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  • Spring MVC defaultValue for Double

    - by mlathe
    Hi All, I'm trying to build a controller like this: @RequestMapping(method = {RequestMethod.GET}, value = "/users/detail/activities.do") public View foo(@RequestParam(value = "userCash", defaultValue="0.0") Double userCash) { System.out.println("foo userCash=" + userCash); } This works fine: http://localhost/app/users/detail/activities.do?userCash=123& but in this one userCash==null despite the default value http://localhost/app/users/detail/activities.do?userCash=& From some digging it seems like the first one works b/c of a Editor binding like this: binder.registerCustomEditor(Double.class, new CustomNumberEditor(Double.class, false)); The trouble is that the second param (ie false) defines whether blank values are allowed. If i set that to true, than the system considers the blank input as valid so i get a null Double class. If i set it to false then the system chokes on the blank input string with: org.springframework.beans.TypeMismatchException: Failed to convert value of type 'java.lang.String' to required type 'double'; nested exception is java.lang.NumberFormatException: empty String Does anyone know how to get the defaultValue to work for Doubles? Thanks --Matthias

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  • Timeout event in netty 4

    - by user1819425
    Hi I would like receive an event where messageReceived does not get called within an expected time. I tried with ReadTimeoutHandler where it generates exception where I can handle in exceptionCaught() where I would would do some work and return without closing the context. but right after that I got a bunch of exception Nov 18, 2012 8:56:34 AM io.netty.channel.ChannelInitializer WARNING: Failed to initialize a channel. Closing: [id: 0xa81de260, /127.0.0.1:59763 = /127.0.0.1:59724] io.netty.channel.ChannelHandlerLifeCycleException: io.netty.handler.timeout.ReadTimeoutHandler is not a @Sharable handler, so can't be added or removed multiple times. at io.netty.channel.DefaultChannelPipeline.callBeforeAdd(DefaultChannelPipeline.java:629) at io.netty.channel.DefaultChannelPipeline.addLast0(DefaultChannelPipeline.java:173) Am I doing correctly? Thanks

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  • NameNotFoundException when calling a EJB in Weblogic 10.3

    - by XpiritO
    First of all, I'd like to underline that I've already read other posts in StackOverflow (example) with similar questions, but unfortunately I didn't manage to solve this problem with the answers I saw on those posts. I have no intention to repost a question that has already been answered, so if that's the case, I apologize and I'd be thankful to whom points out where the solution is posted. Here is my question: I'm trying to deploy an EJB in WebLogic 10.3.2. The purpose is to use a specific WorkManager to execute work produced in the scope of this component. With this in mind, I've set up a WorkManager (named ResponseTimeReqClass-0) on my WebLogic configuration, using the web-based interface (Environment Work Managers New). Here is a screenshot: Here is my session bean definition and descriptors: OrquestratorRemote.java package orquestrator; import javax.ejb.Remote; @Remote public interface OrquestratorRemote { public void initOrquestrator(); } OrquestratorBean.java package orquestrator; import javax.ejb.Stateless; import com.siemens.ecustoms.orchestration.eCustomsOrchestrator; @Stateless(name = "OrquestratorBean", mappedName = "OrquestratorBean") public class OrquestratorBean implements OrquestratorRemote { public void initOrquestrator(){ eCustomsOrchestrator orquestrator = new eCustomsOrchestrator(); orquestrator.run(); } } META-INF\ejb-jar.xml <?xml version='1.0' encoding='UTF-8'?> <ejb-jar xmlns='http://java.sun.com/xml/ns/javaee' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' metadata-complete='true'> <enterprise-beans> <session> <ejb-name>OrquestradorEJB</ejb-name> <mapped-name>OrquestratorBean</mapped-name> <business-remote>orquestrator.OrquestratorRemote</business-remote> <ejb-class>orquestrator.OrquestratorBean</ejb-class> <session-type>Stateless</session-type> <transaction-type>Container</transaction-type> </session> </enterprise-beans> <assembly-descriptor></assembly-descriptor> </ejb-jar> META-INF\weblogic-ejb-jar.xml (I've placed work manager configuration in this file, as I've seen on a tutorial on the internet) <weblogic-ejb-jar xmlns="http://www.bea.com/ns/weblogic/90" xmlns:j2ee="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.bea.com/ns/weblogic/90 http://www.bea.com/ns/weblogic/90/weblogic-ejb-jar.xsd"> <weblogic-enterprise-bean> <ejb-name>OrquestratorBean</ejb-name> <jndi-name>OrquestratorBean</jndi-name> <dispatch-policy>ResponseTimeReqClass-0</dispatch-policy> </weblogic-enterprise-bean> </weblogic-ejb-jar> I've compiled this into a JAR and deployed it on WebLogic, as a library shared by administrative server and all cluster nodes on my solution (it's in "Active" state). As I've seen in several tutorials and examples, I'm using this code on my application, in order to call the bean: InitialContext ic = null; try { Hashtable<String,String> env = new Hashtable<String,String>(); env.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory"); env.put(Context.PROVIDER_URL, "t3://localhost:7001"); ic = new InitialContext(env); } catch(Exception e) { System.out.println("\n\t Didn't get InitialContext: "+e); } // try { Object obj = ic.lookup("OrquestratorBean"); OrquestratorRemote remote =(OrquestratorRemote)obj; System.out.println("\n\n\t++ Remote => "+ remote.getClass()); System.out.println("\n\n\t++ initOrquestrator()"); remote.initOrquestrator(); } catch(Exception e) { System.out.println("\n\n\t WorkManager Exception => "+ e); e.printStackTrace(); } Unfortunately, this don't work. It throws an exception on runtime, as follows: WorkManager Exception = javax.naming.NameNotFoundException: Unable to resolve 'OrquestratorBean'. Resolved '' [Root exception is javax.naming.NameNotFoundException: Unable to resolve 'OrquestratorBean'. Resolved '']; remaining name 'OrquestratorBean' After seeing this, I've even tried changing this line Object obj = ic.lookup("OrquestratorBean"); to this: Object obj = ic.lookup("OrquestratorBean#orquestrator.OrquestratorBean"); but the result was the same runtime exception. Can anyone please help me detecting what am I doing wrong here? I'm having a bad time debugging this, as I don't know how to check out what may be causing this issue... Thanks in advance for your patience and help.

