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• Two Weeks To Go, Still Time to Register

  - by speakjava

  Yes, it's now only two weeks to the start of the 17th JavaOne conference! This will be my ninth JavaOne, I came fairly late to this event, attending for the first time in 2002.  Since then I've missed two conferences, 2006 for the birth of my son (a reasonable excuse I think) and 2010 for reasons we'll not go into here.  I have quite the collection of show devices, I've still got the WoWee robot, the HTC phone for JavaFX, the programmable pen and the Sharp Zaurus.  The only one I didn't keep was the homePod music player (I wonder why?) JavaOne is a special conference for many reasons, some of which I list here: A great opportunity to catch up on the latest changes in the Java world.  This is not just in terms of the platform, but as much about what people are doing with Java to build new and cool applications. A chance to meet people.  We have these things called BoFs, which stands for "Birds of a Feather", as in "Birds of a feather, flock together".  The idea being to have sessions where people who are interested in the same topic don't just get to listen to a presentation, but get to talk about it.  These sessions are great, but I find that JavaOne is as much about the people I meet in the corridors and the discussions I have there as it is about the sessions I get to attend. Think outside the box.  There are a lot of sessions at JavaOne covering the full gamut of Java technologies and applications.  Clearly going to sessions that relate to your area of interest is great, but attending some of the more esoteric sessions can often spark thoughts and stimulate the imagination to go off and do new and exciting things once you get back. Get the lowdown from the Java community.  Java is as much about community as anything else and there are plenty of events where you can get involved.  The GlassFish party is always popular and for Java Champions and JUG leaders there's a couple of special events too. Not just all hard work.  Oracle knows how to throw a party and the appreciation event will be a great opportunity to mingle with peers in a more relaxed environment.  This year Pearl Jam and Kings of Leon will be playing live.  Add free beer and what more could you want? So there you have it.  Just a few reasons for why you want to attend JavaOne this year.  Oh, and of course I'll be presenting three sessions which is even more reason to go.  As usual I've gone for some mainstream ("Custom Charts" for JavaFX) and some more 'out there' ("Java and the Raspberry Pi" and "Gestural Interfaces for JavaFX").  Once again I'll be providing plenty of demos so more than half my luggage this year will consist of a Kinect, robot arm, Raspberry Pis, gamepad and even an EEG sensor. If you're a student there's one even more attractive reason for going to JavaOne: It's Free! Registration is here.  Hope to see you there!

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• MVC Communication Pattern

  - by Kedu

  This is kind of a follow up question to this http://stackoverflow.com/questions/23743285/model-view-controller-and-callbacks, but I wanted to post it separately, because its kind of a different topic. I'm working on a multiplayer cardgame for the Android platform. I split the project into MVC which fits the needs pretty good, but I'm currently stuck because I can't figure out a good way to communicate between the different parts. I have everything setup and working with the controller being a big state machine, which is called over and over from the gameloop, and calls getter methods from the GUI and the android/network part to get the input. The input itself in the GUI and network is set by inputlisteners that set a local variable which I read in the getter method. So far so good, this is working. But my problem is, the controller has to check every input separately,so if I want to add an input I have to check in which states its valid and call the getter method from all these states. This is not good, and lets the code look pretty ugly, makes additions uncomfortable and adds redundance. So what I've got from the question I mentioned above is that some kind of command or event pattern will fit my needs. What I want to do is to create a shared and threadsafe queue in the controller and instead of calling all these getter methods, I just check the queue for new input and proceed it. On the other side, the GUI and network don't have all these getters, but instead create an event or command and send it to the controller through, for example, observer/observable. Now my problem: I can't figure out a way, for these commands/events to fit a common interface (which the queue can store) and still transport different kind of data (button clicks, cards that are played, the player id the command comes from, synchronization data etc.). If I design the communication as command pattern, I have to stick all the information that is needed to execute the command into it when its created, that's impossible because the GUI or network has no knowledge of all the things the controller needs to execute stuff that needs to be done when for example a card is played. I thought about getting this stuff into the command when executing it. But over all the different commands I have, I would need all the information the controller has, and thus give the command a reference to the controller which would make everything in it public, which is real bad design I guess. So, I could try some kind of event pattern. I have to transport data in the event. So, like the command, I would have an interface, which all events have in common, and can be stored in the shared queue. I could create a big enum with all the different events that a are possible, save one of these enums in the actual event, and build a big switch case for the events, to proceed different stuff for different events. The problem here: I have different data for all the events. But I need a common interface, to store the events in a queue. How do I get the specific data, if I can only access the event through the interface? Even if that wouldn't be a problem, I'm creating another big switch case, which looks ugly, and when i want to add a new event, I have to create the event itself, the case, the enum, and the method that's called with the data. I could of course check the event with the enum and cast it to its type, so I can call event type specific methods that give me the data I need, but that looks like bad design too.

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• What Counts For a DBA – Depth

  - by Louis Davidson

  SQL Server offers very simple interfaces to many of its features. Most people could open up SSMS, connect to a server, write a simple query and see the results. Even several of the core DBA tasks are deceptively straightforward. It doesn’t take a rocket scientist to perform a basic database backup or run a trace (even using the newfangled Extended Events!). However, appearances can be deceptive, and often times it is really important that a DBA understands not just the basics of how to perform a task, but why we do a task, and how that task works. As an analogy, consider a child walking into a darkened room. Most would know that they need to turn on the light, and how to do it, so they flick the switch. But what happens if light fails to shine forth. Most would immediately tell you that you need to consider changing the light bulb. So you hop in the car and take them to the local home store and instruct them to buy a replacement. Confronted with a 40 foot display of light bulbs, how will they decide which of the hundreds of types of bulbs, of different types, fittings, shapes, colors, power and efficiency ratings, is the right choice? Obviously the main lesson the child is going to learn this day is how to use their cell phone as a flashlight so they don’t have to ask for help the next time. Likewise, when the metaphorical toddlers who use your database server have issues, they will instinctively know something is wrong, and may even have some idea what caused it, but will have no depth of knowledge to figure out the right solution. That is where the DBA comes in and attempts to save the day. However, when one looks beneath the shiny UI, SQL Server has its own “40 foot display of light bulbs”, in the form of the tremendous number of tools and the often-bewildering amount of information they can present to the DBA, to help us find issues. Unfortunately, resorting to guesswork, to trying different “bulbs” over and over, hoping to stumble on the answer. This is where the right depth of knowledge goes a long way. If we need to write a SELECT statement, then knowing the syntax and where to find the data is not enough. Knowledge of indexes and query plans is essential. Without it, we might hit on a query that “works”, but we are basically still a user, not a programmer, because we have no real control over our platform. Is that level of knowledge deep enough? Probably not, since knowledge of the underlying metadata and structures would be very useful in helping us make sense of any query plan. Understanding the structure of an index makes the “key lookup” operator not sound like what you do when someone tapes your car key to the ceiling. So is even this level of understanding deep enough? Do we need to understand the memory architecture used to process the query? It might be a comforting level of knowledge, and will doubtless come in handy at some point, but is not strictly necessary in most cases. Beyond that lies (more or less) full knowledge of SQL language and the intricacies of every step the SQL Server engine takes to process our query. My personal theory is that, as a professional, our knowledge of a given task should extend, at a minimum, one level deeper than is strictly necessary to perform the task. Anything deeper can be left to the ridiculously smart, or obsessive, or both. As an example. tasked with storing an integer value between 0 and 99999999, it’s essential that I know that choosing an Integer over Decimal(8,0) will likely offer performance benefits. It is then useful that I also understand the value of adding a CHECK constraint, to make sure the values are valid to the desired range; and comforting that I know a little about the underlying processors, registers and computer math. Anything further, I leave to the likes of Joe Chang, whose recent blog post on the topic offers depth by the bucketful!  

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• Oracle Executive Strategy Brief: Enterprise-Grade Cloud Applications

  - by B Shashikumar

  Cloud Computing has clearly evolved into one of the dominant secular trends in the industry. Organizations are looking to the cloud to change how they buy and consume IT. And its no longer about just lower up-front costs. The cloud promises to deliver greater agility and free up resources to focus on innovation versus running and maintaining systems. But are organizations actually realizing these benefits? The full promise of cloud is not being realized by customers who entrust their business to multiple niche cloud providers. While almost 9 out of 10 companies  expect more IT agility with cloud, only 47% are actually getting it (Source: 2011 State of Cloud Survey by Symantec). These niche cloud customers have also seen the promises of lower costs, efficiency gains, improved security, and compliance go unfulfilled. Having one cloud provider for customer relationship management (CRM) and another for human capital management (HCM), and then trying to glue these proprietary systems together while integrating to a back-office financial system can add to complexity and long-term costs. Completing a business process or generating an integrated report is cumbersome, and leverages incomplete data. Why can’t niche cloud providers deliver on the full promise of cloud? It’s simple: you still need to complete business processes. You still need reporting that enables you to take action using data from multiple systems. You still have to comply with SOX and other industry regulations. These requirements don’t go away just because you deploy in the cloud. Delivering lower up-front costs by enabling customers to buy software as a service (SaaS) is the easy part. To get real value that lasts longer than your quarterly report, it’s important to realize the benefits of cloud without compromising on functionality and while having the right level of control and flexibility. This is the true promise of cloud. Oracle’s cloud strategy centers around delivering the benefits of cloud—without compromise. We uniquely empower our customers with complete solutions and choice. From the richest functionality to integrated reporting and great user experience. It’s all available in the cloud. And it works not just with other Oracle cloud applications, but with your existing Oracle and third-party systems as well. This helps protect your current investments and extend their value as you journey to the cloud. We’ve made the necessary investments not only in our applications but also in the underlying technology that makes it all run—from the platform down to the hardware and operating system. We make it all. And we’ve engineered it to work together and be highly optimized for our customers, in the cloud. With Oracle enterprise-grade cloud applications, you get the benefits of cloud plus more power, more choice, and more confidence. Read more about how you can realize the true advantage of Cloud with Oracle Enterprise-grade Cloud applications in the Oracle Executive Strategy Brief here.  You can also attend an Oracle Cloud Conference event at a city near you. Register here. 

