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• Visual Studio 2010 Is Here!

  - by Bill Evjen

  I think back to the days of the first versions of Visual Studio (when it was called Visual Studio .NET, remember?) and I think about how far Microsoft has come with this IDE. It really is the best IDE on the market. There is so much to this IDE it is amazing. It now can really handle managing your complete software application development lifecycle. For me, it is (besides Windows 7) the best and most successful product Microsoft has developed. You can obviously get this now and it is available on MSDN and some other places: MSDN Visual Studio Trial Editions Visual Studio 2010 Express Editions (free) You will also find great info at the Visual Studio Developer Center. Some other interesting tidbits of info: JetBrain’s ReSharper 5.0 has been released for VS2010 Oracle will have the new Oracle Dev Tools for VS2010 within one month - http://bit.ly/9gC9NE Visual Studio 64-bit - Why there is no 64-bit version of VS - http://bit.ly/dhhwAj In installing this version of Visual Studio, if you have been working on the previous RC builds, then you are going to want to uninstall these previous editions of the 2010 product. You can do this through the Add Remove Programs dialog and you are going to want to select the appropriate item from the long list of Visual Studio items. You are then going to want to step through the Visual Studio dialog (it will seem as if you are installing it again) – and you will then come to a point where you can select the option to Uninstall the entire application. If you have installed the Silverlight 4 RC stuff, then you are also going to want to uninstall this and you are also going to want to uninstall the “Update for Visual Studio 2010 (KB976272)” before installing Silverlight RC2 – which you can find on www.silverlight.net. Technorati Tags: vs2010,.net,visualstudio,microsoft

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• Cannot seem to disable ability to view temporary internet files via group policy

  - by user162707

  Windows XP Pro SP3, IE8 (8.0.6001.18702), within local gpedit.msc I did the below: User Config/Admin Temp/Windows Comp/IE enabled: disable changing temporary internet file settings User Config/Admin Temp/Windows Comp/IE/Delete Browsing History enabled all (11 items) However there is a loophole that lets me still wipe history & other files via: Tools, Internet Options, Browsing History, Settings, View Objects, delete everything, hit up arrow, go to History (hidden folders has to be on), delete everything Only way around this I can see is to disable General Internet Options Page via group policy, setup NTFS folder restrictions on that temp internet files (worried about adverse affects like not being able to store them), or further grind-down group policy somewhere else to prevent deleting files. Just odd group policy wouldn't have a settings to simply disable the Browser History Settings button (as it further shows the location which a user could just go to). So just curious if someone can confirm maybe this is simply not available in group policy & their suggested action

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• php.ini use multiple include paths - openbasedir restriction

  - by hfidgen

  I need to allow an include path for a vhost subdomain on Plesk 10. I've edited the PHP PEAR path into /etc/php.ini as I'm happy for it to be globally available: include_path = ".:/usr/share/pear/" This works insofar as PHP is able to see the files in that directory when a script tries to include them, but I'm getting the dreaded openbasedir error: Warning: require_once() [function.require-once]: open_basedir restriction in effect. File(/usr/share/pear/xxxx.php) is not within the allowed path(s): (/var/www/vhosts/xxxx.com/subdomains/test/httpdocs/:/tmp/) Am I right in saying that the subdomain or main domain can have a vhost.conf file in which I can alter the openbasedir allowed paths? I've tried searching out solutions but I'm afraid I can't quite see one yet :)

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• How to align text at the top left-hand corner?

  - by OverTheRainbow

  I'd like to use stylesheet instead of hard-coding HTML so that text within cells are aligned vertically, ie. text starts at the upper left-hand corner. However, neither of this works: <head> <link rel="STYLESHEET" href="display.css" type="text/css"> <style> td {vertical-align:top; font-size:x-small} td {vertical-align:text-top; font-size:x-small} </style> </head> Does someone know? Thank you. Edit: Problem solved. Turns out the HTML editor I'm using is a bit old and didn't display things as expected, but they do show OK in a modern browser with "vertical-align:top".