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  • Spring MVC - Cannot map request parameters as a Map parameter in method?

    - by Ken Chen
    What I want to do is passing a map to the method in Controller using @RequestParam, but it seems not working. While this is working in Struts 2. Below is what I am trying: In JSP using JQuery: var order = {}; order['seq'] = "ASC"; var criteria = {}; criteria['label'] = "Directory"; $.post(context + 'menu/list', {"orders" : order, "criterias" : criteria} The parameters I am trying to post is an 'map' object order and criteria for listing menu. In Java: @RequestMapping("/{collection}/list") public @ResponseBody Map<String, ? extends Object> list(@PathVariable String collection, @RequestParam("criterias") Map<String, String> criteria, @RequestParam("orders") Map<String, String> order) { However, when I print out the map criteria & order in Java, it takes all value as below: Criteria: {criterias[label]=Directory, orders[seq]=ASC} Order: {criterias[label]=Directory, orders[seq]=ASC} Can @RequestParam in Spring be used to init a Map parameter?

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  • Watch the Silverlight 4 Launch event and LIVE QA with ScottGu and others

    Next week on 13-April at 8:00 AM PST Scott Guthrie will deliver a keynote address for the DevConnections conference being held in Las Vegas, NV. Scott will provide updates on the progress made in Silverlight 4 and will provide the details of availability of the developer tools, runtime and other news. Mark your calendars and return to the Silverlight community site to tune into the LIVE event. After the keynote, Channel 9 will be hosting interviews with Scott and other key members of the Silverlight...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • What functionality does dynamic typing allow?

    - by Justin984
    I've been using python for a few days now and I think I understand the difference between dynamic and static typing. What I don't understand is under what circumstances it would be preferred. It is flexible and readable, but at the expense of more runtime checks and additional required unit testing. Aside from non-functional criteria like flexibility and readability, what reasons are there to choose dynamic typing? What can I do with dynamic typing that isn't possible otherwise? What specific code example can you think of that illustrates a concrete advantage of dynamic typing?

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  • Embedded BI for ASP.NET

    - by Michael Shimmins
    Can anyone recommend a decent business intelligence & reporting application that can be integrated into an OEM application? Primary requirements are: Administrators can define cubes/dimensions etc (or we - the OEM - can predefine some) Report designers can easily inspect data by visually selecting dimensions, filters etc in an adhoc way that is quickly output with little upfront investment Report designers can design a report based on dimensions/filters and save their definition to be run as required Report viewers can view the reports defined by the report designers All of this plus in .NET that can be branded/integrated into our existing web application's look and feel. Permissions need to work off our user/groups system. I've found a few that look good, but they are all in Java and I don't want to ask our clients to install ASP.NET for the app, and then Java, tomcat etc just for reporting. Thanks

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  • Bluetooth connect to a RS232 adapter in android

