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  • hibernate not throwing stale state exception nor it is overwriting data

    - by Reddy
    Our application do the following. 1. Start the transaction. 2. Execute a query using prepared statement 3. Check a condition to see the number of rows updated are equal to the required number. 4. It commits on success of above condition otherwise it will roll back However the problem is that when two threads are simultaneously enter this code. Thread-1 is updating a row in step 2. It checked the condition and committed successfully since the condition is successful. Thread-2 started execution somewhere between steps 1 & 4, and it is failing on at condition checking at step 3 (as it is getting number of updated rows as 0). I expected second thread to throw an exception but it is not. What could be the problem?

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  • Implementing simple business model in Haskell

    - by elmes
    Supose we have a very simple model: Station has at least one Train Train has at least two Stations The model has to allow to check what stations any given train visits and to check what trains visit a particular station. How to model it in Haskell? I am a Haskell newbie, so please correct me: once an object is created, you cannot modify it - you can only make a new object based on that one (~immutability). Am I right? If so, I'll have to create a lot of temporary variables with semi-initialized objects (during deserialization or even in unit tests). Basically what I need is an example of modeling domain classes in Haskell - after reading "Learn you a haskell.." I still have no idea how to use this language.

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  • Fastest way to represent a collection of bits in PHP?

    - by Piskvor
    What is a good way to represent a collection of bits? I have a set of various on/off toggles (thousands of them) and need to store and retrieve their state. The naïve implementation would be an array of booleans, but I'm wondering if there's a better way (better in terms of access speed and/or memory requirements). I've found this BitArray implementation, but it's limited to 32 bits, which is not enough for this case.

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  • One intent is working, second is giving me a crash

    - by user1480742
    ok, so both intents receiver sides are on the same activite and they are sending from different ones....second one is not working, first one does, dont know why...all 3 activites are ok in manifest and all that //second intent on senders side public void onItemSelected(AdapterView<?> arg0, View users, int i, long l) { FILENAME = (adapter.getItem(i)).toString(); Bundle viewBag2 = new Bundle(); viewBag2.putString("profile_name", FILENAME); Intent b = new Intent(OptionsMenu.this, CoreActivity.class); b.putExtras(viewBag2); startActivity(b); } //second intent on receiver side private void Data_transfer() { Bundle gotbasket2 = getIntent().getExtras(); profileName = gotbasket2.getString("profile_name"); } //first (working intent) on senders side public void onClick(View v) { Bundle viewBag = new Bundle(); viewBag.putString("spinner_result", s); a.putExtras(viewBag); } //first (working intent) on receiver side private void Data_transfer() { // TODO Auto-generated method stub Bundle gotbasket = getIntent().getExtras(); x = gotbasket.getString("spinner_result"); } 06-26 20:22:09.787: D/AndroidRuntime(1802): Shutting down VM 06-26 20:22:09.787: W/dalvikvm(1802): threadid=1: thread exiting with uncaught exception (group=0x40015560) 06-26 20:22:09.847: E/AndroidRuntime(1802): FATAL EXCEPTION: main 06-26 20:22:09.847: E/AndroidRuntime(1802): java.lang.RuntimeException: Unable to start activity ComponentInfo{mioc.diver/mioc.diver.CoreActivity}: java.lang.NullPointerException 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.os.Handler.dispatchMessage(Handler.java:99) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.os.Looper.loop(Looper.java:123) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.main(ActivityThread.java:3683) 06-26 20:22:09.847: E/AndroidRuntime(1802): at java.lang.reflect.Method.invokeNative(Native Method) 06-26 20:22:09.847: E/AndroidRuntime(1802): at java.lang.reflect.Method.invoke(Method.java:507) 06-26 20:22:09.847: E/AndroidRuntime(1802): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 06-26 20:22:09.847: E/AndroidRuntime(1802): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 06-26 20:22:09.847: E/AndroidRuntime(1802): at dalvik.system.NativeStart.main(Native Method) 06-26 20:22:09.847: E/AndroidRuntime(1802): Caused by: java.lang.NullPointerException 06-26 20:22:09.847: E/AndroidRuntime(1802): at mioc.diver.CoreActivity.Data_transfer(CoreActivity.java:189) 06-26 20:22:09.847: E/AndroidRuntime(1802): at mioc.diver.CoreActivity.onCreate(CoreActivity.java:88) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 06-26 20:22:09.847: E/AndroidRuntime(1802): ... 11 more

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  • java: copy-on-write data structure?

