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Oracle
Saturday, December 8, 2012PrintSubscribe
HR Sample App (Oracle)

Sample database HR (Human Resources) comes standard with Oracle database server. Let’s create a web application straight from this database.

Getting Oracle on Your Computer

First, download the Oracle Database Express Edition 11g Release 2 installation files.

When the download is complete, extract the zip folder. Run the file at DISK1\setup.exe. Follow the steps to install Oracle Express Edition 11g on your computer.

When the database server has been installed, log in to the management website. The link to the page is available at C:\oraclexe\app\oracle\product\11.2.0\server\Get_Started.url. In the web browser, click on the Application Express tab, and create a workspace in order to access the database.

Native vs. Managed Data Provider

Code On Time web application generator creates web apps based on Microsoft ASP.NET, a component of Microsoft.NET technology. Database vendors offer middleware that allows ASP.NET applications to communicate with their servers. Oracle offers two providers:

The ODP.NET (Oracle Data Provider) is included in the Oracle Data Access Components (ODAC) for Windows package. The provider is a managed .NET wrapper that “speaks” to unmanaged native API of Oracle database server.

Because of this mix of managed and unmanaged code, there is a need to install both 32-bit and 64-bit versions of ODP.NET when working with Windows 7 and 8. Some components of development tools for Windows support only 32-bit architecture. Each version of ODP is around 230 MB in size.

The ODP.NET, Managed Driver is less than 2 MB in size and written purely in .NET. It has better performance and is easier to configure. This is the recommended .NET provider for ASP.NET web applications.

Click on one of the links above and install one of the providers for Oracle.

Creating a Web Application

Start the code generator, and click on the Create a new web application link on the start page. Select Web Site Factory to create the project.

Creating a 'Web Site Factory' project on the New Project screen.

Assign the project a name of “HR”, select the programming language of your choice (C# or Visual Basic), and press Create.

Assigning a name of 'HR' to the project.

Leave the default Namespace and Framework values and press Next.

Select the desired ODP provider in the Data Provider dropdown, and click on the “…” button next to Connection String field to access the Oracle Connection screen.

Selecting the 'Oracle Data Provider for .NET, Managed Driver' for the Data provider dropdown on the Database Connection screen.

'Oracle Data Provider for .NET' data provider selected. The '...' button next to Connection String field will activate the 'Oracle Connection' screen.

Enter your Server name, User name, and Password in the appropriate fields.

If you are working with Oracle Express Edition and using ODP.NET Managed Driver, leave the Server name blank. If you are using ODP.NET , then enter “127.0.0.1” in the Server name.

Press the Test button to test the connection string.

Alert showing that test connection succeeded for the Oracle connection string.

Press OK to dismiss the Connection Status window, and press OK to insert the configured connection string into the field.

Press Next twice to reach the Reporting page. Check the box to enable reporting.

Enabling reporting for the web application.

Press Next to reach the Themes page. Select Social from the list box.

Selecting a theme for the web application.

Hold down Shift, and press Next to skip to the Summary screen.

Activating the 'Generate' button on the Summary screen.

Press Generate to start the code generation. A window will open in your default web browser with the web app when complete.

Generated web application loaded in the default web browser.

Learn how to configure Custom Membership and Role Provider for your Oracle database.

Tuesday, December 4, 2012PrintSubscribe
Advanced Membership Provider for Oracle Server

Requirements

An advanced membership and role provider requires three tables.

One table keeps track of user information. This information includes the user_name, email, and comments. Additional columns allow for implementation of a password question and answer in order to recover a forgotten password. When users are created, they can not be approved by default. Additional information is captured about the most recent login, activity, and change of password. When a user inputs an incorrect password past the limit, the user will become locked out. The number of failed attempts and most recent failed attempt will be stored.

Two tables are required to keep track of roles and associations of users with roles.

"Users", "Roles", and "User_Roles" table diagram for Advanced Membership Provider in Oracle.

These are the advanced membership and role provider tables with “identity” primary keys.

SQL:

create sequence users_seq;

create table 
users
(
    user_id 
int not null primary key,
    user_name varchar2(128) not null,
    password varchar2(128) not null,
    email varchar2(128),
    comments nclob,
    password_question varchar2(256),
    password_answer varchar2(128),
    is_approved number(1,0) check (is_approved in (1,0)) not null,
    last_activity_date date not null,
    last_login_date date not null,
    last_password_changed_date date not null,
    creation_date date not null,
    is_locked_out number(1,0) check(is_locked_out in (1,0)) not null,
    last_locked_out_date date not null,
    pwd_attempt_count int not null,
    pwd_attempt_window_start date not null,
    pwd_ans_attempt_count int not null,
    pwd_ans_attempt_window_start date not null
);

create or replace trigger 
users_trigger
    before 
insert
    on 
users
   
for each 
row
declare

    u_id users.user_id%type;
begin
    select users_id_seq.nextval into u_id from dual;
    :new.user_id := u_id;
end users_trigger;
/

create 
sequence roles_seq;

create table 
roles
(
    role_id 
int not null primary key,
    role_name varchar2(50
)
)
;

create or replace trigger 
roles_trigger
    before 
insert
    on 
roles
   
for each 
row
declare

    r_id roles.role_id%type;
begin
    select roles_seq.nextval into r_id from dual;
    :new.role_id := r_id;
end roles_trigger;
/

create table 
user_roles
(
    user_id 
int not null,
    role_id int not null,
    constraint pk_user_roles primary key(user_id, role_id),
    constraint fk_users foreign key(user_id) references users(user_id),
    constraint fk_roles foreign key(role_id) references 
roles(role_id)
)
;

These are the advanced membership and role provider tables with “unique identifier” primary keys.