    - by ThePosey
    Hello All, I am trying to use the Bluetooth Chat sample API app that google provides to connect to a bluetooth RS232 adapter hooked up to another device. Here is the app for reference: http://developer.android.com/resources/samples/BluetoothChat/index.html And here is the spec sheet for the RS232 connector just for reference: http://serialio.com/download/Docs/BlueSnap-guide-4.77%5FCommands.pdf Well the problem is that when I go to connect to the device with: mmSocket.connect(); (BluetoothSocket::connect()) I always get an IOException error thrown by the connect method. When I do a toString on the exception I get "Service discovery failed". My question is mostly what are the cases that would cause an IOException to get thrown in the connect method? I know those are in the source somewhere but I don't know exactly how the java layer that you write apps in and the C/C++ layer that contains the actual stacks interface. I know that it uses the bluez bluetooth stack which is written in C/C++ but not sure how that ties into the java layer which is what I would think is throwing the exception. Any help on pointing me to where I can try to dissect this issue would be incredible. Also just to note I am able to pair with the RS232 adapter just fine but I am never able to actually connect. Here is the logcat output for more reference: I/ActivityManager( 1018): Displayed activity com.example.android.BluetoothChat/.DeviceListActivity: 326 ms (total 326 ms) E/BluetoothService.cpp( 1018): stopDiscoveryNative: D-Bus error in StopDiscovery: org.bluez.Error.Failed (Invalid discovery session) D/BluetoothChat( 1729): onActivityResult -1 D/BluetoothChatService( 1729): connect to: 00:06:66:03:0C:51 D/BluetoothChatService( 1729): setState() STATE_LISTEN - STATE_CONNECTING E/BluetoothChat( 1729): + ON RESUME + I/BluetoothChat( 1729): MESSAGE_STATE_CHANGE: STATE_CONNECTING I/BluetoothChatService( 1729): BEGIN mConnectThread E/BluetoothService.cpp( 1018): stopDiscoveryNative: D-Bus error in StopDiscovery: org.bluez.Error.Failed (Invalid discovery session) E/BluetoothEventLoop.cpp( 1018): event_filter: Received signal org.bluez.Device:PropertyChanged from /org/bluez/1498/hci0/dev_00_06_66_03_0C_51 I/BluetoothChatService( 1729): CONNECTION FAIL TOSTRING: java.io.IOException: Service discovery failed D/BluetoothChatService( 1729): setState() STATE_CONNECTING - STATE_LISTEN D/BluetoothChatService( 1729): start D/BluetoothChatService( 1729): setState() STATE_LISTEN - STATE_LISTEN I/BluetoothChat( 1729): MESSAGE_STATE_CHANGE: STATE_LISTEN V/BluetoothEventRedirector( 1080): Received android.bleutooth.device.action.UUID I/NotificationService( 1018): enqueueToast pkg=com.example.android.BluetoothChat callback=android.app.ITransientNotification$Stub$Proxy@446327c8 duration=0 I/BluetoothChat( 1729): MESSAGE_STATE_CHANGE: STATE_LISTEN E/BluetoothEventLoop.cpp( 1018): event_filter: Received signal org.bluez.Device:PropertyChanged from /org/bluez/1498/hci0/dev_00_06_66_03_0C_51 V/BluetoothEventRedirector( 1080): Received android.bleutooth.device.action.UUID The device I'm trying to connect to is the 00:06:66:03:0C:51 which I can scan for and apparently pair with just fine.

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  • Javascript DateFormat for different timezones

    - by Elie
    I'm a Java developer and I'm used to the SimpleDateFormat class that allows me to format any date to any format by settings a timezone. Date date = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy hh:mm:ss"); sdf.setTimeZone(TimeZone.getTimeZone("America/Los_Angeles")); System.out.println(sdf.format(date)); // Prints date in Los Angeles sdf.setTimeZone(TimeZone.getTimeZone("America/Chicago")); System.out.println(sdf.format(date)); // Prints same date in Chicago SimpleDateFormat is a pretty neat solution in Java but unfortunately I can't find any similar alternative in Javascript. I'm extending the Date prototype in Javascript to do exactly the same. I have dates in Unix format but I want to format them in different timezones. Date.prototype.format = function(format, timezone) { // Now what? return formattedDate; } I'm looking for a neat way to do this rather than a hack. Thanks

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  • Is Updating double operation atomic

    - by Yan Cheng CHEOK
    In Java, updating double and long variable may not be atomic, as double/long are being treated as two separate 32 bits variables. http://java.sun.com/docs/books/jls/second_edition/html/memory.doc.html#28733 In C++, if I am using 32 bit Intel Processor + Microsoft Visual C++ compiler, is updating double (8 byte) operation atomic? I cannot find much specification mention on this behavior. When I say "atomic variable", here is what I mean : Thread A trying to write 1 to variable x. Thread B trying to write 2 to variable x. We shall get value 1 or 2 out from variable x, but not an undefined value.

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  • How can I automatically change the system keyboard layout when plugging in an external keyboard?

