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• Web 2.0 Solutions with Oracle WebCenter 11g &ndash; Book Review

  - by juan.ruiz

  Recently I obtained a copy of the book Web 2.0 Solutions with Oracle Web Center 11g from Packt Publishing, right away I noticed that one of the authors of this book is a good and long time colleague of  mine Plinio Arbizu, whom I have joined for different developer events in Latin America in the past. In this entry you will find my review of the book. Chapter 1: What's Oracle WebCenter? Provides you with basic knowledge to understand the pieces of WebCenter and the role that these pieces play in the overall Oracle Fusion Middleware strategy. Chapter 2 and 3: Will guide you through installation process and set up instructions, required to start developing Web2.0 applications. The screenshots are very helpful. Chapter 4: The chapter will guide you through a series of steps for creating a basic HelloWorld application that uses ADF/Webservices/WebCenter framework to understand the relevant pieces that are part of the architecture in large Web2.0 solutions for WebCenter. One caveat on this chapter is that the use HTML in combination with ADF Faces is not a recommended practice, because in some cases (not in this one) HTML code generated by the components can conflict with existent HTML code place on the same page... so be careful. Chapter 5: Describes the basics to understand the usage of ADF Faces Rich Client Components, with templates and ADF Business components. Chapter 6: This chapter explains how to encapsulate, deploy and consume ADF UIs as JSR 168 portlets in a declarative way Chapter 7: Explains some of the WebCenter services and the different ways that these services can be integrated within WebCenter applications. Chapter 8: Goes over how to include a series of  WebCenter services provided out-of-the-box within applications. This chapter presents a simple and clear way of how to include RSS feeds, search capabilities, tagging and discussions using practical samples that are easy to follow. Chapter 9: Presents an important component of Oracle WebCenter - the composer. Through the composer and Oracle Metadata Services the composer adds all the functionality to perform end-user personalizations, which is a very common user case when working with portals. The concept is self-explanatory when running over the practice developed in this chapter. Chapter 10: Provides an introduction to WebCenter spaces, explaining common concepts about installation, administration (role creation, group creation, etc) and through a sample, the readers can put everything in practice on their own environments. Summary: This book would provide the reader with a fast start to work with Oracle WebCenter 11g  and its different components. In my opinion the book targets the developer audience, rather than the Portal type of audience, or content generator. For the readers of this book I recommend that to better understand the concepts discussed, first you need to understand the basics on Oracle Application Development Framework. Believe me you can thank me later!

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• A Warning to Those Using sys.dm_exec_query_stats

  - by Adam Machanic

  The sys.dm_exec_query_stats view is one of my favorite DMVs. It has replaced a large chunk of what I used to use SQL Trace for--pulling metrics about what queries are running and how often--and it makes this kind of data collection painless and automatic. What's not to love? But use cases for the view are a topic for another post. Today I want to quickly point out an inconsistency. If you're using this view heavily, as I am, you should know that in some cases your queries will not get a row. One...(read more)

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• Is Java Open?

  - by EmbeddedInsider

  One way to answer- “which one”  Brew, IBM, Nokia, Android?   Well lets look at the real deal- Sun Java.  How will this work for embedded devices: DEFINITIONS…. The use of Software in systems and solutions that provide dedicated functionality … or designed for use in embedded or function-specific software applications, for example but not limited to: Software embedded in or bundled with industrial control systems, wireless mobile telephones, wireless handheld devices, netbooks, kiosks, TV/STB, Blu-ray Disc devices, telematics and network control switching equipment, printers and storage management systems, and other related systems are excluded from this definition and not licensed under this Agreement. http://www.java.com/en/download/license.jsp Now, the interesting thing is the license between Sun and the people with Java clones.  Does that pass on this exclusion? Lawrence Ricci www.EmbeddedInsider.com

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• How to teach computer science ?

  - by proferikson

  I am just starting to teach computer science. It's just the basic level. I'm finding that I sometimes don't know how to approach topics in a way that lets students easily understand. I've found that the best thing is to use analogies. A terrible one, that worked well, was presenting recursion by using the process of eating a burger. (You eat one bite, then you eat the rest). Interesting real world examples do wonders here. I'd like to know the techniques you have used for teaching, or teachers you've had have used that proved particularly effective. I'd also like to know your best analogies and examples for topics in CS101, especially for those harder to grasp topics. I'm teaching the class in Java (as required).

