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JDBC 4.0 and Oracle JDeveloper for J2EE Development
JDBC 4.0 and Oracle JDeveloper for J2EE Development

JDBC 4.0 and Oracle JDeveloper for J2EE Development:

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JDBC 4.0 and Oracle JDeveloper for J2EE Development

Chapter 2. Configuring JDBC in Oracle JDeveloper

Oracle JDeveloper is a free Integrated Development Environment (IDE) for modeling, developing, debugging, optimizing, and deploying Java applications. JDeveloper 10g is used to develop J2EE applications comprising the JSPs, EJBs, Struts, Servlets, and the Java classes that may require accessing a database table in the Oracle 10g Database, or a third-party database. Unlike Eclipse, which requires a plugin, JDeveloper has a built-in provision to establish a JDBC connection with a database. JDeveloper is the only Java IDE with an embedded application server, the Oracle Containers for J2EE (OC4J). This database-based web application may run in JDeveloper without requiring a third-party application server. However, JDeveloper also supports third-party application servers. Starting with JDeveloper 11, application developers may point the IDE to an application server instance (or OC4J instance), including third-party application servers that they...

Connection Pooling and DataSource


The javax.sql package provides the API for server-side database access. The main interfaces in the javax.sql package are DataSource, ConnectionPoolDataSource, and PooledConnection. The DataSource interface represents a factory for connections to a database. In Chapters 1 and 2, we obtained a Connection object using the DriverManager class. DataSource is an alternative and a preferred method of obtaining a JDBC connection. An object that implements the DataSource interface is typically registered with a Java Naming and Directory API-based naming service. DataSource interface implementation is driver-vendor specific. The DataSource interface has three types of implementations:

  • Basic implementation: In basic implementation there is 1:1 correspondence between a client's Connection object and the connection with the database. This implies that for every Connection object, there is a connection with the database. With the basic implementation, the overhead of...

Setting the Environment


Before getting started, we have to install the JDeveloper 10.1.3 IDE and the MySQL 5.0 database. Download JDeveloper from: http://www.oracle.com/technology/software/products/jdev/index.html. Download the MySQL Connector/J 5.1, the MySQL JDBC driver that supports JDBC 4.0 specification. To install JDeveloper extract the JDeveloper ZIP file to a directory. Log in to the MySQL database and set the database to test. Create a database table, Catalog, which we will use in a web application. The SQL script to create the database table is listed below:

CREATE TABLE Catalog(CatalogId VARCHAR(25)
PRIMARY KEY, Journal VARCHAR(25), Publisher VARCHAR(25),
Edition VARCHAR(25), Title Varchar(45), Author Varchar(25));
INSERT INTO Catalog VALUES('catalog1', 'Oracle Magazine',
'Oracle Publishing', 'Nov-Dec 2004', 'Database Resource Manager', 'Kimberly Floss');
INSERT INTO Catalog VALUES('catalog2', 'Oracle Magazine', 'Oracle Publishing', 'Nov-Dec 2004', 'From ADF UIX to JSF', 'Jonas...

JDBC Configuration Errors


You might get errors while configuring a JDBC connection. If you are using MySQL, and the connection URL is incorrect, or the MySQL database is not running, the following error message is generated:

Communications link failure

If you are using Oracle database, some possible connection configuration errors are listed below:

IO exception: The Network Adapter could not establish the connection
IO exception: Connection refused

The The Network Adapter could not establish the connection exception is caused by one or more of the following configuration errors:

  1. 1. The database host name, port number, or database instance name is wrong.

  2. 2. The database TNSListener has not been started. The TNSListener may be started with the lsnrctl utility.

C:\>lsnrctl start

The Connection refused exception is caused by one or more of the following configuration errors:

  1. 1. The database SID specified is incorrect.

  2. 2. The database instance has not been started. To start the database instance...

Creating a Managed Data Source


In the previous section, a JDBC connection was obtained in the Connections navigator. A corresponding JNDI managed data source becomes available for the Connections navigator connection. A data source object is configured with a JNDI Name binding in the OC4J server integrated with JDeveloper. A data source may also be configured in the Embedded OC4J Server Preferences window directly, or may be configured declaratively by modifying the data-sources.xml file. We will discuss each of these methods for creating a data source. A data source may be configured at the Global level or the Current Workspace level. A Global data source is available to all applications while a Current Workspace data source is available only in the current workspace. To create a new Global data source, select Tools | Embedded OC4J Preferences and select the Global | Data Sources node, and click on the New button.

Before we are able to configure a managed data source, we need to configure...

