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• Domain-driven design with Zend

  - by mik

  This question is a continuation of my previous question here http://stackoverflow.com/questions/2122850/zend-models-architecture (big thanks to Bill Karwin). I've made some reading including this article http://weierophinney.net/matthew/archives/202-Model-Infrastructure.html and this question http://stackoverflow.com/questions/373054/how-to-properly-create-domain-using-zend-framework Now I understand, what domain driven design is. But examples are still very simple and poor. They are based on one table and one model. Now, my question is: do they use Domain Model Design in real-world PHP projects? I've been looking for some good documentation about this, but I haven't found anything good enough, that explains how to manage several tables and transfer them to Domain Objects. As long as I know, there is Hibernate library, that has this features in Java, but what should I use in PHP (Zend Framework)?

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• How do you add a row to a databound datagridview using the datagridview in the gui?

  - by IsaacB

  Hi guys, I've bound a datagridview to a collection of objects. It's giving me a null reference exception when I try to add a new row to a collection (empty or otherwise) using the gui. More specifically, when there is a write event it does this. How can I override the behavior of the write event and manually add all of the columns contents to the object collection? I could disable the add new row feature and make an add button, but the built in datagridview row add looks so much more slick.

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• GWT removeHandler on first event notification

  - by Keith

  I want to remove a GWT event handler the first time I receive an event. I also want to avoid polluting my class with tracking registration objects that aren't really necessary. I currently have it coded as: final HandlerRegistration[] registrationRef = new HandlerRegistration[1]; registrationRef[0] = dialog.addFooHandler(new FooHandler() { public void onFoo(FooEvent event) { HandlerRegistration removeMe = registrationRef[0]; if(removeMe != null) { removeMe.removeHandler(); } // do stuff here } }); but the use of registrationRef makes the code less readable. Is there a better way to do this without adding variables to my class?

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• json encodes aray

  - by Stan Forrest

  Okay I have been struggling with this for hours. What I am doing is creating array of what I call objects that can be moved around on a calendar. Below is my code $year = date('Y'); $month = date('m'); echo json_encode(array( array( 'id' => 111, 'title' => "Event3", 'start' => "$year-$month-10", 'url' => "http://domain.com/" ), array( 'id' => 222, 'title' => "Event2", 'start' => "$year-$month-20", 'end' => "$year-$month-22", 'url' => "http://domain.com/" ) )); Now here is my problem. I need to loop through a mysql database to retrieve the information for each object. For some reason I can't get this to work. Please help Thanks Stan

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• Generate all project dependencies in a single file using gcc -MM flag

  - by Jabez

  Hi all, I want to generate a single dependency file which consists of all the dependencies of source files using gcc -M flags through Makefile. I googled for this solution but, all the solutions mentioned are for generating multiple deps files for multiple objects. DEPS = make.dep $(OBJS): $(SOURCES) @$(CC) -MM $(SOURCEs) > $(DEPS) @mv -f $(DEPS) $(DEPS).tmp @sed -e 's|.$@:|$@:|' < $(DEPS).tmp > $(DEPS) @sed -e 's/.*://' -e 's/\\$$//' < $(DEPS).tmp | fmt -1 | \ sed -e 's/^ *//' -e 's/$$/:/' >> $(DEPS) @rm -f $(DEPS).tmp But it is not working properly. Please tell me where i'm making the mistake.

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• How do i enable innodb on ubuntu server 10.04

