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• jQuery code working in Safari and Chrome but not Firefox

  - by Chris Armstrong

  I'm got a site that has a long list of tweets, and as you scroll down the right column follows you down, showing stats on the tweets. (See it in action at http://www.grapevinegame.com . Click 'memorise', then 'skip' to get to the list page. Works in Safari and Chrome). I'm using jQuery to update the top-margin of the right column, increasing it as I scroll down. It seems to be working fine in webkit-based browsers, but doesn't budge in Firefox. Heres the code, the right column element is a div with id = "distance". // Listen for scroll function $(window).scroll(function () { // Calculating the position of the scrollbar var doc = $("body"), scrollPosition = $("body").scrollTop(), pageSize = $("body").height(), windowSize = $(window).height(), fullScroll = (pageSize) - windowSize; percentageScrolled = (scrollPosition / fullScroll); var entries = $("#whispers-list > li").length; // Set position of distance counter $('div#distance').css('margin-top', ($("#whispers-list").height()+$("#latest-whisper").height()+33)*percentageScrolled); // Update distance counter $('#distance-travelled').text(Math.round(distanceTravelled*(1-percentageScrolled))); $('#whispers-list li').each(function(index) { //highlight adjacent whispers if ($('#whispers-list li:nth-child('+(index+1)+')').offset().top >= $('#distance').offset().top && $('#whispers-list li:nth-child('+(index+1)+')').offset().top <= $('#distance').offset().top + $('#distance').height()) { // alert("yup"); $('#whispers-list li:nth-child('+(index+1)+') ul').fadeTo(1, 1); } else { $('#whispers-list li:nth-child('+(index+1)+') ul').fadeTo(1, 0.5); } }); }); Appreciate any help or advice!

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• Monitoring tools that can take high rate and high volume?

  - by Jon Watte

  We're using Cacti with RRDTool to monitor and graph about 100,000 counters spread across about 1,000 Linux-based nodes. However, our current setup generally only gives us 5-minute graphs (with some data being minute-based); we often make changes where seeing feedback in "near real time" would be of value. I'd like approximately a week of 5- or 10-second data, a year of 1-minute data, and 5 years of 10-minute data. I have SSD disks and a dual-hexa-core server to spare. I tried setting up a Graphite/carbon/whisper server, and had about 15 nodes pipe to it, but it only has "average" for the retention function when promoting to older buckets. This is almost useless -- I'd like min, max, average, standard deviation, and perhaps "total sum" and "number of samples" or perhaps "95th percentile" available. The developer claims there's a new back-end "in beta" that allows you to write your own function, but this appears to still only do 1:1 retention (when saving older data, you really want the statistics calculated into many streams from a single input. Also, "in beta" seems a little risky for this installation. If I'm wrong about this assumption, I'd be happy to be shown my error! I've heard Zabbix recommended, but it puts data into MySQL or some other SQL database. 100,000 counters on a 5 second interval means 20,000 tps, and while I have an SSD, I don't have an 8-way RAID-6 with battery backup cache, which I think I'd need for that to work out :-) Again, if that's actually something that's not a problem, I'd be happy to be shown the error of my ways. Also, can Zabbix do the single data stream - promote with statistics thing? Finally, Munin claims to have a new 2.0 coming out "in beta" right now, and it boasts custom retention plans. However, again, it's that "in beta" part -- has anyone used that for real, and at scale? How did it perform, if so? I'm almost thinking about using a graphing front-end (such as Graphite) and rolling my own retention backend with a simple layer on top of mmap() and some stats. That wouldn't be particularly hard, and would probably perform very well, letting the kernel figure out the balance between frequency of flushing to disk and process operations. Any other suggestions I should look into? Note: it has to have shown itself able to sustain the kinds of data loads I'm suggesting above; if you can point at the specific implementation you're referencing, so much the better!