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• Portal and Content - Components, part 3 – Applied Customization Framework (4 of 7)

  - by Stefan Krantz

  Have you ever been challenged with the situation where your work task asks you to implement functionality in the WebCenter Portal and you browse through the Resource Catalog (Business Dictionary) and find the functionality you need. However when you get started there is small short comings and you ask your self- how can I re-use what is out of the box ca?- I wonder what code I need to use to produce the similar functions and include my new requirements?- Must I write a new taskflow? The answer to above questions are in many times answered with simply you can  do a taskflow customization to out-of-the-box taskflows. In this post I will help you understand how to do such customization. Best described is a 4 step process, see image flow below for illustration: Just to clarify few naming confusions that might occur when go through above process. Customization Role is a function within JDeveloper that will allow you to implement view and flow customizations to existing taskflows WebCenter Portal – Spaces Taskflow Customization Framework this technology scope do not only refer to WebCenter Spaces, this also include WebCenter Portal/Framework A taskflow customization do not overwrite or replace any code, it just creates an additional tip view of the taskflow in the MDS for the current application (WebCenter Portal or WebCenter Spaces) To sum up this simple procedure I also like to help you find your way around the main topic for this post series, this post series is focusing primarily on Content integration with WebCenter Portal, so where can I find content related taskflows in the WebCenter Libraries. The list below mention some useful locations to taskflows and each taskflow page fragments. Library Reference - WebCenter Document Library Service View Content Presenter Path: oracle.webcenter.doclib.view.jsf.taskflows.presenterTaskflow: contentPresenter.xml - The Content Presenter taskflowTaskflow: contentPresenterWizard.xml - The publishing wizard to select content, select template and preview including contributionDocument Manager Path: oracle.webcenter.doclib.view.jsf.taskflows.docManager Taskflow: documentManager.xml - The Document Manager taskflow which includes references to document management feature including browsing, download, uploading and viewing. For more information on Taskflow customizations please see following documentation:http://docs.oracle.com/cd/E23943_01/webcenter.1111/e10148/jpsdg_taskflows.htm#BACIEGJD

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• Open World Session - BPM, SOA and ADF Combined:Patterns learned from Fusion Applications

  - by mesriniv

  Blog by Meera Srinivasan (Oracle Product Management) Today afternoon (10/2/2012), Mohan Kamath, and I (Meera Srinivasan) delivered an Open World session on how Oracle Fusion Applications (the next generation business applications from Oracle), use Oracle BPM, Oracle SOA and Oracle ADF products. These adoption patterns can be applied in a generic manner to produce process-centric, user-centric, highly customizable and extensible next generation application. The session was well attended and we had lively discussions with the attendees during Q & A. We started with why as an application developer, you should look at BPM for creating a process-centric application and presented the following fusion adoption patterns Model driven agile development Customization and Extension Guided Process Interactions Personalization and Customization of End User Interfaces Approval Flows Fusion HCM, On Boarding Process - Activity Guide Interface was used as an example for the Guided Process Interactions adoption pattern and the Fusion CRM BPM Process Templates for Customization adoption pattern. In the Personalization and Customization of End User Interfaces section, we looked at how ADF is used within Oracle BPM and the various options available to customize end user interfaces. We also presented how Oracle Procurement does complex approvals using Rules and Approval Management Extensions. We hope you found the session useful, and please do try to attend Heidi’s session on dynamic case management: Case Management Patterns with Oracle Unified Business Process Management Suite. Marriott Marquis - Salon 7, Thu 11:15 AM - 12:15 PM

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• FAVICON: Favicon now showing up

  - by Russ

  I'm using a .png favicon file and it is not showing up on my site. Doing a grep, I see the following in home.htm which looks right for me(I have also confirmed it's in the HEAD section within home.htm): home.htm: <link rel="shortcut icon" type="image/png" href="favicon.png"> The favicon.png file is in the same directory as the home.html file. Any suggestions are welcome! Thanks all. In case the file info is revealing for anyone, I'll attach it here:

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• Alternate port numbers for Supermicro IPMI View software