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• Procedual level generation for a platformer game (tilebased) using player physics

  - by Notbad

  I have been searching for information about how to build a 2d world generator (tilebased) for a platformer game I am developing. The levels should look like dungeons with a ceiling and a floor and they will have a high probability of being just made of horizontal rooms but sometimes they can have exits to a top/down room. Here is an example of what I would like to achieve. I'm refering only to the caves part. I know level design won't be that great when generated but I think it is possible to have something good enough for people to enjoy the procedural maps (Note: Supermetrod Spoiler!): http://www.snesmaps.com/maps/SuperMetroid/SuperMetroidMapNorfair.html Well, after spending some time thinking about this I have some ideas to create the maps that I would like to share with you: 1) I have read about celular automatas and I would like to use them to carve the rooms but instead of carving just a tile at once I would like to carve full columns of tiles. Of course this carving system will have some restrictions like how many tiles must be left for the roof and the ceiling, etc... This way I could get much cleaner rooms than using the ussual automata. 2) I want some branching into the rooms. It will have little probability to happen but I definitely want it. Thinking about carving I came to the conclusion that I could be using some sort of path creation algorithm that the carving system would follow to create a path in the rooms. This could be more noticiable if we make the carving system to carve columns with the height of a corridor or with the height of a wide room (this will be added to the system as a param). This way at some point I could spawn a new automa beside the main one to create braches. This new automata should play side by side with the first one to create dead ends, islands (both paths created by the automatas meet at some point or lead to the same room. It would be too long to explain here all the tests I have done, etc... just will try to summarize the problems to see if anyone could bring some light to solve them (I don't mind sharing my successes but I think they aren't too relevant): 1) Zone reachability: How can I make sure that the player will be able to reach all zones I created (mainly when branches happen or vertical rooms are created). When branches are created I have to make sure that there will be a way to get onto the new created branch. I mean a bifurcation that the player could follow. Player will follow the main path or jump to a platform to get onto the other way). On the other hand if an island is created by the meeting of both branches I need to make sure the player will be able to get onto the island too. 2) When a branch is created and corridors are generated for each branch how can I make then both merge or repel to create an island or just make them separated corridors. 3) When I create a branch and an island is created becasue both corridors merge at somepoint or they lead to the same room, is there any way to detect this and randomize where to create the needed platforms to get onto the created isle? This platforms could be created at the start of the island or at the end. I guess part of the problem could be solved using some sort of graph following the created paths but I'm a bit lost in this sea of precedural content creation :). On the other hand I don't expect a solution to the problem but some information to get me moving forward again. Thanks in advance.

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• Why I switch from Asana.com

  - by Anirudha

  Originally posted on: http://geekswithblogs.net/anirugu/archive/2013/10/24/why-i-switch-from-asana.com.aspxI used Asana.com from 1-2 years. have nice experience to use it. it’s not so easy. When I started using it it’s make many confusion. Now I switch from it.   When I first time see I really didn’t understand how to make a private list. There is a icon on top click on it and make it private. After doing that I still not sure if this is working. There is a lot of confusion made that time. I discuss too much to figure out small small things. The UI is interesting but so hard to understand.  What I am looking for is just a list that I can hold private. I would like to share it only if I put them shared and put email address of person to hold them same list. Few days ago I see that My Win8 phone have a app that call Microsoft OneNote. The good thing of this MS app is that I can record my voice in the app. If someone want to make a list for future then he just need to say and this can be recorded.  This is awesome when you feel that Mobile keypad is just not so fast as a normal regular keyboard.   Google docs are another good option to handle this thing. Just make a word file and use it. share it with friend with many option. One best thing is this app have very simply UI then any other apps.   One more alternative is https://trello.com which you hear from joel on their blog http://www.joelonsoftware.com/items/2011/09/13.html There are many html5 and browser based, mobile based app. Many of them support multi platform feature. this means you can have them from PC to your Pocket. One good thing we all wanted is offline. if you are not online thing will be saved and push back to server when you will be online.   The biggest problem with some apps are they are attractive easy but hard to learn. Their one feature are not clearly defined what he does. This make frustration and confusion to user. When app are not simple to use people start stop trying to learn it. That’s all the problem I have with asana.com If you don’t want to try anything then what about Sticky Notes that is part of Windows 7. This app are still usable since you can store the text on it. If you know any good app to make a task list that provide access from tablet/mobile then put comment here. In the whole world of app there is a lot of app for doing this same thing differently. I mention few of them here. I hope this is nice to describe it.   Thanks for read my post.

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• Is Visual Source Safe (The latest Version) really that bad? Why? What's the Best Alternative? Why? [closed]

  - by hanzolo

  Over the years I've constantly heard horror stories, had people say "Real Programmers Dont Use VSS", and so on. BUT, then in the workplace I've worked at two companies, one, a very well known public facing high traffic website, and another high end Financial Services "Web-Based" hosted solution catering to some very large, very well known companies, which is where I currently Reside and everything's working just fine (KNOCK KNOCK!!). I'm constantly interfacing with EXTREMELY Old technology with some of these financial institutions.. OLD LIKE YOU WOULDN'T BELIEVE.. which leads me to the conclusion that if it works "LEAVE IT", and that maybe there's some value in old technology? at least enough value to overrule a rewrite!? right?? Is there something fundamentally flawed with the underlying technology that VSS uses? I have a feeling that if i said "someone said VSS Sucks" they would beg to differ, most likely give me this look like i dont know -ish, and I'd never gain back their respect and my credibility (well, that'll be hard to blow.. lol), BUT, give me an argument that I can take to someone whose been coding for 30 years, that builds Platforms that leverage current technology (.NET 3.5 / SQL 2008 R2 ), write's their own ORM with scaffolding and is able to provide a quality platform that supports thousands of concurrent users on a multi-tenant hosted solution, and does not agree with any benefits from having Source Control Integrated, and yet uses the Infamous Visual Source Safe. I have extensive experience with TFS up to 2010, and honestly I think it's great when a team (beyond developers) can embrace it. I've worked side by side with someone whose a die hard SVN'r and from a purist standpoint, I see the beauty in it (I need a bit more, out of my SS, but it surely suffices). So, why are such smarties not running away from Visual Source Safe? surely if it was so bad, it would've have been realized by now, and I would not be sitting here with this simple old, Check In, Check Out, Version Resistant, Label Intensive system. But here I am... I would love to drop an argument that would be the end all argument, but if it's a matter of opinion and personal experience, there seems to be too much leeway for keeping VSS. UPDATE: I guess the best case is to have the VSS supporters check other people's experiences and draw from that until we (please no) experience the breaking factor ourselves. Until then, i wont be engaging in a discussion to migrate off of VSS.. UPDATE 11-2012: So i was able to convince everyone at my work place that since MS is sun downing Visual Source Safe it might be time to migrate over to TFS. I was able to convince them and have recently upgraded our team to Visual Studio 2012 and TFS 2012. The migration was fairly painless, had to run analyze.exe which found a bunch of errors (not sure they'll ever affect the project) and then manually run the VSSConverter.exe. Again, painless, except it took 16 hours to migrate 5 years worth of everything.. and now we're on TFS.. much more integrated.. much more cooler.. so all in all, VSS served it's purpose for years without hick-up. There were no horror stories and Visual Source Save as source control worked just fine. so to all the nay sayers (me included). there's nothing wrong with using VSS. i wouldnt start a new project with it, and i would definitely consider migrating to TFS. (it's really not super difficult and a new "wizard" type converter is due out any day now so migrating should be painless). But from my experience, it worked just fine and got the job done.

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• Pinterest and the Rising Power of Imagery

  - by Mike Stiles

  If images keep you glued to a screen, you’re hardly alone. Countless social users are letting their eyes do the walking, waiting for that special photo to grab their attention. And perhaps more than any other social network, Pinterest has been giving those eyes plenty of room to walk. Pinterest came along in 2010. Its play was that users could simply create topic boards and pin pictures to the appropriate boards for sharing. Yes there are some words, captions mostly, but not many. The speed of its growth raised eyebrows. Traffic quadrupled in the last quarter of 2011, with 7.51 million unique visitors in December alone. It now gets 1.9 billion monthly page views. And it was sticky. In the US, the average time a user spends strolling through boards and photos on Pinterest is 15 minutes, 50 seconds. Proving the concept of browsing a catalogue is not dead, it became a top 5 referrer for several apparel retailers like Land’s End, Nordstrom, and Bergdorfs. Now a survey of online shoppers by BizRate Insights says that Pinterest is responsible for more purchases online than Facebook. Over 70% of its users are going there specifically to keep up with trends and get shopping ideas. And when they buy, the average order value is $179. Pinterest is also scoring better in terms of user engagement. 66% of pinners regularly follow and repin retailers, whereas 17% of Facebook fans turn to that platform for purchase ideas. (Facebook still wins when it comes to reach and driving traffic to 3rd-party sites by the way). Social posting best practices have consistently shown that posts with photos are rewarded with higher engagement levels. You may be downright Shakespearean in your writing, but what makes images in the digital world so much more powerful than prose? 1. They transcend language barriers. 2. They’re fun and addictive to look at. 3. They can be consumed in fractions of a second, important considering how fast users move through their social content (admit it, you do too). 4. They’re efficient gateways. A good picture might get them to the headline. A good headline might then get them to the written content. 5. The audience for them surpasses demographic limitations. 6. They can effectively communicate and trigger an emotion. 7. With mobile use soaring, photos are created on those devices and easily consumed and shared on them. Pinterest’s iPad app hit #1 in the Apple store in 1 day. Even as far back as 2009, over 2.5 billion devices with cameras were on the streets generating in just 1 year, 10% of the number of photos taken…ever. But let’s say you’re not a retailer. What if you’re a B2B whose products or services aren’t visual? Should you worry about your presence on Pinterest? As with all things, you need a keen awareness of who your audience is, where they reside online, and what they want to do there. If it doesn’t make sense to put a tent stake in Pinterest, fine. But ignore the power of pictures at your own peril. If not visually, how are you going to attention-grab social users scrolling down their News Feeds at top speed? You’re competing with every other cool image out there from countless content sources. Bore us and we’ll fly right past you.

