Converting and Porting Your Existing Applications into Web Applications

Porting a Simple Servlet from WebLogic Server 5.1 to WebLogic Server 7.0

The following procedure ports the simple Hello World Servlet that was provided with WebLogic 5.1 Server to WebLogic Server 7.0.

1.In WebLogic Server 7.0, create the correct directory structure, as described in Administration and Configuration in Programming WebLogic Server HTTP

Servlets. This involves creating a root application directory, such as C:\hello, as well as a C:\hello\WEB-INF directory and a C:\hello\WEB-INF\classes directory. Place the HelloWorld.Servlet.java file inside the C:\hello\WEB-INF\classes directory.

2.Create a web.xml file for this servlet. If you have converted your weblogic.properties file, a web.xml file has already been created for you. If you registered HelloWorldServlet in your weblogic.properties file before you converted it, the servlet will be properly configured in your new web.xml file. An XML file can be created with any text editor. The following is an example of a basic web.xml file that could be used with the HelloWorldServlet.

<!DOCTYPE web-app (View Source for full doctype...)>

-<web-app>

-<servlet>

<servlet-name>HelloWorldServlet</servlet-name> <servlet-class>examples.servlets.HelloWorldServlet</servlet-class>

</servlet>

- <servlet-mapping> <servlet-name>HelloWorldServlet</servlet-name> <url-pattern>/hello/*</url-pattern> </servlet-mapping>

</web-app>

For more information on web.xml files, see Writing Web Application Deployment Descriptors in Assembling and Configuring Web Applications. A weblogic.xml file is not necessary with such a simple, stand-alone servlet as HelloWorld.

For more information on weblogic.xml files, see Writing the WebLogic-Specific Deployment Descriptor in Assembling and Configuring Web Applications.

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7 specifications

BEA 7, a significant product from BEA Systems, represents a cornerstone in enterprise application integration and service-oriented architecture. As a comprehensive solution for developing, deploying, and maintaining enterprise-level applications, it brings a host of features that cater to the needs of businesses seeking agility and reliability in their IT infrastructure.

One of the standout characteristics of BEA 7 is its robust support for service-oriented architecture (SOA). This enables businesses to create applications as loosely coupled services, facilitating easier integration and scalability. The platform's emphasis on middleware technologies allows organizations to streamline their IT operations, enhance interoperability, and reduce time to market for new applications.

BEA 7 includes a powerful application server that provides a reliable runtime environment for managing applications. Offering high availability and scalability, it can successfully handle the demands of high-volume transactions while ensuring optimal performance. The built-in clustering capability ensures that applications can remain operational even in the event of server failures, which is critical for mission-critical applications.

Another notable feature of BEA 7 is its capabilities for web services. With support for industry standards such as XML, SOAP, and WSDL, users can easily expose and consume services across diverse platforms. This allows businesses to take full advantage of an interconnected ecosystem and simplifies the process of integrating various applications and data sources.

Security is a paramount consideration in BEA 7, which includes strong authentication, authorization, and encryption mechanisms to protect sensitive data. The platform's comprehensive security features ensure compliance with regulatory requirements and protect against potential threats, which is particularly important for sectors handling sensitive information, such as finance and healthcare.

BEA 7 also embraces innovative technologies such as the Java EE platform, facilitating the development of cross-platform applications. The integrated development environment (IDE) offers numerous tools for developers, making it easier to design, debug, and deploy applications. Developers benefit from built-in support for commonly used frameworks and libraries, improving productivity and enabling rapid application development.

In summary, BEA 7 stands out as a powerful enterprise solution, distinguished by its support for SOA, robust application server capabilities, web services integration, strong security features, and a developer-friendly environment. These attributes make BEA 7 an essential tool for organizations aiming to enhance their operational efficiency and adapt to the increasingly dynamic business landscape.
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