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• Java Thread Management and Application Flow

  - by user119179

  I have a Java application that downloads information (Entities) from our server. I use a Download thread to download the data. The flow of the download process is as follows: Log in - The user entity is downloaded Based on the User Entity, download a 'Community' entities List and Display in drop down Based on Community drop down selection, Download and show 'Org Tree' in a JTree Based on Node selection, download Category entities and display in drop down Based on Category selection, download Sub Category entities and display in drop down Based on Sub Category selection download a large data set and save it The download occurs in a thread so the GUI does not 'freeze'. It also allows me to update a Progress Bar. I need help with managing this process. The main problem is when I download entity data I have to find a way to wait for the thread to finish before attempting to get the entity and move to the next step in the app flow. So far I have used a modal dialog to control flow. I start the thread, pop up a modal and then dispose of the modal when the thread is finished. The modal/thread are Observer/Observable the thread does a set changed when it is finished and the dialog disposes. Displaying a modal effectively stops the flow of the application so it can wait for the download to finish. I also tried just moving all the work flow to Observers. All relevant GUI in the process are Observers. Each update method waits for the download to finish and then calls the next piece of GUI which does its own downloading. So far I found these two methods produce code that is hard to follow. I would like to 'centralize' this work flow so other developers are not pulling out their hair when they try to follow it. My Question is: Do you have any suggestions/examples where a work flow such as this can be managed in a way that produces code that is easy to follow? I know 'easy' is a relative term and I know my both my options already work but I would like to get some ideas from other coders while I still have time to change it. Thank you very much.

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• Monitoring Maximum Process Network Activity

  - by user125973

  We have a collocated server on which we run some OpenVZ hosts. Recently, we have had to pay a lot extra we keep exceeding our bandwidth quota. Our quota is 5 Mb/s but we have spike to almost 50. I looked at the graphs and there are some spikes happening at some intervals. I want to know which process is causing this so I need a tool that monitors the processes and gives me the one with the maximum instant traffic (It doesn't matter how much traffic we have as long as we don't exceed the 5Mb/s quota). Does anyone have a recommendation for this? My hosts are CentOS 5 with OpenVZ so I can see all the containter processes from the host, if that helps in any way.

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• Best practice stock management when payment of customer failed using SQL Server and ASP.NET

  - by Martijn B

  Hi there, I am currently building a webshop for my own where I want to increment the product-stock when the user fails to complete payment within 10 minutes after the customer placed the order. I want to gather information from this thread to make a design decision. I am using SQL Server 2008 and ASP.NET 3.5. Should I use a SQL Server Job who intervals check the orders which are not payed yet or are there better solutions to do this. Thanks in advance! Martijn

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• Stock management of assemblies and its sub parts

  - by The Disintegrator

  I have to track the stock of individual parts and kits (assemblies) and can't find a satisfactory way of doing this. Sample bogus and hyper simplified database: Table prod: prodID 1 prodName Flux capacitor prodCost 900 prodPrice 1350 (900*1.5) prodStock 3 - prodID 2 prodName Mr Fusion prodCost 300 prodPrice 600 (300*2) prodStock 2 - prodID 3 prodName Time travel kit prodCost 1650 (1350+300) prodPrice 2145 (1650*1.3) prodStock 2 Table rels relID 1 relSrc 1 (Flux capacitor) relType 4 (is a subpart of) relDst 3 (Time travel kit) - relID 2 relSrc 2 (Mr Fusion) relType 4 (is a subpart of) relDst 3 (Time travel kit) prodPrice: it's calculated based on the cost but not in a linear way. In this example for costs of 500 or less, the markup is a 200%. For costs of 500-1000 the markup is 150%. For costs of 1000+ the markup is 130% That's why the time travel kit is much cheaper than the individual parts prodStock: here is my problem. I can sell kits or the individual parts, So the stock of the kits is virtual. The problem when I buy: Some providers sell me the Time Travel kit as a whole (with one barcode) and some sells me the individual parts (with a different barcode) So when I load the stock I don't know how to impute it. The problem when I sell: If I only sell kits, calculate the stock would be easy: "I have 3 Flux capacitors and 2 Mr Fusions, so I have 2 Time travel kits and a Flux Capacitor" But I can sell Kits or individual parts. So, I have to track the stock of the individual parts and the possible kits at the same time (and I have to compensate for the sell price) Probably this is really simple, but I can't see a simple solution. Resuming: I have to find a way of tracking the stock and the database/program is the one who has to do it (I cant ask the clerk to correct the stock) I'm using php+MySql. But this is more a logical problem than a programing one

