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  • .Net Thread Synchronization

    - by user209293
    Hello, I am planning to use Auto reset Event Handle for Inter Thread communication. EventWaitHandle handle = new EventWaitHandle(false, EventResetMode.AutoReset); My producer thread code look like below produceSomething(); handle.Set(); In the consumer thread, I have to download data for every one minute or when prodcuer is called Set method try { while(true) { handle.WaitOne(60000, false); doSomething(); - downloads data from internet. takes lot of time to complete it. } } catch(ThreadAbortException) { cleanup(); } My question is if consumer thread is running doSomething funtion and producer calls set function, what would be state of Auto reset event object? My requreiment is as soon as producer calls set method i have to downlaod fresh data from intenet . If doSomething function is running, when Producer calls set method, i have to interrupt it and call again. Any help is appreciated. Regards Raju

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  • Why does C# not implement GetHashCode for Collections?

    - by Peterdk
    I am porting something from Java to C#. In Java the hashcode of a ArrayList depends on the items in it. In C# I always get the same hashcode from a List... Why is this? For some of my objects the hashcode needs to be different because the objects in their list property make the objects non-equal. I would expect that a hashcode is always unique for the object's state and only equals another hashcode when the object is equal. Am I wrong?

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  • Wpf Listbox and CheckBox

    - by Tan
    Hi iam using a listbox to show a list of items. in the listbox i ahve an togglebutton on every item. When i click on the toggle button the state of the togglebutton is pressed. But when i am scrolling down in the listbox and scolls up again. The togglebutton state is not pressed. How can i prevent this please help. Heres my itemtemplate <ListBox.ItemTemplate> <DataTemplate> <StackPanel Margin="0,3,0,0"> <Border BorderBrush="Black" BorderThickness="1,1,1,1"> <Border.Background> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0" MappingMode="RelativeToBoundingBox"> <GradientStop Color="#FFECECEC" Offset="1"/> <GradientStop Color="#FFE8E8E8"/> <GradientStop Color="#FFBDBDBD" Offset="0.153"/> <GradientStop Color="#FFE8E8E8" Offset="0.904"/> </LinearGradientBrush> </Border.Background> <Border.Style> <Style> <Style.Triggers> <DataTrigger Binding="{Binding Path=IsSelected, RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type ListBoxItem}}}" Value="True"> <Setter Property="Border.Height" Value="100"/> <Setter Property="Border.Background"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0" MappingMode="RelativeToBoundingBox"> <GradientStop Color="DarkGray" Offset="1"/> <GradientStop Color="#FFE8E8E8"/> <GradientStop Color="#FFBDBDBD" Offset="0.153"/> <GradientStop Color="DarkGray" Offset="0.904"/> </LinearGradientBrush> </Setter.Value> </Setter> </DataTrigger> </Style.Triggers> </Style> </Border.Style> <StackPanel Orientation="Horizontal" VerticalAlignment="Center"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="500"/> <ColumnDefinition Width="100"/> <ColumnDefinition Width="55"/> </Grid.ColumnDefinitions> <!--Pick number--> <StackPanel Grid.Column="0" VerticalAlignment="Center" Orientation="Vertical"> <TextBlock Text="{Binding Path=FtgNamn}" FontWeight="Bold" FontSize="22pt" FontFamily="Calibri"/> <TextBlock Text="{Binding Path=LevsAttBeskr}" FontSize="18pt" FontFamily="Calibri"/> </StackPanel> <!--Pick Quantity--> <StackPanel Grid.Column="1" VerticalAlignment="Center"> <TextBlock Text="{Binding Path=Antal}" FontSize="44pt" FontFamily="Calibri"/> </StackPanel> <!-- Checkbox--> <StackPanel Grid.Column="2" VerticalAlignment="Center" HorizontalAlignment="Center"> <ToggleButton Name="Check" Width="40" Height="40" Click="Check_Click" Tag="{Binding Path=Plocklista}"> <ToggleButton.Style> <Style TargetType="ToggleButton"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ToggleButton}"> <Border x:Name="InnerBorder" Background="White" BorderBrush="Black" BorderThickness="1"/> <ControlTemplate.Triggers> <Trigger Property="IsChecked" Value="True"> <Setter TargetName="InnerBorder" Property="Background"> <Setter.Value> <ImageBrush ImageSource="/Images/button_ok.png"/> </Setter.Value> </Setter> <Setter TargetName="InnerBorder" Property="BorderThickness" Value="0"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> </ToggleButton.Style> </ToggleButton> </StackPanel> </Grid> <Border BorderBrush="Darkgray" BorderThickness="0,0,1,0"> </Border> <TextBlock Width="100" Text="{Binding Path=Quantity}" FontSize="44pt" FontFamily="Calibri"/> <CheckBox Width="78"/> </StackPanel> </Border> </StackPanel> </DataTemplate>

