This glossary supports the following titles: SOA: Principles of Service Design (ISBN: 01323 44823, Prentice Hall) Service-Oriented Architecture: Concepts, Technology, and Design (ISBN: 0131858580, Prentice Hall) Service-Oriented Architecture: A Field Guide to Integrating XML & Web Services (ISBN: 0131 428985, Prentice Hall) For more information about this book series, visit: www.soabooks.com stateful (primary state condition) A service is stateful when it is active and consuming additional memory via the temporary storage and processing of state (service activity-specific) data. It is important to note that it is the service capability being invoked and its associated functionality that determines whether a service becomes stateful and the extent of a service’s statefulness (the extent of memory the service consumes as a result of state-related processing). When stateful, a service will typically be processing one or more of three types of state data: • session data • context data • business data The term “stateful” represents a primary state condition, the other being stateless. These conditions are associated with the Service Statelessness design principle that advocates the minimization of the stateful condition by incorporating state deferral and delegation options into the service design. See also: - Service Statelessness - active (primary state) - context (state information type) - context data (context data type) - context rules (context data type) - passive (primary state) - session (state information type) - stateless (primary state condition)

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