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• My Tech Ed North America Preview - Certification Edition

  - by Chris Gardner

  In my previous TechEd North America Preview, I addressed all the content I wanted to see at the show. This time, we shall turn our attention to the certifications I might try to pick up. If you have never been to TechEd North America before, one of the greatest things about the event is an on-site certification center. If you have a couple hours to spare, you can walk up to a test. The first test on my agenda is 70-5231. I took this update test once, but did not do well on the MVC portion2. A few practice tests later, and I think I'm ready to fake that section. After that, I need to complete my road to being a master. The good folks here at work have been having a real love / hate relationship with the idea of me become an MCM in SQL Server3. Of course, before I do that, I need to finally take the SQL Administration tests. Thus, we shall add 70-4324 and 70-4505 to the list. Speaking of MCM, TechEd North America will have a special on test 88-9706. This test is normally $500, and you have to find a place to take it7. However, there is a special 50% off rate for people who take it on location. With those kind of prices, I may just take it as a form of study guide. As a final push, I may take some Windows Phone exams. I mentioned in my previous post that I may attend the 70-5998 Exam Cram session. Unfortunately, I will be staffing the Hands-On-Lab at that time. As we know, this has never stopped me from taking a test. This may lead to fits of 70-5069, but after we've come this far... That should complete my list. Do I really think I'll find time to take 6 tests at TechEd North America? Probably not. I have done it at TechEd North America before, but that was before I was TechEd North America staff. I also had a co-worker pass 9 in one year, but he basically did nothing but travel to Orlando in 2007 to take tests. And what's the point of attending a HUGE conference if you don't network? Of course, networking will have to wait for Friday's post... 1 Upgrade: Transition Your MCPD .NET Framework 3.5 Web Developer Skills to MCPD .NET Framework 4 Web Developer 2Because I never have used, nor do I really think I ever will use, MVC... 3By that, I mean they love the idea, and they hate the price 4Microsoft SQL Server 2008, Implementation and Maintenance 5PRO: Designing, Optimizing and Maintaining a Database Administrative Solution Using Microsoft SQL Server 2008 6SQL Server 2008 Microsoft Certified Master: Knowledge Exam 7Which isn't nearly as expensive as the Lab Exam, nor as difficult to find a location. However, it is not offered at every testing facility. 8PRO: Designing and Developing Windows Phone Applications 9TS: Silverlight 4, Development

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• Developer Training – 6 Online Courses to Learn SQL Server, MySQL and Technology

  - by Pinal Dave

  Video courses are the next big thing and I am so happy that I have so far authored 6 different video courses with Pluralsight. Here is the list of the courses. I have listed all of my video courses over here. Note: If you click on the courses and it does not open, you need to login to Pluralsight with a valid username and password or sign up for a FREE trial. Please leave a comment with your favorite course in the comment section. Random 10 winners will get surprise gift via email. Bonus: If you list your favorite module from the course site. SQL Server Performance: Introduction to Query Tuning SQL Server performance tuning is an in-depth topic, and an art to master. A key component of overall application performance tuning is query tuning. Writing queries in an efficient manner, and making sure they execute in the most optimal way possible, is always a challenge. The basics revolve around the details of how SQL Server carries out query execution, so the optimizations explored in this course follow along the same lines. Click to View Course SQL Server Performance: Indexing Basics Indexes are the most crucial objects of the database. They are the first stop for any DBA and Developer when it is about performance tuning. There is a good side as well evil side of the indexes. To master the art of performance tuning one has to understand the fundamentals of the indexes and the best practices associated with the same. This course is for every DBA and Developer who deals with performance tuning and wants to use indexes to improve the performance of the server. Click to View Course SQL Server Questions and Answers This course is designed to help you better understand how to use SQL Server effectively. The course presents many of the common misconceptions about SQL Server, and then carefully debunks those misconceptions with clear explanations and short but compelling demos, showing you how SQL Server really works. This course is for anyone working with SQL Server databases who wants to improve her knowledge and understanding of this complex platform. Click to View Course MySQL Fundamentals MySQL is a popular choice of database for use in web applications, and is a central component of the widely used LAMP open source web application software stack. This course covers the fundamentals of MySQL, including how to install MySQL as well as written basic data retrieval and data modification queries. Click to View Course Building a Successful Blog Expressing yourself is the most common behavior of humans. Blogging has made easy to express yourself. Just like a letter or book has a structure and formula, blogging also has structure and formula. In this introductory course on blogging we will go over a few of the basics of blogging and show the way to get started with blogging immediately. If you already have a blog, this course will be even more relevant as this will discuss many of the common questions and issue you face in your blogging routine. Click to View Course Introduction to ColdFusion ColdFusion is rapid web application development platform. In this course you will learn the basics of how to use ColdFusion platform and rapidly develop web sites. The course begins with learning basics of ColdFusion Markup Language and moves to common development language practices. From there we move to frequent database operations and advanced concepts of Forms, Sessions and Cookies. The last module sums up all the concepts covered in the course with sample application. Click to View Course Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQL Training, T SQL, Technology

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• GoldenGate 12c - MySQL Active-Active Replication Setup

