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Search found 424 results on 17 pages for 'harry johnston'.

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  • Java EE 6: JSF vs Servlet + JSP. Should I bother learning JSF?

    - by Harry Pham
    I am trying to get familiar with Java EE 6 by reading http://java.sun.com/javaee/6/docs/tutorial/doc/gexaf.html. I am a bit confused about the use of JSF. Usually, the way I develop my Web App would be, Servlet would act like a controller and JSP would act like a View in an MVC model. So Does JSF try to replace this structure? Below are the quote from the above tutorial: Servlet are best suited for service-oriented App and control function of presentation-oriented App like dispatching request JSF and Facelet are more appropriated for generating mark-up like XHTML, and generally used for presentation-oriented App Not sure if I understand the above quote too well, they did not explain too well what is service-oriented vs presentation-oriented. A JavaServer Faces application can map HTTP requests to component-specific event handling and manage components as stateful objects on the server. Any knowledgeable Java developer out there can give me a quick overview about JSF, JSP and Servlet? Do I integrate them all, or do I use them separated base on the App? if so then what kind of app use JSF in contrast with Servlet and JSP A JavaServer Faces application can map HTTP requests to component-specific event handling and manage components as stateful objects on the server. Sound like what servlet can do, but not sure about manage components as stateful objects on the server. Not even sure what that mean? Thanks in advance.

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  • Removing last part of string divided by a colon

    - by Harry Beasant
    I have a string that looks a little like this, world:region:bash It divides folder names, so i can create a path for FTP functions. However, i need at some points to be able to remove the last part of the string, so, for example I have this world:region:bash I need to get this world:region The script wont be able to know what the folder names are, so some how it needs to be able to remove the string after the last colon.

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  • How to change password hashing algorithm when using spring security?

    - by harry
    I'm working on a legacy Spring MVC based web Application which is using a - by current standards - inappropriate hashing algorithm. Now I want to gradually migrate all hashes to bcrypt. My high level strategy is: New hashes are generated with bcrypt by default When a user successfully logs in and has still a legacy hash, the app replaces the old hash with a new bcrypt hash. What is the most idiomatic way of implementing this strategy with Spring Security? Should I use a custom Filter or my on AccessDecisionManager or …?

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  • How to model in J2EE / JEE?

    - by Harry
    Let's say, I have decided to go with J(2)EE stack for my enterprise application. Now, for domain modelling (or: for designing the M of MVC), which APIs can I safely assume and use, and which I should stay away from... say, via a layer of abstraction? For example, Should I go ahead and litter my Model with calls to Hibernate/JPA API? Or, should I build an abstraction... a persistence layer of my own to avoid hard-coding against these two specific persistence APIs? Why I ask this: Few years ago, there was this Kodo API which got superseded by Hibernate. If one had designed a persistence layer and coded the rest of the model against this layer (instead of littering the Model with calls to specific vendor API), it would have allowed one to (relatively) easily switch from Kodo to Hibernate to xyz. Is it recommended to make aggressive use of the *QL provided by your persistence vendor in your domain model? I'm not aware of any real-world issues (like performance, scalability, portability, etc) arising out of a heavy use of an HQL-like language. Why I ask this: I would like to avoid, as much as possible, writing custom code when the same could be accomplished via query language that is more portable than SQL. Sorry, but I'm a complete newbie to this area. Where could I find more info on this topic? Many thanks in advance. /HS

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  • bash: How to evaluate PS1, PS2, ...?

    - by Harry
    Is there any way to 'evaluate' PS1, PS2, etc from within a bash script? Although, I can use alternate means to get all elements of my current PS1, I would really like to be able to reuse its definition instead of using these alternate means. For example, ===================================== PS1 element --> Alternate means ===================================== \u --> $USER \h --> $HOSTNAME \w --> $PWD ... ===================================== I could very well use the 'alternate means' column in my script, but I don't want to. In my PS1, I, for example, use bold blue color via terminal escape sequences which I'd like to be able to simply reuse by evaluating PS1.

