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• Oracle Database Appliance Technical Boot Camp

  - by mseika

  Oracle Database Appliance Technical Boot Camp Wednesday 19th September 9.30 – 16.30 This session is designed to give our partners detailed sales and technical information to familiarise themselves with the Oracle Database Appliance. It is split into two sessions, the first aimed at sales and pre-sales technical support, and the second aimed at pre-sales and technical implementation staff. The agenda is as follows: Part 1 Oracle Engineered Systems Introducing the Oracle Database Appliance What is the target market? Competitive positioning Sales Plays Up sell opportunities Resell requirements and process Part 2 Hardware internals Download the appliance software kit Disabling / enabling cores Configuration and setup Oracle 11g R2 overview Backup strategies Please register here.

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• Sporadic disk clicking sound

  - by Abdó

  Hi, I'm having some unusual and sporadic hard disk clicking issues. Here is a cronological description of the facts. I'm using an ASUS P6T-SE with Intel Core i7, 6Gb RAM 600W Power supply and ATI4670 graphics, running Ubuntu 10.10. About one month ago my hard disk (SATA II Seagate Barracuda 1Tb 7200 rpm) started making a clicking sound: a sort of loud tic-tac, every second or so, when involved in disk activity. The system was clearly slower than before at disk access, but it was functional and I could not find any signal of trouble on the linux logs. I disconnected the disk and tried an older SATA drive I had around: no problem with it. Then I reconnected the Seagate disk, and the problem was mysteriously gone. Ubuntu booted normally, usual speed, no clicking. A couple of weeks later, the problem reappeared. I tried disconnecting reconnecting (as it somehow solved the problem before) without luck. So, despite it was a rather new drive, I assumed it was a hardware issue, made backups and bought a new drive. The new drive is a SATA II Seagate Barracuda 1.5 Tb 7200 rpm. I installed both drives at the same time, with the intention of transferring my files from on to the other. To my surprise, when I booted the computer with both drives, both started making the clicking sound !! Even worse, I removed the old drive, leaving the unformated new drive connected, and booted from a LiveCD. It kept clicking ! Puzzled by this, I tried both drives on my laptop with a SATA to USB cable. At the moment I connected any of them, they made one or two unusual clicks and immediately stopped doing that and worked normally. The old drive I thought almost dead, was working like a charm as if nothing happened. Then I thought: "ok, it must be the motherboard. Let's try again". So, I reconnected the old drive to the ASUS P6T motherboard (the same cables and SATA port as before), and it worked as if nothing happened ! The problem was gone again. The new 1.5 Tb drive was also working ok: No clicking nor slowdown. So I left the old 1Tb disk connected and kept using the computer daily during 3 weeks, until today it happened again. Now I don't really know what to do or check. I'm not even sure if it is a hardware issue any more ! This is rather annoying as it seems it happens with a period of 2 or 3 weeks and I have no means of forcing it to happen. Does anyone have a clue of what can causes this behaviour or have any suggestions of things I should check when it happens again ? What I did today is checking some SMART parameters Error log: smartctl -l error /dev/sda. No errors Short selftest: smartctl -t short /dev/sda. No errors Disk Health check: smartctl -H /dev/sda. passed And here are the vendor specific parameters (smartctl -A /dev/sda) Which I'm not quite sure how to interpret. === START OF READ SMART DATA SECTION === SMART Attributes Data Structure revision number: 10 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 120 099 006 Pre-fail Always - 235962588 3 Spin_Up_Time 0x0003 095 095 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 187 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 072 060 030 Pre-fail Always - 16348045 9 Power_On_Hours 0x0032 096 096 000 Old_age Always - 3590 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 94 183 Runtime_Bad_Block 0x0032 100 100 000 Old_age Always - 0 184 End-to-End_Error 0x0032 100 100 099 Old_age Always - 0 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 188 Command_Timeout 0x0032 100 097 000 Old_age Always - 4295164029 189 High_Fly_Writes 0x003a 100 100 000 Old_age Always - 0 190 Airflow_Temperature_Cel 0x0022 070 057 045 Old_age Always - 30 (Lifetime Min/Max 19/31) 194 Temperature_Celsius 0x0022 030 043 000 Old_age Always - 30 (0 18 0 0) 195 Hardware_ECC_Recovered 0x001a 037 026 000 Old_age Always - 235962588 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0 240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 73950746906346 241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 1832967731 242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 3294986902 Any clue to this mystery will be really welcome. Thank you very much !!