  - by Jinyu Wang-Oracle

  Active-active  (also called Master-Master or Bi-Directional) replication captures data changes from two or more systems and replicat the changes to synchronize the data.  Active-Active replication is often needed for high availability, load balancing and scaling out purposes.   Oracle GoldenGate is known to be one of the first and the best replication tool handling active-active replications. As of Oracle GoldenGate 12c, it provides (Refer to Oracle GoldenGate 12.1.2 Documentation - Configuring Oracle GoldenGate for Active-Active High Availability for more information) the followings: Robust loop-back prevention Comprehensive conflict resolution and detection support Heterogeneous support across different database versions and operation systems.  Oracle GoldenGate supports active-active configurations for DB2 on z/OS, LUW, and IBM i, MySQL, Oracle, SQL/MX,SQL Server, Sybase, and Teradata. However, the setup is different from database to database. In this example, I will show you how to setup an active-active data replication between two MySQL database instances. The example setup below is to have active-active replication between MySQL 5.5 and MySQL 5.6 instances and is shown as follows: MySQL 5.5 (Manager Port: 15105)  Extract EXTRACT demoex01 SETENV (MYSQL_UNIX_PORT='/home/oracle/software/mysql_5.5.38/data/mysql.sock') DBOPTIONS CONNECTIONPORT 3305 DBOPTIONS HOST oraclelinux6.localdomain SOURCEDB test USERID root, PASSWORD mysql EXTTRAIL ./dirdat/extract/de TRANLOGOPTIONS ALTLOGDEST "/home/oracle/software/mysql_5.5.38/data/binlog/bin-log.index" FILTERTABLE test.checkpoint_tbl REPORTROLLOVER AT 05:30 ON saturday TABLE test.TCUSTMER; TABLE test.TCUSTORD; Pump EXTRACT demopm01 RMTHOST localhost, MGRPORT 15106, COMPRESS, TIMEOUT 30 RMTTRAIL ./dirdat/replicat/ps PASSTHRU TABLE test.TCUSTMER; TABLE test.TCUSTORD; Replicat replicat demorp01 setenv (MYSQL_UNIX_PORT='/home/oracle/software/mysql_5.5.38/data/mysql.sock') dboptions host oraclelinux6.localdomain, connectionport 3305 targetdb test, userid root, password mysql sourcedefs ./dirdat/replicat/democust.def discardfile ./dirrpt/demprp01.dsc, purge REPERROR (DEFAULT, ABEND) REPERROR(1062, IGNORE) map test.TCUSTMER, target test.TCUSTMER,colmap(usedefaults, region_code="region code"); map test.TCUSTORD, target test.TCUSTORD; MySQL 5.6 (Manager Port: 15106) Replicat replicat demorp01 setenv (MYSQL_UNIX_PORT='/home/oracle/software/mysql_5.6.19/data/mysql.sock') dboptions host oraclelinux6.localdomain, connectionport 3306 targetdb test, userid root, password mysql --assumetargetdefs sourcedefs ./dirdat/replicat/democust.def discardfile ./dirrpt/demprp01.dsc, purge map test.TCUSTMER, target test.TCUSTMER, colmap(usedefaults, "region code"=region_code); map test.TCUSTORD, target test.TCUSTORD; Extract EXTRACT demoex01 SETENV (MYSQL_UNIX_PORT='/home/oracle/software/mysql_5.6.19/data/mysql.sock') DBOPTIONS CONNECTIONPORT 3306 DBOPTIONS HOST oraclelinux6.localdomain SOURCEDB test USERID root, USERID mysql EXTTRAIL ./dirdat/extract/de TRANLOGOPTIONS ALTLOGDEST "/usr/local/mysql56/data/binlog/bin-log.index" FILTERTABLE test.checkpoint_tbl TABLE test.TCUSTMER; TABLE test.TCUSTORD; Pump EXTRACT demopm01 RMTHOST localhost, MGRPORT 15105, COMPRESS, TIMEOUT 30 RMTTRAIL ./dirdat/replicat/ps PASSTHRU TABLE test.TCUSTMER; TABLE test.TCUSTORD; The setup parameters are quite self-explanatory. The key setup is to avoid the replication data  looping. Oracle GoldenGate for MySQL uses the information in the replication checkpoint table to identify the transaction applied by replicats and thus avoid extracting those transactions by Oracle GoldenGate extracts. The example setup in the extract in MySQL 5.5 instance is shown as follows.  TRANLOGOPTIONS ALTLOGDEST "/home/oracle/software/mysql_5.5.38/data/binlog/bin-log.index" FILTERTABLE test.checkpoint_tbl Setting up an active-active replication is often more complicated than this and requires the following additional considerations. I would elaborate on this in the follow-up discussions. 

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• SQL SERVER – How to Get SQL Server Restart Notification?

  - by Pinal Dave

  Few days back my friend called me to know if there is any tool which can be used to get restart notification about SQL in their environment. I told that SQL Server can do it by itself with some configurations. He was happy and surprised to know that he need not spend any extra money. In SQL Server, we can configure stored procedure(s) to run at start-up of SQL Server. This blog would give steps to achieve how to achieve it. There are many situations where this feature can be used. Below are few. Logging SQL Server startup timings Modify data in some table during startup (i.e. table in tempdb) Sending notification about SQL start. Step 1 – Enable ‘scan for startup procs’ This can be done either using T-SQL or User Interface of Management Studio. EXEC sys.sp_configure N'Show Advanced Options', N'1' GO RECONFIGURE WITH OVERRIDE GO EXEC sys.sp_configure N'scan for startup procs', N'1' GO RECONFIGURE WITH OVERRIDE GO Below is the interface to change the setting. We need to go to “Server” > “Properties” and use “Advanced” tab. “Scan for Startup Procs” is the parameter under “Miscellaneous” section as shown below. We need to make value as “True” and hit OK. Step 2 – Create stored procedure It’s important to note that the procedure is executed after recovery is finished for ALL databases. Here is a sample stored procedure. You can use your own logic in the procedure. CREATE PROCEDURE SQLStartupProc AS BEGIN CREATE TABLE ##ThisTableShouldAlwaysExists (AnyColumn INT) END Step 3 – Set Procedure to run at startup We need to use sp_procoption to mark the procedure to run at startup. Here is the code to let SQL know that this is startup proc. sp_procoption 'SQLStartupProc', 'startup', 'true' This can be used only for procedures in master database. Msg 15398, Level 11, State 1, Procedure sp_procoption, Line 89 Only objects in the master database owned by dbo can have the startup setting changed. We also need to remember that such procedure should not have any input/output parameter. Here is the error which would be raised. Msg 15399, Level 11, State 1, Procedure sp_procoption, Line 107 Could not change startup option because this option is restricted to objects that have no parameters. Verification Here is the query to find which procedures is marked as startup procedures. SELECT name FROM sys.objects WHERE OBJECTPROPERTY(OBJECT_ID, 'ExecIsStartup') = 1 Once this is done, I have restarted SQL instance and here is what we would see in SQL ERRORLOG Launched startup procedure 'SQLStartupProc'. This confirms that stored procedure is executed. You can also notice that this is done after all databases are recovered. Recovery is complete. This is an informational message only. No user action is required. After few days my friend again called me and asked – I want to turn this OFF? Use comments section and post the answer for him.  Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQL Utility, T SQL