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• SQLAuthority News – Why VoIP Service Providers Should Think About NuoDB’s Geo Distribution

  - by Pinal Dave

  You can always tell when someone’s showing off their cool, cutting edge comms technology. They tend to raise their voice a lot. Back in the day they’d announce their gadget leadership to the rest of the herd by shouting into their cellphone. Usually the message was no more urgent than “Hi, I’m on my cellphone!” Now the same types will loudly name-drop a different technology to the rest of the airport lounge. “I’m leveraging the wifi,” a fellow passenger bellowed, the other day, as we filtered through the departure gate. Nobody needed to know that, but the subtext was “look at me everybody”. You can tell the really advanced mobile user – they tend to whisper. Their handset has a microphone (how cool is that!) and they know how to use it. Sometimes these shouty public broadcasters aren’t even connected anyway because the database for their Voice over IP (VoIP) platform can’t cope. This will happen if they are using a traditional SQL model to try and cope with a phone network which has far flung offices and hundreds of mobile employees. That, like shouting into your phone, is just wrong on so many levels. What VoIP needs now is a single, logical database across multiple servers in different geographies. It needs to be updated in real-time and automatically scaled out during times of peak demand. A VoIP system should scale up to handle increased traffic, but just as importantly is must then go back down in the off peak hours. Try this with a MySQL database. It can’t scale easily enough, so it will keep your developers busy. They’ll have spent many hours trying to knit the different databases together. Traditional relational databases can possibly achieve this, at a price. Mind you, you could extend baked bean cans and string to every point on the network and that would be no less elegant. That’s not really following engineering principles though is it? Having said that, most telcos and VoIP systems use a separate, independent solution for each office location, which they link together – loosely.  The more office locations, the more complex and expensive the solution becomes and so the more you spend on maintenance. Ideally, you’d have a fluid system that can automatically shift its shape as the need arises. That’s the point of software isn’t it – it adapts. Otherwise, we might as well return to the old days. A MySQL system isn’t exactly baked bean cans attached by string, but it’s closer in spirit to the old many teethed mechanical beast that was employed in the first type of automated switchboard. NuoBD’s NewSQL is designed to be a single database that works across multiple servers, which can scale easily, and scale on demand. That’s one system that gives high connectivity but no latency, complexity or maintenance issues. MySQL works in some circumstances, but a period of growth isn’t one of them. So as a company moves forward, the MySQL database can’t keep pace. Data storage and data replication errors creep in. Soon the diaspora of offices becomes a problem. Your telephone system isn’t just distributed, it is literally all over the place. Though voice calls are often a software function, some of the old habits of telephony remain. When you call an engineer out, some of them will listen to what you’re asking for and announce that it cannot be done. This is what happens if you ask, say, database engineers familiar with Oracle or Microsoft to fulfill your wish for a low maintenance system built on a single, fluid, scalable database. No can do, they’d say. In fact, I heard one shouting something similar into his VoIP handset at the airport. “I can’t get on the network, Mac. I’m on MySQL.” You can download NuoDB from here. “NuoDB provides the ability to replicate data globally in real-time, which is not available with any other product offering,” states Weeks.  “That alone is remarkable and it works. I’ve seen it. I’ve used it.  I’ve tested it. The ability to deploy NuoDB removes a tremendous burden from our support and engineering teams.” Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL Tagged: NuoDB

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• What would make a noise in a PC on graphics operations on a passively-cooled system?

  - by T.J. Crowder

  I have this system based on the Intel D510MO motherboard, which is basically an Atom D510 (dual-core HT Atom w/built-in GPU), an Intel NM10 chipset, and a Realtek Gigabit LAN controller. It's entirely passively cooled. I noticed almost immediately that there was a kind of very, very soft noise that corresponded with graphics operations, sort of the noise you'd get if you had a sheet of flat paper and slid something really light across it — but more electronic than that. I wrote it off as observation error and/or disk activity triggered by the graphics operation (although the latter seemed like a lot of unnecessary disk activity). It isn't. I got curious enough that I finally did a few controlled experiments, and here's what I've determined: It isn't the HDD. For one thing, the sounds the HDD makes (when seeking, when reading or writing, when just sitting there spinning) is different. For another, I used sudo hdparm -y /dev/sda (I'm using Ubuntu 10.04 LTS) to temporarily put the disk on standby while making sure that non-disk graphics op was happening in a loop. The disk spun down, but the other sound continued, corresponding perfectly with the timing of the graphics op. (Then the disk spun up again, but it takes long enough that I could rule out the HDD.) It isn't the monitor; I ensured the two were well physically-separated and the sound was definitely coming from the main box. It isn't something else in the room; the sound is coming from the box. It isn't cross-talk to an audio circuit coming out the speakers. (It doesn't have any speakers.) It isn't my mouse (e.g., when I'm trying to make graphics ops happen); the sound happens if I set up a recurring operation and don't use the mouse at all, or if I lift the mouse off the table slightly (but enough that the laser still registers movement). It isn't the voices in my head; they never whisper like that. Other observations: It doesn't seem to matter what the graphics operation is; anything that changes what's on the screen seems to do it. I get the sound when moving the mouse over the Chromium tab bar (which makes the tab backgrounds change); I get it when a web page has a counter on it that changes the text on the page: I get it when dragging window contents around. The sound is very, very slightly louder if the graphics op is larger, like scrolling a text area when writing a question on superuser.com, than for smaller operations like the tick counter on the web page. But it's very slight. It's fairly loud (and of good duration) when the op involves color changes to substantial surface areas. For instance, when asking a question here on superuser and you move the cursor between the question box and the tag box, and the help to the right fades out, changes, and fades back in. (Yet another example related to the web browser, so let me say: I hear it when operations completely unrelated to the web browser as well.) It doesn't sound like arcing or anything like that (I'd've shut off the machine Right Quick Like if it did). Moving windows does it. Scrolling windows (by and large) doesn't. I have the feeling I've heard this sort of thing before, when all system fans were on low and such, with other systems — but (again) written it off as observational error. For all the world it's like I'm hearing the CPU working (as opposed to the GPU; note the window scroll thing above) or data being transferred somewhere, but that just seems...unlikely. So what am I hearing? This may seem like a very localized question, but perhaps other silent PC enthusiasts may be interested as well...