  - by Matt

  Here is my entire my.cnf [client] port = 3306 socket = /var/run/mysqld/mysqld.sock # Here is entries for some specific programs # The following values assume you have at least 32M ram # This was formally known as [safe_mysqld]. Both versions are currently parsed. [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] key_buffer = 224M sort_buffer_size = 4M read_buffer_size = 4M read_rnd_buffer_size = 4M myisam_sort_buffer_size = 12M query_cache_size = 44M # # * Basic Settings # # # * IMPORTANT # If you make changes to these settings and your system uses apparmor, you may # also need to also adjust /etc/apparmor.d/usr.sbin.mysqld. # user = mysql socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp skip-external-locking # # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. bind-address = 127.0.0.1 # # * Fine Tuning # #key_buffer = 16M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 # This replaces the startup script and checks MyISAM tables if needed # the first time they are touched myisam-recover = BACKUP #max_connections = 100 #table_cache = 64 #thread_concurrency = 10 # # * Query Cache Configuration # query_cache_limit = 1M #query_cache_size = 16M # # * Logging and Replication # # Both location gets rotated by the cronjob. # Be aware that this log type is a performance killer. # As of 5.1 you can enable the log at runtime! #general_log_file = /var/log/mysql/mysql.log #general_log = 1 log_error = /var/log/mysql/error.log # Here you can see queries with especially long duration #log_slow_queries = /var/log/mysql/mysql-slow.log #long_query_time = 2 #log-queries-not-using-indexes # # The following can be used as easy to replay backup logs or for replication. # note: if you are setting up a replication slave, see README.Debian about # other settings you may need to change. #server-id = 1 #log_bin = /var/log/mysql/mysql-bin.log expire_logs_days = 10 max_binlog_size = 100M #binlog_do_db = include_database_name #binlog_ignore_db = include_database_name # # * InnoDB # # InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/. # Read the manual for more InnoDB related options. There are many! # # * Security Features # # Read the manual, too, if you want chroot! # chroot = /var/lib/mysql/ # # For generating SSL certificates I recommend the OpenSSL GUI "tinyca". # # ssl-ca=/etc/mysql/cacert.pem # ssl-cert=/etc/mysql/server-cert.pem # ssl-key=/etc/mysql/server-key.pem [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] #no-auto-rehash # faster start of mysql but no tab completition [isamchk] key_buffer = 16M # # * IMPORTANT: Additional settings that can override those from this file! # The files must end with '.cnf', otherwise they'll be ignored. # !includedir /etc/mysql/conf.d/ And here is my show engines call....i have no idea what i need to do to enable innodb show engines; +------------+---------+----------------------------------------------------------------+--------------+------+------------+ | Engine | Support | Comment | Transactions | XA | Savepoints | +------------+---------+----------------------------------------------------------------+--------------+------+------------+ | MyISAM | DEFAULT | Default engine as of MySQL 3.23 with great performance | NO | NO | NO | | MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO | | BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO | | CSV | YES | CSV storage engine | NO | NO | NO | | MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO | | FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL | | ARCHIVE | YES | Archive storage engine | NO | NO | NO | +------------+---------+----------------------------------------------------------------+--------------+------+------------+ 7 rows in set (0.00 sec)

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• Spring MVC 3.0: Avoiding explicit JAXBElement<> wrapper in method arg

  - by Keith Myers

  I have the following method and want to avoid having to explicitly show the JAXBElement< syntax. Is there some sort of annotation that would allow the method to appear to accept raw MessageResponse objects but in actuality work the same as shown below? I'm not sure how clear that was so I'll say this: I'm looking for some syntactic sugar :) @ServiceActivator public void handleMessageResponse(JAXBElement<MessageResponse> jaxbResponse) { MessageResponse response = jaxbResponse.getValue(); MessageStatus status = messageStatusDao.getByStoreIdAndMessageId(response.getStoreId(), response.getMessageId()); status.setStatusTimestamp(response.getDate()); status.setStatus("Complete"); }

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• C#: Hook up all events from object in single statement.

  - by David

  In my domain layer all domain objects emit events (of type InvalidDomainObjectEventHandler) to indicate invalid state when the IsValid property is called. On an aspx codebehind, I have to manually wire up the events for the domain object like this: _purchaseOrder.AmountIsNull += new DomainObject.InvalidDomainObjectEventHandler(HandleDomainObjectEvent); _purchaseOrder.NoReason += new DomainObject.InvalidDomainObjectEventHandler(HandleDomainObjectEvent); _purchaseOrder.NoSupplier += new DomainObject.InvalidDomainObjectEventHandler(HandleDomainObjectEvent); _purchaseOrder.BothNewAndExistingSupplier += new DomainObject.InvalidDomainObjectEventHandler(HandleDomainObjectEvent); Note that the same method is called in each case since the InvalidDomainobjectEventArgs class contains the message to display. Is there any way I can write a single statement to wire up all events of type InvalidDomainObjectEventHandler in one go? Thanks David

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• Why use SyncLocks in .NET for simple operations when Interlocked class is available?

  - by rwmnau

  I've been doing simple multi-threading in VB.NET for a while, and have just gotten into my first large multi-threaded project. I've always done everything using the Synclock statement because I didn't think there was a better way. I just learned about the Interlocked Class - it makes it look as though all this: Private SomeInt as Integer Private SomeInt_LockObject as New Object Public Sub IntrementSomeInt Synclock SomeInt_LockObject SomeInt += 1 End Synclock End Sub Can be replaced with a single statement: Interlocked.Increment(SomeInt) This handles all the locking internally and modifies the number. This would be much simpler than writing my own locks for simple operations (longer-running or more complicated operations obviously still need their own locking). Is there a reason why I'd rolling my own locking, using dedicated locking objects, when I can accomplish the same thing using the Interlocked methods?