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• Mastering snow and Java development at jDays in Gothenburg

  - by JavaCecilia

  Last weekend, I took the train from Stockholm to Gothenburg to attend and present at the new Java developer conference jDays. It was professionally arranged in the Swedish exhibition hall close to the amusement park Liseberg and we got a great deal out of the top-level presenters and hallway discussions. Understanding and Improving Your Java Process Our main purpose was to spread information on JVM and our monitoring tools for Java processes, so I held a crash course in the most important terms and concepts if you want to affect the performance of your Java process. From the beginning - the JVM specification to interpretation of heap usage graphs. For correct analysis, you also need to understand something about process memory - you need space for the Java heap (-Xms for initial size and -Xmx for max heap size), but the process memory also contain the thread stacks (to a size of -Xss), JVM internal data structures used for keeping track of Java objects on the heap, method compilation/optimization, native libraries, etc. If you get long pause times, make sure to monitor your application, see the allocation rate and frequency of pause times.My colleague Klara Ward then held a presentation on the Java Mission Control product, the profiling and diagnostics tools suite for HotSpot, coming soon. The room was packed and very appreciated, Klara demonstrated four different scenarios, e.g. how to diagnose and fix latencies due to lock contention for logging.My German colleague, OpenJDK ambassador Dalibor Topic travelled to Sweden to do the second keynote on "Make the Future Java". He let us in on the coming features and roadmaps of Java, now delivering major versions on a two-year schedule (Java 7 2011, Java 8 2013, etc). Also letting us in on where to download early versions of 8, to report problems early on. Software Development in teams Being a scout leader, I'm drilled in different team building and workshop techniques, creating strong groups - of course, I had to attend Henrik Berglund's session on building successful teams. He spoke about the importance of clear goals, autonomy and agreed processes. Thomas Sundberg ended the conference by doing live remote pair programming with Alex in Rumania and a concrete tips for people wanting to try it out (for local collaboration, remember to wash and change clothes). Memory Master Keynote The conference keynote was delivered by the Swedish memory master Mattias Ribbing, showing off by remembering the order of a deck of cards he'd seen once. He made it interactive by forcing the audience to learn a memory mastering technique of remembering ten ordered things by heart, asking us to shout out the order backwards and we made it! I desperately need this - bought the book, will get back on the subject. Continuous Delivery The most impressive presenter was Axel Fontaine on Continuous Delivery. Very well prepared slides with key images of his message and moved about the stage like a rock star. The topic is of course highly interesting, how to create an infrastructure enabling immediate feedback to developers and ability to release your product several times per day. Tomek Kaczanowski delivered a funny and useful presentation on good and bad tests, providing comic relief with poorly written tests and the useful rules of thumb how to rewrite them. To conclude, we had a great time and hope to see you at jDays next year :)

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• Move over DFS and Robocopy, here is SyncToy!

  - by andywe

  Ever since Windows 2000, I have always had the need to replicate data to multiple endpoints with the same content. Until DFS was introduced, the method of thinking was to either manually copy the data location by location, or to batch script it with xcopy and schedule a task. Even though this worked (and still does today), it was cumbersome, and intensive on the network, especially when dealing with larger amounts of data. Then along came robocopy, as an internal tool written by an enterprising programmer at Microsoft. We used it quite a bit, especially when we could not use DFS in the early days. It was received so well, it made it into the public realm. At least now we could have the ability to determine what files had changed and only replicate those. Well, over time there has been evolution of this ideal. DFS is obviously the Windows enterprise class service to do this, along with BrancheCache..however you don’t always need or want the power of DFS, especially when it comes to small datacenter installations, or remote offices. I have specific data sets that are on closed or restricted networks, that either have a security need for this, or are in remote countries where bandwidth is a premium. FOr this, I use the latest evolution for one off replication names Synctoy. Synctoy is from Microsoft, seemingly released in 2009, that wraps a nice GUI around setting up a paired set of folders (remember the mobile briefcase from Windows 98?), and allowing you the choice of synchronization methods. 1 way, or 2 way. Simply create a paired set of folders on the source and destination, choose your options for content, exclude any file types you don’t want to replicate, and click run. Scheduling is even easier. MS has included a wrapper for doing just this so all you enter in your task schedule in the SynToyCMD.exe, a –R as an argument, and the time schedule. No more complicated command lines or scripts.   I find this especially useful when I use MS backup to back up a system volume, but only want subsets of backup information of a data share and ONLY when that dataset has changed. Not relying on full backups and incremental. An example of this is my application installation master share. I back this up with SyncToy because I do not need multiple backup copies..one copy elsewhere suffices to back it up. At home, very useful for your pictures, videos, music, ect..the backup is online and ready to access, not waiting for you to restore a backup file, and no need to institute a domain simply to have DFS.'   Do note there is a risk..if you accidently delete a file and do not catch this before the next sync, then depending on your SyncToy settings, you can indeed lose that file as the destination updates..so due diligence applies. I make it a rule to sync manly one way…I use my master share for making changes, and allow the schedule to follow suit. Any real important file I lock down as read only through file permissions so it cannot be deleted unless I intervene.   Check out the tool and have some fun! http://www.microsoft.com/en-us/download/details.aspx?DisplayLang=en&id=15155