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• CodePlex Daily Summary for Wednesday, December 01, 2010

  CodePlex Daily Summary for Wednesday, December 01, 2010Popular ReleasesUltimateJB: UltimateJB 2.02 PL3 KAKAROTO + CE-X-3.41 EvilSperm: Voici une version attendu avec impatience pour beaucoup : - La Version CEX341 pour pouvoir jouer avec des jeux demandant le firmware 3.50 ( certain ne fonctionne tous simplement pas ). - Pour l'instant le CEX341 n'est disponible qu'avec les PS3 en firmwares 3.41 !!! - La version PL3 KAKAROTO intégre ses dernières modification et intégre maintenant le firmware 3.30 !!! Conclusion : - UltimateJB CEX341 => Spoof le Firmware 3.41 en 3.50 ( facilite l'utilisation de certain jeux avec openManage...Menu and Context Menu for Silverlight 4.0: Silverlight Menu and Context Menu v2.2 Beta2: - Added keyboard navigation support with access keys - Shortcuts like Ctrl-Alt-A are now supported(where the browser permits it) - The PopupMenuSeparator is now completely based on the PopupMenuItem class - Moved item manipulation code to a partial class in PopupMenuItemsControl.cs - Simplified the layout by removing the RootGrid element(all content is now placed in OverlayCanvas and is accessed by the new ContentRoot property) - Added properties AccessKey, AccessKeyModifier, AccessKeyElemen...EnhSim: EnhSim 2.1.1: 2.1.1This release adds in the changes for 4.03a. To use this release, you must have the Microsoft Visual C++ 2010 Redistributable Package installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=A7B7A05E-6DE6-4D3A-A423-37BF0912DB84 To use the GUI you must have the .NET 4.0 Framework installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=9cfb2d51-5ff4-4491-b0e5-b386f32c0992 - Switched Searing Flames bac...AI: Initial 0.0.1: It’s simply just one code file; it simulates AI and machine in a simulated world. The AI has a little understanding of its body machine and parts, and able to use its feet to do actions just start and stop walking. The world is all of white with nothing but just the machine on a white planet. Colors, odors and position information make no sense. I’m previous C# programmer and I’m learning F# during this project, although I’m still not a good F# programmer, in this project I learning to prog...Microsoft - Domain Oriented N-Layered .NET 4.0 App Sample (Microsoft Spain): V1.0 - N-Layer DDD Sample App .NET 4.0: Required Software (Microsoft Base Software needed for Development environment) Visual Studio 2010 RTM & .NET 4.0 RTM (Final Versions) Expression Blend 4 SQL Server 2008 R2 Express/Standard/Enterprise Unity Application Block 2.0 - Published May 5th 2010 http://www.microsoft.com/downloads/en/details.aspx?FamilyID=2D24F179-E0A6-49D7-89C4-5B67D939F91B&displaylang=en http://unity.codeplex.com/releases/view/31277 PEX & MOLES 0.94.51023.0, 29/Oct/2010 - Visual Studio 2010 Power Tools http://re...Sense/Net Enterprise Portal & ECMS: SenseNet 6.0.1 Community Edition: Sense/Net 6.0.1 Community Edition This half year we have been working quite fiercely to bring you the long-awaited release of Sense/Net 6.0. Download this Community Edition to see what we have been up to. These months we have worked on getting the WebCMS capabilities of Sense/Net 6.0 up to par. New features include: New, powerful page and portlet editing experience. HTML and CSS cleanup, new, powerful site skinning system. Upgraded, lightning-fast indexing and query via Lucene. Limita...Minecraft GPS: Minecraft GPS 1.1.1: New Features Compass! New style. Set opacity on main window to allow overlay of Minecraft. Open World in any folder. Fixes Fixed style so listbox won't grow the window size. Fixed open file dialog issue on non-vista kernel machines.DotSpatial: DotSpatial 11-28-2001: This release introduces some exciting improvements. Support for big raster, both in display and changing the scheme. Faster raster scheme creation for all rasters. Caching of the "sample" values so once obtained the raster symbolizer dialog loads faster. Reprojection supported for raster and image classes. Affine transform fully supported for images and rasters, so skewed images are now possible. Projection uses better checks when loading unprojected layers. GDAL raster support f...SuperWebSocket: SuperWebSocket(60438): It is the first release of SuperWebSocket. Because it is base on SuperSocket, most features of SuperSocket are supported in