2011 - Page 117 - Developer IT

Where do I put jar files in Tomcat 6?

- by Simon

I am having trouble getting my JSP page to load a Java class which is in a jar file. The message I get appears to indicate a class not found exception: Jan 6, 2011 12:21:45 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet jsp threw exception org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 72 in the jsp file: /xmlloader.jsp FactArray cannot be resolved to a type 69: sourceType = "1"; 70: } 71: 72: FactArray fa = new FactArray(); 73: Fact f; 74: 75: /***********************/ The Type FactArray is one of my classes in a package com.mypackage.fact.FactArray which exists in myjar.jar. myjar.jar is a separate Java project (using NetBeans, but I don't think that's relevant). I include the package in my JSP as follows: <%@ page import="com.mypackage.fact.*" %> I deploy my web site and JSPs into Tomcat 6 as a WAR file. I include myjar.jar in that WAR in WEB-INF/lib but that doesn't work. I tried putting myjar.jar in my tomcat/lib folder, but that doesn't work either. I have bounced the server several times between changes. I have read a whole bunch of questions on here which say "put it in WEB-INF/lib" but that isn't working, so I'm asking my own question. Where do I need to put common JAR files so they get picked up by Tomcat?

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"ImportError: cannot import name Exchange" when using Celery w/ Kombu installed

- by alukach

I'm trying to create a Celery worker node on an Amazon EC2 Windows2008 R2 instance. Due to a plugin we require for another Python module, we are required to user Python3. I've installed Python3.2 and necessary modules and run Celery, but for some reason it states that it can't import Exchange and Queue from Kombu, despite the face that Kombu is installed and can be imported by python. Microsoft Windows [Version 6.1.7601] Copyright (c) 2009 Microsoft Corporation. All rights reserved. C:\Users\Administrator>celery Traceback (most recent call last): File "C:\Python32\Scripts\celery-script.py", line 9, in <module> load_entry_point('celery==3.0.11', 'console_scripts', 'celery')() File "C:\Python32\lib\site-packages\celery\__main__.py", line 13, in main from celery.bin.celery import main File "C:\Python32\lib\site-packages\celery\bin\celery.py", line 21, in <module> from celery.utils import term File "C:\Python32\lib\site-packages\celery\utils\__init__.py", line 22, in <module> from kombu import Exchange, Queue ImportError: cannot import name Exchange C:\Users\Administrator>python Python 3.2 (r32:88445, Feb 20 2011, 21:29:02) [MSC v.1500 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> from kombu import Exchange, Queue >>> print('WTF?!?') WTF?!? >>> This problem seems similar to this and this, but I have not been able to remedy the issue. Any ideas?

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jQuery tooltip: Trouble with remove()

- by Rosarch

I'm using a jQuery tooltip plugin. I have HTML like this: <li class="term ui-droppable"> <strong>Fall 2011</strong> <li class="course ui-draggable">Biological Statistics I<a class="remove-course-button" href="">[X]</a></li> <div class="term-meta-data"> <p class="total-credits too-few-credits">Total credits: 3</p> <p class="median-GPA low-GPA">Median Historical GPA: 2.00</p> </div> </li> I want to remove the .course element. So, I attach a click handler to the <a>: function _addDeleteButton(course, term) { var delete_button = $('<a href="" class="remove-course-button" title="Remove this course">[X]</a>'); course.append(delete_button); $(delete_button).click(function() { course.remove(); return false; }).tooltip(); } This all works fine, in terms of attaching the click handler. However, when course.remove() is called, Firebug reports an error in tooltip.js: Line 282 tsettings is null if ((!IE || !$.fn.bgiframe) && tsettings.fade) { What am I doing wrong? If the link has a tooltip attached, do I need to remove it specially? UPDATE: Removing .tooltip() solve the problem. I'd like to keep it in, but that makes me suspect that my use of .tooltip() is incorrect here.

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How 'terse' is too terse? -- Practical guidelines for expressing as much intent in as few characters

- by Christopher Altman

First, I love writing as little code as possible. I think, and please correct me, one of the golden rules of programming is to express your code in as few of character as possible while maintaining human readability. But I can get a little carried away. I can pack three or four lines into one statement, something like $startDate = $dateTime > time() ? mktime(0,0,0,date('m',time()-86400),date('d',time()*2),2011) : time(); (Note: this is a notional example) I can comprehend the above code when reading it. I prefer 'mushing' it all together because having less lines per page is a good thing to me. So my question: When writing code and thinking about how compact or terse you can express yourself, what are some guidelines you use? Do you write multiple lines because you think it helps other people? Do you write as little as possible, but use comments? Or do you always look for the way to write as little code as possible and enjoy the rewards of compact statements? (Just one slightly off topic comment: I love the Perl one-liners, but that is not what I am talking about here)

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How do I improve my performance with this singly linked list struct within my program?