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

  - by black_puppydog

  I am beginning the development of a broser based game in which players take certain actions at any point in time. Big parts of gameplay will be happening in real life and just have to be entered into the system. I believe a good kind of comparison might be a platform for managing fantasy football, although I have virtually no experience playing that, so please correct me if I am mistaken here. The point is that some events happen in the program (i.e. on the server, out of reach for the players) like pulling new results from some datasource, starting of a new round by a game master and such. Other events happen in real life (two players closing a deal on the transfer of some team member or whatnot - again: have never played fantasy football) and have to be entered into the system. The first part is pretty easy since the game masters will be "staff" and thus can be trusted to a certain degree to not mess with the system. But the second part bothers me quite a lot, especially since the actions may involve multiple steps and interactions with different players, like registering a deal with the system that then has to be approved by the other party or denied and passed on to a game master to decide. I would of course like to separate the game logic as far as possible from the presentation and basic form validation but am unsure how to do this in a clean fashion. Of course I could (and will) put some effort into making my own architectural decisions and prototype different ideas. But I am bound to make some stupid mistakes at some point, so I would like to avoid some of that by getting a little "book smart" beforehand. So the question is: Is there any kind of architectural works that I can read up on? Papers, blogs, maybe design documents or even source code? Writing this down this seems more like a business application with business rules, workflows and such... Any good entry points for that? EDIT: After reading the first answers I am under the impression of having made a mistake when including the "MMO" part into the title. The game will not be all fancy (i.e. 3D or such) on the client side and the logic will completely exist on the server. That is, apart from basic form validation for the user which will also be mirrored on the server side. So the target toolset will be HTML5, JavaScript, probably JQuery(UI). My question is more related to the software architecture/design of a system that enforces certain rules. Separation of ruleset and presentation One problem I am having is that I want to separate the game rules from the presentation. The first step would be to make an own module for the game "engine" that only exposes an interface that allows all actions to be taken in a clean way. If an action fails with regard to some pre/post condition, the engine throws an exception which is then presented to the user like "you cannot sell something you do not own" or "after that you would end up in a situation which is not a valid game state." The problem here is that I would like to be able to not even present invalid action in the first place or grey out the corresponding UI elements. Changing and tweaking the ruleset Another big thing is the ruleset. It will probably evolve over time and most definitely must be tweaked. What's more, it should be possible (to a certain extent) to build a ruleset that fits a specific game round, i.e. choosing different kinds of behaviours in different aspects of the game. This would do something like "we play it with extension A today but we throw out extension B." For me, this screams "Architectural/Design pattern" but I have no idea on who might have published on something like this, not even what to google for.

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• Unable to install SQL 2008 on Windows 7

  - by Axel

  SQL 2008 install hangs on Windows 7 The story: Trying to install SQL2008 on Windows 7 hangs on SqlEngineDBStartconfigAction_install_configrc_Cpu32. What I Tried: Uninstall hangs on validation Manual uninstall using msiinv.exe and msiexec /x works Added SQL service accounts to local admins no help Turn of UAC no help Last lines in setup log: 2010-04-01 16:18:05 SQLEngine: : Checking Engine checkpoint 'GetSqlServerProcessHandle' 2010-04-01 16:18:05 SQLEngine: --SqlServerServiceSCM: Waiting for nt event 'Global\sqlserverRecComplete' to be created 2010-04-01 16:18:07 SQLEngine: --SqlServerServiceSCM: Waiting for nt event 'Global\sqlserverRecComplete' or sql process handle to be signaled 2010-04-01 16:18:07 SQLEngine: : Checking Engine checkpoint 'WaitSqlServerStartEvents' 2010-04-01 16:18:53 Slp: Sco: Attempting to initialize script 2010-04-01 16:18:53 Slp: Sco: Attempting to initialize default connection string 2010-04-01 16:18:53 Slp: Sco: Attempting to set script connection protocol to NotSpecified 2010-04-01 16:18:53 Slp: Sco: Attempting to set script connection protocol to NamedPipes 2010-04-01 16:18:53 SQLEngine: --SqlDatabaseServiceConfig: Connection String: Data Source=\.\pipe\SQLLocal\MSSQLSERVER;Initial Catalog=master;Integrated Security=True;Pooling=False;Network Library=dbnmpntw;Application Name=SqlSetup 2010-04-01 16:18:53 SQLEngine: : Checking Engine checkpoint 'ServiceConfigConnect' 2010-04-01 16:18:53 SQLEngine: --SqlDatabaseServiceConfig: Connecting to SQL.... 2010-04-01 16:18:53 Slp: Sco: Attempting to connect script 2010-04-01 16:18:53 Slp: Connection string: Data Source=\.\pipe\SQLLocal\MSSQLSERVER;Initial Catalog=master;Integrated Security=True;Pooling=False;Network Library=dbnmpntw;Application Name=SqlSetup And now comes the fun part: When I open conf mgr I can see the service running, I enabled named pipes and TCP/IP, restarted the service I'm able to connect to the server using an OLE DB connection but not with the Native Client. And what I find suspicious is the following error in my app log: .NET Runtime Optimization Service (clr_optimization_v2.0.50727_32) - Failed to compile: C:\Program Files\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\Tools\VDT\DataProjects.dll . Error code = 0x8007000b In MS connect this is reported as a bug but MS is unable to reproduce the problem altough when you search the fora I'm not the only one with this problem. So any help is appreciated.