    - by Andrew Bolster
    I have a US-Style laptop, which is fine, but I also have a UK-style Ergonomic USB keyboard. As such I usually have the US key layout set, but when I settle in at my desk and use the UK USB keyboard I find myself making stupid mistakes on symbols (normally a pretty good touch typist on either ergo or standard kbd). Can anyone think of a clean way of setting the keyboard layout based on the inferred layout/USBID of any plugged in Keyboard? Even having a custom setting such as adding a specific USB ID to a runtime script that checks if its plugged in or not. Can this be done without the user having to logout/in? I remember doing something similar with xorg.conf, but that required logout.

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  • LightFish, Adam Bien's lightweight telemetry application

    - by alexismp
    Adam Bien (Java Champion, JavaEE expert, book author, etc...), has been a GlassFish enthusiast for a while and he proves it again with his new open source project - LightFish, a lightweight monitoring and visualization application for GlassFish. Adam has a short intro and screencast about this standalone WAR application. The tool uses the new JavaEE 6 self-described JDBC connection and the GlassFish-bundled Derby database to provide drag-and-drop install. At runtime, once monitoring is enabled, calls to the RESTful admin API for GlassFish are emitted from a JavaFX dashboard plotting in real-time telemetry data on charts and graphs, including data for "Paranormal Activity". Check it out!

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  • F# performance in scientific computing

    - by aaa
    hello. I am curious as to how F# performance compares to C++ performance? I asked a similar question with regards to Java, and the impression I got was that Java is not suitable for heavy numbercrunching. I have read that F# is supposed to be more scalable and more performant, but how is this real-world performance compares to C++? specific questions about current implementation are: How well does it do floating-point? Does it allow vector instructions how friendly is it towards optimizing compilers? How big a memory foot print does it have? Does it allow fine-grained control over memory locality? does it have capacity for distributed memory processors, for example Cray? what features does it have that may be of interest to computational science where heavy number processing is involved? Are there actual scientific computing implementations that use it? Thanks

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  • TechDays 2010: What’s New On C# 4.0

    - by Paulo Morgado
    I would like to thank those that attended my session at TechDays 2010 and I hope that I was able to pass the message of what’s new on C#. For those that didn’t attend (or did and want to review it), the presentation can be downloaded from here. Code samples can be downlaoded from here. Here’s a list of resources mentioned on the session: The evolution of C# The Evolution Of C# Covariance and contravariance  C# 4.0: Covariance And Contravariance In Generics Covariance And Contravariance In Generics Made Easy Covarince and Contravariance in Generics Exact rules for variance validity Events get a little overhaul in C# 4, Afterward: Effective Events Named and optional arguments  Named And Optional Arguments Alternative To Optional Arguments Named and Optional Arguments (C# Programming Guide) Dynamic programming  Dynamic Programming C# Proposal: Compile Time Static Checking Of Dynamic Objects Using Type dynamic (C# Programming Guide) Dynamic Language Runtime Overview COM Interop Improvements COM Interop Improvements Type Equivalence and Embedded Interop Types Conclusion Visual C# Developer Center Visual C# 2010 Samples C# Language Specification 4.0 .NET Reflector LINQPad

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  • Google Search api for Android systems

    - by jrharshath
    Hi, I'm trying to build an android app that would do a local search on google. I know there is a Google Search API for Java, and I am able to use it for a desktop application. However, when I use the same jar file (gsearch.jar) in my android project, Some problems arise. When I call the .localSearch() method of my gsearch.Client object, a runtime error is occurring. The error message is: "java.lang.VerifyError: gsearch.Client". This message is occurring in the Dalvik Debug Monitor log. So what is the problem here? Can I not use the search API on the android? More importantly, how do I do a local search from an android app? Does the android sdk have search APIs inbuilt? I could only find the Maps api, and Map search is not what I'm looking for.. Thanks for the help, jrh

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  • What can I do with dynamic typing that I can not do with static typing

    - by Justin984
    I've been using python for a few days now and I think I understand the difference between dynamic and static typing. What I don't understand is why it's useful. I keep hearing about its "flexibility" but it seems like it just moves a bunch of compile time checks to runtime, which means more unit tests. This seems like an awfully big tradeoff to make for small advantages like readability and "flexibility". Can someone provide me with a real world example where dynamic typing allows me to do something I can't do with static typing?

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  • Problem with creating a newenvironment in LaTeX

    - by Andreas Grech
    I am trying to implement this new environment in LaTeX: \newenvironment{javacode}[2] {\begin{lstlisting}[language=java, label=#1, caption=#2]} {\end{lstlisting}} And then use it like such: \begin{javacode}{c}{some code} int x = 5; \end{javacode} But I am getting the following error: Overfull \hbox (6.0pt too wide) in paragraph at lines 6--6 [][][][][][][] [1] [2]) [3]) * Can anyone help as regards fixing this problem? [Update] I tried it doing it like Red-nosed unicorn instructed, and it worked correctly. But now I tried adding a \begin{singlespace} like such: \lstnewenvironment{javacode}[2] { \begin{singlespace} \lstset{language=java, label=#1, caption=#2}} { \end{singlespace} } And I got the same error: Overfull \hbox (6.0pt too wide) in paragraph at lines 6--6 [][][][][][][] [1]) [2] [3]) *

