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• Natural vs surrogate keys on support tables

  - by Bugeo

  I have read many articles about the battle between natural versus surrogate primary keys. I agree in the use of surrogate keys to identify records of tables whose contents are created by the user. But in the case of supporting tables what should I use? For example, in a hypothetical table "orderStates". If you use a natural key would have the following data: TABLE ORDERSTATES {ID: "NEW", NAME: "New"} {ID: "MANAGEMENT" NAME: "Management"} {ID: "SHIPPED" NAME: "Shipped"} If I use a surrogate key would have the following data: TABLE ORDERSTATES {ID: 1 CODE: "NEW", NAME: "New"} {ID: 2 CODE: "MANAGEMENT" NAME: "Management"} {ID: 3 CODE: "SHIPPED" NAME: "Shipped"} Now let's take an example: a user enters a new order. In the case in which use natural keys, in the code I can write this: newOrder.StateOrderId = "NEW"; With the surrogate keys instead every time I have an additional step. stateOrderId_NEW = .... I retrieve the id corresponding to the recod code "NEW" newOrder.StateOrderId = stateOrderId_NEW; The same will happen every time I have to move the order in a new status. So, in this case, what are the reason to chose one key type vs the other one?

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• ajax html vs xml/json responses - perfomance or other reasons

  - by pedalpete

  I've got a fairly ajax heavy site and some 3k html formatted pages are inserted into the DOM from ajax requests. What I have been doing is taking the html responses and just inserting the whole thing using jQuery. My other option is to output in xml (or possibly json) and then parse the document and insert it into the page. I've noticed it seems that most larger site do things the json/xml way. Google Mail returns xml rather than formatted html. Is this due to performance? or is there another reason to use xml/json vs just retrieving html? From a javascript standpoint, it would seem injecting direct html is simplest. In jQuery I just do this jQuery.ajax({ type: "POST", url: "getpage.php", data: requestData, success: function(response){ jQuery('div#putItHear').html(response); } with an xml/json response I would have to do jQuery.ajax({ type: "POST", url: "getpage.php", data: requestData, success: function(xml){ $("message",xml).each(function(id) { message = $("message",xml).get(id); $("#messagewindow").prepend(""+$("author",message).text()+ ": "+$("text",message).text()+ ""); }); } }); clearly not as efficient from a code standpoint, and I can't expect that it is better browser performance, so why do things the second way?

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• codegen:nullValue vs msprop:nullValue

  - by Ken

  Ok, I have datasets that I created way back in 1.1 framework to which we used codegen:nullValue within the XSD to handle null values. However if I open one of these datasets with vs 2005 (i.e. 2.0 framework) and add a column, it removes the codegen setting from the entire xsd but adds in msprop:nullValue However, unlike previous years, I noticed this time the proper property code was NOT over riden from returning the null value specified in codegen as it was doing in the past. Meaning the msprop appears to be creating the proper code behind the scenes (See example). Anyone know of any other differnces? Should I be concerned with deploying a new xsd, WITHOUT the codegen code but instead with the msprop xml? Example: Original creates _ Public Property ParentID() As Integer Get If Me.IsParentIDNull Then Return -1 Else Return CType(Me(Me.tableCompany.ParentIDColumn),Integer) End If End Get Set Me(Me.tableCompany.ParentIDColumn) = value End Set End Property New creates _ Public Property ParentID() As Integer Get If Me.IsParentIDNull Then Return -1 Else Return CType(Me(Me.tableCompany.ParentIDColumn),Integer) End If End Get Set Me(Me.tableCompany.ParentIDColumn) = value End Set End Property BUT is there anything else that might be occuring that I am NOT seeing thus MAKING me re-enter all the codegen settings? THANKS!

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• Doing coding in Linux through a virtual machine on Windows VS partitioning

  - by ihaveitnow

  I already have experience with setting up virtual machines, running them and other minor tasks. Im a gamer, so I wont get rid of windows (for now at least...) but I do want to be a great programmer and to be involved with the Open-Source community. Id like to know if its a good idea to do my programming in linux through a virtual machine, vs giving it a partitioned section of the HDD. Id like to know about performance pros and cons and functionality. All responses are appreciated, thanks in advance. The type of programming I intend to dive into : Android Dev, Web Dev, Desktop Dev...More Android and Web right now though. So im looking at C#,C,C++,Java,PHP,HTML,MySQL...Off the top of the dome. I do web designing as well, so dreamweaver is added as an "essential". But im sure I can do dreamweaver files and upload them to the server after programming in Linux...Right? And any info on IDE's in Linux for the above mentioned are appreciated, but i would prefer going the coding route and understanding the essence of whats happening "under the covers" Thanks to all for reading, I appreciate it. Hope this isnt confusing :S

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• Still Confused About Identifying vs. Non-Identifying Relationships

  - by Jason

  So, I've been reading up on identifying vs. non-identifying relationships in my database design, and a number of the answers on SO seem contradicting to me. Here are the two questions I am looking at: What's the Difference Between Identifying and Non-Identifying Relationships Trouble Deciding on Identifying or Non-Identifying Relationship Looking at the top answers from each question, I appear to get two different ideas of what an identifying relationship is. The first question's response says that an identifying relationship "describes a situation in which the existence of a row in the child table depends on a row in the parent table." An example of this that is given is, "An author can write many books (1-to-n relationship), but a book cannot exist without an author." That makes sense to me. However, when I read the response to question two, I get confused as it says, "if a child identifies its parent, it is an identifying relationship." The answer then goes on to give examples such as SSN (is identifying of a Person), but an address is not (because many people can live at an address). To me, this sounds more like a case of the decision between primary key and non-primary key. My own gut feeling (and additional research on other sites) points to the first question and its response being correct. However, I wanted to verify before I continued forward as I don't want to learn something wrong as I am working to understand database design. Thanks in advance.

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• Static Vs Non-Static Method Performance C#

  - by dotnetguts

  Hello All, I have few global methods declared in public class in my asp.net web application. I have habbit of declaring all global methods in public class in following format public static string MethodName(parameters) { } I want to know how it would impact on performance point of view? 1) Which one is Better? Static Method or Non-Static Method? 2) Reason why it is better? Following link shows Non-Static methods are good because, static methods are using locks to be Thread-safe. The always do internally a Monitor.Enter() and Monitor.exit() to ensure Thread-safety. http://bytes.com/topic/c-sharp/answers/231701-static-vs-non-static-function-performance And Following link shows Static Methods are good static methods are normally faster to invoke on the call stack than instance methods. There are several reasons for this in the C# programming language. Instance methods actually use the 'this' instance pointer as the first parameter, so an instance method will always have that overhead. Instance methods are also implemented with the callvirt instruction in the intermediate language, which imposes a slight overhead. Please note that changing your methods to static methods is unlikely to help much on ambitious performance goals, but it can help a tiny bit and possibly lead to further reductions. http://dotnetperls.com/static-method I am little confuse which one to use? Thanks

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• SQLAlchemy, one to many vs many to one

  - by sadvaw

  Dear Everyone, I have the following data: CREATE TABLE `groups` ( `bookID` INT NOT NULL, `groupID` INT NOT NULL, PRIMARY KEY(`bookID`), KEY( `groupID`) ); and a book table which basically has books( bookID, name, ... ), but WITHOUT groupID. There is no way for me to determine what the groupID is at the time of the insert for books. I want to do this in sqlalchemy. Hence I tried mapping Book to the books joined with groups on book.bookID=groups.bookID. I made the following: tb_groups = Table( 'groups', metadata, Column('bookID', Integer, ForeignKey('books.bookID'), primary_key=True ), Column('groupID', Integer), ) tb_books = Table( 'books', metadata, Column('bookID', Integer, primary_key=True), tb_joinedBookGroup = sql.join( tb_books, tb_groups, \ tb_books.c.bookID == tb_groups.c.bookID) and defined the following mapper: mapper( Group, tb_groups, properties={ 'books': relation(Book, backref='group') }) mapper( Book, tb_joinedBookGroup ) ... However, when I execute this piece of code, I realized that each book object has a field groups, which is a list, and each group object has books field which is a singular assigment. I think my definition here must have been causing sqlalchemy to be confused about the many-to-one vs one-to-many relationship. Can someone help me sort this out? My desired goal is g.books = [b, b, b, .. ] book.group = g, where g is an instance of group, and b is an instance of book

