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• Is an Ethernet point to point connection without a switch real time capable?

  - by funksoulbrother

  In automation and control, it is commonly stated that ethernet can't be used as a bus because it is not real time capable due to packet collisions. If important control packets collide, they often can't keep the hard real time conditions needed for control. But what if I have a single point to point connection with Ethernet, no switch in between? To be more precise, I have an FPGA board with a giga-Ethernet port that is connected directly to my control PC. I think the benefits of giga Ethernet over CAN or USB for a p2p connection are huge, especially for high sampling rates and lots of data generation on the FPGA board. Am I correct that with a point to point connection there can't be any packet collisions and therefore a real time environment is given even with ethernet? Thanks in advance! ~fsb

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• Difference between indoor and outdoor WiFi Access Points

  - by aaron-cook

  Does anyone know if there is an operational difference between what is classified as an 'indoor' wifi access point and an 'outdoor' wifi access point. I'm speaking specifically to its operation rather than things like whether its enclosure is weather proof or not. And I'm also referring to the access point itself as opposed to the antenna used.

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• outlook security alert after adding a second wireless access point to the network

  - by Mark

  Just added a Netgear WG103 Wireless Access Point in our conference room to allow visitors to access the internet through out internal network. When switched on visitors can connect to the intenet and everything works fine. Except, when the Access Point is switched on, normal users of the network get a Security Alert when they try to start Outlook 2007. The Security Alert is the same as the one shown in question 148526 asked by desiny back in June 2010 (http://serverfault.com/questions/148526/outlook-security-alert-following-exchange-2007-upgrade-to-sp2) rather than "autodiscover.ad.unc.edu" my security alert references our "Remote.server.org.uk". If I view the certificate it relates to "Netgear HTTPS:....", but the only Netgear equipment we have is the new Access Point installed in the conference room. If the Access Point is not switched on we do not get the Security Alert. At first I thought it was because we had selected "WPA-PSK & WPA2-PSK" Network Authentication Type but it continues to occur even if we opt for "Shared Key" WEP Data Encryption. I do not understand why adding a Netgear Wireless Access point would cause Outlook to issue a Security Alert when users try to read their email. Does anyone know what I have to do to get rid of the Security Alert? Thanks in advance for reading this and helping me out.

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• Set custom mount point and mount options for USB stick

  - by kayahr

  Hello, I have an USB stick which contains private stuff like the SSH key. I want to mount this stick to my own home directory with 0700 permissions. Currently I do this with this line in /etc/fstab: LABEL=KAYSTICK /home/k/.kaystick auto rw,user,noauto,umask=077,fmask=177 0 0 This works great but there is one minor problem: In Nautilus (The Gnome file manager) the mount point ".kaystick" is displayed. I guess Nautilus simply scans the /etc/fstab file and displays everything it finds there. This mount point is pretty useless because it can't be clicked when the device is not present and it can't be clicked when the device is present (Because then it is already mounted). I know this is a really minor problem because I could simply ignore it but I'm a perfectionist and so I want to get rid of this useless mount point in Nautilus. Is there another way to customize the mount point and mount options for a specific USB device? Maybe it can be configured in udev? If yes, how?

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• Google Contacts Error: If-Match or If-None-Match header or entry etag attribute required

  - by Ali

  Hi guys I'm following the example code as defined on this website: http://www.ibm.com/developerworks/opensource/library/x-phpgooglecontact/index.html I want to be able to integrate with my google apps account and play around with teh contacts. However I get this error whenever I try to run the modify contacts code: If-Match or If-None-Match header or entry etag attribute required This is my code: Zend_Loader::loadClass('Zend_Gdata_ClientLogin'); Zend_Loader::loadClass('Zend_Http_Client'); Zend_Loader::loadClass('Zend_Gdata_Query'); Zend_Loader::loadClass('Zend_Gdata_Feed'); $client = getGoogleClient('cp'); // this is a function I made - its working fine $client->setHeaders('If-Match: *'); $gdata = new Zend_Gdata($client); $gdata->setMajorProtocolVersion(3); $query = new Zend_Gdata_Query($id);// id is the google reference $entry = $gdata->getEntry($query); $xml = simplexml_load_string($entry->getXML()); $xml->name->fullName = trim($contact->first_name).' '.trim($contact->last_name); $entryResult = $gdata->updateEntry($xml->saveXML(), $id);

