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  • How to get equivalent of ResultSetMetaData without ResultSet

    - by javanix
    Hey Guys - I need to resolve a bunch of column names to column indexes (so as to use some of the nice ResultSetMetaData methods). However, the only way that I know how to get a ResultSetMetaData object is by calling getMetaData() on some ResultSet. The problem I have with that is that grabbing a ResultSet takes up uneccesary resources in my mind - I don't really need to query the data in the table, I just want some information about the table. Does anyone know of any way to get a RSMD object without getting a ResultSet (from a potentially huge table) first? Thanks!

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  • how to disable web page cache throughout the servlets

    - by Kurt
    To no-cache web page, in the java controller servlet, I did somthing like this in a method: public ModelAndView home(HttpServletRequest request, HttpServletResponse response) throws Exception { ModelAndView mav = new ModelAndView(ViewConstants.MV_MAIN_HOME); mav.addObject("testing", "Test this string"); mav.addObject(request); response.setHeader("Cache-Control", "no-cache, no-store"); response.setHeader("Pragma", "no-cache"); response.setDateHeader("Expires", 0); return mav; } But this only works for a particular response object. I have many similar methods in a servlet. And I have many servlets too. If I want to disable cache throughout the application, what should I do? (I do not want to add above code for every single response object) Thanks in advance.

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  • Security when using GWT RPC

    - by gerdemb
    I have an POJO in Google Web Toolkit like this that I can retrieve from the server. class Person implements Serializable { String name; Date creationDate; } When the client makes changes, I save it back to the server using the GWT RemoteServiceServlet like this: rpcService.saveObject(myPerson,...) The problem is that the user shouldn't be able to change the creationDate. Since the RPC method is really just a HTTP POST to the server, it would be possible to modify the creationDate by changing the POST request. A simple solution would be to create a series of RPC functions like changeName(String newName), etc., but with a class with many fields would require many methods for each field, and would be inefficient to change many fields at once. I like the simplicity of having a single POJO that I can use on both the server and GWT client, but need a way to do it securely. Any ideas?

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  • Using * in SELECT Query

    - by libregeek
    I am currently porting an application written in MySQL3 and PHP4 to MySQL5 and PHP5. On analysis I found several SQL queries which uses "select * from tablename" even if only one column(field) is processed in PHP. The table has almost 60 columns and it has a primary key. In most cases, the only column used is id which is the primary key. Will there be any performance boost if I use queries in which the column names are explicitly mentioned instead of * ? (In this application there is only one method which we need all the columns and all other methods return only a subset of the columns)

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  • Messy bash variable

    - by Kyle
    I'm writing a script to ssh in to a list of machines and compare a variable to another value.. I've run into a problem (I have a couple workarounds, but at this point I'm just wondering why this method isn't working). VAR=ssh $i "awk -F: '/^bar/ {print \$2}' /local/foo.txt" ($i would be a hostname. The hosts are trusted, no password prompt is given) Example of foo.txt: foo:123456:abcdef bar:789012:ghijkl baz:345678:mnopqr I'm assuming it's a problem with quotes, or \'s needed somewhere. I've tried several methods (different quoting, using $() instead of ``, etc) but can't seem to get it right. My script is working correctly using the following: VAR=ssh $i "grep bar /local/foo.txt" | awk -F: '{print \$2}' Like I said, just a curiousity, any response is appreciated.

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  • WPF calls not working during long method processing

    - by Colin Rouse
    Hi, The following method does not apply the wpf changes (background = red) until the 2nd method (DoWork) exits: private void change() { Background = Brushes.Red; Dispatcher.BeginInvoke((Action) DoWork); } DoWork() takes several seconds to run and I don't really want to put it into a thread, as this code will be used in several places and will probably interact will the Dispatcher thread at various intervals. I've tried calling the Invalidate...() methods, but to no avail. The BeginInvoke() was added to see if the delay would allow the background change to be applied before the logic was called. Typically, the logic would be part of this method. Btw, most of the logic is performed on a different thread and shouldn't block the Dispatcher thread?! Can someone please help? Thanks

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  • Using injected EntityManager in class hierarchies

    - by Emre Sahin
    The following code works: @Stateless @LocalBean public class MyClass { @PersistenceContext(name = "MyPU") EntityManager em; public void myBusinessMethod(MyEntity e) { em.persist(e); } } But the following hierarchy gives a TransactionRequiredException in Glassfish 3.0 (and standard JPA annotations with EclipseLink.) at the line of persist. @Stateless @LocalBean public class MyClass extends MyBaseClass { public void myBusinessMethod(MyEntity e) { super.update(e); } } public abstract class MyBaseClass { @PersistenceContext(name = "MyPU") EntityManager em; public void update(Object e) { em.persist(e); } } For my EJB's I collected common code in an abstract class for cleaner code. (update also saves who did the operation and when, all my entities implement an interface.) This problem is not fatal, I can simply copy update and sister methods to subclasses but I would like to keep all of them together in a single place. I didn't try but this may be because my base class is abstract, but I would like to learn a proper method for such a (IMHO common) use case.