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• Cloud Adoption Challenges

  - by Herve Roggero

  Originally posted on: http://geekswithblogs.net/hroggero/archive/2013/11/07/cloud-adoption-challenges.aspxWhile cloud computing makes sense for most organizations and countless projects, I have seen customers significantly struggle with cloud adoption challenges. This blog post is not an attempt to provide a generic assessment of cloud adoption; rather it is an account of personal experiences in the field, some of which may or may not apply to your organization. Cloud First, Burst? In the rush to cloud adoption some companies have made the decision to redesign their core system with a cloud first approach. However a cloud first approach means that the system may not work anymore on-premises after it has been redesigned, specifically if the system depends on Platform as a Service (PaaS) components (such as Azure Tables). While PaaS makes sense when your company is in a position to adopt the cloud exclusively, it can be difficult to leverage with systems that need to work in different clouds or on-premises. As a result, some companies are starting to rethink their cloud strategy by designing for on-premises first, and modify only the necessary components to burst when needed in the cloud. This generally means that the components need to work equally well in any environment, which requires leveraging Infrastructure as a Service (IaaS) or additional investments for PaaS applications, or both.  What’s the Problem? Although most companies can benefit from cloud computing, not all of them can clearly identify a business reason for doing so other than in very generic terms. I heard many companies claim “it’s cheaper”, or “it allows us to scale”, without any specific metric or clear strategy behind the adoption decision. Other companies have a very clear strategy behind cloud adoption and can precisely articulate business benefits, such as “we have a 500% increase in traffic twice a year, so we need to burst in the cloud to avoid doubling our network and server capacity”. Understanding the problem being solved through by adopting cloud computing can significantly help organizations determine the optimum path and timeline to adoption. Performance or Scalability? I stopped counting the number of times I heard “the cloud doesn’t scale; our database runs faster on a laptop”.  While performance and scalability are related concepts, they are nonetheless different in nature. Performance is a measure of response time under a given load (meaning with a specific number of users), while scalability is the performance curve over various loads. For example one system could see great performance with 100 users, but timeout with 1,000 users, in which case the system wouldn’t scale. However another system could have average performance with 100 users, but display the exact same performance with 1,000,000 users, in which case the system would scale. Understanding that cloud computing does not usually provide high performance, but instead provides the tools necessary to build a scalable system (usually using PaaS services such as queuing and data federation), is fundamental to proper cloud adoption. Uptime? Last but not least, you may want to read the Service Level Agreement of your cloud provider in detail if you haven’t done so. If you are expecting 99.99% uptime annually you may be in for a surprise. Depending on the component being used, there may be no associated SLA at all! Other components may be restarted at any time, or services may experience failover conditions weekly ( or more) based on current overall conditions of the cloud service provider, most of which are outside of your control. As a result, for PaaS cloud environments (and to a certain extent some IaaS systems), applications need to assume failure and gracefully retry to be successful in the cloud in order to provide service continuity to end users. About Herve Roggero Herve Roggero, Windows Azure MVP, is the founder of Blue Syntax Consulting (http://www.bluesyntax.net). Herve's experience includes software development, architecture, database administration and senior management with both global corporations and startup companies. Herve holds multiple certifications, including an MCDBA, MCSE, MCSD. He also holds a Master's degree in Business Administration from Indiana University. Herve is the co-author of "PRO SQL Azure" and “PRO SQL Server 2012 Practices” from Apress, a PluralSight author, and runs the Azure Florida Association.

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• Faster Memory Allocation Using vmtasks

  - by Steve Sistare

  You may have noticed a new system process called "vmtasks" on Solaris 11 systems: % pgrep vmtasks 8 % prstat -p 8 PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP 8 root 0K 0K sleep 99 -20 9:10:59 0.0% vmtasks/32 What is vmtasks, and why should you care? In a nutshell, vmtasks accelerates creation, locking, and destruction of pages in shared memory segments. This is particularly helpful for locked memory, as creating a page of physical memory is much more expensive than creating a page of virtual memory. For example, an ISM segment (shmflag & SHM_SHARE_MMU) is locked in memory on the first shmat() call, and a DISM segment (shmflg & SHM_PAGEABLE) is locked using mlock() or memcntl(). Segment operations such as creation and locking are typically single threaded, performed by the thread making the system call. In many applications, the size of a shared memory segment is a large fraction of total physical memory, and the single-threaded initialization is a scalability bottleneck which increases application startup time. To break the bottleneck, we apply parallel processing, harnessing the power of the additional CPUs that are always present on modern platforms. For sufficiently large segments, as many of 16 threads of vmtasks are employed to assist an application thread during creation, locking, and destruction operations. The segment is implicitly divided at page boundaries, and each thread is given a chunk of pages to process. The per-page processing time can vary, so for dynamic load balancing, the number of chunks is greater than the number of threads, and threads grab chunks dynamically as they finish their work. Because the threads modify a single application address space in compressed time interval, contention on locks protecting VM data structures locks was a problem, and we had to re-scale a number of VM locks to get good parallel efficiency. The vmtasks process has 1 thread per CPU and may accelerate multiple segment operations simultaneously, but each operation gets at most 16 helper threads to avoid monopolizing CPU resources. We may reconsider this limit in the future. Acceleration using vmtasks is enabled out of the box, with no tuning required, and works for all Solaris platform architectures (SPARC sun4u, SPARC sun4v, x86). The following tables show the time to create + lock + destroy a large segment, normalized as milliseconds per gigabyte, before and after the introduction of vmtasks: ISM system ncpu before after speedup ------ ---- ------ ----- ------- x4600 32 1386 245 6X X7560 64 1016 153 7X M9000 512 1196 206 6X T5240 128 2506 234 11X T4-2 128 1197 107 11x DISM system ncpu before after speedup ------ ---- ------ ----- ------- x4600 32 1582 265 6X X7560 64 1116 158 7X M9000 512 1165 152 8X T5240 128 2796 198 14X (I am missing the data for T4 DISM, for no good reason; it works fine). The following table separates the creation and destruction times: ISM, T4-2 before after ------ ----- create 702 64 destroy 495 43 To put this in perspective, consider creating a 512 GB ISM segment on T4-2. Creating the segment would take 6 minutes with the old code, and only 33 seconds with the new. If this is your Oracle SGA, you save over 5 minutes when starting the database, and you also save when shutting it down prior to a restart. Those minutes go directly to your bottom line for service availability.

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• Editing files without race conditions?

  - by user2569445

  I have a CSV file that needs to be edited by multiple processes at the same time. My question is, how can I do this without introducing race conditions? It's easy to write to the end of the file without race conditions by open(2)ing it in "a" (O_APPEND) mode and simply write to it. Things get more difficult when removing lines from the file. The easiest solution is to read the file into memory, make changes to it, and overwrite it back to the file. If another process writes to it after it is in memory, however, that new data will be lost upon overwriting. To further complicate matters, my platform does not support POSIX record locks, checking for file existence is a race condition waiting to happen, rename(2) replaces the destination file if it exists instead of failing, and editing files in-place leaves empty bytes in it unless the remaining bytes are shifted towards the beginning of the file. My idea for removing a line is this (in pseudocode): filename = "/home/user/somefile"; file = open(filename, "r"); tmp = open(filename+".tmp", "ax") || die("could not create tmp file"); //"a" is O_APPEND, "x" is O_EXCL|O_CREAT while(write(tmp, read(file)); //copy the $file to $file+".new" close(file); //edit tmp file unlink(filename) || die("could not unlink file"); file = open(filename, "wx") || die("another process must have written to the file after we copied it."); //"w" is overwrite, "x" is force file creation while(write(file, read(tmp))); //copy ".tmp" back to the original file unlink(filename+".tmp") || die("could not unlink tmp file"); Or would I be better off with a simple lock file? Appender process: lock = open(filename+".lock", "wx") || die("could not lock file"); file = open(filename, "a"); write(file, "stuff"); close(file); close(lock); unlink(filename+".lock"); Editor process: lock = open(filename+".lock", "wx") || die("could not lock file"); file = open(filename, "rw"); while(contents += read(file)); //edit "contents" write(file, contents); close(file); close(lock); unlink(filename+".lock"); Both of these rely on an additional file that will be left over if a process terminates before unlinking it, causing other processes to refuse to write to the original file. In my opinion, these problems are brought on by the fact that the OS allows multiple writable file descriptors to be opened on the same file at the same time, instead of failing if a writable file descriptor is already open. It seems that O_CREAT|O_EXCL is the closest thing to a real solution for preventing filesystem race conditions, aside from POSIX record locks. Another possible solution is to separate the file into multiple files and directories, so that more granular control can be gained over components (lines, fields) of the file using O_CREAT|O_EXCL. For example, "file/$id/$field" would contain the value of column $field of the line $id. It wouldn't be a CSV file anymore, but it might just work. Yes, I know I should be using a database for this as databases are built to handle these types of problems, but the program is relatively simple and I was hoping to avoid the overhead. So, would any of these patterns work? Is there a better way? Any insight into these kinds of problems would be appreciated.

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• Android Game Development. Async Task. Loading Bitmap Images Sounds

