Java ES Service Quality Components

Several Java ES components are used principally to enhance the quality of services provided by system service components or distributed application components. These software components are often used in conjunction with hardware components such as load balancers and firewalls.

The Java ES service quality components, introduced in Service Quality Components, are summarized as follows:

• Availability components. Provide near-continuous uptime of a deployed solution.

• Access components. Provide secure Internet access to system services, and often provide a routing function as well.

• Monitoring components. Provide real-time information about Java ES components.

The following table lists the most important Java ES service quality components from an architectural perspective with the system qualities they impact most.

Table 2–3 Service Quality Components and the System Qualities Impacted

Component	System Qualities Impacted
High Availability Session Store	Availability
Monitoring Console	Serviceability
Portal Server Secure Remote Access	Security  Scalability
Sun Cluster	Availability  Scalability
Sun Cluster Geographic Edition	Availability  Scalability
Web Proxy Server	Security  Performance  Scalability