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  • Equivalent of describeType for Flex Component EVENTS

    - by Joshua
    Using "introspection" In Flex I can say: var classInfo:XML=describeType(SomeObject); Which will list for me the Accessors, Methods And Variables. (http://livedocs.adobe.com/flex/3/html/help.html?content=usingas_8.html) But what is the equivalent to programmatically inspect all of an object's possible EVENTS? (NOT JUST the events for which event listeners have been set, but to somehow step through a list of all VALID EVENTS for which event listeners may POTENTIALLY be set -- I realize that such lists are readily available online, and that's great for cases when I know the object's type at design type, but I require some way to inspect any given displayobject programmatically at runtime, and determine what events, if any, are or may be associated with it.)

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  • [PHP] building html tables from query data... faster?

    - by Andrew Heath
    With my limited experience/knowledge I am using the following structure to generate HTML tables on the fly from MySQL queries: $c = 0; $t = count($results); $table = '<table>'; while ($c < $t) { $table .= "<tr><td>$results[0]</td><td>$results[1]</td> (etc etc) </tr>"; ++$c; } $table .= '</table>'; this works, obviously. But for tables with 300+ rows there is a noticeable delay in pageload while the script builds the table. Currently the maximum results list is only about 1,100 rows, and the wait isn't long, but there's clearly a wait. Are there other methods for outputting an HTML table that are faster than my WHILE loop? (PHP only please...)

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  • VS 2008 Profiler - Caller/Callee view showing bottom of stack

    - by Ncc
    Hello, I am currently trying to profile a class contained in a different assembly. To do this I created a small console application which calls into the public entry point of the class I want to profile. This enrty point is called Run(). This is working fine when I run my Console application in Debug mode and I can step into the Run() method. The Run() method calls a variety of other methods in its own assembly and other assemblies. However, when I create a new profiler of type "Instrumentation" in VS 2008, and run the profiler, the report shows my Main() function calling Run(), but in turn, when viewing the Caller/Callee report for my Run() method the report shows that the Run() method is the bottom of the stack. This is clearly not the case - could anyone please suggest why this is happening? Thanks.

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  • MeioUpload and phpThumb() does not exist error

    - by Cameeob2003
    I am currently using CakePHP v2.2.1 and MeioUpload 4.0 along with phpThumb() to try and generate image uploads and thumbnails for those images. If i set my $actAs = array() without the thumbsizes property everything is uploaded well, but when I add the following: 'thumbsizes' => array( 'small' => array('width' => 165, 'height' => 115), 'medium' => array('width' => 800, 'height' => 600) ), to generate thumbnails I get an error stating the following: "E:/xampp/htdocs/site/vendors/phpthumb/img/posts/image-name.jpg" does not exist I have tried several different methods of fixing this from around the web and nothing seems to work. I am new to cakephp so this may be an easy fix and I am just not connecting the dots to find the solution. Any help would be very much appreciated.

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  • How to inject dependencies into a custom UserNamePasswordValidator in WCF?

    - by Dannerbo
    I'm using a UserNamePasswordValidator in WCF along with Unity for my dependency injection, but since WCF creates the instance of the UserNamePasswordValidator, I cannot inject my container into the class. So how would one go about this? The simplest solution I can think of is to create a static proxy/wrapper class around a static instance of a UnityContainer, which exposes all the same methods... This way, any class can access the container, and I don't need to inject it everywhere. So I could just do UnityContainerWrapper.Resolve() anywhere in code. So basically this solution solves 2 problems for me, I can use it in classes that I'm not creating an instance of, and I can use it anywhere without having to inject the container into a bunch of classes. The only downside I can think of is that I'm now potentially exposing my container to a bunch of classes that wouldn't of had access to the container before. Not really sure if this is even a problem though?

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  • SqlCommand.Paramaters.AddWithValue issue

    - by Petrus
    Hi I have a problem with the folowwing piece of code. I am passing a parameter (List) to a methods executing the following code. When it executes sql throws an error saying that the proc expects a parameter that was not provided. I know this error and understand it, and when stepping through the code I can see that the cmdExecuteReader object has a collection of parameters, with the correct naame and value. What cou be the problem? public SqlDataReader ExecuteReader(string storedProcedure, List<SqlParameter> parameters = null) { SqlCommand cmdExecuteReader = new SqlCommand() { CommandType = System.Data.CommandType.Text, Connection = conn, CommandText = storedProcedure }; if (parameters != null) { foreach (SqlParameter param in parameters) { cmdExecuteReader.Parameters.AddWithValue(param.ParameterName, param.Value); } } if (conn.State == System.Data.ConnectionState.Closed) conn.Open(); return cmdExecuteReader.ExecuteReader(); }

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  • How to make @BeforeClass run prior Spring TestContext loads up ?

