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  • Code Design Process?

    - by user156814
    I am going to be working on a project, a web application. I was reading 37signals getting real pamphlet online (http://gettingreal.37signals.com/), and I understand the recommended process to build the entire website. Brainstorm, sketch, HTML, code. They touch on each process lightly, but they never really talk much about the coding process (all they say is to keep code lean). I've been reading about different ways to go about it (top to bottom, bottom to top) but I dont know much about each way. I even read somewhere that one should write tests for the code before they actually write the code??? WHAT? What coding process should one follow when building an application. if its necessary, I'm using PHP and a framework.

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  • Why does use of H264 in sender/receiver pipelines introduce just HUGE delay?

    - by Serguey Zefirov
    When I try to create pipeline that uses H264 to transmit video, I get some enormous delay, up to 10 seconds to transmit video from my machine to... my machine! This is unacceptable for my goals and I'd like to consult StackOverflow over what I (or someone else) do wrong. I took pipelines from gstrtpbin documentation page and slightly modified them to use Speex: This is sender pipeline: #!/bin/sh gst-launch -v gstrtpbin name=rtpbin \ v4l2src ! ffmpegcolorspace ! ffenc_h263 ! rtph263ppay ! rtpbin.send_rtp_sink_0 \ rtpbin.send_rtp_src_0 ! udpsink host=127.0.0.1 port=5000 \ rtpbin.send_rtcp_src_0 ! udpsink host=127.0.0.1 port=5001 sync=false async=false \ udpsrc port=5005 ! rtpbin.recv_rtcp_sink_0 \ pulsesrc ! audioconvert ! audioresample ! audio/x-raw-int,rate=16000 ! \ speexenc bitrate=16000 ! rtpspeexpay ! rtpbin.send_rtp_sink_1 \ rtpbin.send_rtp_src_1 ! udpsink host=127.0.0.1 port=5002 \ rtpbin.send_rtcp_src_1 ! udpsink host=127.0.0.1 port=5003 sync=false async=false \ udpsrc port=5007 ! rtpbin.recv_rtcp_sink_1 Receiver pipeline: !/bin/sh gst-launch -v\ gstrtpbin name=rtpbin \ udpsrc caps="application/x-rtp,media=(string)video, clock-rate=(int)90000, encoding-name=(string)H263-1998" \ port=5000 ! rtpbin.recv_rtp_sink_0 \ rtpbin. ! rtph263pdepay ! ffdec_h263 ! xvimagesink \ udpsrc port=5001 ! rtpbin.recv_rtcp_sink_0 \ rtpbin.send_rtcp_src_0 ! udpsink port=5005 sync=false async=false \ udpsrc caps="application/x-rtp,media=(string)audio, clock-rate=(int)16000, encoding-name=(string)SPEEX, encoding-params=(string)1, payload=(int)110" \ port=5002 ! rtpbin.recv_rtp_sink_1 \ rtpbin. ! rtpspeexdepay ! speexdec ! audioresample ! audioconvert ! alsasink \ udpsrc port=5003 ! rtpbin.recv_rtcp_sink_1 \ rtpbin.send_rtcp_src_1 ! udpsink host=127.0.0.1 port=5007 sync=false async=false Those pipelines, a combination of H263 and Speex, work fine enough. I snap my fingers near camera and micropohne and then I see movement and hear sound at the same time. Then I changed pipelines to use H264 along the video path. The sender becomes: #!/bin/sh gst-launch -v gstrtpbin name=rtpbin \ v4l2src ! ffmpegcolorspace ! x264enc bitrate=300 ! rtph264pay ! rtpbin.send_rtp_sink_0 \ rtpbin.send_rtp_src_0 ! udpsink host=127.0.0.1 port=5000 \ rtpbin.send_rtcp_src_0 ! udpsink host=127.0.0.1 port=5001 sync=false async=false \ udpsrc port=5005 ! rtpbin.recv_rtcp_sink_0 \ pulsesrc ! audioconvert ! audioresample ! audio/x-raw-int,rate=16000 ! \ speexenc bitrate=16000 ! rtpspeexpay ! rtpbin.send_rtp_sink_1 \ rtpbin.send_rtp_src_1 ! udpsink host=127.0.0.1 port=5002 \ rtpbin.send_rtcp_src_1 ! udpsink host=127.0.0.1 port=5003 sync=false async=false \ udpsrc port=5007 ! rtpbin.recv_rtcp_sink_1 And receiver becomes: #!/bin/sh gst-launch -v\ gstrtpbin name=rtpbin \ udpsrc caps="application/x-rtp,media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264" \ port=5000 ! rtpbin.recv_rtp_sink_0 \ rtpbin. ! rtph264depay ! ffdec_h264 ! xvimagesink \ udpsrc port=5001 ! rtpbin.recv_rtcp_sink_0 \ rtpbin.send_rtcp_src_0 ! udpsink port=5005 sync=false async=false \ udpsrc caps="application/x-rtp,media=(string)audio, clock-rate=(int)16000, encoding-name=(string)SPEEX, encoding-params=(string)1, payload=(int)110" \ port=5002 ! rtpbin.recv_rtp_sink_1 \ rtpbin. ! rtpspeexdepay ! speexdec ! audioresample ! audioconvert ! alsasink \ udpsrc port=5003 ! rtpbin.recv_rtcp_sink_1 \ rtpbin.send_rtcp_src_1 ! udpsink host=127.0.0.1 port=5007 sync=false async=false This is what happen under Ubuntu 10.04. I didn't noticed such huge delays on Ubuntu 9.04 - the delays there was in range 2-3 seconds, AFAIR.