  - by user2534694

  Im working on this game for android. And wanted to know if my thread architecture was right or wrong. Basically, what is happening is, i am loading All the bitmaps,sounds etc in the initializevariables() method. But sometimes the game crashes and sometimes it doesnt. So i decided to use async task. But that doesnt seem to work either (i too loads at times and crashes at times) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setFullScreen(); initializeVariables(); new initVariables().execute(); // setContentView(ourV); } private void setFullScreen() { requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); getWindow().setFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON, WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON ); } private void initializeVariables() { ourV=new OurView(this); stats = getSharedPreferences(filename, 0); ballPic = BitmapFactory.decodeResource(getResources(), R.drawable.ball5); platform = BitmapFactory.decodeResource(getResources(), R.drawable.platform3); gameB = BitmapFactory.decodeResource(getResources(), R.drawable.game_back2); waves = BitmapFactory.decodeResource(getResources(), R.drawable.waves); play = BitmapFactory.decodeResource(getResources(), R.drawable.play_icon); pause = BitmapFactory.decodeResource(getResources(), R.drawable.pause_icon); platform2 = BitmapFactory.decodeResource(getResources(), R.drawable.platform4); countdown = BitmapFactory.decodeResource(getResources(), R.drawable.countdown); bubbles = BitmapFactory.decodeResource(getResources(), R.drawable.waves_bubbles); backgroundMusic = MediaPlayer.create(this, R.raw.music); jump = MediaPlayer.create(this, R.raw.jump); click = MediaPlayer.create(this, R.raw.jump_crack); sm = (SensorManager) getSystemService(SENSOR_SERVICE); acc = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); sm.registerListener(this, acc, SensorManager.SENSOR_DELAY_GAME); ourV.setOnTouchListener(this); dialog = new Dialog(this,android.R.style.Theme_Translucent_NoTitleBar_Fullscreen); dialog.setContentView(R.layout.pausescreen); dialog.hide(); dialog.setOnDismissListener(this); resume = (Button) dialog.findViewById(R.id.bContinue); menu = (Button) dialog.findViewById(R.id.bMainMenu); newTry = (Button) dialog.findViewById(R.id.bNewTry); tv_time = (TextView) dialog.findViewById(R.id.tv_time); tv_day = (TextView) dialog.findViewById(R.id.tv_day); tv_date = (TextView) dialog.findViewById(R.id.tv_date); resume.setOnClickListener(this); menu.setOnClickListener(this); newTry.setOnClickListener(this); } @Override protected void onResume() { //if its running the first time it goes in the brackets if(firstStart) { ourV.onResume(); firstStart=false; } } Now what onResume in ourV does is , its responsible for starting the thread //this is ourV.onResume public void onResume() { t=new Thread(this); isRunning=true; t.start(); } Now what I want is to initialise all bitmaps sounds etc in the async background method public class initVariables extends AsyncTask<Void, Integer, Void> { ProgressDialog pd; @Override protected void onPreExecute() { pd = new ProgressDialog(GameActivity.this); pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); pd.setMax(100); pd.show(); } @Override protected Void doInBackground(Void... arg0) { synchronized (this) { for(int i=0;i<20;i++) { publishProgress(5); try { Thread.sleep(89); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } return null; } @Override protected void onProgressUpdate(Integer... values) { pd.incrementProgressBy(values[0]); } @Override protected void onPostExecute(Void result) { pd.dismiss(); setContentView(ourV); } } Now since I am new to this. You could tellme maybe if async is not required for such stuff and there is another way of doing it normally.

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• Cloud Fact for Business Managers #3: Where You Data Is, and Who Has Access to It Might Surprise You

  - by yaldahhakim

  Written by: David Krauss While data security and operational risk conversations usually happen around the desk of a CCO/CSO (chief compliance and/or security officer), or perhaps the CFO, since business managers are now selecting cloud providers, they need to be able to at least ask some high-level questions on the topic of risk and compliance.  While the report found that 76% of adopters were motivated to adopt cloud apps because of quick access to software, most of these managers found that after they made a purchase decision their access to exciting new capabilities in the cloud could be hindered due to performance and scalability constraints put forth  by their cloud provider.  If you are going to let your business consume their mission critical business applications as a service, then it’s important to understand who is providing those cloud services and what kind of performance you are going to get.  Different types of departments, companies and industries will all have unique requirements so it’s key to take this also into consideration.   Nothing puts a CEO in a bad mood like a public data breach or finding out the company lost money when customers couldn’t buy a product or service because your cloud service provider had a problem.  With 42% of business managers having seen a data security breach in their department associated directly with the use of cloud applications, this is happening more than you think.   We’ve talked about the importance of being able to avoid information silos through a unified cloud approach and platform.  This is also important when keeping your data safe and secure, and a key conversation to have with your cloud provider.  Your customers want to know that their information is protected when they do business with you, just like you want your own company information protected.   This is really hard to do when each line of business is running different cloud application services managed by different cloud providers, all with different processes and controls.   It only adds to the complexity, and the more complex, the more risky and the chance that something will go wrong. What about compliance? Depending on the cloud provider, it can be difficult at best to understand who has access to your data, and were your data is actually stored.  Add to this multiple cloud providers spanning multiple departments and it becomes very problematic when trying to comply with certain industry and country data security regulations.  With 73% of business managers complaining that having cloud data handled externally by one or more cloud vendors makes it hard for their department to be compliant, this is a big time suck for executives and it puts the organization at risk. Is There A Complete, Integrated, Modern Cloud Out there for Business Executives?If you are a business manager looking to drive faster innovation for your business and want a cloud application that your CIO would approve of, I would encourage you take a look at Oracle Cloud.  It’s everything you want from a SaaS based application, but without compromising on functionality and other modern capabilities like embedded business intelligence, social relationship management (for your entire business), and advanced mobile.  And because Oracle Cloud is built and managed by Oracle, you can be confident that your cloud application services are enterprise-grade.  Over 25 Million users and 10 thousands companies around the globe rely on Oracle Cloud application services everyday – maybe your business should too.  For more information, visit cloud.oracle.com. Additional Resources •    Try it: cloud.oracle.com•    Learn more: http://www.oracle.com/us/corporate/features/complete-cloud/index.html•    Research Report: Cloud for Business Managers: The Good, the Bad, and the Ugly

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• Delegates: A Practical Understanding

  - by samerpaul

  It's been a while since I have written on this blog, and I'm planning on reviving it this summer, since I have more time to do so again.I've also recently started working on the iPhone platform, so I haven't been as busy in .NET as before.In either case, today's blog post applies to both C# and Objective-C, because it's more about a practical understanding of delegates than it is about code. When I was learning coding, I felt like delegates was one of the hardest things to conceptually understand, and a lot of books don't really do a good job (in my opinion) of explaining it. So here's my stab at it.A Real Life Example of DelegatesLet's say there are three of you. You, your friend, and your brother. You're each in a different room in your house so you can't hear each other, even if you shout. 1)You are playing a computer game2) Friend is building a puzzle3) Brother is nappingNow, you three are going to stay in your room but you want to be informed if anything interesting is happening to the one of you. Let's say you (playing the computer game) want to know when your brother wakes up.You could keep walking to the room, checking to see if he's napping, and then walking back to your room. But that would waste a lot of time / resources, and what if you miss when he's awake before he goes back to sleep? That would be bad.Instead, you hand him a 2-way radio that works between your room and his room. And you inform him that when he wakes up, he should press a button on the radio and say "I'm awake". You are going to be listening to that radio, waiting for him to say he's awake. This, in essence, is how a delegate works.You're creating an "object" (the radio) that allows you to listen in on an event you specify. You don't want him to send any other messages to you right now, except when he wakes up. And you want to know immediately when he does, so you can go over to his room and say hi. (the methods that are called when a delegate event fires). You're also currently specifying that only you are listening on his radio.Let's say you want your friend to come into the room at the same time as you, and do something else entirely, like fluff your brother's pillow. You will then give him an identical radio, that also hooks into your brother's radio, and inform him to wait and listen for the "i'm awake" signal.Then, when your brother wakes up, he says "I'm awake!" and both you and your friend walk into the room. You say hi, and your friend fluffs the pillow, then you both exit.Later, if you decide you don't care to say hi anymore, you turn off your radio. Now, you have no idea when your brother is awake or not, because you aren't listening anymore.So again, you are each classes in this example, and each of you have your own methods. You're playing a computer game (PlayComputerGame()), your friend is building a puzzle (BuildPuzzle()) and your brother is napping (Napping()). You create a delegate (ImAwake) that you set your brother to do, when he wakes up. You listen in on that delegate (giving yourself a radio and turning it on), and when you receive the message, you fire a new method called SayHi()). Your friend is also wired up to the same delegate (using an identical radio) and fires the method FluffPillow().Hopefully this makes sense, and helps shed some light on how delegates operate. Let me know! Feel free to drop me a line at Twitter (preferred method of contact) here: samerabousalbi

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• Simple Navigation In Windows Phone 7

  - by PeterTweed

  Take the Slalom Challenge at www.slalomchallenge.com! When moving to the mobile platform all applications need to be able to provide different views.  Navigating around views in Windows Phone 7 is a very easy thing to do.  This post will introduce you to the simplest technique for navigation in Windows Phone 7 apps. Steps: 1.     Create a new Windows Phone Application project. 2.     In the MainPage.xaml file copy the following xaml into the ContentGrid Grid:             <StackPanel Orientation="Vertical" VerticalAlignment="Center"  >                 <TextBox Name="ValueTextBox" Width="200" ></TextBox>                 <Button Width="200" Height="30" Content="Next Page" Click="Button_Click"></Button>             </StackPanel> This gives a text box for the user to enter text and a button to navigate to the next page. 3.     Copy the following event handler code to the MainPage.xaml.cs file:         private void Button_Click(object sender, RoutedEventArgs e)         {             NavigationService.Navigate(new Uri( string.Format("/SecondPage.xaml?val={0}", ValueTextBox.Text), UriKind.Relative));         }   The event handler uses the NavigationService.Navigate() function.  This is what makes the navigation to another page happen.  The function takes a Uri parameter with the name of the page to navigate to and the indication that it is a relative Uri to the current page.  Note also the querystring is formatted with the value entered in the ValueTextBox control – in a similar manner to a standard web querystring. 4.     Add a new Windows Phone Portrait Page to the project named SecondPage.xaml. 5.     Paste the following XAML in the ContentGrid Grid in SecondPage.xaml:             <Button Name="GoBackButton" Width="200" Height="30" Content="Go Back" Click="Button_Click"></Button>   This provides a button to navigate back to the first page. 6.     Copy the following event handler code to the SecondPage.xaml.cs file:         private void Button_Click(object sender, RoutedEventArgs e)         {             NavigationService.GoBack();         } This tells the application to go back to the previously displayed page. 7.     Add the following code to the constructor in SecondPage.xaml.cs:             this.Loaded += new RoutedEventHandler(SecondPage_Loaded); 8.     Add the following loaded event handler to the SecondPage.xaml.cs file:         void SecondPage_Loaded(object sender, RoutedEventArgs e)         {             if (NavigationContext.QueryString["val"].Length > 0)                 MessageBox.Show(NavigationContext.QueryString["val"], "Data Passed", MessageBoxButton.OK);             else                 MessageBox.Show("{Empty}!", "Data Passed", MessageBoxButton.OK);         }   This code pops up a message box displaying either the text entered on the first page or the message “{Empty}!” if no text was entered. 9.     Run the application, enter some text in the text box and click on the next page button to see the application in action:   Congratulations!  You have created a new Windows Phone 7 application with page navigation.