- by Jesus

Hey guys, I have a program that does operations of sets of strings. We have to implement functions such as addition and subtraction of two sets of strings. We are suppose to get it down to the point where performance if of O(N+M), where N,M are sets of strings. Right now, I believe my performance is at O(N*M), since I for each element of N, I go through every element of M. I'm particularly focused on getting the subtraction to the proper performance, as if I can get that down to proper performance, I believe I can carry that knowledge over to the rest of things I have to implement. The '-' operator is suppose to work like this, for example. Declare set1 to be an empty set. Declare set2 to be a set with { a b c } elements Declare set3 to be a set with ( b c d } elements set1 = set2 - set3 And now set1 is suppose to equal { a }. So basically, just remove any element from set3, that is also in set2. For the addition implementation (overloaded '+' operator), I also do the sorting of the strings (since we have to). All the functions work right now btw. So I was wondering if anyone could a) Confirm that currently I'm doing O(N*M) performance b) Give me some ideas/implementations on how to improve the performance to O(N+M) Note: I cannot add any member variables or functions to the class strSet or to the node structure. The implementation of the main program isn't very important, but I will post the code for my class definition and the implementation of the member functions: strSet2.h (Implementation of my class and struct) // Class to implement sets of strings // Implements operators for union, intersection, subtraction, // etc. for sets of strings // V1.1 15 Feb 2011 Added guard (#ifndef), deleted using namespace RCH #ifndef _STRSET_ #define _STRSET_ #include <iostream> #include <vector> #include <string> // Deleted: using namespace std; 15 Feb 2011 RCH struct node { std::string s1; node * next; }; class strSet { private: node * first; public: strSet (); // Create empty set strSet (std::string s); // Create singleton set strSet (const strSet &copy); // Copy constructor ~strSet (); // Destructor int SIZE() const; bool isMember (std::string s) const; strSet operator + (const strSet& rtSide); // Union strSet operator - (const strSet& rtSide); // Set subtraction strSet& operator = (const strSet& rtSide); // Assignment }; // End of strSet class #endif // _STRSET_ strSet2.cpp (implementation of member functions) #include <iostream> #include <vector> #include <string> #include "strset2.h" using namespace std; strSet::strSet() { first = NULL; } strSet::strSet(string s) { node *temp; temp = new node; temp->s1 = s; temp->next = NULL; first = temp; } strSet::strSet(const strSet& copy) { if(copy.first == NULL) { first = NULL; } else { node *n = copy.first; node *prev = NULL; while (n) { node *newNode = new node; newNode->s1 = n->s1; newNode->next = NULL; if (prev) { prev->next = newNode; } else { first = newNode; } prev = newNode; n = n->next; } } } strSet::~strSet() { if(first != NULL) { while(first->next != NULL) { node *nextNode = first->next; first->next = nextNode->next; delete nextNode; } } } int strSet::SIZE() const { int size = 0; node *temp = first; while(temp!=NULL) { size++; temp=temp->next; } return size; } bool strSet::isMember(string s) const { node *temp = first; while(temp != NULL) { if(temp->s1 == s) { return true; } temp = temp->next; } return false; } strSet strSet::operator + (const strSet& rtSide) { strSet newSet; newSet = *this; node *temp = rtSide.first; while(temp != NULL) { string newEle = temp->s1; if(!isMember(newEle)) { if(newSet.first==NULL) { node *newNode; newNode = new node; newNode->s1 = newEle; newNode->next = NULL; newSet.first = newNode; } else if(newSet.SIZE() == 1) { if(newEle < newSet.first->s1) { node *tempNext = newSet.first; node *newNode; newNode = new node; newNode->s1 = newEle; newNode->next = tempNext; newSet.first = newNode; } else { node *newNode; newNode = new node; newNode->s1 = newEle; newNode->next = NULL; newSet.first->next = newNode; } } else { node *prev = NULL; node *curr = newSet.first; while(curr != NULL) { if(newEle < curr->s1) { if(prev == NULL) { node *newNode; newNode = new node; newNode->s1 = newEle; newNode->next = curr; newSet.first = newNode; break; } else { node *newNode; newNode = new node; newNode->s1 = newEle; newNode->next = curr; prev->next = newNode; break; } } if(curr->next == NULL) { node *newNode; newNode = new node; newNode->s1 = newEle; newNode->next = NULL; curr->next = newNode; break; } prev = curr; curr = curr->next; } } } temp = temp->next; } return newSet; } strSet strSet::operator - (const strSet& rtSide) { strSet newSet; newSet = *this; node *temp = rtSide.first; while(temp != NULL) { string element = temp->s1; node *prev = NULL; node *curr = newSet.first; while(curr != NULL) { if( element < curr->s1 ) break; if( curr->s1 == element ) { if( prev == NULL) { node *duplicate = curr; newSet.first = newSet.first->next; delete duplicate; break; } else { node *duplicate = curr; prev->next = curr->next; delete duplicate; break; } } prev = curr; curr = curr->next; } temp = temp->next; } return newSet; } strSet& strSet::operator = (const strSet& rtSide) { if(this != &rtSide) { if(first != NULL) { while(first->next != NULL) { node *nextNode = first->next; first->next = nextNode->next; delete nextNode; } } if(rtSide.first == NULL) { first = NULL; } else { node *n = rtSide.first; node *prev = NULL; while (n) { node *newNode = new node; newNode->s1 = n->s1; newNode->next = NULL; if (prev) { prev->next = newNode; } else { first = newNode; } prev = newNode; n = n->next; } } } return *this; }

