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routeserver.py
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routeserver.py
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from servable import Servable
from graphserver.graphdb import GraphDatabase
import cgi
from graphserver.core import State, WalkOptions, ContractionHierarchy, Combination
import time
import sys
import graphserver
from graphserver.util import TimeHelpers
from graphserver.ext.osm.osmdb import OSMDB
from graphserver.ext.osm.profiledb import ProfileDB
try:
import json
except ImportError:
import simplejson as json
import settings
from glineenc import encode_pairs
from profile import Profile
from shortcut_cache import get_ep_geom, get_encoded_ep_geom, ShortcutCache, get_ep_profile, get_full_route_narrative
def reincarnate_ch(basename):
chdowndb = GraphDatabase( basename+".down.gdb" )
chupdb = GraphDatabase( basename+".up.gdb" )
upgg = chupdb.incarnate()
downgg = chdowndb.incarnate()
return ContractionHierarchy(upgg, downgg)
class RouteServer(Servable):
def __init__(self, ch_basename, osmdb_filename, profiledb_filename):
graphdb = GraphDatabase( graphdb_filename )
self.osmdb = OSMDB( osmdb_filename )
self.profiledb = ProfileDB( profiledb_filename )
self.ch = reincarnate_ch( ch_basename )
self.shortcut_cache = ShortcutCache( ch_basename+".scc" )
def vertices(self):
return "\n".join( [vv.label for vv in self.graph.vertices] )
vertices.mime = "text/plain"
def path(self, lat1, lng1, lat2, lng2, transfer_penalty=0, walking_speed=1.0, hill_reluctance=20, narrative=True, jsoncallback=None):
t0 = time.time()
origin = "osm-%s"%self.osmdb.nearest_node( lat1, lng1 )[0]
dest = "osm-%s"%self.osmdb.nearest_node( lat2, lng2 )[0]
endpoint_find_time = time.time()-t0
print origin, dest
t0 = time.time()
wo = WalkOptions()
#wo.transfer_penalty=transfer_penalty
#wo.walking_speed=walking_speed
wo.walking_speed=4
wo.walking_overage = 0
wo.hill_reluctance = 20
wo.turn_penalty = 15
edgepayloads = self.ch.shortest_path( origin, dest, State(1,0), wo )
wo.destroy()
route_find_time = time.time()-t0
t0 = time.time()
names = []
geoms = []
profile = Profile()
total_dist = 0
total_elev = 0
if narrative:
names, total_dist = get_full_route_narrative( self.osmdb, edgepayloads )
for edgepayload in edgepayloads:
geom, profile_seg = self.shortcut_cache.get( edgepayload.external_id )
#geom = get_ep_geom( self.osmdb, edgepayload )
#profile_seg = get_ep_profile( self.profiledb, edgepayload )
geoms.extend( geom )
profile.add( profile_seg )
route_desc_time = time.time()-t0
ret = json.dumps( (names,
encode_pairs( [(lat, lon) for lon, lat in geoms] ),
profile.concat(300),
{ 'route_find_time':route_find_time,
'route_desc_time':route_desc_time,
'endpoint_find_time':endpoint_find_time,},
{ 'total_dist':total_dist,
'total_elev':total_elev}) )
if jsoncallback:
return "%s(%s)"%(jsoncallback,ret)
else:
return ret
"""
def path_raw(self, origin, dest, currtime):
wo = WalkOptions()
spt = self.graph.shortest_path_tree( origin, dest, State(1,currtime), wo )
wo.destroy()
vertices, edges = spt.path( dest )
ret = "\n".join([str(x) for x in vertices]) + "\n\n" + "\n".join([str(x) for x in edges])
spt.destroy()
return ret
"""
def bounds(self, jsoncallback=None):
ret = json.dumps( self.osmdb.bounds() )
if jsoncallback:
return "%s(%s)"%(jsoncallback,ret)
else:
return ret
import sys
if __name__ == '__main__':
usage = "python routeserver.py ch_basename osmdb_filename profiledb_filename"
if len(sys.argv) < 3:
print usage
exit()
graphdb_filename = sys.argv[1]
osmdb_filename = sys.argv[2]
profiledb_filename = sys.argv[3]
gc = RouteServer(graphdb_filename, osmdb_filename, profiledb_filename)
gc.run_test_server(settings.PORT)