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• Transitioning from Internal to Public Speaking

  - by TJB

  For whatever reason, I've always enjoyed giving presentations. As a developer, I've grown from giving the rare presentation when asked to frequently doing 'brown bag' talks and other presentations on new technology, projects etc. I'd like to expand as a presenter and start giving talks in public, outside of just my workplace, and I'm looking for tips on how to get there. At a high level, I'd love to know a good path to take & useful tips to help me grow from just giving internal talks to my group (10-20 people) to eventually be a presenter at medium-large sized conferences. Here are some specific questions, but I will take any advice you can offer: 1. How much experience do I need to speak at user groups etc? I've been in industry for around 5 years, which pales in comparison to most speakers that I normally see. 2. What is a good venue for my 1st public talk? 3. What surprises can I expect when transistioning from speaking to a small group of friends to presenting in public to strangers? I live in southern California and my background is mostly .net / web, so if you have any specific user group / venues those are also greatly appreciated.

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• Relationship between SOA and OOA

  - by TheSilverBullet

  Thomas Erl defines SOA as follows in his site: Service-oriented computing represents a new generation distributed computing platform. As such, it encompasses many things, including its own design paradigm and design principles, design pattern catalogs, pattern languages, a distinct architectural model, and related concepts, technologies, and frameworks. This definitely sounds like a whole new category which is parallel to object orientation. Almost one in which you would expect an entirely new language to exist for. Like procedural C and object oriented C#. Here is my understanding: In real life, we don't have entirely new language for SOA. And most application which have SOA architecture have an object oriented design underneath it. SOA is a "strategy" to make the entire application/service distributed and reliable. SOA needs OOPS working underneath it. Is this correct? Where does SOA (if at all it does) fit in with object oriented programming practices? Edit: I have learnt through answers that OOA and SOA work with each other and cannot be compared (in a "which is better" way). I have changed the title to "Relationship between SOA and OOA" rather than "comparison".

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• eSTEP Newsletter November 2011 now available

  - by uwes

  Dear Partners,We would like to inform you that the November issue of our Newsletter is now available.The issue contains informations to the following topics:Notes from Corporate: Magic Quadrant for Enterprise Application Servers, Oracle Buys RightNow Technical Corner: Oracle Solaris 11 – The First Cloud OS, Oracle Solaris 10 8/11 now available, New RAC/Containers certifications, DTrace and Container for Oracle Linux, Oracle Enterprise Manager Ops Center released, News from the Oracle Solaris Cluster, SPARC - New roadmap, T-Series Benchmarks Learning & Events: eSTEP Events Schedule, Recently Delivered TechCasts, Delivered Campaigns in 2011 How to ...: About Oracle Solaris Containers, Detailed feature comparison between the different versions of database 11g, Upgrade Advantage Program + table with examples, Sun Software Name ===> New Oracle Name, Oracle Linux and OVM Certification Search, TO YOUR ATTENTION - Repricing Servers and Xoptions You find the Newsletter on our portal under eSTEP News ---> Latest Newsletter. You will need to provide your email address and the pin below to get access. Link to the portal is shown below.URL: http://launch.oracle.com/PIN: eSTEP_2011Previous published Newsletters can be found under the Archived Newsletters section and more useful information under the Events, Download and Links tab. Feel free to explore and any feedback is appreciated to help us improve the service and information we deliver.Thanks and best regards,Partner HW Enablement EMEA

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• Virtualbox install 12.04 guest: "pae not present"

  - by Peter.O

  I get this message while trying to install Ubuntu 12.04 as a guest in VirutalBox 4.1.18, on an Ubuntu 10.04 host. This kernel requires the following feature not present on the CPU: pae Some host specs: The host's kernel is: Linux 2.6.32-41-generic-pae GNU/Linux lscpu (host): Architecture: i686, CPU op-mode(s): 32-bit, 64-bit grep --color=always -i PAE /proc/cpuinfo   does show pae in its output. The 12.04 iso used is: ubuntu-12.04.0-desktop-i386.iso As a comparison/check, I downloaded and installed Linux Mint 13 Cinnamon to the same host on the exact same VM (I just changed the .iso image). It worked fine. Its iso is: linuxmint-13-cinnamon-dvd-32bit.iso It seems (to me) that I have pae.. what is going on here? Update: I had assumed that Linux Mint also required pae (being Ubuntu based), but I've just run;   grep --color=always -i PAE /proc/cpuinfo   in the Mint VM.   It showed no output.   So it seems the issue may lie with VirtualBox.   If that is the case, how can I get Virtualbox into pae mode?

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• GUI based backup utility [closed]

  - by Chethan S.

  Possible Duplicate: Comparison of backup tools I have read favorable reviews for 'Back In Time' for the purpose stated above. Still I am posting this question as I have some demands in my mind. Few years back I was using ThinkVantage Rescue and Recovery by IBM on my Lenovo PC under Windows. That provided me nice features like compressed backups, boot time options - OS Repair, Restore entire OS, restore entire system to an older date, restore individual files etc. Out of these the feature I liked the most was compressed backups. Similar features are available in software like Norton Ghost too. In Back In Time I was surprised to see that the snapshot takes up same amount of space as that of the original contents, no compression at all. Furthermore, I was not able to find options to change the compression ratio etc. under settings. According to me compression of backups is a must have feature. Therefore, can anyone suggest me any other utility which can serve the purpose. I insist on GUI based tool since I don't want to mess up with backups!

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• What is a 'good number' of exceptions to implement for my library?