    - by Jason S
    Is there anything in Java that implements something like the following interface MSet<T> extends Iterable<T> { /** * return a new set which consists of this set plus a new element. * This set is not changed. */ MSet<T> add(T t); /** * return a new set which consists of this set minus a designated element. * This set is not changed. */ MSet<T> remove(T t); }

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  • Model a Zero or One to Many Relationship

    - by John
    How should I model a zero or one to a many relationship in the database? For example, a user record may or may not have a parent. So should my user table have a t_user.parent_id or should I have an associative table called t_user_hierarchy with the columns t_user_hierarchy.parent_id and t_user_hierarchy.user_id?

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  • Group MySQL Data into Arbitrarily Sized Time Buckets

    - by Eric J.
    How do I count the number of records in a MySQL table based on a timestamp column per unit of time where the unit of time is arbitrary? Specifically, I want to count how many record's timestamps fell into 15 minute buckets during a given interval. I understand how to do this in buckets of 1 second, 1 minute, 1 hour, 1 day etc. using MySQL date functions, e.g. SELECT YEAR(datefield) Y, MONTH(datefield) M, DAY(datefield) D, COUNT(*) Cnt FROM mytable GROUP BY YEAR(datefield), MONTH(datefield), DAY(datefield) but how can I group by 15 minute buckets?

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  • quaring larg text file containing JSON objects.

    - by Maciek Sawicki
    Hi, I have few Gigabytes text file in format: {"user_ip":"x.x.x.x", "action_type":"xxx", "action_data":{"some_key":"some_value"...},...} each entry is one line. First I would like to easily find entries for given ip. This part is easy because I can use grep for example. However even for this I would like to find better solution because I would like to get response as fast as possible. Next part is more complicated because I would like to find entries from selected ip and of selected type and with particular value of some_key in action_data. Probably I would have to convert this file to SQL db (probably SQLite, because it will be desktop APP), but I would ask if there are exists better solutions?

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  • How to use NSPredicate with Key-Paths (and ALL)?

    - by Konstantin
    Taking example from Apple docs using predicates with Key-Paths NSPredicate *predicate = [NSPredicate predicateWithFormat:@"ANY employees.firstName like 'Matthew'"]; Now, assume the employees has a bool field "isGood". The question: how do I select just those entities, having ALL of employees isGood==TRUE? I tried but failed with following predicates: "!(ANY employees.isGood != TRUE)" "(ALL employees.isGood == TRUE)" // Would be perfect, but throws an exception..

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  • Displaying a To-Many Relationship in a Table View

    - by DanF
    I've got an application I've been working on. There are projects and employees, projects can have several employees, employees can work on several projects. Right now I want selecting a project to display which employees are related to it, and allows me to add employees I select from another full-roster list. Somehow, this has proven more complicated, because (at least for now), selecting different projects still displays the same list of employees, as if all employees who'd been assigned to any project, belong to all of them. What part of Master-Detail am I missing?

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  • list or container O(1)-ish insertion/deletion performance, with array semantics

    - by Chris Kaminski
    I'm looking for a collection that offers list semantics, but also allows array semantics. Say I have a list with the following items: apple orange carrot pear then my container array would: container[0] == apple container[1] == orangle container[2] == carrot Then say I delete the orange element: container[0] == apple container[1] == carrot I don't particularly care if sort order is maintained, I'd just like the array values to function as accelerators to the list items, and I want to collapse gaps in the array without having to do an explicit resizing.

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  • NSFetchedResultsController deallocated instance

    - by Jesse Armand
    Anyone ever encountered this ? -[NSFetchedResultsController _restoreCachedSectionInfo]: message sent to deallocated instance While performing fetch with performFetch: using NSFetchedResultsController instance. I'm sure the NSFetchedResultsController is retained before performing the fetch.

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  • jquery dropdownbox auto populated with mysql data

    - by Xin
    I've got 2 dropdownboxes. Dropdownbox 1 shows all the tables from a database. When dropdownbox 1 is selected; dropdownbox 2 will be populated with tablefields from the selected table. dropdownbox 1: This dropdown is populated with the following mysql query: "show tables from testdb" dropdownbox 2: This dropdown will auto populate when dropdownbox 1 is selected. Dropdownbox 2 will be populate with the following query: "describe tablename" //tablename selected from dropdownbox 1 I want to make this using jquery. Can anyone point me into the right direction?

