System Services

The main infrastructure services provided by Java Enterprise System components can be categorized as follows:

• Portal services. These services enable mobile employees, telecommuters, knowledge workers, business partners, suppliers, and customers to securely access their personalized corporate portal from anywhere outside the corporate network through the Internet. These services provide anytime, anywhere access capabilities to user communities, delivering integration, aggregation, personalization, security, mobile access, and search.

• Communications and collaboration services. These services enable the secure interchange of information among diverse user communities. Specific capabilities include messaging, real-time collaboration, and calendar scheduling in the context of the user\qs business environment.

• Network identity and security services. These services improve security and protection of key corporate information assets by ensuring that appropriate access control policies are enforced across all communities, applications, and services on a global basis. These services work with a repository for storing and managing identity profiles, access privileges, and application and network resource information.

• Web and application services. These services enable distributed components to communicate with one another and support the development, deployment, and management of applications for a broad range of servers, clients, and devices. These services are based on Java 2 Platform, Enterprise Edition (J2EE^TM) technology.

• Availability services. These services provide near-continuous availability and scalability for applications and web services.

The following table lists the preceding service categories and specifies the Java Enterprise System components that provide services for each category.

Table 1–1 Java Enterprise System Service Categories

Service Category	Java Enterprise System Components
Portal services	Portal Server, Portal Server Secure Remote Access, Access Manager, Directory Server, Application Server or Web Server
Communication and collaboration services	Messaging Server, Calendar Server, Instant Messaging, Access Manager, Directory Server, Application Server or Web Server
Network identity services	Access Manager, Directory Server, Web Server
Web and application services	Application Server, Message Queue, Web Server
Availability services	Sun Cluster, Sun Cluster Agents

For more information about Java Enterprise System services, components, and Java Enterprise System architectural concepts, refer to the Sun Java Enterprise System 5 Technical Overview.