1. What is your name: May
2. A four Letter Word: Moon
3. A boy’s Name: Michael
4. A girl’s Name: Marilyn
5. An occupation: Manager
6. A color: Magenta
7. Something you’ll wear : Marc Jacobs + Maybelline
8. A food: Mutton + Mashed Potatoes (Moon Cake + M&Ms for dessert)
9. Something found in the bathroom: Mat + Medicine cabinet
10. A place: Melbourne
11. A reason for being late: Malaria or Mad cow disease
12. Something you’d shout: Mwahahaha!
13. A movie title: Me, Myself & Irene
14. Something you drink: Mocha
15. A musical group: Muse
16. An animal: Mongoose
17. A street name: Maunicau Rd (ok not exactly a street)
18. A type of car: Mini Cooper (Mr. Bean’s car) or Mini Bus
19. The title of a song: My Life Would Suck Without You, My Heart Will Go On
20. A verb: Motivate

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1. SDLC – Software Development Lifecycle … what’s the point? (part 1 of many)
2. SDLC – Software Development Lifecycle … closer look at basics (part 2 of many)
3. SDLC – Software Development Lifecycle … exploring common models (part 3 of many)
4. SDLC – Software Development Lifecycle … agility strikes back with energy (part 4 of many)
5. SDLC – Software Development Lifecycle … is prototyping  part of the good, the bad and/or the evil? (part 5 of many)
6. SDLC – Software Development Lifecycle … analyzing the battle ahead (part 6 of many)
7. SDLC – Software Development Lifecycle … designing the blueprint (part 7 of many)
8. SDLC – Software Development Lifecycle … testing, the moment of truth (part 8 of many)
9. SDLC – Software Development Lifecycle … flashback, component-level design principles (part 9 of many)
10. SDLC – Software Development Lifecycle … Visual Process & Estimating (Guessing) Software Deliverables
11. To scrum or to Run … that is the agile question? (new)
12. —
    

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What is Lucene.Net?

[ # ] Lucene.Net is a source code, class-per-class, API-per-API and algorithmatic port of the Java Lucene search engine to the C# and .NET platform utilizing Microsoft .NET Framework.

Lucene.Net sticks to the APIs and classes used in the original Java implementation of Lucene. The API names as well as class names are preserved with the intention of giving Lucene.Net the look and feel of the C# language and the .NET Framework. For example, the method Hits.length() in the Java implementation now reads Hits.Length() in the C# port.

In addition to the APIs and classes port to C#, the algorithm of Java Lucene is ported to C# Lucene. This means an index created with Java Lucene is back-and-forth compatible with the C# Lucene; both at reading, writing and updating. In fact a Lucene index can be concurrently searched and updated using Java Lucene and C# Lucene processes.

What happens to Lucene.NET library?

This has no effect on Lucene.NET project incubated at Apache (http://incubator.apache.org/lucene.net/) as dotlucene.net was an independent site promoting DotLucene/Lucene.NET.

Where do I find more about Lucene.NET?

• Official website: http://incubator.apache.org/lucene.net/
• Downloads: http://incubator.apache.org/lucene.net/download/
• API documentation: http://incubator.apache.org/lucene.net/docs/ (1.4.3, 1.9.1, 2.0, 2.1)
• Apache Lucene – Java code: http://lucene.apache.org/java/docs/
• Cross-Platform Implementations: http://wiki.apache.org/lucene-java/LuceneImplementation
• Sites that use Lucene/Powered By: http://wiki.apache.org/lucene-java/PoweredBy

Is dotlucene.net content available?

The devoted dotlucene.net fans can download www.dotlucene.net content as a zip archive: www.dotlucene.net.zip (476 kB). DotLucene API Search demo 1.1 (2.38 MB)

Lucene.Net Architecture [ # ]

The lower layer is the data access layer (Storage). Then, the upper layer is about accessing the index files (data access). This layer is used by the indexing system and the searching system. On top of those we find a layer for searching and a search request parser layer used by the searching part of Lucene.Net. Identically we found a parser layer and a document layer used for the indexation part of Lucene.Net.