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• Pinyin Character entry on a touchscreen keyboard

  - by mmr

  The app I'm developing requires that it be deployed in China, which means that it needs to have Pinyin and Chinese character handling. I'm told that the way that our customers handle character entry is like so: Enter in the pinyin character, like 'zhang' As they enter the characters, a list of possible Chinese (Mandarin?) characters are presented to the user, like: The user will then select '1' to enter the family name that is roughly translated to 'zhang' How can I hook such programs (I believe one is called 'mspy.exe', from Microsoft, which I'm lead to believe comes with Microsoft versions of XP) into a WPF text box? Right now, the user can enter text either by using their keyboard or by using an on-screen keyboard, so I will probably need to capture the event of a keypress from either source and feed it to some OS event or to MSPY.exe or some similar program. Or is there some other way to enter pinyin and have it converted to Mandarin? Is there a program other than MSPY I should look at? EDIT: For those of you who think that this should 'just work', it does not. Chinese character entry will work just fine if entering text into notepad or the start-run menu or whatever, but it will not work in WPF. That's the key to this question: how do I enable WPF entry? There's the Google Pinyin and Sogou pinyin, but the websites are in Mandarin or Chinese or something similar and I don't read the language.

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• Ideas in implenting the following entry form in ASP.NET MVC 2

  - by KiD0M4N

  Hi guys, I have a very simple data entry form to implement. It looks like this: Obviously I have mocked out the actual requirements but the essence is similar. Entering a name and clicking history should bring up a pop up pointing to the url '/student/viewhistory/{name}' Name and age are required fields The sub form (in the mockup) with Class (a drop down, containing the numbers 1 - 10) and Subject (containing A - D, say) form a unique pair of values for which a score is required. So, selecting the Class and Subject, entering a score and clicking on Add should 'add' this record for the student. Then the user should be able to click Save (to persist the entry to the database) or be able to add further (class, subject, score) pairs to the entry. Any ideas how to smartly implement this? (I am coming from a DWH field... so thinking in a stateless manner is slightly foreign to me.) Any help is appreciated. I would imagine a smart use of jQuery would give a easy solution. Regards, Karan

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• Do I need a Point and a Vector object? Or just using a Vector object to represent a Point is ok?

  - by JCM

  Structuring the components of an engine that I am developing along with a friend (learning purposes), I came to this doubt. Initially we had a Point constructor, like the following: var Point = function( x, y ) { this.x = x; this.y = y; }; But them we started to add some Vector math to it, and them decided to rename it to Vector2d. But now, some methods are a bit confusing (at least in my opinion), such as the following, which is used to make a line: //before the renaming of Point to Vector2, the parameters were startingPoint and endingPoint Geometry.Line = function( startingVector, endingVector ) { //... }; I should make a specific constructor for the Point object, or there are no problems in defining a point as a vector? I know a vector have magnitude and direction, but I see so many people using a vector to just represent the position of an object.

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• 2 Days of Share &amp; Point