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FQL query using stream table doesn't accept app access token

- by tougher

I've searched stackoverflow all day long to find an answer without luck, so here we go. I'm trying to fetch data from the stream table like this: FQL: SELECT post_id, message, created_time FROM stream WHERE source_id = 131559313586863 URL: http:// graph.facebook.com/fql?q=SELECT+post_id%2C+message%2C+created_time+FROM+stream+WHERE+source_id+%3D+131559313586863&access_token=10669xxxxx74470|PF-7GSdBx0Nxxxxxkdi1KwSQG-w But I get a 400 Bad Request as response with the error message: "An access token is required to request this resource.". I'm fetching an application access token with this url: https:// graph.facebook.com/oauth/access_token?client_id=FACEBOOK_APP_ID&client_secret=FACEBOOK_APP_SECRET&grant_type=client_credentials Facebook state in this blog post that "You will need to pass a valid app or user access token to access this functionality.". Functionality refers to /feed and /posts (the stream table). Futhermore this wiki tells the same story about using the stream table, "From June 3 2011 a token is required to query this table. You can use any application or user token to make the query.". Does anyone see my hopefully obvious flaw? Please note: The profile in the FQL query is public. I need this to run userless though a cronjob. No user interaction is possible. The request works if I replace the app access token with my own user token from https:// developers.facebook.com/tools/explorer Sorry for breaking the URL's. I need more reputation to post more than 2 links :-/

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Why does C++ not allow multiple types in one auto statement?

- by Walter

The 2011 C++ standard introduced the new keyword auto, which can be used for defining variables instead of a type, i.e. auto p=make_pair(1,2.5); // pair<int,double> auto i=std::begin(c), end=std::end(c); // decltype(std::begin(c)) In the second line, i and end are of the same type, referred to as auto. The standard does not allow auto i=std::begin(container), e=std::end(container), x=*i; when x would be of different type. My question: why does the standard not allow this last line? It could be allowed by interpreting auto not as representing some to-be-decuded type, but as indicating that the type of any variable declared auto shall be deduced from its assigned value. Is there any good reason for the C++11 standard to not follow this approach? There is actually a use case for this, namely in the initialisation statement of for loops: for(auto i=std::begin(c), end=std::end(c), x=*i; i!=end; ++i, x+=*i) { ... } when the scope of the variables i, end, and x is limited to the for loop. AFAIK, this cannot be achieved in C++ unless those variables have a common type. Is this correct? (ugly tricks of putting all types inside a struct excluded) There may also be use cases in some variadic template applications.