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  • How to have a user control as a ListBoxItem

    - by Harry
    I want to bind a user control (View) to a ListBoxItem. The ListBox is bound to a collection of ViewModels. I have set the ListBox's ItemTemplate as so: <ListBox.ItemTemplate> <DataTemplate> <View:ContactView/> </DataTemplate> </ListBox.ItemTemplate> But all I get are blank ListBoxItems. I can click on them, but nothing is showing visually. My ContactView code is very simply: <Border> <DockPanel> <StackPanel DockPanel.Dock="Right" Orientation="Vertical"> <TextBlock Text="{Binding Path=ContactFirstName, FallbackValue=FirstName}" FontWeight="Bold" Margin="5, 0, 5, 0"></TextBlock> <TextBlock Text="{Binding Path=ContactLastName, FallbackValue=LastName}" FontWeight="Bold" Margin="5, 0, 5, 0"></TextBlock> <TextBlock Text="{Binding Path=ContactNumber, FallbackValue=Number}" Margin="5, 0, 5, 0"></TextBlock> </StackPanel> </DockPanel> </Border> What could be wrong with this? Thanks.

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  • JPA + EJB + JSF: how can design complicated query

    - by Harry Pham
    I am using netbean 6.8 btw. Let say that I have 4 different tables: Company, Facility, Project, and Document. So the relationship is this. A company can have multiple facilities. A facility can have multiple projects, and a project can have multiple documents. Company: +companyNum: PK +facilityNum: FK Facility: +facilityNum: PK +projectNum: FK Project: +projectNum: PK +drawingNum: FK So when I create Entity Class From Database in netbean 6.8, I have 4 entity classes that named after the above 4 tables. So if I want to see all the Document in the database, then it is easy. In my SessionBean, I would do this: @PersistenceContext private EntityManager em; List<Document> documents = em.createNamedQuery("Document.findAll").getResultList(); However, that is not all what I need. Let say that I want to know all the Document from a particular Company, or all the Document from a particular Project from a particular Facility from a particular Company. I am very new to JPA + EJB + JSF as a whole. Please help me out.

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  • How often should a programmer communicate with management?

    - by George Johnston
    I struggle with finding a good medium on communication. In our jobs, it seems like it's very easy to get lost in code and lose track of time. It also seems kind of ridiculous to send out updates for every tiny task. Even though I am working very hard on getting things done, in a company that has very active communication between other branches, it tends to look bad for me when I'm not constantly updating my status. However, if I'm working on a 3-4 hour project, I'm not going to update management for every single line of code that I output. Broad I know, depends on the people, company, etc, but what would be a good general rule of thumb for effective communication?

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  • SQL: HAVING clause

    - by Craig Johnston
    See the following SQL statement: SELECT datediff("d", MAX(invoice.date), Now) As Date_Diff, MAX(invoice.date) AS max_invoice_date, customer.number AS customer_number FROM invoice INNER JOIN customer ON invoice.customer_number = customer.number GROUP BY customer.number If the the following was added: HAVING datediff("d", MAX(invoice.date), Now) > 365 would this simply exclude rows with Date_Diff <= 365? What should be the effect of the HAVING clause here?

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  • C#: how to construct strings

    - by Craig Johnston
    Which of these will achieve the correct result: (1) int X = 23; string str = "HELLO" + X.ToString() + "WORLD"; (2) int X = 23; string str = "HELLO" + X + "WORLD"; (3) int X = 23; string str = "HELLO" + (string)X + "WORLD"; EDIT: The 'correct' result is to output: HELLO23WORLD

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  • Is it possible to produce a small preview or thumbnail image of a Crystal report in code?

    - by Lawrence Johnston
    I'm using Crystal to display the reports in my project, and I'd like to be able to display a small preview or thumbnail image of the report to the user when he or she is picking a report to display from my UI. Is there any way to produce these thumbnails dynamically from code? The user has the option to add or remove reports by adding or removing them from the reports folder, so just making all the thumbnail images by hand isn't really an option.

