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• Java DAO caching

  - by santiagobasulto

  I'm developing a medium Java app, and i'm facing a small problem due to my lack of experience. I've a custom DAO, which gets "Article" objects from the Database. I've the Article class, and the DAO has a method called getArticle(int id), this method returns an Article. The Article has a Category object, and I'm using lazy loading. So, when I request for an article's category (Article a = new Article(); a.getCategory();) the Article class gets the Category from the DAO and then returns it. I'm now thinking to cache it, so when I request multiple times to an article's category, the database is only queried one time. My question is: where should I put that cache? I can put it on the Article class (in the DTO), or I can put it on the DAO class. What do you say?

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• Definitive list of protocols supported by the WebClient and WebRequest classes.

  - by the-locster

  The docs state: From WebRequest.Create Method The .NET Framework includes support for the http://, https://, and file:// URI schemes. Custom WebRequest descendants to handle other requests are registered with the RegisterPrefix method. However I've also been using this class to get files via ftp (not listed in the docs). Is there a definitive list of supported protocols documented anywhere? UPDATE: To clarify. Yes additional protocols can be plugged-in, but what is the standard/baseline set of protocols supported in the class framework assuming I haven't registered any others. e.g. sftp, tftp?

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• Python:How to override inner class methods if the inner class is defined as a property of the top cl

  - by Maddy

  I have a code snippet like this class A(object): class b: def print_hello(self): print "Hello world" b = property(b) And I want to override the inner class 'b'(please dont worry about the lowercase name) behaviour. Say, I want to add a new method or I want to change an existing method, like: class C(A): class b(A.b): def print_hello(self): print "Inner Class: Hello world" b = property(b) Now if I create C's object as c = C(), and call c.b I get TypeError: 'property' object is not callable error. How would I get pass this and call print_hello of the extended inner class? Disclaimer: I dont want to change the code for A class.

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• UIViewController is popped from view stack and NSURLConnection crashes the application

  - by rickharrison

  I am pushing a UIViewController onto a UINavigationController. This view controller immediately starts a download of an xml feed and then parses it. However, if you hit the back button before it is done downloading, and crashes with EXC_BAD_ACCESS. The line that is crashing it is in parserDidEndDocument and is this line: if (self.delegate && [self.delegate conformsToProtocol:@protocol(ModelDelegate)]) [self.delegate modelDidFinishParsing:self]; I assume it is crashing because it is trying to access self.delegate which is not assigned anymore. How do I get around this? Also, I would release the model object in the modelDidFinishParsing method. How would I release this model if it never reaches this method.

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• how topass value to controller??

  - by rajesh

  hi all, actuallly when i trying to pass url value to controller action, action is not getting the required value... i ma sending the value like this function value(url,id) { alert(url); document.getElementById('rating').innerHTML=id; var params = 'artist='+id; alert(params); // var newurl='http://localhost/songs_full/public/eslresult/ratesong/userid/1/id/27'; var myAjax = new Ajax.Request(newurl,{method: 'post',parameters:params,onComplete: loadResponse}); //var myAjax = new Ajax.Request(url,{method:'POST',parameters:params,onComplete: load}); //alert(myAjax); } function load(http) { alert('success'); } and in controller i hav write like public function ratesongAction() { $user=$_POST['rating']; echo $user; $post= $this->getRequest()->getPost(); //echo $post; $ratesongid= $this->_getParam('id'); but still not getting the result i am using zend framework

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• Log information inside a JUnit Suite

  - by Alex Marinescu

  I'm currently trying to write inside a log file the total number of failed tests from a JUnite Suite. My testsuite is defined as follows: @RunWith(Suite.class) @SuiteClasses({Class1.class, Class2.class etc.}) public class SimpleTestSuite {} I tried to define a rule which would increase the total number of errors when a test fails, but apparently my rule is never called. @Rule public MethodRule logWatchRule = new TestWatchman() { public void failed(Throwable e, FrameworkMethod method) { errors += 1; } public void succeeded(FrameworkMethod method) { } }; Any ideas on what I should to do to achieve this behaviour?