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• Abcpdf throwing System.ExecutionEngineException

  - by Tom Tresansky

  I have the binary for several pdf files stored in a collection of Byte arrays. My goal is to concatenate them into a single .pdf file using abcpdf, then stream that newly created file to the Response object on a page of an ASP.Net website. Had been doing it like this: BEGIN LOOP ... 'Create a new Doc Dim doc As Doc = New Doc 'Read the binary of the current PDF doc.Read(bytes) 'Append to the master merged PDF doc _mergedPDFDoc.Append(Doc) END LOOP Which was working fine 95% of the time. Every now and then however, creating a new Doc object would throw a System.ExecutionEngineException and crash the CLR. It didn't seem to be related to a large number of pdfs (sometimes would happen w/ only 2), or with large sized pdfs. It seemed almost completely random. This is a known bug in abcpdf described (not very well) here Item 6.24. I came across a helpful SO post which suggested using a Using block for the abcpdf Doc object. So now I'm doing this: Using doc As New Doc 'Read the binary of the current PDF doc.Read(bytes) 'Append to the master merged PDF doc _mergedPDFDoc.Append(doc) End Using And I haven't seen the problem occur again yet, and have been pounding on a test version as best as I can to get it to. Has anyone had any similar experience with this error? Did this fix it?

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• AWS Amazon EC2 - password-less SSH login for non-root users using PEM keypairs

  - by Mark White

  We've got a couple of clusters running on AWS (HAProxy/Solr, PGPool/PostgreSQL) and we've setup scripts to allow new slave instances to be auto-included into the clusters by updating their IPs to config files held on S3, then SSHing to the master instance to kick them to download the revised config and restart the service. It's all working nicely, but in testing we're using our master pem for SSH which means it needs to be stored on an instance. Not good. I want a non-root user that can use an AWS keypair who will have sudo access to run the download-config-and-restart scripts, but nothing else. rbash seems to be the way to go, but I understand this can be insecure unless setup correctly. So what security holes are there in this approach: New AWS keypair created for user.pem (not really called 'user') New user on instances: user Public key for user is in ~user/.ssh/authorized_keys (taken by creating new instance with user.pem, and copying it from /root/.ssh/authorized_keys) Private key for user is in ~user/.ssh/user.pem 'user' has login shell of /home/user/bin/rbash ~user/bin/ contains symbolic links to /bin/rbash and /usr/bin/sudo /etc/sudoers has entry "user ALL=(root) NOPASSWD: ~user/.bashrc sets PATH to /home/user/bin/ only ~user/.inputrc has 'set disable-completion on' to prevent double tabbing from 'sudo /' to find paths. ~user/ -R is owned by root with read-only access to user, except for ~user/.ssh which has write access for user (for writing known_hosts), and ~user/bin/* which are +x Inter-instance communication uses 'ssh -o StrictHostKeyChecking=no -i ~user/.ssh/user.pem user@ sudo ' Any thoughts would be welcome. Mark...

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• CSS window height problem with dynamic loaded css

  - by Michael Mao

  Hi all: Please go here and use username "admin" and password "endlesscomic" (without wrapper quotes) to see the web app demo. Basically what I am trying to do is to incrementally integrate my work to this web app, say, every nightly, for the client to check the progress. Also, he would like to see, at the very beginning, a mockup about the page layout. I am trying to use the 960 grid system to achieve this. So far, so good. Except one issue that when the "mockup.css" is loaded dynamically by jQuery, it "extends" the window to the bottom, something I do not wanna have... As an inexperienced web developer, I don't know which part is wrong. Below is my js: /* master.js */ $(document).ready(function() { $('#addDebugCss').click(function() { alertMessage('adding debug css...'); addCssToHead('./css/debug.css'); $('.grid-insider').css('opacity','0.5');//reset mockup background transparcy }); $('#addMockupCss').click(function() { alertMessage('adding mockup css...'); addCssToHead('./css/mockup.css'); $('.grid-insider').css('opacity','1');//set semi-background transparcy for mockup }); $('#resetCss').click(function() { alertMessage('rolling back to normal'); rollbackCss(new Array("./css/mockup.css", "./css/debug.css")); }); }); function alertMessage(msg) //TODO find a better modal prompt { alert(msg); } function addCssToHead(path_to_css) { $('<link rel="stylesheet" type="text/css" href="' + path_to_css + '" />').appendTo("head"); } function rollbackCss(set) { for(var i in set) { $('link[href="'+ set[i]+ '"]').remove(); } } Something should be added to the exteral mockup.css? Or something to change in my master.js? Thanks for any hints/suggestions in advance.

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• jQuery UI dialog on ASP.NET page (inside user control)

  - by marc_s

  I have a really odd behavior here: I created a little popup dialog in jQuery UI, and in my test HTML page, it works flawlessly. When I click on the button, the popup comes up, covers the background, and remains on screen until I click on one of the two buttons (OK or Cancel) provided. So now I wanted to add this into my ASP.NET 3.5 app. I wanted to add it to a GridView inside a user controls (ASCX), which is on a page (ASPX) contained inside a master page. The jQuery 1.4.2 and jQuery UI 1.8.1 scripts are referenced on the master page: <body> <form id="XXXXXX" runat="server"> <Ajax:ScriptManager ID="masterScriptManager" runat="server" ScriptMode="Auto"> <Scripts> <asp:ScriptReference Path="~/Scripts/jquery-1.4.2.min.js" /> <asp:ScriptReference Path="~/Scripts/jquery-ui-1.8.1.custom.min.js" /> </Scripts> </Ajax:ScriptManager> I had to change this to use the Ajax script manager, since adding them to the as never worked. So in my gridview, I have a column with image buttons, and when the user clicks on those, I am calling a little javascript function to show the jQuery UI dialog: function showDialog() { $("#dlg-discount").dialog('open'); $("#txtAmount").focus(); } When I run this page in MS IE 8, I get a separate page, and at the top of the page, I get the contents of my , with proper background color and all. In Firefox 3.5.6, I do get the dialog as a popup. In both cases, the dialog page/popup disappears again after a second or less - without me clicking anything! It seems similar to this question but the solution provided there doesn't work in my case. This one here also seems similar but again: the solution presented doesn't seem to work in my case... Any ideas / hints / tips on what the h** is going on here?? Thanks!