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• Simple Scripting for your Exalogic Storage

  - by Trond Strømme

  As part of my job in Oracle ACS (Advanced Customer Services) I'm handling lots of different systems and customers. Among the recent systems I worked with have been Oracle's Exalogic engineered systems. One of the things I'd never had much exposure to as a system developer/architect/middleware guy/Java dude has been storage; outside of consuming it for my photography needs.. Well, I'm always ready for a new challenge... I'd downloaded the 7000 series storage simulator when it was released in the good old Sun days, found it fun and instructive to play around with, but as I never touched storage in any way (besides consuming it..) I forgot about it. A couple of years ago when I started working with Exalogic engineered systems it again came into light as an invaluable learning and testing tool for the embedded storage in an Exalogic;  Oracle's Sun ZFS Storage 7320 Appliance.  aaaanyway... I've been "booted" into a part-time role as the interim storage/system admin/middleware/Java guy for a client and found I needed to create the occasional report or summary or whatever.. of what's using the storage in the 7320 (as default configured for an Exalogic, 40T of disk in a mirrored configuration, yielding 18T of actual space.) Reading the nice documentation and some articles on the Oracle Technology Network I saw great possibilities with the embedded ECMAScript3/JavaScript engine in the 7000 series.  In my personal opinion anyone who's dealing with Exalogic administration, or exposed to any of the 7000 series of storage appliances and servers that Oracle offers should have a VirtualBox instance of it kicking around. For development and testing it's a fantastic tool. (It can save you from explaining (most) of the embarrassing FAILS you can do if you test something in a production system to your management...) So download, and install.  A small sidestep, if after firing up the 7000 series simulator in VirtualBox you've forgotten what it's IP address is, the following will sort you out if you log in directly via the running VirtualBox VM. So in my case I can ssh to 192.168.56.101 or point a browser to https://192.168.56.101:215 to log into the storage appliance. One simple way of executing a script on the 7320 is to ssh to the device and redirecting a file with the script in it to ssh. ssh [email protected] < myscript.js One question I got from my client and the people who will take over the systems was: "how can we see the quotas and allocations for all projects/shares in one easy go so we don't have to go navigating around in the BUI for all the hundreds of shares the 7320 is hosting just to check if anything is running dry?" Easy! JavaScript time, VirtualBox and emacs! //NOTE! this script is available 'as is' It has ben run on a couple of 7320's, (running 2010.08.17.3.0,1-1.25 & // 2011.04.24.1.0,1-1.8) a 7420 and the VB image, but I personally //offer no guarantee whatsoever that it won't make your server topple, catch fire or in any way go pear shaped.. //run at your own risk or learn from my code and or mistakes.. script run('cd /'); run('shares'); //get all projects: proj = list(); function spaceToGig(bytes){ return bytes/1073741824; //convert bytes to GB } function fullInPercent(quota, space_data){ tmp = (space_data/quota)*100; return tmp; } //print header, slightly good looking printf(" %s/%-15s %8s(GB) %7s(GB) %5s(GB) %7s(GB) %3s\n","Project", "Share","Quota","Ref", "Snap", "Total","%full"); printf("-------------------------------------------------------------------------------\n") //for each project, get all shares. check for quota and calculate percentage and human readable figures.. for (i=0;i<proj.length;i++){ run('select ' + proj[i]); //get all shares for a project var pshares = list(); //for each share get quota properties for (j=0;j<pshares.length;j++){ run('select ' + pshares[j]); quota = get('quota'); //properties associated with a share or inherited from a project spaceData = get('space_data'); spaceSnap = get('space_snapshots'); spaceTotal = get('space_total'); if(quota>0){ //has quota printf(" %s/%-15s \t%4.2fGB\t%.2fGB\t%.2fGB\t%.2fGB\t%5.2f%%\n",proj[i], pshares[j],spaceToGig(quota),spaceToGig(spaceData),spaceToGig(spaceSnap),spaceToGig(spaceTotal),fullInPercent(quota,spaceTotal)); }else{ //no quota printf(" %s/%-15s \t%8s\t%.2fGB\t%.2fGB\t%.2fGB\t%s\n",proj[i],pshares[j], "N/A", spaceToGig(spaceData),spaceToGig(spaceSnap),spaceToGig(spaceTotal),"N/A"); } run('cd ..'); } run('done'); } The resulting output should look something like this: Project/Share Quota(GB) Ref(GB) Snap(GB) Total(GB) %full ------------------------------------------------------------------------------- ACSExalogicSystem/domains N/A 0.04GB 0.00GB 0.04GB N/A ACSExalogicSystem/logs N/A 0.01GB 0.00GB 0.01GB N/A ACSExalogicSystem/nodemgrs N/A 0.00GB 0.00GB 0.00GB N/A ACSExalogicSystem/stores N/A 0.04GB 0.00GB 0.04GB N/A ***_dev/FMW_***_1 133GB 4.24GB 0.01GB 4.25GB 3.19% ***_dev/FMW_***_2 N/A 4.25GB 0.01GB 4.26GB N/A ***_dev/applications 10GB 0.00GB 0.00GB 0.00GB 0.00% ***_dev/domains 50GB 10.75GB 3.55GB 14.30GB 28.61% ***_dev/logs 20GB 0.32GB 0.01GB 0.33GB 1.66% ***_dev/softwaredepot 20GB 4.15GB 0.00GB 4.15GB 20.73% ***_dev/stores 20GB 0.01GB 0.00GB 0.01GB 0.05% ###_dev/FMW_###_1 400GB 17.63GB 0.12GB 17.75GB 4.44% ###_dev/applications N/A 0.00GB 0.00GB 0.00GB N/A ###_dev/domains 120GB 14.21GB 5.53GB 19.74GB 16.45% ###_dev/logs 15GB 0.00GB 0.00GB 0.00GB 0.00% ###_dev/softwaredepot 250GB 73.55GB 0.02GB 73.57GB 29.43% …snip My apologies if the output is a bit mis-aligned here and there, I only bothered making it look good, not perfect :/ I also removed some of the project names (*,#)