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  • Exception when programmatically copying content type

    - by BeraCim
    Hi all: I'm getting exceptions when copying content type from one web to another: foreach (SPContentType destinationWebCt in destinationWeb.ContentTypes) { destinationWeb.ContentTypes.Add(existingWebCt); destinationWeb.Update(); } existingWebCt is the content type from another web e.g. /Site/Web. destinationWeb is the web that I wish to copy the content type to e.g. /Site/DestinationWeb. I got the SPException that says something like content type can not be added outside of its scope. Then I decided to replace all "ContentTypes" to "AvailableContentTypes", but then I got the SPException saying this collcetion could not be modified. So how can I copy a content type to another web? Thanks.

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  • save managed bean to notes document

    - by Ove Stoerholt
    In a managed bean you have fields, and the fields have getters and setters. But I also need to save values back to, in this case, a Notes profile document. So I have a loadProfileDocument and a saveProfileDocument method. I was thinking of using the bean in the application scope. How do I make sure the profile document is saved? Do I have to call the saveProfileDocument from the setter? Do I call the saveProfileDocument() explisitly? Could I use a destructor (finalize)? Or what...???...

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  • What are the characteristics of spaghetti code?

    - by justjoe
    Somebody said that when your PHP Code and application use global variable then it must be a spaghetti code (i assume this). I use wordpress a lot. As far as i know, it's the best thing near a great php software. And it use many global variables to interact between its components. but forget about that, cause frankly, that's the only thing i know. so it's completely biased ;D so just curious, What is the characteristic of spaghetti code ? ps : the only thing i know is wordpress. so, Hopefully, maybe this will help somebody give great answer for somebody who have a little experience on developing full web application on PHP (for example, stack-overflow website)

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  • JBOSS V/s appache tomcat

    - by DEE
    Hi There, i am new to "java world" , i need following clarification when to use JBOSS v/s TOMCAT ? differences? which is more reliable ? which is more scalable? which is more easy to to administrate? does both have scale out options? can i host an application developed in flex on JBOSS/TOMCAT? my application would be simple 3-tier with Servlets , so given this which is the best option. any comments/suggestions Thanks in advance DEE

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  • Why JPA injection not works on @PersistentUnit

    - by Dewfy
    Hello colleagues! It is continues of question ( http://stackoverflow.com/questions/2570976/struts-2-bean-is-not-created ) I'm using struts2 + toplink in my very simple web application under Tomcat. On the page I would like use iteration tag. That is why I've declared some factory (SomeFactory) that resolves collection of entities (Entity). Per article: http://download-uk.oracle.com/docs/cd/B32110_01/web.1013/b28221/usclient005.htm#CIHCEHHG the only thing I need is declaration: @PersistenceContext(unitName="name_in_persistence_xml") public class SomeFactory { @PersistenceUnit(unitName="name_in_persistence_xml") EntityManagerFactory emf; public EntityManager getEntityManager() { assert(emf != null); //HERE every time it is null return emf.createEntityManager(); } public Collection<Entity> getAll() { return getEntityManager().createNamedQuery("Entity.findAll").getResultList(); } } What is wrong? May be i miss something in web.xml? How to pre-init toplink for web application to allow injection happen?