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• VS ASP.NET 500 Server Error

  - by rlb.usa

  Hey guys, I'm having a super weird problem with my VS 2008 solution. We had this hand-coded ASP.NET compiled web app on our old IIS6/Win2003 server, working great, moved it to our new IIS7/Win2008 server, still working great, but when I try to compile the application and publish it again to our new Win2008 server, I get server 500 errors. It's ASP.NET 2.0 with AJAX extensions and AJAX control toolkit. I'm not too great with server issues, or even sure if it is a server issue but here are some more symptoms... ? I know the website works (it only differs by some minor code fixes) and can use it's code on a development machine, there are no errors, and it publishes fine. Publishing (using the DLL files), and even not publishing and trying to use the code-behind files on our new server, both no success. The old website does work on the new server just fine. If I put a simple hello world html page in the website's virtual directory, with the old code, it works fine, but with the new code, that html page gets the 500 error. And in fact, oddly, I can add all the files to the website, only when I add the web.config, do I get the 500 error. The web.config has not changed. Tried stopping and restarting IIS What's the problem, here? Any ideas, what else can I do to troubleshoot the problem?

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• How to secure connection strings in VS?

  - by salvationishere

  I see several others have posted this question, however, none of the solutions I've tried have fixed this yet. I have a 32-bit XP running VS 2008 and I am trying to encrypt my connection string in my web.config file. But I am getting the error: The configuration section '...' was not found. Failed! The command I give it: C:\Program Files\Microsoft Visual Studio 9.0\VCAspnet_regiis.exe -pe "system.we b/AdventureWorksConnectionString2" -app "/Documents and Settings/Admin/My Docume nts/Visual Studio 2008/Projects/AddFileToSQL2" Also, how does -app map virtual directory? In other words the path above is the directory right below c:. Is this the correct path to use? And AddFileToSQL2 is the name of my project, although it is part of the AddFileToSQL solution. I have this folder web shared with all of the permissions. And the relevant part of my web.config file: <add name="AdventureWorksConnectionString2" connectionString="Data Source=SIDEKICK;Initial Catalog=AdventureWorks;Persist Security Info=true; User ID=AdventureWorks;Password=sqlMagic" providerName="System.Data.SqlClient" />

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• Confused about std::runtime_error vs. std::logic_error

  - by David Gladfelter

  I recently saw that the boost program_options library throws a logic_error if the command-line input was un-parsable. That challenged my assumptions about logic_error vs. runtime_error. I assumed that logic errors (logic_error and its derived classes) were problems that resulted from internal failures to adhere to program invariants, often in the form of illegal arguments to internal API's. In that sense they are largely equivalent to ASSERT's, but meant to be used in released code (unlike ASSERT's which are not usually compiled into released code.) They are useful in situations where it is infeasible to integrate separate software components in debug/test builds or the consequences of a failure are such that it is important to give runtime feedback about the invalid invariant condition to the user. Similarly, I thought that runtime_errors resulted exclusively from runtime conditions outside of the control of the programmer: I/O errors, invalid user input, etc. However, program_options is obviously heavily (primarily?) used as a means of parsing end-user input, so under my mental model it certainly should throw a runtime_error in the case of bad input. Where am I going wrong? Do you agree with the boost model of exception typing?

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• Setting Icon for wpf application (VS 08)

  - by baron

  Hi everyone, Before going much further i'll mention I have tried solutions in following: http://stackoverflow.com/questions/320677/how-do-i-set-the-icon-for-my-application-in-visual-studio-2008 http://stackoverflow.com/questions/198848/set-application-icon-from-resources-in-vs-05 I am trying to set an icon for my application. AFAIK, I need potentially 3 images? 1 image is the actual image in explorer when clicking on the .exe (thumbnail for the exe) 1 image (tiny) in the top left corner (16 x 16? Not entirely sure) 1 image in the start menu dock, to the left of the app (maybe 32x32? again not sure) So thats fine. Now I have selected an Icon. How do I use it in one of above situations? I have tried adding it in resources, nothing seems to happen. Following that first SO solution, "First go to Resource View (from menu: View -- Other Window -- Resource View). Then in Resource View navigate through resources, if any. If there is already a resource of Icon type, added by Visual Studio, then open and edit it. Otherwise right-click and select Add Resource, and then add a new icon." The resource view is empty, and I cannot right click in this view. If I right click on the solution properties resources I can add the icon image, but it doesn't show in either of the locations listed above. (or anywhere that I can see) What am I doing wrong?

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• C++, overloading std::swap, compiler error, VS 2010

  - by Ian

  I would like to overload std::swap in my template class. In the following code (simplified) #ifndef Point2D_H #define Point2D_H template <class T> class Point2D { protected: T x; T y; public: Point2D () : x ( 0 ), y ( 0 ) {} Point2D( const T &x_, const T &y_ ) : x ( x_ ), y ( y_ ) {} .... public: void swap ( Point2D <T> &p ); }; template <class T> inline void swap ( Point2D <T> &p1, Point2D <T> &p2 ) { p1.swap ( p2 ); } namespace std { template <class T> inline void swap ( Point2D <T> &p1, Point2D <T> &p2 ) { p1.swap ( p2 ); } } template <class T> void Point2D <T>::swap ( Point2D <T> &p ) { using (std::swap); swap ( x, p.x ); swap ( y, p.y ); } #endif there is a compiler error (only in VS 2010): error C2668: 'std::swap' : ambiguous call to overloaded I do not know why, std::swap should be overoaded... Using g ++ code works perfectly. Without templates (i.e. Point2D is not a template class) this code also works.. Thanks for your help.

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• what happens when you stop VS debugger?

  - by mare

  If I have a line like this ContentRepository.Update(existing); that goes into datastore repository to update some object and I have a try..catch block in this Update function like this: string file = XmlProvider.DataStorePhysicalPath + o.GetType().Name + Path.DirectorySeparatorChar + o.Slug + ".xml"; DataContractSerializer dcs = new DataContractSerializer(typeof (BaseContentObject)); using ( XmlDictionaryWriter myWriter = XmlDictionaryWriter.CreateTextWriter(new FileStream(file, FileMode.Truncate, FileAccess.Write), Encoding.UTF8)) { try { dcs.WriteObject(myWriter, o); myWriter.Close(); } catch (Exception) { // if anything goes wrong, delete the created file if (File.Exists(file)) File.Delete(file); if(myWriter.WriteState!=WriteState.Closed) myWriter.Close(); } } then why would Visual Studio go on with calling Update() if I click "Stop" in debugging session on the above line? For instance, I came to that line by going line by line pressing F10 and now I'm on that line which is colored yellow and I press Stop. Apparently what happens is, VS goes to execute the Update() method and somehow figures out something gone wrong and goes into "catch" and deletes the file, which is wrong, because I want my catch to work when there is a true exception not when I debug a program and force to stop it.