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  • Websphere CE issue in Eclipse EE

    - by Moev4
    I have downloaded the Websphere 2.1 App Server and verified that it works fine. I now wanted to use eclipse EE to manage it by adding the server to the server tab. Everything seems to work fine when going through the setup but when I go to start the server I get the error message: ERROR [GBeanInstanceState] Error while starting; GBean is now in the FAILED state: abstractName="org.apache.geronimo.framework/j2ee-system/2.1.4/car?ServiceModule=org.apache.geronimo.framework/j2ee-system/2.1.4/car,j2eeType=AttributeStore,name=AttributeManager" java.io.IOException: Unable to write manageable attribute files to directory /opt/IBM/WebSphere/AppServerCommunityEdition/var/config at org.apache.geronimo.system.configuration.LocalAttributeManager.ensureParentDirectory(LocalAttributeManager.java:573) at org.apache.geronimo.system.configuration.LocalAttributeManager.load(LocalAttributeManager.java:327) .... I was wondering if anyone had experience with this particular issue?

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  • Python - which multi platform GUI framework to use?

    - by Iacopo
    Hi, I've written a Python GUI application and made it run on Linux, Windows and Mac. The framework I'm using is PyGtk. The final result is not really good: the application looks horrible on Mac, and it is not really 'native' neither on Windows. Furthermore on Mac the windows' behavior is sometimes wrong, with modal dialogs appearing below the main windows. I've explored other frameworks and I've found that a porting may be really hard: PyQt it is huge, difficult to install and to distribute under Mac; PyGui is poor: I need tables and tree views at least; wxPython state explicitly that you have to use a custom python build for Mac Tkinter: didn't check it, only have the impression that it is obsolete I know this question may appear similar to http://stackoverflow.com/questions/394039/which-python-gui-framework but in that thread the portability issue is not really taken in account. Windows and Mac are a must, since most of my user have that systems. Can you also suggest some books?

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  • Java: InitialContext.lookup(String) - what should the value o the parametr be?

    - by bguiz
    To instantiate a Stateful Session Bean inside of a JSP/ servlet, I am using: InitialContext ic = new InitialContext(); SomeStateful state = (SomeStateful) ic.lookup("java:comp/env/SomeStatefulBean"); Trial and error had me prefix the name of my EJB with java:comp/env/, so the above works (on Glassfish 2.1). However I want to know what the proper way to obtain this prefix is. Is there a CLI tool or function somewhere in the admin panel that will allow we to examine/ alter this? Is this platform/ application server dependant? Is there a setting within my ear, EJB-jar or war which I can examine or alter for this? (Forgive the beginner question) Thanks!

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  • Is there a way to determine if a <select> dropdown menu is open?

    - by Robert
    I'm looking for a way to determine if/when a <select> element's menu is open. I don't need to force it to open or close, just figure out if it's open or closed at a given time. I can listen to events for focus/blur, mouseup/mousedown, etc., but I don't think I can reliably figure out the state of the menu from those events. For example, mousedown followed by mouseup could mean the user clicked and dragged to a selection and released (in which case the menu is now closed) or clicked and released to open the menu (in which case the menu is open). It also seems likely that the specific behavior of dropdown menus is browser-dependent. I know I could do this if I roll my own dropdown menu, but I prefer to use <select>. Is there a reliable way to find out if a dropdown menu is open? Or is this something that Javascript can't know?

