WS-RF WS-Notification

1
WS-RF WS-Notification

• Ben Clifford
• For NM-WG

2
WS-RF components

• WS-Resources
• WS-Resource Properties
• WS-Resource Lifetime
• WS-Notification (multiple specs now)
• WS-Renewable References
• WS-Service groups

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WS-Resources

• Standard way of representing state
• If you have a web service call that passes in a
  cookie / token / session-id to every call to
  represent some state, WS-Resources provide a
  standard way to do this.
• Some web services perform their own state
  management (for example, in Amazon, pass an item
  number or a basket ID to certain calls). WS-RF
  provides a standard way to do this.
• Use other WS-RF pieces to act on WS-Resources
• Maybe submitting a NM-WG Request schema request
  could create a new resource?

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WS-Resource Properties

• Standard way to expose WS-Resource state as XML
• OGSI ServiceData
• Schema depends on type of resource
• Standard querying operations
• Used in conjunction with WS-Notification specs,
  standard subscription mechanism
• Eg. Maybe could use NM-WG Response schema

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WS-Resource Lifetime

• Lifetime management of WS-Resources
• Leasing / soft-state
• Explicit destruction of state

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WS-Notification

• Recently split into 3 specs
• Notification/messaging
• With WS-Resource Properties spec, provides
  standard way to deliver changes in WS-RP values
• But not restricted to that can deliver other
  kinds of notification

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WS-Renewable References

• Builds on WS-Addressing
• A reference refers to a web service or a
  WS-Resource
• Mechanism for getting a new reference to the same
  WS-Resource if the old reference becomes stale.

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WS-Service Groups

• Mechanism for grouping WS-Resources (and plain
  web services)
• Use to build registries or represent any other
  collections of services
• Doesnt define meaning for grouping