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  • Design guidelines for cache mechanism

    - by Delashmate
    Hi All, I got assignment to write design for cache mechanism (this is work assignment, not homework), This is my first time writing a design document, Our program display images for doctors, and we want to reduce the parsing time of the images So we want to save the parsed data in advance (in files or inside database) Currently I have several design key ideas: Handle locks - each shared data structure should be handled, also files Test - add test to verify the data from the cache is equal to the data from the files To decouple the connection to the database- not to call directly to the database Cleanup mechanisem- to delete old files if the cahce directory exceed configurable threshold Support config file Support performance tool in the feature I will also add class diagram, data flow charts, and workflow What do you think I should add to the key ideas? Do you know good link to atricales about design? Thanks in advance, Dan

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  • Query to update rowNum

    - by BrokeMyLegBiking
    Can anyone help me write this query more efficiently? I have a table that captures TCP traffic, and I'd like to update a column called RowNumForFlow which is simly the sequential number of the IP packet in that flow. The code below works fine, but it is slow. declare @FlowID int declare @LastRowNumInFlow int declare @counter1 int set @counter1 = 0 while (@counter1 < 1) BEGIN set @counter1 = @counter1 + 1 -- 1) select top 1 @FlowID = t.FlowID from Traffic t where t.RowNumInFlow is null if (@FlowID is null) break -- 2) set @LastRowNumInFlow = null select top 1 @LastRowNumInFlow = RowNumInFlow from Traffic where FlowID=@FlowID and RowNumInFlow is not null order by ID desc if @LastRowNumInFlow is null set @LastRowNumInFlow = 1 else set @LastRowNumInFlow = @LastRowNumInFlow + 1 update Traffic set RowNumInFlow = @LastRowNumInFlow where ID = (select top 1 ID from Traffic where flowid = @FlowID and RowNumInFlow is null) END Example table values after query has run: ID FlowID RowNumInFlow 448923 44 1 448924 44 2 448988 44 3 448989 44 4 448990 44 5 448991 44 6 448992 44 7 448993 44 8 448995 44 9 448996 44 10 449065 44 11 449063 45 1 449170 45 2 449171 45 3 449172 45 4 449187 45 5

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  • HTML/JS/CSS issue getting bigger by itself

    - by Azzyh
    Here's the picture to begin with. I have this check box, that when you check, then with jQuery toggle(); it hides that you see in first half of the picture (#writeComment) and shows #SCtryVOTE (what you see in the other half picture, to the right). Now i dont know why but of some reason it expands when its checked, why i dont know, is it because it needs more place than it have or? how do i make this work without having problems when its checked. Here's coding: $('#tryout').click(function () { $('#writeComment').toggle(!$(this).attr('checked')); $('#SCtryVOTE').toggle($(this).attr('checked')); }); the js jquery script part, heres the table and divs HTML part: <input type="checkbox" id="tryout"> <table align="center" width="400" cellpadding="0" cellspacing="1" id="theBoxer"> <tr style="background: #686868;"> <td align="center" valign="top" width="70" height="25" style="border:1px #FFF solid;">Opret</td> <td align="center" valign="top" width="70" height="25" style="border:1px #FFF solid;">Opret</td> </td> </tr> <tr> <td align="left" valign="top" width="70" height="112" style=""> TEST </td> <td align="left" valign="top" width="70" height="112" style=""> <div id="writeComment"> Smid en kommentar:<br> <form action="javascript:DoInsert()" method="post"> <textarea id="kommentar" name="kommentar"></textarea><br /> <input type="hidden" name="fID" id="fID" value="<? echo $_GET["id"]; ?>"> <input type="submit" name="Submit" value="Sæt ind!"> </form> </div> <div id="SCtryVOTE" style="display: none;"> <form onsubmit="if (!this.comment.cleared) clearContents( document.getElementById('comment') ); return true;" action="javascript:DoSCInsert()" method="post"> <textarea onfocus=" javascript:clearContents(this); this.cleared=true;" rows="5" cols="40" id="comment" name="comment" <?php if($vis["username"] == $pusername) { echo "DISABLED"; } ?>>Tryk for at skrive. Skal være detaljeret og grundet.</textarea> <br>Ja: <input type="radio" value="Y" id="SCvoteY" name="vote"></input> Nej: <input type="radio" id="SCvoteN" value="N" name="vote"> </input> <input type="submit" id="SCstem" name="Submit" value="Stem!"> </form> </div> Maybe you need the CSS part too for these two boxes: #writeComment{ position: relative; left: 5px; top: 10px; } #SCtryVOTE{ position: relative; left: 5px; top: 10px; }