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• Issues using UITapGestureRecognizers in Interface Builder

  - by 5StringRyan

  I'm attempting to use the UITapGestureRecognizer object that can be found in Interface Builder. I've dragged a single "UITapGestureRecognizer" from the object library to a single view xib. I then create an IBAction method from this tap gesture, for a simple test, I'm just printing an "NSLog" message to the console once there is a tap on the view. I've run this, and the tap method isn't being called. I right click the view in IB and I noticed that there is a warning "!" on the view's "Outlook Collections" I see: Outlook Collections gestureRecognizers - Tap Gesture Recognizer (!) The warning states: UIView does not have an outlet collection named gestureRecognizers. What do I need to do to remedy this?

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• explaining $this->load->view()

  - by ajsie

  in a controller you can use this method to load a view. but i want to know behind the scenes here. im new to php and frameworks, but i’ve learned the basics of OOP. when $this-view() is made then the method in the current class or the parent class is used. but what does this mean: $this-load-view(). what is the intermediate load? is it a function or is it a property? where is it located? how could it contain view()? grateful for explanation.

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• How do I render a partial to a string from within a filter attached to a controller

  - by Tristan Havelick

  I have some code I need to use in multiple controllers in a rails 1.0 application (I can't, for strange reasons upgrade to a newer rails). I've extracted the relevant code into a filer object, and I'm using the around_filter construct to execute it. Before the extract, I was using the method render_to_string() to get the contents of a rendered partial into a string. However, this method is protected, so I am unable to access it from within my Filter object. As a workaround, I tried adding this to my ApplicationController: def render_to_string(*a) super(*a) end this seems to have remedied the protection level issue, but now I get the error: Can only render or redirect once per action When no such error occurred before the extraction. Why? Is there a different approach I should take here?

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• what are the best practices to prevent sql injections

  - by s2xi

  Hi, I have done some research and still confused, This is my outcome of that research. Can someone please comment and advise to how I can make these better or if there is a rock solid implementation already out there I can use? Method 1: array_map('trim', $_GET); array_map('stripslashes', $_GET); array_map('mysql_real_escape_string', $_GET); Method 2: function filter($data) { $data = trim(htmlentities(strip_tags($data))); if (get_magic_quotes_gpc()) $data = stripslashes($data); $data = mysql_real_escape_string($data); return $data; } foreach($_GET as $key => $value) { $data[$key] = filter($value); }

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• Looking for a way to get HTTP Digest Authentication headers from incoming http requests

  - by duncancarroll

  I've been working on a REST implementation with my existing Cake install, and it's looking great except that I want to use HTTP Digest Authentication for all requests (Basic Auth won't cut it). So great, I'll generate a header in the client app (which is not cake) and send it to my cake install. Only problem is, I can't find a method for extracting that Digest from the request... I've looked through the Cake API for something that I can use to get the Digest Header. You'd think that Request Handler would be able to grab it, but I can't find anything resembling that. There must be another method of getting the digest that I am overlooking? In the meantime I'm writing my own regex to parse it out of the Request... once I'm done I'll post it here so no one has to waste as much time as I did hunting for it.

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• navigation between screens Iphone programming

  - by Sephy

  Hi, I don't know if my question will be clear or not, but i'm starting basic stuff with iphone programming, and i'm trying to understand how to go from a screen to another. lets say i have a screen with a "next page" button and another page with a "return" button. I have a general idea of how to do this, but I don't know how to put it together. I think I need an IBAction method for each button, and in each method a navigation controller with pushViewController. So far, i've tried the following code, but even if it compiles properly and runs when i push the button, there is no change of screen... -(IBAction) toNext(id)sender{ NSLog(@"before code"); NextViewController *nvc = [[NextViewController alloc] initWithNibName:@"NextView" bundle:nil]; [self.navigationController pushViewController:nvc animated:YES]; [nvc release]; NSLog(@"after code"); } If someone had a nice tuto for me, it could be of some help... thx

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• jms unresolved message-destination-ref