    - by lisak
    Hey, it should be piece of cake for programmers using testNG. I have this scenario @ContextConfiguration(locations={"customer-form-portlet.xml", "classpath:META-INF2/base-spring.xml" }) public class BaseTestCase extends AbstractTestNGSpringContextTests { ... @BeforeClass public void setUpClass() throws Exception { But I'd need the spring context to be load up after @BeforeClass. I I came up with overriding AbstractTestNGSpringContextTests methods : @BeforeClass(alwaysRun = true) protected void springTestContextBeforeTestClass() throws Exception { this.testContextManager.beforeTestClass(); } @BeforeClass(alwaysRun = true, dependsOnMethods = "springTestContextBeforeTestClass") protected void springTestContextPrepareTestInstance() throws Exception { this.testContextManager.prepareTestInstance(this); } and make my method @BeforeClass(alwaysRun = true, dependsOnMethods = "setUpClass") protected void springTestContextPrepareTestClass() throws Exception { } But then I get : Caused by: org.testng.TestNGException: org.springframework.test.context.testng.AbstractTestNGSpringContextTests.springTestContextPrepareTestInstance() is not allowed to depend on protected void org.springframework.test.context.testng.AbstractTestNGSpringContextTests.springTestContextBeforeTestClass() throws java.lang.Exception Make it public also doesn't help. Could please anybody mention here if it can be done in a working manner :-) I know that I could load the testContext manually, but that wouldn't be so fancy. It works like this, but TestContextManager is not visible so I can't call prepareTestInstance() method on it : @Override @BeforeClass(alwaysRun = true, dependsOnMethods = "setUpClass") public void springTestContextPrepareTestInstance() throws Exception { }

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  • Need a .NET Dictionary<string,object> with just a little more functionality.

    - by Ronnie Overby
    I need a dictionary but I also need to store a boolean value about the object in the dictionary. What's the best way for this. Something like Dictonary<string,object,bool> would be ideal, but doesn't exist. My first idea was: public class SomeObject { public object Value { get; set; } public bool Flag { get; set; } } // and then use: Dictionary<string,SomeObject> myDictionary; My 2nd idea was to implement IDictionary and contain two dictionaries within that were manipulated by the implemented methods and property accessors. My 3rd idea was to see what the folks at StackOverflow would do.

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  • How can I prevent users from taking screenshots of my application window?

    - by Midday
    What are some methods to prevent screenshots from being taken, if any? I've considered setting the "Print Screen" button as a hotkey, which makes the window fuzzy. However, there would be the problem of other 3rd party screenshot tools. How can I prevent their use? Why would I want such a thing? The idea is to create a chat client which you can't share the chatted information with others, not by copy & paste nor by print screen... Looking for general ideas or suggestions rather than actual code.

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  • Separate functionality depending on Role in ASP.NET MVC

    - by Andrew Bullock
    I'm looking for an elegant pattern to solve this problem: I have several user roles in my system, and for many of my controller actions, I need to deal with slightly different data. For example, take /Users/Edit/1 This allows a Moderator to edit a users email address, but Administrators to edit a user's email address and password. I'd like a design for separating the two different bits of action code for the GET and the POST. Solutions I've come up with so far are: Switch inside each method, however this doesn't really help when i want different model arguments on the POST :( Custom controller factory which chooses a UsersController_ForModerators and UsersController_ForAdmins instead of just UsersController from the controller name and current user role Custom action invoker which choose the Edit_ForModerators method in a similar way to above Have an IUsersController and register a different implementation of it in my IoC container as a named instance based on Role Build an implementation of the controller at runtime using Castle DynamicProxy and manipulate the methods to those from role-based implementations Im preferring the named IoC instance route atm as it means all my urls/routing will work seamlessly. Ideas? Suggestions?

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  • PHP or Javascript or other - Draw simple shapes onto images?

    - by Tommo
    I basically have an image of a world map and i would like to place a pin image at a specified pixel co-ordinate ontop of this world map image. It's for a website, so ideally the solution should be in PHP or Javascript (i'm avoiding Java and Flash as i want it to be as simple as possible). I had a look at the processing.js library but it is way to big and bloated for just performing this simple task. Is there a pre-existing Javascript function which will allow me to do this? Or a more simple javascript library that i can use? (processing.js was a bit too advanced for me, i couldnt get it working lol) In terms of a PHP solution, i would prefer taking the load off the server and onto the client for this task, but i would still like to hear methods for doing it in PHP if they are suitable. Thanks!