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  • WPF windows locked when calling webservice. Even when run asynchronously

    - by SumGuy
    Hi there. I'm having a big problem when calling a web service from my WPF application. The application/window locks until the process has completed. I've attempted to run this asynchronously but the problem still persists. Currently, the web service call I'm making can last 45-60 seconds. It runs a process on the server to fetch a big chunk of data. As it take a little while I wanted to have a progress bar moving indeterminately for the user to see that the application hasn't stalled or anything (you know how impatatient they get). So: private void btnSelect_Click(object sender, RoutedEventArgs e) { wDrawingList = new WindowDrawingList(systemManager); AsyncMethodHandler caller = default(AsyncMethodHandler); caller = new AsyncMethodHandler(setupDrawingList); // open new thread with callback method caller.BeginInvoke((Guid)((Button)sender).Tag, MyAsyncCallback, null); } Click a button and the app will create the form that the async stuff will be posted to and set up the async stuff calling the async method. public bool setupDrawingList(Guid ID) { if (systemManager.set(ID)) { wDrawingList.Dispatcher.Invoke(DispatcherPriority.Background, new Action(() => { wDrawingList.ShowForm(); Hide(); })); return true; } return false; } This is the async method. The showForm method contains the calls to setup the new form including the monster web service call public void MyAsyncCallback(IAsyncResult ar) { // Because you passed your original delegate in the asyncState parameter of the Begin call, you can get it back here to complete the call. MethodDelegate dlgt = (MethodDelegate)ar.AsyncState; // Complete the call. bool output = dlgt.EndInvoke(ar); try { // Retrieve the delegate. AsyncResult result = (AsyncResult)ar; AsyncMethodHandler caller = (AsyncMethodHandler)result.AsyncDelegate; // Because this method is running from secondary thread it can never access ui objects because they are created // on the primary thread. // Call EndInvoke to retrieve the results. bool returnValue = caller.EndInvoke(ar); // Still on secondary thread, must update ui on primary thread UpdateUI(returnValue == true ? "Success" : "Failed"); } catch (Exception ex) { string exMessage = null; exMessage = "Error: " + ex.Message; UpdateUI(exMessage); } } public void UpdateUI(string outputValue) { // Get back to primary thread to update ui UpdateUIHandler uiHandler = new UpdateUIHandler(UpdateUIIndicators); string results = outputValue; // Run new thread off Dispatched (primary thread) this.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal, uiHandler, results); } public void UpdateUIIndicators(string outputValue) { // update user interface controls from primary UI thread sbi3.Content = "Processing Completed."; } Any help or theories are appreciated. I'm at a loss. Thanks in advance

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  • Something like a manual refresh is needed angularjs, and a $digest() iterations error