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  • nat with iptables, re-connecting fail within about 3 minutes

    - by xpu
    i constructed a nat with iptables, as following: echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -I PREROUTING -p tcp --dport 9000 -j DNAT --to xx.xx.xx.xx iptables -t nat -I POSTROUTING -p tcp --dport 9000 -j MASQUERADE service iptables save service iptables restart the configuration worked fine, but there was a problem when i disconnected and tried to reconnect again, connection will be refused within about 2~3 minutes, after that, things go fine again. what was the problem? how do i make it to accept new connection after the old one break?

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  • Connection: Keep-Alive and PHP sessions not working

    - by user366667
    We have a VB application that needs to run an specific flow on a PHP page. This application was correctly catching the PHPSESSID cookie and using it for all subsequent requests. However, PHP wasn't able to restore any changes made on $_SESSION variable. The variable was changed, saved, and on the next request it was restored as an empty array. We found out that changing the Connection header from "Keep-Alive" to "Close" fixed the issue. I couldn't find anything on the web saying that PHP sessions shouldn't be restored under Keep-Alive connections. Does anyone know why this was happening? PS: We didn't find anything weird or different on Apache, ModSecurity or PHP configuration settings.

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  • `for` loop of Microsoft `cmd`: how can I process only the files with a certain extension?

    - by uvts_cvs
    I have a the folder c:\test\ and two files in it a.txt and b.txtv. I would like to process just the files with extension equal to .txt. If I write this commands cd c:\test for %f in (*.txt) do echo %f I will get the result where both a.txt and b.txtv are listed. The same happens with cd c:\test dir *.txt It seems .txt is the same of .txtv. I have Windows XP SP3 in Italian and the result of ver is Microsoft Windows XP [Versione 5.1.2600]. The same result is from Windows 7 in English Microsoft Windows XP [Version 6.1.7601].

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  • Crontab + .sh + php

    - by Kristaps Karlsons
    Hi. I'm trying to call a shell script every 5 minutes, witch executes php file under root. # crontab -l */5 * * * * /home/regularuser/call.sh permissions: -rw-rw-rw- 1 root root 162 Jun 6 23:40 call.php -rwxr-xr-x 1 root root 66 Jun 7 01:20 call.sh call.sh contents: #!/bin/bash php -q /home/regularuser/call.php echo "request processed" My problem is that my php file doesn't get executed via crontab. However, if I call call.sh - everything works perfectly. I'm new to crontab and shell scripting, so any advice/resources are welcome.

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  • Which is the best Linux C/C++ debugger (or front-end to gdb) to help teaching programming?

    - by omer.gimenez
    I teach a sort of "lite" C++ programming course to novices ("lite" meaning no pointers, no classes, just plain old C, plus references and STL string and vectors). Students have no previous experience in programming, so I believe that using an interactive debugger would help them understand program flow, variables, and recursion. The course is taught in Linux. Teaching them to use gdb is just overkill (they will not use nor understand most features). I just need something simple but easy to use: to see at which line the program is now, what is in the stack (local variables, previous calls, etc.). I look something similar to old Turbo Pascal or Turbo C++ Borland's debugger, or Visual Studio debugger. Thank you,

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  • What's the most effective path to top level development?

    - by Glycerine
    I got a questions asked from one of my delegates the other day, "how did you get to where you are in programming?" I'm now at a java application realm - and I'm just about OK at it. the path that brought me there: BASIC VB6 PHP javascript actionscript java/objective-C I still live in the web development but I now prefer java - I see this as a good flow but I was wondering how you guys got to where you are and the best path to take? Edit: reword I guess I've asked the question wrong - I was wondering how to progress to a top level application from starting off in development. Where good paradyms connect languages. I won't have considered C++ as my first language see.