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• What's the simplest way to create a Zend_Form tabular display with each row having a radio button?

  - by RenderIn

  I've seen simple examples of rendering a Zend_Form using decorators, but I'm not sure they are able to handle the issue I'm facing very well. I query the database and get an array of user objects. I want to display these users as a form, with a radio button next to each of them and a submit button at the bottom of the page. Here's roughly what the form will look like: [user id] [email] [full name] ( ) 1 [email protected] Test user 1 (*) 2 [email protected] Test user 2 [SUBMIT] Is this something achievable in a reasonably straightforward way or do I need to use the ViewScript partial?

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• OO design for business logic

  - by hotyi

  I have one Sell Operation object and two Buy Operation objects, i want to implement such behavior that one Sell Operation discharges two Buy Operation, it looks like: sellOperation.Discharge(oneBuyOperation); sellOperation.Discharge(twoBuyOperation); so i want to ask whether i should call the repository function in the Discharge method, or i'd better call the repository save method outside Discharge method. like: opRepository.Save(sellOpertion); So anyone could give me some advise what are you going to implement in this scenario? using Service class or anything better way?

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• Exactly clone an object in javascript

  - by Tom

  Hi, I tried to exactly clone an object in javascript. I know the following solution using jquery: var newObject = jQuery.extend({}, oldObject); // Or var newObject = jQuery.extend(true, {}, oldObject); but the problem with that is, that the objects type gets lost: var MyClass = function(param1, param2) { alert(param1.a + param2.a); }; var myObj = new MyClass({a: 1},{a: 2}); var myObjClone = jQuery.extend(true, {}, myObj); alert(myObj instanceof MyClass); // => true alert(myObjClone instanceof MyClass); // => false Is there any solution to get true on the second alert?

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• django generic view not recieving an object (template issue?)

  - by Kirby

  My Model class Player(models.Model): player_name = models.CharField(max_length=50) player_email = models.CharField(max_length=50) def __unicode__(self): return self.player_name My Root urls.py urlpatterns = patterns('', (r'^kroster/', include('djangosite.kroster.urls')), (r'^admin/(.*)', admin.site.root), ) My kroster urls.py from djangosite.kroster.models import Player info_dict = { 'queryset': Player.objects.all(), } urlpatterns = patterns('', (r'^$', 'django.views.generic.list_detail.object_list', info_dict), (r'^(?P<object_id>\d+)/$', 'django.views.generic.list_detail.object_detail', info_dict), ) My player_list.html template <h1>Player List</h1> {% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %} <ul> {% for player in object.player_set.all %} <li id="{{ player.id }}">{{ forloop.counter }} .)&nbsp;&nbsp;{{ player }}</li> {% endfor %} </ul> Sadly my template output is this. <h1>Player List</h1> <ul> </ul> Apologies if this is a stupid mistake. It has to be something wrong w/ my template.

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• MVC actionlink posting List of complex type

  - by Ying

  I have an actionlink that on click im passing a List of objects to a controller action. Example: View: Html.ActionLink("TestLink", "TestMethod", "Test", Model.SampleList, null) TestController: public ActionResult TestMethod(List sampleList) { return View(sampleList); } When I do this I get a null sampleList. I can pass a single complex object fine just not a collection of it. Do I need the correct routing for this? The reason I'm doing this is instead of passing an id and do a look up in the controller action, I just pass in the data.

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• C#: Farm out jobs to worker processes on a multi-processor machine

  - by Andrew White

  Hi there, I have a generic check that needs to be run on ca. 1000 objects. The check takes about 3 seconds. We have a server with 4 processors (and we also have other multi-processor servers in our network) so we would like to create an exe / dll to do the checking and return the results to the "master". Does anyone know of a framework for this, or how would one go about it in C#? Specifically: * What's the best way to transfer data between the master and the worker process? * How would the master ensure that always 4 processes are running at any one time and as soon as a worker process is finished start a new one. * How to register that the worker is finished and append it's results to a list? Hope it's clear enough but happy to clarify. A.

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• Django: Admin with multiple sites & languages

  - by lazerscience

  Hi everybody! I'm supposed to build some Django apps, that allow you to administer multiple sites through one backend. The contrib.sites framework is quite perfect for my purposes. I can run multiple instances of manage.py with different settings for each site; but how should django's admin deal with different settings for different sites, eg. if they have different sets of languages, a different (default) language? So there are some problem s to face if you have to work on objects coming from different sites in one admin... I think settings.ADMIN_FOR is supposed to be quite helpful for cases like this, but theres hardly any documentation about it and I think it's not really used in the actual Django version (?). So any ideas/solutions are welcome and much appreciated! Thanks a lot...

