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2015-03-24

ArcGIS Server Object Interceptors

ArcGIS SOI это новая фишка для ArcGIS Server, прослойка, позволяющая вмешиваться в запросы/ответы сервера.

They have the same API as Server Object Extensions, and are intended to extend an ArcGIS Server with custom capabilities. An SOI intercepts REST and/or SOAP calls on a MapServer before and/or after it executes the operation on an SOE or SO. Think servlet filters


Mansour сделал showcase с использованием SOI и BigData (MemSQL), для отображения на веб-карте маршрутов такси

The good folks at MemSQL bootstrapped a set of AWS instances with their “new” engine and loaded the now-very-famous New York City taxis trips data. This (very very small) set consists of about 170 million records with geospatial and temporal information such as pickup and drop off locations and times. Each trip has additional attributes such as travel times, distances and number of passengers. It was up to me now to query and display dynamically this information in a standard WebMap on every map pan and zoom. What do I mean by “standard” here, is that an out-of-the-box WebMap should be able to interact with this MemSQL database without being augmented with a new layer type or any other functionality. Thus the usage of an SOI. It will intercept the call to an export image operation with a map extent as an argument in a “stand-in” MapService and will execute a spatial MemSQL call on the AWS instances. The result set is drawn on an off-screen PNG image and is sent back to the requesting WebMap for display as a layer on a map







original post http://vasnake.blogspot.com/2015/03/arcgis-server-object-interceptors.html

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