  - by Mark Rackley

  Groovy man… SharePoint Saturday Ozarks is back for 2010, bigger and better than before. Join us for a far out time and learn more about SharePoint in one day than you could in a year from the man… Yes! SharePoint Saturday Ozarks is back! SharePoint Saturday Ozarks is the largest SharePoint conference in Arkansas, Southern Missouri, and the very north east tip of Oklahoma. Last year we had a great turn out with 20 speakers, 5 MVPs, and attendees coming from Arkansas, Texas, Oklahoma, Missouri, Kansas, Nebraska, Indiana, Ohio, Alabama, Michigan, and Washington. Hey Man… what’s SharePoint Saturday anyway? Sounds like a conspiracy man… Not to worry, SharePoint Saturday is not an arm of the government bent on mind control or any attempt what-so-ever to bring you down man. SharePoint Saturday is grass roots effort started by Michael Lotter (http://www.sharepointsaturday.org/pages/about.aspx). It is a FREE one day event where the best SharePoint speakers gather to present their love, hatred, and frustrations of SharePoint to those lucky individuals who attend. Lessons are learned, contacts are made, prizes are won, food is eaten, assorted beverages are consumed until wee hours of the morning. SharePoint Saturday started with just a few sporadic one day events here and there. However, over the past year SharePoint Saturday has exploded and it’s hard to find a weekend where there is NOT a SharePoint Saturday event happing in some corner of the globe. There are even occasions where there are two SharePoint Saturdays on the same day! Many people are pleasantly surprised at the caliber of speakers at these SharePoint Saturday events. For the most part, these speakers are more eloquent, practiced, and practical than those speakers you find at the major multi-day conferences. These guys aren’t even paid to speak.. they do it out of love man… SharePoint Saturday Ozarks 2009 Alumni We had a star studded cast last year with many returning this year! Just check out the fun that they had… John Ferringer – Admin rockstar… I can still sense the awesomeness   SharePoint poster children Mike Watson & Laura Rogers     Lori Gowin spreading the SharePoint Love Eric Shupps is a little bit country and a little bit rock and roll       Cathy Dew, Sean McDonough, and JD Wade relaxing between gigs Actually, you can see real photos from last year’s SharePoint Saturday ozarks here:  picasaweb.google.com/mrackley/SharePointSaturdayOzarks#    What’s new for SharePoint Saturday Ozarks 2010 SharePoint Saturday Ozarks 2010 will totally blow your mind man. We’re getting the band back to together with many returning speakers and few new faces. Joel Oleson will be speaking this year, maybe he’ll grace us with his song stylings. Sadly, once again, Andrew Connell will not be able to attend SharePoint Saturday Ozarks, however he did feel the need to show his support in his own way. Prizes this year currently include books, software, a Zune HD, and much more! Wait Man… You said 2 days? I thought it was a one day event? Correct you are my herbal smelling friend… SharePoint Saturday Ozarks 2010 will spread the love an additional day this year. The first day will be all about the SharePoint love, on day 2 we will be taking a leisurely float down the Buffalo National River for those interested in a truly unique experience (no banjos allowed please).   Here are the details: WHAT 4 – 5 hour float down the Buffalo National River WHEN & WHERE Sunday June 13th. We will be leaving at 10am from the Parking Lot of: Gordon’s Motel & Canoe Rental Old Highway 7 Jasper, AR 72641 (870) 446-5252 Jasper is about 30 minutes south of Harrison, AR on Highway 7 South. You are responsible for bumming a ride to/from Gordon’s Motel, but they will be shuttling us to/from the river and providing canoes and a boxed lunch. WHAT ELSE? The float trip is dependent on the weather of course, we won’t be floating down the river in a thunderstorm, however I planned SPS Ozarks around a time of year ideal for floating. We aren’t talking class 5 rapids here, you don’t need any real skill, but you need to be okay with possibly tipping your canoe over once or twice. You can bring your own assorted beverages with you, but glass containers are not allowed on the river. I suggest a small cooler with extra snacks and drinks. Also bring clothing you can get wet in (these SharePoint people can get ornery). HOW DO I SIGN UP? When you register for SharePoint Saturday Ozarks, you will have the option to also sign up for the float trip. Seats are limited though! If you do not intend to go, please do not take someone else’s place.  The cost for the float trip will be about $35 dollars per person (which you are responsible for unless we find a sponsor). The price includes shuttle to/from river, canoe, life jackets, paddles, and boxed lunch. Far out man… how do I register??? You can register for SharePoint Saturday Ozarks by going to http://spsozarks.eventbrite.com/ We are limited to 200 people for the conference and 50 people for the float trip, so register today before we are sold out. Lodging for SharePoint Saturday Ozarks will once again take place at the Hotel Seville: Annex Suites are available for $103.20 This is So Groovy.. How can I help? I’m glad you asked! We are still looking for a few sponsors and one or two more speakers. If you are interested please let me know!  You can find out more information at http://www.sharepointsaturday.org/ozarks Hey… wait a minute…. what exactly IS SharePoint man??? Come to SharePoint Saturday Ozarks and find out!!  See you guys there!

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• Point subdomain to another web hosting

  - by zulhfreelancer

  I buy a domain from GoDaddy. Let's call this domain as abc.com. I've a hosting account on web hosting A with abc.com as my primary domain. I created a sub-domain pic.abc.com and I wish it to be pointed to my new hosting account. This web hosting B also use abc.com as the primary domain. The main purpose of doing this because I only want to use web hosting B to host my pic.abc.com contents. That's all. Other content from *.abc.com and abc.com will be remain in web hosting A. How to do this? Note 1: I try to add pic.abc.com as an add-on domain in my web hosting B account. Unfortunately, I couldn't do that. Note 2: I also try to use URL forwarding method using DNS management service like DNS Social. It doesn't work. Note 3: I'm using WordPress on the pic.abc.com site. Both web hosting A and B running cPanel - Apache servers (shared hosting). Thanks in advance!

