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• Tomcat, Hibernate and the java.io.EOFException

  - by Marco

  Hi, My Java application, which uses Hibernate and it's hosted by Tomcat 6.0, gets the following exception after a long time of inactivity when it tries to access the DB: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1963) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2375) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2874) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1623) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1715) at com.mysql.jdbc.Connection.execSQL(Connection.java:3249) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1268) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1403) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208) at org.hibernate.loader.Loader.getResultSet(Loader.java:1812) at org.hibernate.loader.Loader.doQuery(Loader.java:697) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) at org.hibernate.loader.Loader.doList(Loader.java:2232) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2129) at org.hibernate.loader.Loader.list(Loader.java:2124) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1149) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102) Any tips? Thanks

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• getting last insert id .sqlalchemy orm

  - by gummmibear

  Hi i use sqlalchemy, i need some help. import hashlib import sqlalchemy as sa from sqlalchemy import orm from allsun.model import meta t_user = sa.Table("users",meta.metadata,autoload=True) class Duplicat(Exception): pass class LoginExistsException(Exception): pass class EmailExistsException(Exception): pass class User(object): """ def __setattr__(self, key, value): if key=='password' : value=unicode(hashlib.sha512(value).hexdigset()) object.__setattr__(self,key,value) """ def loginExists(self): try: meta.Session.query(User).filter(User.login==self.login).one() except orm.exc.NoResultFound: pass else: raise LoginExistsException() def emailExists(self): try: meta.Session.query(User).filter(User.email==self.email).one() except orm.exc.NoResultFound: pass else: raise EmailExistsException() def save(self): meta.Session.begin() meta.Session.save(self) try: meta.Session.commit() except sa.exc.IntegrityError: raise Duplicat() How can i get inserted id when i call? user = User() user.login = request.params['login'] user.password = hashlib.sha512(request.params['password']).hexdigest() user.email = request.params['email'] user.save()

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• How do find the longest path in a cyclic Graph between two nodes?

  - by Nazgulled

  Hi, I already solved most the questions posted here, all but the longest path one. I've read the Wikipedia article about longest paths and it seems any easy problem if the graph was acyclic, which mine is not. How do I solve the problem then? Brute force, by checking all possible paths? How do I even begin to do that? I know it's going to take A LOT on a Graph with ~18000. But I just want to develop it anyway, cause it's required for the project and I'll just test it and show it to the instructor on a smaller scale graph where the execution time is just a second or two. At least I did all tasks required and I have a running proof of concept that it works but there's no better way on cyclic graphs. But I don't have clue where to start checking all these paths...

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• saving information in file in php

  - by Mac Taylor

  hey guys i want to write a tracking system and now i can save in my Mysql database . but saving information about each ip that visits is a huge work for mysql so i think if i could save the information in a file , then there is no discussion about database and its problems . but to begin this : i realy dont know how to save in a file in a way that i can read it with no problem and show the details this is what is used to insert into my database sql_query("insert into tracking (date_time, ip_address, hostname,referer, page , page_title) values ('".sql_quote($dt)."', '".sql_quote($ipaddr)."', '".sql_quote($hostnm)."','$referer', '".sql_quote($pg)."', '".sql_quote($pagetitle)."')", $dbi); i need to show information about all ips in rows , after saving in a file what should i do to save and show in row order ( table ) php/mysql

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• Loading a UIDatePicker in Landscape on a UINavigationController

  - by Ryan

  I have a custom UINavigationController that supports auto-rotate. I also have a UIDatePicker on one of my views that I throw onto the stack of the Navigation controller. The auto-rotate works if I start the date picker view in portrait and then rotate it. If I try load the date picker view in landscape to begin with, the view is all messed up. It looks like it would if it didn't support rotation and the frame only has about half of the picker visible and off center. I've tried making my own date picker that supports auto-rotate in case that was the problem, I've tried creating two different views and swapping them out, and I've tried changing the view frame size on the ViewWillAppear method. None of them seem to be working for me as of yet. Anyone have any suggestions on how to get the date picker to show up in landscape correctly on a navigation controller? I probably am overlooking something simple and the answer is right in front of me, but I'm not finding it.

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• Linked Server related

  - by rmdussa

  I have two instances of SQL Server: Server1 (SQL Server 2008) Server2 (SQL Server 2005) I am executing a stored procedure from Server1 which references tables on Server2. It is working fine in my test environment: Server1 runs Vista SP2, SQL Server 2008; Server2 runs Windows XP SP2, SQL Server 2005. However, it is not working in the production environment: Server1 runs Vista SP1, SQL Server 2008; Server2 runs Windows XP SP2, SQL Server 2005. The error message I receive is: OLE DB provider "SQLNCLI10" for linked server "Server2" returned message "No transaction is active.". Msg 7391, Level 16, State 2, Line 21 The operation could not be performed because OLE DB provider "SQLNCLI10" for linked server "Server2" was unable to begin a distributed transaction.