  - by Fuzz

  I've always wondered how many different exception classes I should implement and throw for various pieces of my software. My particular development is usually C++/C#/Java related, but I believe this is a question for all languages. I want to understand what is a good number of different exceptions to throw, and what the developer community expect of a good library. The trade-offs I see include: More exception classes can allow very fine grain levels of error handling for API users (prone to user configuration or data errors, or files not being found) More exception classes allows error specific information to be embedded in the exception, rather than just a string message or error code More exception classes can mean more code maintenance More exception classes can mean the API is less approachable to users The scenarios I wish to understand exception usage in include: During 'configuration' stage, which might include loading files or setting parameters During an 'operation' type phase where the library might be running tasks and doing some work, perhaps in another thread Other patterns of error reporting without using exceptions, or less exceptions (as a comparison) might include: Less exceptions, but embedding an error code that can be used as a lookup Returning error codes and flags directly from functions (sometimes not possible from threads) Implemented an event or callback system upon error (avoids stack unwinding) As developers, what do you prefer to see? If there are MANY exceptions, do you bother error handling them separately anyway? Do you have a preference for error handling types depending on the stage of operation?

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• Is there any kind of established architecture for browser based MMO games?

  - by black_puppydog

  I am beginning the development of a broser based game in which players take certain actions at any point in time. Big parts of gameplay will be happening in real life and just have to be entered into the system. I believe a good kind of comparison might be a platform for managing fantasy football, although I have virtually no experience playing that, so please correct me if I am mistaken here. The point is that some events happen in the program (i.e. on the server, out of reach for the players) like pulling new results from some datasource, starting of a new round by a game master and such. Other events happen in real life (two players closing a deal on the transfer of some team member or whatnot - again: have never played fantasy football) and have to be entered into the system. The first part is pretty easy since the game masters will be "staff" and thus can be trusted to a certain degree to not mess with the system. But the second part bothers me quite a lot, especially since the actions may involve multiple steps and interactions with different players, like registering a deal with the system that then has to be approved by the other party or denied and passed on to a game master to decide. I would of course like to separate the game logic as far as possible from the presentation and basic form validation but am unsure how to do this in a clean fashion. Of course I could (and will) put some effort into making my own architectural decisions and prototype different ideas. But I am bound to make some stupid mistakes at some point, so I would like to avoid some of that by getting a little "book smart" beforehand. So the question is: Is there any kind of architectural works that I can read up on? Papers, blogs, maybe design documents or even source code? Writing this down this seems more like a business application with business rules, workflows and such... Any good entry points for that?

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• Cuda driver, CPU/GPU performances issue

  - by elect

  I implemented a RNS Montgomery exponentiation in Cuda and on cpu for comparison. Everything nice everything fine. It runs on just one SM. However I am going to tell you some strange regression in both cpu/gpu performances. During the devoloping, about two month ago, I was using Cuda 5 preview on Ubuntu 11.04 64b. In this time, I reach the following performances: cpu 460ms gpu 120ms Then one day when I turn on the pc, the graphical environment didnt start. I dont know which was the problem, however I switched to the console and installed again the Cuda driver. At the following boot performances changed: cpu 310ms gpu 80ms I was like Q.Q...uhm ok, nice to see this, but I was wondering how that could be possible However, I went then in holiday for 10 days and I continued developing and optimizing on my notebook (but not the same part of the code, some additional stuff) When I was back, I just updated the source files, and performances came back to 460/120ms.. I couldnt believe it, I tried to install Cuda 5 RC, updating the video driver too... nothing changed... I checked Debug/Release, Cuda computability, but the problem seems being somewhere else.. Looking around the net I found this, I am pretty sure it must have something to do with the driver, because the performance change affected both cpu and gpu Do you have some tips/ideas/suggestions?

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• Nullable types and ?? operator C# [en-US]

  - by ruimachado

  Nullable types vs Non-nullable types   While developing our C# projects its frequent the null comparison operation to avoid null exceptions. This simple operation is mainly coded using the "var x = null" code example inside an if clause. However not all types of variables are nullable, which means that setting a variable to null is not allowed in every cases, it depends on what kind of type are you defining. But what if there was an extension to your non-nullable type that would convert your variable types to nullable? This extension really exists. As I said before in C# you have nullable types which represent all the values of an underlying type, and an additional null value and can be declared easily using "T?", where T is the type of the variable and for example the normal int type cannot be null, so its a non-nullable type, however if you define a "int?" your variable can be null, what you do is convert a non-nullable type to a nullable type. Example: int x=null;     Not allowed     int? x=null;   Allowed     While using nullable types you can check if a variable is null the same way you do it with nullable types:     But what about setting a default value when a certain variable is null?   In this cases the c# .net framework let you set a default value when you try to assign a nullable type to a non-nullable type, using the ?? operator. If you don't use this operator you can still catch the InvalidOperationException which is throw in this cases. For example  without the ?? operator :     Using the ?? operator your code becomes cleaner and more easy to read and you get a bonus, you can set a default value for multiple variables using the ?? in a chain set.     That’s it,   Thanks, Rui Machado rpmachado.wordpress.com

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• What are solutions and tradeoffs to maintain search result consistency in a web application

  - by iammichael

  Consider a web application with a custom search function that must display the results in a paged manner (twenty per page with up to hundreds of thousands of total results) and the ability to drill down to individual results that maintain next/previous links to navigate through the results. Re-executing the search on each page request to get the appropriate results for that page of data can be too expensive (up to 15s per search). Also, since the underlying data can change frequently (e.g. addition of new results), re-executing could cause the next/previous functionality to result in inconsistent behavior (e.g. the same results reappearing on a later page after having been viewed on an earlier page). What options exist to ensure the search results can be viewed across multiple pages in a consistent manner, and what tradeoffs does each option have in terms of network, CPU, memory, and storage requirements? EDIT: I thought caching the query search results was an obvious necessity. The question is really asking about where to cache the result set and what tradeoffs might exist to each. For example, storing the ids of the entities in the result set on the client, or storing the IDs of the entities themselves in the users session on the web server, or in a temporary table in the database. I'm not looking specifically for a single solution as different scenarios may result in different approaches (and such a question would be more suited for stackoverflow.com rather than here), but more of a design comparison between the possible approaches.

