Execute multiple Geoprocessing Tools Async in SOE

Question

Hi, I`m currently working on a more complex SOE process that runs on our latest ArcGIS Server version 10.6.1 much slower then ever before. The process includes several Raster Geoprocessing Functions which are time consuming and currently processed synchronously without 64 bit background processing. I would really like to migrate this to an asynchronous background process but I can't figure out how to bring this together. Async/await doesn't seem to work with the common SOE project layout. This is the major logic: RestOperation doMyJob = new RestOperation("doMyJob", new string[] { "param1", "param2", "param3", "param4", "param5", "param6", "param7", "param8" }, new string[] { "json" }, doMyJobOperationHandler);‍ private byte[] doMyJobOperationHandler(NameValueCollection boundVariables, JsonObject operationInput, string outputFormat, string requestProperties, out string responseProperties) { ... do a lot of stuff here return getCutFillAreas(p_strDatasetName, p_Polygon, b_dBaseZ, p_dZFactor, p_bCreateFC, p_strConstantRasterPath, p_strCutFillRasterPath, p_strClippedRasterPath); }‍‍‍‍‍‍‍‍‍‍‍ private byte[] getCutFillAreas(string paramA, IPolygon4 polygon, double z, double zFactor, bool createFC, string constRasterPath, string cutFillRasterPath, string clippedRasterPath) { JsonObject resultJsonObject = new JsonObject(); ...do a lot of stuff here executeClipTool((IRaster) iGeoDataset, clippedRasterPath, clippingEnv) ...continue here after clipping is done executeAnotherGeoprocessingTool(); ...continue return Encoding.UTF8.GetBytes(someJsonObject.ToJson()); } private void executeClipTool(IRaster inRaster, string outRasterPath, IEnvelope rectangle) { Geoprocessor GP = new Geoprocessor(); Clip l_clipTool = new Clip(); l_clipTool.in_raster = inRaster; l_clipTool.out_raster = outRasterPath; l_clipTool.rectangle = Math.Round(rectangle.XMin, 0) + ", " + Math.Round(p_rectangle.YMin, 0) + ", " + Math.Round(p_rectangle.XMax, 0) + ", " + Math.Round(p_rectangle.YMax, 0) executeGeoprocessingTool(GP, l_clipTool, null); }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ This is very simplified but it shows what I want to do. Basically I execute the tools synchronously and access results afterwards through file access. Now I want to have my main function getCutFillAreas to run executeClipTool() and other functions with Geoprocessor as asynchronous Tasks. I tried var result = executeClipToolAsync((IRaster) iGeoDataset, clippedRasterPath, clippingEnv).Result with a Task approach Task<bool> clippingTask = Task.Factory.StartNew(() => { return true; } return await clippingTask;‍‍‍‍‍ but then I get Task error. Any help would be very appreciated!

RichardReinicke · Answer

Thank you Domenico,

interesting article, I'tll keep this in mind for future but it turned out that the low SOE / Geoprocessing tool performance was related to changed data sources.

We now totally changed our raster data sources to mosaic datasets and Image Services and therefore redesign to Image Service native functionality and ImageServer SOEs.

nicogis · Answer

Arcobjects are STA com so with TPL is only waste of time . You could try with a task scheduler ( https://devblogs.microsoft.com/pfxteam/parallelextensionsextras-tour-5-stataskscheduler/  )