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• My laptop can not access internet after setup bridge with wired NIC and wireless NIC

  - by Victor S

  I setup a bridge using wired NIC and wireless NIC in order to make wireless NIC as a Wi-Fi AP to share wired internet access, after setup successfully, the Wi-Fi AP works as my expectation, but my laptop can not access internet, please give me a hand. Thanks. My hostapd.conf $ cat hostapd.conf interface=wlan0 bridge=br0 driver=nl80211 ssid=myAP hw_mode=g channel=11 dtim_period=1 rts_threshold=2347 fragm_threshold=2346 macaddr_acl=0 auth_algs=3 ieee80211n=0 wpa=3 wpa_passphrase=PassWord wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP rsn_pairwise=CCMP Setup steps: $ sudo killall hostapd hostapd: no process found $ sudo hostapd -B hostapd.conf Configuration file: hostapd.conf Using interface wlan0 with hwaddr 00:26:5e:e8:4f:8e and ssid 'myAP' $ sudo brctl addbr br0 device br0 already exists; can't create bridge with the same name $ sudo ifconfig eth0 0.0.0.0 up $ sudo ifconfig wlan0 0.0.0.0 up $ sudo brctl addif br0 eth0 $ sudo brctl addif br0 wlan0 device wlan0 is already a member of a bridge; can't enslave it to bridge br0. $ sudo ifconfig br0 192.168.1.110 netmask 255.255.255.0 $ sudo route add default gw 192.168.1.1

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• How to Turn Your Ubuntu Laptop into a Wireless Access Point

  - by Chris Hoffman

  If you have a single wired Internet connection – say, in a hotel room – you can create an ad-hoc wireless network with Ubuntu and share the Internet connection among multiple devices. Ubuntu includes an easy, graphical setup tool. Unfortunately, there are some limitations. Some devices may not support ad-hoc wireless networks and Ubuntu can only create wireless hotspots with weak WEP encryption, not strong WPA encryption. HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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• How can i point wildcard domains to a folder in apache

  - by Abishek R Srikaanth

  I am developing an app using PHP and deploying it on Apache on the Amazon AWS environment. This app requires to be made available to customers from their own chosen domain name? How can i acheive this? For example www.customer1.com = /var/www/myapp.mydomain.com www.customer2.com = /var/www/myapp.mydomain.com I would like to do this similar to how bitly enables shortened url's for custom domains. www.myshrturl.com is dns configured to a CNAME - cname.bitly.com Appreciate if someone could help me acheive this functionality. If there are any other details required, please let me know, I shall update the same.

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• Script to setup ubuntu as a wireless accesspoint on a bridge mode

  - by nixnotwin

  I use the following script to make my netbook a full-fledged wireless accesspoint. It creates a bridge with eth0 and wlan0 and starts hostapd. #!/bin/bash service network-manager stop ifconfig eth0 0.0.0.0 #remove IP from eth0 ifconfig eth0 up #ensure the interface is up ifconfig wlan0 0.0.0.0 #remove IP from eth1 ifconfig wlan0 up #ensure the interface is up brctl addbr br0 #create br0 node hostapd -d /etc/hostapd/hostapd.conf > /var/log/hostapd.log & sleep 5 brctl addif br0 eth0 #add eth0 to bridge br0 brctl addif br0 wlan0 #add wlan0 to bridge br0 ifconfig br0 192.168.1.15 netmask 255.255.255.0 #ip for bridge ifconfig br0 up #bring up interface route add default gw 192.168.1.1 # gateway This script works efficiently. But if I want to revert back to use Network Manager, I cannot do it. The bridge simply cannot be deleted. How can I modify this script so that if I run bridge_script --stop, the bridge gets deleted, network manager starts and interfaces behave as if the machine had a fresh reboot.

