The Persistence Tier in Java

Generator QR Code 2d barcode in Java The Persistence Tier
CHAPTER 9 The Persistence Tier
Encode QR-Code In Java
Using Barcode printer for Java Control to generate, create QR Code 2d barcode image in Java applications.
time, arena, home and visitor teams, scores, and so on As a result, when you specify a table, you will define the column headers and their data types SQL has many data types For your tables, you will use date and time expressions (such as 2006-APR-13 09:54:00 ) and string formats (such as Snowflakes ) When you specify a table, you will need to specify the data type associated with each column For example, arena is of type varchar(40), meaning that it is a string up to 40 characters Note that different databases may support different data types, so you should consult their documentation to avoid portability problems Enter the following code in the SQL editor (see Example 92)
Bar Code Creation In Java
Using Barcode printer for Java Control to generate, create bar code image in Java applications.
Example 92 Listing of createtablessqlpage
Barcode Recognizer In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
DROP TABLE APPLEAGUE ; DROP TABLE APPSCHEDULE ; DROP TABLE APPGAME ; CREATE TABLE APPLEAGUE ( ID INT NOT NULL, NAME VARCHAR(40) ); CREATE TABLE APPSCHEDULE ( ID INT NOT NULL, LEAGUEID INT NOT NULL, NAME VARCHAR(40) ); CREATE TABLE APPGAME ( ID INT NOT NULL, SCHEDULEID INT NOT NULL, DATE DATE NOT NULL, TIME TIME NOT NULL, ARENA VARCHAR(40), HOME VARCHAR(40), VISITOR VARCHAR(40), HOMESCORE VARCHAR(40), VISITORSCORE VARCHAR(40) )
Printing QR-Code In Visual C#.NET
Using Barcode creation for .NET framework Control to generate, create QR Code 2d barcode image in .NET framework applications.
11 In the SQL editor, right click, and invoke the Run SQL menu item The SQL editor will use the current database connection to run the SQL You can switch the database by changing the connection Use the Use Database Connection context menu item to do this After you run the SQL, you will see the results in the Data Output view (see Figure 911)
Generating QR Code In .NET
Using Barcode encoder for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
Iteration 1: Creating a Database
Generating QR In Visual Studio .NET
Using Barcode creation for .NET framework Control to generate, create QR-Code image in VS .NET applications.
Figure 911 Data Output Window SQL Run
Create QR Code In VB.NET
Using Barcode maker for VS .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
Notice that the DROP statements resulted in an error because, to begin with, there were no tables to delete The CREATE statements completed successfully In the next step you will browse the database and the new tables, and edit table data to add new games
Make UPC A In Java
Using Barcode drawer for Java Control to generate, create Universal Product Code version A image in Java applications.
CHAPTER 9 The Persistence Tier
Making Barcode In Java
Using Barcode generator for Java Control to generate, create barcode image in Java applications.
12 Select the leaguedb database in Database Explorer, right click, and invoke the Refresh command This action retrieves the new table information from the database Expand the Schemas item and the APP schema within Expand the Tables item, and select the Game table and expand its contents The Database Explorer view allows you to browse the tables, columns, and other useful information (see Figure 912)
DataMatrix Creator In Java
Using Barcode drawer for Java Control to generate, create Data Matrix image in Java applications.
Figure 912 Database Explorer GAME Table
Generate Barcode In Java
Using Barcode generation for Java Control to generate, create bar code image in Java applications.
13 Using the Database Explorer you can browse and directly update data in the database To do this, right click the GAME table and invoke the Data Edit menu item A table editor opens (see Figure 913) 14 Click <new row> to enter new games For example, enter 1, 1, 01/07/2006, 6:30:00 PM, Hillview High School, Ladybugs, Vixens, 3, 7 for the ID, schedule id, date, time, arena, home team, visitor team, and scores, respectively Repeat the same steps to enter other game data (see the example listings in the section The Data Access Layer in 8) Hit Ctrl+S to save and commit the data to the database
Painting Barcode In Java
Using Barcode creation for Java Control to generate, create barcode image in Java applications.
Iteration 1: Creating a Database
Create Postnet 3 Of 5 In Java
Using Barcode creation for Java Control to generate, create Postnet image in Java applications.
Figure 913 Table Editor
Generate Data Matrix In C#.NET
Using Barcode generator for .NET Control to generate, create Data Matrix image in Visual Studio .NET applications.
15 In embedded single-user mode, Derby only supports a connection to a given database from one process You will need to disconnect from Derby before using the database in your Web application Right click on leaguedb in the Database Explorer and invoke the Disconnect menu item
Making Barcode In C#.NET
Using Barcode printer for .NET framework Control to generate, create bar code image in .NET framework applications.
Summary of Iteration 1
UPC-A Supplement 5 Scanner In .NET Framework
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in VS .NET applications.
In this iteration you created a database connection to Apache Derby using the Database Explorer view You added tables to the database by executing SQL statements using the SQL scrapbook Finally, you added some sample data to the table using the table editor You are now ready to develop Java classes that insert and query data from these tables
Make Barcode In .NET
Using Barcode creation for VS .NET Control to generate, create bar code image in .NET framework applications.
CHAPTER 9 The Persistence Tier
Barcode Maker In C#
Using Barcode generator for .NET Control to generate, create bar code image in Visual Studio .NET applications.
Iteration 2: Data Layer
Paint GTIN - 12 In .NET Framework
Using Barcode creator for .NET framework Control to generate, create UPC-A Supplement 5 image in .NET framework applications.
Recall the layered architecture that was introduced in 8; the data layer provides an abstraction between the business tier and the persistence tier The business tier must be independent of the persistence mechanism and the mapping tools that save the objects to the database This goal was achieved by defining a set of interfaces for DAO In this iteration, you will implement the data layer API as described in the Use JDBC APIs to Map Objects to a Database section In this iteration, you ll perform the following tasks:
Scanning European Article Number 13 In .NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET applications.
Use JDBC APIs to implement the LeagueDAO interface (see The Data Access Layer section in 8) and replace the example DAO implementation with this new class Test LeagueDAO with the previously developed Web application (see 8) to display the games stored in the database
1 Recall the LeagueFacade interface and LeagueFacadeImpl from the LeaguePlanetModel utility project (see The Service Layer section in 8) The fa ade object provides game information as a service This object delegates persistence-related tasks to the classes that you will now implement DAO interfaces provide the API to the data layer This is the interface that your new DAO will implement (see Example 93)