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• Clustering Strings on the basis of Common Substrings

  - by pk188

  I have around 10000+ strings and have to identify and group all the strings which looks similar(I base the similarity on the number of common words between any two give strings). The more number of common words, more similar the strings would be. For instance: How to make another layer from an existing layer Unable to edit data on the network drive Existing layers in the desktop Assistance with network drive In this case, the strings 1 and 3 are similar with common words Existing, Layer and 2 and 4 are similar with common words Network Drive(eliminating stop word) The steps I'm following are: Iterate through the data set Do a row by row comparison Find the common words between the strings Form a cluster where number of common words is greater than or equal to 2(eliminating stop words) If number of common words<2, put the string in a new cluster. Assign the rows either to the existing clusters or form a new one depending upon the common words Continue until all the strings are processed I am implementing the project in C#, and have got till step 3. However, I'm not sure how to proceed with the clustering. I have researched a lot about string clustering but could not find any solution that fits my problem. Your inputs would be highly appreciated.

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• What language available on commodity web hosts would suit a C# developer? [closed]

  - by billpg

  Recognising its ubiquity on commodity web hosting services, I tried developing in PHP a few years ago. I really didn't like it, later deciding that life was too short for PHP. (In brief, having to put $ on variable names; mis-spelt variable names become new variables; converting non-numeric strings to integers without complaint; the need for an "and this time I mean it" comparison operator.) In my ideal world, commodity web hosts would all support C#/ASP.NET, my preferred web-development language and framework, but this is not my ideal world. Even Mono has barely made a dent on Linux based hosts. However, last time I moaned about PHP's ubiquity, someone followed up that this was no longer the case, and that many other languages are now commonly usable on web hosts too. What programming language; a. Would suit a developer who prefers C#. b. Is available to run on many web hosts.

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• Why does there seem to be a lot of fear in choosing the "wrong" language to learn?

  - by Shewbox

  Perhaps its just me, but as a current CS student I have already come across many questions on this site and elsewhere about not just "Which language should I use for x?" but also "Does anyone still use language Y?" My first CS class was taught in Scheme, which, if I'm not mistaken, isn't used widely (at least in comparison to languages like Java, PHP, Python, etc). Many of my classmates balked at the idea of having to learn a language they would never have to use again, but I don't quite understand where so much of this fear of learning less popular languages comes from. No, I may not use Scheme in any job I get, but I certainly don't regret having learned to use it (albeit in a very beginner, not very in-depth manner in that one semester). I am taking a search engines class this semester, which is done in Perl and again I am seeing classmates complaining about the language choice. I can understand having a favorite language and disliking others but why do some get worked up over learning it in the first place? Can you really learn the "wrong" language? Isn't learning something like Scheme or Haskell good mental exercise if nothing else, and useful at least to exposure to different ways of solving problems?

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• Booting off a ZFS root in 14.04

  - by RJVB

  I've been running a Debian derivative (LMDE) on a ZFS root for half a year now. It was created by cloning a regular ext4-based install with all the necessary packages onto a ZFS pool, chrooting into that pool and recreating a grub menu and bootloader. The system uses an ext-3 dedicated /boot partition. I would like to do the same with Ubuntu 14.04, but have encountered several obstacles. There is no Trusty zfs-grub package The default grub package doesn't have ZFS support built in. I found a small bug in the build system responsible for that (report with patch created) and built my own grub packages. The built-in ZFS support is dysfunctional, it does not add the proper arguments to the kernel command line I thus installed the ZoL grub package I also use on my LMDE system, which does give me a correct grub.cfg However, even with that correct grub.cfg, the boot process apparently doesn't retrieve the bootfs parameter from the ZFS pool; instead the variable that's supposed to receive the value remains empty. As a result, initrd tries to load the default pool ("rpool"), which fails of course. I can however import the pool by hand, and complete the process by hand. If memory serves me well, I also had to disable apparmor, to avoid the boot process from blocking after importing the pool. Am I overlooking something? Just for comparison, I installed the Ubuntu 3.13 kernel on my LMDE system, and that works just fine (i.e. the identical kernel and grub binaries allow successful booting without glitches on LMDE but not on Ubuntu).

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• How do I cluster strings based on a relation between two strings?

  - by Tom Wijsman

  If you don't know WEKA, you can try a theoretical answer. I don't need literal code/examples... I have a huge data set of strings in which I want to cluster the strings to find the most related ones, these could as well be seen as duplicate. I already have a set of couples of string for which I know that they are duplicate to each other, so, now I want to do some data mining on those two sets. The result I'm looking for is a system that would return me the possible most relevant couples of strings for which we don't know yet that they are duplicates, I believe that I need clustering for this, which type? Note that I want to base myself on word occurrence comparison, not on interpretation or meaning. Here is an example of two string of which we know they are duplicate (in our vision on them): The weather is really cold and it is raining. It is raining and the weather is really cold. Now, the following strings also exist (most to least relevant, ignoring stop words): Is the weather really that cold today? Rainy days are awful. I see the sunshine outside. The software would return the following two strings as most relevant, which aren't known to be duplicate: The weather is really cold and it is raining. Is the weather really that cold today? Then, I would mark that as duplicate or not duplicate and it would present me with another couple. How do I go to implement this in the most efficient way that I can apply to a large data set?