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• Unexpected output from Bubblesort program with MSVC vs TCC

  - by Sujith S Pillai

  One of my friends sent this code to me, saying it doesn't work as expected: #include<stdio.h> void main() { int a [10] ={23, 100, 20, 30, 25, 45, 40, 55, 43, 42}; int sizeOfInput = sizeof(a)/sizeof(int); int b, outer, inner, c; printf("Size is : %d \n", sizeOfInput); printf("Values before bubble sort are : \n"); for ( b = 0; b &lt; sizeOfInput; b++) printf("%d\n", a[b]); printf("End of values before bubble sort... \n"); for ( outer = sizeOfInput; outer &gt; 0; outer-- ) { for ( inner = 0 ; inner &lt; outer ; inner++) { printf ( "Comparing positions: %d and %d\n",inner,inner+1); if ( a[inner] &gt; a[inner + 1] ) { int tmp = a[inner]; a[inner] = a [inner+1]; a[inner+1] = tmp; } } printf ( "Bubble sort total array size after inner loop is %d :\n",sizeOfInput); printf ( "Bubble sort sizeOfInput after inner loop is %d :\n",sizeOfInput); } printf ( "Bubble sort total array size at the end is %d :\n",sizeOfInput); for ( c = 0 ; c &lt; sizeOfInput; c++) printf("Element: %d\n", a[c]); } I am using Micosoft Visual Studio Command Line Tool for compiling this on a Windows XP machine. cl /EHsc bubblesort01.c My friend gets the correct output on a dinosaur machine (code is compiled using TCC there). My output is unexpected. The array mysteriously grows in size, in between. If you change the code so that the variable sizeOfInput is changed to sizeOfInputt, it gives the expected results! A search done at Microsoft Visual C++ Developer Center doesn't give any results for "sizeOfInput". I am not a C/C++ expert, and am curious to find out why this happens - any C/C++ experts who can "shed some light" on this? Unrelated note: I seriously thought of rewriting the whole code to use quicksort or merge sort before posting it here. But, after all, it is not Stooge sort... Edit: I know the code is not correct (it reads beyond the last element), but I am curious why the variable name makes a difference.

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• iPhone Image Resources, ICO vs PNG, app bundle filesize

  - by Jasarien

  My application has a collection of around 1940 icons that are used throughout. They're currently in ICO and new images provided to me come in ICO format too. I have noticed that they contain a 16x16 and 32x32 representation of each icon in one file. Each file is roughly 4KB in filesize (as reported by finder, but ls reports that they vary from being ~1000 bytes to 5000 bytes) A very small number of these icons only contain the 32x32 representation, and as a result are only around 700 bytes in size. Currently I am bundling these icons with my application and they are inflating the size of the app a bit more than I would like. Altogether, the images total just about 25.5MB. Xcode must do some kind of compression because the resulting app bundle is about 12.4MB. Compressing this further into a ZIP (as it would be when submitted to the App Store), results in a final file of 5.8MB. I'm aware that the maximum limit for over the air App Store downloads has been raised to 20MB since the introduction of the iPad (I'm not sure if that extends to iPhone apps as well as iPad apps though, if not the limit would be 10MB). My worry is that new icons are going to be added (sometimes up to 10 icons per week), and will continue to inflate the app bundle over time. What is the best way to distribute these icons with my app? Things I've tried and not had much success with: Converting the icons from ICO to PNG: I tried this in the hopes that the pngcrush utility would help out with the filesize. But it appears that it doesn't make much of a difference between a normal PNG and a crushed png (I believe it just optimises the image for display on the iPhone's GPU rather than compress it's size). Also in going from ICO to PNG actually increased the size of the icon file... Zipping the images, and then uncompressing them on first run. While this did reduce the overall image sizes, I found that the effort needed to unzip them, copy them to the documents folder and ensure that duplication doesn't happen on upgrades was too much hassle to be worth the benefit. Also, on original and 3G iPhones unzipping and copying around 25MB of images takes too long and creates a bad experience... Things I've considered but not yet tried: Instead of distributing the icons within the app bundle, host them online, and download each icon on demand (it depends on the user's data as to which icons will actually be displayed and when). Issues with this is that bandwidth costs money, and image downloads will be bandwidth intensive. However, my app currently has a small userbase of around 5,500 users (of which I estimate around 1500 to be active based on Flurry stats), and I have a huge unused bandwidth allowance with my current hosting package. So I'm open to thoughts on how to solve this tricky issue.

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• Memory issues - Living vs. overall -> app is killed

  - by D33

  I'm trying to check my applications memory issues in Instruments. When I load the application I play some sounds and show some animations in UIImageViews. To save some memory I load the sounds only when I need it and when I stop playing it I free it from the memory. problem 1: My application is using about 5.5MB of Living memory. BUT The Overall section is growing after start to 20MB and then it's slowly growing (about 100kB/sec). But responsible Library is OpenAL (OAL::Buffer), dyld (_dyld_start)-I am not sure what this really is, and some other stuff like ft_mem_qrealloc, CGFontStrikeSetValue, … problem 2: When the overall section breaks about 30MB, application crashes (is killed). According to the facts I already read about overall memory, it means then my all allocations and deallocation is about 30MB. But I don't really see the problem. When I need some sound for example I load it to the memory and when I don't need it anymore I release it. But that means when I load 1MB sound, this operation increase overall memory usage with 2MB. Am I right? And when I load 10 sounds my app crashes just because the fact my overall is too high even living is still low??? I am very confused about it. Could someone please help me clear it up? (I am on iOS 5 and using ARC) SOME CODE: creating the sound OpenAL: MYOpenALSound *sound = [[MyOpenALSound alloc] initWithSoundFile:filename willRepeat:NO]; if(!sound) return; [soundDictionary addObject:sound]; playing: [sound play]; dispatch_after(dispatch_time(DISPATCH_TIME_NOW, ((sound.duration * sound.pitch) + 0.1) * NSEC_PER_SEC), dispatch_get_current_queue(), ^{ [soundDictionary removeObjectForKey:[NSNumber numberWithInt:soundID]]; }); } creating the sound with AVAudioPlayer: [musics replaceObjectAtIndex:ID_MUSIC_MAP withObject:[[Music alloc] initWithFilename:@"mapMusic.mp3" andWillRepeat:YES]]; pom = [musics objectAtIndex:musicID]; [pom playMusic]; and stop and free it: [musics replaceObjectAtIndex:ID_MUSIC_MAP withObject:[NSNull null]]; AND IMAGE ANIMATIONS: I load images from big PNG file (this is realated also to my other topic : Memory warning - UIImageView and its animations) I have few UIImageViews and by time I'm setting animation arrays to play Animations... UIImage *source = [[UIImage alloc] initWithCGImage:[[UIImage imageNamed:@"imageSource.png"] CGImage]]; cutRect = CGRectMake(0*dimForImg.width,1*dimForImg.height,dimForImg.width,dimForImg.height); image1 = [[UIImage alloc] initWithCGImage:CGImageCreateWithImageInRect([source CGImage], cutRect)]; cutRect = CGRectMake(1*dimForImg.width,1*dimForImg.height,dimForImg.width,dimForImg.height); ... image12 = [[UIImage alloc] initWithCGImage:CGImageCreateWithImageInRect([source CGImage], cutRect)]; NSArray *images = [[NSArray alloc] initWithObjects:image1, image2, image3, image4, image5, image6, image7, image8, image9, image10, image11, image12, image12, image12, nil]; and this array I just use simply like : myUIImageView.animationImages = images, ... duration -> startAnimating

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• The program is executing properly on dev C++ but is giving problem in Linux.The movement is becoming

