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  • Saving objects in servlet session and java.io.NotSerializableException

    - by EugeneP
    SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writi ng aborted; java.io.NotSerializableException: That means this object cannot be persisted on hard disk. Does it imply that it's not safe to keep in Session objects that do not implement "Serializable"? I haven't heard that there are limitations on saving non-serializable objects in Session object. It simply means that Tomcat will always keep them in memory, right?

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  • Saving objects in servlet session and java.io.NotSerializableException

    - by EugeneP
    SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writi ng aborted; java.io.NotSerializableException: That means this object cannot be persisted on hard disk. Does it imply that it's not safe to keep in Session objects that do not implement "Serializable"? I haven't heard that there are limitations on saving non-serializable objects in Session object. It simply means that Tomcat will always keep them in memory, right?

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  • how to find out which textbox is currenlty selected.

    - by abcdefghijklmnopqrstuvwxyz
    I have 3 text-boxes, how do I find out which text-box is currently selected (has focus). I am unable to come up with anything. Public Class Form1 Public activeTextBox As TextBox = CType(Me.ActiveControl, TextBox) Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click activeTextBox.Text = activeTextBox.Text & "This is text 1" End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click activeTextBox.Text = activeTextBox.Text & "This is the text 2" End Sub End Class

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  • Impromptu conditional display of dtpicker

    - by pritisolanki
    Hi, I have two checkbox on prompt box i.e If user click yes I have to show dtpicker and user click no hidden the dtpicker. I tried following $('#yes').click(function(){$('#dtpickerdiv').css("display","block");}); but the hidden div doesn't appear on prompt box? I tried alerting following alert -$(‘#dtpickerdiv’).css(“display”) : This alert “undefined” alert – $(‘#dtpickerdiv’)) : “object object Any idea how to resolve this? Regards, Priti

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  • How value objects are saving and loading?

    - by yeraycaballero
    Since there isn't respositories for value objects. How can I load all value objects? Suppose we are modeling a blog application and we have this classes: Post (Entity) Comment (Value object) Tag (Value object) PostsRespository (Respository) I Know that when I save a new post, its tags are saving with it in the same table. But how could I load all tags of all posts. Has PostsRespository got a method to load all tags? I usually do it, but I want to know others opinions

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  • how to implement a message pump in Non-UI thread in .net?

    - by Benny
    how to implement a message pump in non-ui thread? what i want is that the message can be an object or a command, say an Action/Func, etc. do i have to use separate queue for different type of message? say one queue for object, one queue for Action/Function? Given that the type of messages vary, how to implement it?

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  • Why can't i access page viewstate in usercontrol?

    - by Rohit
    I stored a object in viewstate on Page. Now when i access the same viewsate object on usercontrol,it shows as null. I even tried creating the same viewstate with same name in usercontrol and page.Both holds different value. I understand that viewstate is a protected property. How does this thing implement in above scenerio or is there any other reason for this behaviour.

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  • basics of c++ encapsulation

    - by sasquatch
    I have a task to create class Encapsulation, with fields in available encapsulation sections. Then I must create an application showing all allowed and forbidden methods of fields access. What are the encapsulations sections in c++ ? And what methods apart from object.field or *object-field are there anyway ?

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  • What pattern to use in this scenario?

    - by jess
    Hi, We have got many forms(windows app C#) in our application.We have similar steps in most of them - user adds a new object(in a grid),fills values and save.On,save,we validate,and save if everything ok,else show message.Now,adding of object usually means we add a new row with some default values.

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  • Missing Project templates in XCode

    - by coure06
    I have installed xcode 3.2 with iphone SDK. (without Mac OS 10.4 SDK). WHen i create new project i only got these options for Mac OS -- Application -- Framework and Library -- Application plugin -- System plugin --Other But a book named: Programming Object C 2.0. From which i am learning object C. Its showing XCode with these templates for Mac OS --Application --Audio Units --Automater actions --Bundles --Command Line Utility --dynamic library --Framework --Java --Kernal Extensions --Standard Apple plugin --Static Library --Other I need the Command Line Utility template so that can create sample projects mentioned in book.

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  • the selector in JavaScript

    - by Small Wolf
    I want to get the object of this code , <input class="radio" id="conversation_sub_kind_id_208" name="conversation[sub_kind_id]" onclick="set_department_name('department_name208')" type="radio" value="208" /> I want to use jQuery Framework to get the object, like the document.getElementbyTagName("conv..."); what should i do in here? Thank you, and best regards!

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  • Generics and anonymous type

    - by nettguy
    I understood,normally generics is for compile time safe and allow us to keep strongly typed collection.Then how do generic allow us to store anonymous types like List<object> TestList = new List<object>(); TestList.Add(new { id = 7, Name = "JonSkeet" }); TestList.Add(new { id = 11, Name = "Marc Gravell" }); TestList.Add(new { id = 31, Name = "Jason" });

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  • What does "Contract can't be in try block" mean?

    - by MatthewMartin
    I'm using the 3.5 library for microsoft code contracts public object RetrieveById(int Id) { Contract.Ensures(newObject != null, "object must not be null"); return newProject; //No error message if I move the Contract.Ensures to here //But it isn't asserting/throwing a contract exception here either } I get the compiler message: "Error 18 Contract section within try block in method 'Controller.RetrieveById(System.Int32)'

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  • Can we instantiate abstract class?

    - by satheesh.droid
    I don't understand whether we can instantiate abstract class by any means because I have read we can inherit the abstract class but in have found we can create an object by calling method of other class.For example LocationProvider is an abstract class but we can create object for the same by calling getProvider() function in LocationManager class. By the following code LocationManager lm=getSystemService(Context.LOCATION_PROVIDER) LocationProvider lp=lm.getProvider("gps");

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  • Alternatives of Datatable

    - by mavera
    In my web application, I have a dynamic query that returns huge data to datatable, and this query is often recalled with different parameters. So database is exhausted. I want to get all record with no parameters to an object, and perform queries (may be with linq) on this object. So database will not be exthausted. Which objects can be used instead of datatable?

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  • problem in deleting record

    - by akshay
    I have a entity manager em1 .em1 starts a transcation tx on db1 table1.Now inside tx i call a API getdata().This API creastes a new entitymanger em2 and return 1 record.Now if entity manger em1 tries to delete the record returned by em1 , it hangs.Code times out.Is the record locked by em1.How can ii solve this problem? create em1 //em1 start transcation tx1 tx1.start Object r = getData(); em1 tried to delete r //code hangs here tx1.commit Object getData(){ create em2 return data found using em2 }

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  • Cannot use ternary operator in LINQ query

    - by Nissan Fan
    I can't figure out why I get a Object reference not set to an instance of an object. error if I use a ternary operator in my LINQ query. var courses = from d in somesource orderby d.SourceName, d.SourceType select new { ID = d.InternalCode, Name = string.Format("{0} - {1}{2}", d.InternalCode, d.SourceName, (d.SourceType.Length > 0 ? ", " + d.SourceType : string.Empty)) }; Any thoughts?

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