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• Don’t string together XML

  - by KyleBurns

  XML has been a pervasive tool in software development for over a decade.  It provides a way to communicate data in a manner that is simple to understand and free of platform dependencies.  Also pervasive in software development is what I consider to be the anti-pattern of using string manipulation to create XML.  This usually starts with a “quick and dirty” approach because you need an XML document and looks like (for all of the examples here, we’ll assume we’re writing the body of a method intended to take a Contact object and return an XML string): return string.Format("<Contact><BusinessName>{0}</BusinessName></Contact>", contact.BusinessName);   In the code example, I created (or at least believe I created) an XML document representing a simple contact object in one line of code with very little overhead.  Work’s done, right?  No it’s not.  You see, what I didn’t realize was that this code would be used in the real world instead of my fantasy world where I own all the data and can prevent any of it containing problematic values.  If I use this code to create a contact record for the business “Sanford & Son”, any XML parser will be incapable of processing the data because the ampersand is special in XML and should have been encoded as &amp;. Following the pattern that I have seen many times over, my next step as a developer is going to be to do what any developer in his right mind would do – instruct the user that ampersands are “bad” and they cannot be used without breaking computers.  This may work in many cases and is often accompanied by logic at the UI layer of applications to block these “bad” characters, but sooner or later someone is going to figure out that other applications allow for them and will want the same.  This often leads to the creation of “cleaner” functions that perform a replace on the strings for every special character that the person writing the function can think of.  The cleaner function will usually grow over time as support requests reveal characters that were missed in the initial cut.  Sooner or later you end up writing your own somewhat functional XML engine. I have never been told by anyone paying me to write code that they would like to buy a somewhat functional XML engine.  My employer/customer’s needs have always been for something that may use XML, but ultimately is functionality that drives business value. I’m not going to build an XML engine. So how can I generate XML that is always well-formed without writing my own engine?  Easy – use one of the ones provided to you for free!  If you’re in a shop that still supports VB6 applications, you can use the DomDocument or MXXMLWriter object (of the two I prefer MXXMLWriter, but I’m not going to fully describe either here).  For .Net Framework applications prior to the 3.5 framework, the code is a little more verbose than I would like, but easy once you understand what pieces are required:             using (StringWriter sw = new StringWriter())             {                 using (XmlTextWriter writer = new XmlTextWriter(sw))                 {                     writer.WriteStartDocument();                     writer.WriteStartElement("Contact");                     writer.WriteElementString("BusinessName", contact.BusinessName);                     writer.WriteEndElement(); // end Contact element                     writer.WriteEndDocument();                     writer.Flush();                     return sw.ToString();                 }             }   Looking at that code, it’s easy to understand why people are drawn to the initial one-liner.  Lucky for us, the 3.5 .Net Framework added the System.Xml.Linq.XElement object.  This object takes away a lot of the complexity present in the XmlTextWriter approach and allows us to generate the document as follows: return new XElement("Contact", new XElement("BusinessName", contact.BusinessName)).ToString();   While it is very common for people to use string manipulation to create XML, I’ve discussed here reasons not to use this method and introduced powerful APIs that are built into the .Net Framework as an alternative.  I’ve given a very simplistic example here to highlight the most basic XML generation task.  For more information on the XmlTextWriter and XElement APIs, check out the MSDN library.

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• Understanding the Value of SOA

  - by Mala Narasimharajan

  Written By: Debra Lilley, ACE Director, Fusion Applications Again I want to talk from my area of expertise of Fusion Applications and talk about their design fundamentals. If you look at the table below and start at the bottom Oracle have defined all of the business objects e.g. accounts, people, customers, invoices etc. used by Fusion Applications; each of these objects contain all of the information required and can be expanded if necessary.  That Oracle have created for each of these business objects every action that is needed for the applications e.g. all the actions to create a new customer, checking to see if it exists, credit checking with D&B (Dun & Bradstreet < http://www.dnb.co.uk/> ) , creating the record, notifying those required etc. Each of these actions is a stand-alone web service. Again you can create a new actions or subscribe to an external provided web service e.g. the D&B check. The diagram also shows that all of development of Fusion Applications is from their Fusion Middleware offerings. Then the Intelligent Business Process is the order in which you run these actions, this is Service Orientated Architecture, SOA. Not only is SOA used to orchestrate actions within Fusion Applications it is also used in the integration of Fusion Applications with the rest of the Oracle stable of applications such as EBS, PeopleSoft, JDE and Siebel. The other applications are written with propriety development tools so how do they work with SOA? It’s a very simple answer, with the introduction of the Oracle SOA platform each process within these applications was made available to be called as a web service. I won’t go into technically how that is done but what’s known as a wrapper to allow each of them to act in this way was added. Finally at the top of the diagram are the questions that each Fusion Application process must answer, and this is the ‘special’ sauce that makes them so good, the User Experience, but that is a topic for another day, or you can read about it in my blog http://debrasoracle.blogspot.co.uk/2014/04/going-on-record-about-fusion-apps-cloud.html or Oracle’s own UX blog https://blogs.oracle.com/usableapps/ The concept behind AppAdvantage is not new the idea that Oracle technology can add value to your Oracle applications investments is pretty fundamental. Nishit Rao who is in AppAdvantage team provided myself and other ACE Directors with demo kits so that we could demonstrate SOA running with the applications. The example I learnt to build was that of the EBS inventory open interface. The simple concept is that request records can be added to a table and an import run that creates these as transactions in inventory. What’s SOA allows you to do is to add to the table from any source and then run this process automatically whereas traditionally you had to run the process at regular intervals because you didn’t know if the table was empty or not. This may just sound like a different way of doing the same thing but if the process is critical for your business then the interval was very small and the process run potentially many times unnecessarily. Using SOA it only happened when necessary without any delay. So in my post today I’ve talked about how SOA is used with Fusion Applications and in the linking with more traditional applications but that is only the tip of the iceberg of potential, your applications are just part of your IT systems and SOA can orchestrate your data across all of them; the beauty of open standards.  Debra Lilley, Fusion Champion, UKOUG Board Member, Fusion User Experience Advocate and ACE Director.  Lilley has 18 years experience with Oracle Applications, with E Business Suite since 9.4.1, moving to Business Intelligence Team Lead and Oracle Alliance Director. She has spoken at over 100 conferences worldwide and posts at debrasoraclethoughts

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• Using 3rd Party JavaScript Plugins Hardwired With &lsquo;document.write&rsquo;

  - by ToStringTheory

  Introduction Have you ever had the need to implement a 3rd party JavaScript plugin, but your needs didn’t fit the model and usage defined by the API or documentation of the plugin?  Recently I ran into this issue when I was trying to implement a web snapshot plugin into our site.  To use their plugin, you had to include a script tag to the plugin on their server with an API key.  The second part of the usage was to include a <script> tag around a function call wherever you wanted a snapshot to appear. The Problem When trying to use the service, the images did not display.  I checked a couple of things and didn’t find anything wrong at first..  It wasn’t until I looked at the function that was called by the inline script did I find the issue – a call to the webservice, followed by a call to ‘document.write’ in its callback.  The solution in which I was trying to implement the plugin happened to be in response to an AJAX call after the document had completely loaded.  After the page has loaded, document.write does nothing. My first thought for a solution was to just cache the script from the service, and edit it do something like a return function or callback that I could use to edit the document from.  However, I quickly discovered that there is no way to cache the script from the service, as it had a hash in the function where it would call the server.  The hash was updated every few seconds/minutes, expiring old hashes.  This meant that I wouldn’t be able to edit the script and upload a new version to my server, as the script would not work after a few minutes from originally getting the script from the service. Solution The solution eluded me until I realized that this was JavaScript I was dealing with.  A language designed so that you could do just about anything to any library, function, or object…  At this point, the solution was simple – take control of the document.write function.  Using a buffer variable, and a simple function call, it is eerily simple to perform: //what would have been output to the document var buffer = ""; //store a reference to the real document.write var dw = document.write; //redefine document.write to store to our buffer document.write = function (str) {buffer += str;} //execute the function containing calls to document.write eval('{function encapsulated in <script></script> tags}'); //restore the original document.write function (just in case) document.write = dw; That’s it.  Instead of using the script tags where I wanted to include a snapshot, I called a function passing in the URL to the page I wanted a snapshot of.  After that last line of code, what would have been output to the document (or not in the case of the ajax call) was instead stored in buffer. Conclusion While the solution itself is simple, coming from a background much more footed in the .Net platform, I believe that this is a prime example of always keeping the language that you are working in in mind.  While this may seem obvious at first, as I KNEW I was in JavaScript, I never thought of taking control of the document.write function because I am more accustomed to the .Net world.  I can’t simply replace the functionality of Console.WriteLine.

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• Is there any kind of established architecture for browser based games?

  - by black_puppydog

  I am beginning the development of a broser based game in which players take certain actions at any point in time. Big parts of gameplay will be happening in real life and just have to be entered into the system. I believe a good kind of comparison might be a platform for managing fantasy football, although I have virtually no experience playing that, so please correct me if I am mistaken here. The point is that some events happen in the program (i.e. on the server, out of reach for the players) like pulling new results from some datasource, starting of a new round by a game master and such. Other events happen in real life (two players closing a deal on the transfer of some team member or whatnot - again: have never played fantasy football) and have to be entered into the system. The first part is pretty easy since the game masters will be "staff" and thus can be trusted to a certain degree to not mess with the system. But the second part bothers me quite a lot, especially since the actions may involve multiple steps and interactions with different players, like registering a deal with the system that then has to be approved by the other party or denied and passed on to a game master to decide. I would of course like to separate the game logic as far as possible from the presentation and basic form validation but am unsure how to do this in a clean fashion. Of course I could (and will) put some effort into making my own architectural decisions and prototype different ideas. But I am bound to make some stupid mistakes at some point, so I would like to avoid some of that by getting a little "book smart" beforehand. So the question is: Is there any kind of architectural works that I can read up on? Papers, blogs, maybe design documents or even source code? Writing this down this seems more like a business application with business rules, workflows and such... Any good entry points for that? EDIT: After reading the first answers I am under the impression of having made a mistake when including the "MMO" part into the title. The game will not be all fancy (i.e. 3D or such) on the client side and the logic will completely exist on the server. That is, apart from basic form validation for the user which will also be mirrored on the server side. So the target toolset will be HTML5, JavaScript, probably JQuery(UI). My question is more related to the software architecture/design of a system that enforces certain rules. Separation of ruleset and presentation One problem I am having is that I want to separate the game rules from the presentation. The first step would be to make an own module for the game "engine" that only exposes an interface that allows all actions to be taken in a clean way. If an action fails with regard to some pre/post condition, the engine throws an exception which is then presented to the user like "you cannot sell something you do not own" or "after that you would end up in a situation which is not a valid game state." The problem here is that I would like to be able to not even present invalid action in the first place or grey out the corresponding UI elements. Changing and tweaking the ruleset Another big thing is the ruleset. It will probably evolve over time and most definitely must be tweaked. What's more, it should be possible (to a certain extent) to build a ruleset that fits a specific game round, i.e. choosing different kinds of behaviours in different aspects of the game. This would do something like "we play it with extension A today but we throw out extension B." For me, this screams "Architectural/Design pattern" but I have no idea on who might have published on something like this, not even what to google for.