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Ideas Related to Subset Sum with 2,3 and more integers

- by rolandbishop

I've been struggling with this problem just like everyone else and I'm quite sure there has been more than enough posts to explain this problem. However in terms of understanding it fully, I wanted to share my thoughts and get more efficient solutions from all the great people in here related to Subset Sum problem. I've searched it over the Internet and there is actually a lot sources but I'm really willing to re-implement an algorithm or finding my own in order to understand fully. The key thing I'm struggling with is the efficiency considering the set size will be large. (I do not have a limit, just conceptually large). The two phases I'm trying to implement ideas on is finding two numbers that are equal to given integer T, finding three numbers and eventually K numbers. Some ideas I've though; For the two integer part I'm thing basically sorting the array O(nlogn) and for each element in the array searching for its negative value. (i.e if the array element is 3 searching for -3). Maybe a hash table inclusion could be better, providing a O(1) indexing the element? For the three or more integers I've found an amazing blog post;http://www.skorks.com/2011/02/algorithms-a-dropbox-challenge-and-dynamic-programming/. However even the author itself states that it is not applicable for large numbers. So I was for 2 and 3 and more integers what ideas could be applied for the subset problem. I'm struggling with setting up a dynamic programming method that will be efficient for the large inputs as well.

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Display Yearly Report When Data Not Available (CI, PHP, MySQL)

- by tegaralaga

First of all, i do apologize for my bad english, cos english isn't my native language. I want to display yearly report based on month, let say i got order on January, August, December, but the rest there's no order. So in MySQL database only have 3 order (Jan,Aug,Dec). When i query use CI ( select month(order_date) as month_name , count(order_id) as amount from order where year(order_date)=2011 group by month(order_date) ) there's only 3 data let say the 3 data is (use $query-result_array()) Array ( [0] => Array ( [month_num] => 1 [amount] => 4 ) [1] => Array ( [month_num] => 8 [amount] => 1 ) [2] => Array ( [month_num] => 12 [amount] => 19 ) ) how to make it to 12 data (12 Month) the array become like this (when data not available the amount is 0) Array ( [0] => Array ( [month_num] => 1 [amount] => 4 ) [1] => Array ( [month_num] => 2 [amount] => 0 ) [2] => Array ( [month_num] => 3 [amount] => 0 ) etc ) Thanks in advance :)

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How to add namespaces to a flex AIR project in Flash Builder 4?

- by milkplus

In my ant build.xml script I have... <namespace uri="http://ns.foo.com/mxml/2011" manifest="src/manifest.xml"/> <namespace uri="library://ns.adobe.com/flex/spark" manifest="flex_src/spark-manifest.xml"/> <namespace uri="http://www.adobe.com/2006/mxml" manifest="flex_src/mx-manifest.xml"/> That works! But... I'm not sure how to add these namespaces to my project properties in Flash Builder 4 so I can debug. When I try, it changes this line in my .actionScriptProperties <compiler additionalCompilerArguments="-namespace http://ns.foo.com/mxml/2011 src/manifest.xml -namespace=library://ns.adobe.com/flex/spark flex_src/spark-manifest.xml -namespace http://www.adobe.com/2006/mxml flex_src/mx-manifest.xml" autoRSLOrdering="true" copyDependentFiles="true" fteInMXComponents="false" generateAccessible="true" htmlExpressInstall="true" htmlGenerate="false" htmlHistoryManagement="false" htmlPlayerVersionCheck="true" includeNetmonSwc="false" outputFolderPath="bin-debug" sourceFolderPath="src" strict="true" targetPlayerVersion="0.0.0" useApolloConfig="true" useDebugRSLSwfs="true" verifyDigests="true" warn="true"> but gives me a "no default arguments are expected" error. What is the reason for this error? The error location is "Unknown" and seems to refer to these compiler arguments.

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Apache ReWriteEngine throwing 500 Internal Server Error for too many internal redirects... why?!?!?!

- by Stephen G

I'm trying to implement a new ReWrite rule on my local dev machine. I have 13 rules set up already, and all work fine (even as of this writing). However, for some reason the newest one is throwing me 500 Internal Server Errors. The ReWrite rule is: RewriteRule stuff/public_html/vault/mystuff/view/(.*) /stuff/public_html/vault/mystuff/view/index.php?stuff=$1 RewriteRule stuff/public_html/vault/mystuff/view/(.*)/ /stuff/public_html/vault/mystuff/view/index.php?stuff=$1 Checked my apache logs and got this: [Thu Jan 13 22:07:43 2011] [error] [client ::1] mod_rewrite: maximum number of internal redirects reached. Assuming configuration error. Use 'RewriteOptions MaxRedirects' to increase the limit if neccessary., referer: http://localhost:8888/stuff/public_html/vault/mystuff/all/index.php?curr=7 On the script I am trying to redirect to view/index.php?stuff=$1, there is nothing that even remotely resembles a redirect of any kind. I do have a very, very basic session verifier being called at the top of the landing script, which is as follows: //Start session session_start(); //Check whether the session variable SESS_MEMBER_ID is present or not if(!isset($_SESSION['SESS_MEMBER_ID']) || (trim($_SESSION['SESS_MEMBER_ID']) == '')) { header("location: ".$root_http.""); exit(); } However, when I access the page directly, it acts as it should, and there is no redirect. All of my other ReWrite rules and their corresponding landing pages are set up the exact same way. This is blowing my mind. Any help, PLEASE!?