    - by Tony Ennis
    (post edited again, new comments follow this line) I'm changing the title of this posting since it was misleading - I was trying to fix a symptom. I was unable to figure out why the code was breaking with a $digest() iterations error. A plunk of my code worked fine. I was totally stuck, so I decided to make my code a little more Angular-like. One anti-pattern I had implemented was to hide my model behind my controller by adding getters/setters to the controller. I tore all that out and instead put the model into the $scope since I had read that was proper Angular. To my surprise, the $digest() iterations error went away. I do not exactly know why and I do not have the intestinal fortitude to put the old code back and figure it out. I surmise that by involving the controller in the get/put of the data I added a dependency under the hood. I do not understand it. edit #2 ends here. (post edited, see EDIT below) I was working through my first Error: 10 $digest() iterations reached. Aborting! error today. I solved it this way: <div ng-init="lineItems = ctrl.getLineItems()"> <tr ng-repeat="r in lineItems"> <td>{{r.text}}</td> <td>...</td> <td>{{r.price | currency}}</td> </tr </div> Now a new issue has arisen - the line items I'm producing can be modified by another control on the page. It's a text box for a promo code. The promo code adds a discount to the lineItem array. It would show up if I could ng-repeat over ctrl.getLineItems(). Since the ng-repeat is looking at a static variable, not the actual model, it doesn't see that the real line items have changed and thus the promotional discount doesn't get displayed until I refresh the browser. Here's the HTML for the promo code: <input type="text" name="promo" ng-model="ctrl.promoCode"/> <button ng-click="ctrl.applyPromoCode()">apply promo code</button> The input tag is writing the value to the model. The bg-click in the button is invoking a function that will apply the code. This could change the data behind the lineItems. I have been advised to use $scope.apply(...). However, since this is applied as a matter of course by ng-click is isn't going to do anything. Indeed, if I add it to ctrl.applyPromoCode(), I get an error since an .apply() is already in progress. I'm at a loss. EDIT The issue above is probably the result of me fixing of symptom, not a problem. Here is the original HTML that was dying with the 10 $digest() iterations error. <table> <tr ng-repeat="r in ctrl.getLineItems()"> <td>{{r.text}}</td> <td>...</td> <td>{{r.price | currency}}</td> </tr> </table> The ctrl.getLineItems() function doesn't do much but invoke a model. I decided to keep the model out of the HTML as much as I could. this.getLineItems = function() { var total = 0; this.lineItems = []; this.lineItems.push({text:"Your quilt will be "+sizes[this.size].block_size+" squares", price:sizes[this.size].price}); total = sizes[this.size].price; this.lineItems.push({text: threads[this.thread].narrative, price:threads[this.thread].price}); total = total + threads[this.thread].price; if (this.sashing) { this.lineItems.push({text:"Add sashing", price: this.getSashingPrice()}); total = total + sizes[this.size].sashing; } else { this.lineItems.push({text:"No sashing", price:0}); } if(isNaN(this.promo)) { this.lineItems.push({text:"No promo code", price:0}); } else { this.lineItems.push({text:"Promo code", price: promos[this.promo].price}); total = total + promos[this.promo].price; } this.lineItems.push({text:"Shipping", price:this.shipping}); total = total + this.shipping; this.lineItems.push({text:"Order Total", price:total}); return this.lineItems; }; And the model code assembled an array of objects based upon the items selected. I'll abbreviate the class as it croaks as long as the array has a row. function OrderModel() { this.lineItems = []; // Result of the lineItems call ... this.getLineItems = function() { var total = 0; this.lineItems = []; ... this.lineItems.push({text:"Order Total", price:total}); return this.lineItems; }; }

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  • How to create a communication layer in android

    - by Palo
    I want to create a communication layer in android. The layer will communicate with server asynchronously. Multiple activities should be able to call methods of the communication layer. The layer will get messages from the server (it is not important for the scope of this question how) and should be able to tell activities to do some work based on these messages. How should I implement this? Should I do this using android Service? The main questions that I need to answer are: How can activities access the layer? How can the layer access activities? How can i make the communication layer live for the lifetime of the application?

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  • 'Lexical' scoping of type parameters in C#

    - by leppie
    I have 2 scenarios. This fails: class F<X> { public X X { get; set; } } error CS0102: The type 'F' already contains a definition for 'X' This works: class F<X> { class G { public X X { get; set; } } } The only logical explanation is that in the second snippet the type parameter X is out of scope, which is not true... Why should a type parameter affect my definitions in a type? IMO, for consistency, either both should work or neither should work. Any other ideas? PS: I call it 'lexical', but it probably is not not the correct term.