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• Yet another "can't connect to MySQL over the network" question - but i seriously tried everything

  - by mireille raad

  Hello, I was left with the easy task of installing moodle. I am VPNing to 2 servers, one for the database and the other apache/php server 1 must connect over LAN to the mySQL db on server 2 I added a user with following priveleges : +---------------+------------+ | host | user | +---------------+------------+ | % | mir | | 10.10.40.15 | mir | | x.x.x.x | mir | | localhost | mir | Disabled firewall temporary made sure that my username/password combinations are correct, flushed priveleges, restarted mysqld i wnt to /etc/my.cnf .. if i try to add the port=3306 bind-address=10.10.40.15 or anything that is different from 0.0.0.0 or 127.0.0.1 - mysql wouldn't restart i read and tried many forums and pages and asked friends for tips but nothing works So my question to you : are there any networking extensions that need to be installed for mysql, how do i know nothing is missing from the installation any troubleshooting tips, any idea how to fix this, any step by step check list, am i missing something simple/stupid, please anything that comes to mind, let me know Appreciate your feedback on this friday night stuck at work :P

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• Can't perform ODBC connection to MySQL server on local network

  - by Emmanuel

  I have a wamp server running on LAN ip address 192.168.1.101 . From the browser on my PC which is on the LAN I can access the webserver and have as well set the phpmyadmin.conf file to be able to access the phpmyadmin interface. This works smoothly. On the wamp server I have a database which I'd need to access from any PC on the LAN using the MySQL Connector/ODBC. The problem is that I do not manage to setup the connection correctly. Here are the paramenters I use: Data Source Name: test_connection Description: test conenction Server: 192.168.1.101 Port: 3306 User: root Password: Database: The error message I get is the following: Connection Failed: [HY000][MySQL][ODBC 5.1 Driver]Can's connect to MySql server on '192.168.1.101' (10060) Would anybody have a hint to set up correctly the connection?

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• Network Printers

  - by Jack

  We have a sever that shares all the printers. The PC's that are running on XP professional get a error message quoting (Connect to Printer). The only way I can find to get around the problem is by restating the printer and as soon is it comes online you can then add it but you have not got long. do you think it could be anything to-do with updates on the sever? the sever system is running Windows Server 2003 any help would be much appreciated. Thanks

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• How do I install Redhat Enterprise Linux 5 on PPC from the network

  - by Dave Roger

  I want to be able to install rhel5 on ppc using yaboot the same as PXE for other platforms. How do I do it?

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• OS specific network delay, why?

  - by Atilla Filiz

  Since my new ISP installed their own router to my house(I rented a room in a student house so don't have much control on these), I started having strange delays. Any outgoing connection I do, be it http or ssh, is delayed for several seconds, and once it is established, I have no further problems. I open several simultaneous tabs in my browser and after about 5 to 8 seconds, they all connect and load simultaneously and quiet fast. I can actually play online games once I connect.What's more interesting is, I experience this only with Linux distros, namely Arch and some versions of Ubuntu. Access with Windows installs are quiet normal. What might be wrong with my router? Everything was fine with my old router but I have to use this one now.

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• AIX network parameters to close TCP sockets of unplugged devices

  - by ADD Geek

  Hi there We have an AIX box, running what we call in banking "ATM Switch" not the ATM networking switch, but the bank ATM driver. where we have some ATM machines connected to two server processes. The problem is, when we disconnect any of these machines, the netstat -na| grep <port number> command shows that the socket established for this disconnected device is still established, we have to manually send a command from the software to make the socket aware that it is not live anymore. Is there a parameter on tcp level to make this connection aware within a minute or two that this device is not connected anymore? we had the following parameters set with root privileges: no -o tcp_keepidle=1000 no -o tcp_keepcnt=2 no -o tcp_keepintvl=150 no -o tcp_finwait2=100 it was originally having the default values. but even after we changed these parameters and restarted the server processes, the problem was still there.