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• What should be a fair amount of time in an interview before rejecting a candidate?

  - by Danish

  As a panelist for technical interviews, you often come across candidates who have all the requried educational qualifications, skill sets and experience level on resumes, but struggle to answer even the most basic questions. Ideally, technical interviews should try to check different aspects of a candidate and test them on various skills. So, if the candidate falters on one aspect, one should test the other ones before coming to a conclusion. But often, if a candidates falters on the first few questions, the red flag rises up pretty quickly. What in your opinion should be the bare minimum time spent with a candidate before making a fair accessment of his/her skills and suitability for the job?

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• Electronic circuit simulator four-way flood-filling issues

  - by AJ Weeks

  I've made an electronic circuit board simulator which has simply 3 types of tiles: wires, power sources, and inverters. Wires connect to anything they touch, other than the sides of inverters; inverters have one input side and one output side; and finally power tiles connect in a similar manner as wires. In the case of an infinite loop, caused by the output of the inverter feeding into its input, I want inverters to oscillate (quickly turn on/off). I've attempted to implement a FloodFill algorithm to spread the power throughout the grid, but seem to have gotten something wrong, as only the tiles above the power source get powered (as seen below) I've attempted to debug the program, but have had no luck thus far. My code concerning the updating of power can be seen here.

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• Mass Metadata Updates with Folders

  - by Kyle Hatlestad

  With the release of WebCenter Content PS5, a new folder architecture called 'Framework Folders' was introduced.  This is meant to replace the folder architecture of 'Folders_g'.  While the concepts of a folder structure and access to those folders through Desktop Integration Suite remain the same, the underlying architecture of the component has been completely rewritten.  One of the main goals of the new folders is to scale better at large volumes and remove the limitations of 1000 content items or sub-folders within a folder.  Along with the new architecture, it has a new look and a few additional features have been added.  One of those features are Query Folders.  These are folders that are populated simply by a query rather then literally putting items within the folders.  This is something that the Library has provided, but it always took an administrator to define them through the Web Layout Editor.  Now users can quickly define query folders anywhere within the standard folder hierarchy. [ Read More ]

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• Ops Center 12.1.4 Released

  - by Owen Allen

  Ops Center version 12.1.4.0.0, an update for 12c, has just been released. There are a few new features. The biggest one is support for multiple Automated Installer install services, which means that you can provision any version of Oracle Solaris 11, rather than just one. We've also added support for multi-file VM templates, and enhanced the network configuration support for vServers. You can take a look at the What's New document for more information about the new features. If you're already using Ops Center, you can download the 12.1.4 upgrade through the UI, or get it from the Oracle Tech Network or from e-delivery. The Upgrade chapter in the Admin Guide explains how to perform the upgrade.