  - by srinija

  #include<stdio.h> #include<GL/glut.h> GLfloat v[3][24]={{100.0,300.0,350.0,50.0,100.0,120.0,120.0,100.0,260.0,280.0, 280.0,260.0,140.0,160.0,160.0,140.0,180.0,200.0,200.0,180.0, 220.0,240.0,240.0,220.0},{100.0,100.0,200.0,200.0,160.0, 160.0,180.0,180.0,160.0,160.0,180.0,180.0,160.0,160.0,180.0, 180.0,160.0,160.0,180.0,180.0,160.0,160.0,180.0,180.0}, {1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0, 1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0}}; GLfloat v1[3][16]={{50.0,350.0,350.0,50.0,100.0,300.0,300.0,100.0,125.0,175.0, 175.0,125.0,225.0,275.0,275.0,225.0},{200.0,200.0,210.0, 210.0,210.0,210.0,240.0,240.0,240.0,240.0,310.0,310.0,240.0, 240.0,310.0,310.0},{1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0, 1.0,1.0,1.0,1.0,1.0,1.0}}; GLfloat colors[4][3]={{0.0,0.0,1.0},{0.9961,0.9961,0.65625},{1.0,0.0,1.0}, {1.0,.0,1.0}}; static float q,w,e; static float fq,fw,fe; static GLfloat wa=0,wb=0,wc=0,ba,bb,bc; int flag; void myinit(void) { glClearColor(0.506,.7,1,0.0); glPointSize(2.0); glLoadIdentity(); glOrtho(0.0,499.0,0.0,499.0,-300.0,300.0); } void draw_top_boxes(GLint i,GLint j) { glColor3f(1.0,0.0,0.0); glBegin(GL_POLYGON); glColor3fv(colors[j]); // to draw the boat glVertex2f(v1[0][i+0],v1[1][i+0]); glColor3fv(colors[j+1]); glVertex2f(v1[0][i+1],v1[1][i+1]); glColor3fv(colors[j+2]); glVertex2f(v1[0][i+2],v1[1][i+2]); glColor3fv(colors[j+3]); glVertex2f(v1[0][i+3],v1[1][i+3]); glEnd(); } void draw_polygon(GLint i) { glBegin(GL_POLYGON); // to draw the boat glColor3f(0.0,0.0,0.0); glColor3fv(colors[0]); glVertex2f(v[0][i+0],v[1][i+0]); glColor3fv(colors[1]); glVertex2f(v[0][i+1],v[1][i+1]); glColor3fv(colors[2]); glVertex2f(v[0][i+2],v[1][i+2]); glColor3fv(colors[3]); glVertex2f(v[0][i+3],v[1][i+3]); glEnd(); } void draw_boat() { draw_polygon(0); draw_polygon(4); draw_polygon(8); draw_polygon(12); draw_polygon(16); draw_polygon(20); draw_top_boxes(0,0); draw_top_boxes(4,0); draw_top_boxes(8,0); draw_top_boxes(12,0); glFlush(); glPopMatrix(); glPopMatrix(); } void draw_water() { GLfloat i; GLfloat x=0,y=103,j=0; GLfloat k; glPushMatrix(); glTranslatef(wa,wb,wc); glPushMatrix(); glColor3f(0,0,1); for(k=y;k>0;k-=6) { for(i=1;i<30;i++) { glBegin(GL_LINES); glVertex2f(j,k); glVertex2f(j+10,k); glEnd(); j=j+20; } j=0; } glPopMatrix(); glPopMatrix(); } void draw_fishes() { glPushMatrix(); glTranslatef(fq,12.0,fe); glPushMatrix(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(100,80); glVertex2f(100,60); glVertex2f(85,70); glEnd(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(100,70); glVertex2f(110,75); glVertex2f(110,65); glEnd(); glColor3f(0,0,0); glBegin(GL_POINTS); glVertex2f(90,71); glEnd(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(200,80); glVertex2f(200,60); glVertex2f(185,70); glEnd(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(200,70); glVertex2f(210,75); glVertex2f(210,65); glEnd(); glColor3f(0,0,0); glBegin(GL_POINTS); glVertex2f(190,71); glEnd(); glPopMatrix(); glPopMatrix(); glFlush(); } void draw_cloud() { GLfloat m=100,n=400,o=10; for(int i=0;i<7;i++) { glPushMatrix(); glColor3f(1.0,1.0,1.0); if(i==1) glTranslated(125,415,10); else if(i==3||i==5) glTranslated(m,n+5,o); else glTranslated(m,n,o); glutSolidSphere(20.0,5000,150); glPopMatrix(); m+=10; } } void draw_square() { glColor3f(0,0.5,0.996); glBegin(GL_POLYGON); glVertex2f(0,0); glVertex2f(1000,0); glVertex2f(0,300); glVertex2f(1000,300); glEnd(); glFlush(); } void draw_brotate() { glPushMatrix(); glColor3f(0.96,0.5,0.25); //to draw body of the bird glTranslated(300,400,10); glScalef(3,1,1); glutSolidSphere(6,50000,15); glPopMatrix(); glPushMatrix(); glTranslated(323,400,10); glutSolidSphere(5,50000,15); glPopMatrix(); glColor3f(0,0,0); glBegin(GL_POINTS); glVertex2f(325,401); glEnd(); glColor3f(0.96,0.5,0.25); //to draw wings glBegin(GL_LINES); glVertex2f(294,394); glVertex2f(286,389); glEnd(); glBegin(GL_LINES); glVertex2f(286,389); glVertex2f(295,391); glEnd(); glBegin(GL_LINES); glVertex2f(295,391); glVertex2f(285,385); glEnd(); glBegin(GL_LINES); glVertex2f(285,385); glVertex2f(309,395); glEnd(); glBegin(GL_LINES); glVertex2f(294,406); glVertex2f(286,411); glEnd(); glBegin(GL_LINES); glVertex2f(286,411); glVertex2f(295,409); glEnd(); glBegin(GL_LINES); glVertex2f(295,409); glVertex2f(285,415); glEnd(); glBegin(GL_LINES); glVertex2f(285,415); glVertex2f(309,406); glEnd(); glColor3f(0.96,0.5,0.25); } void draw_bird() { GLfloat x=200,y=400,z=10; draw_brotate(); glBegin(GL_LINES); //draw legs of the bird glVertex2f(285,402); glVertex2f(275,402); glEnd(); glBegin(GL_LINES); glVertex2f(285,398); glVertex2f(275,398); glEnd(); glBegin(GL_LINES); glVertex2f(275,402); glVertex2f(270,405); glEnd(); glBegin(GL_LINES); glVertex2f(275,402); glVertex2f(270,398); glEnd(); glBegin(GL_LINES); glVertex2f(275,398); glVertex2f(273,400); glEnd(); glBegin(GL_LINES); glVertex2f(275,398); glVertex2f(270,395); glEnd(); glBegin(GL_LINES); glVertex2f(323,405); glVertex2f(323,407); glEnd(); glPushMatrix(); glTranslatef(323,409,10); glutSolidSphere(2,200,20); glPopMatrix(); glBegin(GL_TRIANGLES); glVertex2f(328,400); glVertex2f(331,397); glVertex2f(327,398.5); glEnd(); glFlush(); } void drawstars() { glColor3f(1.0,1.0,1.0); glBegin(GL_POINTS); glVertex3f(300.0,400.0,10.0); glVertex3f(200,400.0,10.0); glVertex3f(150,450.0,10.0); glVertex3f(100,470.0,10.0); glVertex3f(50,450.0,10.0); glVertex3f(50,350.0,10.0); glVertex3f(90,365.0,10.0); glVertex3f(350,450.0,10.0); glVertex3f(275,470.0,10.0); glVertex3f(280,430.0,10.0); glVertex3f(250,400.0,10.0); glVertex3f(450,450.0,10.0); glVertex3f(430,430.0,10.0); glVertex3f(430,470.0,10.0); glVertex3f(300,450.0,10.0); glVertex3f(265,380.0,10.0); glVertex3f(235,450.0,10.0); glEnd(); } void draw_all() { glClear(GL_COLOR_BUFFER_BIT); if(flag==0) { glDisable(GL_LIGHTING); //immp one draw_square(); draw_cloud(); glClearColor(0.506,.7,1,0.0); glTranslatef(q,w,e); glPushMatrix(); glColor3f(1.0,0.0,0.0); draw_boat(); draw_fishes(); glPushMatrix(); glColor3f(1.0,1.0,0.0); glTranslated(400,400,10); glutSolidSphere(20.0,5000,150); glPopMatrix(); } if(flag==1) { glDisable(GL_LIGHTING); //imp one draw_square(); draw_cloud(); glClearColor(0.9960,0.7070,0.3164,0.0); glTranslatef(q,w,e); glPushMatrix(); glColor3f(1.0,0.0,0.0); draw_boat(); draw_fishes(); glPushMatrix(); glColor3f(1.0,1.0,0.0); glTranslated(400,400,10); glutSolidSphere(20.0,500,100); glPopMatrix(); } if(flag==2) { // just try and change values in these arrays, specially the position array drawstars(); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); // GLfloat emission[]={0.1,0.1,0.1,0.0}; GLfloat diffuse[] = { 0.40, 0.40,0.40, 1.0 }; GLfloat ambiance[] = { 0.5, 0.5,0.5, 1.0 }; GLfloat specular[] = { 1.3, 1.3,.3, 1.0 }; GLfloat intensity[]={500.0}; GLfloat position[] = { 10,30,-30,1.0 }; glLightfv (GL_LIGHT0, GL_POSITION, position); glLightfv (GL_LIGHT0, GL_DIFFUSE,diffuse); glLightfv (GL_LIGHT0, GL_AMBIENT,ambiance); glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER,GL_TRUE); glLightfv (GL_LIGHT0, GL_SPECULAR,specular); glLightfv (GL_LIGHT0, GL_INTENSITY,intensity); glColor3f(0,0.5,0.996); glBegin(GL_POLYGON); glVertex2f(0,0); glVertex2f(1000,0); glVertex2f(0,150); glVertex2f(1000,150); glEnd(); glTranslatef(q,w,e); glPushMatrix(); glColor3f(1.0,0.0,0.0); draw_boat(); draw_fishes(); glDisable(GL_LIGHTING); glDisable(GL_LIGHT0); draw_cloud(); glClearColor(0.0,0.0,0.0,0.0); glPushMatrix(); glColor3f(1.0,1.0,1.0); glTranslated(400,400,10); glutSolidSphere(20.0,500,100); glPopMatrix(); glColor3f(1.0,1.0,1.0); glBegin(GL_POINTS); glVertex3f(300.0,400.0,10.0); glEnd(); } glPushMatrix(); glTranslatef(ba,bb,bc); glPushMatrix(); draw_bird(); glPopMatrix(); glPopMatrix(); GLfloat i; glPushMatrix(); GLfloat x=0,y=100,j=0; int k; //draw_water(); Sleep(60); q+=5; fq-=3.5; if(q>=440.0) //470 q=-390.0; //400 if(fq<=-300) //500 fq=400.0; //400 wa-=1; if(wa<=(-20)) wa=-0.5; ba+=6; if(ba>=500) ba=-400; glFlush(); glutSwapBuffers(); } void display(void) { draw_all(); } void color_menu(int id) { switch(id) { case 1: flag=0;break; case 2: flag=1;break; case 3: flag=2;break; case 4: exit(0); break; } glutPostRedisplay(); } void main_menu(int id) { switch(id) { case 1: break; case 2:exit(0);break; glutPostRedisplay(); } } int main(int argc,char **argv) { int sub_menu; glutInit(&argc,argv); glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE); glutInitWindowSize(1000,1000); glutInitWindowPosition(0,0); glutCreateWindow("Ship"); sub_menu=glutCreateMenu(color_menu); glutAddMenuEntry("Morning",1); glutAddMenuEntry("Evening",2); glutAddMenuEntry("Night",3); glutAddMenuEntry("Quit",4); glutCreateMenu(main_menu); glutAddSubMenu("View",sub_menu); glutAddMenuEntry("Quit",2); glutAttachMenu(GLUT_RIGHT_BUTTON); glutDisplayFunc(display); glutIdleFunc(display); myinit(); glutMainLoop(); glFlush(); }

