The components used to support Java ES services components are grouped into the following categories:
The components in these categories are described in the sections that follow.
Availability components provide for near-continuous uptime for system service components and application components. The following Java ES availability components are described in this section:
A cluster is a set of loosely coupled computers (cluster nodes) that collectively provides a single client view of services, system resources, and data. Internally, the cluster uses redundant computers, interconnects, data storage, and network interfaces to provide high availability to cluster-based services and data. Sun Cluster software continuously monitors the health of member nodes and other cluster resources, and uses the internal redundancy to provide near-continuous access to these resources even when failure occurs.
The Java ES installer provides the Sun Cluster Core and the Sun Cluster Agents as separately installable components. Additional Sun Cluster agents are available on separate CDs.
Sun Java System High Availability Session Store (HADB) provides a data store that can be used to make application data available even in the case of failure. This capability is especially important for restoring state information associated with a client session. Without this capability, failure during a session requires that all operations be repeated when a the session is re-established.
The following Java ES components provide services that store session state information: Application Server, Access Manager, and Message Queue. However, Application Server is the only one of these components that can use HADB services to maintain session state during failure.
The Java ES installer provides HADB as a single installable component. However, a server and a client subcomponent are both required to provide HADB services.
Access components provide front-end access to system services, often from Internet locations outside an enterprise firewall. The following Java ES access components are described in this section:
Sun Java System Communications Express (Communications Express) provides an integrated web-based communications and collaboration client that provides end users with a web interface to calendar, email, and address book services. Communications Express consists of three client modules: Calendar, Address Book, and Mail. Configurable to provide access to either Messaging Server or Calendar Server or both, Communications Express works with either Sun Java System LDAP Schema, Version 1 (Schema 1) or Schema 2.
The Java ES installer provides Communications Express as a single installable component.
Sun Java System Web Proxy Server (Web Proxy Server) provides caching, filtering, and distribution of web content. Web Proxy Server is often used inside enterprise firewalls to reduce the number of requests to remote content servers and outside firewalls to provide a secure gateway for incoming internet requests.
The Java ES installer provides the Web Proxy Server as a single installable component.
Sun Java System Connector for Microsoft Outlook enables Outlook to be used as a desktop client with Sun Java Enterprise System. The connector is an Outlook plug-in that must be installed on the user desktop.
Connector for Microsoft Outlook queries Messaging Server for folder hierarchies and e-mail messages, then converts the information into Messaging API (MAPI) properties that Outlook can display. Similarly, Connector uses WCAP to query Calendar Server for events and tasks which are then converted into MAPI properties. With this model, Sun Java System Connector for Microsoft Outlook builds an end-user Outlook view from two separate information sources: mail from Messaging Server and calendar information from Calendar Server.
Sun Java System Connector for Microsoft Outlook is provided on the accessories CD, with its own installer.
Sun Java System Directory Proxy Server (Directory Proxy Server) is an essential component of any mission-critical directory service for e-commerce solutions. Directory Proxy Server is an LDAP application layer protocol gateway that offers enhanced directory access control, schema compatibility, and high availability using application layer load balancing and failover.
The Java ES installer provides Directory Proxy Server as a single installable component.
Sun Java System Portal Server Secure Remote Access (Portal Server Secure Remote Access) extends Portal Server by offering browser-based secure remote access to Portal Server content and services from any remote browser, eliminating the need for client software. Integration with Portal Server ensures that users receive secure access to the content and services that they have permission to access.
The Java ES installer provides Portal Server Secure Remote Access as a single installable component. If needed, the following Portal Server Secure Remote Access subcomponents can be installed separately:
Portal Server Secure Remote Access Core.
Gateway. Provides an interface and security barrier to a corporate intranet that allows remote access from outside the intranet. Gateway presents content securely from internal web servers and application servers through a single interface to a remote user.
Netlet Proxy. Enables users to securely run common TCP/IP services over the Internet and other non-secure networks. Netlet allows you to run applications such as telnet, SMTP, HTTP, and fixed-port applications.
Rewriter Proxy. Provides secure access to corporate intranet web pages from outside of the intranet by transforming web links and creating rule sets for handling intranet web pages.
Administrative components provide management functions, such as configuration and monitoring, for system services. The following Java ES administrative components are described in this section:
Sun Java System Administration Server (Administration Server) and Server Console together provide a graphical tool that lets you manage Directory Server, Directory Proxy Server, andMessaging Server. The Administration Server processes requests for servers installed in a server group under the same root directory, and then starts the programs required to fulfill the requests.
Server Console is a stand-alone Java application that works in conjunction with an instance of Directory Server and an instance of Administration Server on your network. Server Console acts as the front-end management application for Java ES software in your enterprise.
The Java ES installer provides Server Console and Administration Server together as a single installable component.
The Sun Java System Delegated Administrator is a command-line utility (commadmin) for provisioning users, groups, domains, and resources for Calendar Server, Messaging Server and other Java ES service providers.
Delegated Administrator is automatically installed when you choose to install Access Manager.