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  • Web Service to connect to an API and get the response back from the API

    - by Scarlette_June
    This is a general Programming question I'm new to Java Web services programming using Apache Axis and JAX-RPC. We need to build 2 components,a App engine (Shopping cart, Payment Gateway integration etc..) and a UI Control Panel over an existing API. The API understands only XML.How we must communicate with the API? link text We have been asked to write a Web Service to establish the communication. Please provide the steps and a Code example/snippet on how to connect to an existing API through a Webservice and get the response back from the API to the calling Webservice. John,I hope I have been able to explain my query.If you have ideas on how to communicate with the API to get the desired result to the user,Please let us know. We have just started our careers in technology a year back post our graduation and this project is our very first Java EE project.

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  • Web publishing system with code highlighting

    - by Dragos Toader
    I'd like to publish some of the many programs I've written on the web. Is there a syntax highlighting Linux web publishing application (CMS/Blog/RoR app) that displays syntax for C++, Python, Bash scripts, SQL, VBA, awk, Erlang, java, makefiles, Ruby, Pascal and other languages? The more syntax settings configuration files, the better. The extensions I have in Textpad (for which I have syntax highlighting -- syn files) are .as, .asm, .asp, .awk, .bas, .bat, .c, .conf, .cpp, .cs, .ctl, .dfm, .dsc, .erl, .fnc, .h, .hpp, .inf, .ini, .jav, .java, .mak, .nsh, .nsi, .ora, .pas, .pkb, .pks, .pl, .prc, .py, .reg, .rsp, .sh, .sql, .syn, .tcl, .trg, .vw, .xml, .xsl, .xslfo

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  • International Radio Operators Alphabet in F# &amp; Silverlight &ndash; Part 2

    - by MarkPearl
    So the brunt of my my very complex F# code has been done. Now it’s just putting the Silverlight stuff in. The first thing I did was add a new project to my solution. I gave it a name and VS2010 did the rest of the magic in creating the .Web project etc. In this instance because I want to take the MVVM approach and make use of commanding I have decided to make the frontend a Silverlight4 project. I now need move my F# code into a proper Silverlight Library. Warning – when you create the Silverlight Library VS2010 will ask you whether you want it to be based on Silverlight3 or Silverlight4. I originally went for Silverlight4 only to discover when I tried to compile my solution that I was given an error… Error 12 F# runtime for Silverlight version v4.0 is not installed. Please go to http://go.microsoft.com/fwlink/?LinkId=177463 to download and install matching.. After asking around I discovered that the Silverlight4 F# runtime is not available yet. No problem, the suggestion was to change the F# Silverlight Library to a Silverlight3 project however when going to the properties of the project file – even though I changed it to Silverlight3, VS2010 did not like it and kept reverting it to a Silverlight4 project. After a few minutes of scratching my head I simply deleted Silverlight4 F# Library project and created a new F# Silverlight Library project in Silverlight3 and VS2010 was happy. Now that the project structure is set up, rest is fairly simple. You need to add the Silverlight Library as a reference to the C# Silverlight Front End. Then setup your views, since I was following the MVVM pattern I made a Views & ViewModel folder and set up the relevant View and ViewModels. The MainPageViewModel file looks as follows using System; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Ink; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.Collections.ObjectModel; namespace IROAFrontEnd.ViewModels { public class MainPageViewModel : ViewModelBase { private string _iroaString; private string _inputCharacters; public string InputCharacters { get { return _inputCharacters; } set { if (_inputCharacters != value) { _inputCharacters = value; OnPropertyChanged("InputCharacters"); } } } public string IROAString { get { return _iroaString; } set { if (_iroaString != value) { _iroaString = value; OnPropertyChanged("IROAString"); } } } public ICommand MySpecialCommand { get { return new MyCommand(this); } } public class MyCommand : ICommand { readonly MainPageViewModel _myViewModel; public MyCommand(MainPageViewModel myViewModel) { _myViewModel = myViewModel; } public event EventHandler CanExecuteChanged; public bool CanExecute(object parameter) { return true; } public void Execute(object parameter) { var result = ModuleMain.ConvertCharsToStrings(_myViewModel.InputCharacters); var newString = ""; foreach (var Item in result) { newString += Item + " "; } _myViewModel.IROAString = newString.Trim(); } } } } One of the features I like in Silverlight4 is the new commanding. You will notice in my I have put the code under the command execute to reference to my F# module. At the moment this could be cleaned up even more, but will suffice for now.. public void Execute(object parameter) { var result = ModuleMain.ConvertCharsToStrings(_myViewModel.InputCharacters); var newString = ""; foreach (var Item in result) { newString += Item + " "; } _myViewModel.IROAString = newString.Trim(); } I then needed to set the view up. If we have a look at the MainPageView.xaml the xaml code will look like the following…. Nothing to fancy, but battleship grey for now… take careful note of the binding of the command in the button to MySpecialCommand which was created in the ViewModel. <UserControl x:Class="IROAFrontEnd.Views.MainPageView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="400"> <Grid x:Name="LayoutRoot" Background="White"> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <TextBox Grid.Row="0" Text="{Binding InputCharacters, Mode=TwoWay}"/> <Button Grid.Row="1" Command="{Binding MySpecialCommand}"> <TextBlock Text="Generate"/> </Button> <TextBlock Grid.Row="2" Text="{Binding IROAString}"/> </Grid> </UserControl> Finally in the App.xaml.cs file we need to set the View and link it to the ViewModel. private void Application_Startup(object sender, StartupEventArgs e) { var myView = new MainPageView(); var myViewModel = new MainPageViewModel(); myView.DataContext = myViewModel; this.RootVisual = myView; }   Once this is done – hey presto – it worked. I typed in some “Test Input” and clicked the generate button and the correct Radio Operators Alphabet was generated. And that’s the end of my first very basic F# Silverlight application.