SuperWebSocket. The source code include a LiveChat demo.MDownloader: MDownloader-0.15.25.7002: Fixed updater Fixed FileServe Fixed LetItBitCropper: 1.9.4: Mostly fixes for issues with a few feature requests. Fixed Issues 2730 & 3638 & 14467 11044 11447 11448 11449 14665 Implemented Features 6123 11581PFC: PFC for PB 11.5: This is just a migration from the 11.0 code. No changes have been made yet (and they are needed) for it to work properly with 11.5.PDF Rider: PDF Rider 0.5: This release does not add any new feature for pdf manipulation, but enables automatic updates checking, so it is reccomended to install it in order to stay updated with next releases. Prerequisites * Microsoft Windows Operating Systems (XP - Vista - 7) * Microsoft .NET Framework 3.5 runtime * A PDF rendering software (i.e. Adobe Reader) that can be opened inside Internet Explorer. Installation instructionsChoose one of the following methods: 1. Download and run the "pdfRider0...BCLExtensions: BCL Extensions v1.0: The files associated with v1.0 of the BCL Extensions library.XamlQuery/WPF - The Write Less, Do More, WPF Library: XamlQuery-WPF v1.2 (Runtime, Source): This is the first release of popular XamlQuery library for WPF. XamlQuery has already gained recognition among Silverlight developers.Math.NET Numerics: Beta 1: First beta of Math.NET Numerics. Only contains the managed linear algebra provider. Beta 2 will include the native linear algebra providers along with better documentation and examples.Microsoft All-In-One Code Framework: Visual Studio 2010 Code Samples 2010-11-25: Code samples for Visual Studio 2010Wii Backup Fusion: Wii Backup Fusion 0.8.5 Beta: - WBFS repair (default) options fixed - Transfer to image fixed - Settings ui widget names fixed - Some little bug fixes You need to reset the settings! Delete WiiBaFu's config file or registry entries on windows: Linux: ~/.config/WiiBaFu/wiibafu.conf Windows: HKEY_CURRENT_USER\Software\WiiBaFu\wiibafu Mac OS X: ~/Library/Preferences/com.wiibafu.wiibafu.plist Caution: This is a BETA version! Errors, crashes and data loss not impossible! Use in test environments only, not on productive syste...Minemapper: Minemapper v0.1.3: Added process count and world size calculation progress to the status bar. Added View->'Status Bar' menu item to show/hide the status bar. Status bar is automatically shown when loading a world. Added a prompt, when loading a world, to use or clear cached images.Sexy Select: sexy select v0.4: Changes in v0.4 Added method : elements. This returns all the option elements that are currently added to the select list Added method : selectOption. This method accepts two values, the element to be modified and the selected state. (true/false)New ProjectsAbstract SQL: ADO.NET Sql classes wrapper; provides a clean fluent interface library that allows you to write very concise code and avoid the repetitiveness of ADO.NET. It can be used in all types of applications, even supports CLR stored procedures. It is written in C# 2.0.AI: The Artificial Intelligence program built on F#.Another .NET wrapper for the MailChimp API: A .NET wrapper for the MailChimp API 1.3 written in F# by DK.App-V Tool Suite: A collection of tools for Microsoft Application Virtualization (App-V). These tools were developed at Sinclair Community College in the process of setting up and then supporting its App-V implementation.b2b: Project-01tBham.CmuCam: A library and GUI front-end for the CMUcam series of cameras for use by .NET-based applications, the GUI can also run standalone.BizTalk Deployment Tool: Yet another BizTalk Deployment Tool to make it easier for BizTalk deployment that needs to support orchestration versioning, multiple environments. Features includes but not limited to: GAC Verification, Receive Locations and Send Ports management, Orchestration States managementCertificate Request (PKCS#10) Generator: A .NET application that can create PKCS#10 Certificate Requests, either by generating a new key or reusing a preexisting one. Minimum requirement : Windows Vista and above. .NET 2.0.Cloud Billing: Cloud billing proposal.Currency Converter: Coding4Fun Windows Phone 7 Currency ConverterDiffLib: A diff implementation class library for .NET 3.5 written in C#.expression Blend 4.0 Comment Uncomment Xaml Code Extension: BlendShortCuts Extension makes it easier for blend users to comment and uncomment xaml code. you'll no longer have to insert tag <!