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• Scheme homework problem, need help.

  - by poorStudent

  Okay one of my homework problems is to take a list of lists and return the car of each sublist as a list. I have it to where I can print out the values, but it's not a list. To be honest, I have no clue how to output lists. Here's what I got: (define (car-print alist) (if (null? alist) (newline) (begin (write (car (car alist))) (display " ") (car-print(cdr alist))))) This is a cheap way to do it, perhaps some help on actually solving this problem would be much appreciated. Not necessarily the full answer but steps to get there. Thanks.

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• defining < operator for map of list iterators

  - by Adrian

  I'd like to use iterators from an STL list as keys in a map. For example: using namespace std; list<int> l; map<list<int>::const_iterator, int> t; int main(int argv, char * argc) { l.push_back(1); t[l.begin()] = 5; } However, list iterators do not have a comparison operator defined (in contrast to random access iterators), so compiling the above code results in an error: /usr/include/c++/4.2.1/bits/stl_function.h:227: error: no match for ‘operator<’ in ‘__x < __y’ If the list is changed to a vector, a map of vector const_iterators compiles fine. What is the appropriate way to define the operator < for list::const_iterator?

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• Ruby on Rails - differentiating plural vs singular resource in a REST API

  - by randombits

  I'm working on building the URLs for my REST API before I begin writing any code. Rails REST magic is fantastic, but I'm slightly bothered the formatting of a URL such as: http://myproject/projects/5 where Project is my resource and 5 is the project_id. I think if a user is looking to retrieve all of their projects, then a respective HTTP GET http://myproject/projects makes sense. However if they're looking to retrieve information on a singular resource, such as a project, then it makes sense to have http://myproject/project/5 vs http://myproject/projects/5. Is it best to avoid this headache, or do some of you share a similar concern and even better - have a working solution?

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• GetVersionEx Not Working on Windows 7?!

  - by Andreas Rejbrand

  On my Windows 7 system, the GetVersionEx Windows API function returns "6.0", indicating Windows Vista, when it should return "6.1". If it matters, I used the following Delphi code: function winver: string; var ver: TOSVersionInfo; begin ver.dwOSVersionInfoSize := SizeOf(ver); if GetVersionEx(ver) then with ver do result := IntToStr(dwMajorVersion) + '.' + IntToStr(dwMinorVersion) + '.' + IntToStr(dwBuildNumber) + ' (' + szCSDVersion + ')'; end; and the string "6.0.6002 (Service Pack 2)" was returned. Isn't this highly odd?

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• Global qualification in a class declarations class-head

  - by gf

  We found something similar to the following (don't ask ...): namespace N { struct A { struct B; }; } struct A { struct B; }; using namespace N; struct ::A::B {}; // <- point of interest Interestingly, this compiles fine with VS2005, icc 11.1 and Comeau (online), but fails with GCC: global qualification of class name is invalid before '{' token From C++03, Annex A, it seems to me like GCC is right: the class-head can consist of nested-name-specifier and identifier nested-name-specifier can't begin with a global qualification (::) obviously, neither can identifier ... or am i overlooking something?

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• Eclipse (Springsource Tool Suite 2.3.1) can't resolve dependencies for classes in the same package

  - by Steve

  This started happening when I upgraded my Springsource Toolsuite from 2.3 to 2.3.1. Essentially whenever I do anything, such as open a file, change a file, etc, I have to do a clean. Everything works fine when I do mvn commands on the command line, which leads me to believe that Eclipse is looking in the wrong place for compiled code or something along those lines, although that is entirely superstitious at this point. Example: I make a change to com.foo.mypackage.MyClass. Suddenly a bunch of tests that excercise MyClass get the red x - for class not found! In src/main/test: com.foo.DbUnitTest com.foo.mypackage.FooTest extends DbUnitTest DbUnitTest gets a class not found. I do a clean, and everything is fine. I touch something, and it breaks again :(. I don't really know where to begin on how to troubleshoot this.

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• Iterator for boost::variant

  - by Ivan

  Hy there, I'm trying to adapt an existing code to boost::variant. The idea is to use boost::variant for a heterogeneous vector. The problem is that the rest of the code use iterators to access the elements of the vector. Is there a way to use the boost::variant with iterators? I've tried typedef boost::variant<Foo, Bar> Variant; std::vector<Variant> bag; std::vector<Variant>::iterator it; for(it= bag.begin(); it != bag.end(); ++it){ cout<<(*it)<<endl; } But it didn't work.