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• Box2D: How to get the Exact Collision Point and ignore the collision (from 2 "ghost bodies")

  - by Moritz

  I have a very basic problem with Box2D. For a arenatype game where you can throw scriptable "missiles" at other players I decided to use Box2D for the collision detection between the players and the missiles. Players and missiles have their own circular shape with a specific size (varying). But I don´t want to use dynamic bodies because the missiles need to move themselve in any way they want to (defined in the script) and shouldnt be resolved unless the script wants it. The behavior I look for is as following (for each time step): velocity of missiles is set by the specific missile script each missile is moved according to that velocity if a collision accurs now, I want to get the exact position of impact, and now I need a mechanism to decide if the missile should just ignore the collision (for example collision between two fireballs which shouldnt interact) or take it (so they are resolved and dont overlap anymore) So is there a way in Box2D to create Ghost bodies and listen to collisions from them, then deciding if they should ignore the collision or should take them and resolve their position? I hope I was clear enough and would be happy about any help!

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• Can't connect to Wireless Access Point after installing proprietary drivers

  - by user6554

  I had Windows Vista Basic installed on my computer and I replaced it with Ubuntu 10.10. I then preceded to do the following: I downloaded the wireless driver from 'additional drivers' I enabled my wireless card And now it won't connect to my router but my game systems will. Then I downloaded WiFi-Radar  which did not seem to fix the problem. I still cannot connect to the Internet. I have done an exhaustive search of the Internet and turned up nothing.

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• Little Wheel Is An Atmospheric and Engaging Point-and-Click Adventure

  - by Jason Fitzpatrick

  If you’re a fan of the resurgence of highly stylized and atmospheric adventure games–such as Spirit, World of Goo, and the like–you’ll definitely want to check out this well executed, free, and more than a little bit charming browser-based game. Little Wheel is set in a world of robots where, 10,000 years ago, a terrible accident at the central power plant left all the robots without power. The entire robot world went into a deep sleep and now, thanks to a freak lightning strike, one little robot has woken up. Your job, as that little robot, is to navigate the world of Little Wheel and help bring it back to life. Hit up the link below to play the game for free–the quality of the visual and audio design make going full screen and turning the speakers on a must. Little Wheel [via Freeware Genuis] How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It? HTG Explains: What Is Windows RT and What Does It Mean To Me?

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• How can I view an R32G32B32 texture?

  - by bobobobo

  I have a texture with R32G32B32 floats. I create this texture in-program on D3D11, using DXGI_FORMAT_R32G32B32_FLOAT. Now I need to see the texture data for debug purposes, but it will not save to anything but dds, showing the error in debug output, "Can't find matching WIC format, please save this file to a DDS". So, I write it to DDS but I can't open it now! The DirectX texture tool says "An error occurred trying to open that file". I know the texture is working because I can read it in the GPU and the colors seem correct. How can I view an R32G32B32 texture in an image viewer?

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• Developing an ELO like point system for a multiplayer gaming site

  - by Alejandro Piad

  I'm currently working on a gaming site where users will submit virtual players for different games, like Chess, Nash, Backgammon, Go, etc. The idea is that users don't compete themselves, but through their virtual players. There will be leagues, tournaments, and other competition formats. The question is which would be a good rating system for users in this environment. Take into account that every user may have many different virtual players playing in many different games. As a general guideline I would like to guarantee the following properties: Users who have a lot of mediocre players should not score higher than users with a few very good players. A user with a high rating should not be penalized if he adds a new bad player, until he has had enough time to improve his player. Users who don't play often should not score higher than users who play every day. Thanks in advance.

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• Turning laptop into WAP using netgear WNA1100? (stuck at hostapd)