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• Top Questions and Answers for Pluging into Oracle Database as a Service

  - by David Swanger

  Yesterday we hosted a comprehensive online forum that shared a comprehensive path to help your organization design, deploy, and deliver a Database as a Service cloud. If you missed the online forum, you can watch it on demand by registering here. We received numerous questions.  Below are highlights of the most informative: DBaaS requires a lengthy and careful design efforts. What is the minimum requirements of setting up a scaled-down environment and test it out? You should have an OEM 12c environment for DBaaS administration and then a target database deployment platform that has the key characteristics of what your production environment will look like. This could be a single server or it could be a small pool of hosts if your production DBaaS will be larger and you want to test a more robust / real world configuration with Zones and Pools or DR capabilities for example. How does this benefit companies having their own data center? This allows companies to transform their internal IT to a service delivery model for the database. The benefits to the company are significant cost savings, improved business agility and reduced risk. The benefits to the consumers (internal) of services if much fast provisioning, and response to change in business requirements. From a deployment perspective, is DBaaS's job solely DBA's job? The best deployment model enables the DBA (or end-user) to control the entire process. All resources required to deploy the service are pre-provisioned, and there are no external dependencies (on network, storage, sysadmins teams). The service is created either via a self-service portal or by the DBA. The purpose of self service seems to be that the end user does not rely on the DBA. I just need to give him a template. He decides how much AMM he needs. Why shall I set it one by one. That doesn't seem to be the purpose of self service. Most customers we have worked with define a standardized service catalog, with a few (2 to 5) different classes of service. For each of these classes, there is a pre-defined deployment template, and the user has the ability to select from some pre-defined service sizes. The administrator only has to create this catalog once. Each user then simply selects from the options offered in the catalog.  Looking at DBaaS service definition, it seems to be no different from a service definition provided by a well defined DBA team. Why do you attribute it to DBaaS? There are a couple of perspectives. First, some organizations might already be operating with a high level of standardization and a higher level of maturity from an ITIL or Service Management perspective. Their journey to DBaaS could be shorter and their Service Definition will evolve less but they still might need to add capabilities such as Self Service and Metering/Chargeback. Other organizations are still operating in highly siloed environments with little automation and their formal Service Definition (if they have one) will be a lot less mature today. Therefore their future state DBaaS will look a lot different from their current state, as will their Service Definition. How database as a service impact or help with "Click to Compute" or deploying "Database in cloud infrastructure" DBaaS enables Click to Compute. Oracle DBaaS can be implemented using three architecture models: Oracle Multitenant 12c, native consolidation using Oracle Database and consolidation using virtualization in infrastructure cloud. As Deploy session showed, you get higher consolidating density and efficiency using Multitenant and higher isolation using infrastructure cloud. Depending upon your business needs, DBaaS can be implemented using any of these models. How exactly is the DBaaS different from the traditional db? Storage/OS/DB all together to 'transparently' provide service to applications? Will there be across-databases access by application/user. Some key differences are: 1) The services run on a shared platform. 2) The services can be rapidly provisioned (< 15 minutes). 3) The services are dynamic and can be relocated, grown, shrunk as needed to meet business needs without disruption and rapidly. 4) The user is able to provision the services directly from a standardized service catalog.. With 24x7x365 databases its difficult to find off peak hrs to do basic admin tasks such as gathering stats, running backups, batch jobs. How does pluggable database handle this and different needs/patching downtime of apps databases might be serving? You can gather stats in Oracle Multitenant the same way you had been in regular databases. Regarding patching/upgrading, Oracle Multitenant makes patch/upgrade very efficient in that you can pre-provision a new version/patched multitenant db in a different ORACLE_HOME and then unplug a PDB from its CDB and plug it into the newer/patched CDB in seconds.  Thanks for all the great questions!  If you'd like to learn more and missed the online forum, you can watch it on demand here.

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• Caching items in Orchard

  - by Bertrand Le Roy

  Orchard has its own caching API that while built on top of ASP.NET's caching feature adds a couple of interesting twists. In addition to its usual work, the Orchard cache API must transparently separate the cache entries by tenant but beyond that, it does offer a more modern API. Here's for example how I'm using the API in the new version of my Favicon module: _cacheManager.Get( "Vandelay.Favicon.Url", ctx => { ctx.Monitor(_signals.When("Vandelay.Favicon.Changed")); var faviconSettings = ...; return faviconSettings.FaviconUrl; }); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } There is no need for any code to test for the existence of the cache entry or to later fill that entry. Seriously, how many times have you written code like this: var faviconUrl = (string)cache["Vandelay.Favicon.Url"]; if (faviconUrl == null) { faviconUrl = ...; cache.Add("Vandelay.Favicon.Url", faviconUrl, ...); } Orchard's cache API takes that control flow and internalizes it into the API so that you never have to write it again. Notice how even casting the object from the cache is no longer necessary as the type can be inferred from the return type of the Lambda. The Lambda itself is of course only hit when the cache entry is not found. In addition to fetching the object we're looking for, it also sets up the dependencies to monitor. You can monitor anything that implements IVolatileToken. Here, we are monitoring a specific signal ("Vandelay.Favicon.Changed") that can be triggered by other parts of the application like so: _signals.Trigger("Vandelay.Favicon.Changed"); In other words, you don't explicitly expire the cache entry. Instead, something happens that triggers the expiration. Other implementations of IVolatileToken include absolute expiration or monitoring of the files under a virtual path, but you can also come up with your own.