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• IL and case-sensitivity

  - by Ali .NET

  Quoted from A Brief Introduction To IL code, CLR, CTS, CLS and JIT In .NET CLS stands for Common Language Specifications. It is a subset of CTS. CLS is a set of rules or guidelines which if followed ensures that code written in one .NET language can be used by another .NET language. For example one rule is that we cannot have member functions with same name with case difference only i.e we should not have add() and Add(). This may work in C# because it is case-sensitive but if try to use that C# code in VB.NET, it is not possible because VB.NET is not case-sensitive. Based on above text I want to confirm two points here: Does the case-sensitivity of IL is a condition for member functions only, and not for member properties? Is it true that C# wouldn't be inter-operable with VB.NET if it didn't take care of the case sensitivity?

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• Score Minimalist Wallpapers at Simple Desktops

  - by Jason Fitzpatrick

  If you’re looking for some ultra-minimal desktop wallpapers, the curated selection at Simply Desktops has subtle wallpapers for all tastes. Whether you’re looking for something geeky, musically inspired, or abstract, there’s a plethora of minimalist wallpapers to choose from. Curated by Tim Watson, the growing collection showcases wallpapers with an emphasis on minimal design. In addition to browsing the collection via the web you can even automate the process of swapping your minimalist wallpapers by downloading the–currently Mac-only–Simple Desktops app. Hit up the link below to browse their archives, then post a link to your favorite in the comments! Simple Desktops How to Sync Your Media Across Your Entire House with XBMC How to Own Your Own Website (Even If You Can’t Build One) Pt 2 How to Own Your Own Website (Even If You Can’t Build One) Pt 1

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• Google Webmaster tools and geotargeting at TLD and Folder levels

  - by user3390918

  Hoping you can help us with this question: We are one Canada’s leading websites with a PR8. For privacy's sake, let's call our main URL www.OurMainWebsite.com As we are expanding globally, we are planning to build a web site to service the US market but want to keep the domain above as is from branding perspective. Questions: Can we keep: www.OurMainWebsite.com as the main Canada site and create a www.OurMainWebsite.com/US as the US site? Can those 2 URL's be geotargetted as per above, and wouldn't the fact that US is a subfolder of the main TLD through things off? can I target a TLD to one country and a subfolder under the TLD to abother? Thanks in advance for your help.

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• Methods to Validate User Supplied Data

  - by clifgray

  I am working on a website where users record data from certain locations and they input an address to tag that location with a GPS coordinate. Pretty frequently those locations are tagged more than a mile away from the actual location and I am trying to implement a few ways to validate the data. Right now I am thinkiing of: having a tag of location pages for other users to say "incorrect location" so I can go one by one and fix it letting users with a decent amount of experience (reputation) edit the location GPS coordinates making the location be validated by a mod before it goes live and they make sure it is a good location Are these reasonable? I know the first will take a lot of my time and I would love some suggestions.

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• Friday Fun: Play Your Favorite 8-Bit NES Games Online

  - by Mysticgeek

  We finally made it to another Friday and once again we bring you some NES fun to waste the rest of the day before the weekend. Today we take a look at a site that contains a lot of classic NES games you can play online. vNES VirtualNES.com contains hundreds of vintage NES games you can play online. If you’re old enough to remember, when the NES came out, it breathed life back into home console gaming. Here we will take a look at a few of the games they offer that will certainly bring back memories. Super Mario Bros 3 which is a personal favorite from the 8-bit era.   Play Super Mario Bros 3 Excite Bike was one of the coolest dirt bike racing games at the time as it even allowed you to create your own tracks.   Play ExciteBike Of course The Legend of Zelda was one of the first fantasy games many an hour have been spent on. Play The Legend of Zelda We’d be remiss if we didn’t bring up Pac-man since the game recently celebrated it’s 30th anniversary. Play Pac-Man If you don’t like the default keyboard controls you can change them on the Options page. Join their forum and more…this site will definitely bring you back to the good old 8-bit NES days.   The site contains hundreds of different games for you to get on your old school NES fix. If you’re sick of waiting for the whistle to blow, this site will bring you back to the good old days when you had nothing to do but mash buttons all day. Play NES Games at virtualnes.com Similar Articles Productive Geek Tips Friday Fun: Get Your Mario OnFriday Fun: Go Retro with PacmanFriday Fun: Five More Time Wasting Online GamesFriday Fun: Online Flash Games to Usher in the WeekendFriday Fun: Online Sports Flash Games TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips HippoRemote Pro 2.2 Xobni Plus for Outlook All My Movies 5.9 CloudBerry Online Backup 1.5 for Windows Home Server Awesome World Cup Soccer Calendar Nice Websites To Watch TV Shows Online 24 Million Sites Windows Media Player Glass Icons (icons we like) How to Forecast Weather, without Gadgets Outlook Tools, one stop tweaking for any Outlook version