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Pull/Clone a svn repository into hg with new default branch name?

- by TheLQ

I'm forking a project's SVN repo and need to integrate into my Mercurial repo. To keep things simple I have a local hgsubversion repo and a local hg repo. However both the mercurial and hgsubversion repo uses default as their default branch name. My goal here is to put the original code and updates on one branch and my code on the default branch However I have yet to be able to do this. W:\programming\tcsite-svn-test>hg clone http://*HG_SITE*/hg . no changes found updating to branch default 0 files updated, 0 files merged, 0 files removed, 0 files unresolved W:\programming\tcsite-svn-test>hg branch blizzard marked working directory as branch blizzard W:\programming\tcsite-svn-test>hg commit W:\programming\tcsite-svn-test>hg log changeset: 0:be13a9580df0 branch: blizzard tag: tip user: Leon Blakey <[email protected]> date: Fri Jan 14 23:44:25 2011 -0500 summary: Created Blizzard Branch W:\programming\tcsite-svn-test>hg pull http://*SVN_SITE*/svn/ pulling from http://*SVN_SITE*/svn/ .... pulled 23 revisions (run 'hg update' to get a working copy) W:\programming\tcsite-svn-test>hg branch blizzard W:\programming\tcsite-svn-test>hg branches default 23:93642a8890ab <------ blizzard 0:be13a9580df0 Not surprisingly, hgsubversion puts pulled commits into the default branch when I really need them in the blizzard branch. From the docs, there is no way to rename the branch that a commit came from. Frustratingly I can't even come up with a way to do it on a repo with only the hgsubversion repo being pulled from, nothing else. All commits are tied to that one branch no matter what. Is there any suggestions on how to pull changes from an SVN repo and rename the branch to something else?

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Javascript array of dates - not iterating properly (jquery ui datepicker)

- by PaulB

Hi I have some code which builds an array of date ranges. I then call a function, passing it a date, and compare that date with dates in the array. I'm doing it this way because the dates are stored in a cms, and I'm manipulating the JqueryUI datepicker. Unfortunately my code only checks the first date range in the array - and I can't figure out why! I think it's probably something simple (/stupid!) - if anyone can shed some light on it I'd be extremely grateful! The code is below - the june-september range works fine, the december to jan is totally ignored... <script type="text/javascript" language="javascript"> var ps1 = new Date(2010, 06-1, 18); var pe1 = new Date(2010, 09-1, 03); var ps2 = new Date(2010, 12-1, 20); var pe2 = new Date(2011, 01-1, 02); var peakStart = new Array(ps1,ps2); var peakEnd = new Array(pe1,pe2); function checkDay(date) { var day = date.getDay(); for (var i=0; i<peakStart.length; i++) { if ((date > peakStart[i]) && (date < peakEnd[i])) { return [(day == 5), '']; } else { return [(day == 1 || day == 5), '']; } } } </script>

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python tkinter gui

- by Lewis Townsend

I'm wanting to make a small python program for yearly temperatures. I can get nearly everything working in the standard console but I'm wanting to implement it into a GUI. The program opens a csv file reads it into lists, works out the average, and min & max temps. Then on closing the application will save a summary to a new text file. I am wanting the default start up screen to show All Years. When a button is clicked it just shows that year's data. Here is a what I want it to look like. Pretty simple layout with just the 5 buttons and the out puts for each. I can make up the buttons for the top fine with: Code: class App: def __init__(self, master): frame = Frame(master) frame.pack() self.hi_there = Button(frame, text="All Years", command=self.All) self.hi_there.pack(side=LEFT) self.hi_there = Button(frame, text="2011", command=self.Y1) self.hi_there.pack(side=LEFT) self.hi_there = Button(frame, text="2012", command=self.Y2) self.hi_there.pack(side=LEFT) self.hi_there = Button(frame, text="2013", command=self.Y3) self.hi_there.pack(side=LEFT) self.hi_there = Button(frame, text="Save & Exit", command=self.Exit) self.hi_there.pack(side=LEFT) I'm not sure as to how to make the other elements, such as the title & table. I was going to post the code of the small program but decided not to. Once I have the structure/framework I think I can populate the fields & I might learn better this way. Using Python 2.7.3

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How can I return the number of rows affected in sqlplus to a shell script?