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• Cannot connect to xdebug over virtual network - Vagrant Virtualbox

  - by smix96

  I'm trying to set up a development box using Virtualbox / Vagrant / Puppet with the intention of eventually provisioning all my machines up to production. However this is stopping me going forward at the moment. I've installed ubuntu lucid over windows 7. When trying to connect to xdebug by starting a debugging session in eclipse, it hangs at 57% (common in eclipse when it cannot communicate with xdebug). Here is my xdebug.ini and the settings here are appearing in phpinfo(). xdebug.remote_enable=On xdebug.remote_handler=dbgp xdebug.remote_host=192.168.56.1 xdebug.remote_port=9000 I'm now wondering if it's an issue with port forwarding? If eclipse is looking on port 9000, will it find port 9000 on a virtual machine? Any help would be greatly appreciated!

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• Federated access to desktop and network resources in MS AD domains

  - by Glenn Stauffer

  We are looking for a way to provide members of three loosely connected organizations with access to authenticated resources such as file shares, printers, and lab computers. I've seen federation facilities for web resources; is ther something similar for domain logins? Our Active directory domains are not connected so we would have to use email addresses for the username to insure uniqueness. Is there any openid like mechanism that works for AD logins?

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• App to log network user's file activities

  - by Luke

  My employer recently purchased a Mac Pro server (2011 model) and we've installed OSX Lion Server from the Mac Appstore. I'm definitely no server admin, but I have been tasked with finding out the following: Can we monitor or log what users do? (ie, open a file, copy a file.... or file-related tasks) Can we stop files from being copied? Or be alerted when this does occur? Thanks in advance for any assistance.

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• One network, two macbooks, one is fast and the other is slow

  - by Brendan

  I really need help for my friend. I know next to nothing about computers. My roommate and I both have macbook pros from the same year running OS X, are both connecting wirelessly to the same xfinity wifi, and while mine runs perfectly fine, my roommate complains that his works very slowly and times out every few seconds. I can't seem to figure out why this is. He is trying to get me to switch internet providers because he is convinced that it is their problem, but this cannot possibly be the issue since it works great on mine. He has an xbox hooked up to the wifi that he says also works poorly. I really can't see switching providers given that I am experiencing absolutely zero problems. How can I help my friend?

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• Very long DNS lookups inside my network

  - by Nuno Cordeiro

  Ever since I installed DD-WRT (v24-sp2 08/07/10 std-usb-ftp) on my router (RT-N16), my browsing got substantially slower. Using FirePHP I figured out that it's being caused by VERY long DNS lookups (~30 seconds). When the domain name was very recently accessed then speed is very good. I tried changing DNS on the computer and I tried messing around with the options on DD-WRT. I have tried to configure the router with Google DNS and/or OpenDNS. My current DNS output after using ipconfig -all is: 192.168.1.1 208.67.220.220 8.8.8.8 208.67.222.222 Can someone help me debug and solve this problem? I'd like to snoop the requests themselves. How can I know which DNS requests are being sent and which are failing/succeeding? Note: I don't expect this to be relevant but my router is connected to the internet through an ONT.

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• Wireless mouse keeps freezing when using whole network bandwidth

  - by Ümit AKKAYA

  Hi i have wireless mouse and keyboard connected to pc with USB receiver. When i downloading something without limiting download speed, mouse and keyboard keep freezing randomly. Mouse : Microsoft Wireless Mouse 5000 Keyboard : Microsoft keyboard 3000 v2 Chipset : Intel HM65 Processor : Intel Core i7 2670QM @ 2200MHz Physical Memory : 8192MB (2 x 4096 DDR3-SDRAM) OS : Win 7 x64 Note : The solution described in http://superuser.com/a/309622/157168 not helped.

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• trying to connect to non-standard port over esxi guest network

  - by user52874

  I've got an exsi 5.5 box that has a redhat 6.5 guest and a win7 guest. The guest nics are connected on a vsphere standard switch. There is no connection from the vswitch to an outside physical nic. I can ping between the two boxes, each way. I can successfully psping redhat:22 from the win7 box. I can successfully tcping win7:139 from the redhat box. All firewalls are down on both boxes. I cannot connect from the win7 box to redhat:8003, either via psping redhat:8003, nor telnet redhat 8003, nor by the application client itself. sudo netstat -patn | grep 8003 on the redhat box shows that it's listening on 0.0.0.0. Any thoughts? suggestions?