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  • Make Custom Project template in Eclipse IDE

    - by Mohit Deshpande
    I have been using Eclipse IDE for a long time. Its a really great IDE for Java/C/C++ (and other languages with its THOUSANDS of plugins). Every once in a while, I get the need for creating a Javax interface. To do this normally, I would setup the new java project then add what I need. But, wouldn't it be nice if I could just make a template project to automatically include the code for the files. How would I go about doing this? It it even possible? The Eclipse CDT can make a new project type. So can the Google ADT and Google App engine. So I would imagine it is possible. But how?

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  • android - using resources drawable in content provider

    - by Russ Wheeler
    I am trying to pass back an image through a content provider in a separate app. I have two apps, one with the activity in (app a), the other with content provider (app b) I have app a reading an image off my SD card via app b using the following code. App a: public void but_update(View view) { ContentResolver resolver = getContentResolver(); Uri uri = Uri.parse("content://com.jash.cp_source_two.provider/note/1"); InputStream inStream = null; try { inStream = resolver.openInputStream(uri); Bitmap bitmap = BitmapFactory.decodeStream(inStream); image = (ImageView) findViewById(R.id.imageView1); image.setImageBitmap(bitmap); } catch(FileNotFoundException e) { Toast.makeText(getBaseContext(), "error = "+e, Toast.LENGTH_LONG).show(); } finally { if (inStream != null) { try { inStream.close(); } catch (IOException e) { Log.e("test", "could not close stream", e); } } } }; App b: @Override public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException { try { File path = new File(Environment.getExternalStorageDirectory().getAbsolutePath(),"pic2.png"); return ParcelFileDescriptor.open(path,ParcelFileDescriptor.MODE_READ_ONLY); } catch (FileNotFoundException e) { Log.i("r", "File not found"); throw new FileNotFoundException(); } } In app a I am able to display an image from app a's resources folder, using setImageURi and constructing a URI using the following code. int id = R.drawable.a2; Resources resources = getBaseContext().getResources(); Uri uri = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" + resources.getResourcePackageName(id) + '/' + resources.getResourceTypeName(id) + '/' + resources.getResourceEntryName(id) ); image = (ImageView) findViewById(R.id.imageView1); image.setImageURI(uri); However, if I try to do the same in app b (read from app b's resources folder rather than the image on the SD card) it doesn't work, saying it can't find the file, even though I am creating the path of the file from the resource, so it is definitely there. Any ideas? Does it restrict sending resources over the content provider somehow? P.S. I also got an error when I tried to create the file with File path = new File(uri); saying 'there is no applicable constructor to '(android.net.Uri)' though http://developer.android.com/reference/java/io/File.html#File(java.net.URI) Seems to think it's possible...unless java.net.URI is different to android.net.URI, in which case can I convert them? Thanks Russ

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  • Eclipse + Git: Can't add files to my repository

    - by Stegeman
    I use Eclipse (Helios) with PDT and egit. I have a project without versioning, so I created a git repository for it by doing: Team -> Share Project When I try to add the files of my project to the repository: Team -> Add I get an exception: Failed to add resource to index Failed to add resource to index Exception caught during execution of add command When I add the files manually on the command line, everything is working fine. Any ideas? EDIT: The error eclipse gives is: Caused by: org.eclipse.jgit.errors.ObjectWritingException: Unable to create new object: Z:\eage_layout\.git\objects\60\f30dd232bd6ddaeb198fb11400c2613a072189 at org.eclipse.jgit.storage.file.ObjectDirectoryInserter.insert(ObjectDirectoryInserter.java:100) at org.eclipse.jgit.api.AddCommand.call(AddCommand.java:177) The code I'm running is located on a virtual machine running on CentOs. I'm working on a windows machine and using a samba share to get access to the code on the virtual machine. I've put the filesystem permissions on my .git directory to 777, but still it does not work.