  - by MC9000

  I'm using the IPMI View software to manage a SuperMicro server but would like to use alternate port #s within the program itself. In other words - If I use the web browser, it defaults to port 80 - While I can, say change that port to 12345 (or whatever) and type the IP address into the browser (like http://xxx.xxx.xxx.xxx:12345 ) that works just fine. However, in IPMIView, it will assume port 80 and load the browser with the IP (which, naturally, won't work, so I have to manually type in the alternate port #). I can deal with that. The clincher is if I use a port other than 623 for management - (say 55623 for example), the IPMIView will not find it. Same goes for the iKVM port #. Is there some place to specify this (to tell IPMIView to use the alternate port numbers), like a settings file? I'm running this from a Windows client.

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• Creating hard drive backup images efficiently

  - by Arrieta

  We are in the process of pruning our directories to recuperate some disk space. The 'algorithm' for the pruning/backup process consists of a list of directories and, for each one of them, a set of rules, e.g. 'compress *.bin', 'move *.blah', 'delete *.crap', 'leave *.important'; these rules change from directory to directory but are well known. The compressed and moved files are stored in a temporary file system, burned onto a blue ray, tested within the blue ray, and, finally, deleted from their original locations. I am doing this in Python (basically a walk statement with a dictionary with the rules for each extension in each folder). Do you recommend a better methodology for pruning file systems? How do you do it? We run on Linux.

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• Internship in License Contract Management

  - by cristian.condurache(at)oracle.com

  Hi Everyone, My name is Luca. I am an intern in the License Contract Management team in Italy. I have studied Economics and Business in Pescara and finished my Master’s Degree in July 2009. After a short work experience near my home town I decided to look for a job in an International Company. I got in touch with Oracle in January 2010. I had a telephone interview and then a face-to-face interview. On a cold and grey morning, I arrived in Milan....my first impression was fantastic....a big modern building with wide TVs everywhere. I was a little nervous but very excited. I understood this could be a great opportunity... The interview went well and I started to work in March. After a training period I was quickly involved in the closing of the last quarter of the fiscal year - of which May is the last month at Oracle. Working as a License Contract Manager is a real challenge for a fresh graduate. It involves thoroughly understanding the Oracle Policies and Practices with regards to License Contracts. In my experience, especially in May, I learnt to work under high pressure, within time constrains, and to keep up with constant changes. In this period I also had the opportunity to be involved in different negotiations, being directly in contact with the customers. This helped me to develop my relational skills during complex transactions. Looking back at the nine months at Oracle I can say I have a better understanding of the IT world. It is a complex environment that changes continously, offering new challenges to learn from everytime. If you have any questions related to this article feel free to contact [email protected]. You can find our job opportunities via http://campus.oracle.com. Technorati Tags: License Contract Management,oppotunity,Oracle Policies,internship

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• Long term plan of attack to learn math?

  - by zhenka

  I am a web-developer with a desire to expand my skill-set to mathematics relevant to programming. As 2nd career, I am stuck in college doing some of the requirements while working. I was hoping the my education will teach me the needed skills to apply math, however I am quickly finding it to be too much easily-testable breadth-based approach very inefficient for the time invested. For example in my calculus 2 class, the only remotely useful mind expanding experience I had was volumes and areas under the curve. The rest was just monotonous glorified algebra, which while comes easy to me, could be done by software like wolfram alpha within seconds. This is not my idea of learning math. So here I am a frustrated student looking for a way to improve my understanding of math in a way that focuses on application, understanding and maximally removed needless tedium. However I cannot find a good long term study strategy with this approach in mind. So for those of like mind, how would you go about learning the necessary math without worrying too much about stuff a computer can do much better?

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• Adding Ubuntu installation to VIsta boot loader

  - by frapfap

  Hi, I had a Vista partition and created a partition and installed Ubuntu 9.10. During the Ubuntu installation I unchecked "Install Boot Loader" so it didn't install the GRUB bootloader. I wanted to keep Vistas boot loader so I could manage it within Vista as I know you can - Ive just forgot where in the Control Panel you do it! Anyway for some reason I incorrectly assumed that the Ubuntu entry would be added to the Vista boot loader. How do enable to choose which OS to use during booting up the computer as at the moment it just automatically loads Vista? Apologies if I'm technically incorrect - what I explained is what I thought was going on!! Thanks.