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• This code is working properly in Dev C++ .But on Linux platform it is giving problem with the moveme

  - by srinija

  #include<stdio.h> #include<GL/glut.h> #include<stdlib.h> GLfloat v[3][24]={{100.0,300.0,350.0,50.0,100.0,120.0,120.0,100.0,260.0,280.0, 280.0,260.0,140.0,160.0,160.0,140.0,180.0,200.0,200.0,180.0, 220.0,240.0,240.0,220.0},{100.0,100.0,200.0,200.0,160.0, 160.0,180.0,180.0,160.0,160.0,180.0,180.0,160.0,160.0,180.0, 180.0,160.0,160.0,180.0,180.0,160.0,160.0,180.0,180.0}, {1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0, 1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0}}; GLfloat v1[3][16]={{50.0,350.0,350.0,50.0,100.0,300.0,300.0,100.0,125.0,175.0, 175.0,125.0,225.0,275.0,275.0,225.0},{200.0,200.0,210.0, 210.0,210.0,210.0,240.0,240.0,240.0,240.0,310.0,310.0,240.0, 240.0,310.0,310.0},{1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0, 1.0,1.0,1.0,1.0,1.0,1.0}}; GLfloat colors[4][3]={{0.0,0.0,1.0},{0.9961,0.9961,0.65625},{1.0,0.0,1.0}, {1.0,.0,1.0}}; static float q,w,e; static float fq,fw,fe; static GLfloat wa=0,wb=0,wc=0,ba,bb,bc; int flag; void myinit(void) { glClearColor(0.506,.7,1,0.0); glPointSize(2.0); glLoadIdentity(); glOrtho(0.0,499.0,0.0,499.0,-300.0,300.0); } void draw_top_boxes(GLint i,GLint j) { glColor3f(1.0,0.0,0.0); glBegin(GL_POLYGON); glColor3fv(colors[j]); // to draw the boat glVertex2f(v1[0][i+0],v1[1][i+0]); glColor3fv(colors[j+1]); glVertex2f(v1[0][i+1],v1[1][i+1]); glColor3fv(colors[j+2]); glVertex2f(v1[0][i+2],v1[1][i+2]); glColor3fv(colors[j+3]); glVertex2f(v1[0][i+3],v1[1][i+3]); glEnd(); } void draw_polygon(GLint i) { glBegin(GL_POLYGON); // to draw the boat glColor3f(0.0,0.0,0.0); glColor3fv(colors[0]); glVertex2f(v[0][i+0],v[1][i+0]); glColor3fv(colors[1]); glVertex2f(v[0][i+1],v[1][i+1]); glColor3fv(colors[2]); glVertex2f(v[0][i+2],v[1][i+2]); glColor3fv(colors[3]); glVertex2f(v[0][i+3],v[1][i+3]); glEnd(); } void draw_boat() { draw_polygon(0); draw_polygon(4); draw_polygon(8); draw_polygon(12); draw_polygon(16); draw_polygon(20); draw_top_boxes(0,0); draw_top_boxes(4,0); draw_top_boxes(8,0); draw_top_boxes(12,0); glFlush(); glPopMatrix(); glPopMatrix(); } void draw_water() { GLfloat i; GLfloat x=0,y=103,j=0; GLfloat k; glPushMatrix(); glTranslatef(wa,wb,wc); glPushMatrix(); glColor3f(0,0,1); for(k=y;k>0;k-=6) { for(i=1;i<30;i++) { glBegin(GL_LINES); glVertex2f(j,k); glVertex2f(j+10,k); glEnd(); j=j+20; } j=0; } glPopMatrix(); glPopMatrix(); } void draw_fishes() { glPushMatrix(); glTranslatef(fq,12.0,fe); glPushMatrix(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(100,80); glVertex2f(100,60); glVertex2f(85,70); glEnd(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(100,70); glVertex2f(110,75); glVertex2f(110,65); glEnd(); glColor3f(0,0,0); glBegin(GL_POINTS); glVertex2f(90,71); glEnd(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(200,80); glVertex2f(200,60); glVertex2f(185,70); glEnd(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(200,70); glVertex2f(210,75); glVertex2f(210,65); glEnd(); glColor3f(0,0,0); glBegin(GL_POINTS); glVertex2f(190,71); glEnd(); glPopMatrix(); glPopMatrix(); glFlush(); } void draw_cloud() { GLfloat m=100,n=400,o=10; for(int i=0;i<7;i++) { glPushMatrix(); glColor3f(1.0,1.0,1.0); if(i==1) glTranslated(125,415,10); else if(i==3||i==5) glTranslated(m,n+5,o); else glTranslated(m,n,o); glutSolidSphere(20.0,5000,150); glPopMatrix(); m+=10; } } void draw_square() { glColor3f(0,0.5,0.996); glBegin(GL_POLYGON); glVertex2f(0,0); glVertex2f(1000,0); glVertex2f(0,300); glVertex2f(1000,300); glEnd(); glFlush(); } void draw_brotate() { glPushMatrix(); glColor3f(0.96,0.5,0.25); //to draw body of the bird glTranslated(300,400,10); glScalef(3,1,1); glutSolidSphere(6,50000,15); glPopMatrix(); glPushMatrix(); glTranslated(323,400,10); glutSolidSphere(5,50000,15); glPopMatrix(); glColor3f(0,0,0); glBegin(GL_POINTS); glVertex2f(325,401); glEnd(); glColor3f(0.96,0.5,0.25); //to draw wings glBegin(GL_LINES); glVertex2f(294,394); glVertex2f(286,389); glEnd(); glBegin(GL_LINES); glVertex2f(286,389); glVertex2f(295,391); glEnd(); glBegin(GL_LINES); glVertex2f(295,391); glVertex2f(285,385); glEnd(); glBegin(GL_LINES); glVertex2f(285,385); glVertex2f(309,395); glEnd(); glBegin(GL_LINES); glVertex2f(294,406); glVertex2f(286,411); glEnd(); glBegin(GL_LINES); glVertex2f(286,411); glVertex2f(295,409); glEnd(); glBegin(GL_LINES); glVertex2f(295,409); glVertex2f(285,415); glEnd(); glBegin(GL_LINES); glVertex2f(285,415); glVertex2f(309,406); glEnd(); glColor3f(0.96,0.5,0.25); } void