[ # ] At the heart of the engine is the index (similar to a database table) with fields (like database columns) that contains documents (like database rows). To search one must write a query and give it to the engine to finding matching documents. The query language for a database is SQL and for Lucene it’s a query object (you can construct complex queries by composing an object graph of query instances).

Search engines are super fast for finding text because documents are stored in an inverted index (where the terms of each field is tokenized, hashed and sorted at index time).

In contrast to database queries, search engines can calculate relevance scores when searching. This is because they use a better querying model called the vector space model instead of the classical boolean model. In the vector model, documents and queries are represented as vectors. The similarity between a query and any document can be calculated with simple vector operations. Documents with a higher similarity will appear higher in the results. Conversely, databases only know if rows meets the where criteria or not and cannot compute a relevance score – this true/false classification is how the boolean model got it’s name.

Resources/Reference links

• Introducing Lucene.Net
• Lucene, an introduction
• DotLucene: Full-Text Search for Your Intranet or Website using 37 Lines of Code
• Working with Lucene.Net
• Lucene.Net – Text Analysis
• Indexing and searching business entities using Lucene.Net Framework, part 1
• Indexing and searching business entities using Lucene.Net Framework, part 2
• Indexing and searching business entities using Lucene.Net Framework, part 3
• C# and Lucene to index and search (used VS 2005 and C#)
• Indexing Database Content with dotLucene
• Indexing and Searching Image files (Using Lucene.NET along with open-source libraries)
• Full Text Search with Hibernate Search
• Luke – Lucene Index Toolbox
• LuSql is a simple but powerful tool for building Lucene indexes from relational databases. It is a command-line Java application for the construction of a Lucene index from an arbitrary SQL query of a JDBC-accessible SQL database.
• Tutorial: implementing lucene.NET search
• cs2project
• Lucene in Action book, First and Second Edition
• Lucene Intro and QueryParser Rules by Erik Hatcher (Java version)
• Introducing Lucene.Net: A plunge intro creating a fast, full text index, with advanced searching capabilities.
• LINQ to Lucene: Providing a custom LINQ solution for the Lucene Information Retrieval System, commonly referred to as a search-engine.
  • LINQ & Lambda, Part 4: Lucene.Net.
• NHibernate.Search using Lucene.NET Full Text Index by Simon Green
  • Part 1: How to use Lucene.NET with NHibernate to provide full-text searching.
  • Part 2: Performing Google-like searches of NHibernate-persisted objects using Lucene.NET search engine.
  • Part 3: Using Lucene.NET to find similar items for ‘posts like this’ or ‘related pages’.
• C# and Lucene to index and search: This sample will show you how to use Lucene from your .NET application to index and search content.
• Fun with Lucene.Net for BlogEngine.Net by Jared

Lucene.Net Cross-Platform Implementations: LuceneImplementations

Lucene implementations in languages other than Java:

• CLucene – Lucene implementation in C++
• Lucene.Net – Lucene implementation in .NET
• Lucene4c – Lucene implementation in C
• LuceneKit – Lucene implementation in Objective-C (Cocoa/GNUstep support)
• Lupy – Lucene implementation in Python (RETIRED)
• NLucene – another Lucene implementation in .NET (out of date)
• Zend Search – Lucene implementation in the Zend Framework for PHP 5
• Plucene – Lucene implementation in Perl
• KinoSearch – a new Lucene implementation in Perl
• PyLucene – GCJ-compiled version of Java Lucene integrated with Python
• MUTIS – Lucene implementation in Delphi
• Ferret – Lucene implementation in Ruby

Other Search/Indexing Services

• Searcharoo 4: C# search engine: refactored to search Word, PDF and more
• Searcharoo.Net: http://www.searcharoo.net/
• CastleProject
• C# Parser

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Error:
The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2869.

So I dig around the forum and found this solution from Otis.

• Create a new .bat file in the same folder as the one the LLBLGenPro20.msi file is in.
• Add the following text ‘msiexec /i LLBLGenPro20.msi’ and save the file.
• Right click the .bat file and select ‘Run as Administrator’.

I tried doing as mentioned in the steps but I got the following message and couldn’t able to install it.