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• How do I account for changed or forgotten tasks in an estimate?

  - by Andrew

  To handle task-level estimates and time reporting, I have been using (roughly) the technique that Steve McConnell describes in Chapter 10 of Software Estimation. Specifically, when the time comes for me to create task-level estimates (right before coding begins on a project), I determine the tasks at a fairly granular level so that, whenever possible, I have no tasks with a single-point, 50%-confidence estimate greater than four hours. That way, the task estimation process helps with constructing the software while helping me not to forget tasks during estimation. I come up with a range of hours possible for each task also, and using the statistical calculations that McConnell describes along with my historical accuracy data, I can generate estimates at other confidence levels when desired. I feel like this method has been working fairly well for me. We are required to put tasks and their estimates into TFS for tracking, so I use the estimates at the percentage of confidence I am told to use. I am unsure, however, what to do when I do forget a task, or I end up needing to do work that does not neatly fall within one of the tasks I estimated. Of course, trying to avoid this situation is best, but how do I account for forgotten/changed tasks? I want to have the best historical data I can to help me with future estimates, but right now, I basically am just calculating whether I made the 50%-confidence estimate and whether I made it inside the ranged estimate. I'll be happy to clarify what I'm asking if needed -- let me know what is unclear.

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• Spirent Communications Improves Customer Experience with Knowledge Management

  - by Tony Berk

  Spirent Communications plc is a global leader in test and measurement inspiring innovation within development labs, communication networks and IT organizations. The world’s leading communications companies rely on Spirent to help design, develop, validate, and deliver world-class network, devices, and services. Spirent’s customers require high levels of support for a diverse and complex product portfolio, and the company is committed to delivering on this requirement. Spirent needed a solution to help its customers get the information they need quickly and at their convenience through its Web site. After evaluating several solutions, Spirent selected and deployed Oracle Knowledge for Web Self Service Enterprise Edition. Oracle Knowledge Management uses natural language processing to understand the true intent of each inquiry logged via the support portal’s search function. The Spirent Knowledge Base on the company’s Customer Support Center (CSC) finds the best possible answer using search enhancement features?such as communications industry-specific libraries and federation to search external sources. Spirent has reduced contact center call volume while better serving its customers. Each time a customer uses the knowledge base, they find answers faster than by calling, and it saves Spirent an average of US$210 per call?which is significant when multiplied across the thousands of calls received monthly. Oracle Knowledge also helps support engineers find answers more quickly, enabling the company to scale without adding additional support engineers. Oracle Knowledge is integrated with Spirent's Siebel Contact Center implementation to provide an integrated desktop for CRM and agent intelligence, avoiding the need for contact center personnel to toggle between various screens to address customer inquiries, thereby accelerating customer service. Click here to learn more about Sprient's use of Siebel CRM and Oracle Knowledge Management.

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• Is there a way of disabled byte-range requests in Apache?

  - by Sam Minnée

  I have a web page with a link to a PDF file (target="_blank"). If I click the link, the PDF reader just shows a grey screen within the Firefox browser. If I copy that link and manually open it in a new tab, the PDF will display correctly, and subsequent requests made by clicking the original link now work, suggesting that the problem occurs when loading the file into the cache. It appears as though the Adobe PDF reader plugin is making byte-range requests (I see lots of 206 responses) and I suspect that this may be the cause of the issue. I am running an Apache webserver. Has anyone had problems with Apache and Adobe's byte-range requests? Are there any workarounds? Perhaps a way of configuring Apache to ignore byte-range requests on PDFs?

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• Using Vim on the ipad... Any tips?

  - by pax1728

  I'm itching to program on my ipad. With the iSSH app I was able to log on to my university's server and even open an X server window. Unfortunately, the experience within iSSH is still rather clumsy. When using vim, the bottom line is hidden by the keyboard. Does anyone have any experience with SSH connections and the ipad or iphone? Are there better applications to use? I would prefer not to jailbreak my ipad.