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• Get IP network range after reverse DNS?

  - by Max

  For analytics purposes, I'm looking at large sets of IP addresses in server log files. I'm trying to perform reverse-DNS lookups to understand where traffic is coming from - e.g. what percentage of IPs resolve to corporations, schools, government, international etc. Despite a bunch of optimizations, individually reverse-DNS'ing every IP address still appears to be fairly expensive though. So - is there any way to obtain an entire range of IPs from a reverse-DNS? If yes, this could greatly reduce the number of actual reverse-DNS lookups. Example (numbers slightly obfuscated): Log file contains a request from an IP 128.151.162.17 Reverse DNS resolves to 11.142.152.128.in-addr.arpa 21599 IN PTR alamo.ceas.rochester.edu (So this is a visitor from Rochester University, rochester.edu) Now, would it be safe to assume that all at least all IPs from 128.151.162.* will also resolve to rochester.edu? What about 128.151.*.*? Is there a way to get the exact IP range?

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• General-purpose unix-based network authentication tool?

  - by Patrick Collison

  I want something that'll integrate auth across SSH, web (ideally including SSL, with the option of authenticating with either client-side cert or password, like they do at MIT), and whatever applications want to use it. Kerberos seems to best fit what I want, but tool support seems surprisingly poor. What do people use these days?

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• Problems installing sql management studio express on win7-64

  - by P a u l

  Here's what happened: install sql express 2008 install sql 2008 sp1 download and install SSMSE x64. There is a popup re incompatibility with the OS, and the help takes you back to the sp1 download page. It won't install... in fact the install that comes up appears to be for sql server express and I see no mention of SSMSE anywhere in the tangle of dialogs. There appears to be no version of SSMSE for Win7-64 at this time. Do you know any way to fix this?

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• Bad network performance on KVM guest

  - by Devator

  I have a dedicated server connected to a 1000 Mbit port. However, the Debian guest is only getting half to a 1/4 the speeds: On the node itself (Linux node 2.6.32-279.9.1.el6.x86_64 #1 SMP Tue Sep 25 21:43:11 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux): wget http://www.bbned.nl/scripts/speedtest/download/file1000mb.bin -O /dev/null --2012-11-11 23:10:11-- http://www.bbned.nl/scripts/speedtest/download/file1000mb.bin Resolving www.bbned.nl... 62.177.144.181 Connecting to www.bbned.nl|62.177.144.181|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 1048576000 (1000M) [application/octet-stream] Saving to: â/dev/nullâ 100%[====================================>] 1,048,576,000 100M/s in 10s 2012-11-11 23:10:21 (100 MB/s) - â/dev/nullâ On the guest (Debian 6.0.5, x64: Linux debian 2.6.32-5-amd64 #1 SMP Sun Sep 23 10:07:46 UTC 2012 x86_64 GNU/Linux): wget http://www.bbned.nl/scripts/speedtest/download/file1000mb.bin -O /dev/null --2012-11-11 23:10:41-- http://www.bbned.nl/scripts/speedtest/download/file1000mb.bin Resolving www.bbned.nl... 62.177.144.181 Connecting to www.bbned.nl|62.177.144.181|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 1048576000 (1000M) [application/octet-stream] Saving to: â/dev/nullâ 100%[=================================================================================================================================================================================================>] 1,048,576,000 16.5M/s in 42s 2012-11-11 23:11:23 (23.8 MB/s) - â/dev/nullâ I use the virtio NIC. I tried some more NICs: e1000 and the Realtek 8139 but those yield even worse results. Anyone has an idea how to improve these speeds?

