ORA-01034: ORACLE not available
ORA-27101: Shared memory realm does not exist

I  dunno why  I could not connect to Oracle Database Instance, cause yesterday night  it was working nicely,  I was trying to restart my Operating system and it didn’t make a change, so  I  looking for some help and found this solution:

The Solution was so simple, you just start the Oracle Instance Database Manually, because I was using Oracle 10 express , there was already menu on “start menu” Windows to start the Database Instance manually, and It was working again, thanks god

Ajax Architecture

Ajax Definition
Ajax (Asyncronous Java Script XML) was the extended version of Javascript with using XML as media to communicate with web server, this approaching make Ajax become lighter when being processed, in another word, Ajax only update the web page partially, so intercation between user and Web Server can running “asynchronously”.

Ajax Architecture

Ajax Framework consist of  couple of layers there are :

1. Javascript : The Programming language that generally already being supported by general browser to give interaction for user and processed on the client side,  Javascript basically from C , the original name of  Javascript was LiveScript from Netscape.
2. Document Object Model(DOM):  Depict the structure of web page and can be accessed by using Javascript.
3. Cascading Style Sheets (CSS): Take part as visual element of  Web page, CSS was being used by AJAX to modify the User Interface  
4. XMLHttpRequest : Was the client-script for make HTTP request, Ajax Application using XMLHttpRequest to make asynchronous communication between Client and Server ! 

ADO .NET Architecture

Description:
DataSource : DataSource was the initial name for Oracle Database, Microsoft SQL Server, XML file, etc.

Connection: Connection class can be set as “Open” or “Close”, with notes ”Open” was used for operation that directly access to Datasource.

DataReader: Data Reader was the best solution for “Forward Streaming“ , in another word, DataReader was the most appropriate to “SELECT”  Database Query Command, because it processed  faster  !

DataAdapter : DataAdapter has property “SELECT COMMAND“, “INSERT COMMAND“,”UPDATE COMMAND“, and “DELETE COMMAND“, these properties can be filled in by “Command” class and DataAdapter will definitely fill in DataSets With “fill()” method unless you did not specify the custome method.

DataSet : Equal to DataReader as temporary data storage, even though  Dataset Can be filled in by DataAdapter. DataSet uses XML to store dan send data between application and DataProvider, other than that DataSet was bunch of DataTable Object with it’s constraint and relation.

DataBound : ASP.NET component that support object binding will do “bound” to the data that’s stored on “DataSet”, “DataReader” and another object that store data collection.

1. Extension methods cannot be used to override existing methods
2. An extension method with the same name and signature as an instance method will not be called
3. The concept of extension methods cannot be applied to fields, properties or events
4. Use extension methods sparingly….overuse can be a bad thing!

I  give you the simplest example as illustration, consider we have Geometri class and it’s method GetCircle and Triangle, and we want to add additional method without make any change to this class, so add additional static class which contains the method that we want to inject into Geometri Class.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Extension_Method
{
class Geometri
{
public Geometri()
{

}

public double GetCircle(double r)
{
double a = 3.14 * (r * r);

return a;
}

public double Triangel(int a,int t)
{
double l = (0.5 * a) * t;

return l;
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Extension_Method
{
static class ExtensionClass
{
static ExtensionClass()
{

}

static public double square(this Geometri geo, int a)
{
return a * a;
}
}
}

Square method on ExtensionClass class have variable “geo” that point to “Geometri”, this means we
are going to attach this method on “Geometri” class. Furthermore

We should put “static” modifier to ExtensionClass, and finally make instance of “Geometri Class” and

you see the square method show up with description as “Extension Method”.

