to start looking for a solution if one is not already known. I am even open to the idea of switching to the beta release of 12.04 if anyone thinks it will solve the problem. Edit: I took a video of my latest freeze that you can watch at http://youtu.be/flKUqUzCmdE, sorry about the audio. Edit: Since that video I checked my memory for errors and tried installing the proprietary video drivers. No memory errors were found and the proprietary video drivers made the display unusable so I had to uninstall them. Any thoughts?

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  • What amount of PHP memory usage is reasonable for multiple WordPress sites? [closed]

    - by John
    It seems like I've been plagued with memory usage issues most of the time I've been blogging (7 years). I upgraded my hosting to a HostGator VPS and still seem to have issues. I have about a dozen WP 3.4.2 sites running within a single account. Each has a separate installation. I finally installed TPC! Memory Usage within one of my WP installs to see what was going on. The memory usage just standing still is on the order of 40 MB. This seems high, but I don't know. What would be a reasonable memory usage for these WP installs? Do I need to take other things into account, or am I even looking at it the right way?

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  • Today's The 4:30 movie: Java vs. C++

    - by hinkmond
    Here's a slide show that's paraphrasing Cameron Purdy's presentation on how Java technology has and hasn't supplanted C++. See: Why Java Has/Hasn't Won vs. C++ Here's a quote: This eWEEK slide show borrows from Purdy’s arguments and looks at 10 reasons Java was able to supplant C++, as well as five reasons or areas it was not. It's like Godzilla vs. Mechagodzilla. Can there really be a clear winner? Well, stick around and watch Godzilla vs. Mechagodzilla II on tomorrow's The 4:30 movie as Monster Week continues on WABC, and find out... Hinkmond

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  • Designing Efficient SQL: A Visual Approach

    Sometimes, it is a great idea to push away the keyboard when tackling the problems of an ill-performing, complex, query, and take up pencil and paper instead. By drawing a diagram to show of all the tables involved, the joins, the volume of data involved, and the indexes, you'll see more easily the relative efficiency of the possible paths that your query could take through the tables.

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  • Already 3,333 tweets...

    Almost everything is about numbers, and this short blog entry includes the number of tweets written so far. ;) Quite frankly, I joined the Twitter bandwagon late... February 2010 or so. And within those 4.5 years I just came across an interesting milestone: 3,333 tweets 3,333 tweets since February 2010 Compared to some of my fellows here from Mauritius that's almost nothing... Anyways, Cheers and for the next 3,333 tweets. This time faster, hopefully.

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  • SQL Live Monitor

    - by TiborKaraszi
    I just found this one out there and wanted to share it. It connects to an instance and show you a bunch of figures. Nothing you can't extract yourself with SQL queries, but sometimes it is just nice to have one tool which is very easy to use. Here's what it looks like when connecting to an instance with no load on it: As you can see, there are some hyperlinked pages as well, and there are also some interesting options (like logging to CSV or for PAL analysis) under the "Option" button. One more thing...(read more)

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