draw_bird() { GLfloat x=200,y=400,z=10; draw_brotate(); glBegin(GL_LINES); //draw legs of the bird glVertex2f(285,402); glVertex2f(275,402); glEnd(); glBegin(GL_LINES); glVertex2f(285,398); glVertex2f(275,398); glEnd(); glBegin(GL_LINES); glVertex2f(275,402); glVertex2f(270,405); glEnd(); glBegin(GL_LINES); glVertex2f(275,402); glVertex2f(270,398); glEnd(); glBegin(GL_LINES); glVertex2f(275,398); glVertex2f(273,400); glEnd(); glBegin(GL_LINES); glVertex2f(275,398); glVertex2f(270,395); glEnd(); glBegin(GL_LINES); glVertex2f(323,405); glVertex2f(323,407); glEnd(); glPushMatrix(); glTranslatef(323,409,10); glutSolidSphere(2,200,20); glPopMatrix(); glBegin(GL_TRIANGLES); glVertex2f(328,400); glVertex2f(331,397); glVertex2f(327,398.5); glEnd(); glFlush(); } void drawstars() { glColor3f(1.0,1.0,1.0); glBegin(GL_POINTS); glVertex3f(300.0,400.0,10.0); glVertex3f(200,400.0,10.0); glVertex3f(150,450.0,10.0); glVertex3f(100,470.0,10.0); glVertex3f(50,450.0,10.0); glVertex3f(50,350.0,10.0); glVertex3f(90,365.0,10.0); glVertex3f(350,450.0,10.0); glVertex3f(275,470.0,10.0); glVertex3f(280,430.0,10.0); glVertex3f(250,400.0,10.0); glVertex3f(450,450.0,10.0); glVertex3f(430,430.0,10.0); glVertex3f(430,470.0,10.0); glVertex3f(300,450.0,10.0); glVertex3f(265,380.0,10.0); glVertex3f(235,450.0,10.0); glEnd(); } void draw_all() { glClear(GL_COLOR_BUFFER_BIT); if(flag==0) { glDisable(GL_LIGHTING); //immp one draw_square(); draw_cloud(); glClearColor(0.506,.7,1,0.0); glTranslatef(q,w,e); glPushMatrix(); glColor3f(1.0,0.0,0.0); draw_boat(); draw_fishes(); glPushMatrix(); glColor3f(1.0,1.0,0.0); glTranslated(400,400,10); glutSolidSphere(20.0,5000,150); glPopMatrix(); } if(flag==1) { glDisable(GL_LIGHTING); //imp one draw_square(); draw_cloud(); glClearColor(0.9960,0.7070,0.3164,0.0); glTranslatef(q,w,e); glPushMatrix(); glColor3f(1.0,0.0,0.0); draw_boat(); draw_fishes(); glPushMatrix(); glColor3f(1.0,1.0,0.0); glTranslated(400,400,10); glutSolidSphere(20.0,500,100); glPopMatrix(); } if(flag==2) { // just try and change values in these arrays, specially the position array drawstars(); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); // GLfloat emission[]={0.1,0.1,0.1,0.0}; GLfloat diffuse[] = { 0.40, 0.40,0.40, 1.0 }; GLfloat ambiance[] = { 0.5, 0.5,0.5, 1.0 }; GLfloat specular[] = { 1.3, 1.3,.3, 1.0 }; GLfloat intensity[]={500.0}; GLfloat position[] = { 10,30,-30,1.0 }; glLightfv (GL_LIGHT0, GL_POSITION, position); glLightfv (GL_LIGHT0, GL_DIFFUSE,diffuse); glLightfv (GL_LIGHT0, GL_AMBIENT,ambiance); glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER,GL_TRUE); glLightfv (GL_LIGHT0, GL_SPECULAR,specular); glLightfv (GL_LIGHT0, GL_INTENSITY,intensity); glColor3f(0,0.5,0.996); glBegin(GL_POLYGON); glVertex2f(0,0); glVertex2f(1000,0); glVertex2f(0,150); glVertex2f(1000,150); glEnd(); glTranslatef(q,w,e); glPushMatrix(); glColor3f(1.0,0.0,0.0); draw_boat(); draw_fishes(); glDisable(GL_LIGHTING); glDisable(GL_LIGHT0); draw_cloud(); glClearColor(0.0,0.0,0.0,0.0); glPushMatrix(); glColor3f(1.0,1.0,1.0); glTranslated(400,400,10); glutSolidSphere(20.0,500,100); glPopMatrix(); glColor3f(1.0,1.0,1.0); glBegin(GL_POINTS); glVertex3f(300.0,400.0,10.0); glEnd(); } glPushMatrix(); glTranslatef(ba,bb,bc); glPushMatrix(); draw_bird(); glPopMatrix(); glPopMatrix(); GLfloat i; glPushMatrix(); GLfloat x=0,y=100,j=0; int k; //draw_water(); q+=25; fq-=3.5; if(q>=440.0) //470 q=-390.0; //400 if(fq<=-300) //500 fq=400.0; //400 wa-=1; if(wa<=(-20)) wa=-0.5; ba+=6; if(ba>=500) ba=-400; glFlush(); glutSwapBuffers(); } void display(void) { draw_all(); } void color_menu(int id) { switch(id) { case 1: flag=0;break; case 2: flag=1;break; case 3: flag=2;break; case 4: exit(0); break; } glutPostRedisplay(); } void main_menu(int id) { switch(id) { case 1: break; case 2:exit(0);break; glutPostRedisplay(); } } int main(int argc,char **argv) { int sub_menu; glutInit(&argc,argv); glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE); glutInitWindowSize(1000,1000); glutInitWindowPosition(0,0); glutCreateWindow("Ship"); sub_menu=glutCreateMenu(color_menu); glutAddMenuEntry("Morning",1); glutAddMenuEntry("Evening",2); glutAddMenuEntry("Night",3); glutAddMenuEntry("Quit",4); glutCreateMenu(main_menu); glutAddSubMenu("View",sub_menu); glutAddMenuEntry("Quit",2); glutAttachMenu(GLUT_RIGHT_BUTTON); glutDisplayFunc(display); glutIdleFunc(display); myinit(); glutMainLoop(); glFlush(); }