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• Using IF statements to find string length in array for alignment (Visual Basic)

  - by Brodoin

  My question is just as it says in the title. How would one use IF statements to find the string-length of content in an array, and then make it so that they show up in a Rich Text Box with the left sides aligned? Noting that one value in my array is a Decimal. Imports System.IO Imports System.Convert Public Class frmAll 'Declare Streamreader Private objReader As StreamReader 'Declare arrays to hold the information Private strNumber(24) As String Private strName(24) As String Private strSize(24) As String Private decCost(24) As Integer Private Sub frmAll_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 'Set objReader objReader = New StreamReader("products.csv") 'Call the FillArray sub to fill the array Call FillArray() End Sub Private Sub FillArray() 'Declare variables and arrays Dim decCost(24, 1) As Decimal Dim strFields() As String Dim strRec As String Dim intCount As Integer = 0 Dim chrdelim As Char = ToChar(",") 'Set strRec to read the lines strRec = objReader.ReadLine 'Do while loop to fill array. Do While strRec <> Nothing strFields = strRec.Split(chrdelim) strNumber(intCount) = strFields(0) strName(intCount) = strFields(1) strSize(intCount) = strFields(2) decCost(intCount, 0) = ToDecimal(strFields(3)) decCost(intCount, 1) = ToDecimal(strFields(4)) 'Set strRec to read the lines again strRec = objReader.ReadLine 'increment the index intCount += 1 Loop 'Call the Calculate sub for calculation Call Calculate(decCost) End Sub Private Sub Calculate(ByVal numIn(,) As Decimal) 'Define arrays to hold total cost Dim decRowTotal(24) As Decimal 'Define variables to hold the counters for rows and columns Dim intR As Integer Dim intC As Integer 'Calcualte total cost For intC = 0 To 1 For intR = 0 To 24 decRowTotal(intR) += numIn(intR, intC) * 1 Next Next 'Call the Output sub to configure the output. Call Output(numIn, decRowTotal) End Sub Private Sub Output(ByVal NumIn(,) As Decimal, _ ByVal RowTotalIn() As Decimal) 'Variables Dim strOut As String Dim intR As Integer = 0 Dim intC As Integer = 0 'Set header for output. strOut = "ID" & vbTab & "Item" & vbTab & vbTab & vbTab & "Size" & _ vbTab & vbTab & vbTab & vbTab & "Total Price" & _ vbCrLf & "---------- ... -------------------------" & vbCrLf 'For loop to add each line to strOut, setting 'the RowTotalIn to currency. For intC = 0 To 24 strOut &= strNumber(intC) & vbTab strOut &= strName(intC) & vbTab strOut &= strSize(intC) & vbTab strOut &= RowTotalIn(intC).ToString("c") & vbCrLf Next 'Add strOut to rbtAll rtbAll.Text = strOut End Sub End Class Output It shows up with vbTabs in my output, but still, it looks similar in that they are not aligned. The first two do, but after that they are not, and I am totally lost. P0001 Coffee - Colombian Supreme 24/Case: Pre-Ground 1.75 Oz Bags $16.50 P0002 Coffee - Hazelnut 24/Case: Pre-Ground 1.75 Oz Bags $24.00 P0003 Coffee - Mild Blend 24/Case: Pre-Ground 1.75 Oz Bags $20.50 P0004 Coffee - Assorted Flavors 18/Case. Pre-Ground 1.75 Oz Bags $23.50 P0005 Coffee - Decaf 24/Case: Pre-Ground 1.75 Oz Bags $20.50

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• Oracle Virtualization Friday Spotlight - November 8, 2013