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• What would be the level of effort required to implement a screencapture command on a PS3 game?

  - by Sean Scott

  Looking to see what the level of effort is for implementing a screen capture command into PS3 game by a mid-level PS3 game developer. Bonus for a description of what is involved in the process... EDIT Not sure how to get back my question since it was the first but let me clarify some things. @Nate Bross, nope I am not the actor although i've fielded calls for him on occasion @coderanger my intent was to try and speak to other PS3 developers, however coming from a web development no one in my social circle close or extended develops on the PS3. Additionally i'm interested in hearing the effort required in terms of hours so that this information can be passed on to a client. A client who has a game on the PS3 using the unreal engine. Convo with devs sometimes go something like "can you implement feature a" which gets a response "this will take us 8 weeks and an army". Trying to be educated before the ask. I hope that helps If anyone here is a PS3 game dev and would like to respond off site so as not to break NDA that would be awesome. @Roger it would be from within the game, something that users can use. Something akin to the iphone screencap utility. No need to get fancier than that.

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• Change Windows Server 2012 color scheme without Desktop Experience feature

  - by Fez Vrasta

  I have a Windows Server 2012, blue is nice... but I'd prefer a less "eyes puncher" color, maybe gray or black... I'm a GNU/Linux sysadmin and just the fact of have the entire GUI on a server is difficult for me, so I would avoid to install the Desktop Experience feature just to change the color of the GUI. I have read here: How to change color scheme in Windows Server 2012 That once I've changed color I may remove the Desktop Experience feature and the color will not be reverted to the original. So I guess there must be a way to change the color without install this feature pack, because looks like it just adds the control panel to set the color, but not the core feature, that maybe could be accessible within some registry key. Does someone have some idea?

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• How to keep your third party libraries up to date?

  - by Joonas Pulakka

  Let's say that I have a project that depends on 10 libraries, and within my project's trunk I'm free to use any versions of those libraries. So I start with the most recent versions. Then, each of those libraries gets an update once a month (on average). Now, keeping my trunk completely up to date would require updating a library reference every three days. This is obviously too much. Even though usually version 1.2.3 is a drop-in replacement for version 1.2.2, you never know without testing. Unit tests aren't enough; if it's a DB / file engine, you have to ensure that it works properly with files that were created with older versions, and maybe vice versa. If it has something to do with GUI, you have to visually inspect everything. And so on. How do you handle this? Some possible approaches: If it ain't broke, don't fix it. Stay with your current version of the library as long as you don't notice anything wrong with it when used in your application, no matter how often the library vendor publishes updates. Small incremental changes are just waste. Update frequently in order to keep change small. Since you'll have to update some day in any case, it's better to update often so that you notice any problems early when they're easy to fix, instead of jumping over several versions and letting potential problems to accumulate. Something in between. Is there a sweet spot?

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• How to restore from file using Symantec NetBackup 7.5

  - by Tony

  I have an install of Symantec NetBackup 7.5 and I want to restore the server from a NetBackup image file. The file was created using NetBackup before I arrived. We had a hardware failure that corrupted this server and it needed to be rebuilt, now we want to restore from this image file. I can't for the life of me figure out how to restore from that file. I've installed the NetBackup application but it can't find the file when using the restore command within the application. If I double-click the file it opens the application then gives me the same "can't find any NetBackup files" error. I also can't simply drag the file into the NetBackup window. Any advice on how I restore from this file would be appreciated, thank you.

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• SharePoint 2010 Search - not search additional content sources

  - by Chris W

  I've got SP 2010 crawling a secondary intranet system that we'll run in parallel as part of a long running migration to SharePoint when it releases. Whilst it's crawling the pages without problem I can't see how to get the results to appear as part of the Quick Search results if the user does a search from the little search dialog box on the home page. Searches completed within a My Sites pages lists results from port the SharePoint installation and the external content source. Searches from the main search dialog only list results of SharePoint items. I tried adding the drop down option to select the site to search but this list only includes the name of the current site and doesn't offer an 'All Sites' scope option which I think would include the content. What am I doing wrong?