  - by portoalet

  hi, I am using netbeans 6.8, and glassfish v3, and making a simple jms application to work. I got this: com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Unresolved Message-Destination-Ref jms/[email protected]@null into class enterpriseapplication4.Main Code: public class Main { @Resource(name = "jms/myQueue") private static Topic myQueue; @Resource(name = "jms/myFactory") private static ConnectionFactory myFactory; ... // the rest is just boiler plate created by netbeans } In my Glassfish v3 admin console, I have jms/myFactory as my ConnectionFactory and jms/myQueue as my Destination Resources. What am I missing? Full stack: WARNING: enterprise.deployment.backend.invalidDescriptorMappingFailure com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Unresolved Message-Destination-Ref jms/[email protected]@null into class enterpriseapplication4.Main at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:614) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.inject(InjectionManagerImpl.java:384) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectClass(InjectionManagerImpl.java:210) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectClass(InjectionManagerImpl.java:202) at org.glassfish.appclient.client.acc.AppClientContainer$ClientMainClassSetting.getClientMainClass(AppClientContainer.java:599) at org.glassfish.appclient.client.acc.AppClientContainer.getMainMethod(AppClientContainer.java:498) at org.glassfish.appclient.client.acc.AppClientContainer.completePreparation(AppClientContainer.java:397) at org.glassfish.appclient.client.acc.AppClientContainer.prepare(AppClientContainer.java:311) at org.glassfish.appclient.client.AppClientFacade.prepareACC(AppClientFacade.java:264) at org.glassfish.appclient.client.acc.agent.AppClientContainerAgent.premain(AppClientContainerAgent.java:75) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:323) at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:338) Caused by: javax.naming.NamingException: Lookup failed for 'java:comp/env/jms/myQueue' in SerialContext targetHost=localhost,targetPort=3700 [Root exception is javax.naming.NameNotFoundException: No object bound for java:comp/env/jms/myQueue [Root exception is java.lang.NullPointerException]] at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:442) at javax.naming.InitialContext.lookup(InitialContext.java:392) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:513) ... 15 more Caused by: javax.naming.NameNotFoundException: No object bound for java:comp/env/jms/myQueue [Root exception is java.lang.NullPointerException] at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:218) at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:428) ... 17 more Caused by: java.lang.NullPointerException at javax.naming.InitialContext.getURLScheme(InitialContext.java:269) at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:318) at javax.naming.InitialContext.lookup(InitialContext.java:392) at com.sun.enterprise.naming.util.JndiNamingObjectFactory.create(JndiNamingObjectFactory.java:75) at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:688) at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:657) at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:148) ... 18 more Regards

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• Android: setting up a google map class. bit of advice required.

  - by Capsud

  Hey there, Ok so this is what i've got. Button anandabutton = (Button) findViewById(R.id.anandaAddressButton); anandabutton.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { Intent myIntent = new Intent(view.getContext(),MapClass.class); startActivityForResult(myIntent,0); } }); This method opens up my MapClass class which at the moment I just have set to show the location of one place. But I have a load of buttons and rather than making a lot of different mapClass classes for each button, I am wondering can I just use the one class and depending on what button 'id' is pressed, it will check an 'if statement' and then put in the correct coordinates into the method to display the map. It would be a lot neater than coding up like 20-30 classes. I'm not sure if i've explained that right so if not let me know. Thanks for any help.

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• two HashMap iteration

  - by user431276

  I have two HashMaps and I can iterate both hashmaps with following code Iterator it = mp.entrySet().iterator(); while (it.hasNext()) { Map.Entry pairs = (Map.Entry)it.next(); String firstVal = pairs.getValue(); } Iterator it2 = mp2.entrySet().iterator(); while (it2.hasNext()) { Map.Entry pairs2 = (Map.Entry)it.next(); String SecondVal = pairs2.getValue(); } myFunction(firstVal, SecondVal) Is there anyway to iterate two hashmaps at the same time without using two loops? Currently, I have a method that accepts two parameters and each parameter value is stored in first and second hashmap. I have to iterate first hash then second to get values. I think there must be a good way to do it but I don't know :( P.S: there could be some errors in above code as this is just an example to explain my problem. Each iterator is a method in original program and accept one parameter. I couldn't copy past real time functions as they are HUGE !