  - by Monica Kumar

  Hands-on Private Cloud Simulator In One Hour Submitted by: Doan Nguyen, Senior Principal Product Marketing Director My aeronautics instructor used to say, "you can’t appreciate flying until you take flight." To clarify, this is not about gearing up in a flying squirrel suit and hopping off a cliff (topic for another blog!) but rather about flying an airplane. The idea is to get hands-on with the controls at the cockpit and experience flight before you actually fly a real plane. After the initial 40 hours of flight time, the concept sank in and it really made sense.This concept is what inspired our technical experts to put together the hands-on lab for a private cloud deployment and management self-service model. Yes, we are comparing the lab to a flight simulator! Let’s look at the parallels: To get trained to fly, starting in the simulator gets you off the ground quicker. There is no need to have a real plane to begin with. In a hands-on lab, there is no need for a real server, with networking and real storage installed. All you need is your laptop The simulator is pre-configured, pre-flight check done. Similarly, in a hands-on lab, Oracle VM and Oracle Enterprise Manager are pre-configured and assembled using Oracle VM VirtualBox as the container. Software installations are not needed. After time spent training at the controls, you can really appreciate the practical experience of flying. Along the same lines, the hands-on lab is a guided learning path, without the encumbrances of hardware, software installation, so you can learn about cloud deployment and management.  However, unlike the simulator training, your time investment with the lab is only about an hour and not 40 hours! This hands-on lab takes you through private cloud deployment and management using Oracle VM and  Oracle Enterprise Manager Cloud Control 12c in an Infrastructure as a service IaaS model. You will first configure the IaaS cloud as the cloud administrator and then deploy guest virtual machines (VMs) as a self-service user. Then you are ready to take flight into the cloud! Why not step into the cockpit now!

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• WebLogic Silent Install 11.1.1.4 (WLS 10.3.4)

  - by john.graves(at)oracle.com

  This is just a quick note to remind myself of how incredibly easy it is to install the base products without the aid of a mouse! Note to Windoze users: Why?!?!  I’m only showing Linux examples in this blog so I encourage you to just say NO to win-no-z  install.sh !/bin/bash ./wls1034_oepe111161_linux32.bin -mode=silent -silent_xml=./silent.xml silent.xml <?xml version="1.0" encoding="UTF-8"?> <bea-installer> <input-fields> <data-value name="BEAHOME" value="/opt/app/wls10.3.4" /> <data-value name="WLS_INSTALL_DIR" value="/opt/app/wls10.3.4/wlserver_10.3" /> </input-fields> </bea-installer> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } Note about Oracle_Home: Since all products are moving to a common WLS base, I simply use the WLS version as my Oracle Home.  In this case wls10.3.4.  Also, I keep my user_projects outside my Oracle_Home directory to keep things clean.  I typically use /opt/app/user_projects or a variation of that.

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• JOB OF THE WEEK

  - by Tim Koekkoek

  ERP Pre-Sales Consultant - Malaga The job as a ERP Pre-Sales consultant is challenging and diverse and you will be working in a multinational environment in our EMEA Presales Centre in the vibrant city of Malaga. Frequent possibilities to support opportunities in various industries and countries will give you an excellent insight into customer business needs and market trends. You will support the ERP Presales organisation for the Benelux, Germany, UK and Spain (depending on your language) and be trained in the Oracle ERP product portfolio as well as the Presales role. If you are interested in this position, read more here! For all of our other vacancies and internships, please visit https://campus.oracle.com.

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• How should I store a Game Database on Android?

  - by Liam

  I'm looking at creating a game for Android and while I have most of the ins and outs worked out, the one thing I'm struggling with is how to store data for the game. Ultimately, the game will be based off of a lot of pre-defined data and statistics so the obvious choice to me would be something like SQLite, but as I'm pretty new to the realm of Android and Game Development, I'm not 100% certain if this is the right route to follow. The data will be general pre-defined data as well as player data (along the lines of careers stats - what place finished, etc). I was wondering if there was a better/best practice solution that wasn't SQLite and that would provide said functionality and if so, could you point me in the right direction?

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• Dell M6800 with Windos 8.1 on part-1, cannot run if Ubuntu and Fedora are 2nd and 3rd OSsen?

  - by user289334

  On a Dell M6800 machine that has Windows 8 pre-installed, I upgraded to 8.1, then I loaded Ubuntu 14.04 then Fedora 20 the only way I could, that is in "Legacy" BIOS Mode. BTW the Ubuntu install was unable to complete but Fedora did, and left all working, 2 bootable OSsen, with Grub2 from Fedora doing the boots, but Windows 8.1 is now "invisible". I have run Boot-Repair but info is not useful. It tells me to switch to UEFI which, on M6800, doesn't work with this (too long-winded to explain why here). I need to have the Grub2 configs "see" the original Windows 8.1 partition, with BIOS switched to "Legacy". BTW various posts have said make switch to UEFI to boot from, say, USB-stick or DVD; this is wrong, you can't - UEFI mode only allows boot from the Windows partition, which it says has a Windows 8.1 on it, which doesn't boot. Basically, if you have actually succeeded in loading Ubuntu 14.04 or Fedora 20 on an M6800, which comes with pre-loaded Windows 8, you will know how I fix this.