  - by Vivek Sharma

  I have a Netgear WNA1100 usb wifi adapter. I have installed Atheros driver from Forum Details (btw name of the file is ath9k_htc-installer.1.0.1-maverick-fixed.deb). I wish to make a setup like connectify(windows) on ubuntu, so that I can connect my phone wirelessly to my laptop via Netgear WNA1100 (behaving as AP) and eventually use internet via my wired lan. I have installed the above mentioned driver, hostapd and hostap-utils. Following is my hostapd.conf file. ssid=vks interface=wlan1 # The interface name of the card driver=ath9k_htc # The card driver macaddr_acl=0 accept_mac_file=/etc/hostapd.accept deny_mac_file=/etc/hostapd.deny ieee80211x=1 # Use 802.1X authentication auth_algs=1 ignore_broadcast_ssid=0 wpa=2 wpa_passphrase=88888888 wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP rsn_pairwise=CCMP When i run sudo hostapd /etc/hostapd/hostapd.conf I get an error invalid/unknown driver 'ath9k_htc # The card driver I think the driver is installed fine, as i can see the blue led blinking on the netgear adapter, which was not blinking earlier. Can someone please guide me how to achieve this setup? I will appreciate an example hostapd.conf file with a simple wpa_psk security setup. Please be detailed and descriptive with commands. How to run and end it. Following is output from lsmod, i have only pasted the entries which had ath and ath related info. Which driver shall i use. Module Size Used by ath9k_htc 42903 0 ath9k_common 2563 1 ath9k_htc ath9k_hw 285176 2 ath9k_htc,ath9k_common ath 13001 2 ath9k_htc,ath9k_hw cfg80211 139811 3 ath9k_htc,mac80211,ath compat 4020 1 cfg80211 led_class 2633 3 ath9k_htc,thinkpad_acpi,sdhci Thanks.

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• OpenGL Tessellation makes point

  - by urza57

  A little problem with my tessellation shader. I try to implement a simple tessellation shader but it only makes points. Here's my vertex shader : out vec4 ecPosition; out vec3 ecNormal; void main( void ) { vec4 position = gl_Vertex; gl_Position = gl_ModelViewProjectionMatrix * position; ecPosition = gl_ModelViewMatrix * position; ecNormal = normalize(gl_NormalMatrix * gl_Normal); } My tessellation control shader : layout(vertices = 3) out; out vec4 ecPosition3[]; in vec3 ecNormal[]; in vec4 ecPosition[]; out vec3 myNormal[]; void main() { gl_out[gl_InvocationID].gl_Position = gl_in[gl_InvocationID].gl_Position; myNormal[gl_InvocationID] = ecNormal[gl_InvocationID]; ecPosition3[gl_InvocationID] = ecPosition[gl_InvocationID]; gl_TessLevelOuter[0] = float(4.0); gl_TessLevelOuter[1] = float(4.0); gl_TessLevelOuter[2] = float(4.0); gl_TessLevelInner[0] = float(4.0); } And my Tessellation Evaluation shader: layout(triangles, equal_spacing, ccw) in; in vec3 myNormal[]; in vec4 ecPosition3[]; out vec3 ecNormal; out vec4 ecPosition; void main() { float u = gl_TessCoord.x; float v = gl_TessCoord.y; float w = gl_TessCoord.z; vec3 position = vec4(gl_in[0].gl_Position.xyz * u + gl_in[1].gl_Position.xyz * v + gl_in[2].gl_Position.xyz * w ); vec3 position2 = vec4(ecPosition3[0].xyz * u + ecPosition3[1].xyz * v + ecPosition3[2].xyz * w ); vec3 normal = myNormal[0] * u + myNormal[1] * v + myNormal[2] * w ); ecNormal = normal; gl_Position = vec4(position, 1.0); ecPosition = vec4(position2, 1.0); } Thank you !

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• what's the point of method overloading?

  - by David

  I am following a textbook in which I have just come across method overloading. It briefly described method overloading as: when the same method name is used with different parameters its called method overloading. From what I've learned so far in OOP is that if I want different behaviors from an object via methods, I should use different method names that best indicate the behavior, so why should I bother with method overloading in the first place?

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• Hot Off the Press - Oracle Exadata: A Data Management Tipping Point

  - by kimberly.billings

  Advances in data-management architecture - including CPU, memory, storage, I/O, and the database - have been steady but piecemeal. In this report, Merv Adrian describes how Oracle Exadata not only provides the latest technology in each part of the data-management architecture, but also integrates them under the full control of one vendor with a unified approach to leveraging the full stack. He writes, "the real "secret sauce" of Oracle Exadata V2 is the way in which these technologies complement each other to deliver additional performance and scalability." Merv interviews two Exadata customers, Banco Transylvania and TUI Netherlands, and concludes that early indications are that Oracle Exadata is delivering on its promise of extreme performance and scalability. His recommendation to IT is to target corporate applications with the biggest potential for speed-based enhancement, and consider whether Oracle Exadata V2 can cost-effectively enable new ways to use these for competitive advantage. Read the full report. var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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• What is the best practice, point of view of well experienced developers