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• SSIS: Building SQL databases on-the-fly using concatenated SQL scripts

  - by DrJohn

  Over the years I have developed many techniques which help automate the whole SQL Server build process. In my current process, where I need to build entire OLAP data marts on-the-fly, I make regular use of a simple but very effective mechanism to concatenate all the SQL Scripts together from my SSMS (SQL Server Management Studio) projects. This proves invaluable because in two clicks I can redeploy an entire SQL Server database with all tables, views, stored procedures etc. Indeed, I can also use the concatenated SQL scripts with SSIS to build SQL Server databases on-the-fly. You may be surprised to learn that I often redeploy the database several times per day, or even several times per hour, during the development process. This is because the deployment errors are logged and you can quickly see where SQL Scripts have object dependency errors. For example, after changing a table structure you may have forgotten to change any related views. The deployment log immediately points out all the objects which failed to build so you can fix and redeploy the database very quickly. The alternative approach (i.e. doing changes in the database directly using the SSMS UI) would require you to check all dependent objects before making changes. The chances are that you will miss something and wonder why your app returns the wrong data – a common problem caused by changing a table without re-creating dependent views. Using SQL Projects in SSMS A great many developers fail to make use of SQL Projects in SSMS (SQL Server Management Studio). To me they are invaluable way of organizing your SQL Scripts. The screenshot below shows a typical SSMS solution made up of several projects – one project for tables, another for views etc. The key point is that the projects naturally fall into the right order in file system because of the project name. The number in the folder or file name ensures that the projects the SQL scripts are concatenated together in the order that they need to be executed. Hence the script filenames start with 100, 110 etc. Concatenating SQL Scripts To concatenate the SQL Scripts together into one file, I use notepad.exe to create a simple batch file (see example screenshot) which uses the TYPE command to write the content of the SQL Script files into a combined file. As the SQL Scripts are in several folders, I simply use several TYPE command multiple times and append the output together. If you are unfamiliar with batch files, you may not know that the angled bracket (>) means write output of the program into a file. Two angled brackets (>>) means append output of this program into a file. So the command-line DIR > filelist.txt would write the content of the DIR command into a file called filelist.txt. In the example shown above, the concatenated file is called SB_DDS.sql If, like me you place the concatenated file under source code control, then the source code control system will change the file's attribute to "read-only" which in turn would cause the TYPE command to fail. The ATTRIB command can be used to remove the read-only flag. Using SQLCmd to execute the concatenated file Now that the SQL Scripts are all in one big file, we can execute the script against a database using SQLCmd using another batch file as shown below: SQLCmd has numerous options, but the script shown above simply executes the SS_DDS.sql file against the SB_DDS_DB database on the local machine and logs the errors to a file called SB_DDS.log. So after executing the batch file you can simply check the error log to see if your database built without a hitch. If you have errors, then simply fix the source files, re-create the concatenated file and re-run the SQLCmd to rebuild the database. This two click operation allows you to quickly identify and fix errors in your entire database definition.Using SSIS to execute the concatenated file To execute the concatenated SQL script using SSIS, you simply drop an Execute SQL task into your package and set the database connection as normal and then select File Connection as the SQLSourceType (as shown below). Create a file connection to your concatenated SQL script and you are ready to go.   Tips and TricksAdd a new-line at end of every fileThe most common problem encountered with this approach is that the GO statement on the last line of one file is placed on the same line as the comment at the top of the next file by the TYPE command. The easy fix to this is to ensure all your files have a new-line at the end.Remove all USE database statementsThe SQLCmd identifies which database the script should be run against.  So you should remove all USE database commands from your scripts - otherwise you may get unintentional side effects!!Do the Create Database separatelyIf you are using SSIS to create the database as well as create the objects and populate the database, then invoke the CREATE DATABASE command against the master database using a separate package before calling the package that executes the concatenated SQL script.    

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• Valid concerns over shared developer team

  - by alphadogg

  Say your company is committed (and don't want to consider not doing this) to sharing/pooling a development team across a handful of business units. What would you setup as concerns/expectations that must be cleared before doing this? For example: Need agreement between units on how much actual time (FTE) is allocated to each unit Need agreement on scheduling of staff need agreement on request procedure if extra time is required by one party etc... Have you been in a situation like this as a manager of one unit destined to use this? If so, what were problems you experienced? What would you have or did implement? Same if you were the manager of the shared team. Please assume, for discussion, that the people concerned know that you can swap devs in and out on a whim. I don't want to know the disadvantages of this approach; I know them. I want to anticipate issues and know how to mitigate the fallout.