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• error_log php.ini setting has no effect on IIS 7/FastCGI/Win7/PHP5.3.2

  - by Lucas

  I have a very strange problem with PHP 5.3.2 running on IIS 7 on a fresh Windows 7 installation. Changing the error_log configuration options in the php.ini does not seem to have any effect. I cannot change the option to point to anything other than the default location. Here is a portion of my php.ini file and the output from phpinfo() before and after changing some configuration options. Everything else seems to have taken effect except the error_log option. I have noticed that the fastcgi.logging option also appears to be stuck. A previous setup with PHP 5.3.2 on Win XP and IIS 5.5 exhibited no problems. Also, this seems to be a bit different than other PHP + error_log problems that have been posted as the configuration option is never even being recognized by PHP. display_errors = On log_errors = Off error_log = mylog.log magic_quotes_gpc = Off Directive Local Value Master Value --------------- ------------------------------ ------------ display_errors On On log_errors Off Off error_log C:\Windows\temp\php-errors.log C:\Windows\temp\php-errors.log magic_quotes_gpc Off Off After changing the configuration options to: display_errors = Off log_errors = On error_log = php_errors.log magic_quotes_gpc = On I get the following from phpinfo() Directive Local Value Master Value --------------- ------------------------------ ------------ display_errors Off Off log_errors On On error_log C:\Windows\temp\php-errors.log C:\Windows\temp\php-errors.log magic_quotes_gpc On On

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• cellForRowAtIndexPath not being called on tableView reloadData

  - by BotskoNet

  I have a UITableView on one view that loads in data at the start of the application, and then later when a user enters text into a box and hits a button, I re-query the database, re-populate the original NSMutableArray that stores the data for the table. All of that is working perfectly. In some logging statements I can tell that the array has the correct information, the numberOfRowsInSection method is returning the proper count, and is being called after the reload is called. However, the cellForRowAtIndexPath is never called the second time (after the reload) and the table data is never updated. I've spent hours searching the net and I've found nothing that helps. Can anyone help? All code is at: http://github.com/botskonet/inmyspot The specific reload is being called at: http://github.com/botskonet/inmyspot/blob/master/Classes/InMySpotViewController.m Roughly Line 94 From: http://github.com/botskonet/inmyspot/blob/master/Classes/PlateFormViewController.m Roughly line 101 A bit more info: once the new data has been added to the mutablearray, if I try to start scrolling the table, it eventually dies with: "Terminating app due to uncaught exception 'NSRangeException', reason: '* -[NSCFArray objectAtIndex:]: index (29) beyond bounds (29)'" Which I assume means the table cells can't find any data in the array to match the scroll position, which seems to be because the array has the new data, but the table doesn't.

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• ASP.Net MVC View and Controller file structure

  - by Jit

  I am very confused the View and corresponding controller has to be set in MVC 1.0 project structure. Currently in a default application we have About.aspx page under Home folder and all the controller action is handled in HomeController. This controller mixes up Home action and About action. It makes things messy. I like to have clear separation of my controller. Like to have one About Controller and HomeCotroller separately. For it I have create another folder "About" under view folder and place Aboput.aspx in it , otherwise we will get the error below. How can I achieve it ?? I like to have exact folder structure as in View, same as in Cotroller. The view 'About' or its master could not be found. The following locations were searched: ~/Views/About/About.aspx ~/Views/About/About.ascx ~/Views/Shared/About.aspx ~/Views/Shared/About.ascx Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidOperationException: The view 'About' or its master could not be found. The following locations were searched: ~/Views/About/About.aspx ~/Views/About/About.ascx ~/Views/Shared/About.aspx ~/Views/Shared/About.ascx I like to have folders like \iew\About.aspx and Cotroller\AboutController.cs or \View\Info\About.aspx and \Controller\Info\AboutController.cs. This will make my project and code very cleanly placed and good to maintain. Thanks in advance for helping

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• delphi Ado (mdb) update records

  - by ml

  I´m trying to copy data from one master table and 2 more child tables when i select one record in the master table i copy all the fields from that table for the other (table1 copy from ADOQuery the selected record) procedure TForm1.copyButton7Click(Sender: TObject); SQL.Clear; SQL.Add('SELECT * from ADOQuery'); SQL.Add('Where numeracao LIKE ''%'+NInterv.text);// locate record selected in Table1 NInterv.text) Open; // initiate copy of records begin while not tableADoquery.Eof do begin Table1.Last; Table1.Append;// how to append if necessary! Table1.Edit; Table1.FieldByName('C').Value := ADoquery.FieldByName('C').Value; Table1.FieldByName('client').Value := ADoquery.FieldByName('client').Value; Table1.FieldByName('Cnpj_cpf').Value := ADoquery.FieldByName('Cnpj_cpf').Value; table1.Post; table2.next;/// end; end; //How can i update the TableChield, TableChield1 field´s at the same time? do the same for the child tables TableChield <= TableChield_1 TableChield1 <= TableChield_2 thanks

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• Large Django application layout

  - by Rob Golding

  I am in a team developing a web-based university portal, which will be based on Django. We are still in the exploratory stages, and I am trying to find the best way to lay the project/development environment out. My initial idea is to develop the system as a Django "app", which contains sub-applications to separate out the different parts of the system. The reason I intended to make these "sub" applications is that they would not have any use outside the parent application whatsoever, so there would be little point in distributing them separately. We envisage that the portal will be installed in multiple locations (at different universities, for example) so the main app can be dropped into a number of Django projects to install it. We therefore have a different repository for each location's project, which is really just a settings.py file defining the installed portal applications, and a urls.py routing the urls to it. I have started to write some initial code, though, and I've come up against a problem. Some of the code that handles user authentication and profiles seems to be without a home. It doesn't conceptually belong in the portal application as it doesn't relate to the portal's functionality. It also, however, can't go in the project repository - as I would then be duplicating the code over each location's repository. If I then discovered a bug in this code, for example, I would have to manually replicate the fix over all of the location's project files. My idea for a fix is to make all the project repos a fork of a "master" location project, so that I can pull any changes from that master. I think this is messy though, and it means that I have one more repository to look after. I'm looking for a better way to achieve this project. Can anyone recommend a solution or a similar example I can take a look at? The problem seems to be that I am developing a Django project rather than just a Django application.