  - by Damien MIRAS

  My manager pushes me to use his self defined best practices. All of these practices are based on is own assumptions. I disagree with them and I would like to have some feedback of well experienced people about these practices. I would prefer answers from people involved in the maintenance of huge products and people whom have maintained the product for years. Developers with 15+ years of experience are preferred because my manager has that much experience himself. I have 7 years of experience. Here are the practices he wants me to use: never extends classes, use composition and interface instead because extending classes are unmaintainable and difficult to debug. What I think about that Extend when needed, respect "Liskov's Substitution Principle" and you'll never be stuck with a problem, but prefer composition and decoration. I don't know any serious project which has banned inheriting, sometimes it's impossible to not use that, i.e. in a UI framework. Design patterns are just unusable. In PHP, for simple use cases (for example a user needs a web interface to view a database table), his "best practice" is: copy some random php code wich we own, paste and modify it, put html and php code in same file, never use classes in PHP, it doesn't work well for small jobs, and in fact it doesn't work well at all, there is no good tool to work with. Copy & paste PHP code is good practice for maintenance because scripts are independent, if you have a bug somewhere you can fix it without side effects. What I think about that: NEVER EVER COPY code or do it because you have five minutes to deliver something, you will do some refactoring after that. Copy & paste code is a beginners error, if you have errors you'll have the error everywhere any time you have pasted it's a nightmare to maintain. If you repsect the "Open Close Principle" you'll rarely get edge effects, use unit test if you are afraid of that. For small jobs in PHP use at least something you get or write the HTML separately from the PHP code and reuse it any time you need it. Classes in PHP are mature, not as mature as other languages like python or java, but they are usable. There is tools to work with classes in PHP like Zend Studio that work very well. The use of classes or not depends not on the language you use but the programming paradigm you have choosen. I'm a OOP developer, I use PHP5, why do I have to shoot myself in the foot? When you find a simple bug in the code, and you can fix it simply, if you are not working on the code where you have found it, never fix it, even if it takes 5 seconds. He says to me his "best practices" are driven by the fact that he has a lot of experience in maintaining software in production (14 years) and he now knows what works and what doesn't work, what the community says is a fad, and the people advocating such principles as never copy & paste code, are not evolved in maintaining applications. What I think about that: If you find a bug fix it if you can do it quickly inform the people who've touched that code before, check if you have not introduced a new bug, ideally add a unit test for it. I currently work on a web commerce project, which serves 15k unique users per day. The code base has to be maintained and has been maintained this way since 2005. Ideally you include a short description of your position and experience in terms of years effectively maintaining an application which has been in production for real.

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• SOA Starting Point: Methods for Service Identification and Definition

  As more and more companies start to incorporate a Service Oriented Architectural design approach into their existing enterprise systems, it creates the need for a standardized integration technology. One common technology used by companies is an Enterprise Service Bus (ESB). An ESB, as defined by Progress Software, connects and mediates all communications and interactions between services. In essence an ESB is a form of middleware that allows services to communicate with one another regardless of framework, environment, or location. With the emergence of ESB, a new emphasis is now being placed on approaches that can be used to determine what Web services should be built. In addition, what order should these services be built? In May 2011, SOA Magazine published an article that identified 10 common methods for identifying and defining services. SOA’s Ten Common Methods for Service Identification and Definition: Business Process Decomposition Business Functions Business Entity Objects Ownership and Responsibility Goal-Driven Component-Based Existing Supply (Bottom-Up) Front-Office Application Usage Analysis Infrastructure Non-Functional Requirements  Each of these methods provides various pros and cons in regards to their use within the design process. I personally feel that during a design process, multiple methodologies should be used in order to accurately define a design for a system or enterprise system. Personally, I like to create a custom cocktail derived from combining these methodologies in order to ensure that my design fits with the project’s and business’s needs while still following development standards and guidelines. Of these ten methods, I am particularly fond of Business Process Decomposition, Business Functions, Goal-Driven, Component-Based, and routinely use them in my designs.  Works Cited Hubbers, J.-W., Ligthart, A., & Terlouw , L. (2007, 12 10). Ten Ways to Identify Services. Retrieved from SOA Magazine: http://www.soamag.com/I13/1207-1.php Progress.com. (2011, 10 30). ESB ARCHITECTURE AND LIFECYCLE DEFINITION. Retrieved from Progress.com: http://web.progress.com/en/esb-architecture-lifecycle-definition.html

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