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• php file upload problem [closed]

  - by newcomer

  This code works properly in my localhost. I am using xampp 1.7.3. but when I put it in the live server it shows Possible file upload attack!. 'upload/' is the folder under 'public_html' folder on the server. I can upload files via other script in that directory. <?php $uploaddir = '/upload/';//I used C:/xampp/htdocs/upload/ in localhost. is it correct here? $uploadfile = $uploaddir . basename($_FILES['file_0']['name']); echo '<pre>'; if (move_uploaded_file($_FILES['file_0']['tmp_name'], $uploadfile)) { echo "File is valid, and was successfully uploaded.\\n"; } else { echo "Possible file upload attack!\\n"; } echo 'Here is some more debugging info:'; print_r($_FILES); print "</pre>"; ?>

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• CounterPath Introduces Bria for Asterisk

  The company&#146;s newest softphone is pre-integrated with the open-source Asterisk platform.

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• Melhoria de Performance no .NET 4.5: Multicore Just-in-Time (JIT).

  - by anobre

  Olá pessoal! Dando uma lida nas melhorias de performance da plataforma .NET 4.5, me deparei com algo extremamente interessante: Multicore Just-in-Time (JIT). A teoria é muito simples: por que não utilizar vários núcleos para a compilação JIT? Além disto, será que seria possível compilar os métodos em uma determinada ordem, onde os primeiros fossem aqueles com maior probabilidade de execução? Isto parece meio loucura mas é o que o Multicore Just-in-Time (JIT) faz. E o melhor de tudo, de uma forma extremamente simples. As aplicações ASP.NET 4.5 já o fazem por default. Em outras ocasiões, basta executar duas linhas de código: uma indicando a pasta onde o arquivo que armazenará o profile ficará, e a outra para iniciar o procedimento. Este profile é o arquivo responsável por armazenar a ordem de compilação dos métodos, para que aqueles com maior chance de serem executados mais cedo sejam compilados antes. Código para este processo: ProfileOptimization.SetProfileRoot(@"C:\ProfileRoot"); ProfileOptimization.StartProfile("profile"); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } Esta otimização na compilação só será notada após a criação do profile. Portanto, na primeira vez nada será percebido. Ao final do processo, um arquivo com o nome escolhido (no caso profile) será criado, na pasta indicada como root: Fica a dica! Abraços!

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• VirtualBox 4.0?????&Oracle DB???????

  - by Yusuke.Yamamoto

  ??????????????????????? Oracle VM VirtualBox 4.0 ??????????? ????????????????????? ??????????????????????????????????????????????????? Oracle Unveils Oracle VM VirtualBox 4.0(??) ??????PC????Oracle VM VirtualBox?????????????? - ??? ??????????VirtualBox ????????????????????????Oracle VM VirtualBox Pre-built Appliances?????????? ?????????????VirtualBox ??????????????????????????????????????PC?????????????????????? ?????Developer Days Appliance????Oracle Enterprise Linux 5 ?? Oracle Database 11g Release 2 / TimesTen In-Memory Database Cache ????????????? ?????????????????????? Oracle VM VirtualBox Pre-built Appliances Database App Development VM Appliance aka Oracle VM VirtualBox Appliance - wmo6hash::blog Oracle VM VirtualBox??? - @IT

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• Using extension methods to decrease the surface area of a C# interface

  - by brian_ritchie

  An interface defines a contract to be implemented by one or more classes.  One of the keys to a well-designed interface is defining a very specific range of functionality. The profile of the interface should be limited to a single purpose & should have the minimum methods required to implement this functionality.  Keeping the interface tight will keep those implementing the interface from getting lazy & not implementing it properly.  I've seen too many overly broad interfaces that aren't fully implemented by developers.  Instead, they just throw a NotImplementedException for the method they didn't implement. One way to help with this issue, is by using extension methods to move overloaded method definitions outside of the interface. Consider the following example: .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: Consolas, "Courier New", Courier, Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } 1: public interface IFileTransfer 2: { 3: void SendFile(Stream stream, Uri destination); 4: } 5:   6: public static class IFileTransferExtension 7: { 8: public static void SendFile(this IFileTransfer transfer, 9: string Filename, Uri destination) 10: { 11: using (var fs = File.OpenRead(Filename)) 12: { 13: transfer.SendFile(fs, destination); 14: } 15: } 16: } 17:   18: public static class TestIFileTransfer 19: { 20: static void Main() 21: { 22: IFileTransfer transfer = new FTPFileTransfer("user", "pass"); 23: transfer.SendFile(filename, new Uri("ftp://ftp.test.com")); 24: } 25: } In this example, you may have a number of overloads that uses different mechanisms for specifying the source file. The great part is, you don't need to implement these methods on each of your derived classes.  This gives you a better interface and better code reuse.