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• Oracle 9i Session Disconnections

  - by mlaverd

  I am in a development environment, and our test Oracle 9i server has been misbehaving for a few days now. What happens is that we have our JDBC connections disconnecting after a few successful connections. We got this box set up by our IT department and handed over to. It is 'our problem', so options like 'ask you DBA' isn't going to help me. :( Our server is set up with 3 plain databases (one is the main dev db, the other is the 'experimental' dev db). We use the Oracle 10 ojdbc14.jar thin JDBC driver (because of some bug in the version 9 of the driver). We're using Hibernate to talk to the DB. The only thing that I can see that changed is that we now have more users connecting to the server. Instead of one developer, we now have 3. With the Hibernate connection pools, I'm thinking that maybe we're hitting some limit? Anyone has any idea what's going on? Here's the stack trace on the client: Caused by: org.hibernate.exception.GenericJDBCException: could not execute query at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126) [hibernate3.jar:na] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114) [hibernate3.jar:na] at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) [hibernate3.jar:na] at org.hibernate.loader.Loader.doList(Loader.java:2235) [hibernate3.jar:na] at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2129) [hibernate3.jar:na] at org.hibernate.loader.Loader.list(Loader.java:2124) [hibernate3.jar:na] at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401) [hibernate3.jar:na] at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363) [hibernate3.jar:na] at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196) [hibernate3.jar:na] at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1149) [hibernate3.jar:na] at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102) [hibernate3.jar:na] ... Caused by: java.sql.SQLException: Io exception: Connection reset at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:829) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1049) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:854) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1154) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3370) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3415) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208) [hibernate3.jar:na] at org.hibernate.loader.Loader.getResultSet(Loader.java:1812) [hibernate3.jar:na] at org.hibernate.loader.Loader.doQuery(Loader.java:697) [hibernate3.jar:na] at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) [hibernate3.jar:na] at org.hibernate.loader.Loader.doList(Loader.java:2232) [hibernate3.jar:na]

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• How to know the source of certain TCP traffic on AIX

  - by A.Rashad

  We have two AIX boxes, one for production system and another for testing. both systems are running ATM machine switches, where the ATM device is connected via TCP socket. we had an issue on production system where the machine would power off or get disconnected but the netstat -na | grep <IP of machine > would still mention that the socket is up when simulated that case on the UAT environment, the problem did not happen, where the socket would terminate in 3 to 5 minutes. when sniffed on the traffic between the machine and ATM we found that no traffic takes place on production while there is some sort of heartbeat on UAT. but it is not initiated by the application. $>tcpdump | grep -v "10.2.2.71" | grep -v "HSRP" | grep "10.3.1.30" tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on en6, link-type 1, capture size 96 bytes 09:08:13.323421 IP server073.afs3-callback > 10.3.1.30.impera: . 278204201:278204202(1) ack 3307884029 win 164 09:08:13.335334 IP 10.3.1.30.impera > server073.afs3-callback: . ack 1 win 64180 09:08:23.425771 IP 10.3.1.30.impera > server073.afs3-callback: . 1:2(1) ack 1 win 64180 09:08:23.425789 IP server073.afs3-callback > 10.3.1.30.impera: . ack 2 win 65535 09:09:13.628985 IP server073.afs3-callback > 10.3.1.30.impera: . 0:1(1) ack 1 win 164 09:09:13.633900 IP 10.3.1.30.impera > server073.afs3-callback: . ack 1 win 64180 09:09:23.373634 IP 10.3.1.30.impera > server073.afs3-callback: . 1:2(1) ack 1 win 64180 09:09:23.373647 IP server073.afs3-callback > 10.3.1.30.impera: . ack 2 win 65535 while on production, that traffic is not there. we want to know where this traffic is initiated from to implement on production to sense disconnection our comms parameters are: tcp_keepcnt = 2 tcp_keepidle = 100 tcp_keepinit = 150 tcp_keepintvl = 150 tcp_finwait2 = 1200 can anyone help? Editing Question: One point I missed because I was rushing to a meeting. the difference between the Production and UAT in setup is that in Production we have an application called F5 working as load balancer between the ATMs and the AIX box, while it is a direct connection through MPLS in case of UAT. note: we had one MPLS and one GPRS connected ATMs on UAT, and both connections terminated when unplugged in about 4 minutes Edit 2 the no -o tcp_timewait command returns 1 in both Production and UAT

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• how to upgrade OSX?

  - by abc

  i have 10.5.8 OS X rite now.. i want it to be 10.6.3 .. i have downloaded the update but its ttelling u need 10.6 to update to 10.6.3 ] ] so how to update from 10.5.8 to 10.6.3 ?

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• How to specify what network interface to use with TTCP or IPERF?

  - by Sammy

  The PC has two Gigabit Ethernet ports. They function as two separate network adapters. I'm trying to do a simple loopback test between the two. I've tried TTCP and IPERF. They're giving me hard time because I'm using the same physical PC. Using pcattcp... On the receiver end: C:\PCATTCP-0114>pcattcp -r PCAUSA Test TCP Utility V2.01.01.14 (IPv4/IPv6) IP Version : IPv4 Started TCP Receive Test 0... TCP Receive Test Local Host : GIGA ************** Listening...: On TCPv4 0.0.0.0:5001 Accept : TCPv4 0.0.0.0:5001 <- 10.1.1.1:33904 Buffer Size : 8192; Alignment: 16384/0 Receive Mode: Sinking (discarding) Data Statistics : TCPv4 0.0.0.0:5001 <- 10.1.1.1:33904 16777216 bytes in 0.076 real seconds = 215578.95 KB/sec +++ numCalls: 2052; msec/call: 0.038; calls/sec: 27000.000 C:\PCATTCP-0114> On the transmitter end: C:\PCATTCP-0114>PCATTCP.exe -t 10.1.1.1 PCAUSA Test TCP Utility V2.01.01.14 (IPv4/IPv6) IP Version : IPv4 Started TCP Transmit Test 0... TCP Transmit Test Transmit : TCPv4 0.0.0.0 -> 10.1.1.1:5001 Buffer Size : 8192; Alignment: 16384/0 TCP_NODELAY : DISABLED (0) Connect : Connected to 10.1.1.1:5001 Send Mode : Send Pattern; Number of Buffers: 2048 Statistics : TCPv4 0.0.0.0 -> 10.1.1.1:5001 16777216 bytes in 0.075 real seconds = 218453.33 KB/sec +++ numCalls: 2048; msec/call: 0.037; calls/sec: 27306.667 C:\PCATTCP-0114> It's responding alright. But why does it say 0.0.0.0? Is it passing through only one of the network adapters? I want 10.1.1.1 to be the server (receiver) and 10.1.1.2 to be the client (transmitter). These are the IP addresses assigned manually to each network adapter. How do I specify these addresses in TTCP? There is also the IPERF tool which has the -B option. Unfortunately I've been only able to use this option to bind the server to the 10.1.1.1 address. I was unable to bind the client to the 10.1.1.2 address. I might be doing it wrong. Can the -B option be used for both the server as well as the client side? What does the syntax look like for the client?