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  • Decision Tree code golf

    - by Chris Jester-Young
    In Google Code Jam 2009, Round 1B, there is a problem called Decision Tree that lent itself to rather creative solutions. Post your shortest solution; I'll update the Accepted Answer to the current shortest entry on a semi-frequent basis, assuming you didn't just create a new language just to solve this problem. :-P Current rankings: 107 Perl 121 PostScript (binary) 136 Ruby 154 Arc 160 PostScript (ASCII85) 170 PostScript 192 Python 199 Common Lisp 214 LilyPond 222 JavaScript 273 Scheme 280 R 312 Haskell 314 PHP 339 m4 346 C 406 Fortran 462 Java 476 Java (well, kind of) 718 OCaml 759 F# 1741 sed C++ not qualified for now

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  • Announcing: Great Improvements to Windows Azure Web Sites

    - by ScottGu
    I’m excited to announce some great improvements to the Windows Azure Web Sites capability we first introduced earlier this summer.  Today’s improvements include: a new low-cost shared mode scaling option, support for custom domains with shared and reserved mode web-sites using both CNAME and A-Records (the later enabling naked domains), continuous deployment support using both CodePlex and GitHub, and FastCGI extensibility.  All of these improvements are now live in production and available to start using immediately. New “Shared” Scaling Tier Windows Azure allows you to deploy and host up to 10 web-sites in a free, shared/multi-tenant hosting environment. You can start out developing and testing web sites at no cost using this free shared mode, and it supports the ability to run web sites that serve up to 165MB/day of content (5GB/month).  All of the capabilities we introduced in June with this free tier remain the same with today’s update. Starting with today’s release, you can now elastically scale up your web-site beyond this capability using a new low-cost “shared” option (which we are introducing today) as well as using a “reserved instance” option (which we’ve supported since June).  Scaling to either of these modes is easy.  Simply click on the “scale” tab of your web-site within the Windows Azure Portal, choose the scaling option you want to use with it, and then click the “save” button.  Changes take only seconds to apply and do not require any code to be changed, nor the app to be redeployed: Below are some more details on the new “shared” option, as well as the existing “reserved” option: Shared Mode With today’s release we are introducing a new low-cost “shared” scaling mode for Windows Azure Web Sites.  A web-site running in shared mode is deployed in a shared/multi-tenant hosting environment.  Unlike the free tier, though, a web-site in shared mode has no quotas/upper-limit around the amount of bandwidth it can serve.  The first 5 GB/month of bandwidth you serve with a shared web-site is free, and then you pay the standard “pay as you go” Windows Azure outbound bandwidth rate for outbound bandwidth above 5 GB. A web-site running in shared mode also now supports the ability to map multiple custom DNS domain names, using both CNAMEs and A-records, to it.  The new A-record support we are introducing with today’s release provides the ability for you to support “naked domains” with your web-sites (e.g. http://microsoft.com in addition to http://www.microsoft.com).  We will also in the future enable SNI based SSL as a built-in feature with shared mode web-sites (this functionality isn’t supported with today’s release – but will be coming later this year to both the shared and reserved tiers). You pay for a shared mode web-site using the standard “pay as you go” model that we support with other features of Windows Azure (meaning no up-front costs, and you pay only for the hours that the feature is enabled).  A web-site running in shared mode costs only 1.3 cents/hr during the preview (so on average $9.36/month). Reserved Instance Mode In addition to running sites in shared mode, we also support scaling them to run within a reserved instance mode.  When running in reserved instance mode your sites are guaranteed to run isolated within your own Small, Medium or Large VM (meaning no other customers run within it).  You can run any number of web-sites within a VM, and there are no quotas on CPU or memory limits. You can run your sites using either a single reserved instance VM, or scale up to have multiple instances of them (e.g. 2 medium sized VMs, etc).  Scaling up or down is easy – just select the “reserved” instance VM within the “scale” tab of the Windows Azure Portal, choose the VM size you want, the number of instances of it you want to run, and then click save.  Changes take effect in seconds: Unlike shared mode, there is no per-site cost when running in reserved mode.  Instead you pay only for the reserved instance VMs you use – and you can run any number of web-sites you want within them at no extra cost (e.g. you could run a single site within a reserved instance VM or 100 web-sites within it for the same cost).  Reserved instance VMs start at 8 cents/hr for a small reserved VM.  Elastic Scale-up/down Windows Azure Web Sites allows you to scale-up or down your capacity within seconds.  This allows you to deploy a site using the shared mode option to begin with, and then dynamically scale up to the reserved mode option only when you need to – without you having to change any code or redeploy your application. If your site traffic starts to drop off, you can scale back down the number of reserved instances you are using, or scale down to the shared mode tier – all within seconds and without having to change code, redeploy, or adjust DNS mappings.  