So I changed the Otis’s command to ‘msiexec /a LLBLGenPro20.msi‘ and run it directly from command line instead of right-click – run as administrator on the .bat file and it works!

If it still doesn’t work for you after following the above steps, I guess you better do these, disable UAC and enable XP compatibility mode as mentioned here.

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The worst thing about this installation is that, it takes ages to install till the end, then shows up the error message box.

Program Versions:

# SQL Server 2005 – Developer Edition
# Windows Vista Ultimate
# Visual Studio Team Suite 2008

Make sure you cross check Hardware and Software Requirements for Installing SQL Server 2005 before installation.

The first error/warning I tried to fixed was about IIS requirement. I’m sure I have IIS7 enabled on my Vista and also enabled IIS6 compatiblity mode but that is not enough and have to enable some more features.

System Configuration Check: IIS Feature Requirement
Microsoft Internet Information Services (IIS) is either not installed or is disabled. IIS is required by some SQL Server features. Without IIS, some SQL Server features will not be available for installation. To install all SQL Server features, install IIS from Add or Remove programs in Control Panel or enable the IIS server through the Control Panel if it is already installed, and then run SQL Server Setup again. For a list of features that depend on IIS, see Features Supported by Editions of SQL Server in Books Online.

I think it is to do with Installing SQL Server 2005 Reporting Service on Vista, untill or unless you enable all those features the Reporting services cannot be installed.

Solution:
The main features to turn on are as mentioned here but I turned on almost everything just to make sure.

More info links:
# How to install SQL Server 2005 Reporting Services on a Windows Vista-based computer
# Installation of SQL Server 2005 in Windows Vista – warning message on IIS feature requirement during System Configuration Check
# Tip for Installing SQL Server 2005 Reporting Service on Vista

Ok, this one is the weirdest error and solution I got. Don’t even ask why in the world do I need to install Office 2003 Web Component add-in while I have Office 2007 installed on my machine. I have no clue, but that’s the only solution I found which works for me. It solves the “OWC11 Setup failed error and the following error message.

ERROR 1706 Setup cannot find the required files. Check your connection to the network, or CD ROM! For other potential solutions to this problem, see c:\Program Files\Microsoft Office\Office11\1033\Setup.chm

Solution
You have to download and install “Office 2003 web components” first and install SQL Server 2005 again; which then in my case cleared the error and installed successfully.
# Download: Office 2003 Add-in: Office Web Components – owc11.exe [ 17.6MB ]

After everything is done, remember to install Microsoft SQL Server 2005 Service Pack 2. Pheewww! That’s it!

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Program Version:

# Infragistics NetAdvantage 2005 Volume2 + hotfixes
# Windows Vista Ultimate

Problem:

The installer runs almost to the end then throws up some compatibility issues errors and didn’t get install properly. The dll library files get loaded in the GAC but cannot load the form design views and also there is no infragistics folder in C:\inetpub\wwwroot\aspnet_client.

Solution:
Need to follow these 4 steps properly.

1. Disable User Account Control (UAC)
2. Restart your machine
3. Edit the System Registry for Internet Information Services (IIS)
4. Enable IIS 6.0 Compatibility

Reference Links:

# FAQ:Installing NetAdvantage for .NET on Windows Vista
# Tip/Trick: Using IIS7 on Vista with VS 2005

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Information schema views provide an internal, system table-independent view of the SQL Server metadata. Information schema views enable applications to work correctly although significant changes have been made to the underlying system tables. (#)

Select a List of all Tables in a Database

SELECT *
FROM [DB-Name].information_schema.tables
WHERE table_type = 'Base Table'

Note:

• The columns returns are ‘Table_Catalog’, ‘Table_Schema’, ‘Table_Name’ and ‘Table_Type’
• The result includes dtproperties table in the list as well. To remove it add another condition in the WHERE statement.
  eg. WHERE table_type = ‘Base Table’ AND table_name != ‘dtproperties’
• Use square brackets [] if the DB name includes a dash ‘-’.

Select a list of all Tables and Columns in a Database

SELECT *
FROM FIBS.information_schema.columns

23 columns resulted by the above query. To refine more, try the query below.