- by jessica

Here is my shell script: # Deletes data from the 'sample' table starting August 30, 2011. # This is done in stages with a 7 second break every # 2 seconds or so to free up the database for other users. # The message "Done." will be printed when there are # no database entries left to delete. user="*****" pass="*****" while(true); do starttime=`date +%s` while [[ $((`date +%s` - $starttime)) -lt 2 ]]; do sqlplus $user/$pass@//blabla <<EOF whenever sqlerror exit 1 delete from sample where sampletime >= to_date('08-30-2011','mm-dd-yyyy') and rownum <= 2; commit; EOF rows = ??? if [ $rows -eq 0 ] ; then echo "Done." exit 0; fi done sleep 7 done If there is no way to get the number of rows, maybe I can use an error code returned by sqlplus to figure out when to end the script? Any thoughts? Thank you!

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Why are Facebook Likes Insisting on using Wrong Product Image...?

- by Joan Kent

Firstly, I'm not a web developer so please be patient. I have read the other posts but I think i have everything covered. My website http://www.joaniesgifts.co.uk includes the like button on the product pages. However, I've found that certain product pages are using the incorrect image when a user likes the page. For example - http://www.joaniesgifts.co.uk/terramundi-money-pots/terramundi-money-pot-holiday-fund I think this may have been down to an original incorrect setup which is now corrected. However, the problem remains... The only thing I have to go on :- if i use the facebook url linter (developers.facebook.com/tools/debug) on the above product page, I receive the following error :- Object at URL 'http://www.joaniesgifts.co.uk/terramundi-money-pot-holiday-fund' of type '213689662010141:product' is invalid because the domain 'www.joaniesgifts.co.uk' is not allowed for the application id '213689662010141' which owns the specified object type. If you are the owner of this application, you can verify your configured 'Site Domain' at developers.facebook.com/apps/213689662010141. (I have verified my site's domain) Everything else appears fine except it is also showing the wrong image!! However, under Raw Open Graph Document Information it has the correct link! If I then click graph api - graph.facebook.com/10150450766583352 it again shows the wrong image was linked! I've no idea what else to do - can you help me? Kind Regards, Joan PS Graph API shows the incorrect image after a scrape only minutes ago { "url": "http://www.joaniesgifts.co.uk/terramundi-money-pot-holiday-fund", "type": "website", "title": "Terramundi Money Pot - Holiday Fund", "image": [ { "url": "http://www.joaniesgifts.co.uk/index.php?route=product\u00252Fproduct\u00252Fcaptcha" } ], "updated_time": "2011-11-11T18:54:38+0000", "id": "10150450766583352" }

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Hibernate saveorUpdate method problem

- by umesh awasthi

Hi all, i am trying to work on with Hibernate (Database side for first time) and some how struck in choosing best possible way to use saveOrUpdate or Save.Update i have a destination POJO class and its other attributes which needs to be updated along with the Destination entity. i am getting an XML file to be imported and i am using the following code to update/save the destination entity along with its attribute classes. try{ getSessionFactory().getCurrentSession().beginTransaction(); getSessionFactory().getCurrentSession().saveOrUpdate(entity); getSessionFactory().getCurrentSession().getTransaction().commit(); } catch(Exception e){ getSessionFactory().getCurrentSession().getTransaction().rollback(); } finally{ getSessionFactory().close(); } everything is working fine untill i am using the same session instance.but later on when i am using the same XML file to update the destination PO for certain attributes it giving me the following error. SEVERE: Duplicate entry 'MNLI' for key 'DESTINATIONID' 9 Jan, 2011 4:58:11 PM org.hibernate.event.def.AbstractFlushingEventListener performExecutions SEVERE: Could not synchronize database state with session org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:94) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275) at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:114) at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:109) at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:244) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2242) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2678) at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:79) i am using UUID as primary key for the Destination table and in destination table i have a destination id which is unique.but i can understand that in the secodn case hibernate is not able to find if there is already an entry for the same destination in the DB and trying to execute insert statement rather than update. one possible solution is i can user destinationid to check if there is already a destination inplace with the given id and based on the results i can issue save or update command. my question is can this be achieve by any other good way..? Thanks in advance

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Need an Overview of Possibilities for multicolumn programming