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• Making user input/math on data fast, unlike excel type programs

  - by proGrammar

  I'm creating a research platform solely for myself to do some research on data. Programs like excel are terribly slow for me so I'm trying to come up with another solution. Originally I used excel. A1 was the cell that contained the data and all other cells in use calculated something on A1, or on other cells, that all could be in the end traced to A1. A1 was like an element of an array, I then I incremented it to go through all my data. This was way too slow. So the only other option I found originally was to hand code in c# the calculations inside a loop. Then I simply recompiled each time I changed my math. This was terribly slow to do and I had to order everything correctly so things would update correctly (dependencies). I could have also used events, but hand coding events for each cell like calculation would also be very slow. Next I created an application to read Excel and to perfectly imitate it. Which is what I now use. Basically I write formulas onto a fraction of my data to get live results inside excel. Then my program reads excel, writes another c# program, compiles it, and runs that program which runs my excel created formulas through a lot more data a whole lot faster. The advantage being my application dependency sorts everything (or I could use events) so I don't have to (like excel does) And of course the speed. But now its not a single application anymore. Instead its 2 applications, one which only reads my formulas and writes another program. The other one being the result which only lives for a short while before I do other runs through my data with different formulas / settings. So I can't see multiple results at one time without introducing even more programs like a database or at least having the 2 applications talking to each other. My idea was to have a dll that would be written, compiled, loaded, and unloaded again and again. So a self-updating program, sort of. But apparently that's not possible without another appdomain which means data has to be marshaled to be moved between the appdomains. Which would slow things down, not for summaries, but for other stuff I need to do with all my data. I'm also forgetting to mention a huge problem with restarting an application again and again which is having to reload ALL my data into memory again and again. But its still a whole lot faster than excel. I'm really super puzzled as to what people do when they want to research data fast. I'm completely unable to have a program accept user input and having it fast. My understanding is that it would have to do things like excel which is to evaluate strings again and again. So my only option is to repeatedly compile applications. Do I have a correct understanding on computer science? I've only just began programming, and didn't think I would have to learn much to do some simple math on data. My understanding is its either compiling my user defined stuff to a program or evaluating them from a string or something stupid again and again. And my only option is to probably switch operating systems or something to be able to have a program compile and run itself without stopping (writing/compiling dll, loading dll to program, unloading, and repeating). Can someone give me some idea on how computers work? Is anything better possible? Like a running program, that can accept user input and compile it and then unload it later? I mean heck operating systems dont need to be RESTARTED with every change to user input. What is this the cave man days? Sorry, it's just so super frustrating not knowing what one can do, and can't do. If only I could understand and learn this stuff fast enough.

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• ?????Java EE??????????(?2?)????

  - by Masa Sasaki

  WebLogic Server?????????????WebLogic Server???????? 2014?6?24?? ??48?WebLogic Server???@??????????? ?????????Java EE???????????????(?4?)??2???? 5?27?????????1? Java EE&WebLogic Server??? ?Web ?????????????Java??????????????????????????? Java EE????????????????WebLogic Server??????????????????????????? WebLogic Server???????????????????????Java EE???????????????????? JSF(JavaServer Faces)??????????????????????????????????? ?2????????????? (?????? Fusion Middleware?????? ??? ??) ?1? Java EE & Oracle WebLogic Server??????????? ????????·????? ??????????????????????????????? ????????????????????? ??????????????????????????? ???????????????????? ???????????????????????????????? ?????????????????????????????????? ??????????????????????????·??????? ???????????????????? ???????????????????????????? ???????????=????????????????????? ????????·??????????????????????? ??????????????????????????? ??????????????????????????? Oracle WebLogic Server??????Java EE 6?????????????? ???????????????Java EE ??????????????? ?????? Java EE 6???????????? Java EE 6?????JSR-000316 JavaTM Platform, Enterprise Edition 6 (Final Release)? ?????????JSF 2.1(??????????????????????????Web????????·???????)?Servlet3.1(?????·???????????????????????Servlet???Ajax??)? EJB3.1(?????·????????????????????????????????)? JAX-RS(??????????????Web????????)? CDI(????????????????????DI???????????)??? ???????????????? ?2???3???4?????Web????????????????2?JSF (JavaServer Faces), ?3?EJB(Enterprise JavaBeans)?CDI(Context Dependency Injection)? ?4?JPA(Java Persistent API)???????????????????????????????? ?????????????????????????????????????????????????????????? WebLogic Server?? ?2???????????????WebLogic Server????????????? ???WebLogic Server???????????????????????????????????? ??????? ???????·?????????????????? ??48?WebLogic Server???@???????????? 2014?6?24?? ??48?WebLogic Server???@?????????????????????????? ???????????????? ??????Java EE??????????????: ?2?JSF??? JSF (JavaServer Faces)??Web????????????????????????????????Web??????????????????JSF????? ????????????????JSF??????????????????????????????????????????Ajax? ?????????? ?????? ??????????? ?? ?? ?OutOfMemoryError ?????/Heap ?????(MAT)????? Java????????????????????(??OOME)?????????????????????????????????? ???????????????????????????????????Eclipse Memory Analyzer(MAT)???????????? ?????????????????? ???????????? ?? ??? ????????Q&A? ?WebLogic Server?????????????????????? (???)WebLogic Server?????? ?????? WebLogic Server??? WebLogic Server?????????WebLogic Server???? ?! WebLogic Server??????(???????????) WebLogic Server???????? WebLogic Server??????

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• Wubi and Vista 64 bits can't work