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• NFS mount of /var/www to OS X

  - by ploughguy

  I have spent 2 hours trying to create an NFS mount from my Ubuntu 10.04 LTS server to my OS X desktop system. Objective: three way file compare between the code base on the Mac, the development system on the local Linux test system, and the hosted website. The hosted service uses cpanel so I can mount a webdisk - easy as pie - took 10 seconds. The local Ubuntu box, on the other hand - nothing but pain and frustration. Here is what I have tried: In File Browser, navigate to /var/www/site and right-click. Select share this folder. Enter sharename wwwsite and a comment. Click button "Create Share". Message says - you can only share file systems you own. There is a message on how to fix this, but the killer is that this is sharing by SMB. It will change the LFs to CR-LFs which will affect the file comparison. So forget this option. In a terminal window, run shares-admin (I have not been able to convince it to give me the "Shared Folders" option in the System Administration window - Maybe it is somewhere else in the menu, but I cannot find it) define an NFS export. Enter the path /var/www/site, select NFS enter the ip address of the iMac and save. On the mac, try to mount the file system using the usual methods - finder, command line "mount" command - not found. Nothing. Tried restarting the linux box in case there is a daemon that needs restarting - nothing. So I have run out of stuff to do. I have tried searching the documentation - it is pretty basic. The man page documentation is as opaque as ever. Please, oh please, will someone help me to get this @38&@^# thing to work! Thanks for reading this far... PG.

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• Recommended display/background brightness ratio and UI color schemes [duplicate]

  - by user1306322

  This question already has an answer here: Colour scheme for editor - guidelines or medical reccomendations 3 answers I'm a professional programmer, which means I spend a lot of time staring at various displays. Recently I've been having some problems with my eyes, so I went to talk to several doctors, which all gave me different recommendations as to how bright the background of the room should be in comparison to the display's brightness. It was very confusing, as some of them even agreed with counter-arguments of others, which made it all even less clear. So I'd like to ask the professional programmers, as people who actually have some experience with that. Some of the doctors said that looking at a monitor is like looking at a book, so the brightness ratios should be approximately the same. Others said that background should be as bright as the display itself, because then there is no brightness difference at the edges, and that's what may cause eye fatigue. From my own experience, I can say that reading a book isn't the same as writing or debugging a program, where you have to pay close attention to each symbol, and in books most words are easily recognizable without focusing too hard on them. Also, books are black on white and I myself use the default (dark text, white bg) color scheme for my IDE, but I've seen some programmers use mid-bright text on very dark background color schemes. So I'd like to ask what are the recommended display/background brightness ratios for programming? I'm not sure this site is the right one for this kind of questions, so if you know a better one, please comment.

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• Pros and Cons of Facebook's React vs. Web Components (Polymer)

  - by CletusW

  What are the main benefits of Facebook's React over the upcoming Web Components spec and vice versa (or perhaps a more apples-to-apples comparison would be to Google's Polymer library)? According to this JSConf EU talk and the React homepage, the main benefits of React are: Decoupling and increased cohesion using a component model Abstraction, Composition and Expressivity Virtual DOM & Synthetic events (which basically means they completely re-implemented the DOM and its event system) Enables modern HTML5 event stuff on IE 8 Server-side rendering Testability Bindings to SVG, VML, and <canvas> Almost everything mentioned is being integrated into browsers natively through Web Components except this virtual DOM concept (obviously). I can see how the virtual DOM and synthetic events can be beneficial today to support old browsers, but isn't throwing away a huge chunk of native browser code kind of like shooting yourself in the foot in the long term? As far as modern browsers are concerned, isn't that a lot of unnecessary overhead/reinventing of the wheel? Here are some things I think React is missing that Web Components will care of. Correct me if I'm wrong. Native browser support (read "guaranteed to be faster") Write script in a scripting language, write styles in a styling language, write markup in a markup language. Style encapsulation using Shadow DOM React instead has this, which requires writing CSS in JavaScript. Not pretty. Two-way binding

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• SourceMonitor Beta Test Version 3.3.2.261 now available

  - by TATWORTH

  Source Monitor is a useful independent utility for producing code metrics. Beta Test Version 3.3.2.261 has been released.Download and test Source Monitor beta (Version 3.3.2.261 - 2.30 MBytes)  via HTTP"The Beta page is at http://www.campwoodsw.com/smbeta.htmlHere is the official description of it>The freeware program Source Monitor lets you see inside your software source code to find out how much code you have and to identify the relative complexity of your modules. For example, you can use Source Monitor to identify the code that is most likely to contain defects and thus warrants formal review. Source Monitor, written in C++, runs through your code at high speed. Source Monitor provides the following: Collects metrics in a fast, single pass through source files.Measures metrics for source code written in C++, C, C#, VB.NET, Java, Delphi, Visual Basic (VB6) or HTML.Includes method and function level metrics for C++, C, C#, VB.NET, Java, and Delphi. Offers Modified Complexity metric option. Saves metrics in checkpoints for comparison during software development projects.Displays and prints metrics in tables and charts, including Kiviat diagrams.Operates within a standard Windows GUI or inside your scripts using XML command files.Exports metrics to XML or CSV (comma-separated-value) files for further processing with other tools.

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• What's is the point of PImpl pattern while we can use interface for same purpose in C++?