You can also use the “Dashboard” view within the Windows Azure Portal to easily monitor your site’s load in real-time (it shows not only requests/sec and bandwidth but also stats like CPU and memory usage). Because of Windows Azure’s “pay as you go” pricing model, you only pay for the compute capacity you use in a given hour.  So if your site is running most of the month in shared mode (at 1.3 cents/hr), but there is a weekend when it gets really popular and you decide to scale it up into reserved mode to have it run in your own dedicated VM (at 8 cents/hr), you only have to pay the additional pennies/hr for the hours it is running in the reserved mode.  There is no upfront cost you need to pay to enable this, and once you scale back down to shared mode you return to the 1.3 cents/hr rate.  This makes it super flexible and cost effective. Improved Custom Domain Support Web sites running in either “shared” or “reserved” mode support the ability to associate custom host names to them (e.g. www.mysitename.com).  You can associate multiple custom domains to each Windows Azure Web Site.  With today’s release we are introducing support for A-Records (a big ask by many users). With the A-Record support, you can now associate ‘naked’ domains to your Windows Azure Web Sites – meaning instead of having to use www.mysitename.com you can instead just have mysitename.com (with no sub-name prefix).  Because you can map multiple domains to a single site, you can optionally enable both a www and naked domain for a site (and then use a URL rewrite rule/redirect to avoid SEO problems). We’ve also enhanced the UI for managing custom domains within the Windows Azure Portal as part of today’s release.  Clicking the “Manage Domains” button in the tray at the bottom of the portal now brings up custom UI that makes it easy to manage/configure them: As part of this update we’ve also made it significantly smoother/easier to validate ownership of custom domains, and made it easier to switch existing sites/domains to Windows Azure Web Sites with no downtime. Continuous Deployment Support with Git and CodePlex or GitHub One of the more popular features we released earlier this summer was support for publishing web sites directly to Windows Azure using source control systems like TFS and Git.  This provides a really powerful way to manage your application deployments using source control.  It is really easy to enable this from a website’s dashboard page: The TFS option we shipped earlier this summer provides a very rich continuous deployment solution that enables you to automate builds and run unit tests every time you check in your web-site, and then if they are successful automatically publish to Azure. With today’s release we are expanding our Git support to also enable continuous deployment scenarios and integrate with projects hosted on CodePlex and GitHub.  This support is enabled with all web-sites (including those using the “free” scaling mode). Starting today, when you choose the “Set up Git publishing” link on a website’s “Dashboard” page you’ll see two additional options show up when Git based publishing is enabled for the web-site: You can click on either the “Deploy from my CodePlex project” link or “Deploy from my GitHub project” link to walkthrough a simple workflow to configure a connection between your website and a source repository you host on CodePlex or GitHub.  Once this connection is established, CodePlex or GitHub will automatically notify Windows Azure every time a checkin occurs.  This will then cause Windows Azure to pull the source and compile/deploy the new version of your app automatically.  The below two videos walkthrough how easy this is to enable this workflow and deploy both an initial app and then make a change to it: Enabling Continuous Deployment with Windows Azure Websites and CodePlex (2 minutes) Enabling Continuous Deployment with Windows Azure Websites and GitHub (2 minutes) This approach enables a really clean continuous deployment workflow, and makes it much easier to support a team development environment using Git: Note: today’s release supports establishing connections with public GitHub/CodePlex repositories.  Support for private repositories will be enabled in a few weeks. Support for multiple branches Previously, we only supported deploying from the git ‘master’ branch.  Often, though, developers want to deploy from alternate branches (e.g. a staging or future branch). This is now a supported scenario – both with standalone git based projects, as well as ones linked to CodePlex or GitHub.  This enables a variety of useful scenarios.  For example, you can now have two web-sites - a “live” and “staging” version – both linked to the same repository on CodePlex or GitHub.  You can configure one of the web-sites to always pull whatever is in the master branch, and the other to pull what is in the staging branch.  This enables a really clean way to enable final testing of your site before it goes live. This 1 minute video demonstrates how to configure which branch to use with a web-site. Summary The above features are all now live in production and available to use immediately.  If you don’t already have a Windows Azure account, you can sign-up for a free trial and start using them today.  Visit the Windows Azure Developer Center to learn more about how to build apps with it. We’ll have even more new features and enhancements coming in the weeks ahead – including support for the recent Windows Server 2012 and .NET 4.5 releases (we will enable new web and worker role images with Windows Server 2012 and .NET 4.5 next month).  Keep an eye out on my blog for details as these new features become available. Hope this helps, Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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