  - by Daok

  First of all, I have posted this issue at Ubuntu Forum without success yet. Hello, I have downloaded "kubuntu-9.10-desktop-amd64.iso" and I have mounted it on my Windows Vista 64 bits Ultimate. I have downloaded wubi 9.10. The problem is when installing, it crash after few time. Here is the log file: 11-26 21:07 INFO root: === wubi 9.10ubuntu1 rev160 === 11-26 21:07 DEBUG root: Logfile is c:\users\patrick\appdata\local\temp\wubi-9.10ubuntu1-rev160.log 11-26 21:07 DEBUG root: sys.argv = ['main.pyo', '--exefile="Z:\\wubi.exe"'] 11-26 21:07 DEBUG CommonBackend: data_dir=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\data 11-26 21:07 DEBUG WindowsBackend: 7z=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\bin\7z.exe 11-26 21:07 DEBUG CommonBackend: Fetching basic info... 11-26 21:07 DEBUG CommonBackend: original_exe=Z:\wubi.exe 11-26 21:07 DEBUG CommonBackend: platform=win32 11-26 21:07 DEBUG CommonBackend: osname=nt 11-26 21:07 DEBUG CommonBackend: language=fr_CA 11-26 21:07 DEBUG CommonBackend: encoding=cp1252 11-26 21:07 DEBUG WindowsBackend: arch=amd64 11-26 21:07 DEBUG CommonBackend: Parsing isolist=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\data\isolist.ini 11-26 21:07 DEBUG CommonBackend: Adding distro Xubuntu-i386 11-26 21:07 DEBUG CommonBackend: Adding distro Xubuntu-amd64 11-26 21:07 DEBUG CommonBackend: Adding distro Kubuntu-amd64 11-26 21:07 DEBUG CommonBackend: Adding distro Mythbuntu-i386 11-26 21:07 DEBUG CommonBackend: Adding distro Ubuntu-amd64 11-26 21:07 DEBUG CommonBackend: Adding distro Ubuntu-i386 11-26 21:07 DEBUG CommonBackend: Adding distro Mythbuntu-amd64 11-26 21:07 DEBUG CommonBackend: Adding distro Kubuntu-i386 11-26 21:07 DEBUG CommonBackend: Adding distro KubuntuNetbook-i386 11-26 21:07 DEBUG CommonBackend: Adding distro UbuntuNetbookRemix-i386 11-26 21:07 DEBUG WindowsBackend: Fetching host info... 11-26 21:07 DEBUG WindowsBackend: registry_key=Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi 11-26 21:07 DEBUG WindowsBackend: windows version=vista 11-26 21:07 DEBUG WindowsBackend: windows_version2=Windows (TM) Vista Ultimate 11-26 21:07 DEBUG WindowsBackend: windows_sp=None 11-26 21:07 DEBUG WindowsBackend: windows_build=6002 11-26 21:07 DEBUG WindowsBackend: gmt=-5 11-26 21:07 DEBUG WindowsBackend: country=CA 11-26 21:07 DEBUG WindowsBackend: timezone=America/Montreal 11-26 21:07 DEBUG WindowsBackend: windows_username=Patrick 11-26 21:07 DEBUG WindowsBackend: user_full_name=Patrick 11-26 21:07 DEBUG WindowsBackend: user_directory=C:\Users\Patrick 11-26 21:07 DEBUG WindowsBackend: windows_language_code=1036 11-26 21:07 DEBUG WindowsBackend: windows_language=French 11-26 21:07 DEBUG WindowsBackend: processor_name=Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz 11-26 21:07 DEBUG WindowsBackend: bootloader=vista 11-26 21:07 DEBUG WindowsBackend: system_drive=Drive(C: hd 239816.335938 mb free ntfs) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(C: hd 239816.335938 mb free ntfs) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(D: cd 0.0 mb free ) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(E: hd 483619.367188 mb free ntfs) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(G: hd 84606.9375 mb free fat32) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(Z: cd 0.0 mb free cdfs) 11-26 21:07 DEBUG WindowsBackend: uninstaller_path=C:\ubuntu\uninstall-wubi.exe 11-26 21:07 DEBUG WindowsBackend: previous_target_dir=C:\ubuntu 11-26 21:07 DEBUG WindowsBackend: previous_distro_name=Kubuntu 11-26 21:07 DEBUG WindowsBackend: keyboard_id=269029385 11-26 21:07 DEBUG WindowsBackend: keyboard_layout=ca 11-26 21:07 DEBUG WindowsBackend: keyboard_variant= 11-26 21:07 DEBUG CommonBackend: python locale=('fr_CA', 'cp1252') 11-26 21:07 DEBUG CommonBackend: locale=fr_CA.UTF-8 11-26 21:07 DEBUG WindowsBackend: total_memory_mb=4095.99999905 11-26 21:07 DEBUG CommonBackend: Searching ISOs on USB devices 11-26 21:07 DEBUG CommonBackend: Searching for local CDs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Kubuntu Netbook CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Kubuntu Netbook CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Kubuntu Netbook CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Kubuntu Netbook CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether Z:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: parsing info from str=Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) 11-26 21:07 DEBUG Distro: parsed info={'name': 'Kubuntu', 'subversion': 'Release', 'version': '9.10', 'build': '20091027', 'codename': 'Karmic Koala', 'arch': 'amd64'} 11-26 21:07 DEBUG Distro: wrong name: Kubuntu != Ubuntu 11-26 21:07 DEBUG Distro: checking whether Z:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: wrong name: Kubuntu != Ubuntu 11-26 21:07 DEBUG Distro: checking whether Z:\ is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: wrong name: Kubuntu != Ubuntu Netbook Remix 11-26 21:07 DEBUG Distro: checking whether Z:\ is a valid Kubuntu CD 11-26 21:07 INFO Distro: Found a valid CD for Kubuntu: Z:\ 11-26 21:07 INFO root: Running the CD menu... 11-26 21:07 DEBUG WindowsFrontend: __init__... 11-26 21:07 DEBUG WindowsFrontend: on_init... 11-26 21:07 INFO WinuiPage: appname=wubi, localedir=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\translations, languages=['fr_CA', 'fr'] 11-26 21:07 INFO WinuiPage: appname=wubi, localedir=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\translations, languages=['fr_CA', 'fr'] 11-26 21:07 INFO root: CD menu finished 11-26 21:07 INFO root: Already installed, running the uninstaller... 11-26 21:07 INFO root: Running the uninstaller... 11-26 21:07 INFO CommonBackend: This is the uninstaller running 11-26 21:07 INFO WinuiPage: appname=wubi, localedir=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\translations, languages=['fr_CA', 'fr'] 11-26 21:07 INFO root: Received settings 11-26 21:07 INFO WinuiPage: appname=wubi, localedir=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\translations, languages=['fr_CA', 'fr'] 11-26 21:07 DEBUG TaskList: # Running tasklist... 11-26 21:07 DEBUG TaskList: ## Running Sauvegarder l'ISO... 11-26 21:07 DEBUG TaskList: ## Finished Sauvegarder l'ISO 11-26 21:07 DEBUG TaskList: ## Running Supprimer l'entrée pour le programme d'amorçage... 11-26 21:07 DEBUG WindowsBackend: Could not find bcd id 11-26 21:07 DEBUG WindowsBackend: undo_bootini C: 11-26 21:07 DEBUG WindowsBackend: undo_configsys Drive(C: hd 239816.335938 mb free ntfs) 11-26 21:07 DEBUG WindowsBackend: undo_bootini E: 11-26 21:07 DEBUG WindowsBackend: undo_configsys Drive(E: hd 483619.367188 mb free ntfs) 11-26 21:07 DEBUG WindowsBackend: undo_bootini G: 11-26 21:07 DEBUG WindowsBackend: undo_configsys Drive(G: hd 84606.9375 mb free fat32) 11-26 21:07 DEBUG TaskList: ## Finished Supprimer l'entrée pour le programme d'amorçage 11-26 21:07 DEBUG TaskList: ## Running Supprimer le répertoire cible... 11-26 21:07 DEBUG CommonBackend: Deleting C:\ubuntu 11-26 21:07 DEBUG TaskList: ## Finished Supprimer le répertoire cible 11-26 21:07 DEBUG TaskList: ## Running Supprimer la clé du registre... 11-26 21:07 DEBUG TaskList: ## Finished Supprimer la clé du registre 11-26 21:07 DEBUG TaskList: # Finished tasklist 11-26 21:07 INFO root: Almost finished uninstalling 11-26 21:07 INFO root: Finished uninstallation 11-26 21:07 DEBUG CommonBackend: Fetching basic info... 11-26 21:07 DEBUG CommonBackend: original_exe=Z:\wubi.exe 11-26 21:07 DEBUG CommonBackend: platform=win32 11-26 21:07 DEBUG CommonBackend: osname=nt 11-26 21:07 DEBUG WindowsBackend: arch=amd64 11-26 21:07 DEBUG CommonBackend: Parsing isolist=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\data\isolist.ini 11-26 21:07 DEBUG CommonBackend: Adding distro Xubuntu-i386 11-26 21:07 DEBUG CommonBackend: Adding distro Xubuntu-amd64 11-26 21:07 DEBUG CommonBackend: Adding distro Kubuntu-amd64 11-26 21:07 DEBUG CommonBackend: Adding distro Mythbuntu-i386 11-26 21:07 DEBUG CommonBackend: Adding distro Ubuntu-amd64 11-26 21:07 DEBUG CommonBackend: Adding distro Ubuntu-i386 11-26 21:07 DEBUG CommonBackend: Adding distro Mythbuntu-amd64 11-26 21:07 DEBUG CommonBackend: Adding distro Kubuntu-i386 11-26 21:07 DEBUG CommonBackend: Adding distro KubuntuNetbook-i386 11-26 21:07 DEBUG CommonBackend: Adding distro UbuntuNetbookRemix-i386 11-26 21:07 DEBUG WindowsBackend: Fetching host info... 11-26 21:07 DEBUG WindowsBackend: registry_key=Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi 11-26 21:07 DEBUG WindowsBackend: windows version=vista 11-26 21:07 DEBUG WindowsBackend: windows_version2=Windows (TM) Vista Ultimate 11-26 21:07 DEBUG WindowsBackend: windows_sp=None 11-26 21:07 DEBUG WindowsBackend: windows_build=6002 11-26 21:07 DEBUG WindowsBackend: gmt=-5 11-26 21:07 DEBUG WindowsBackend: country=CA 11-26 21:07 DEBUG WindowsBackend: timezone=America/Montreal 11-26 21:07 DEBUG WindowsBackend: windows_username=Patrick 11-26 21:07 DEBUG WindowsBackend: user_full_name=Patrick 11-26 21:07 DEBUG WindowsBackend: user_directory=C:\Users\Patrick 11-26 21:07 DEBUG WindowsBackend: windows_language_code=1036 11-26 21:07 DEBUG WindowsBackend: windows_language=French 11-26 21:07 DEBUG WindowsBackend: processor_name=Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz 11-26 21:07 DEBUG WindowsBackend: bootloader=vista 11-26 21:07 DEBUG WindowsBackend: system_drive=Drive(C: hd 240512.851563 mb free ntfs) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(C: hd 240512.851563 mb free ntfs) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(D: cd 0.0 mb free ) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(E: hd 483523.867188 mb free ntfs) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(G: hd 84445.65625 mb free fat32) 11-26 21:07 DEBUG WindowsBackend: drive=Drive(Z: cd 0.0 mb free cdfs) 11-26 21:07 DEBUG WindowsBackend: uninstaller_path=None 11-26 21:07 DEBUG WindowsBackend: previous_target_dir=None 11-26 21:07 DEBUG WindowsBackend: previous_distro_name=None 11-26 21:07 DEBUG WindowsBackend: keyboard_id=269029385 11-26 21:07 DEBUG WindowsBackend: keyboard_layout=ca 11-26 21:07 DEBUG WindowsBackend: keyboard_variant= 11-26 21:07 DEBUG WindowsBackend: total_memory_mb=4095.99999905 11-26 21:07 DEBUG CommonBackend: Searching ISOs on USB devices 11-26 21:07 DEBUG CommonBackend: Searching for local CDs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Kubuntu Netbook CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Kubuntu Netbook CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether D:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain D:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Kubuntu Netbook CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether E:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain E:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Kubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Kubuntu Netbook CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Xubuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether G:\ is a valid Mythbuntu CD 11-26 21:07 DEBUG Distro: does not contain G:\casper\filesystem.squashfs 11-26 21:07 DEBUG Distro: checking whether Z:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: wrong name: Kubuntu != Ubuntu 11-26 21:07 DEBUG Distro: checking whether Z:\ is a valid Ubuntu CD 11-26 21:07 DEBUG Distro: wrong name: Kubuntu != Ubuntu 11-26 21:07 DEBUG Distro: checking whether Z:\ is a valid Ubuntu Netbook Remix CD 11-26 21:07 DEBUG Distro: wrong name: Kubuntu != Ubuntu Netbook Remix 11-26 21:07 DEBUG Distro: checking whether Z:\ is a valid Kubuntu CD 11-26 21:07 INFO Distro: Found a valid CD for Kubuntu: Z:\ 11-26 21:07 INFO root: Running the installer... 11-26 21:07 INFO WinuiPage: appname=wubi, localedir=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\translations, languages=['fr_CA', 'fr'] 11-26 21:07 INFO WinuiPage: appname=wubi, localedir=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\translations, languages=['fr_CA', 'fr'] 11-26 21:07 DEBUG WinuiInstallationPage: target_drive=C:, installation_size=17000MB, distro_name=Kubuntu, language=en_US, locale=en_US.UTF-8, username=patrick 11-26 21:07 INFO root: Received settings 11-26 21:07 INFO WinuiPage: appname=wubi, localedir=C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\translations, languages=['en_US', 'en'] 11-26 21:07 DEBUG TaskList: # Running tasklist... 11-26 21:07 DEBUG TaskList: ## Running select_target_dir... 11-26 21:07 INFO WindowsBackend: Installing into C:\ubuntu 11-26 21:07 DEBUG TaskList: ## Finished select_target_dir 11-26 21:07 DEBUG TaskList: ## Running create_dir_structure... 11-26 21:07 DEBUG CommonBackend: Creating dir C:\ubuntu 11-26 21:07 DEBUG CommonBackend: Creating dir C:\ubuntu\disks 11-26 21:07 DEBUG CommonBackend: Creating dir C:\ubuntu\install 11-26 21:07 DEBUG CommonBackend: Creating dir C:\ubuntu\install\boot 11-26 21:07 DEBUG CommonBackend: Creating dir C:\ubuntu\disks\boot 11-26 21:07 DEBUG CommonBackend: Creating dir C:\ubuntu\disks\boot\grub 11-26 21:07 DEBUG CommonBackend: Creating dir C:\ubuntu\install\boot\grub 11-26 21:07 DEBUG TaskList: ## Finished create_dir_structure 11-26 21:07 DEBUG TaskList: ## Running uncompress_target_dir... 11-26 21:07 DEBUG TaskList: ## Finished uncompress_target_dir 11-26 21:07 DEBUG TaskList: ## Running create_uninstaller... 11-26 21:07 DEBUG WindowsBackend: Copying uninstaller Z:\wubi.exe -> C:\ubuntu\uninstall-wubi.exe 11-26 21:07 DEBUG registry: Setting registry key -2147483646 Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi UninstallString C:\ubuntu\uninstall-wubi.exe 11-26 21:07 DEBUG registry: Setting registry key -2147483646 Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi InstallationDir C:\ubuntu 11-26 21:07 DEBUG registry: Setting registry key -2147483646 Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi DisplayName Kubuntu 11-26 21:07 DEBUG registry: Setting registry key -2147483646 Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi DisplayIcon C:\ubuntu\Kubuntu.ico 11-26 21:07 DEBUG registry: Setting registry key -2147483646 Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi DisplayVersion 9.10ubuntu1-rev160 11-26 21:07 DEBUG registry: Setting registry key -2147483646 Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi Publisher Kubuntu 11-26 21:07 DEBUG registry: Setting registry key -2147483646 Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi URLInfoAbout http://www.kubuntu.org 11-26 21:07 DEBUG registry: Setting registry key -2147483646 Software\Microsoft\Windows\CurrentVersion\Uninstall\Wubi HelpLink http://www.ubuntu.com/support 11-26 21:07 DEBUG TaskList: ## Finished create_uninstaller 11-26 21:07 DEBUG TaskList: ## Running copy_installation_files... 11-26 21:07 DEBUG WindowsBackend: Copying C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\data\custom-installation -> C:\ubuntu\install\custom-installation 11-26 21:07 DEBUG WindowsBackend: Copying C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\winboot -> C:\ubuntu\winboot 11-26 21:07 DEBUG WindowsBackend: Copying C:\Users\Patrick\AppData\Local\Temp\pyl5A09.tmp\data\images\Kubuntu.ico -> C:\ubuntu\Kubuntu.ico 11-26 21:07 DEBUG TaskList: ## Finished copy_installation_files 11-26 21:07 DEBUG TaskList: ## Running get_iso... 11-26 21:07 DEBUG TaskList: New task copy_file 11-26 21:07 DEBUG TaskList: ### Running copy_file... 11-26 21:09 DEBUG TaskList: ### Finished copy_file 11-26 21:09 ERROR TaskList: [Errno 22] Invalid argument Traceback (most recent call last): File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__ File "\lib\wubi\backends\common\utils.py", line 209, in copy_file IOError: [Errno 22] Invalid argument 11-26 21:09 DEBUG TaskList: # Cancelling tasklist 11-26 21:09 DEBUG TaskList: New task check_iso 11-26 21:09 ERROR root: [Errno 22]