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• Which game library/engine to choose?

  - by AllTheThingsSheSaid

  I'm not a programming beginner at all. I've tried 2 libraries/engines so far, allegro and Unity. For allegro. i think its not good if i wanna make a career in gaming industry since its not powerful enough. I don't feel comfortable with unity. Its more like a software like photoshop or flash. You can do almost everything with pre-defined functions, tools and with less coding. I need something which offers less tools and pre defined functions and more coding work. It would be awesome if its free and c/c++ based. I need both 2D/3D. and please, don't tell me to make my own library, i am not "that" advance. Any other information about gaming industry would be greatly appreciated.

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• jQuery 1.8 permettra de construire son propre build du framework JavaScript, sa déclinaison pour UI mobile également

  JQuery 1.8 permettra de construire son propre build Du framework JavaScript, sa déclinaison pour UI mobile également Nous l'avouons sans détour, c'est avec un peu de retard que nous nous faisons l'écho de la sortie de la pré-version de JQuery 1.8 et de la version officielle de JQuery Mobile 1.1.0. Mais comme dit le dicton, mieux vaut tard que jamais. Principale nouveauté de la pré-version 1.8 du Framework JavaScript, la possibilité de construire son propre build pour ajouter ou ne garder que les modules voulus (ajax, css, dimensions, effects, offset). Du côté de la version pour navigateurs mobiles du framework - qui permet de réaliser des UI tactiles (fortement inspirées d'...

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• Generate GUID from any string using C#

  - by Haitham Khedre

  Some times you need to generate GUID from a string which is not valid for GUID constructor . so what we will do is to get a valid input from string that the GUID constructor will accept it. It is recommended to be sure that the string that you will generate a GUID from it some how unique. The Idea is simple is to convert the string to 16 byte Array which the GUID constructor will accept it. The code will talk : using System; using System.Text; namespace StringToGUID { class Program { static void Main(string[] args) { int tokenLength = 32; int guidByteSize = 16; string token = "BSNAItOawkSl07t77RKnMjYwYyG4bCt0g8DVDBv5m0"; byte[] b = new UTF8Encoding().GetBytes(token.Substring(token.Length - tokenLength, tokenLength).ToCharArray(), 0, guidByteSize); Guid g = new Guid(b); Console.WriteLine(g.ToString()); token = "BSNePf57YwhzeE9QfOyepPfIPao4UD5UohG_fI-#eda7d"; b = new UTF8Encoding().GetBytes(token.Substring(token.Length - tokenLength, tokenLength).ToCharArray(), 0, guidByteSize); g = new Guid(b); Console.WriteLine(g.ToString()); Console.Read(); } } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   And The output: 37306c53-3774-5237-4b6e-4d6a59775979 66513945-794f-7065-5066-4950616f3455

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• Upgrade Ubuntu 10.04 to Ubuntu 10.10

  - by user8561

  Hi. I'm new to these forums so I'll be quick. When I try to upgrade to Ubuntu 10.10 from 10.04 I get this error, I have tried upgrading from Terminal and Update Manager as well. Could not determine the upgrade An unresolvable problem occurred while calculating the upgrade: E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu If none of this applies, then please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report. Restoring original system state Thanks Aborting

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• Version Not Final, Does not represent actual game footage?

  - by thinly veiled question mark

  Just curious about this. Frequently, a lot of gameplay videos from big studios have small subtitled text at the lower part of the screen, reading something like: Pre-Alpha Gameplay -- Footage not Final Game Footage not Final Pre-Alpha, Game here is not final Is there some sort of reason they do this? Is there some sort of legal ramification that they need to go through by adding this? I have especially seen some gameplay vids whose titles are "Alpha x.x.x", yet still, in the video itself, it always something like "footage not final, game may change".

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• How can I format an SD card with a more robust Linux-usable filesystem with a specific cluster size for better write performace?

  - by Harvey

  Goal: microSD card formatted... for best write performance for use only with embedded Linux for better reliability (random power failures may occur) using an 64kB cluster size I'm using an 8GB microSD card for data storage inside an embedded Linux/ARM device. The SD card is not removable. I've been using ext3 instead of the pre-installed FAT32 because it seems to better handle random power failures during writes. However, I kept noticing that my write performance is always best with the pre-installed FAT32 from Kingston. If I reformat the card with FAT32, the performance still suffers. After browsing wikipedia, I stumbled upon the following comment saying that some cards are optimized for specific cluster sizes. In my case, the Kingston comes pre-formatted for an 64kB cluster size. Risks of reformatting Reformatting an SD card with a different file system, or even with the same one, may make the card slower, or shorten its lifespan. Some cards use wear leveling, in which frequently modified blocks are mapped to different portions of memory at different times, and some wear-leveling algorithms are designed for the access patterns typical of the file allocation table on a FAT16 or FAT32 device.[60] In addition, the preformatted file system may use a cluster size that matches the erase region of the physical memory on the card; reformatting may change the cluster size and make writes less efficient.