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• How to Put Javascript into an ASP.NET MVC View

  - by Maxim Z.

  I'm really new to ASP.NET MVC, and I'm trying to integrate some Javascript into a website I'm making as a test of this technology. My question is this: how can I insert Javascript code into a View? Let's say that I start out with the default ASP.NET MVC template. In terms of Views, this creates a Master page, a "Home" View, and an "About" view. The "Home" View, called Index.aspx, looks like this: <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %> <asp:Content ID="indexTitle" ContentPlaceHolderID="TitleContent" runat="server"> Home Page </asp:Content> <asp:Content ID="indexContent" ContentPlaceHolderID="MainContent" runat="server"> <h2><%= Html.Encode(ViewData["Message"]) %></h2> <p> To learn more about ASP.NET MVC visit <a href="http://asp.net/mvc" title="ASP.NET MVC Website">http://asp.net/mvc</a>. </p> <p>Welcome to this testing site!</p> </asp:Content> Adding a <script> tag here didn't work. Where and how should I do it? P.S.: I have a feeling I'm missing something very basic... Thanks in advance!

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• How can I add a link with a UID from a User Reference from a table in Drupal Views

  - by pduncan

  I have the following in Drupal 6: A Master CCK type which contains a User reference field and other fields. There will only be one record per user here. A View of this CCK, shown as a table, with one of the fields being the user ref from the CCK type. This field is initially shown as a user name, linking to the user profile. A Second CCK type which can have several pieces of data about a particular user. A View for this CCK type, displaying information as a table. It takes a user id as an argument (an integer) I want to click on the user name in the master view, and be directed to the detail view for this user. To do this, I tried selecting 'Output this field as a link' on the user field. The thing available for me to replace are: Fields * [field_my_user_ref_uid_1] == Content: User (field_my_user_ref) Arguments * %1 == User: Uid However, the [field_my_user_ref_uid_1] element is replaced by the user name, and %1 seems to get replaced with an empty string. How can I put the user id in here?

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• Autocomplete extender problems on user control

  - by RUtt

  I'm having trouble getting autocompleteextender (from ajaxcontroltoolkit) to fire when it is on a user control (it works fine when everything is on an aspx page. In my case I'm using a master page as well as a user control. Here's what I have. On the masterpage (path: masterpages/MasterPage.master) <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnablePageMethods="true"> </asp:ToolkitScriptManager> On the user control (path: controls/sitenavigation/usercontrol.ascx) <asp:TextBox id="txtSearchInput" Runat="server" CssClass="searchinput" Columns="95" MaxLength="95"></asp:TextBox> <asp:AutoCompleteExtender ID="txtSearchInput_AutoCompleteExtender" runat="server" DelimiterCharacters="" Enabled="True" ServiceMethod="GetSuggestions" ServicePath="~/App_Code/WebService.asmx" TargetControlID="txtSearchInput" UseContextKey="False" MinimumPrefixLength="2"> </asp:AutoCompleteExtender> On the Webservice (path: App_Code/WebService.cs) [System.Web.Script.Services.ScriptService] public class WebService : System.Web.Services.WebService { .... [WebMethod] public string[] GetSuggestions(string prefixText, int count, string contextKey) { //my code to return string[] } It seems that my problem is with my ServicePath in the extender but I just can't seem to figure out what it should be, any help would be great. Thanks.

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• git-p4 submit fails with "Not a valid object name HEAD~261"

  - by Harlan

  I've got a git repository that I'd like to mirror to a Perforce repository. I've downloaded the git-p4 script (the more recent version that doesn't give deprecation warnings), and have been working with that. I've figured out how to pull changes from Perforce, but I'm getting an error when I try to sync changes from the git repo back. Here's what I've done so far: git clone [email protected]:asdf/qwerty.git git-p4 sync //depot/path/to/querty git merge remotes/p4/master (there was a single README file...) So, I've copied the origin to a clean, new director, got a lovely looking merged tree of files, and git status shows I'm up-to-date. But: > git-p4 submit fatal: Not a valid object name HEAD~261 Command failed: git cat-file commit HEAD~261 This thread on the git mailing list seems to be relevant, but I can't figure out what they're doing with all the A, B, and Cs. Could someone please clarify what "Not a valid object name" means, and what I can do to fix the problem? All I want to do is to periodically snapshot the origin/master into Perforce; a full history is not required. Thanks.

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• jQuery - manipulate dropped element in sortable list

  - by WastedSpace

  Hi there, I have a draggable list (.field) where you can drag & drop items from it into a sortable list (.sortlist). I did it this way because I didn't want the master list (.field) altered in any way. It works fine, except I cannot work out how to manipulate the dropped field in a sortable list. I can do it from a draggable into a droppable area by using the following in a function for 'drop:' in droppable(): $(this).append('html code here to change content of dragged field'); However this doesn't work inside a sortable(). My code looks like this: $(".sortlist").sortable({ receive: function(event, ui) { var dropElemTxt = $(ui.item).text(); var dropElemId = $(ui.item).attr('id'); $(ui.item).replaceWith('<li class="box" id="'+dropElemId+'">Updated field! '+dropElemTxt+'</li>'); } }); $(ui.item).replaceWith changes the master field that was being dragged, so this doesn't work. And I tried $(this).replaceWith, but that updates the sortable area (.sortlist). Any idea what code I need to reference the dragged item? Many thanks, Ali.