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  • Adding to database. No repeat on refresh

    - by kevstarlive
    I have this code: Episode.php <?$feedback = new feedback; $articles = $feedback->fetch_all(); if (isset($_POST['name'], $_POST['post'])) { $cast = $_GET['id']; $name = $_POST['name']; $email = $_POST['email']; $post = nl2br ($_POST['post']); $ipaddress = $_SERVER['REMOTE_ADDR']; if (empty($name) or empty($post)) { $error = 'All Fields Are Required!'; }else{ $query = $pdo->prepare('INSERT INTO comments (cast, name, email, post, ipaddress) VALUES(?, ?, ?, ?, ?)'); $query->bindValue(1, $cast); $query->bindValue(2, $name); $query->bindValue(3, $email); $query->bindValue(4, $post); $query->bindValue(5, $ipaddress); $query->execute(); } }?> <div align="center"> <strong>Give us your feedback?</strong><br /><br /> <?php if (isset($error)) { ?> <small style="color:#aa0000;"><?php echo $error; ?></small><br /><br /> <?php } ?> <form action="episode.php?id=<?php echo $data['cast_id']; ?>" method="post" autocomplete="off" enctype="multipart/form-data"> <input type="text" name="name" placeholder="Name" /> / <input type="text" name="email" placeholder="Email" /><small style="color:#aa0000;">*</small><br /><br /> <textarea rows="10" cols="50" name="post" placeholder="Comment"></textarea><br /><br /> <input type="submit" onclick="myFunction()" value="Add Comment" /> <br /><br /> <small style="color:#aa0000;">* <b>Email will not be displayed publicly</b></small><br /> </form> </div> Include.php class feedback { public function fetch_all(){ global $pdo; $query = $pdo->prepare("SELECT * FROM comments"); $query->bindValue(1, $cast); $query->execute(); return $query->fetchAll(); } } This code updates to the database as it is suppose to. But after submission it reloads the current page as mentioned in the form action. But when I refresh the page to see the comment being added it asks to re submit. If I hit submit then the comment adds again. How can I stop this from happening? Maybe I could hide the comment box and display a thank you message but that would not stop a repeat entry. Please help. Thank you. Kev

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  • Binding a select box to a Collection (with Spring)

    - by WiPU
    i have the following problem. I have a form bean and in this bean is a list with objects. List<SomeObjectForm> toDisplay; Now i want map a html select to this list. Something like that: <form:select id="inputGroupFields" path="templateKey" multiple="true"... <form:select id="inputGroupFields" path="templateKey.id" multiple="true"... And this dosnt work of course. Now i have tryed to add different custom Converter like: myConv implements Converter<SomeObjectForm, String> myConv extends StringToObject And this also not work. I'm not sure if this is the right approach or there is a easier way to do that. Some addional Infos: --i'm using spring 3.0.5 --all this happens during a web flow regards and thanks, WiPu

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  • Copy any file with a specific file extension in subfolders into a folder

    - by Onyxius
    I found a script on here that would use 7zip and extract all the files in all the sub-folders of a specific folder and put them in their own folder using the script below. What I need is add to it or maybe use another script if i have to and specify where i want those files to go instead of putting them in their own folder within the folder. I don't know how to do this and hope someone would be able to help. Thanks for the help @echo on FOR /D /r %%F in ("*") DO ( pushd %CD% cd %%F FOR %%X in (*.rar *.zip *.tar) DO ( "C:\Program Files\7-zip\7z.exe" x -o"%%~nX" "%%X" ) popd )

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  • OOMK kills mysql and apache when there is still a lot[?] of mem

    - by Flyer
    let me first say that I'm pretty new ti *nix systems and even more to server management. Anyway, I've got a little problem. I got VPS with 1gb mem, system is debian 6. I have few sites running on it, though some load can only be caused by one of them. Recently, OOMK started to kill mysql, causing wp and phpbb giving error that it can't connect to mysql server. Error itself is not good, especially if it happens at night and site becomes unavailable until I wake up and restart mysql. I have probably bad line in my cron which can be cause of it all (again, I'm new to it) */20 * * * * sync; echo 3 > /proc/sys/vm/drop_caches Well, if you need any information, let me know, since I don't really know which information can be useful here. Also, I'd like to know if it's not too bad to have above cron task.