SELECT table_name, column_name, data_type, character_maximum_length, is_nullable
FROM Information_Schema.columns
WHERE table_name IN (Select name
		                  FROM sysobjects
		                  WHERE xtype = 'U')
ORDER BY table_name

Note:

• xtype has two values – ‘U’ or ‘S’
• U = User generated tables
• S = System generated tables

More info: SQL Server 2005 System Tables and Views
This page includes a good list of all the How-To that you might want to check out: Querying the SQL Server System Catalog FAQ

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Lock-modify-unlock

In this model, the repository allows only one person to change a file at a time. This exclusively policy is managed using locks. VSS and old style source controls use this approach where only one person at a time can modify a file. Lock the file, edit, then check in and release the lock. This model is only suitable for a small teams. For a bigger team with many developers, it would be inefficient to use this model as locking isolates a file to only one developer which delays the work among other team members who want to work on the file.

The lock-modify-unlock model (Ref #)

The problem with the lock-modify-unlock model is that it’s a bit restrictive, and often becomes a roadblock for users:

• Locking may cause administrative problems.
  if one developer forgot to unlock a file before he take a leave would cause others to delay working on the file unless an administrator to release the lock.
• Locking may cause unnecessary serialization
  if developers are to edit different part of the file, it’s is unnecessary to unlock and edit. It should be edited together then merge the file.
• Locking may create a false sense of security

(Ref: pp. 4)

Copy-modify-merge

In this model, each user’s client contacts the project repository and creates a personal working copy – a local reflection of the repository’s files and directories. Users then work simultaneously and independently, modifying their private copies. Subversion, CVS and a number of other version control systems uses this model as an alternative to locking. Early version of Subversion did not support locking at all, but this is no longer the case. You can now lock files, query files to see who has locked then, and even mark files as requiring locks before edits. This make sense for binary files where merging is impossible. (Ref: pp 5)

Copy-Modify-Merge model (Ref #)

NB: TortoiseSVN provides a good built-in diff tool; you can also install WinMerge (http://winmerge.org), which integrate itself into TortoiseSVN.

When Locking is Necessary

While the lock-modify-unlock model is considered generally harmful to collaboration, there are still times when locking is appropriate.

The copy-modify-merge model is based on assumption that files are contextually mergeable: ie. that the majority of the files in the repository are line-based text files(such as program source code). But for files with bonary formats, such as artwork or sound, it’s ofter impossible to merge conflicting changes. In these situations, it really is necessary to users to take strict turns when changing the file. Without serialized access, somebody ends up wasting time on changes that are ultimately discarded.

While Subversion is still primarily a copy-modify-merge system, it still recognizes the need to lock an occasional file and provide mechanisms for this. (Ref: pp 7)

Ref:
#Don’t Use Microsoft Visual SourceSafe!,
# subversion documentation | Online version

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Documentations:

• Subversion Software (Wiki): Subversion features and support wiki
• SVN Documentation: documentation on latest svn, available in pdf and html downloads
• TortoiseSVN Tutorials: step by step tutorial on using TortoiseSVN
• AnkhSVN Wiki Home: svn Visual Studio plugin – AnkhSVN support wiki.

Good Reference Articles

• Branching & Merging Primer: very good explanations on various form of branching and merging.
• Source Control HOWTO: Series of articles explaining how to do source control and the best practices.
• Subversion Resources at Open Directory: various resources and plugins for svn on multiple platforms.
• Subversion versus Perforce: Popular source code management tools go head to head: good comparison on svn vs perforce by the register
• My Experiences With Subversion: good article on personal experience with svn.
• Steps in starting up with Subversion – moving away from Sourcesafe

No to Visual SourceSafe? Bad Toad! Bad Toad!

• Don’t Use Microsoft Visual SourceSafe!
• Source Control: Anything But SourceSafe: strong emphasis on not to use VSS.
• Visual SourceSafe: Microsoft’s Source Destruction System: points out the disadvantages of VSS in terms of features as well as code safety.
• Visual SourceSafe Version Control: Unsafe at any Speed?

I’ll be adding more later and if you find some good readings/articles, do let me know too.

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Now I found a new pet. It’s really a sweet and gentle thing to start with. It says “Hello” and wags a little tail. Oh just so cute!

