view flys-backend/contrib/shpimporter/floodmarks.py @ 5779:ebec12def170

Datacage: Add a pool of builders to make it multi threadable. XML DOM is not thread safe. Therefore the old implementation only allowed one thread to use the builder at a time. As the complexity of the configuration has increased over time this has become a bottleneck of the whole application because it took quiet some time to build a result. Furthermore the builder code path is visited very frequent. So many concurrent requests were piled up resulting in long waits for the users. To mitigate this problem a round robin pool of builders is used now. Each of the pooled builders has an independent copy of the XML template and can be run in parallel. The number of builders is determined by the system property 'flys.datacage.pool.size'. It defaults to 4.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 21 Apr 2013 12:48:09 +0200 (2013-04-21)
parents ed149d5d7fb7
children
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# -*- coding: utf-8 -*-
try:
    from osgeo import ogr
except ImportError:
    import ogr

from importer import Importer
import logging
import os
import re

TABLE_NAME="flood_marks"
PATH="Hydrologie/HW-Marken"
NAME="Floodmarks"

logger = logging.getLogger(NAME)

BUILDING_KINDS= {
        "sonstige" : 0,
        "brücken"  : 1,
        "wehre"    : 2,
        "pegel"    : 3,
        }

class Floodmark(Importer):
    fieldmap = {
            "^station$"       : "km",
            "^km$"            : "km",
            "^wsv-km$"        : "km",
            "^FlussKm$"       : "km",
            "^z$"             : "z",
            "^z\d*"           : "z", # z02, z1890, usw.
            "^m+NHN$"         : "z",
            "^Ort$"           : "location",
            "^Pegel$"         : "location",
        }

    def getPath(self, base):
        return "%s/%s" % (base, PATH)

    def getTablename(self):
        return TABLE_NAME

    def getName(self):
        return NAME

    def isGeometryValid(self, geomType):
        return geomType == ogr.wkbPoint

    def isShapeRelevant(self, name, path):
        return "hw-marken" in name.lower()

    def createNewFeature(self, featureDef, feat, **args):
        newFeat  = ogr.Feature(featureDef)
        geometry = feat.GetGeometryRef()
        geometry.SetCoordinateDimension(2)
        newFeat.SetGeometry(geometry)

        self.copyFields(feat, newFeat, self.fieldmap)

        newFeat.SetField("river_id", self.river_id)

        filename = os.path.basename(args['path'])

        # Try to extract the year from the filename
        match = re.search(r"([_\-])(\d\d\d\d)([_\-])", filename)
        if match:
            year = match.groups()[1]
            year = int(year)
            newFeat.SetField("year", year)
        else:
            logger.warn(u"Could not extract year from filename: %s " % filename)

        return newFeat

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