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• OpenGL/Carbon/Cocoa Memory Management Autorelease issue

  - by Stephen Furlani

  Hoooboy, I've got another doozy of a memory problem. I'm creating a Carbon (AGL) Window, in C++ and it's telling me that I'm autorelease-ing it without a pool in place. uh... what? I thought Carbon existed outside of the NSAutoreleasePool... When I call glEnable(GL_TEXTURE_2D) to do some stuff, it gives me a EXC_BAD_ACCESS warning - but if the AGL Window is never getting release'd, then shouldn't it exist? Setting set objc-non-blocking-mode at (gdb) doesn't make the problem go away. So I guess my question is WHAT IS UP WITH CARBON/COCOA/NSAutoreleasePool? And... are there any resources for Objective-C++? Because crap like this keeps happening to me. Thanks, -Stephen --- CODE --- Test Draw Function void Channel::frameDraw( const uint32_t frameID) { eq::Channel::frameDraw( frameID ); getWindow()->makeCurrent(false); glEnable(GL_TEXTURE_2D); // Throws Error Here } Make Current (Equalizer API from Eyescale) void Window::makeCurrent( const bool useCache ) const { if( useCache && getPipe()->isCurrent( this )) return; _osWindow->makeCurrent(); } void AGLWindow::makeCurrent() const { aglSetCurrentContext( _aglContext ); AGLWindowIF::makeCurrent(); if( _aglContext ) { EQ_GL_ERROR( "After aglSetCurrentContext" ); } } _aglContext is a valid memory location (i.e. not NULL) when I step through. -S!

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• Is there anything better than Microsoft Project? [closed]

  - by GuruAbyss

  Possible Duplicate: Project Planning Tools I'll soon be knee-deep into a very large project and I'm looking into project management software. I need users opinions on software based (no web based) solutions that are equal or better than MS Project. It can be open source or closed source. Thank you all in advanced for your insight and opinions!

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• Managing MS SQL Server 2005/8 with third-party tools

  - by Craig

  I am trying to access a SQL Server database housed on a ISP. Normally one would simply install an express version of SQL server and use the Management Studio therein. Yeah, not me! Are there any third party tools that will allow me to manage my database? Lightweight ones would be the best but I'm not that picky. :)

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• IIS 401.3 - Unauthorized on only 1 server out of 3 set up for network load balancing

  - by Tony

  Over the weekend our Server Admin set up two virtual Windows 2008 machines with IIS installed and set them up under NLB. I came in and changed the application pool the website was running under to our domain account that has proper access to the database and the file share hosting our .NET web application Sitefinity, and changed it to .NET 4 Integrated. NLB and everything was running fine on both servers. He brought up the third server for our cluster on Tuesday and I performed the same actions.. The only difference was that I was given admin rights for the third server so I could set it up remotely instead of going to his office. He has full control over the share and NTFS perms on \\hostname\Sitefinity and I believe I only had read access. I pointed the web site to the same \\hostname\Sitefinity\sitename share that the others were on and the authentication/authorization test settings passed. I hit the site from http://localhost (like I did successfully from the other two before trying the cluster's IP address) and I received a HTTP Error 401.3 - Unauthorized. I've verified many times that the application pool is running under the same service account. I tried hitting just a simple test.htm.. works fine on both of the first two servers but I get the same 401.3 on the third. I copied my dev project to the local inetpub directory and re-pointed the website and that ran perfectly. I turned on Failed Request Tracing and it acts like it's still running the local IUSR account I guess (instead of my domain account)? Here is an excerpt of the File Cache Access Start and the error from the trace: FileName \\hostname\sitefinity\sitename\test.htm UserName IUSR DomainName NT AUTHORITY ---------- Successful false FileFromCache false FileAddedToCache false FileDirmoned true LastModCheckErrorIgnored true ErrorCode 2147942405 LastModifiedTime ErrorCode Access is denied. (0x80070005) ---------- ModuleName IIS Web Core Notification 2 HttpStatus 401 HttpReason Unauthorized HttpSubStatus 3 ErrorCode 2147942405 ConfigExceptionInfo Notification AUTHENTICATE_REQUEST ErrorCode Access is denied. (0x80070005) ---------- My personal AD account was then granted read/write perms to the share so I created a new application pool and set the site under it in case there was an issue with the application pool but no success. I created another under my own account and it still failed. It just seems like maybe it's not trying to access the files under the account my application pools are running under although that's the only way I've done things before. I set the Physicial Path Credentials in Advanced Settings on the site to the service account and it threw a 500 error of some sort so I assume that's not the answer (and I don't have to do it on the other servers). It's like somehow I'm trying to force impersonation on the IUSR account or something?

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