  - by ZijingWu

  I see a lot of source code which using PIMPL idiom in C++. I assume Its purposes are hidden the private data/type/implementation, so it can resolve dependence, and then reduce compile time and header include issue. But interface class in C++ also have this capability, it can also used to hidden data/type and implementation. And to hidden let the caller just see the interface when create object, we can add an factory method in it declaration in interface header. The comparison is: Cost: The interface way cost is lower, because you doesn't even need to repeat the public wrapper function implementation void Bar::doWork() { return m_impl->doWork(); }, you just need to define the signature in the interface. Well understand: The interface technology is more well understand by every C++ developer. Performance: Interface way performance not worse than PIMPL idiom, both an extra memory access. I assume the performance is same. Following is the pseudocode code to illustrate my question: // Forward declaration can help you avoid include BarImpl header, and those included in BarImpl header. class BarImpl; class Bar { public: // public functions void doWork(); private: // You doesn't need to compile Bar.cpp after change the implementation in BarImpl.cpp BarImpl* m_impl; }; The same purpose can be implement using interface: // Bar.h class IBar { public: virtual ~IBar(){} // public functions virtual void doWork() = 0; }; // to only expose the interface instead of class name to caller IBar* createObject(); So what's the point of PIMPL?

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• Database Insider - December 2012 issue

  - by Javier Puerta

  The December issue of the Database Insider newsletter is now available. (Full newsletter here) Big Data: From Acquisition to Analysis 2012 will likely be remembered as the year of big data, as a new generation of technologies enables organizations to acquire, organize, and analyze the exponentially growing and typically less-structured data generated from a variety of new sources. Oracle has produced a series of five short videos that offer a quick and compelling high-level introduction to big data. Read More Total Cost of Ownership Comparison: Oracle Exadata vs. IBM P-Series Read the research that found that over three years, the IBM hardware running Oracle Database cost 31 percent more in total cost of ownership than Oracle Exadata. Webcast - Oracle Exadata Database Machine X3 Learn about Oracle’s next-generation database machine, Oracle Exadata X3, that combines massive memory and low-cost disks to deliver the highest performance at the lowest cost. Available in an eight-rack configuration, it allows you to start small and grow.    Maximum Availability with Oracle GoldenGate Discover how to eliminate not only unplanned downtime but also planned downtime resulting from database upgrades, migrations, and consolidation.Thursday, December 1319:00 CET / 6 pm. UK   

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• Does (should?) changing the URI scheme name change the semantics?

  - by Doug

  If we take: http://example.com/foo is it fair to say that: ftp://example.com/foo .. points to the same resource, just using a different mechanism for resolving it (and of course possibly a different representation, but perhaps not)? This came to light in a discussion we were having surrounding some internal tooling with Git. We have to process some Git repositories, and they come to use as "git@{authority}/{path}" , however the library we're using to interface with them doesn't support the git protocol. I suggested that we should make the service robust in of that it tries to use HTTP or SSH, in essence, discovering what protocols/schemes are supported for resolving the repository at {path} under each {authority}. This was met with some criticism: "We don't know if that's the same repository". My response was: "It had better be!" Looking at RFC 3986, I see this excerpt: URI "resolution" is the process of determining an access mechanism and the appropriate parameters necessary to dereference a URI; this resolution may require several iterations. To use that access mechanism to perform an action on the URI's resource is to "dereference" the URI. Which makes me think that the resolution process is permitted to try different protocols, because: Although many URI schemes are named after protocols, this does not imply that use of these URIs will result in access to the resource via the named protocol. The only concern I have, I guess, is that I only see reference to the notion of changing protocols when it comes to traversing relationships: it is possible for a single set of hypertext documents to be simultaneously accessible and traversable via each of the "file", "http", and "ftp" schemes if the documents refer to each other with relative references. I'm inclined to think I'm wrong in my initial beliefs, because the Normalization and Comparison section of said RFC doesn't mention any way of treating two URIs as equivalent if they use different schemes. It seems like schemes named/based on IP protocols ought to have this notion, at least?

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• PHP Pear Installation on CentOS