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• Python and Plone help

  - by Grenko

  Im using the plone cms and am having trouble with a python script. I get a name error "the global name 'open' is not defined". When i put the code in a seperate python script it works fine and the information is being passed to the python script becuase i can print the query. Code is below: #Import a standard function, and get the HTML request and response objects. from Products.PythonScripts.standard import html_quote request = container.REQUEST RESPONSE = request.RESPONSE # Insert data that was passed from the form query=request.query #print query f = open("blast_query.txt","w") for i in query: f.write(i) return printed I also have a second question, can i tell python to open a file in in a certain directory for example, If the script is in a certain loaction i.e. home folder, but i want the script to open a file at home/some_directory/some_directory can it be done?

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• How to create a backup from SqlAlchemy?

  - by swilliams

  I'm writing a Pylons app, and am trying to create a simple backup system where every table is serialized and tarred up into a single file for an administrator to download, and use to restore the app should something bad happen. I can serialize my table data just fine using the SqlAlchemy serializer, and I can deserialize it fine as well, but I can't figure out how to commit those changes back to the database. In order to serialize my data I am doing this: from myproject.model.meta import Session from sqlalchemy.ext.serializer import loads, dumps q = Session.query(MyTable) serialized_data = dumps(q.all()) In order to test things out, I go ahead and truncation MyTable, and then attempt to restore using serialized_data: from myproject.model import meta restore_q = loads(serialized_data, meta.metadata, Session) This doesn't seem to do anything... I've tried calling a Session.commit after the fact, individually walking through all the objects in restore_q and adding them, but nothing seems to work. What am I missing? Or is there a better way to do what I'm aiming for? I don't want to shell out and directly touch the database, since SqlAlchemy supports different database engines.

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• Finding underlying cause of Window 7 Account corruption.

  - by Carl Jokl

  I have been having trouble with my Sister's computer which I built. It is running Windows 7 Ultimate x64. The problem is that I have had problems with the accounts becoming corrupted. First problems manifest themselves in the form of Windows saying the profile failed to be loaded properly and a temporary profile. Eventually the account will not allow login at all. An error message along the lines the authentication service failing the login. I have found information about this problem and how to fix it. The problem being that something has corrupted the account profile and backing up and recreating the accounts fixes the problem. I have been able to fix things and get logins working again but over the period of usually about a week it happens again. Bit by bit the accounts corrupt and then it is back to square one. I am frustrated because I don't know what the underlying cause of the problem is i.e. what is causing the accounts to be corrupted in the first place. At the moment I am just treating the symptoms. I was hoping someone who may have more experience with dealing with this problem might be able to help me find the root cause. Some articles suggest that Norton Internet Security is a big culprit of this problem which is installed. I could try uninstalling Norton and see if it helps. The one thing which is different about this computer to any other I have built is that it has a solid state drive. Actually it has both a hard drive and solid state drive. The documents and settings i.e. the Users directory is stored on the hard drive. This was done following an article about moving the user account data onto a separate drive on Windows 7 which I found on the Internet. Moving the User accounts is more of a pain under Windows 7 and this solution involved creating a low level file system link to the folder from the boot drive (Solid State) to the Hard Drive. The idea is that the computer behaves just as if it is accessing the User's folder from the boot drive but actually the data is stored on the hard drive. This may have nothing to do with the cause of the problem but due to the problem being user account corruption it is a possibility I have not been able to rule out. Any help would be appreciated as I would be glad to see the back of this problem.

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• STL Vectors, pointers and classes

  - by anubis9

  Hey! Let's say i have 2 classes: class Class1 { public: std::vector<CustomClass3*> mVec; public: Class1(); ~Class1() { //iterate over all the members of the vector and delete the objects } }; class InitializerClass2 { private: Class1 * mPtrToClass1; public: InitializerClass2(); void Initialize() { mPtrToClass1->mVec.push_back(new CustomClass3(bla bla parameters)); } }; Will this work? Or the memory allocated in the InitializerClass2::Initialize() method might get corrupted after the method terminates? Thanks!