- by Sam

Hi folks, From source1 and source2 i gather that IE9 will NOT support multi-column css3!! Since it is still the most popular browser (another thing i cannot understand), i am left but no other choice than to use Programming Power to make multi-columns work. Now, I use three divs that float to left, and which are manually filled with text. Please don't laugh i know its stupid! But I would wish to not to have to worry about the columns and just have a one piece of (un-interrupted) text which all goes into only 1 div, and then have a program smart enough to split it up into X equally wide columns. Question: before i start reinvent the wheel, what methods of programming power have you known that tackle this elegantly? Please suggest your best working multi-column layout sources so I can evaluate which option is the best (I will update the below table). Exploring all possibilities 2011 and further, to enable multi column text user experience: Language Author SourceCodeUsage WorksOnAllMajorBrowser? ================================================================================= html manual labour put text manually in separate left-floating divs "Y" // Upside: control! Downside: few changes necessitates to reflow 3 divs manually! CSS3 w3c css3.info/preview/multi-column-layout/ "N" // {-moz-column-count: 3; -webkit-column-count: 3; } Thats all! javascript a list apart will add url soon ? // php ? ? ? //

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Make an empty DIV height and width of its container

- by Olly F

My HTML currently contains a background image that stretches with the viewport. Within that, I plan to place a div that stretches to the height and width of the viewport and has black background colour at 50% opacity. I've set the div to be 100% width and height. The div is not stretching and I can't figure out why! HTML: <!DOCTYPE HTML> <html lang="en"> <head> <title>Tester</title> <meta charset="UTF-8"/> <style type="text/css"> html { background: url(http://cjpstudio.com/wp-content/uploads/2011/12/cityrock1.jpg) no-repeat center center fixed; -webkit-background-size: cover; -moz-background-size: cover; -o-background-size: cover; background-size: cover; } #background-color { width: 100%; height: 100%; background-color: #000000; } </style> </head> <body> <div id="background-color"> </div> </body>

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django join-like expansion of queryset

- by jimbob

I have a list of Persons each which have multiple fields that I usually filter what's upon, using the object_list generic view. Each person can have multiple Comments attached to them, each with a datetime and a text string. What I ultimately want to do is have the option to filter comments based on dates. class Person(models.Model): name = models.CharField("Name", max_length=30) ## has ~30 other fields, usually filtered on as well class Comment(models.Model): date = models.DateTimeField() person = models.ForeignKey(Person) comment = models.TextField("Comment Text", max_length=1023) What I want to do is get a queryset like Person.objects.filter(comment__date__gt=date(2011,1,1)).order_by('comment__date') send that queryset to object_list and be able to only see the comments ordered by date with only so many objects on a page. E.g., if "Person A" has comments 12/3/11, 1/2/11, 1/5/11, "Person B" has no comments, and person C has a comment on 1/3, I would see: "Person A", 1/2 - comment "Person C", 1/3 - comment "Person A", 1/5 - comment I would strongly prefer not to have to switch to filtering based on Comments.objects.filter(), as that would make me have to largely repeat large sections of code in the both the view and template. Right now if I tried executing the following command, I will get a queryset returning (PersonA, PersonC, PersonA), but if I try rendering that in a template each persons comment_set will contain all their comments even if they aren't in the date range. Ideally they're would be some sort of functionality where I could expand out a Person queryset's comment_set into a larger queryset that can be sorted and ordered based on the comment and put into a object_list generic view. This normally is fairly simple to do in SQL with a JOIN, but I don't want to abandon the ORM, which I use everywhere else.

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datatables add combobox as a column

- by user403295

Hi to all, I have got a datatable (http://www.datatables.net/). I have created and filled the table as shown below. Now I need to implement a combobox (assume that I have got 2010, 2011,2012) to allow the user select a year . then when user clicks View or Modify link, which is placed in the table, selected year will be passed to another page as a parameter. Now how can I turn my year column into a combobox?Thanks. rulesTableGlobal = $('#rulesTable').dataTable( { //"bJQueryUI": true, "sPaginationType": "full_numbers", "aoColumns": [ { "sTitle": "Id", "sWidth" : "20px" }, { "sTitle": "Property ID" , "sWidth" : "20px"}, { "sTitle": "Adress" , "sWidth" : "130px"}, { "sTitle": "Suburb" , "sWidth" : "50px"}, { "sTitle": "Bond", "sWidth" : "25px" }, { "sTitle": "Year", "sWidth" : "25px" , "aType": "dom-select"}, { "sTitle": "View or Modify" , "sWidth" : "50px"}] }); function addPropertyToTable( lt_id, lt_uid, address, suburb_name, min_guests, max_guests, bondFee,cleaningFee,bookingServiceFee, weekly_rate,nightly_rate){ var _lt_id = "\'" + lt_id + "\'"; var viewLink = '<A href="#" onclick="forwardDetails('+_lt_id+');">View and Modify</A>'; var year= ""; $('#rulesTable').dataTable().fnAddData( [ lt_id, lt_uid, address, suburb_name, bondFee,cleaningFee,bookingServiceFee, weekly_rate,nightly_rate, min_guests, max_guests, year, viewLink ] ); } }); }