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• KVM Guest not reachable from host

  - by Paul

  Hello, I'm running Ubuntu server 9.10, installed KVM etc. Created the bridge network following instructions on help.ubuntu.com/community/KVM/Networking Created a windows 2008 guest using virt-install command line (using virt-manager GUI from a remote Ubuntu desktop would not let me select the ISO location). I can however use a remote virt-manager to connect to the guest and complete the windows install. Within windows 2008 I changed the IP address but cannot ping from outside world. The bridge network appears fine - I'm not sure what else to look at! Here is the interfaces file: The loopback network interface auto lo iface lo inet loopback The primary network interface auto eth0 iface eth0 inet manual # auto br0 iface br0 inet static address 60.234.64.50 netmask 255.255.255.248 network 60.234.0.0 broadcast 60.234.0.255 gateway 60.234.64.49 bridge_ports eth0 bridge_stp off bridge_fd 0 bridge_maxwait 0 auto eth1 iface eth1 inet static address 192.168.12.2 netmask 255.255.255.0 broadcast 192.168.12.255 The ip of the windows server is 60.234.64.52 What else should I check? Regards Paul.

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• How reliable is HDD SMART data?

  - by andahlst

  Based on SMART data, you can judge the health of a disk, at least that is the idea. If I, for instance, run sudo smartctl -H /dev/sda on my ArchLinux laptop, it says that the hard drive passed the self tests and that it should be "healthy" based on this. My question is how reliable this information is, or more specifically: If according to the SMART data this disk is healthy, what are the odds of the disk suddenly failing despite this? This assumes the failure is not due to some catastrophic event that impossibly could have been predicted, such as the laptop falling down on the floor causing the drive heads to hit the disk. If the SMART data does not say the disk is in good shape, what are the odds of the disk failing within some amount of time? Is it possible that there will be false positives and how common are these? Of course, I keep backups no matter what. I am mostly curious.

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• EBS Seed Data Comparison Reports Now Available

  - by Steven Chan (Oracle Development)

  Earlier this year we released a reporting tool that reports on the differences in E-Business Suite database objects between one release and another.  That's a very useful reference, but EBS defaults are delivered as seed data within the database objects themselves. What about the differences in this seed data between one release and another? I'm pleased to announce the availability of a new tool that provides comparison reports of E-Business Suite seed data between EBS 11.5.10.2, 12.0.4, 12.0.6, 12.1.1, and 12.1.3.  This new tool complements the information in the data model comparison tool.  You can download the new seed data comparison tool here: EBS ATG Seed Data Comparison Report (Note 1327399.1) The EBS ATG Seed Data Comparison Report provides report on the changes between different EBS releases based upon the seed data changes delivered by the product data loader files (.ldt extension) based on EBS ATG loader control (.lct extension) files.  You can use this new tool to report on the differences in the following types of seed data: Concurrent Program definitions Descriptive Flexfield entity definitions Application Object Library profile option definitions Application Object Library (AOL) key flexfield, function, lookups, value set definitions Application Object Library (AOL) menu and responsibility definitions Application Object Library messages Application Object Library request set definitions Application Object Library printer styles definitions Report Manager / WebADI component and integrator entity definitions Business Intelligence Publisher (BI Publisher) entity definitions BIS Request Set Generator entity definitions ... and more Your feedback is welcomeThis new tool was produced by our hard-working EBS Release Management team, and they're actively seeking your feedback.  Please feel free to share your experiences with it by posting a comment here.  You can also request enhancements to this tool via the distribution list address included in Note 1327399.1.Related Articles Oracle E-Business Suite Release 12.1.3 Now Available New Whitepaper: Upgrading EBS 11i Forms + OA Framework Personalizations to EBS 12 EBS 12.0 Minimum Requirements for Extended Support Finalized Five Key Resources for Upgrading to E-Business Suite Release 12 E-Business Suite Release 12.1.1 Consolidated Upgrade Patch 1 Now Available New Whitepaper: Planning Your E-Business Suite Upgrade from Release 11i to 12.1