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  • How can I force input to uppercase in an asp.net textbox?

    - by Aheho
    I'm writing an asp.net application. I have a textbox on a webform and I want to force whatever the user types to upper case. I'd like to do this on the front end. You should also note that there is a validation control on this textbox, so I want to make sure the solution doesn't interfere with the asp.net validation. Clarification: It appears that the CSS text-tranform makes the user input appear in uppercase, however under the hood, it's still lower case as the validation control fails. You see, my validation control checks to see if a valid state code is entered, however the regex expression I"m using only works with uppercase characters.

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  • Java Socket Disconnect Reporting vs. C# Disconnection

    - by ikurtz
    in C# when a sockets connection is terminated the other node is informed of this before terminating the link thus the remaning node can update the connection status. in Java when i terminate a communication link the other node keeps reporting the connection as valid. do i need to implement a read cycle (makes sense) that reports the connection as lost when it recieves a -1 during read (in C# this is 0 i think)? thank you for your insight. EDIT: thanks to you both. as i suspected and mentioned in my post that an additional check is required to confirm the connected state of a connection.

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  • count(*) is it really expensive ?

    - by Anil Namde
    I have a page where i have 4 tabs displaying 4 different reports based of different tables. Now i get row count of each tabled using select count() from table query and display number of rows available in each table on the tabs. Now with each page post back 5 count() queries are executed (4 to get counts and 1 for pagination) and 1 query for getting report. Now my question is should is count(*) query really expensive that i should keep the row counts (at least which are displayed on tab) in view state of page instead of queering each time? How much expensive it is ?

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  • Change cell color in Excel according to adjacent dropdown value

    - by Andrew Heath
    I understand how to make a dropdown list. I understand how to make conditional formatting change the color of a cell. What I do not understand is how to make conditional formatting change the color of a cell based solely on the state of another cell (not a comparison). A1 is a No / Yes dropdown list B1 is a criteria statement If the user satisfies the criteria statement in B1, they select Yes on the dropdown list in A1. For quick reference, if possible, I'd like B1 to change to a green background color on this event... and of course change back to no-fill if the dropdown is reset to No. Is this possible in Excel 2003 and/or 2007?

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  • HttpURLConnection getting locked

    - by Nayn
    Hi, I have a thread running under tomcat which creates a HttpUrlConnection and reads it through BufferedInputStream. After fetching data for some urls, it stalls. I got the jstack of the process which says HttpUrlConnection is locked and BufferedInputStream is also locked. "http-8080-1" daemon prio=10 tid=0x08683400 nid=0x79c9 runnable [0x8f618000] java.lang.Thread.State: RUNNABLE at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:129) at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) at java.io.BufferedInputStream.read1(BufferedInputStream.java:258) at java.io.BufferedInputStream.read(BufferedInputStream.java:317) - locked <0x956ef8c0> (a java.io.BufferedInputStream) at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:687) at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:632) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1072) - locked <0x956ef910> (a sun.net.www.protocol.http.HttpURLConnection) Could somebody help here. Thanks

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  • AJAX: Statusbar: force update of UpdatePanel while function executes

    - by John Bourke
    Hi Guys, I have a label inside an update panel which I wouldl ike to use as a status bar. Basically the user clicks a button which executes a main fucntion that performs a series of tasks. I'd like to inform the user as to the state of the function as it progresses e.g.: Stage 1: Retrieving data... Stage 2: Calculating values... Stage 3: Printing values... Stage 4: Done! I've tried updating the updatepanel directly from the function but it only updates the panel at the end of function (stage 4) and shows "Done!" (which I understand is how it should work). I've been looking into timers and threads to try and update the panel seperate to the main function but I thought I'd post here incase anyone has any better ideas? Thanks for any help in advance! John bourkeyo is offline Reply With Quote

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  • Django: Geocoding an address on form submission?