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  • How to run a .exe with dll in different location

    - by queandans
    I am working in C# and implementing Plugin Management feature to our application. I look through dll and exe to load up plugins that are in a specific folder say Plugins. These plugin applications have their own folder when they are installed and I will copy over the plugin application exe/dll to the Plugins folder. However, there are some plugin applications that requires other dlls to run, but I want to minimize the duplication. Is there a way that I can just copy over the .exe to the Plugins folder and have the other dependent dll files locate in other folder? How would I load the the plugin in c# if the .exe and .dll is not in the same location? Thanks.

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  • Save BLOB to disk as Image C#

    - by TGuimond
    Hello, I am developing a web application that calls web services developed by a third party to send/receive data from a clients database. I am building the application using ASP.NET 3.5 C#. The way that they are providing me images is in BLOB format. I call their method and what I get back is a DataSet with 2 fields "logo_name" and "logo" which is the BLOB field. What I want to do is: Save the image locally on the disk (to minimize calls to their database in the future). I have been playing around with a couple of different ways of doing this but cannot seem to get the image to save correctly. I have been able to create a file in a folder with the correct name but if I try to view the image it does not work. I was hoping someone could give me some sample code to show me how to save a BLOB field to the local disk? Thanks

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  • How to catch exceptions from another program (for logging)?

    - by CuriousCoder
    I am working on a tool that monitors a number of applications and ensures they are always running and in a clean state. Some of these applications have unhandled exceptions which do occur periodically and present the 'send crash report' window. I do not have the source code to these applications. Is there any mechanism I could use to catch the exceptions, or simply identify their exception type, as well as identify the application's main executable file that threw the exception. I'm not trying to do anything crazy like catch and handle it on the applications behalf, I'm simply trying to capture the exception type, log it and then restart the application.

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  • Flex 3 / ColdFusion Session Issue?

    - by dcolumbus
    Alright so this is an odd one... I have an application built in ColdFusion with a lot of the interactivity done with Flex. When a user logs in, there are session variables, as well as the client session that is evoked. When you browse to any given Flex Application, the variables are read in a used accordingly... however, on Windows (it seems XP and maybe others) for some reason session information like USER are randomly undefined... Could this be an issue with the session timing out? Even if I force a logout and log back in, it doesn't really seem to fix the issue... mind you, I cannot duplicate the bug myself, but it constantly happens on PCs.

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  • How do I use global resources in WPF?

    - by Banford
    I have a WPF application which I would like to use some static resources in. I have created a Resource Library XAML file which contains a resource. I have also added a string into the Resources of the project through the Properties panel. I assumed I could just use these resources with the binding expression: {StaticResource ResourceName} But visual studio is telling me the resources are not found. Do I have to include some form of reference in my XAML? The examples I have seen only include resources locally such as: <Window.Resources>, <Page.Resources> etc I don't want to include the resources locally because I want them to be available to multiple parts of the application.

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  • Logging into oracle db as a global user

    - by kineas
    We are trying to shape up an old, 2 tier, Delphi based application. It originally uses database authentication, we'd like to transform the db user accounts to global users, so an OID server could perform the authentication instead of the database. The Delphi program can no longer log into the database if the account is a global user. I'm trying to understand the login protocol, so far without results. Similar thing happens with SQLDeveloper, I can't connect as a global user. SQLPlus however works with both kinds of users. We checked the information flow with Wireshark. When the dbserver asks back for a password, the SQLPlus sends it, while the SQLDeveloper doesn't send a password when attempting to connect as a global user. The client sends the application name too in the login request. Is it possible that we have to store the client app name in the LDAP itself?

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  • XCode 4.3 : XIB files and localisation

    - by Fabrice MAUPIN
    I have a problem with XIB Files and localizations (Xcode 4.3, Mac Os X 10.7.4) My application supports french and english localizations. For my test, i decided to change the languages and regions from "french" to "english" in system preferences. When i launch my application, it displays always old XIB files (french) et not the XIB files "attached" to my new localization ! ** I followed all the recommendations which i was able to find : i cleared all caches, clean up the project, ... and so on ! The problem is always here and persists. Can be that XCode4 has the other files to delete somewhere else ? is it possible to use another means to test my new localization ? If you are a idea, ... Thanks in advance. FM.

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  • Silverlight MVVM example which does not use data grids?