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How to restrict date range of a jquery datepicker by giving two dates?

- by Harie

I am having two dates that is stored in db and am selecting it using $.ajax() and what i need is to show the datepicker values between the dates I selected from db. Here is my code for it.But it is not working properly function setDatePickerSettings(isFisc) { var fSDate, fEDate; $.ajax({ type: "POST", url: '../Asset/Handlers/AjaxGetData.ashx?fisc=1', success: function(data) { alert(data); var res = data.split("--");//data will be 4/4/2010 12:00:00--5/4/2011 12:00:00 var sDate = res[0].split(getSeparator(res[0])); alert("Separator " + getSeparator(res[1]) + " Starts " + sDate); var eDate = res[1].split(getSeparator(res[1])); alert("End " + eDate); alert("sub " + sDate[0]); fSDate = new Date(sDate[2].substring(0, 4), sDate[0], sDate[1]); alert("Starts " + fSDate.substring(0, 4)); fEDate = new Date(eDate[2].substring(0, 4), eDate[0], eDate[1]); alert("eND " + fEDate.toString()); } }); var dtSettings = { changeMonth: true, changeYear: true, showOn: 'both', buttonImage: clientURL + 'images/calendar.png', buttonImageOnly: true, showStatus: true, showOtherMonths: false, dateFormat: 'dd/mm/yy', minDate:fSDate, //assigning startdate maxDate:fEDate //assigning enddate }; return dtSettings; } Pls provide some solution. I need the datetime picker which requires values between that range. Thanks in advance

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javascript :Object doesn't support this property or method

- by Kaushik

In my jsp page, I have in the tag, the following code: <script type="text/javascript" src="<%=request.getContextPath()%>/static/js/common/common.js"></script> <script type="text/javascript"> // Function for Suppressing the JS Error function silentErrorHandler() {return true;} window.onerror=silentErrorHandler; </script> If there is some javascript executing on the jsp page after this, then I guess silentErrorHandler() will have no effect. i.e. the error will still show on page. IS this correct? Because the error is showing and am not sure why. The second part of the question is this: The error is Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; AskTbFXTV5/5.9.1.14019) Timestamp: Fri, 7 Jan 2011 21:26:23 UTC Message: Object doesn't support this property or method Line: 613 Char: 1 Code: 0 URI: http://localhost:9080/Claris/static/js/common/common.js And finally, line 613 states document.captureEvents(Event.MOUSEUP); There is error on IE8. Runs fine on Mozilla and IE7. Any suggestions will be very helpful

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What should I do from here?

- by Sunscreen

Hi all, First of all, the site rocks. You can ask and get specific answers, mainly, for programming issues. This question is more generic. I studied Physics for my bachelors and Digital Image Processing for my masters, ended on September 2001. From then on I started working as a developer and software analyst. I worked, and working, witn C, C++, AIX OS, XP OS, MFC 4.21. I also did some data translations from EDIFACT to XML and viceversa. I trained users for the applications that I was running, I created documents (detailed design docs mainly), though most of the time I wrote, and I still write, code. Recently I applied for the best greek, graduate university for my MBA and they accepted me, starting on Jan 2011. I am a developer with no specific insight with the languages I work. I can be very productive with some subsets of the languages that the companies I worked for use, though this is a limited thing for a developer. If I get my MBA I can be a semi-businees analyst ot consultant, as I am now a semi-developer. The problem is that I can do some but not all in a designated working area. What should I do from here? Should I get my MBA and look forswitching industries? Should I read and excersise myself with new languages and frameworks? Should I be more focussed to the deligations from my current job (currently I work with MFC)? Just for the note, I am 32 and I feel I am wasting my time. I am not getting the best that I can get from is current position (and I work here for 3+ years). Thanks all, Sun

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