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• SVN Error 403 Forbidden

  - by Chris

  I can't figure this out. I try to import a new project into a svn repository from Netbeans and get 403 Forbidden. I just setup svn on my serverbox today. I can get to it through a browser just fine, though its empty as I haven't imported my project yet. Apache's path for html files is /var/www I setup the svn repo in /var/svn This is the structure of /var/svn [root@localhost svn]# ls -lR /var/svn /var/svn: total 4 drwxrwxrwx 7 apache apache 4096 2010-03-26 10:18 repo /var/svn/repo: total 36 drwxrwxrwx 2 apache apache 4096 2010-03-26 09:47 conf drwxrwxrwx 3 apache apache 4096 2010-03-26 10:18 dav drwxrwsrwx 6 apache apache 4096 2010-03-26 11:19 db -rwxrwxrwx 1 apache apache 2 2010-03-26 09:47 format drwxrwxrwx 2 apache apache 4096 2010-03-26 09:47 hooks drwxrwxrwx 2 apache apache 4096 2010-03-26 09:47 locks -rwxrwxrwx 1 apache apache 229 2010-03-26 09:47 README.txt -rwxrwxrwx 1 apache apache 15 2010-03-26 09:47 svnauth -rwxrwxrwx 1 apache apache 43 2010-03-26 09:48 svnpass /var/svn/repo/conf: total 12 -rwxrwxrwx 1 apache apache 1080 2010-03-26 09:47 authz -rwxrwxrwx 1 apache apache 309 2010-03-26 09:47 passwd -rwxrwxrwx 1 apache apache 2279 2010-03-26 09:47 svnserve.conf /var/svn/repo/dav: total 4 drwxrwxrwx 2 apache apache 4096 2010-03-26 11:19 activities.d /var/svn/repo/dav/activities.d: total 0 /var/svn/repo/db: total 48 -rwxrwxrwx 1 apache apache 2 2010-03-26 09:47 current -rwxrwxrwx 1 apache apache 22 2010-03-26 09:47 format -rwxrwxrwx 1 apache apache 1920 2010-03-26 09:47 fsfs.conf -rwxrwxrwx 1 apache apache 5 2010-03-26 09:47 fs-type -rwxrwxrwx 1 apache apache 2 2010-03-26 09:47 min-unpacked-rev -rwxrwxrwx 1 apache apache 4096 2010-03-26 09:47 rep-cache.db drwxrwsrwx 3 apache apache 4096 2010-03-26 09:47 revprops drwxrwsrwx 3 apache apache 4096 2010-03-26 09:47 revs drwxrwsrwx 2 apache apache 4096 2010-03-26 11:19 transactions -rwxrwxrwx 1 apache apache 2 2010-03-26 11:19 txn-current -rwxrwxrwx 1 apache apache 0 2010-03-26 09:47 txn-current-lock drwxrwsrwx 2 apache apache 4096 2010-03-26 11:19 txn-protorevs -rwxrwxrwx 1 apache apache 37 2010-03-26 09:47 uuid -rwxrwxrwx 1 apache apache 0 2010-03-26 09:47 write-lock /var/svn/repo/db/revprops: total 4 drwxrwsrwx 2 apache apache 4096 2010-03-26 09:47 0 /var/svn/repo/db/revprops/0: total 4 -rwxrwxrwx 1 apache apache 50 2010-03-26 09:47 0 /var/svn/repo/db/revs: total 4 drwxrwsrwx 2 apache apache 4096 2010-03-26 09:47 0 /var/svn/repo/db/revs/0: total 4 -rwxrwxrwx 1 apache apache 115 2010-03-26 09:47 0 /var/svn/repo/db/transactions: total 0 /var/svn/repo/db/txn-protorevs: total 0 /var/svn/repo/hooks: total 36 -rwxrwxrwx 1 apache apache 1955 2010-03-26 09:47 post-commit.tmpl -rwxrwxrwx 1 apache apache 1638 2010-03-26 09:47 post-lock.tmpl -rwxrwxrwx 1 apache apache 2267 2010-03-26 09:47 post-revprop-change.tmpl -rwxrwxrwx 1 apache apache 1567 2010-03-26 09:47 post-unlock.tmpl -rwxrwxrwx 1 apache apache 3404 2010-03-26 09:47 pre-commit.tmpl -rwxrwxrwx 1 apache apache 2410 2010-03-26 09:47 pre-lock.tmpl -rwxrwxrwx 1 apache apache 2764 2010-03-26 09:47 pre-revprop-change.tmpl -rwxrwxrwx 1 apache apache 2100 2010-03-26 09:47 pre-unlock.tmpl -rwxrwxrwx 1 apache apache 2758 2010-03-26 09:47 start-commit.tmpl /var/svn/repo/locks: total 8 -rwxrwxrwx 1 apache apache 139 2010-03-26 09:47 db.lock -rwxrwxrwx 1 apache apache 139 2010-03-26 09:47 db-logs.lock I've got httpd.conf loading svn.conf which contains: <Location /svn> DAV on DAV svn #SVNParentPath /var/svn SVNPath /var/svn/repo Authtype Basic AuthName "Subversion" AuthUserFile /var/svn/repo/svnpass Require valid-user AuthzSVNAccessFile /var/svn/repo/svnauth </Location> Full error message is: org.tigris.subversion.javahl.ClientException: RA layer request failed Server sent unexpected return value (403 Forbidden) in response to CHECKOUT request for '/svn/!svn/bln/0' Sorry for the incredibly long post, but I thought more info would be better than less. I've been fidgeting with this problem for a long time now.