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• Unable to start rabbitmq-server on Ubuntu 12.04

  - by lxyu

  I try to install rabbitmq-server on ubuntu-server 12.04 but failed. Then I add the apt source list following the guide in http://www.rabbitmq.com/install-debian.html But reinstall still have the same error as following: $ sudo aptitude install rabbitmq-server ... Setting up rabbitmq-server (2.8.7-1) ... * Starting message broker rabbitmq-server * FAILED - check /var/log/rabbitmq/startup_\{log, _err\} ...fail! invoke-rc.d: initscript rabbitmq-server, action "start" failed. dpkg: error processing rabbitmq-server (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for libc-bin ... ldconfig deferred processing now taking place Errors were encountered while processing: rabbitmq-server E: Sub-process /usr/bin/dpkg returned an error code (1) A package failed to install. Trying to recover: Setting up rabbitmq-server (2.8.7-1) ... * Starting message broker rabbitmq-server * FAILED - check /var/log/rabbitmq/startup_\{log, _err\} ...fail! invoke-rc.d: initscript rabbitmq-server, action "start" failed. dpkg: error processing rabbitmq-server (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: rabbitmq-server And error log seems show nothing useful neither: # startup_err shows this Crash dump was written to: erl_crash.dump Kernel pid terminated (application_controller) ({application_start_failure,kernel,{shutdown,{kernel,start,[normal,[]]}}}) # startup_log shows this {error_logger,{{2012,10,10},{22,31,54}},"Protocol: ~p: register error: ~p~n",["inet_tcp",{{badmatch,{error,epmd_close}},[{inet_tcp_dist,listen,1},{net_kernel,start_protos,4},{net_kernel,start_protos,3},{net_kernel,init_node,2},{net_kernel,init,1},{gen_server,init_it,6},{proc_lib,init_p_do_apply,3}]}]} {error_logger,{{2012,10,10},{22,31,54}},crash_report,[[{initial_call,{net_kernel,init,['Argument__1']}},{pid,<0.20.0>},{registered_name,[]},{error_info,{exit,{error,badarg},[{gen_server,init_it,6},{proc_lib,init_p_do_apply,3}]}},{ancestors,[net_sup,kernel_sup,<0.9.0>]},{messages,[]},{links,[#Port<0.90>,<0.17.0>]},{dictionary,[{longnames,false}]},{trap_exit,true},{status,running},{heap_size,610},{stack_size,24},{reductions,511}],[]]} {error_logger,{{2012,10,10},{22,31,54}},supervisor_report,[{supervisor,{local,net_sup}},{errorContext,start_error},{reason,{'EXIT',nodistribution}},{offender,[{pid,undefined},{name,net_kernel},{mfargs,{net_kernel,start_link,[[rabbitmqprelaunch18417,shortnames]]}},{restart_type,permanent},{shutdown,2000},{child_type,worker}]}]} {error_logger,{{2012,10,10},{22,31,54}},supervisor_report,[{supervisor,{local,kernel_sup}},{errorContext,start_error},{reason,shutdown},{offender,[{pid,undefined},{name,net_sup},{mfargs,{erl_distribution,start_link,[]}},{restart_type,permanent},{shutdown,infinity},{child_type,supervisor}]}]} {error_logger,{{2012,10,10},{22,31,54}},std_info,[{application,kernel},{exited,{shutdown,{kernel,start,[normal,[]]}}},{type,permanent}]} {"Kernel pid terminated",application_controller,"{application_start_failure,kernel,{shutdown,{kernel,start,[normal,[]]}}}"} I have googled for some time but got nothing useful. One solution on the internet is to make sure hostname pingable, but my /etc/hosts already have this line on top: 127.0.0.1 localhost myserver Any suggestion on how to get up rabbitmq-server?

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• How do I combine static and dynamic DHCP leases on a Cisco router?

  - by Brad

  Basically, what I need is super similar to the unanswered cisco forum question below: https://supportforums.cisco.com/message/3139749#3139749 I have a Cisco 850 Series router. I have configured a DHCP pool for the 10.0.0.0/24 network. I have excluded 10.0.0.1 - 10.0.0.99 from the DHCP pool. I want to add a static DHCP pool for stuff and I want DHCP to statically assign them the addresses of my choice below 100. Actually, I don't care what addresses I statically assign. They can be anything in the pool for all I care, I just want it to work. Why are you doing this? Just statically assign the IPs on the devices! I don't want to do this because I have some laptop users. They could obviously only use that static IP here. This isn't a problem if they could be bothered to change any location setting or something. They can't. So it HAS to be DHCP. It also has to be static IPs because I need to forward ports to them. I know, I know, this is weird but it's an apartment LAN/WLAN so this isn't exactly a typical use case. Relevant sections of config below: ip dhcp excluded-address 10.0.0.1 10.0.0.99 ! ip dhcp pool Internal-net import all network 10.0.0.0 255.255.255.0 default-router 10.0.0.1 domain-name 1770.local lease 7 ! ip dhcp pool static-pool import all origin file flash://staticmap default-router 10.0.0.1 domain-name 1770.local Contents of staticmap: *time* Aug 5 2010 09:00 AM *version* 2 !IP address Type Hardware address Lease expiration 10.0.0.100/24 1 001f.5b3e.d50a Infinite *end* You can see here I was trying addresses outside the excluded-address range to see if that would make any difference. My testing machine's MAC: mainframe:~ brad$ ifconfig en1 en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether 00:1f:5b:3e:d5:0a What shows up in the DHCP binding table: basestar#show ip dhcp binding Bindings from all pools not associated with VRF: IP address Client-ID/ Lease expiration Type Hardware address/ User name 10.0.0.112 0100.1f5b.3ed5.0a Aug 12 2010 10:06 AM Automatic What's up with the funny looking MAC in the DHCP binding table?? Is what I'm trying to accomplish basically impossible? Am I going about this the wrong way? All I want to to be able to port forward some ports to specific devices. The way I would do this with a consumer router is to do what I'm trying to do here; assign static DHCP to those devices then configure PAT for ports on those addresses.

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• How to know the source of certain TCP traffic on AIX

  - by A.Rashad

  We have two AIX boxes, one for production system and another for testing. both systems are running ATM machine switches, where the ATM device is connected via TCP socket. we had an issue on production system where the machine would power off or get disconnected but the netstat -na | grep <IP of machine > would still mention that the socket is up when simulated that case on the UAT environment, the problem did not happen, where the socket would terminate in 3 to 5 minutes. when sniffed on the traffic between the machine and ATM we found that no traffic takes place on production while there is some sort of heartbeat on UAT. but it is not initiated by the application. $>tcpdump | grep -v "10.2.2.71" | grep -v "HSRP" | grep "10.3.1.30" tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on en6, link-type 1, capture size 96 bytes 09:08:13.323421 IP server073.afs3-callback > 10.3.1.30.impera: . 278204201:278204202(1) ack 3307884029 win 164 09:08:13.335334 IP 10.3.1.30.impera > server073.afs3-callback: . ack 1 win 64180 09:08:23.425771 IP 10.3.1.30.impera > server073.afs3-callback: . 1:2(1) ack 1 win 64180 09:08:23.425789 IP server073.afs3-callback > 10.3.1.30.impera: . ack 2 win 65535 09:09:13.628985 IP server073.afs3-callback > 10.3.1.30.impera: . 0:1(1) ack 1 win 164 09:09:13.633900 IP 10.3.1.30.impera > server073.afs3-callback: . ack 1 win 64180 09:09:23.373634 IP 10.3.1.30.impera > server073.afs3-callback: . 1:2(1) ack 1 win 64180 09:09:23.373647 IP server073.afs3-callback > 10.3.1.30.impera: . ack 2 win 65535 while on production, that traffic is not there. we want to know where this traffic is initiated from to implement on production to sense disconnection our comms parameters are: tcp_keepcnt = 2 tcp_keepidle = 100 tcp_keepinit = 150 tcp_keepintvl = 150 tcp_finwait2 = 1200 can anyone help?

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