SQL:

create table users
(
    user_id 
raw(16) default sys_guid() not null primary key,
    user_name varchar2(128) not null,
    password varchar2(128) not null,
    email varchar2(128),
    comments nclob,
    password_question varchar2(256),
    password_answer varchar2(128),
    is_approved number(1,0) default 1 check (is_approved in (1,0)) not null,
    last_activity_date timestamp not null,
    last_login_date timestamp not null,
    last_password_changed_date timestamp not null,
    creation_date timestamp not null,
    is_locked_out number(1,0) default 1 check(is_locked_out in (1,0)) not null,
    last_locked_out_date timestamp not null,
    pwd_attempt_count int not null,
    pwd_attempt_window_start timestamp not null,
    pwd_ans_attempt_count int not null,
    pwd_ans_attempt_window_start timestamp not null
);

create table 
roles
(
    role_id 
raw(16) default sys_guid() not null primary key,
    role_name varchar2(50
)
)
;

create table 
user_roles
(
    user_id 
raw(16) not null,
    role_id raw(16) not null,
    constraint pk_user_roles primary key(user_id, role_id),
    constraint fk_users foreign key(user_id) references users(user_id),
    constraint fk_roles foreign key(role_id) references 
roles(role_id)
)
;

Configuration

Use one of the scripts above to create the membership and role provider tables in your database.

Start Code On Time web application generator, select the project name on the start page, and choose Settings. Select Authentication and Membership.

Select “Enable custom membership and role providers” option and enter the following configuration settings.

table Users = users
column [int|uiid] UserID = user_id
column [text] UserName = user_name
column [text] Password = password
column [text] Email = email
column [text] Comment = comments
column [text] PasswordQuestion = password_question
column [text] PasswordAnswer = password_answer
column [bool] IsApproved = is_approved
column [date] LastActivityDate = last_activity_date
column [date] LastLoginDate = last_login_date
column [date] LastPasswordChangedDate = last_password_changed_date
column [date] CreationDate = creation_date
column [bool] IsLockedOut = is_locked_out
column [date] LastLockedOutDate = last_locked_out_date
column [int] FailedPasswordAttemptCount = pwd_attempt_count
column [date] FailedPasswordAttemptWindowStart = pwd_attempt_window_start
column [int] FailedPasswordAnswerAttemptCount = pwd_ans_attempt_count
column [date] FailedPasswordAnswerAttemptWindowStart = pwd_ans_attempt_window_start

table Roles = roles
column [int|uiid] RoleID = role_id
column [text] RoleName = role_name

table UserRoles = user_roles
column [int|uiid] UserID = user_id
column [int|uiid] RoleID = role_id

The configuration will guide the code generator in mapping the logical tables Users, Roles, and UserRoles to the physical tables in the database.

Generate the project to create the custom membership and role provider.

Tuesday, December 4, 2012PrintSubscribe
Basic Membership Provider for Oracle Server

Requirements

A basic membership provider requires a dedicated table to keep track of user names, passwords, and emails.

A role provider will require two tables to keep track of roles and associations of users with roles.

"Users", "Roles", and "User_Roles" table schema for basic membership provider.

These are the basic membership and role provider tables with “identity” primary keys.

SQL:

create sequence users_seq;

create table users
(
    user_id 
int not null primary key,
    user_name varchar2(128) not null,
    password varchar2(128) not null,
    email varchar2(128)
)
;

create or replace trigger users_trigger
    before 
insert
 on users
   
for each row
declare

    u_id users.user_id%type;
begin
  select users_id_seq.nextval into u_id from dual;
  :new.user_id := u_id;
end users_trigger;
/

create 
sequence roles_seq;

create table roles
(
    role_id 
int not null primary key,
    role_name varchar2(50)
)
;

create or replace trigger roles_trigger
    before 
insert
  on roles
   
for each row
declare

    r_id roles.role_id%type;
begin
  select roles_seq.nextval into r_id from dual;
  :new.role_id := r_id;
end roles_trigger;
/

create table 
user_roles
(
    user_id 
int not null,
    role_id int not null,
  constraint pk_user_roles primary key(user_id, role_id),
  constraint fk_users foreign key(user_id) references users(user_id),
  constraint fk_roles foreign key(role_id) references roles(role_id)
)
;

These are the basic membership and role provider tables with “unique identifier” primary keys.

SQL:

create table users
(
    user_id 
raw(16) default sys_guid() not null primary key,
    user_name varchar2(128) not null,
    password varchar2(128) not null,
    email varchar2(128)
);

create table 
roles
(
    role_id 
raw(16) default sys_guid() not null primary key,
    role_name varchar2(50
)
)
;

create table 
user_roles
(
    user_id 
raw(16) not null,
    role_id raw(16) not null,
    constraint pk_user_roles primary key(user_id, role_id),
    constraint fk_users foreign key(user_id) references users(user_id),
    constraint fk_roles foreign key(role_id) references 
roles(role_id)
)
;

Configuration

Use one of the scripts above to create the tables in your database.

Start Code On Time web application generator, select the project name on the start page, and choose Settings. Select Authentication and Membership.

Select “Enable custom membership and role providers” option and enter the following configuration settings.

table Users = users
column [int|uiid] UserID = user_id
column [text] UserName = user_name
column [text] Password = password
column [text] Email = email

table Roles = roles
column [int|uiid] RoleID = role_id
column [text] RoleName = role_name

table UserRoles = user_roles
column [int|uiid] UserID = user_id
column [int|uiid] RoleID = role_id

The configuration will guide the code generator in mapping the logical tables Users, Roles, and UserRoles to the physical tables in the database.

Generate the project to create the custom membership and role provider.