    - by User
    Trying to wrap my head around django forms and the django way of doing things. I want to create a basic web form that allows a user to input an address and have that address geocoded and saved to a database. I created a Location model: class Location(models.Model): address = models.CharField(max_length=200) city = models.CharField(max_length=100) state = models.CharField(max_length=100, null=True) postal_code = models.CharField(max_length=100, null=True) country = models.CharField(max_length=100) latitude = models.DecimalField(max_digits=18, decimal_places=10, null=True) longitude = models.DecimalField(max_digits=18, decimal_places=10, null=True) And defined a form: class LocationForm(forms.ModelForm): class Meta: model = models.Location exclude = ('latitude','longitude') In my view I'm using form.save() to save the form. This works and saves an address to the database. I created a module to geocode an address. I'm not sure what the django way of doing things is, but I guess in my view, before I save the form, I need to geocode the address and set the lat and long. How do I set the latitude and longitude before saving?

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  • jquery Ajax $.ajaxError

    - by cf_PhillipSenn
    I have a bunch of ajax calls that contain success and error conditions like this one: $.ajax({ url: 'Remote/State.cfc' ,type: "POST" ,data: { 'method': 'UpdateStateName' ,'StateID': StateID ,'StateName': StateName } ,success: function(result){ if (isNaN(result)) { $('#msg').text(result).addClass('err'); } else { $('#' + result + ' input[name="StateName"]').addClass('changed'); }; } ,error: function(msg){ $('#msg').text('Connection error').addClass('err'); } }); All the error conditions are the same. In other words, they all put the phrase "Connection error" in the msg id. Q1: Could I remove all these and replace them with $().ajaxError(function(myEvent, request, settings, thrownError) { $('#msg').text('Connection error').addClass('err'); }); Q2: How would you use myEvent and request to display a more informative error message?

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  • How to reset all the values after completion of the game, before starting it again ?

    - by srikanth rongali
    I have writing a small shooting game in cocos2d. Winning the game is to eliminate all the 10 enemies. After that end screen comes showing 'You Won' and 'Play Again'. If I go for 'Play Again' option the game is starting from where I need. But, the problem is that the game is continuing from previously ended state. I mean it is not starting from enemy 1 again instead it is just showing the end of 10 enemy. I think I have to reset all the values before pushing the scene. But should I reset all the values I have used or there is any other way ? Thank You.

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  • How to stop an Android Service ONLY when there are no other activities in my app running?

    - by johnrock
    Is there a way I can test if there are any other activities in my app still alive? I am looking to stop a service in an onDestroy method, but only want to do this if there are no other activities from my app still alive on the stack. I have the call stop the service in the main activity's onDestroy() method. This works perfect EXCEPT that if a user launches my app, then launches a few activities in my app, then hits the home screen and RELAUNCHES my app, they will subvert my order and the main activity will now be above other activities of my app. From this state, if they hit the back button and 'back out' of my home screen they will trigger the onDestroy() method and kill the service even though there are other activities open on the stack. I want to avoid this by stopping the service ONLY if I am sure there are no other activities of mine open on the stack. Possible?

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  • How do I access the data in JSON converted to hash by crack in ruby?

    - by Angela
    Here is the example from the crack documentation: json = '{"posts":[{"title":"Foobar"}, {"title":"Another"}]}' Crack::JSON.parse(json) => {"posts"=>[{"title"=>"Foobar"}, {"title"=>"Another"}]} But how do I actually access the data in the hash? I've tried the following: array = Crack::JSON.parse(json) array["posts"] array["posts"] shows all the values, but I tried array["posts"]["title"] and it didn't work. Here is what I am trying to parse as an example: {"companies"=>[{"city"=>"San Mateo", "name"=>"Jigsaw", "address"=>"777 Mariners Island Blvd Ste 400", "zip"=>"94404-5059", "country"=>"USA", "companyId"=>4427170, "activeContacts"=>168, "graveyarded"=>false, "state"=>"CA"}], "totalHits"=>1} I want to access the individual elements under companies....like city and name.

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  • No Carbon Human-Interface-Toolbox in OSX 64-bit binaries?