Extension method

This configuration have following notes

1. Your PHP5 installation are on the “c:\”
2. Your Apache server installation on “c:\Program Files\Apache Group\Apache2″.
3. Your Window Directory located on “C:\Windows”.
4. This installation Method using “Installing PHP as an Apache module” because this method was faster in performance.
5. This installation established on Windows platform, so if you on Unix especially Linux, just convert backslash “\” become “/”

So few changes may be should be taken when perform on different platform and installation directory

Configure Http.conf [Apache Web Server]

• Locate the installation folder of Apache Web server on typically like this “Apache Group/Apache2″ as default.
• Add “LoadModule php5_module c:/php”
• Because we are using Apache 2, we don’t need to add “php5_module”
• Locate the Addtype section and add on the first line “AddType application/x-httpd-php.php”.
• The rest configuration can be modified consider of your requirement.

Configure php.ini

This file was located on the PHP installation, there are two versions of PHP.INI file, “php.ini-dist” and “php.ini-recommended”, use “php.ini-recommended” then move it to your windows directory and rename it become “php.ini”, the default windows directory usually located on  “c:\Windows or c:\winnt”.

On the new and current php.ini, modify following lines with no double quote:

• Set “doc_root” to your “Apache Web Server documument root” => “doc_root = c:\Program Files\Apache Group\Apache2\htdocs”
• Set “extension_dir” to “user_dir =C:\php5\ext“
• because we want to use mysql as the Database Server then uncomment the “;extension=php_mysql.dll” become “extension=php_mysql.dll” by deleting the semicolon mark, so if you would choose another Database Server then uncomment the appropriate module on the list.
• copy and paste the library that you want to use to “C:\Windows\System32” as default.

- The default files that you should to copy were : “fdftk.dll”, “fribidi.dll”,”msql.dll”,”libeay32.dll”,”gds32.dll”,”libmhash.dll”,”libmysql.dll” and “ntwdblib.dll”

At this point we dunno  whether the configuration  was working right or not ! so
create php file on “C:\Program Files\Apache Group\Apache2\htdocs” (depend on your web server directory)  and name it “phpinfo.php” and put this script “<?php phpinfo() ?>”. If the configuration was working right the screen will show up, by typing this address on the URL “http://localhost:80/phpinfo.php” depend on your port number on the configuration file that your already being made !!.

Php Version

Nb: This Screen will Tell us all setting configuration that already being made and definitely Your running PHP Version !

Didalam OOP, semua class, termasuk class yang membangun java API, adalah subclasses dari superclass object. Contoh hirarki dari kelas dapat dilihat pada diagram dibawah ini.

Kelas yang berada diurutan atas, atau kelas yang mewariskan disebut sebagai “superclass”, sedangakan kelas yang berada urutan bawah atau kelas yang menerima pewarisan disebut sebagai “subclass” dari kelas class tersebut.

OOP Hierarchy

pewarisan adalah keuntungan besar dalam pemograman berbasis object karena suatu sifat atau method didefinisikan dalam superclass, sifat ini secara otomatis diwariskan ke semua subclasses, sehingga method ini bisa digunakan oleh subclass yang diwarisi oleh superclass,

Nb : Method = Procedure Atau Function

1.2 Mendifiniskan SuperClass dan SubClass

Untuk Memperoleh suatu class, kita menggunakan kata kunci extends untuk java dan : untuk C#. Dengan ilustrasi dibawah ini:




using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace Console_Test
{
class Vehicle
{
protected string Engine = "One Cilinder" ,VehicleName ="My Private Car",Type=VehicleType.SUV.GetHashCode().ToString();
protected bool FourWheelDrive = true;

public enum VehicleType
{

CityCar=0,SUV=1,Truck=2,SportCar=4
}

public Vehicle()
{
// System.Console.Out.Write(“This was Vehicle Constructor”);

}

public string GetName()
{
return this.VehicleName;
}

public void SetName(string UrVehicleName)
{
this.VehicleName = UrVehicleName;
}

public void SetEngineType(string UrEngineType)
{
this.Engine = UrEngineType;
}

public string GetEngineType()
{
return Engine;
}

public string GetType()
{
return Type;
}

public void SetType(string Type_)
{
Type = Type_;
}

public bool GetForWheelDrive()
{
return this.FourWheelDrive;
}

public void SetForWheelDrive(bool WD)
{
this.FourWheelDrive = WD;
}

}
}

Selanjutnya kita buat kelas turunan dari Vehicle dengan nama kelasnya “AudiTT“

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Console_Test
{
class AudiTTCar : Vehicle
{

public AudiTTCar()
{
this.SetName(“AudiTT”);
this.SetForWheelDrive(true);
this.SetEngineType(“4 Cilinder”);
this.SetType(Vehicle.VehicleType.SUV.GetHashCode().ToString());
}