    - by Aim Kai
    I was wondering if anyone knew of a great example of using the MVVC pattern for a Silverlight application that does not utilise a data grid? Most of the examples I have read see links below and books such as Pro WPF and Silverlight MVVM by Gary Hall use a silverlight application with a datagrid. Don't get me wrong, these are all great examples. See also: MVVM: Tutorial from start to finish? http://www.silverlight.net/learn/tutorials/silverlight-4/using-the-mvvm-pattern-in-silverlight-applications/ However some recent demo projects I have been working are not necessarily dealing with data grids but I would still want to implement this pattern..

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  • Building Cocoa UIs for OS X with C# and Mono

    - by Antony Perkov
    Has anyone spent any time comparing the various Objective C bridges and associated Cocoa wrappers for Mono? I want to port an existing C# application to run on OS X. Ideally I'd run the application on Mono, and build a native Cocoa UI for it. I'm wondering which bridge would be the best choice. In case it's useful to anyone, here are some links to bridges I've found so far: CocoSharp - distributed with Mono on OS X - www.cocoa-sharp.com Monobjc - better documentation than the others (in my opinion) - www.mono-project.com/CocoaSharp and www.monobjc.net NObjective - (apparently) faster than the others - code.google.com/p/nobjective MObjc / MCocoa - code.google.com/p/mobjc and code.google.com/p/mcocoa ObjC# - www.mono-project.com/ObjCSharp

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  • Websphere exception handling

    - by Benjamin
    Hi all, From a security standpoint, what is the best solution to handle application errors with Websphere? I've been thinking of creating a class that is called every time an application error is generated, log the error and display a generic error message to the users. In PHP this can be achieved using the set_exception_handler() function. Is there something similar for websphere that could be configured in the web.xml? I've found codes like this on the internet: <error-page> <error-code>500</error-code> <location>/servlet/ExceptionHandlerServlet</location> </error-page> But that would only work with "500" HTTP error codes. I really want something generic that catches everything. Something like a class that implements a certain interface which can have access to all information about the error. Thanks for your time.

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  • getting global name not defined error

    - by nashr rafeeg
    i have the following class class notify(): def __init__(self,server="localhost", port=23053): self.host = server self.port = port register = gntp.GNTPRegister() register.add_header('Application-Name',"SVN Monitor") register.add_notification("svnupdate",True) growl(register) def svn_update(self, author="Unknown", files=0): notice = gntp.GNTPNotice() notice.add_header('Application-Name',"SVN Monitor") notice.add_header('Notification-Name', "svnupdate") notice.add_header('Notification-Title',"SVN Commit") # notice.add_header('Notification-Icon',"") notice.add_header('Notification-Text',Msg) growl(notice) def growl(data): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((self.host,self.port)) s.send(data) response = gntp.parse_gntp(s.recv(1024)) print response s.close() but when ever i try to use this class via the follwoing code i get 'NameError: global name 'growl' is not defined' from growlnotify import * n = notify() n.svn_update() any one has an idea what is going on here ? cheers nash

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  • I want to design a html form in python

    - by VaIbHaV-JaIn
    when user will enter details in the text box on the html from <h1>Please enter new password</h1> <form method="POST" enctype="application/json action="uid"> Password<input name="passwd"type="password" /><br> Retype Password<input name="repasswd" type="password" /><br> <input type="Submit" /> </form> </body> i want to post the data in json format through http post request and also i want to set content-type = application/json

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  • Creating iPhoto albums using Cocoa Scripting Bridge

    - by robinjam
    I'm tearing my hair out trying to create a new album from a Cocoa Application. In applescript it's a nice simple procedure: tell application "iPhoto" new album name "Album" end tell But I can't work out how this is done in Cocoa via the Scripting Bridge. I've tried this: iPhotoApplication *iPhoto = [SBApplication applicationWithBundleIdentifier:@"com.apple.iPhoto"]; iPhotoAlbum *newAlbum = [[[[iPhoto classForScriptingClass:@"album"] alloc] initWithProperties:[NSDictionary dictionaryWithObject:@"Album" forKey:@"name"]] autorelease]; [[iPhoto albums] addObject:newAlbum]; But that had no effect. Please help!

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