-- --> just press ALt+C and ALT+U it's developed in c# (.Net framework 4.0, microsoft expression library)Game Studio: Game Studio is an Integrated Development Environment “IDE” that helps game developers in designing their games. The software generates code for the mesh, models, pictures and sounds. It has a form designer, code editor and a special framework for the “Game Studio”.Gridify for ASP.NET MVC: Easy solution for grids on top of ASP.NET MVC Make grids from your data tables in a really lightweight manner! How lightweight? Well, exactly TWO line changes. You don't have to add new action parameters or anything. Really simple!In-House Inventory System: a normal inventory management system, normal use case and normal function.In-House Money Saver: just for school project, it may not be useful, however, it is my first project using Microsoft technology.ITICup2009: Programs used in ITICup 2009.libobs++: Implementation of a signal/slot system, created exclusively for developers that uses Visual Studio's 2010 IDE/Compiler. The classes are templated, and really easy to learn. The callbacks are fast, and type-safe.Longan ERP: Open Source Business Solutions.Lucienne - WebScripting Assignment: Lucienne - WebScripting AssignmentMercurial.Net: .NET wrapper class library for the Mercurial Distributed Version Control System (DVCS) - (http://mercurial.selenic.com/), written in C# 3.0 for the .NET 3.5 Client Profile runtime.Mini C++ UI Framework: Mini C++ UI Framework for my work.MinuRaamu: MeieRaamuMobile Device Browser File: The Mobile Browser Definition File contains definitions for individual mobile devices and browsers. At run time, ASP.NET uses the information in the request header to determine what type of device/browser has made the request.NKinect: .NET 4.0 (C++/CLI) based open source implementation of Microsoft Kinect. Currently supports CodeLaboratories NUI SDK, but will be brought to OpenKinect/libfreenect when a Windows version is stable.Oblivion Cell - Oblivion mmo project: We are working on creating a mmorpg mod/Addon for Oblivion using C# and hooking to the accual game with obse and a few other mods. We also use Cell Framework for our base server system.Optional: Optional is a library to create options and commands from command-line arguments. It uses Convention over Configuration to get out of your way. Attributes can be used to set properties which differ from the convention.Paypal adaptive payments using .NET (C#): This is a C# project to help you interface with the PayPal adaptive payments API. https://www.x.com/community/ppx/adaptive_payments. POS bd: Dynamic POS. this project is being devoloped on focused to local market only. the initial project is projected for a single company whose main business is selling lighting-bulb instruments.PowerEvents for Windows PowerShell: A Microsoft Windows PowerShell module to assist with managing permanent WMI event consumer registrations. You can use this module to register for, and respond to, system-level events available to WMI.PPL Daily Report Helper: Daily Reporting Helper Tool for Phoenix Propulsion LabsRandom Passwd Generator: This is a simple program developed in C# that generates random passwords of the specified length with the specified characters to be used. It's in beta version.SharePoint MUI Manager: The SharePoint MUI Manager allows you to translate user-specified text, such as the Title and Description of the site, throught the web interface. There is no need to download, edit and upload a RESX file. Sqlite Client for Windows Phone: Sqlite client for Windows Phone 7 . Supports transactionsTouchToolkit: A toolkit to simplify the multi-touch application development and testing complexities. It currently supports WPF and Silverlight.TSI4: Proyecto para facultad de ingenieríaVS2010 Debugger Visualizers Contrib: This project is for hosting user-contributed debugger visualizers for Microsoft Visual Studio 2010.Windows Shell Framework: Windows Shell Framework is a managed wrappers for a subset of the windows shell. This Project is for of .NET Shell Namespace Extension FrameworkWork in Progress: Work in progressWPFtest: A simpel test project for experimenting with WPF.YingYangXonix: YingYangXonixZeroUnit.net: The zero dependency, zero friction, sugar free Unit Testing framework for .Net.ZXing barcode for Windows Phone: Barcode support for Windows Phone 7 using ZXing