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• Which tool to use for "home banking"?

  - by Huygens

  I would like to manage my bank accounts in a secure manner on Ubuntu. I saw several applications in the Software Centre, but I don't know which one to choose. I don't need fancy features like stock options. I just have regular accounts which I want to follow, I don't want complicated stuff. As bank data are quite sensitive, I would highly prefer an application that does encryption of the data. Though, if you have a really cool app but it does not have this feature, as long as it offers to store the data in one dedicated place, I could do with encrypting that place. So what tool do you use that could fit my needs?

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• Feedback on AZGroups Feedback Form

  Next Monday is the 7th Annual day of .net with Scott Guthrie. I’ve been doing this event for many years and this year (for the first time) I’ll be asking for a feedback / eval form to be turned in at the end of the day. In true community fashion, I would like to ask your feedback on my feedback form. Please be constructive. I know that filling out forms seems silly on a one-by-one basis, but collectively the stats can really help, and I will personally read and evaluate each form, so...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• git, maven and jenkins - versioning, dev and release builds workflow

  - by varesa

  What is the preferred way to do the following with git, maven and jenkins: I am developping an application, which I would like to maintain "dev" and "release" branches. I would like jenkins to build both. It could be so that the release-artifacts would have versions like 1.5.2 and the dev-builds would just be 0.0.1-SNAPSHOTs. I would like to not have to have 2 different pom.xml files. I looked into profiles, but they don't seem to be able to change artifact versions. One way I looked at could be adding a 'qualifier' to the test-builds. Of course I could just rename the file, because the real artifact-information on this is not important, because the app is a standalone one. What would be the preferred way to doing this? Or how would you do this?

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• Real-world SignalR example, ditching ghetto long polling

  - by Jeff

  One of the highlights of BUILD last week was the announcement that SignalR, a framework for real-time client to server (or cloud, if you will) communication, would be a real supported thing now with the weight of Microsoft behind it. Love the open source flava! If you aren’t familiar with SignalR, watch this BUILD session with PM Damian Edwards and dev David Fowler. Go ahead, I’ll wait. You’ll be in a happy place within the first ten minutes. If you skip to the end, you’ll see that they plan to ship this as a real first version by the end of the year. Insert slow clap here. Writing a few lines of code to move around a box from one browser to the next is a way cool demo, but how about something real-world? When learning new things, I find it difficult to be abstract, and I like real stuff. So I thought about what was in my tool box and the decided to port my crappy long-polling “there are new posts” feature of POP Forums to use SignalR. A few versions back, I added a feature where a button would light up while you were pecking out a reply if someone else made a post in the interim. It kind of saves you from that awkward moment where someone else posts some snark before you. While I was proud of the feature, I hated the implementation. When you clicked the reply button, it started polling an MVC URL asking if the last post you had matched the last one the server, and it did it every second and a half until you either replied or the server told you there was a new post, at which point it would display that button. The code was not glam: // in the reply setup PopForums.replyInterval = setInterval("PopForums.pollForNewPosts(" + topicID + ")", 1500); // called from the reply setup and the handler that fetches more posts PopForums.pollForNewPosts = function (topicID) { $.ajax({ url: PopForums.areaPath + "/Forum/IsLastPostInTopic/" + topicID, type: "GET", dataType: "text", data: "lastPostID=" + PopForums.currentTopicState.lastVisiblePost, success: function (result) { var lastPostLoaded = result.toLowerCase() == "true"; if (lastPostLoaded) { $("#MorePostsBeforeReplyButton").css("visibility", "hidden"); } else { $("#MorePostsBeforeReplyButton").css("visibility", "visible"); clearInterval(PopForums.replyInterval); } }, error: function () { } }); }; What’s going on here is the creation of an interval timer to keep calling the server and bugging it about new posts, and setting the visibility of a button appropriately. It looks like this if you’re monitoring requests in FireBug: Gross. The SignalR approach was to call a message broker when a reply was made, and have that broker call back to the listening clients, via a SingalR hub, to let them know about the new post. It seemed weird at first, but the server-side hub’s only method is to add the caller to a group, so new post notifications only go to callers viewing the topic where a new post was made. Beyond that, it’s important to remember that the hub is also the means to calling methods at the client end. Starting at the server side, here’s the hub: using Microsoft.AspNet.SignalR.Hubs; namespace PopForums.Messaging { public class Topics : Hub { public void ListenTo(int topicID) { Groups.Add(Context.ConnectionId, topicID.ToString()); } } } Have I mentioned how awesomely not complicated this is? The hub acts as the channel between the server and the client, and you’ll see how JavaScript calls the above method in a moment. Next, the broker class and its associated interface: using Microsoft.AspNet.SignalR; using Topic = PopForums.Models.Topic; namespace PopForums.Messaging { public interface IBroker { void NotifyNewPosts(Topic topic, int lasPostID); } public class Broker : IBroker { public void NotifyNewPosts(Topic topic, int lasPostID) { var context = GlobalHost.ConnectionManager.GetHubContext<Topics>(); context.Clients.Group(topic.TopicID.ToString()).notifyNewPosts(lasPostID); } } } The NotifyNewPosts method uses the static GlobalHost.ConnectionManager.GetHubContext<Topics>() method to get a reference to the hub, and then makes a call to clients in the group matched by the topic ID. It’s calling the notifyNewPosts method on the client. The TopicService class, which handles the reply data from the MVC controller, has an instance of the broker new’d up by dependency injection, so it took literally one line of code in the reply action method to get things moving. _broker.NotifyNewPosts(topic, post.PostID); The JavaScript side of things wasn’t much harder. When you click the reply button (or quote button), the reply window opens up and fires up a connection to the hub: var hub = $.connection.topics; hub.client.notifyNewPosts = function (lastPostID) { PopForums.setReplyMorePosts(lastPostID); }; $.connection.hub.start().done(function () { hub.server.listenTo(topicID); }); The important part to look at here is the creation of the notifyNewPosts function. That’s the method that is called from the server in the Broker class above. Conversely, once the connection is done, the script calls the listenTo method on the server, letting it know that this particular connection is listening for new posts on this specific topic ID. This whole experiment enables a lot of ideas that would make the forum more Facebook-like, letting you know when stuff is going on around you.