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  • c#: can you use a boolean predicate as the parameter to an if statement?

    - by Craig Johnston
    In C#, can you use a boolean predicate on its own as the parameter for an if statement? eg: string str = "HELLO"; if (str.Equals("HELLO")) { Console.WriteLine("HELLO"); } Will this code output "HELLO", or does it need to be: string str = "HELLO"; if (str.Equals("HELLO") == true) { Console.WriteLine("HELLO"); } If there is anything else wrong with the above code segments, please point it out.

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  • Overloading methods in C#

    - by Craig Johnston
    Is there a way to simplify the process of adding an overloaded method in C# using VS2005? In VB6, I would have just added an Optional parameter the function, but in C# do I have to have to type out a whole new method with this new parameter?

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  • Can't update rows in my database using Entity Framework...?

    - by Dissonant
    Okay, this is really weird. I made a simple database with a single table, Customer, which has a single column, Name. From the database I auto-generated an ADO.NET Entity Data Model, and I'm trying to add a new Customer to it like so: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Test { class Program { static void Main() { Database1Entities db = new Database1Entities(); Customer c = new Customer(); c.Name = "Harry"; db.AddToCustomer(c); db.SaveChanges(); } } } But it doesn't persist Customer "Harry" to the database! I've been scratching my head for a while now wondering why such a simple operation doesn't work. What on earth could be the problem!?

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  • Externally disabling signals for a Linux program.

    - by Harry
    Hello, On Linux, is it possible to somehow disable signaling for programs externally... that is, without modifying their source code? Context: I'm calling a C (and also a Java) program from within a bash script on Linux. I don't want any interruptions for my bash script, and for the other programs that the script launches (as foreground processes). While I can use a... trap '' INT ... in my bash script to disable the Ctrl C signal, this works only when the program control happens to be in the bash code. That is, if I press Ctrl C while the C program is running, the C program gets interrupted and it exits! This C program is doing some critical operation because of which I don't want it be interrupted. I don't have access to the source code of this C program, so signal handling inside the C program is out of question. #!/bin/bash trap 'echo You pressed Ctrl C' INT # A C program to emulate a real-world, long-running program, # which I don't want to be interrupted, and for which I # don't have the source code! # # File: y.c # To build: gcc -o y y.c # # #include <stdio.h> # int main(int argc, char *argv[]) { # printf("Performing a critical operation...\n"); # for(;;); // Do nothing forever. # printf("Performing a critical operation... done.\n"); # } ./y Regards, /HS

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  • SQL Database dilemma : Optimize for Querying or Writing?

    - by Harry
    I'm working on a personal project (Search engine) and have a bit of a dilemma. At the moment it is optimized for writing data to the search index and significantly slow for search queries. The DTA (Database Engine Tuning Adviser) recommends adding a couple of Indexed views inorder to speed up search queries. But this is to the detriment of writing new data to the DB. It seems I can't have one without the other! This is obviously not a new problem. What is a good strategy for this issue?

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  • Django Custom Admin

    - by Harry
    Hello there Currently I have an app with a save method in its models.py . So I would like to change this so the models does not do the save() method, but rather have a separate view that will do this in die admin site. Can you please direct me in the correct direction? Thank you

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  • Close all HTML unclosed IMG tags

    - by George Johnston
    Is it possible to do a regex replace on all IMG tags that are unclosed? If so, how would I identify: <img src="..." alt="..."> ...as a potential canidate to be replaced? = <img src="..." alt="..."/> Update: We have hundreds of pages, and thousands of image tags, all must of which must be closed. I'm not stuck on RegEx -- any other method, aside from manually updating all IMG tags, would suffice.

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  • How to allow utf-8 charset in preg_match ???

    - by Shri.harry
    Hello everone, I am using preg_match() function only to allow specific charachters to accept. It is allowing all alphabates and numbers but along with that i also want to allow utf-8 characters such as "ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ" so how can i allow this charachters from preg_match() function.Plase suggest me. Thanks in advance. Regards Shri

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