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• Paypal NVP API - Keep getting error 81002

  - by Andree

  Hi there, I am new to PayPal API, and I'm having trouble calling SetExpressCheckout using CURL in PHP. I have set everything correctly, as far as I'm concerned, but I kept getting an 81002 error "Method Specified is not Supported". The code snippet is below. I got the CA Root certificates file from here. <?php $paypal_data = array( 'USER' => urlencode('andree_1272823561_biz_api1.gmail.com'), 'PWD' => urlencode('1272823576'), 'SIGNATURE' => urlencode('Am1t0wiu2tv7VwZ5ebdeY9zv1GF6Ad0PFz-qTGFFf7vbWU6ee4bxy8KL'), 'VERSION' => urlencode('52.0'), 'PAYMENTACTION' => urlencode('Sale'), 'METHOD' => urlencode('SetExpressCheckout'), 'AMT' => urlencode('52.00'), 'RETURNURL' => urlencode('get_express_checkout_details.php'), 'CANCELURL' => urlencode('index.php') ); $url = 'https://api-3t.sandbox.paypal.com/nvp?' . http_build_query($paypal_data); $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, $url); curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); curl_setopt($curl, CURLOPT_CAINFO, dirname(__FILE__) . '/cacert.pem'); $result = curl_exec($curl); curl_close($curl); parse_str($result, $result); ?> <pre>Data sent: <?php print_r($paypal_data); ?></pre> <pre>Result: <?php print_r($result); ?></pre> When I run the code, the output is the following: Data sent: Array ( [USER] => andree_1272823561_biz_api1.gmail.com [PWD] => 1272823576 [SIGNATURE] => Am1t0wiu2tv7VwZ5ebdeY9zv1GF6Ad0PFz-qTGFFf7vbWU6ee4bxy8KL [VERSION] => 52.0 [PAYMENTACTION] => Sale [METHOD] => SetExpressCheckout [AMT] => 52.00 [RETURNURL] => get_express_checkout_details.php [CANCELURL] => index.php ) Result: Array ( [ACK] => Failure [L_ERRORCODE0] => 81002 [L_SHORTMESSAGE0] => Unspecified Method [L_LONGMESSAGE0] => Method Specified is not Supported [L_SEVERITYCODE0] => Error ) Anyone knows what could be the problem? Regards, Andree.

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• Installing Rails 3 - /usr/local/bin/rails: No such file or directory

  - by viatropos

  I just ran these two commands: sudo gem install rails --pre sudo gem install railties --pre Now when I run rails myapp, I get this: -bash: /usr/local/bin/rails: No such file or directory Here's some system info: $ ruby -v ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin9.7.0] $ sudo gem update --system Updating RubyGems Nothing to update I tried copy/pasting the bin/rails file into /usr/local/bin/rails, and changing permissions to sudo chmod 755 /usr/local/bin/rails, but that doesn't work. Any ideas how to get up and running?

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• aspNetCompatibility WCF and WinForm

  - by user190084

  I would like to use Windows Forms with a WCF service and leverage the pre-built authentication of asp.net by using aspNetCompatibilityEnabled = true in the WCF service. Is there any module or pre-built assemblies that can add ASP.NET functionality to a Windows Forms application? As far as I understand, this functionality isn't built into Windows Forms and can't be leveraged.

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