  - by Prabhakar

  [root@ip ~]# yum install php-pear* Reducing CentOS-5 Testing to included packages only Finished Setting up Install Process Package 1:php-pear-1.8.1-2.el5.centos.noarch already installed and latest versio n Package php-pear-XML-Util is obsoleted by php-pear, trying to install 1:php-pear -1.8.1-2.el5.centos.noarch instead Package 1:php-pear-1.8.1-2.el5.centos.noarch already installed and latest versio n Package php-pear-DB is obsoleted by php-pear-db, trying to install php-pear-db-1 .7.13-2.el5.rf.noarch instead Resolving Dependencies --> Running transaction check ---> Package php-pear-Auth-RADIUS.noarch 0:1.0.6-1.el5 set to be updated --> Processing Dependency: php-pecl(radius) >= 1.2.5 for package: php-pear-Auth- RADIUS --> Processing Dependency: php-mcrypt for package: php-pear-Auth-RADIUS ---> Package php-pear-Auth-SASL.noarch 0:1.0.4-1.el5 set to be updated ---> Package php-pear-Benchmark.noarch 0:1.2.7-1.el5 set to be updated ---> Package php-pear-CAS.noarch 0:1.1.3-1.el5 set to be updated --> Processing Dependency: php-domxml-php4-php5 for package: php-pear-CAS ---> Package php-pear-Cache-Lite.noarch 0:1.7.5-1.el5 set to be updated ---> Package php-pear-CodeGen.noarch 0:1.0.7-3.el5 set to be updated ---> Package php-pear-CodeGen-PECL.noarch 0:1.1.3-3.el5 set to be updated ---> Package php-pear-Console-CommandLine.noarch 0:1.1.3-3.el5 set to be updated ---> Package php-pear-Console-Getargs.noarch 0:1.3.5-1.el5 set to be updated ---> Package php-pear-Console-ProgressBar.noarch 0:0.5.2-0.2.beta.el5 set to be updated ---> Package php-pear-Console-Table.noarch 0:1.1.1-1.el5 set to be updated ---> Package php-pear-Crypt-Blowfish.noarch 0:1.0.1-1.el5 set to be updated ---> Package php-pear-Crypt-CHAP.noarch 0:1.0.2-1.el5 set to be updated ---> Package php-pear-DB-DataObject.noarch 0:1.8.12-1.el5 set to be updated ---> Package php-pear-DB-DataObject-FormBuilder.noarch 0:1.0.0-1.el5 set to be u pdated ---> Package php-pear-DB-QueryTool.noarch 0:1.1.2-1.el5 set to be updated ---> Package php-pear-Date.noarch 0:1.4.7-2.el5.centos set to be updated ---> Package php-pear-Date-Holidays.noarch 0:0.21.4-1.el5 set to be updated ---> Package php-pear-Date-Holidays-USA.noarch 0:0.1.1-1.el5 set to be updated ---> Package php-pear-Event-Dispatcher.noarch 0:1.1.0-1.el5 set to be updated ---> Package php-pear-File.noarch 0:1.2.2-1.el5.centos set to be updated ---> Package php-pear-File-Find.noarch 0:1.3.0-1.el5 set to be updated ---> Package php-pear-File-Passwd.noarch 0:1.1.7-1.el5 set to be updated ---> Package php-pear-File-SMBPasswd.noarch 0:1.0.3-1.el5 set to be updated ---> Package php-pear-HTML-Common.noarch 0:1.2.5-1.el5 set to be updated ---> Package php-pear-HTML-QuickForm.noarch 0:3.2.12-1.el5 set to be updated ---> Package php-pear-HTML-QuickForm-ElementGrid.noarch 0:0.1.1-1.el5 set to be updated ---> Package php-pear-HTML-QuickForm-advmultiselect.noarch 0:1.4.1-1.el5 set to be updated ---> Package php-pear-HTML-Table.noarch 0:1.7.5-1.el5 set to be updated ---> Package php-pear-HTML-Template-IT.noarch 0:1.3.0-2.el5 set to be updated ---> Package php-pear-HTML_Template_PHPLIB.noarch 0:1.4.0-2.el5 set to be update d ---> Package php-pear-HTTP.noarch 0:1.4.0-7.el5 set to be updated ---> Package php-pear-HTTP-Client.noarch 0:1.1.1-1.el5 set to be updated ---> Package php-pear-HTTP-Request.noarch 0:1.4.4-1.el5 set to be updated ---> Package php-pear-HTTP-Upload.noarch 0:0.9.1-2.el5 set to be updated ---> Package php-pear-Image-Canvas.noarch 0:0.3.1-1.el5 set to be updated ---> Package php-pear-Image-Color.noarch 0:1.0.3-1.el5 set to be updated ---> Package php-pear-Image-Graph.noarch 0:0.8.0-1.el5 set to be updated ---> Package php-pear-Image-GraphViz.noarch 0:1.2.1-4.el5 set to be updated --> Processing Dependency: graphviz for package: php-pear-Image-GraphViz ---> Package php-pear-Log.noarch 0:1.12.7-1.el5 set to be updated ---> Package php-pear-MDB2.noarch 0:2.4.1-2.el5.centos set to be updated ---> Package php-pear-MDB2-Driver-mysql.noarch 0:1.4.1-3.el5.centos set to be up dated ---> Package php-pear-MDB2-Driver-pgsql.noarch 0:1.4.1-1.el5 set to be updated ---> Package php-pear-MDB2-Schema.noarch 0:0.8.0-2.el5 set to be updated ---> Package php-pear-Mail.noarch 0:1.1.14-5.el5.1 set to be updated ---> Package php-pear-Mail-Mime.noarch 0:1.4.0-1.el5.centos set to be updated ---> Package php-pear-Math-Stats.noarch 0:0.9.0-0.1.beta3.el5 set to be updated ---> Package php-pear-Net-Curl.noarch 0:1.2.5-1.el5 set to be updated ---> Package php-pear-Net-DIME.noarch 0:1.0.1-1.el5 set to be updated ---> Package php-pear-Net-FTP.noarch 0:1.3.4-1.el5 set to be updated ---> Package php-pear-Net-POP3.noarch 0:1.3.7-1.el5 set to be updated ---> Package php-pear-Net-Ping.noarch 0:2.4.5-1.el5 set to be updated ---> Package php-pear-Net-SMTP.noarch 0:1.4.4-1.el5 set to be updated ---> Package php-pear-Net-Sieve.noarch 0:1.3.2-1.el5 set to be updated ---> Package php-pear-Net-Socket.noarch 0:1.0.10-1.el5 set to be updated ---> Package php-pear-Net-Traceroute.noarch 