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• How to retrive message list from p2p

  - by cre-johnny07

  Hello friends I have a messaging system that uses p2p. Each peer has a incoming message list and a outgoing message list. What I need to do is whenever a new peer will join the mesh he will get the all the incoming messages from other peers and add those into it's own incoming message list. Now I know when I get the other peer info from I can ask them to give their own list to me. But I'm not finding the way how..? Any suggestion on this or help would be highly appreciated. I'm giving my code below. Thanking in Advance Johnny #region Instance Fields private string strOrigin = ""; //the chat member name private string m_Member; //the channel instance where we execute our service methods against private IServerChannel m_participant; //the instance context which in this case is our window since it is the service host private InstanceContext m_site; //our binding transport for the p2p mesh private NetPeerTcpBinding m_binding; //the factory to create our chat channel private ChannelFactory<IServerChannel> m_channelFactory; //an interface provided by the channel exposing events to indicate //when we have connected or disconnected from the mesh private IOnlineStatus o_statusHandler; //a generic delegate to execute a thread against that accepts no args private delegate void NoArgDelegate(); //an object to hold user details private IUserService userService; //an Observable Collection of object to get all the Application Instance Details in databas ObservableCollection<AppLoginInstance> appLoginInstances; // an Observable Collection of object to get all Incoming Messages types ObservableCollection<MessageType> inComingMessageTypes; // an Observable Collection of object to get all Outgoing Messages ObservableCollection<PDCL.ERP.DataModels.Message> outGoingMessages; // an Observable Collection of object to get all Incoming Messages ObservableCollection<PDCL.ERP.DataModels.Message> inComingMessages; //an Event Aggregator to publish event for other modules to subscribe private readonly IEventAggregator eventAggregator; /// <summary> /// an IUnityCOntainer to get the container /// </summary> private IUnityContainer container; private RefreshConnectionStatus refreshConnectionStatus; private RefreshConnectionStatusEventArgs args; private ReplyRequestMessage replyMessageRequest; private ReplyRequestMessageEventArgs eventsArgs; #endregion public P2pMessageService(IUserService UserService, IEventAggregator EventAggregator, IUnityContainer container) { userService = UserService; this.container = container; appLoginInstances = new ObservableCollection<AppLoginInstance>(); inComingMessageTypes = new ObservableCollection<MessageType>(); inComingMessages = new ObservableCollection<PDCL.ERP.DataModels.Message>(); outGoingMessages = new ObservableCollection<PDCL.ERP.DataModels.Message>(); this.args = new RefreshConnectionStatusEventArgs(); this.eventsArgs = new ReplyRequestMessageEventArgs(); this.eventAggregator = EventAggregator; this.refreshConnectionStatus = this.eventAggregator.GetEvent<RefreshConnectionStatus>(); this.replyMessageRequest = this.eventAggregator.GetEvent<ReplyRequestMessage>(); } #region IOnlineStatus Event Handlers void ostat_Offline(object sender, EventArgs e) { // we could update a status bar or animate an icon to //indicate to the user they have disconnected from the mesh //currently i don't have a "disconnect" button but adding it //should be trivial if you understand the rest of this code } void ostat_Online(object sender, EventArgs e) { try { m_participant.Join(userService.AppInstance); } catch (Exception Ex) { Logger.Exception(Ex, Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } #endregion #region IServer Members //this method gets called from a background thread to //connect the service client to the p2p mesh specified //by the binding info in the app.config public void ConnectToMesh() { try { m_site = new InstanceContext(this); //use the binding from the app.config with default settings m_binding = new NetPeerTcpBinding("P2PMessageBinding"); m_channelFactory = new DuplexChannelFactory<IServerChannel>(m_site, "P2PMessageEndPoint"); m_participant = m_channelFactory.CreateChannel(); o_statusHandler = m_participant.GetProperty<IOnlineStatus>(); o_statusHandler.Online += new EventHandler(ostat_Online); o_statusHandler.Offline += new EventHandler(ostat_Offline); //m_participant.InitializeMesh(); //this.appLoginInstances.Add(this.userService.AppInstance); BackgroundWorkerHelper.DoWork<object>(() => { //this is an empty unhandled method on the service interface. //why? because for some reason p2p clients don't try to connect to the mesh //until the first service method call. so to facilitate connecting i call this method //to get the ball rolling. m_participant.InitializeMesh(); //SynchronizeMessage(this.inComingMessages); return new object(); }, arg => { }); this.appLoginInstances.Add(this.userService.AppInstance); } catch (Exception Ex) { Logger.Exception(Ex, Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } public void Join(AppLoginInstance obj) { try { // Adding Instance to the PeerList if (appLoginInstances.SingleOrDefault(a => a.InstanceId == obj.InstanceId)==null) { appLoginInstances.Add(obj); this.refreshConnectionStatus.Publish(new RefreshConnectionStatusEventArgs() { Status = m_channelFactory.State }); } //this will retrieve any new members that have joined before the current user m_participant.SynchronizeMemberList(userService.AppInstance); } catch(Exception Ex) { Logger.Exception(Ex,Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } /// <summary> /// Synchronizes member list /// </summary> /// <param name="obj">The AppLoginInstance Param</param> public void SynchronizeMemberList(AppLoginInstance obj) { //as member names come in we simply disregard duplicates and //add them to the member list, this way we can retrieve a list //of members already in the chatroom when we enter at any time. //again, since this is just an example this is the simplified //way to do things. the correct way would be to retrieve a list //of peernames and retrieve the metadata from each one which would //tell us what the member name is and add it. we would want to check //this list when we join the mesh to make sure our member name doesn't //conflict with someone else try { if (appLoginInstances.SingleOrDefault(a => a.InstanceId == obj.InstanceId) == null) { appLoginInstances.Add(obj); } } catch (Exception Ex) { Logger.Exception(Ex, Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } /// <summary> /// This methos broadcasts the mesasge to all peers. /// </summary> /// <param name="msg">The whole message which is to be broadcasted</param> /// <param name="securityLevels"> Level of security</param> public void BroadCastMsg(PDCL.ERP.DataModels.Message msg, List<string> securityLevels) { try { foreach (string s in securityLevels) { if (this.userService.IsInRole(s)) { if (this.inComingMessages.Count == 0 && msg.CreatedByApp != this.userService.AppInstanceId) { this.inComingMessages.Add(msg); } else if (this.inComingMessages.SingleOrDefault(a => a.MessageId == msg.MessageId) == null && msg.CreatedByApp != this.userService.AppInstanceId) { this.inComingMessages.Add(msg); } } } } catch (Exception Ex) { Logger.Exception(Ex, Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } /// <summary> /// /// </summary> /// <param name="msg">The Message to denyed</param> public void BroadCastReplyMsg(PDCL.ERP.DataModels.Message msg) { try { //if (this.inComingMessages.SingleOrDefault(a => a.MessageId == msg.MessageId) != null) //{ this.replyMessageRequest.Publish(new ReplyRequestMessageEventArgs() { Message = msg }); this.inComingMessages.Remove(this.inComingMessages.SingleOrDefault(o => o.MessageId == msg.MessageId)); //} } catch (Exception ex) { Logger.Exception(ex, ex.TargetSite.Name + ": " + ex.TargetSite + ": " + ex.Message); } } //again we need to sync the worker thread with the UI thread via Dispatcher public void Whisper(string Member, string MemberTo, string Message) { } public void InitializeMesh() { //do nothing } public void Leave(AppLoginInstance obj) { if (this.appLoginInstances.SingleOrDefault(a => a.InstanceId == obj.InstanceId) != null) { this.appLoginInstances.Remove(this.appLoginInstances.Single(a => a.InstanceId == obj.InstanceId)); } } //public void SynchronizeRemoveMemberList(AppLoginInstance obj) //{ // if (appLoginInstances.SingleOrDefault(a => a.InstanceId == obj.InstanceId) != null) // { // appLoginInstances.Remove(obj); // } //} #endregion

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