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• jQuery variables and scope

  - by Peuge

  I am writing a jQuery plugin and am running into a few problems with regard to variables. For example I have the following skeleton structure for my plugin, which is going to act on a textbox. In my init function I want to set a variable and bind a keypress event to my textbox. That keypress event needs to call another function, in which I need the variable. Is this possible? (function($){ var methods = { init : function(options){ return this.each(function(){ var $this = $(this); var someVar = 'somevar'; $this.keypress(function(event){ //I want to call my customFunction }); }); }, customFunction : function(){ //I am wanting to access 'someVar' here }; $.fn.mynamespace = function(method){ //handle which method to call here }; })(jQuery); Many thanks in advance.

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• Get the image file path

  - by Googler

  HI, I am trying to retrive the filname of the image file from a file path in my code. My filepath: c:\mydocuments\pictures\image.jpg which method can i use in c# to get he filename of the above mentioned path. Like String file = image.jpg I have used the system.drawing to get he path, but it returns null. my code: string file = System.drawing.image.fromfile(filepath,true); Is this the right way to get the image file name or is there any other inbuilt method in c#. Pls help me on this?

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• What's the proper way to use sqlite at xCode?

  - by Elliot Chen

  Hi, Experts: Can you please give some suggestions on sqlite using at xcode? Within my application, I use a sqlite DB to store all local data. Two methods can be used to retrieve those data during running time. 1, Load all the data into memory at initialization stage. (More memory used, less DB open/close operation needed) 2, Read corresponding records when necessary, free the occupied memory after using. (Good habit for memory using, but much DB open/close operations needs). I prefer to use method 2, but not sure whether too many DB opening/closing operations could affect app's efficiency. Or do you think I can 'upgrade' method 2 by opening DB when app launches and closing DB when app quits? Thanks for your suggestions very much!

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• Android 1.6: onActivityResult is not called

  - by Seb

  Hi, I have a problem with the method "onActivityResult". I create a new Activity from my main activity: Intent intent = new Intent(this, NewActivity.class); startActivityForResult(intent, 0); The new Activity is ended like this: Intent resultIntent = new Intent(); resultIntent.putExtra("vid", hmvenues.get(venues[currentPosition])); resultIntent.putExtra("name", venues[currentPosition]); setResult(RESULT_OK, resultIntent); finish(); But the Method onActivityResult seem to be not called @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { Log.d(this.getClass().getName(),"onActivityResult"); ... } Does anyone have an idea, what I did wrong? Thanks!! Seb

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• Form Security (discussion)

  - by Eray Alakese

  I'm asking for brain storming and sharing experience. Which method you are using for form submiting security ? For example , for block automatically sended POST or GET datas, i'm using this method : // Generating random string <?php $hidden = substr(md5(microtime()) ,"-5"); ?> <form action="post.php" .... // assing this random string to a hidden input <input type="hidden" value="<?php echo $hidden;" name="secCode> // and then put this random string to a session variable $_SESSION["secCode"] = $hidden; **post.php** if ($_POST["secCode"] != $_SESSION["secCode"]) { die("You have to send this form, on our web site"); }

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• Progress dialog getting dismissed before the thread gets finished - Android

  - by user264953

  Hi experts, I use the code provided by Fedor in the following link, in order to get the latitude and longitude from my simple demo app. I am trying to fetch the latitude and longitude using the MyLocation class provided by him in that link. What is the simplest and most robust way to get the user's current location in Android? I try to fetch the latitude and longitude on a button click. On the button click, I start an async task and delegate the location fetching work to the do in background method of my asynctask. pre execute - progressdialog initiated. post execute - progress dialog dismissed. This is how, the progress dialog in my code should work and here is the issue which I have. THe progress dialog gets initiated correctly, but even before the latitude and longitude gets printed in the doinbackground method, the progress dialog gets dismissed. I do not understand why this happens. Here is my front end activity public class LocationServices extends Activity { MyLocation myLocation = new MyLocation(); LocationResult locationResult; TextView tv1, tv2; Location location; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv1 = (TextView) findViewById(R.id.tv1); tv2 = (TextView) findViewById(R.id.tv2); Button btn = (Button) findViewById(R.id.Button01); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { new LocationAsyncTasking().execute(); } }); } public class LocationAsyncTasking extends AsyncTask<String, Void, Void> { ProgressDialog dialog; int totalAvail; protected void onPreExecute() { // this.dialog.setMessage("Inserting data..."); dialog = new ProgressDialog(LocationServices.this); this.dialog.setMessage("Fetching data..."); this.dialog.show(); } protected Void doInBackground(String... args) { Looper.prepare(); locationResult = new LocationResult() { public void gotLocation(Location location) { // TODO Auto-generated method stub // LocationServices.this.location = location; System.out.println("Progress dialog should be present now - latitude"+location.getLatitude()); System.out.println("Progress dialog should be present now - longitude"+location.getLongitude()); } }; myLocation.getLocation(LocationServices.this, locationResult); return (null); } protected void onProgressUpdate(Integer... progress) { } protected void onPostExecute(Void unused) { dialog.dismiss(); } } } I am quite puzzled, thinking of what makes this progress dialog disappear even before the SOP in doinbackground is finished. Experts, please help me understand and resolve this issue. Any help in this regard is well appreciated. Looking forward, Best Regards, Rony