Before you start with the tortoise, you have to know its family tree; the big fat “Turtles” – Subversion (SVN) evolved from their ancestors called CVS back in ice-age. I’m not interested in CVS but I’m very much interested in SVN and how the little TortoiseSVN communicates to its parents.

So I did a bit of research on Googology and started learning about the whole Tortoise family and their neighborhood. So here we go…

What is SVN?

Subversion is an open source application for revision control, is a replacement for CVS. The goal of the subversion project is to build a version control system that is a compelling replacement for CVS in the open source community.

Subversion’s Features (# Parent Site) (# Wiki)

What operating systems does Subversion run on? (# Portability)

All modern flavors of Unix, Win32, BeOS, OS/2, MacOS X.

Subversion is written in ANSI C and uses APR, the Apache Portable Runtime library, as a portability layer. The Subversion client will run anywhere APR runs, which is most places. The Subversion server (i.e., the repository side) is the same, except that it will not host a Berkeley DB repository on Win9x platforms (Win95/Win98/WinME), because Berkeley DB has shared-memory segment problems on Win9x. FSFS repositories (introduced in version 1.1) do not have this restriction; however, due to a limitation in Win9x’s file-locking support, they also don’t work in Win9x.

To reiterate, the Subversion client can be run on any platform where APR runs. The Subversion server can also be run on any platform where APR runs, but cannot host a repository on Win95/Win98/WinMe.

It’s not necessary to set up Apache to use Subversion on the client sides.If you just want to access a repository then can use subversion client such as TortoiseSVN to integrate with the server. Only when you want to host a networked repository then you have to set up on Apache2 or an “svnserver” server. More info see FAQs (#)

What is TortoiseSVN?

It’s a free open-source client for the Subversion version control system, implemented as Windows shell extension. TortoiseSVN manages files and directories over time. Files are stored in a central repository. Its immediate ancestor was TortoiseCVS which talks to CVS server. (# Doc)

TortoiseSVN’s Features (# Doc)

• Shell integration
• Icon overlays
• Easy access to Subversion commands
• Directory versioning
• Atomic commits
• Versioned metadata
• Choice of network layers
• Consistent data handling
• Efficient branching and tagging
• Hackability

You can also integrade with Visual Studio.net using this tool called AnkhSVN. It is a Visual Studio .NET addin for the Subversion version control system. It allows you to perform the most common version control operations directly from inside the VS.NET IDE. Not all the functionality provided by SVN is (yet) supported, but the majority of operations that support the daily workflow are implemented. (#)

I think this is all for today’s learning about my new pet. I’ll add more detail on how to feed things and teach your pet A,B,C,D later.

So you want to adopt a Tortoise too? Here are where you can get it from and how to look after it.

# Get Subversion here
# Get TortoiseSVN here.
# Download AnkhSVN

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# References:

# Debate: O/R Mapping or Code Generation : Lots of discussion going on there in the reply threads.
# Your Favorite O/R Mapper? : A discussion on O/R Mappers
# CodeSmith Rocks! | When code generation goes bad…
# LLBLGenPro vs CodeSmith w/ .netTiers

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O/R Mapper (Object-Relational Mappers) is a programming technique for converting data between incompatible type systems in databases and Object Oriented Programming languages. (# Ref)

What does it do?

The generated code from the O/R Mapper handles all of the steps that you would normally have to code yourself, saving you from having to:

• Find the database server.
• Log in and open a connection to the database server.
• Select the particular database containing the information you want.
• Find the correct table.
• Find the correct row.
• Read all the values for that row.
• Convert every type of value from its SQL data type into the .NET data type while checking and handling the possibility of a null value.
• Present those values in a strongly-typed format, so the consumer knows exactly what kind of object to expect (string, integer, array, etc.) and there are no surprises at run-time.
• Create a container to temporarily hold the values while they are being modified.
• Retrieve data from another row in a related table.
• Manage which values have changed and make appropriate INSERT’s, UPDATE’s, and DELETE’s in the appropriate tables in the database to reflect those changes.
• Close the connection.