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• Changes to the LINQ-to-StreamInsight Dialect

  - by Roman Schindlauer

  In previous versions of StreamInsight (1.0 through 2.0), CepStream<> represents temporal streams of many varieties: Streams with ‘open’ inputs (e.g., those defined and composed over CepStream<T>.Create(string streamName) Streams with ‘partially bound’ inputs (e.g., those defined and composed over CepStream<T>.Create(Type adapterFactory, …)) Streams with fully bound inputs (e.g., those defined and composed over To*Stream – sequences or DQC) The stream may be embedded (where Server.Create is used) The stream may be remote (where Server.Connect is used) When adding support for new programming primitives in StreamInsight 2.1, we faced a choice: Add a fourth variety (use CepStream<> to represent streams that are bound the new programming model constructs), or introduce a separate type that represents temporal streams in the new user model. We opted for the latter. Introducing a new type has the effect of reducing the number of (confusing) runtime failures due to inappropriate uses of CepStream<> instances in the incorrect context. The new types are: IStreamable<>, which logically represents a temporal stream. IQStreamable<> : IStreamable<>, which represents a queryable temporal stream. Its relationship to IStreamable<> is analogous to the relationship of IQueryable<> to IEnumerable<>. The developer can compose temporal queries over remote stream sources using this type. The syntax of temporal queries composed over IQStreamable<> is mostly consistent with the syntax of our existing CepStream<>-based LINQ provider. However, we have taken the opportunity to refine certain aspects of the language surface. Differences are outlined below. Because 2.1 introduces new types to represent temporal queries, the changes outlined in this post do no impact existing StreamInsight applications using the existing types! SelectMany StreamInsight does not support the SelectMany operator in its usual form (which is analogous to SQL’s “CROSS APPLY” operator): static IEnumerable<R> SelectMany<T, R>(this IEnumerable<T> source, Func<T, IEnumerable<R>> collectionSelector) It instead uses SelectMany as a convenient syntactic representation of an inner join. The parameter to the selector function is thus unavailable. Because the parameter isn’t supported, its type in StreamInsight 1.0 – 2.0 wasn’t carefully scrutinized. Unfortunately, the type chosen for the parameter is nonsensical to LINQ programmers: static CepStream<R> SelectMany<T, R>(this CepStream<T> source, Expression<Func<CepStream<T>, CepStream<R>>> streamSelector) Using Unit as the type for the parameter accurately reflects the StreamInsight’s capabilities: static IQStreamable<R> SelectMany<T, R>(this IQStreamable<T> source, Expression<Func<Unit, IQStreamable<R>>> streamSelector) For queries that succeed – that is, queries that do not reference the stream selector parameter – there is no difference between the code written for the two overloads: from x in xs from y in ys select f(x, y) Top-K The Take operator used in StreamInsight causes confusion for LINQ programmers because it is applied to the (unbounded) stream rather than the (bounded) window, suggesting that the query as a whole will return k rows: (from win in xs.SnapshotWindow() from x in win orderby x.A select x.B).Take(k) The use of SelectMany is also unfortunate in this context because it implies the availability of the window parameter within the remainder of the comprehension. The following compiles but fails at runtime: (from win in xs.SnapshotWindow() from x in win orderby x.A select win).Take(k) The Take operator in 2.1 is applied to the window rather than the stream: Before After (from win in xs.SnapshotWindow() from x in win orderby x.A select x.B).Take(k) from win in xs.SnapshotWindow() from b in     (from x in win     orderby x.A     select x.B).Take(k) select b Multicast We are introducing an explicit multicast operator in order to preserve expression identity, which is important given the semantics about moving code to and from StreamInsight. This also better matches existing LINQ dialects, such as Reactive. This pattern enables expressing multicasting in two ways: Implicit Explicit