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  • How Do I Parse a String?

    - by Russ
    I am new to bash, and I am creating a script that loops through the files in a directory and based on part of the filename, does something with the file, so far I have this: #!/bin/bash DIR="/Users/me/Documents/import/*" for f in "$DIR" do $t=?????? echo "Loading $f int $t..." done so $f will output something like this: /Users/me/Documents/import/time_dim-1272037430173 out of this, I want time_dim, the directory can be variable length and -1272037430173 is a fixed length (it's the unix timestamp btw). What is the best way to go about this?

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  • How to use condition in a TestGen4Web script for a child popup window?

    - by GotoError
    I have TestGen4Web script for automating testing on a web-based user interface that has a popup window (hey i didn't write that ui..). In order to write a complete test script that branches the flow based on the some presence of some content in the popup window, I need to write a simple if condition that does something like if document.getElementById("xyz").value - that will run on the popup window and not the parent window. Any ideas on how to accomplish this? currently, the condition fails because it runs on the parent window. Also, how to extract some text from the dom and spit it out to a file at the end of the test?

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  • How do you plan for starting a new web system?

    - by Kerry
    I've been creating more and more systems recently and I find more and more planning and preparation I do before starting the project. I determine what libraries or frameworks I will be using, what languages, the basic architecture of how the site will flow, etc. I've also heard of other design processes such as hanging styrofoam balls to show where classes are and how they relate, which is a process I've never heard of nor do I know how it works. Is there any software that helps with this process? Are there any guidelines or steps or do you have a recommended set of steps or guidelines that you follow when designing a new project?

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  • Thread processing in EMS connection

    - by aladine
    I am setting up a client and exchange project and both are connecting to a remote server. Exchange will connect to the server by EMS connection. While client will connect by FIX. For the aim of building of black box testing, both client and exchange engine will be given some predefined testcases to send and receive to the server. I design the client engine with multithread processing to manipulate many testcases. Actually it is able to run succesfully. For exchange engine, I wonder that multi thread is applicable in the context that the exchange engine just need to publish a message when it received msg from subscribed topic on server. Flow of messages transmission: Client--SERVER--Exchange FIX EMS Exchange--SERVER--Client EMS FIX Thanks if you can help me on this issue.

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  • Best Online C++ Refresher

    - by Bill
    It's been a longtime since I've done any C++ (probably about 13 years, since I graduated college). I've developing in various others languages since then. My new gig uses a fair bit of C++. Any recommendations for getting bootstrapped? To clarify -- I don't need an "into to programming" book. E.g., what's a variable, flow control, etc. I understand the concepts of OO having implemented them, etc. I'm looking for the best way to get to the specifics of C++.

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  • Windows command FOR /F isn't working?

    - by Mark Ransom
    I'm trying to use the FOR command in Windows XP's command line. I have a file temp.txt with 3 lines: temp1 temp2 temp3 And I'm typing the following command at the prompt: for /F %p in (temp.txt) do echo Testing %p Nothing comes back. If I remove the /F parameter, the output is Testing temp.txt. As far as I can determine, I'm using the command exactly as it is documented by Microsoft. I've checked my registry to make sure Command Extensions are on, and even started a new shell with cmd /e:on to be doubly sure. What am I doing wrong? Yes, I was doing something wrong. The file temp.txt wasn't created from scratch, I just edited it to put in my test content. Unfortunately when I created the file the first time, I saved it with a UTF-8 marker at the front. Recreating the file as plain text solved the problem.

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  • How to display tab bar in UIViewController

    - by Akrambek
    I have created tabbar based project in MT and I have following flow in my storyboard; Tabbarcontroller -> 1) MainViewController -> CustomerViewController; 2) SettingViewController The problem I am having is that when I use PrepareForSegue function in CustomerViewController and pointing it to MainViewController. Tab Bar UI is missing from MainViewController. I know that if I point to TabBarController it is going to be fine. But I need to pass some data exactly to MainViewController. Is there any way to make it. I am new in iOS and monotouch. Any suggestion appreciate.