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• Unhandled exceptions in BackgroundWorker

  - by edg

  My WinForms app uses a number of BackgroundWorker objects to retrieve information from a database. I'm using BackgroundWorker because it allows the UI to remain unblocked during long-running database queries and it simplifies the threading model for me. I'm getting occasional DatabaseExceptions in some of these background threads, and I have witnessed at least one of these exceptions in a worker thread while debugging. I'm fairly confident these exceptions are timeouts which I suppose its reasonable to expect from time to time. My question is about what happens when an unhandled exception occurs in one of these background worker threads. I don't think I can catch an exception in another thread, but can I expect my WorkerCompleted method to be executed? Is there any property or method of the BackgroundWorker I can interrogate for exceptions?

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• Using a JMS Session from different threads

  - by Evan

  From the javadoc for Session it states: A Session object is a single-threaded context for producing and consuming messages. So I understand that you shouldn't use a Session object from two different threads at the same time. What I'm unclear on is if you could use the Session object (or children such as a Queue) from a different thread than the one it created. In the case I'm working on, I'm considering putting my Session objects into a pool of available sessions that any thread could borrow from, use, and return to the pool when it is finished with it. Is this kosher? (Using ActiveMQ BTW, if that impacts the answer at all.)

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• Hard freeze on new computer

  - by mphair

  OCZ Gold 3x2GB 240-Pin DDR3 SDRAM PC312800 Palit NE5T240SFHD01 GeForce GT240 1GB 128-bit GDDR5 ASUS P7P55D-E LGA 1156 P55 SATA 6Gb/s USB 3.0 ATX Intel Motherboard Intel Core i7-860 Lynnfield 2.8GHz 8MB L3 Cache LGA 1156 95W Quad-Core Processor SAMSUNG 22X Optical drive (DVD+-R/RW) CORSAIR CMPSU-620HX 620W ATX12V V2.2 Windows 7 Ultimate x64 Brand new system (got it from newegg two days ago) and it booted up and installed windows and ran for a day just fine. Yesterday, I boot it up in the afternoon and run various games at full graphics for most of the day. I turn on WoW and play for a few hours and it hard stalls. No numlock switching, no mouse feedback but nothing going wrong on the screen. No BSOD. I wait a bit to see if the stall is just a temporary one, but then force shutdown the computer. Upon reboot, everything seems fine, windows sees that it didn't shut down properly but I go into normal boot and restart WoW. I'm able to load it up and start running around when it freezes again. This time when I restart, it doesn't even get to BIOS. It starts (power goes on) and it just hangs with no output to the monitors. I shut it off and went to bed. This morning, I turned it on and went into BIOS setup. I'm not terribly experienced with messing with BIOS settings but I checked over them the best I could. Everything seems fine so I boot into windows and browse the internet for a bit looking for a solution, hard freeze within 10 minutes. I restart and go into BIOS and check the CPU temperature, 40c. I'm kinda stumped here. Some people say it might be a memory issue, but why would it take so long for it to come up? Could it have been slowly accessing one memory stick at a time and then it just got to a bad one and that's what is causing it to fail? It seems odd that I don't get a BSOD from a hardware failure. Having the screen just halt with no input or output change seems like a software thing to me. Any thoughts?

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• DataBinding and ErrorProvider - How to provide custom error messages?

  - by BeowulfOF

  We use BusinessObjects, implementing IDataErrorInfo and IEditableObject. BindingLists with those Objects are added to BindingSources, those are used to bind UserControls and DataGrids on the forms (WinForms). The BindingSource is additionally set as DataSource to the ErrorProvider of the form. We do use currently TextBoxes for Properties of Type int and short. They are validated inside the BusinessObjects with custom validation, like min/max values, etc. That works fine, since error message form our custom validations show up nicely next to the TextBox. However, if the input is greater than the value of an int (e.g. "9999999999") the BindingSource doesn't even try to enter that Value into the BusinesObject but instead gives the errormessage to the errorprovider like "The value for Int32 was too big.". We do not want to bother our users with "Int32" but want a custom errormessage for that. It is nice, that the BindingSource does provide this feature, but is it possible to provide custom error messages for this?

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• PostgreSQL - disabling constraints

  - by azp74

  I have a table with approx 5 million rows which has a fk constraint referencing the primary key of another table (also approx 5 million rows). I need to delete about 75000 rows from both tables. I know that if I try doing this with the fk constraint enabled it's going to take an unacceptable amount of time. Coming from an Oracle background my first thought was to disable the constraint, do the delete & then reenable the constraint. PostGres appears to let me disable constraint triggers if I am a super user (I'm not, but I am logging in as the user that owns/created the objects) but that doesn't seem to be quite what I want. The other option is to drop the constraint and then reinstate it. I'm worried that rebuilding the constraint is going to take ages given the size of my tables. Any thoughts?

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