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• Macports: port install jpeg fails

  - by Philipp Keller

  History: installed MacPorts on Leopard upgraded to Snow Leopard uninstall all ports reinstalled XCode sudo port uninstall jpeg sudo port install jpeg DEBUG: Found port in file:///opt/local/var/macports/sources/rsync.macports.org/release/ports/graphics/jpeg DEBUG: Changing to port directory: /opt/local/var/macports/sources/rsync.macports.org/release/ports/graphics/jpeg DEBUG: OS Platform: darwin DEBUG: OS Version: 10.3.0 DEBUG: Mac OS X Version: 10.6 DEBUG: System Arch: i386 DEBUG: setting option os.universal_supported to yes DEBUG: org.macports.load registered provides 'load', a pre-existing procedure. Target override will not be provided DEBUG: org.macports.unload registered provides 'unload', a pre-existing procedure. Target override will not be provided DEBUG: org.macports.distfiles registered provides 'distfiles', a pre-existing procedure. Target override will not be provided DEBUG: adding the default universal variant DEBUG: Reading variant descriptions from /opt/local/var/macports/sources/rsync.macports.org/release/ports/_resources/port1.0/variant_descriptions.conf DEBUG: Requested variant darwin is not provided by port jpeg. DEBUG: Requested variant i386 is not provided by port jpeg. DEBUG: Requested variant macosx is not provided by port jpeg. --- Computing dependencies for jpeg DEBUG: Executing org.macports.main (jpeg) DEBUG: Skipping completed org.macports.fetch (jpeg) DEBUG: Skipping completed org.macports.checksum (jpeg) DEBUG: Skipping completed org.macports.extract (jpeg) DEBUG: Skipping completed org.macports.patch (jpeg) --- Configuring jpeg DEBUG: Using compiler 'Mac OS X gcc 4.2' DEBUG: Executing org.macports.configure (jpeg) DEBUG: Environment: CFLAGS='-O2 -arch x86_64' CXXFLAGS='-O2 -arch x86_64' MACOSX_DEPLOYMENT_TARGET='10.6' CXX='/usr/bin/g++-4.2' F90FLAGS='-O2 -m64' LDFLAGS='-arch x86_64' OBJC='/usr/bin/gcc-4.2' FCFLAGS='-O2 -m64' INSTALL='/usr/bin/install -c' OBJCFLAGS='-O2 -arch x86_64' FFLAGS='-O2 -m64' CC='/usr/bin/gcc-4.2' DEBUG: Assembled command: 'cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_jpeg/work/jpeg-8a" && ./configure --prefix=/opt/local' sh: line 0: cd: /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_jpeg/work/jpeg-8a: No such file or directory Error: Target org.macports.configure returned: configure failure: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_jpeg/work/jpeg-8a" && ./configure --prefix=/opt/local " returned error 1 DEBUG: Backtrace: configure failure: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_jpeg/work/jpeg-8a" && ./configure --prefix=/opt/local " returned error 1 while executing "$procedure $targetname" Warning: the following items did not execute (for jpeg): org.macports.activate org.macports.configure org.macports.build org.macports.destroot org.macports.install Error: Status 1 encountered during processing. To report a bug, see http://guide.macports.org/#project.tickets

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• Oracle Application Server Performance Monitoring and Tuning (CPU load high)

  - by Berkay

  Oracle Application Server Performance Monitoring and Tuning (CPU load high) i have just hired by a company and my boss give me a performance issue to solve as soon as possible. I don't have any experience with the Java EE before at the server side. Let me begin what i learned about the system and still couldn't find the solution: We have an Oracle Application Server (10.1.) and Oracle Database server (9.2.), the software guys wrote a kind of big J2EE project (X project) using specifically JSF 1.2 with Ajax which is only used in this project. They actively use PL/SQL in their code. So, we started the application server (Solaris machine), everything seems OK. users start using the app starting Monday from different locations (app 200 have user accounts,i just checked and see that the connection pool is set right, the session are active only 15 minutes). After sometime (2 days) CPU utilization gets high,%60, at night it is still same nothing changed (the online user amount is nearly 1 or 2 at this time), even it starts using the CPU allocated for other applications on the same server because they freed If we don't restart the server, the utilization becomes %90 following 2 days, application is so slow that end users starts calling. The main problem is software engineers say that code is clear, and the System and DBA managers say that we have the correct configuration,the other applications seems OK why this problem happens only for X application. I start copying the DB to a test platform and upgrade it to the latest version, also did in same with the application server (Weblogic) if there is a bug or not. i only tested by myself only one user and weblogic admin panel i can track the threads and dump them. i noticed that there are some threads showing as a hogging. when i checked the manuals and control the trace i see that it directs me the line number where PL/SQL code is called from a .java file. The software eng. says that yes we have really complex PL/SQL codes but what's the relation with Application server? this is the problem of DB server, i guess they're right... I know the question has many holes, i'd like to give more in detail but i appreciate the way you guide me. Thanks in advance ... Edit: The server both in CPU and Memory enough to run more complex applications

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• free open-source linux screenshot & ocr tool

  - by Gryllida

  I'm looking for a tool which would be able to capture a screen region, pass it to OCR and put the result into clipboard. "import ppm:- | gocr -i - | xclip -selection c" works, but gocr is unreliable: simple text on a webpage has errors. It is a clear font but the OCR tool always misses "r" and replaces it with underscore. "import ppm:- | ocrad -i - | xclip -selection c" says "ocrad: maxval 255 in ppm "P6" file." tesseract needs an image file and does not accept piping input to it. xfce4-screenshooter does not do OCR. ABBYY Screenshot Reader is proprietary. tessnet2 is freeware running on a proprietary platform. Google Docs can OCR screenshots in a batch. But my data is confidential and better not put online. Graphical interface solutions would be acceptable for this question, too. There is a number of existing SuperUser questions about OCR. They fall in several categories. Questions just about OCR without the "screenshot taking" part. Open Source OCR for linux Free OCR for Arabic text Looking for recommendations on OCR problem - tabular numeric data Which has better OCR applications: Ubuntu, or Mac/iPad, or Windows? How can I preform OCR from the command line? OCR solution on linux machine from command line (duplicate) Free OCR software OCR for Sanskrit ( OR devanagari) Copy image and paste to OCR (windows) File processing OCR instead of screenshot. Online OCR website for processing an entire pdf file at one time? Practical OCR solution for converting a large book to a digital format? How to extract text with OCR from a PDF on Linux? Batch-OCR many PDFs OCR Image based PDF Copy image and paste to OCR Extract OCR text from Evernote OCR in Word 2013 Replace (OCR) garbled text in PDF? Process files prior to running OCR. How can I make OCR recognize my documents' text better? Tesseract OCR recognition bilingual document. mistakes tolerance level setup OCR for low quality images How do I get the best quality screenshot for OCR (Optical Character Recognition) and what tool would be the best for screenshots? OCR training. Training Tesseract-OCR for english language fonts None of them answer this question.

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