}
}

Pada “Main method”-nya

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Console_Test
{
class Program
{
static void Main(string[] args)
{
System.Console.Out.WriteLine(“Nama Kendaraan Ini Adalah :{0}”,new Vehicle().GetName());

System.Console.Out.WriteLine(“Jenis Mesin :{0}”, new Vehicle().GetForWheelDrive() ? “4WD” : “Bukan 4WD”);

System.Console.Out.WriteLine(“Silinder Mesin :{0}”, new Vehicle().GetEngineType());

System.Console.Out.WriteLine(“Jenis Mobil :{0}”, Enum.GetName(typeof(Vehicle.VehicleType),int.Parse(new Vehicle().GetType())));

System.Console.Out.WriteLine(“=======================================================”);

System.Console.Out.WriteLine(“Nama Kendaraan Ini Adalah :{0}”, new AudiTTCar().GetName());

System.Console.Out.WriteLine(“Jenis Mesin :{0}”, new AudiTTCar().GetForWheelDrive() ? “4WD” : “Bukan 4WD”);

System.Console.Out.WriteLine(“Silinder Mesin :{0}”, new AudiTTCar().GetEngineType());

System.Console.Out.WriteLine(“Jenis Mobil :{0}”, Enum.GetName(typeof(AudiTTCar.VehicleType), int.Parse(new AudiTTCar().GetType())));

System.Console.ReadKey();
}
}
}

StateMachine Workflow

Microsoft Workflow Foundation or WWF was the technology that allows the states of the flow to be saved on the Database, and load it when ever you want, this kind of workflow was called “State Machine Workflow”!

sequential Workflow

mean while “Sequential Workflow” was the workflow that flow state cannot be be saved, because the flow must meets the end point.

Open Command prompt / Cmd then type “exp grips_front/grips123 @dyware-valkiry/xe  file=”test.dmp” ”

The Pattern was “exp [username]/[passpowrd] @[your host name]/[your database instance] file=”[ the dmp file that store database backup ]” .

The Details were:

1. exp was the command to export the scheme of database.
2. grips_front was the user name/owner  of the current database  scheme that already have administrator privilege.
3. grips123 was the password of the current user name.
4. file=”test2.dmp” was the target file that will store all data and scheme of the database that belong to the current user.
5. @dyware-valkiry/xe, @dyware-valkiry was your computer name and xe was the name of the database instance.

Export Oracle Database scheme

RESTORE

Like to backup the Database, the command was almost same

Open Command prompt / Cmd then type “imp grips_front/grips123  file=”test.dmp” @dyware-valkiry/xe “

The single different of this Restore command was just only it’s command, by calling “imp” file.

sometimes if we would to update current of the  database scheme, we should to delete the current user of the current database owner, this is automatically delete the scheme that belong to the that user.

The hierarchy steps were like this:

1. Log in as system to the database  “sqlplus system/hikari @xe” the pattern was like this  “sqlplus [database administrator]/[password of administrator] @[your database instance]“.
2. Call the delete user command “drop user grips_front cascade“, you should call  cascade after user name, unless the system will request for it.
3. Create the same user by “create user grips_front identified  by grips123“, by doing this, we were still lack privilege of importing database scheme, so type this command “grant dba to grips_front” after we have created that user, then Exit from sqlplus by type “Ctrl+c” or “Exit” on Command Prompt,  then type “imp grips_front/grips123 file=”grips.dmp”  full=y, the pattern was equal to export command.

Importing Oracle Database Scheme