0:0.21.3-1.el5 set to be updated ---> Package php-pear-Net-URL.noarch 0:1.0.15-1.el5.centos set to be updated ---> Package php-pear-Net-URL-Mapper.noarch 0:0.9.0-2.el5.1 set to be updated ---> Package php-pear-Net-URL2.noarch 0:0.3.0-1.el5 set to be updated ---> Package php-pear-Net-UserAgent-Detect.noarch 0:2.5.2-1.el5 set to be update d ---> Package php-pear-Numbers-Roman.noarch 0:1.0.2-2.el5 set to be updated ---> Package php-pear-Numbers-Words.noarch 0:0.16.1-1.el5 set to be updated ---> Package php-pear-OLE.noarch 0:1.0.0-0.4.rc1.el5 set to be updated ---> Package php-pear-PHP-CodeSniffer.noarch 0:1.2.2-1.el5 set to be updated ---> Package php-pear-PHP-Compat.noarch 0:1.5.0-1.el5 set to be updated ---> Package php-pear-PHP-CompatInfo.noarch 0:1.4.3-1.el5 set to be updated ---> Package php-pear-PHPUnit.noarch 0:3.3.5-2.el5 set to be updated --> Processing Dependency: php-pecl(Xdebug) >= 2.0.0 for package: php-pear-PHPUn it --> Processing Dependency: php-channel(pear.phpunit.de) for package: php-pear-PH PUnit ---> Package php-pear-Pager.noarch 0:2.4.8-1.el5 set to be updated ---> Package php-pear-Payment-Process.noarch 0:0.6.6-1.el5 set to be updated ---> Package php-pear-Phlickr.noarch 0:0.2.7-2.el5 set to be updated ---> Package php-pear-PhpDocumentor.noarch 0:1.4.3-1.el5 set to be updated --> Processing Dependency: php-Smarty >= 2.6.0 for package: php-pear-PhpDocument or ---> Package php-pear-PhpDocumentor-docs.noarch 0:1.4.3-1.el5 set to be updated ---> Package php-pear-SOAP.noarch 0:0.11.0-2.el5 set to be updated ---> Package php-pear-Spreadsheet-Excel-Writer.noarch 0:0.9.2-2.el5 set to be up dated ---> Package php-pear-Structures-DataGrid.noarch 0:0.8.3-1.el5 set to be updated ---> Package php-pear-Structures-DataGrid-DataSource-Array.noarch 0:0.1.3-1.el5 set to be updated ---> Package php-pear-Structures-DataGrid-DataSource-DataObject.noarch 0:0.1.2-1 .el5 set to be updated ---> Package php-pear-Structures-DataGrid-DataSource-MDB2.noarch 0:0.1.10-1.el5 set to be updated ---> Package php-pear-Structures-DataGrid-DataSource-RSS.noarch 0:0.1.1-1.el5 se t to be updated ---> Package php-pear-Structures-DataGrid-Renderer-Pager.noarch 0:0.1.2-1.el5 se t to be updated ---> Package php-pear-Text-Diff.noarch 0:1.1.0-1.el5 set to be updated ---> Package php-pear-Validate.noarch 0:0.8.3-1.el5 set to be updated ---> Package php-pear-Validate-Finance-CreditCard.noarch 0:0.5.2-1.el5 set to be updated ---> Package php-pear-Var-Dump.noarch 0:1.0.3-2.el5 set to be updated ---> Package php-pear-XML-Beautifier.noarch 0:1.1-3.el5 set to be updated ---> Package php-pear-XML-Parser.noarch 0:1.2.8-1.el5 set to be updated ---> Package php-pear-XML-RSS.noarch 0:1.0.0-1.el5 set to be updated ---> Package php-pear-XML-Serializer.noarch 0:0.20.0-1.el5 set to be updated ---> Package php-pear-date.noarch 0:1.4.6-1.el5.rf set to be updated ---> Package php-pear-db.noarch 0:1.7.13-2.el5.rf set to be updated ---> Package php-pear-excel.noarch 0:0.9.0-1.el5.rf set to be updated ---> Package php-pear-file.noarch 0:1.2.2-1.el5.rf set to be updated ---> Package php-pear-log.noarch 0:1.9.3-1.el5.rf set to be updated ---> Package php-pear-mail_mime.noarch 0:1.3.1-1.el5.rf set to be updated ---> Package php-pear-ole.noarch 0:0.5-2.el5.rf set to be updated --> Running transaction check ---> Package graphviz.i386 0:2.22.0-4.el5.rf set to be updated ---> Package php-Smarty.noarch 0:2.6.26-1.el5 set to be updated ---> Package php-channel-phpunit.noarch 0:1.0-2.el5 set to be updated ---> Package php-domxml-php4-php5.noarch 0:1.21.2-1.el5 set to be updated ---> Package php-mcrypt.i386 0:5.2.9-2.el5.centos.3 set to be updated --> Processing Dependency: php-api = 20041225 for package: php-mcrypt ---> Package php-pecl-radius.i386 0:1.2.5-4.el5 set to be updated --> Processing Dependency: php-api = 20041225 for package: php-pecl-radius ---> Package php-pecl-xdebug.i386 0:2.0.5-1.el5.1 set to be updated --> Processing Dependency: php-api = 20041225 for package: php-pecl-xdebug --> Finished Dependency Resolution php-pecl-xdebug-2.0.5-1.el5.1.i386 from epel has depsolving problems --> Missing Dependency: php-api = 20041225 is needed by package php-pecl-xdebu g-2.0.5-1.el5.1.i386 (epel) php-pecl-radius-1.2.5-4.el5.i386 from epel has depsolving problems --> Missing Dependency: php-api = 20041225 is needed by package php-pecl-radiu s-1.2.5-4.el5.i386 (epel) php-mcrypt-5.2.9-2.el5.centos.3.i386 from c5-testing has depsolving problems --> Missing Dependency: php-api = 20041225 is needed by package php-mcrypt-5.2 .9-2.el5.centos.3.i386 (c5-testing) Error: Missing Dependency: php-api = 20041225 is needed by package php-pecl-radi us-1.2.5-4.el5.i386 (epel) Error: Missing Dependency: php-api = 20041225 is needed by package php-mcrypt-5. 2.9-2.el5.centos.3.i386 (c5-testing) Error: Missing Dependency: php-api = 20041225 is needed by package php-pecl-xdeb ug-2.0.5-1.el5.1.i386 (epel) You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest The program package-cleanup is found in the yum-utils package.