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• Class Type Expected error on TableAdapter constructor

  - by Chris Franz

  I am using Delphi Prism to connect to an Advantage Database Server. I created a connection using the server explorer to the database. I added a dataset object to my project and added a table to the dataset. Everything works fine in the IDE, however, I get an error in the generated designer code on the table adapter constructor. The error is: (PE26) Class type expected. Here is the generated code: { Presidents.PresidentsTableAdapters.USPRESIDENTSTableAdapter } constructor Presidents.PresidentsTableAdapters.USPRESIDENTSTableAdapter; begin self.ClearBeforeFill := true; end;

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• HTML Form Upload PDF with other form contents using PHP

  - by Sev

  I have a HTML form with fields such as name, address, notes, etc. I also have a field to upload a PDF. The uploaded PDF get's stored on the file system. How can I accomplish this if possibly the PDF files are larger than 2 MBs? Also, for some reason, the uploading of the PDF (< 2 MBs) works fine in Chrome, but not in IE. In IE, the upload doesn't even begin, but in Chrome, it completes fine. Form header looks like: method='post' ENCTYPE='multipart/formdata' edit: the ini setting didn't help The HTML <input type='text' name='user' /> <input type='file' name='userfile' /> The basic PHP ( I do some preg matching above, that I haven't included) $uploaddir = 'uploads/'; $uploadfile = $uploaddir . basename($_FILES['userfile']['name']); if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) { echo "File is valid, and was successfully uploaded.\n"; } else { echo "File uploading failed.\n"; }

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• Expression Engine Template Exporting

  - by Lark

  I have a project that was developed into a Expression Engine template. I used the Core version of EE to develop this template on my local machine. Now I need to export this template/weblog so it can be loaded onto the production server so the client can begin using EE to update their site. The issue I am running into is how to export the templates plus the weblogs that go along with the template. This is my first time using EE so if you know how to accomplish this please explain it in detail. Thank you in advance.

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• What is wrong with mysql query?

  - by bala3569

  I use the following mysql query, DELIMITER $$ DROP PROCEDURE IF EXISTS `allied`.`aboutus_delete`$$ CREATE DEFINER=`allied`@`%` PROCEDURE `aboutus_delete`( IN p_Id int(11) ) BEGIN if exists(select aboutUsId from aboutus where aboutUsId=p_id and isDeleted=0) update aboutus set isDeleted=1 where aboutUsId=p_id else select 'No record to delete' END$$ DELIMITER ; But i get this error when i execute it... Error Code : 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'update aboutus set isDeleted=1 where aboutUsId=p_id else select 'No record to' at line 6

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• Control.EndInvoke resets call stack for exception

  - by Brian Rasmussen

  I don't do a lot of Windows GUI programming, so this may all be common knowledge to people more familiar with WinForms than I am. Unfortunately I have not been able to find any resources to explain the issue, I encountered today during debugging. If we call EndInvoke on an async delegate. We will get any exception thrown during execution of the method re-thrown. The call stack will reflect the original source of the exception. However, if we do something similar on a Windows.Forms.Control, the implementation of Control.EndInvoke resets the call stack. This can be observed by a simple test or by looking at the code in Reflector. The relevant code excerpt from EndInvoke is here: if (entry.exception != null) { throw entry.exception; } I understand that Begin/EndInvoke on Control and async delegates are different, but I would have expected similar behavior on Control.EndInvoke. Is there any reason Control doesn't do whatever it is async delegates do to preserve the original call stack?

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• DROP TABLE fails for temp table

  - by StarBright

  I have a client application that creates a temp table, the performs a bulk insert into the temp table, then executes some SQL using the table before deleting it. Pseudo-code: open connection begin transaction CREATE TABLE #Temp ([Id] AS int) bulk insert 500 rows into #Temp UPDATE [OtherTable] SET [Status]=0 WHERE [Id] IN (SELECT [Id] FROM #Temp) AND [Group]=1 DELETE FROM #Temp WHERE [Id] IN (SELECT [Id] FROM [OtherTable] WHERE [Group]=1) INSERT INTO [OtherTable] ([Group], [Id]) SELECT 1 as [Group], [DocIden] FROM #Temp DROP TABLE #Temp COMMIT TRANSACTION CLOSE CONNECTION This is failing with an error on the DROP statement: Cannot drop the table '#Temp', because it does not exist or you do not have permission. I can't imagine how this failure could occur without something else going on first, but I don't see any other failures occurring before this. Is there anything that I'm missing that could be causing this to happen?

