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Oracle® Fusion Middleware Understanding Oracle WebLogic Server
12c Release 1 (12.1.1)

Part Number E24446-03
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1 Introduction

This chapter provides an overview of Oracle WebLogic Server features and describes how you can use them to create enterprise ready-solutions. This chapter includes the following sections:

Product Overview

Oracle WebLogic Server is a scalable, enterprise-ready Java Platform, Enterprise Edition (Java EE) application server. The WebLogic Server infrastructure supports the deployment of many types of distributed applications and is an ideal foundation for building applications based on Service Oriented Architectures (SOA). SOA is a design methodology aimed at maximizing the reuse of application services. See http://www.oracle.com/technology/tech/soa/index.html.

The WebLogic Server complete implementation of the Java EE 6.0 specification provides a standard set of APIs for creating distributed Java applications that can access a wide variety of services, such as databases, messaging services, and connections to external enterprise systems. End-user clients access these applications using Web browser clients or Java clients. It also supports the Spring Framework, a programming model for Java applications which provides an alternative to aspects of the Java EE model. See Programming Models.

In addition to the Java EE implementation, WebLogic Server enables enterprises to deploy mission-critical applications in a robust, secure, highly available, and scalable environment. These features allow enterprises to configure clusters of WebLogic Server instances to distribute load, and provide extra capacity in case of hardware or other failures. New diagnostic tools allow system administrators to monitor and tune the performance of deployed applications and the WebLogic Server environment itself. You can also configure WebLogic Server to monitor and tune application throughput automatically without human intervention. Extensive security features protect access to services, keep enterprise data secure, and prevent malicious attacks.

Figure 1-1 shows how WebLogic Server fits into the overall Oracle Fusion Middleware stack.

Figure 1-1 Oracle Fusion Middleware Overview

Surrounding text describes Figure 1-1 .

Programming Models

WebLogic Server provides complete support for the Java EE 6.0 specification at http://www.oracle.com/technetwork/java/javaee/tech/index-jsp-142185.html. For more information, see the following WebLogic Server programming guides:

In addition, WebLogic Server supports applications developed using the Spring Framework, an open source application framework for the Java platform. Spring Support in Oracle WebLogic Server provides an overview of Spring and WebLogic Server support for developing and deploying Spring applications. It also gives examples of how to write Spring applications for WebLogic Server. See also SpringSource at http://www.springsource.org/.

High Availability

The following WebLogic Server features and tools support the deployment of highly-available and scalable applications:

Diagnostic Framework

The WebLogic Diagnostic Framework is a monitoring and diagnostic service that lets you create, collect, analyze, archive, and access diagnostic data generated by a running server and its deployed applications. This data provides insight into the runtime performance of WebLogic Server instances and deployed applications and lets you isolate and diagnose faults and performance bottlenecks when they occur.

Security

The WebLogic Server security architecture provides a comprehensive, flexible security infrastructure designed to address the security challenges of making applications available on the Web. WebLogic security can be used standalone to secure WebLogic Server applications or as part of an enterprise-wide, security management system that represents a best-in-breed security management solution. See "Overview of the WebLogic Security Service."

Client Options

In addition to support for browser-based Web application clients, WebLogic Server also supports a variety of client types for creating rich GUI applications or simple command-line utilities. These client types include: RMI-IIOP, T3, Java SE clients, Java EE thin clients, CORBA/IDL clients, and C++ clients that communicate with BEA Tuxedo. See Programming Stand-alone Clients for Oracle WebLogic Server.

Integration with Oracle WebLogic Suite

WebLogic Server provides the core application server runtime within the integrated Oracle WebLogic Suite Java infrastructure. This integrated infrastructure enhances application performance, improves application availability, and enables predictable and reliable application scalability with high quality of service. WebLogic Suite includes highly productive development tools based on Oracle JDeveloper and Oracle Enterprise pack for Eclipse, and fully integrated management for large-scale administration and operations with Oracle Enterprise Manager. Taken together, the development, runtime and management capabilities of WebLogic Suite provide the foundation for implementing mission-critical enterprise applications.

WebLogic Suite contains the following server-side components:

Integration with Other Systems

WebLogic Server provides a variety of tools to integrate your applications with disparate systems. These tools include Web Services, Resource Adapters, the JMS .NET client, the JMS C client, tooling for integrating JMS providers options, Advanced Queuing, and RMI.

Integration with Web Servers

Plug-ins are provided with your WebLogic Server installation that allow WebLogic Server to operate with Web servers from Apache and Microsoft. Typically, these Web servers serve static HTML content while requests for dynamic Web content such as JSPs are directed to the WebLogic Server environment. See Using Web Server Plug-Ins with WebLogic Server.

WebLogic Server API Examples and Sample Application

Code examples demonstrating Java EE APIs and other WebLogic Server features are provided with your WebLogic Server installation. To work with these examples, select the custom installation option when installing WebLogic Server, and select to install the Server Examples. To access the code examples, start the WebLogic Server Examples domain using the WebLogic Examples Server entry in the Windows Start menu, or launch the startWebLogicEx.cmd or startWebLogicEx.sh script from WL_HOME/samples/domains/wl_server, where WL_HOME is the directory where you installed WebLogic Server. As they become available, you can also download additional examples.

Along with the code examples, two versions of a complete sample application, called Avitek Medical Records (or MedRec), are installed when you install the examples, as described above.

The original MedRec (which was included in previous versions of WebLogic Server) is a WebLogic Server sample application suite that concisely demonstrates all aspects of the Java EE platform. MedRec is designed as an educational tool for all levels of Java EE developers. It showcases the use of each Java EE component and illustrates best practice design patterns for component interaction and client development. MedRec also illustrates best practices for developing applications on WebLogic Server.

The Spring version of MedRec, called MedRec-Spring is MedRec recast using the Spring Framework. If you are developing Spring applications on WebLogic Server, you should review the MedRec-Spring sample application. In order to illustrate how Spring can take advantage of the enterprise features of WebLogic Server, MedRec was rearchitected to replace core Java EE components with their Spring counterparts. The functionality in the original version of MedRec is reimplemented using Spring in MedRec-Spring. Refer to the MedRec-Spring sample for details.

To launch MedRec, select Start Medical Records Server from the Windows Start menu or run startWebLogic.cmd or startWebLogic.sh script from WL_HOME/samples/domains/medrec, where WL_HOME is the directory where you installed WebLogic Server.

To launch MedRec-Spring, select Start Medical Records Server (Spring Version) from the Windows Start menu or run the startWebLogic.cmd or startWebLogic.sh script from WL_HOME/samples/domains/medrec-spring, where WL_HOME is the directory where you installed WebLogic Server.

Upgrade

Tools and documentation are provided to help you migrate applications implemented on earlier versions of WebLogic Server to the current WebLogic Server environment. See the Upgrade Guide for Oracle WebLogic Server.