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• MSMQ messages using HTTP just won't get delivered

  - by John Breakwell

  I'm starting off the blog with a discussion of an unusual problem that has hit a couple of my customers this month. It's not a problem you'd expect to bump into and the solution is potentially painful. Scenario You want to make use of the HTTP protocol to send MSMQ messages from one machine to another. You have installed HTTP support for MSMQ and have addressed your messages correctly but they will not leave the outgoing queue. There is no configuration for HTTP support - setup has already done all that for you (although you may want to check the most recent "Installation of the MSMQ HTTP Support Subcomponent" section of MSMQINST.LOG to see if anything DID go wrong) - so you can't tweak anything. Restarting services and servers makes no difference - the messages just will not get delivered. The problem is documented and resolved by Knowledgebase article 916699 "The message may not be delivered when you use the HTTP protocol to send a message to a server that is running Message Queuing 3.0". It is unlikely that you would be able to resolve the problem without the assistance of PSS because there are no messages that can be seen to assist you and only access to the source code exposes the root cause. As this communication is over HTTP, the IIS logs would be a good place to start. POST entries are logged which show that connectivity is working and message delivery is being attempted: #Software: Microsoft Internet Information Services 6.0 #Version: 1.0 #Date: 2006-09-12 12:11:29 #Fields: date time s-sitename s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc-win32-status 2006-09-12 12:12:12 W3SVC1 10.1.17.219 POST /msmq/private$/test - 80 - 10.2.200.3 - 200 0 0 If you capture the traffic with Network Monitor you can see the POST being sent to the server but you also see a response being returned to the client: HTTP: Response to Client; HTTP/1.1; Status Code = 500 - Internal Server Error "Internal Server Error" means we can probably stop looking at IIS and instead focus on the Message Queuing ISAPI extension (Mqise.dll). MSMQ 3.0 (Windows XP and Windows Server 2003) comes with error logging enabled by default but the log files are in binary format - MSMQ 2.0 generated logging in plain text. The symbolic information needed for formatting the files is not currently publicly available so log files have to be sent in to Microsoft PSS.  Although this does mean raising a support case, formatting the log files to text and returning them to the customer shouldn't take long. Obviously the engineer analyses them for you - I just want to point out that you can see the logging output in text format if you want it. The important entries in the log for this problem are: [7]b48.928 09/12/2006-13:20:44.552 [mqise GetNetBiosNameFromIPAddr] ERROR:Failed to get the NetBios name from the DNS name, error = 0xea [7]b48.928 09/12/2006-13:20:44.552 [mqise RPCToServer] ERROR:RPC call R_ProcessHTTPRequest failed, error code = 1702(RPC_S_INVALID_BINDING) which allow a Microsoft escalation engineer to check the MQISE source code to see what is going wrong. This problem according to the article occurs when the extension tries to bind to the local MSMQ service after the extension receives a POST request that contains an MSMQ message. MSMQ resolves the server name by using the DNS host name but the extension cannot bind to the service because the buffer that MSMQ uses to resolve the server name is too small - server names that are exactly 15 characters long will not fit. RPC exception 0x6a6 (RPC_S_INVALID_BINDING) occurs in the W3wp.exe process but the exception is handled and so you do not receive an error message. The workaround is to rename the MSMQ server to something less than 15 characters. If the problem has only just been noticed in a production environment - an application may have been modified to get through a newly-implemented firewall, for example - then renaming is going to be an issue. Other applications may need to be reinstalled or modified if server names are hard-coded or stored in the registry. The renaming may also break a company naming convention where the name is built up from something like location+department+number. If you want to learn more about MSMQ logging then check out Chapter 15 of the MSMQ FAQ. In fact, even if you DON'T want to learn anything about MSMQ logging you should read the FAQ anyway as there is a huge amount of useful information on known issues and the like.

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• Oracle HRMS API – Delete Employee Element Entry

  - by PRajkumar

  API --  pay_element_entry_api.delete_element_entry    Example -- Consider Employee has Element Entry "Bonus". Lets try to Delete Element Entry "Bonus" using delete API     DECLARE       ld_effective_start_date            DATE;       ld_effective_end_date             DATE;       lb_delete_warning                   BOOLEAN;       ln_object_version_number    PAY_ELEMENT_ENTRIES_F.OBJECT_VERSION_NUMBER%TYPE := 1; BEGIN       -- Delete Element Entry       -- -------------------------------         pay_element_entry_api.delete_element_entry         (    -- Input data elements              -- ------------------------------              p_datetrack_delete_mode    => 'DELETE',              p_effective_date                      => TO_DATE('23-JUNE-2011'),              p_element_entry_id               => 118557,              -- Output data elements              -- --------------------------------              p_object_version_number   => ln_object_version_number,              p_effective_start_date           => ld_effective_start_date,              p_effective_end_date            => ld_effective_end_date,              p_delete_warning                  => lb_delete_warning         );    COMMIT; EXCEPTION         WHEN OTHERS THEN                           ROLLBACK;                           dbms_output.put_line(SQLERRM); END; / SHOW ERR;  

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