Connecting to a Database from a Web Application


If a Java application is used to connect to a database, a JDBC connection may be obtained using the getConnection() method of the DriverManager class. If a JDBC connection is to be obtained in a web application, a data source with a JNDI naming service binding must be configured in an application server, such as the OC4J embedded in JDeveloper IDE. The data source object configured in data-sources.xml may be used in a Servlet or JSP in JDeveloper. In this section, we will connect to MySQL database using the managed data source we configured in the previous section. First, we need to create a project in JDeveloper with File | New. In the New Gallery window, select General | Applications in Categories and Application in Items and click on OK. Specify the Application Name in the Create Application window and click on the OK button. Specify the Project Name in the Create Project window and click on the OK button. A new project is added to the...

JDBC 4.0 Version


The OC4J embedded in JDeveloper 10g does not support JDBC 4.0. When support gets added for JDBC 4.0, JDBC 4.0's features may be added to the JSP web application that we have developed in the previous section. Provision to set client info properties on the Connection object is a new feature in JDBC 4.0. Client info properties may be set using the setClientInfoProperty() method of the Connection object. Set client info properties ApplicationName, ClientUser, and ClientHostname as follows:

connection.setClientInfo("ApplicationName","DataDirectApp");
connection.setClientInfo("ClientUser","DataDirect");
connection.setClientInfo("ClientHostname","DataDirectHost");

If the database supports statement caching, we can set statement pooling to true. To find out whether the database supports statement pooling create a DatabaseMetaData object. Using the supportsStatementPooling() method test if the database supports statement pooling. If the database supports statement pooling check...

Summary


JDeveloper IDE provides a built-in Connections navigator to configure a connection with any relational database for which a JDBC driver is available. A connection configured in the Connections navigator is also available as a data source. In this chapter, we have configured a JDBC connection in JDeveloper with MySQL database using the MySQL Connector/J 5.1 JDBC 4.0 driver. We also created a managed data source in the OC4J embedded in JDeveloper and used the data source in a web application. Subsequently, we discussed the JDBC 4.0 version of the web application.

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What you will learn

  • In this book you will learn about the following: JDBC 4.0 specifications—including the new features Configuring JDBC in Oracle JDeveloper IDE Creating, modifying, and querying a database with the JSTL SQL Tag Library Configuring JDBC in JBoss application server, WebLogic server, and WebSphere application server Mapping an XML document to a database table and vice versa Modifying a database table from an XML document and creating an XSQL Page to run an SQL Query and generate XML Implementing Oracle Web RowSet to fetch the disconnected data Creating Excel spreadsheets, PDFs, and Excel reports using JasperReports and the Apache POI HSSF library Creating JSF Data Tables, JSF Panel Grids, and business components from Oracle databases with JDeveloper Creating and managing database tables using Hibernate
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Publication date : Apr 30, 2008
Length: 448 pages
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Language : English
ISBN-13 : 9781847194305
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Table of Contents

15 Chapters
JDBC 4.0 Chevron down icon Chevron up icon
Configuring JDBC in Oracle JDeveloper Chevron down icon Chevron up icon
Connecting to a Database with JSTL SQL Tag Library Chevron down icon Chevron up icon
Configuring JDBC in JBoss Application Server Chevron down icon Chevron up icon
Configuring JDBC in WebLogic Server Chevron down icon Chevron up icon
Configuring JDBC in WebSphere Application Server Chevron down icon Chevron up icon
XML SQL Utility Chevron down icon Chevron up icon
XSQL Chevron down icon Chevron up icon
Oracle Web RowSet Chevron down icon Chevron up icon
Creating a JSF Data Table Chevron down icon Chevron up icon
Creating a JSF Panel Grid Chevron down icon Chevron up icon
Creating a Report with JasperReports Chevron down icon Chevron up icon
Creating a Spreadsheet with Apache POI Chevron down icon Chevron up icon
Creating Oracle ADF Business Components Chevron down icon Chevron up icon
Hibernate Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
(2 Ratings)
5 star 0%
4 star 50%
3 star 0%
2 star 50%
1 star 0%
Edwin Biemond Dec 01, 2008
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
I thought this book would be all about the JDBC hardcore programming and the 4.0 features. But I was very wrong, it's all about the frameworksthat uses the jdbc driver. The best thing this book is very actual with the new JDeveloper 11g which uses the jdbc 4 library as default and besides this, the book has also a chapter about the WebLogic Application server ( And Jboss, WebSphere). JDBC plays an important role in J2EE Web Applications and this books gives a nice overview / quickstart in JDeveloper of all the important java frameworks which uses the jdbc driver. Like XSQL, Jasper Reports to generate csv,excel and pdf, Apache POI for generating excel and ADF Business Components & Hibernate as persistence frameworks. This book is gives the Oracle Java Developer a jumpstart to the important jdbc frameworks with JDeveloper as IDE.
Amazon Verified review Amazon
Bob Sep 01, 2009
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
This book did not leave up to my expectations. This book is written mostly based on JDeveloper 10g. JDeveloper 11g is quiet different in many ways. Navigation paths in this book are from 10g and some are no longer valid with 11g.
Amazon Verified review Amazon
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