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• Error with masterpage

  - by Raphyboy

  Hi, i'm creating a brand new masterpage with VS2010 Beta 2 and I get this warning (that causes me errors in the content pages): Validation (XHTML 1.0 Transitional): Content is not supported outside 'script' or 'asp:content' regions. The masterpage's code : <%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Bob.master.cs" Inherits="TShirtFactory.Web.All.Core.lib.masterpage.Bob" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <asp:ContentPlaceHolder ID="head" runat="server"> </asp:ContentPlaceHolder> </head> <body> <form id="form1" runat="server"> <div> <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server"> </asp:ContentPlaceHolder> </div> </form> </body> </html> As you can see, it's the default masterpage generated code. I get the warning when I hover the tag at top. Does anybody have an idea of what's going on ? Thank you

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• sp_addlinkserver using trigger

  - by Nanda

  I have the following trigger, which causes an error when it runs: CREATE TRIGGER ... ON ... FOR INSERT, UPDATE AS IF UPDATE(STATUS) BEGIN DECLARE @newPrice VARCHAR(50) DECLARE @FILENAME VARCHAR(50) DECLARE @server VARCHAR(50) DECLARE @provider VARCHAR(50) DECLARE @datasrc VARCHAR(50) DECLARE @location VARCHAR(50) DECLARE @provstr VARCHAR(50) DECLARE @catalog VARCHAR(50) DECLARE @DBNAME VARCHAR(50) SET @server=xx SET @provider=xx SET @datasrc=xx SET @provstr='DRIVER={SQL Server};SERVER=xxxxxxxx;UID=xx;PWD=xx;' SET @DBNAME='[xx]' SET @newPrice = (SELECT STATUS FROM Inserted) SET @FILENAME = (SELECT INPUT_XML_FILE_NAME FROM Inserted) IF @newPrice = 'FAIL' BEGIN EXEC master.dbo.sp_addlinkedserver @server, '', @provider, @datasrc, @provstr EXEC master.dbo.sp_addlinkedsrvlogin @server, 'true' INSERT INTO [@server].[@DBNAME].[dbo].[maildetails] ( 'to', 'cc', 'from', 'subject', 'body', 'status', 'Attachment', 'APPLICATION', 'ID', 'Timestamp', 'AttachmentName' ) VALUES ( 'P23741', '', '', 'XMLFAILED', @FILENAME, '4', '', '8', '', GETDATE(), '' ) EXEC sp_dropserver @server END END The error is: Msg 15002, Level 16, State 1, Procedure sp_MSaddserver_internal, Line 28 The procedure 'sys.sp_addlinkedserver' cannot be executed within a transaction. Msg 15002, Level 16, State 1, Procedure sp_addlinkedsrvlogin, Line 17 The procedure 'sys.sp_addlinkedsrvlogin' cannot be executed within a transaction. Msg 15002, Level 16, State 1, Procedure sp_dropserver, Line 12 The procedure 'sys.sp_dropserver' cannot be executed within a transaction. How can I prevent this error from occurring?

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• DATE lookup table (1990/01/01:2041/12/31)

  - by Frank Developer

  I use a DATE's master table for looking up dates and other values in order to control several events, intervals and calculations within my app. It has rows for every single day begining from 01/01/1990 to 12/31/2041. One example of how I use this lookup table is: A customer pawned an item on: JAN-31-2010 Customer returns on MAY-03-2010 to make an interest pymt to avoid forfeiting the item. If he pays 1 months interest, the employee enters a "1" and the app looks-up the pawn date (JAN-31-2010) in date master table and puts FEB-28-2010 in the applicable interest pymt date. FEB-28 is returned because FEB-31's dont exist! If 2010 were a leap-year, it would've returned FEB-29. If customer pays 2 months, MAR-31-2010 is returned. 3 months, APR-30... If customer pays more than 3 months or another period not covered by the date lookup table, employee manually enters the applicable date. Here's what the date lookup table looks like: { Copyright 1990:2010, Frank Computer, Inc. } { DBDATE=YMD4- (correctly sorted for faster lookup) } CREATE TABLE datemast ( dm_lookup DATE, {lookup col used for obtaining values below} dm_workday CHAR(2), {NULL=Normal Working Date,} {NW=National Holiday(Working Date),} {NN=National Holiday(Non-Working Date),} {NH=National Holiday(Half-Day Working Date),} {CN=Company Proclamated(Non-Working Date),} {CH=Company Proclamated(Half-Day Working Date)} {several other columns omitted} dm_description CHAR(30), {NULL, holiday description or any comments} dm_day_num SMALLINT, {number of elapsed days since begining of year} dm_days_left SMALLINT, (number of remaining days until end of year} dm_plus1_mth DATE, {plus 1 month from lookup date} dm_plus2_mth DATE, {plus 2 months from lookup date} dm_plus3_mth DATE, {plus 3 months from lookup date} dm_fy_begins DATE, {fiscal year begins on for lookup date} dm_fy_ends DATE, {fiscal year ends on for lookup date} dm_qtr_begins DATE, {quarter begins on for lookup date} dm_qtr_ends DATE, {quarter ends on for lookup date} dm_mth_begins DATE, {month begins on for lookup date} dm_mth_ends DATE, {month ends on for lookup date} dm_wk_begins DATE, {week begins on for lookup date} dm_wk_ends DATE, {week ends on for lookup date} {several other columns omitted} ) IN "S:\PAWNSHOP.DBS\DATEMAST"; Is there a better way of doing this or is it a cool method?

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