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• Pros and cons of using Grails compared to pure Groovy

  - by shabunc

  Say, you (by you I mean an abstract guy, any guy in your team) have experience of writing and building java web apps, know about filters, servlet mappings and so on, and so on. Also, let us assume you know pretty well any sql db, no matter which one exactly, whether it mysql, oracle or psql. At last, let pretend we know Groovy and its standard libraries, for example all that JsonBuilder and XmlSlurper stuff, so we don't need grails converters. The question is - what are benefits of using grails in this case. I'm not trying to start flame war, I'm just asking to compare - what are ups and downs of grails development compared to pure groovy one. For instance, off the top of my head I can name two pluses - automatic DB mapping and custom gsp tags. But when I want to write a modest app which provides small API for handling some well defined set of data, I'm totally OK with groovy's awesome SQL support. As for gsp, we does not use it at all, so we are not interested in custom tags as well.

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• How to get paid and figure out if I want to keep this client [migrated]

  - by Heiner Fawkes

  I have a client who is not paying on time, but it looks like the specifics don't match similar questions on this SE site. I got a call from a client I did website work for years ago. I had not done this kind of work for many years and frankly I'm not sure I want to now, but nevertheless about a month ago I agreed to bring his website, SEO, social media, and overall marketing for his small business up to speed. Why? He has told me many times how I'm the most honest, most well-informed contractor he's had experience with. And I personally kind of like him too. So I started working on an hourly basis. I sent one very small invoice and got paid. Then we talked a whole lot about all sorts of feature he would like me to implement. I started that work, and sent a second invoice on the first of the month (one of my two stated billing days). I didn't get paid. On every invoice it states that I charge a whopping ten percent per week late. I sent many voicemails and emails asking to please let me know what's going on with payment, and didn't get replies. Then the 15th of the month rolled around (which I stated initially as one of my invoicing dates). Since I hadn't been paid for the last invoice, I simply didn't send him an invoice at that time but emailed him and said that I will combine it with the next scheduled invoice for this reason (probably a bad idea I realize). Eventually he sent a portion of the invoice payment. I emailed back to let him know that he's three weeks late and what the remaining balance is. Finally we got in touch via phone. He basically told me that he thought I hadn't done all of the work I said I did. He looked at the page source code and it didn't look complete to him. I explained why his perception would be different and what work I had done as specified. He accepted this and said that part of the reason he didn't pay in full is that he's been swamped with personal family stuff, and part of the reason is that he didn't think I did all the work. That struck me as pretty weird. He also expressed concern that he has no idea now how much all the changes he has asked for are going to cost. And once again, he told me how honest and high-quality my services are compared to others he has dealt with. He also said he would pay me more (but not all) of the now three weeks overdue invoice that day. I didn't receive any payment. Basically this is how the client relationship strikes me: He's not good at communication. He's very busy and English isn't his first language. He almost never replies to emails but phone calls are fine. He's asked me to avoid emails for communication and I've asked him to please use email. He might not have enough money to afford all the things he has asked for. But so far I have been working for an hourly fee (which is quite high). He also has started paying monthly for hosting and social media services from me. What seems very abnormal is for a client to be so overdue on payments and to actually withhold payment of an invoice without any communication because he didn't think the work was done. I told him that I will send dollar estimates of each module of remaining work so that we can decide which ones are the highest priority if he cannot afford them all. I also reiterated that in the future if he has doubts about the work or an inability to pay, he must contact me immediately to say so. I basically plan to state the following to him: I would like to work for him and help his business. I also have sympathy for his recent family difficulties. I am happy to figure out payment plans that would work better for him, but first I need to be paid in full for all outstanding invoices, especially given that I skipped one of them just to be nice. The most crucial thing I need is communication about any problems with my work or his ability to pay. Once again, he heeds to pay in full immediately before we negotiate anything else. Does the above seem like an appropriate communication? Is anything missing from it? Is anything I'm doing here really abnormal?

