Microsoft SQL Server 2008 R2 810-08234 Benutzerhandbuch
Produktcode
810-08234
148
CHAPTER 8
Complex Event Processing with StreamInsight
Pagers and
monitoring devices
Input Adapters
Data feeds
Event stores
and databases
Web servers
Devices
and sensors
Event
Event
Event
Event
CEP Engine
Standing Queries
Event
Event
Event
Event
Event
Output Adapters
CEP Application
at Run Time
Static
reference data
Event Sources
Event stores
and databases
KPI dashboards
and SharePoint UI
Event Targets
FIGURE 8-1
StreamInsight architecture
Input Adapters
The input adapters translate the incoming events into the event format that the CEP engine
requires . You can create a typed adapter if the source produces a single event type only, but
you must create an untyped adapter when the payload format differs across events or is un-
known in advance. In the case of the typed adapter, the payload format is defined in advance
with a static number of fields and data types when you implement the adapter. By contrast,
an untyped adapter receives the payload format only when the adapter binds to the query (as
part of a configuration specification). In the latter case, the number of fields and data types
can vary with each query instantiation .
requires . You can create a typed adapter if the source produces a single event type only, but
you must create an untyped adapter when the payload format differs across events or is un-
known in advance. In the case of the typed adapter, the payload format is defined in advance
with a static number of fields and data types when you implement the adapter. By contrast,
an untyped adapter receives the payload format only when the adapter binds to the query (as
part of a configuration specification). In the latter case, the number of fields and data types
can vary with each query instantiation .