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  • Run a script as root from apache

    - by Lord Loh.
    I would like to update my hosts file and restart dnsmasq from a web interface (php/apache2). I tried playing around with suid bits (the demonstaration). I have both apache and dnsmasq running on an EC2 instance. I understand that Linux ignores the setuid bit on text scripts, but works on binary files. (Have I got something wrong?). I added exec("whoami"); to the example C program in Wikipedia. Although the effective UID of the C program is 0, whoami does not return root :-( I would thoroughly like to avoid echo password | sudo service dnsmasq restart or adding apache to the sudoers without password! Is there a way out? How does webmin do such things?

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  • PPTP VPN Server issue : server = centOS & client = windows 7

    - by jmassic
    I have a CentOS server configured as a PPTP VPN Server. The client is a Windows 7 with "Use default gateway on remote network" in advanced TCP/IPv4 properties enable. He can connect to CentOS without any problem and can access to: The Box of his ISP (http://192.168.1.254/) The CentOS server The website which is hosted by the server (through http://) But he canNOT access any other web service (google.com or 74.125.230.224) I am a beginner with web servers so I do not know what can cause this problem. Note 0 : The Windows 7 user must be able to access the whole internet through the CentOS PPTP proxy. Note 1 : With "Use default gateway on remote network" in advanced TCP/IPv4 UNCHECKED it is the same problem Note 2 : With "Use default gateway on remote network" in advanced TCP/IPv4 UNCHECKED AND "disable class based route addition" CHECKED the Win 7 can access google but with the ISP IP (no use of the VPN...) See Screenshot Note 3 : I have made a echo 1 > /proc/sys/net/ipv4/ip_forward and a iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

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  • How to NFSv4 share a ZFS file system on FreeBSD?

    - by Sandra
    Using FreeBSD 9, and created a ZFS file system like so zfs create tank/project1 zfs set sharenfs=on tank/project1 There are many howto's on setting up NFSv3 on FreeBSD on the net, but I can't find any one NFSv4 and when the NFS share is done with ZFS. E.g. this howto say I have to restart the (NFSv3) by nfsd -u -t -n 4, but I don't even have nfsd. When I do # echo /usr/ports/*/*nfs* /usr/ports/net-mgmt/nfsen /usr/ports/net/nfsshell /usr/ports/net/pcnfsd /usr/ports/net/unfs3 /usr/ports/sysutils/fusefs-chironfs /usr/ports/sysutils/fusefs-funionfs /usr/ports/sysutils/fusefs-unionfs # I don't see any NFSv4 servers, which I could install with pkg_add. Question How do I install and setup NFSv4, so I can mount the share from e.g. a Linux host?

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  • Why my USB mouse get suspended after 3 seconds of inactivity?

    - by Vi.
    Mouse's bottom LED goes off after 3 seconds after connection and cursor movements and wheel stops. Pressing any button, reconnecting or resetting USB device resumes it for another 3 seconds (when resumed by pressing button, this event does no go to X). This happens when using any of USB ports. This mouse works well with other computer with Linux. It was working well before. Why can it happen? How to fix it? Update: It happens only if laptop is on battery. Answer: this is caused by powersaving done by laptop-mode-tools. To temporary turn off powersaving one can use for i in /sys/bus/usb/devices/*/power/control; do echo on > $i; done

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  • Why can't I use %USERPROFILE% in %PATH%?

    - by Zano
    On my Windows 7 machine, using the System Properties Environment Variables tool, I try to add %USERPROFILE%\Bin to the system variable PATH. For some reason, that doesn't work, even though %SystemRoot%\system32 works fine. When I try to run commands from the console, files in my Bin folder are not found, even though files in the System32 folder are found. The only difference between UserProfile and SystemRoot that I can see is that the former is a user variable while the latter is a system variable. I i write echo %USERPROFILE%\Bin it yields c:\Users\zano, and if I add c:\Users\zano\Bin explicitly, everything work fine. What's the problem here?

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