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  • reRendering is not happening in jsf using data table

    - by palakolanusrinu
    HI, Rerendering is not working in my code please help in this <rich:dataTable id="bookIncome" value="#{myBean.ftBoookIncomelst}" var="item" rowKeyVar="row" first="0" width="100%"> <rich:subTable id="subBookIncome"value="#{item.txIncome}" var="income" rowKeyVar="row"> <rich:column id="descrtiptionColumn" width="30%"> <h:outputText value="#{income.descriptionCell.value}" rendered="#{!item.editableRow}" style="#{income.descriptionCell.boldClass}"> </h:outputText> <rich:inplaceInput layout="block" value="#{income.descriptionCell.value}" required="true" rendered="#{item.editableRow}" requiredMessage="Description at row #{row+1} wasn't filled." changedHoverClass="hover" viewHoverClass="hover" viewClass="inplace" changedClass="inplace" selectOnEdit="true" editEvent="onclick"> </rich:inplaceInput> In the above code i have proper id for datatable and i'm calling my ajax call using But its not showing any response but its hitting the server and its calling proper method and updating the required list also..Please help in this why its not rendering its not showing any exception on console also...

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  • Question on Binary Search Trees.

    - by AGeek
    Hi, I was thinking of implementing a binary search trees. I have implemented some very basic operations such as search, insert, delete. Please share your experiences as to what all other operations i could perform on binary search trees, and some real time operations(basic) that is needed every time for any given situation.. I hope my question was clear.. Thanks.

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  • How to parse json data in Python?

    - by backcross
    Please help me to parse this json in python. { "IT" : [ { "firstName" : "ajay", "lastName" : "stha", "age" : 24 }, { "firstName" : "Michiel", "lastName" : "Og", "age" : 35 } ], "sales" : [ { "firstName" : "Guru", "lastName" : "red", "age" : 27 }, { "firstName" : "Jim", "lastName" : "Galley", "age" : 34 } ] } How to parse this json in Python?Please help me

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  • Using POST or SESSION to capture data

    - by Karinne
    Hi all! I'm currently working on web application using VB in ASP.NET. Right now I have 1 page with panels that we are using to show/hide depending on the flow. When the user first comes in, he/she is presented with a gridview containing a list of clients. Then the user, clicks a link from a row and is presented a form where he/she can update the clients' info. Originally, I had a HYPERLINKFIELD that put the clientId in the url, then I'd grab the url and do the code appropriately <asp:HyperLinkField Text='<%$ Resources:Resource, ManageClient %>' DataNavigateUrlFields="CLIENT_ID" DataNavigateUrlFormatString="~/clients/manage.aspx?clientId={0}" /> Now, I'm rethinking that and wondering if it's better to use SESSIONs to grab the clientID via this instead <asp:TemplateField Visible="false"><ItemTemplate><asp:Label runat="server" ID="hidClientId" Text='<%# Bind("CLIENT_ID")%>' Visible="false" /></ItemTemplate></asp:TemplateField> <asp:ButtonField Text='<%$ Resources:Resource, ManageClient %>' CommandName="Manage" /> Or use the POST method, which I'm not sure how it works in .NET (but I've used it in PHP) Any help would be greatly appreciated.

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  • Need sorted dictionary designed to find values with keys less or greater than search value

    - by Captain Comic
    Hi I need to have objects sorted by price (decimal) value for fast access. I need to be able to find all objects with price more then A or less than B. I was thinkg about SortedList, but it does not provide a way to find ascending or descending enumerator starting from given key value (say give me all objects with price less than $120). Think of a system that accepts items for sell from users and stores them into that collection. Another users want to find items cheaper than $120. Basically what i need is tree-based collection and functionality to find node that is smaller\greater\equal to provided key. Please advice.

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  • Returning data from SQL Server reporting web service call

    - by user79339
    Hi, I am generating a report that contains the version number. The version number is stored in the DB and retrieved/incremented as part of the report generation. The only problem is, I am calling SSRS via a web service call, which returns the generated report as a byte array. Is there any way to get the version number out of this generated report? For example to display a dialog that says "You generated Status Report, Version number 3". I tried passing in an output parameter and setting it inside the storedproc. Its modified when i execute it in sql management studio, but not in the reporting studio. Or atleast i can't seem to bind to the modified, post execution value (using expression "=Parameters!ReportVersion.Value"). Of course, I could get/increment the version number from database myself before calling the SSRS webservice and pass it along as a parameter to the Report, but that might cause concurrancy problems. On the whole, it just seems neater for the storedproc to access/generate a version number and return it to the ReportingEngine, which will generate the report with the version number and return the updated version number to the WebService client. Any thoughts/Ideas?