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• Looking for tips on managing complexity with SCM repositories

  - by Philip Regan

  I am a solo developer in my department and I have a lot of individual projects, all created and managed by me. I started using SVN at ProjectLocker via Versions on the Mac a couple years ago when the variety of projects started getting unwieldy. Scenario 1: Now I have a process that is of reasonable complexity it can be broken up into multiple smaller applications and they all share files. In one phase, there is a single shared file—a constants file—that is shared between a Cocoa app and an iPhone app framework. In the second phase, the iPhone app framework will be used to create individual apps of the same ilk—controller classes and what not will all be the same—but with different content in each. The problem that I am running across is that the file in the first phase is in one repository with the application that started it, and the app framework is in a second, separate repository. Scenario 2: I have another application framework that partially relies on code from an open source project. This is all internal, non-commerical work, but again, the application framework is going to be used to create a variety of unique products and processes. So, now I have an internally managed repository and an externally managed one out of my control. I make little changes to the open source code to meet the needs of my framework when there is an update I download, but I never commit back into the external repository (though, now that I think about it, I don't think I'm committing it to mine either. Oops). The Problem I have all of this set up on my production Mac quite nicely, but duplicating and subsequently maintaining that environment on my laptop has been challenging. For Scenario 1, I've thought of merging these two projects together into the same repository because they are, for all intents and purposes inextricably linked. But, Scenario 2, I think I'm stuck just managing files as best I can. The Question I'm wondering if anyone has any tips on how to manage either of these situations, as well as other complex SCM scenarios when it comes to linking various files from various repositories together. My familiarity with SVN only comes from my work with Versions. It's been great, but I'm a little out of my depth here.

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• We Are SQLFamily

  - by AllenMWhite

  On Monday, Tom LaRock ( b /@sqlrockstar) presented his #MemeMonday topic as What #SQLFamily Means To Me . The #sqlfamily hash tag is a relatively new one, but is amazingly appropriate. I've been working with relational databases for almost 20 years, and for most of that time I've been the lone DBA. The only one to set things up, explain how things work, fix the problems, make it go faster, etc., etc., yadda, yadda, yadda. I enjoy being 'the guy', but at the same time it gets hard. What if I'm wrong?...(read more)

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• How to use Google Analytics to track a development and production versions of the same site on different servers?

  - by Abe

  I have a website with two versions, one for production and one for development (testing new features). All of the code is under version control and the websites are on separate servers. Currently, I have the same Google Analytics Tracking code used on both sites. Since the code is under version control, it would be ideal to either have an if I am on production, use this code; else if on development server use that code clause. But I suspect that Google makes it easier to do something like this. I see that there are many ways to configure a GA tracking code, e.g. "a single domain" vs. "multiple top level domains". But it is not clear to me how to set this up. Also, if tracking code configured for a single domain has been on the development server, have I been picking up traffic to both sites, or does GA just ignore the second domain that I haven't registered?

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