    - by yairchu
    I get the impression that Carbon Human Interface Toolbox does not work in 64-bit binaries. Apple's documentation says: The Carbon Help Manager is not available to 64-bit applications. ... The Control Manager is not available to 64-bit applications. ... The Data Browser is not available to 64-bit applications. ... I just want to verify that: There is no work-around around this. If this is simply the case. Why don't Apple's documentation simply state it as such?

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  • TypeError while iterating through a Hash

    - by Ved
    I have the following hash: {"groups"=>[{"type"=>"Nearby", "venues"=>[{"id"=>4450132, "name"=>"Position2", "address"=>"Domlur", "city"=>"Bangalore", "state"=>"Karnataka/India", "zip"=>"560037", "verified"=>false, "geolat"=>12.9566921, "geolong"=>77.6407258, "stats"=>{"herenow"=>"0"}, "twitter"=>"position2", "hasTodo"=>"false", "distance"=>0},... I want to iterate through it and find all the 'name' attributes. My code looks like: response["groups"]["Nearby"]["venues"].each do |key| logger.debug key['name'] end But I keep on getting error: TypeError (can't convert String into Integer): I am on ruby 1.9.

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  • F# Extention Methods on Lists, IEnumberable, etc

    - by flevine100
    I have searched StackOverflow (and other sources) for this answer, but can't seem to find anything. In C#, if I had a widget definition, say: class widget { public string PrettyName() { ... do stuff here } } and I wanted to allow for easy printing of a list of Widgets, I might do this: namespace ExtensionMethods { public static PrintAll( this IEnumerable<Widget> widgets, TextWriter writer ) { foreach(var w in widgets) { writer.WriteLine( w.PrettyName() ) } } } How would I accomplish something similar with a record type and a collection (List or Seq preferrably in F#). I'd love to have a list of Widgest and be able to call a function right on the collection that did something like this. Assume (since it's F#) that the function would not be changing the state of the collection that it's attached to, but returning some new value.

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  • Elements are listed in a vob but not able to checkout/checkin in CCRC

    - by sunil devan
    Hi, There are 2 windows domains named as OPR & BDC. In OPR domain the CCRC server is hosted, users accessing from BDC domain can able to connect to CCRC and list the vob....and also able to join the project. To perform any checkout/checkin/loading resources it is taking long time and after a day it is in same state.Connectivity is fine to OPR domain from BDC domain ( ping & tracrt is working fine) . Could you please let me know if you have some idea about it? Thanks, Sunil

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  • Making sure unsigned int/long always execute in checked context in C#

    - by theburningmonk
    Has anyone found it strange that the default context for uint and ulong is unchecked rather than checked considering that they are meant to represent values that can never be negative? So if some code is trying to violate that constraint it seems to me the natural and preferred behaviour would be to throw an exception rather than returning the max value instead (which can easily leave important pieces of data in an invalid state and impossible to revert..). Is there an existing attribute which can be applied to either class/assembly so that it always performs arithmetic operations in a checked context? I was thinking of writing one myself (as an aspect using PostSharp) but would be great if there's one already. Many thanks,

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  • GCC/XCode equivalent of _CrtCheckMemory?

    - by Chris Becke
    When dealing with random memory overwrites, in MSVC it is possible to validate the state of the heap at various points with a call to _CrtCheckMemory, and know with at least a small level of confidence that the code up until the check was not responsible for any errors that might cause new or malloc to fail later. In XCode, whats the equivalent way to try and box in a memory overwrite? All I have at the moment is a random failure of a call to new, somewhere deep in the bowels of some code with no real idea of how long the code has been running with a corrupt heap up until that point.

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  • iphone tabbar with custom buttons and scrollvie

    - by chunjai
    i'm trying to get a tab bar effect not unlike russel quinn's 'creative review' app. the tabbar swipes across, which i have figured out, but the tabbar style itself is unlike anything i've seen on the iphone (though it looks so simple!). it has square buttons with a space between, and each button has a select/active/inactive state. i'm having a hard time seeing how this can be tabbar, but i don't know any other way. can someone explain this? here's the example :: http://bit.ly/c8CeBC. any help is appreciated.

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