BEA 7 manual Jvm, Null Attributes

Models: 7

1 146
Download 146 pages 30.54 Kb
Page 78
Image 78

2 Upgrading WebLogic Server 4.5 and 5.1 to Version 7.0

Null Attributes

Due to a change in the JSP specification, null request attributes now return the string "null" instead of an empty string. WebLogic Server versions since 6.1 contain a new flag in weblogic.xml called printNulls which is true by default, meaning that returning "null" is the default. Setting printNulls to false ensures that expressions with "null" results are printed as an empty string, not the string "null."

An example of configuring the printNulls element in weblogic.xml:

<weblogic-web-app> <jsp-param> <param-name>printNulls</param-name> <param-value>false</param-value> </jsp-param> </weblogic-web-app>

JVM

WebLogic Server 7.0 installs the Java Virtual Machine (JVM), JDK 1.3.1_02, with the server installation. The setenv.sh scripts provided with the server all point to the JVM. The latest information regarding certified JVMs is available at the Certifications Page.

RMI

The following tips are for users porting to WebLogic Server 7.0 who used RMI in their previous version of WebLogic Server:

„Re-run the WebLogic RMI compiler, weblogic.rmic, on any existing code to regenerate the wrapper classes so they are compatible with WebLogic Server 7.0.

„Use java.rmi.Remote to tag interfaces as remote. Do not use

weblogic.rmi.Remote.

„Use java.rmi.*Exception (e.g., import java.rmiRemoteException;). Do not use weblogic.rmi.*Exception.

2-30BEA WebLogic Server 7.0 Upgrade Guide

Page 78
Image 78
BEA 7 manual Jvm, Null Attributes

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.