var ys = from x in xs          where x.A > 1          select x; var zs = from y1 in ys          from y2 in ys.ShiftEventTime(_ => TimeSpan.FromSeconds(1))          select y1 + y2; var ys = from x in xs          where x.A > 1          select x; var zs = ys.Multicast(ys1 =>     from y1 in ys1     from y2 in ys1.ShiftEventTime(_ => TimeSpan.FromSeconds(1))     select y1 + y2; Notice the product translates an expression using implicit multicast into an expression using the explicit multicast operator. The user does not see this translation. Default window policies Only default window policies are supported in the new surface. Other policies can be simulated by using AlterEventLifetime. Before After xs.SnapshotWindow(     WindowInputPolicy.ClipToWindow,     SnapshotWindowInputPolicy.Clip) xs.SnapshotWindow() xs.TumblingWindow(     TimeSpan.FromSeconds(1),     HoppingWindowOutputPolicy.PointAlignToWindowEnd) xs.TumblingWindow(     TimeSpan.FromSeconds(1)) xs.TumblingWindow(     TimeSpan.FromSeconds(1),     HoppingWindowOutputPolicy.ClipToWindowEnd) Not supported … LeftAntiJoin Representation of LASJ as a correlated sub-query in the LINQ surface is problematic as the StreamInsight engine does not support correlated sub-queries (see discussion of SelectMany). The current syntax requires the introduction of an otherwise unsupported ‘IsEmpty()’ operator. As a result, the pattern is not discoverable and implies capabilities not present in the server. The direct representation of LASJ is used instead: Before After from x in xs where     (from y in ys     where x.A > y.B     select y).IsEmpty() select x xs.LeftAntiJoin(ys, (x, y) => x.A > y.B) from x in xs where     (from y in ys     where x.A == y.B     select y).IsEmpty() select x xs.LeftAntiJoin(ys, x => x.A, y => y.B) ApplyWithUnion The ApplyWithUnion methods have been deprecated since their signatures are redundant given the standard SelectMany overloads: Before After xs.GroupBy(x => x.A).ApplyWithUnion(gs => from win in gs.SnapshotWindow() select win.Count()) xs.GroupBy(x => x.A).SelectMany(     gs =>     from win in gs.SnapshotWindow()     select win.Count()) xs.GroupBy(x => x.A).ApplyWithUnion(gs => from win in gs.SnapshotWindow() select win.Count(), r => new { r.Key, Count = r.Payload }) from x in xs group x by x.A into gs from win in gs.SnapshotWindow() select new { gs.Key, Count = win.Count() } Alternate UDO syntax The representation of UDOs in the StreamInsight LINQ dialect confuses cardinalities. Based on the semantics of user-defined operators in StreamInsight, one would expect to construct queries in the following form: from win in xs.SnapshotWindow() from y in MyUdo(win) select y Instead, the UDO proxy method is referenced within a projection, and the (many) results returned by the user code are automatically flattened into a stream: from win in xs.SnapshotWindow() select MyUdo(win) The “many-or-one” confusion is exemplified by the following example that compiles but fails at runtime: from win in xs.SnapshotWindow() select MyUdo(win) + win.Count() The above query must fail because the UDO is in fact returning many values per window while the count aggregate is returning one. Original syntax New alternate syntax from win in xs.SnapshotWindow() select win.UdoProxy(1) from win in xs.SnapshotWindow() from y in win.UserDefinedOperator(() => new Udo(1)) select y -or- from win in xs.SnapshotWindow() from y in win.UdoMacro(1) select y Notice that this formulation also sidesteps the dynamic type pitfalls of the existing “proxy method” approach to UDOs, in which the type of the UDO implementation (TInput, TOuput) and the type of its constructor arguments (TConfig) need to align in a precise and non-obvious way with the argument and return types for the corresponding proxy method. UDSO syntax UDSO currently leverages the DataContractSerializer to clone initial state for logical instances of the user operator. Initial state will instead be described by an expression in the new LINQ surface. Before After xs.Scan(new Udso()) xs.Scan(() => new Udso()) Name changes ShiftEventTime => AlterEventStartTime: The alter event lifetime overload taking a new start time value has been renamed. CountByStartTimeWindow => CountWindow

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