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• MySQL Stored Procedure: Boolean Logic in IF THEN

  - by xncroft

  I'm looking for the proper syntax (if this is possible in MySQL stored procedures) for using logical operators in an IF THEN statement. Here's something along the lines of what I would like to do, but I'm not certain if I should type "OR" or "||" in the IF ... THEN clause: DELIMITER $$ CREATE PROCEDURE `MyStoredProc` (_id INT) BEGIN DECLARE testVal1 INT DEFAULT 0; DECLARE testVal2 INT DEFAULT 0; SELECT value1, value2 INTO testVal1, testVal2 FROM ValueTable WHERE id = _id; IF testVal1 > 0 OR testVal2 > 0 THEN UPDATE ValueTable SET value1 = (value1+1) WHERE id=_id; END IF; END$$

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• SQL Server Process Queue Race Condition

  - by William Edmondson

  I have an order queue that is accessed by multiple order processors through a stored procedure. Each processor passes in a unique ID which is used to lock the next 20 orders for its own use. The stored procedure then returns these records to the order processor to be acted upon. There are cases where multiple processors are able to retrieve the same 'OrderTable' record at which point they try to simultaneously operate on it. This ultimately results in errors being thrown later in the process. My next course of action is to allow each processor grab all available orders and just round robin the processors but I was hoping to simply make this section of code thread safe and allow the processors to grab records whenever they like. So Explicitly - Any idea why I am experiencing this race condition and how I can solve the problem. BEGIN TRAN UPDATE OrderTable WITH ( ROWLOCK ) SET ProcessorID = @PROCID WHERE OrderID IN ( SELECT TOP ( 20 ) OrderID FROM OrderTable WITH ( ROWLOCK ) WHERE ProcessorID = 0) COMMIT TRAN SELECT OrderID, ProcessorID, etc... FROM OrderTable WHERE ProcessorID = @PROCID

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• Running Perl Scripts on servers that don't have the modules

  - by envinyater

  I need to run a perl script to gather system information that will be deployed and executed on different unix servers. Right now I am writing it and testing it, and I'm receiving this error. Can't locate XML/DOM.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at test.pl line 7. BEGIN failed--compilation aborted at test.pl line 7. So I am simply using XML::DOM which should be part of Perl but it isn't for this version on this particular server which is 5.10.1. Anyways, is there a way I can create and design my script and package modules into it while keeping the .pl extension, which is the requirement for this script?

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• Django model manager didn't work with related object when I do aggregated query

  - by Satoru.Logic

  Hi, all. I'm having trouble doing an aggregation query on a many-to-many related field. Let's begin with my models: class SortedTagManager(models.Manager): use_for_related_fields = True def get_query_set(self): orig_query_set = super(SortedTagManager, self).get_query_set() # FIXME `used` is wrongly counted return orig_query_set.distinct().annotate( used=models.Count('users')).order_by('-used') class Tag(models.Model): content = models.CharField(max_length=32, unique=True) creator = models.ForeignKey(User, related_name='tags_i_created') users = models.ManyToManyField(User, through='TaggedNote', related_name='tags_i_used') objects_sorted_by_used = SortedTagManager() class TaggedNote(models.Model): """Association table of both (Tag , Note) and (Tag, User)""" note = models.ForeignKey(Note) # Note is what's tagged in my app tag = models.ForeignKey(Tag) tagged_by = models.ForeignKey(User) class Meta: unique_together = (('note', 'tag'),) However, the value of the aggregated field used is only correct when the model is queried directly: for t in Tag.objects.all(): print t.used # this works correctly for t in user.tags_i_used.all(): print t.used #prints n^2 when it should give n Would you please tell me what's wrong with it? Thanks in advance.

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• WCF Deserialization Error

  - by BK

  ERROR - Exception: System.ServiceModel.Dispatcher.NetDispatcherFaultException Message: The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter services.gmrlive.com/JupiterMobile/2009/01/01/:StatusDetails. The InnerException message was 'There was an error deserializing the object of type X.X.X.Entities.StatusDetailCollection. Name cannot begin with the '5' character, hexadecimal value 0x35. Line 12, position 45.'. I am tracing the wcf logs but i am unable to see the actual xml message. It fails to log the malformed message. Can anyone help?

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• jQuery append value to html input depending on other input

  - by werm

  Ok, the title is a bit confusing, but here's my predicament. I've made a web app to track UPS packages internally at work. Currently, you input the tracking number and then select the city it was shipped from. All tracking numbers from an account start with the same X amount of numbers. So if someone entered "1Z8473..." into one input, "Houston, TX" would automatically be entered into the next input. Is this a difficult thing to pull off? Where would I begin?

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