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  • Export the datagrid data to text in asp.net+c#.net

    - by SRIRAM
    Problem:It will asks there is no assembly reference/namespace for Database Database db = DatabaseFactory.CreateDatabase(); DBCommandWrapper selectCommandWrapper = db.GetStoredProcCommandWrapper("sp_GetLatestArticles"); DataSet ds = db.ExecuteDataSet(selectCommandWrapper); StringBuilder str = new StringBuilder(); for(int i=0;i<=ds.Tables[0].Rows.Count - 1; i++) { for(int j=0;j<=ds.Tables[0].Columns.Count - 1; j++) { str.Append(ds.Tables[0].Rows[i][j].ToString()); } str.Append("<BR>"); } Response.Clear(); Response.AddHeader("content-disposition", "attachment;filename=FileName.txt"); Response.Charset = ""; Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.ContentType = "application/vnd.text"; System.IO.StringWriter stringWrite = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite); Response.Write(str.ToString()); Response.End();

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  • how to format the data inside the DataGridTemplateColumn in datagrid

    - by prince23
    hi, this is my xaml code where i have 2 fields placed under one template column. now i am getting the format the output like this so that i can specify the space betweeen these 2 columns Color red image1 green image2 green image2 white image6 so that output looks good. How can i define space between them so that it looks like the above one right now thw output is like this color Redimage1 greenimage2 greenimage2 whiteimage6 <sdk:DataGridTemplateColumn Header="Color" Width="80"> <sdk:DataGridTemplateColumn.CellTemplate> <DataTemplate> <StackPanel Loaded ="StackPanel_Loaded" Orientation="Horizontal" Background="Transparent"> <TextBlock Text="{Binding Color}" TextWrapping="NoWrap" HorizontalAlignment="Center" Foreground="Blue"></TextBlock> <Image x:Name="imgTargetScore" Source ="{Binding ColorImage}" Width="20" Height="20" Stretch ="Fill"/> </StackPanel> </DataTemplate> </sdk:DataGridTemplateColumn.CellTemplate> </sdk:DataGridTemplateColumn> loking forward for an solution thanks in advance prince

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  • Getting RAW Soap Data from a Web Reference Client running in ASP.net

    - by Harry
    I'm trying to trouble shoot a web service client in my current project. I'm not sure of the platform of the Service Server (Most likely LAMP). I believe there is a fault on their side of the fence as i have eliminated the potential issues with my client. The client is a standard ASMX type web reference proxy auto generated from the service WSDL. What I need to get to is the RAW SOAP Messages (Request and Responses) What is the best way to go about this?

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  • How to find longest common substring using trees?

    - by user384706
    The longest common substring problem according to wiki can be solved using a suffix tree. From wiki: The longest common substrings of a set of strings can be found by building a generalised suffix tree for the strings, and then finding the deepest internal nodes which have leaf nodes from all the strings in the subtree below it I don't get this. Example: if I have: ABCDE and XABCZ then the suffix tree is (some branches from XABCZ omitted due to space): The longest common substring is ABC but it is not I can not see how the description of wiki helps here. ABC is not the deepest internal nodes with leaf nodes. Any help to understand how this works?

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  • Why Could Linq to Sql Submit Changes Fail for Updates Despite Data in Change Set

    - by KevDog
    I'm updating a set of objects, but the update fails on a SqlException that says "Incorrect Syntax near 'Where'". So I crack open SqlProfiler, and here is the generated SQL: exec sp_executesql N'UPDATE [dbo].[Addresses] SET WHERE ([AddressID] = @p0) AND ([StreetAddress] = @p1) AND ([StreetAddress2] = @p2) AND ([City] = @p3) AND ([State] = @p4) AND ([ZipCode] = @p5) AND ([CoordinateID] = @p6) AND ([CoordinateSourceID] IS NULL) AND ([CreatedDate] = @p7) AND ([Country] = @p8) AND (NOT ([IsDeleted] = 1)) AND (NOT ([IsNonSACOGZip] = 1))',N'@p0 uniqueidentifier,@p1 varchar(15),@p2 varchar(8000),@p3 varchar(10),@p4 varchar(2),@p5 varchar(5),@p6 uniqueidentifier,@p7 datetime,@p8 varchar(2)',@p0='92550F32-D921-4B71-9622-6F1EC6123FB1',@p1='125 Main Street',@p2='',@p3='Sacramento',@p4='CA',@p5='95864',@p6='725E7939-AEE3-4EF9-A033-7507579B69DF',@p7='2010-06-15 14:07:51.0100000',@p8='US' Sure enough, no set statement. I also called context.GetChangeSet() and the proper values are in the updates section. Also, I checked the .dbml file and all of the properties Update Check values are 'Always'. I am completely baffled on this one, any help out there?

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