Difference between WebSphere and WebLogic

Difference between WebSphere and WebLogic

WebSphere versions 3.0, 4.0, and 5.1, and WebLogic 8.1 are J2EE compliant application servers. These application servers differ in their architecture, platform support, database connectivity, legacy system support, development options, J2EE technologies supported, and the manner in which Web components are deployed.

This article explains the differences between WebSphere 3.0 or later and WebLogic 8.1.

Comparing WebSphere 3.0 or later with WebLogic 8.1

WebSphere 3.0 and 4.0 are not fully compliant with J2EE 1.3. WebSphere 5.1 and WebLogic 8.1 are fully compliant with J2EE 1.3. There are some differences between WebSphere 3.0 or later and WebLogic 8.1 in terms of architecture, platform support, database connectivity, legacy system support, development tools provided, J2EE technologies supported, and development and deployment of Web components.

Difference in Architecture

WebSphere 3.0 or later enterprise platform consists of Foundation and Foundation Extensions. Foundation consists of application servers and products that allow integration of applications with processes. Foundation Extensions include development, presentation, and deployment tools that are used for building and managing e-business applications. The development tools provide an integrated environment for development of applications. The presentation tools include graphical or voice-based tools that are used to develop applications to personalize Web pages. The deployment tools include those that are used for development and deployment of applications.

WebLogic 8.1 enterprise platform consists of a WebLogic Server, WebLogic Workshop, WebLogic Integration, WebLogic Portal, Liquid Date for WebLogic, WebLogic Tuxedo, and WebLogic JRockit. In addition, WebLogic 8.1 provides a security framework that supports various security processes and mechanisms, such as auditing, authentication, authorization, Secure Socket Layer (SSL), and firewalls.

Difference in Platform Support

WebSphere 3.0 or later and WebLogic 8.1 differ in the support they provide for various platforms.

 lists the platforms supported by WebSphere 3.0 or later and WebLogic 8.1:

Platforms Supported by WebSphere 3.0 or Later and WebLogic 8.1

WebSphere 3.0

WebSphere 4.0

WebSphere 5.1

WebLogic 8.1

Windows NT Server

IBM AIX

Sun Solaris

IBM AIX

Sun Solaris

Microsoft Windows NT, Microsoft Windows 2000, Microsoft Windows 2000 Advance Server

Linux

OS/400

Novell Netware

Hewlett-Packard HP-UX

Windows NT/Windows 2000

HP-UX

Linux

OS/400

z/OS

Sun Solaris

Windows NT/Windows 2000

Sun Solaris

Caldera OpenUNIX, Tru64 UNIX

Linux

z/OS

OpenVMS

Difference in Database Connectivity

 lists the databases supported by WebSphere 3.0 or later and WebLogic 8.1:

Databases Supported by WebSphere 3.0 or Later and WebLogic 8.1

WebSphere 3.0

WebSphere 4.0

WebSphere 5.1

WebLogic 8.1

IBM DB2 Universal Database 5.2

Oracle 8.0.5

IBM DB2 Universal Database

Oracle

Microsoft SQL Server 7.0

Sybase

Informix

IBM DB2 UDB 7.2W Enterprise Edition/Workgroup Edition

Oracle 8i Release 3(8.1.7)

Sybase Adaptive Server 12.0

Informix Dynamic Server 9.2.1/9.3

MS SQL Server 7.0 SP2

MS SQL Server 2000

Oracle 8.1.6/8.1.7

MS SQL Server 6.0 or 6.5 SP3

Informix OnLine 7.2x/7.3/9.x

Any DBMS that supports standard JDBC driver

Difference in Legacy System Support

WebSphere 3.0 or later converts legacy data into eXtensible Markup Language (XML) documents to communicate with the client. WebLogic 8.1 uses Java Adapter for Mainframe (JAM) to communicate with the mainframe system. The JAM gateway inside the WebLogic application server communicates with a Communication Resource Manager (CRM), which is present in the legacy systems.

Difference in Development Tools

WebSphere 3.0 or later and WebLogic 8.1 provide different tools for the development and deployment of J2EE applications.

The development tools for WebSphere 3.0 or later are:

WebSphere Studio Homepage Builder

WebSphere Studio Application Developer

WebSphere Studio Site Developer

WebSphere Studio Enterprise Developer

Rational Web Developer for WebSphere Software

Rational Application Developer for WebSphere Software

The development tools for WebLogic 8.1 are:

WebLogic Workshop

WebLogic Builder

DDinit

EJBGen

WebLogic Administration Console

Client Deployer

WebLogic Deployer

WebLogic Tuxedo Connector

XML Editor

Difference in the J2EE Technologies Supported

lists the versions of J2EE technologies supported by WebSphere and WebLogic:

 J2EE Technologies Supported by WebSphere 3.0 or Later and WebLogic 8.1

Technology

WebSphere 3.0

WebSphere 4.0

WebSphere 5.1

WebLogic 8.1

JSP

0.91 and 1.0

1.1

1.2

1.2

Servlet

2.1

2.2

2.3

2.3

EJB

1.0

1.1

2.0

2.0

JDBC

JDBC 2.0

JDBC 2.0

JDBC 2.0

JDBC 2.0

JDK

J2SDK 1.2

J2SDK 1.3

J2SDK 1.4

J2SDK 1.4

JNDI

1.1

1.1

1.2

1.2

Difference in Development and Deployment of Web Components

Web components, such as JSPs and servlets, are developed and deployed differently in WebSphere 3.0, 4.0 or 5.1 as compared to WebLogic 8.1. The migration of servlets requires change of methods from WebSphere 3.0 and 4.0 to WebLogic 8.1. To migrate the JSPs, you need to perform the following tasks:

Modify the JSP 0.91 version pages running on WebSphere 3.0 to run on WebLogic 8.1 due to the change of the bean invocation method used in version 1.2.

Modify the JSP 1.0 version pages running on WebSphere 4.0 to run on WebLogic 8.1 due to the change of the bean invocation method used in version 1.2.

JSP 1.1 version pages running on WebSphere 4.0 need no modification to run on WebLogic 8.1 but they will not support the JSP 1.1 version enhancements.

Modify the database access tags provided by JSP 0.91 running on WebSphere 3.0 to make them compatible to run on WebLogic 8.1.

Difference in JSPs and Servlets

WebSphere 3.0 supports JSP 0.91 and 1.0, and servlets 2.1. WebLogic 8.1supports JSP 1.1 or later, and servlets 2.3. In servlets, the definition of methods in the HTTPSession class is different for WebSphere 3.0 and 4.0 as compared to WebLogic 8.1.

 lists the different methods of the HTTPSession class supported by WebSphere 3.0 or later and WebLogic 8.1:

 HTTPSession Methods Supported by WebSphere 3.0 or Later and WebLogic 8.1

WebSphere 3.0/ 4.0

WebSphere 5.1/ WebLogic 8.1

getValue()

getValueNames()

removeValue()

setValue()

getAttribute()

getAttributeNames()

removeAttribute()

setAttribute()

Difference in EJBs

WebSphere 3.0 and 4.0 and WebLogic 8.1 differ in the way they support the development and deployment of EJBs. WebSphere 3.0 and 4.0 support EJB 1.0 and 1.1. WebLogic 8.1 supports EJB 2.0. When migrating from WebSphere 3.0 or 4.0 to WebLogic 8.1, you need to modify the source code and the deployment descriptors. The formats of deployment descriptors used in WebSphere 3.0 or later and WebLogic 8.1 are binary and XML.

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