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  • Screen location of NSToolbarItem

    - by adib
    How can I get the on-screen location of a button in a toolbar? That is getting the rectangle frame of an NSToolbarItem? The [NSToolbarItem view] method seems to always return nil whenever the toolbar item is only a simple action button and thus I couldn't use the normal NSView methods to pinpoint the toolbar button's on-screen position. Background I'm trying to use Matt Gemmell's MAAttachedWindow component to point to a specific toolbar button. The component requires an NSPoint object to "point" the user to a location on the screen. Thanks in advance.

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  • ASP.NET MVC: What's the difference in concept between Service and Repository

    - by Richard77
    Hello, The question I'm asking is kind of subjective. I've seen twice, while exercising with real projects such as StoreFront, both Repository and Services. Sometimes they can just be folders or projects attached to the solution. But they contain classes and interfaces. So, I'd like to know what goes to the repository and what goes to the services. So far, I was familiar with repositories (we put methods and properties in the repository to reduce the complexity in the controller). How about the services? So, ASP.NET MVC: What's the difference in concept between Service and Repository? (Maybe none) My question is Kind of subjective, but I'd like to make sure that I'm not missing anything. Thanks for helping

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  • Mockito verify no more interactions but omit getters

    - by michael lucas
    Mockito api provides method: Mockito.verifyNoMoreInteractions(someMock); but is it possible in Mockito to declare that I don't want more interactions with a given mock with the exceptions of interactions with its getter methods? The simple scenario is the one in which I test that sut changes only certain properties of a given mock and lefts other properties untapped. In example I want to test that UserActivationService changes property Active on an instance of class User but does't do anything to properties like Role, Password, AccountBalance, etc. I'm open to criticism regarding my approach to the problem.

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  • How to implement ASP.NET membership provider in my domain model

    - by Kjensen
    In a website, I need to integrate membership and authentication. So I want to use the functionality of ASP.NET Membership, but I have other custom stuff, that a "user" has to do. So I am sitting here with my pencil and paper, drawing lines for my domain model... And how can I best utilize the ASP.Net membership, but extend it to fill my needs? Should I create a class that inherits from a MembershipUser and extend it with my own properties and methods (and save this in a seperate table). Or should I let the MembershipUser be a property on my custom User/Client object? What would be a good solid way to do this?

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  • ASP.NET MVC UpdateModel - fields vs properties??

    - by mrjoltcola
    I refactored some common properties into a base class and immediately my model updates started failing. UpdateModel() and TryUpdateModel() did not seem to update inherited public properties. I cannot find detailed info on MSDN nor Google as to the rules or semantics of these methods. The docs are terse (http://msdn.microsoft.com/en-us/library/dd470933.aspx), simply stating: Updates the specified model instance using values from the controller's current value provider. SOLVED: MVC.NET does indeed handle inherited properties just fine. This turned out to have nothing to do with inheritance. My base class was implemented with public fields, not properties. Switching them to formal properties (adding {get; set; }) was all I needed. This has bitten me before, I keep wanting to use simple, public fields. I would argue that fields and properties are syntactically identical, and could be argued to be semantically equivalent, for the user of the class.

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  • What are some good books on software testing/quality?

    - by mjh2007
    I'm looking for a good book on software quality. It would be helpful if the book covered: The software development process (requirements, design, coding, testing, maintenance) Testing roles (who performs each step in the process) Testing methods (white box and black box) Testing levels (unit testing, integration testing, etc) Testing process (Agile, waterfall, spiral) Testing tools (simulators, fixtures, and reporting software) Testing of embedded systems The goal here is to find an easy to read book that summarizes the best practices for ensuring software quality in an embedded system. It seems most texts cover the testing of application software where it is simpler to generate automated test cases or run a debugger. A book that provided solutions for improving quality in a system where the tests must be performed manually and therefore minimized would be ideal.

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  • LINQ method chaining and granular error handling

    - by Clafou
    I have a method which can be written pretty neatly through method chaining: return viewer.ServerReport.GetParameters() .Single(p => p.Name == Convention.Ssrs.RegionParamName) .ValidValues .Select(v => v.Value); However I'd like to be able to do some checks at each point as I wish to provide helpful diagnostics information if any of the chained methods returns unexpected results. To achieve this, I need to break up all my chaining and follow each call with an if block. It makes the code a lot less readable. Ideally I'd like to be able to weave in some chained method calls which would allow me to handle unexpected outcomes at each point (e.g. throw a meaningful exception such as new ConventionException("The report contains no parameter") if the first method returns an empty collection). Can anyone suggest a simple way to achieve such a thing?

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