What is LLBLGen Pro

LLBLGen Pro is a complete O/R mapper and data-access tier generator for .NET. It generates a data-access tier and business façade/support tier (in C# or VB.NET), using an existing database schema set. The generated .NET code is provided as a Visual Studio.NET project that can be added to a solution or compiled separately. (# Ref + More Info)

LLBLGen Pro Features

A key feature in LLBLGen Pro is dynamically-generated SQL. When retrieving or manipulating data in a database, the SQL script — the code understood by the database — is generated at run-time based off the requested information and dirty flags in each entity’s fields. This enables a generic save entity function on the Data Access Tier to produce different and optimized SQL code each time it is called, optimizing bandwidth usage and database load. (# Ref)

• LLBLGen Pro will completely auto-generate the data access layer. You do not need to do any hand-coding in this layer
• LLBLGen Pro will optionally generate a business logic layer shell for you to get started with your business layer. You do not have to understand the intricacies of inheritance and making custom classes to take advantage of business logic classes; in LLBLGen Pro these classes are intuitively organized, powerful, and infinitely extendable.
• LLBLGen Pro collections and entity objects are bindable, making them extremely easy to add to .NET controls. This can reduce the size of your UI layer.
• Changing the database application and the data access layer without affecting the business logiv and UI layers is actually possible with LLBLGen Pro. If you migrated your database schema and stored procedures to a new database application, refraned from using any database-specific features and your schema matched exactly, you could actually re-generate your LLBLGen Pro data access layer and not make any other changes to your application.

# Ref: Rapic CSharp Windows Development. pp. 17

LLBLGen Pro Objects

• Entities: Every “Row” becomes an “Entity”
• Collections: Every “Table” becomes an “EntityCollection”. Collection classes eliminate the need for DataTable objects and are both strongly typed and bindable.
• Entity relationships: Build into each entity are all relationships in the DB involving that table. You can either get a single entity or an entity collection depending on the type of relationship.
• Typed views: Views in the DB can be wrapped as strongly-typed DataTable. Typed views are read-only; new LLBLGen Pro allows you to add a view from the database as an entity as well as a typed view.
• Typed Lists: Typed lists are the only objects created by LLBLGen Pro that do not correspond one-to-one with DB objects. It’s handy when you need very specific information that does not necessarily correspond to a single table or entity or you only want to grab a subset of information for a given set of table.
• Storedprocedures caller classes: Storedproc that you select will be wrapped in a layer of code. While the parameters of the stored procedures are strongly-typed, the result set is still an untyped DataSet.

Project Types: SelfServicing Vs. Adapter

There are two types of LLBLGen Pro Projects namely – SelfServicing and Adapter.
# In SelfServicing template group, entity objects are responsible for their own persistence (saving their own changes to DB).
# The entity class itself contains logic to know which fields were updated and where to find the database.
# Lazy Loading is useful cos’ it abstracts the specific DB call from the upper layers of code.
# Adapter template group: uses an object called a DataAccessAdapter to interact with DB
# SelfServicing: bundles persistence inside entity objects
# Allows data to load itself automoatically as it is needed without explicit commands.

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N-Tier Application Design

• DataAccess Layer (DA): contains all code necessary to execute SELECT, INSERT, UPDATE and DELETE statements in the database, access views, datatypes of your programming languages.
• Business Logic Layer (BL): contains code that implements the rules of your business.
• UserInterface Layer (UI): contains code that puts data into specific control in order to display it for your users.

The advantages of 3-tier design

• Able to change your application to completely different user interface without losing the other two layers of your code.
• Business rules are saved in central location. If you decide to change the process for validation an Order, you only have to change it in one place.
• If you change your DB, you only need to change DA layer.

I’ll fill up more later.

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I’ll be updating this post with links so still tune.

• Windows SDK Setup
• Installing .NET 3.0 and Orcas
• Microsoft® Visual Studio® 2005 Service Pack 1
• Basic N-Tier Recap
• Introducing O/R Mapper and LLBLGen Pro
• LLBLGen vs CodeSmith
• Dear DotLucene
• Greetings Subversion and TortoiseSVN
• Source Control Resources
• Versioning Models
• More coming soon…

All the notes are subject to change as I’ll be filling in with more info later.

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