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• Passing data between Castle Windsor's Interceptors

  - by Nhím H? Báo

  I'm adopting Castle Windsor for my WCF project and feel really amazed about this. However, I'm having a scenario that I don't really know if Castle Windsor supports. For example I have the following chained Interceptors Interceptor 1 > Interceptor 2 > Interceptor 3 > Interceptor 4 > Real method Interceptor 1 returns some data and I want that to be available in Interceptor 2 Interceptor 2 in turn does it work and returns the data that I want to make avaialbe in the 3,4, interceptor. The real case scenario is that we're having a WCF service, Interceptor 1 will parse the request header into a Header object(username, password, etc.). The latter interceptors and real method will ultilize this Header object. I know that I can use Session variable to transport data, but is it a built-in, more elegant, more reliable way to handle this?

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• Why does a delegate with no parameters compile?

  - by Ryan

  I'm confused why this compiles: private delegate int MyDelegate(int p1, int p2); private void testDelegate() { MyDelegate imp = delegate { return 1; }; } MyDelegate should be a pointer to a method that takes two int parameters and returns another int, right? Why am I allowed to assign a method that takes no parameters? Interestingly, these doesn't compile (it complains about the signature mismatches, as I'd expect) private void testDelegate() { // Missing param MyDelegate imp = delegate(int p1) { return 1; }; // Wrong return type MyDelegate imp2 = delegate(int p1, int p2) { return "String"; }; } Thanks for any help! Ryan

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• Converting ObjC Blocks to C# Lambas

  - by Sam

  I need some help converting an Objective-C block to C#. Here is the source ObjC: NSDate* addYear = [_calendar dateByAddingComponents:((^{ NSDateComponents* components = [NSDateComponents new]; components.month = 12; return components; })()) toDate:now options:0]; Now I tried the following in C#: NSDate date = _calendar.DateByAddingComponents((() => { NSDateComponents components = new NSDateComponents(); components.Month = 12; return components; })(), now, NSCalendarOptions.None); To which I get the following compiler error: Expression denotes a 'anonymous method' where a 'method group' was expected. Removing the parentheses around the lambda yields Cannot convert 'lambda expression' to non-delegate type 'MonoTouch.Foundation.NSDateComponents'. What is the correct C# syntax? I need to retain the closures as there are a lot more in the code base that I am porting.

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• More than one profile in Django?

  - by JPC

  Is it possible to use Django's user authentication features with more than one profile? Currently I have a settings.py file that has this in it: AUTH_PROFILE_MODULE = 'auth.UserProfileA' and a models.py file that has this in it: from django.db import models from django.contrib.auth.models import User class UserProfileA(models.Model): company = models.CharField(max_length=30) user = models.ForeignKey(User, unique=True) that way, if a user logs in, I can easily get the profile because the User has a get_profile() method. However, I would like to add UserProfileB. From looking around a bit, it seems that the starting point is to create a superclass to use as the AUTH_PROFILE_MODULE and have both UserProfileA and UserProfileB inherit from that superclass. The problem is, I don't think the get_profile() method returns the correct profile. It would return an instance of the superclass. I come from a java background (polymorphism) so I'm not sure exactly what I should be doing. Thanks!

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