/usr/share/pyshared/imposm/parser/pbf/multiproc.py is in python-imposm-parser 1.0.3-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 | # Copyright 2011 Omniscale GmbH & Co. KG
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import multiprocessing
from imposm.parser.pbf.parser import PBFFile, PBFParser
from imposm.parser.util import setproctitle
class PBFParserProcess(PBFParser, multiprocessing.Process):
def __init__(self, pos_queue, *args, **kw):
self.pos_queue = pos_queue
PBFParser.__init__(self, *args, **kw)
multiprocessing.Process.__init__(self)
def run(self):
setproctitle('imposm pbf parser')
while True:
pos = self.pos_queue.get()
if pos is None:
self.pos_queue.task_done()
break
self.parse(pos['filename'], offset=pos['blob_pos'],
size=pos['blob_size'])
self.pos_queue.task_done()
class PBFMultiProcParser(object):
nodes_tag_filter = None
ways_tag_filter = None
relations_tag_filter = None
def __init__(self, pool_size, nodes_queue=None, ways_queue=None,
relations_queue=None, coords_queue=None, marshal_elem_data=False):
self.pool_size = pool_size
self.nodes_callback = nodes_queue.put if nodes_queue else None
self.ways_callback = ways_queue.put if ways_queue else None
self.relations_callback = relations_queue.put if relations_queue else None
self.coords_callback = coords_queue.put if coords_queue else None
self.marshal = marshal_elem_data
def parse(self, filename):
pos_queue = multiprocessing.JoinableQueue(32)
pool = []
for _ in xrange(self.pool_size):
proc = PBFParserProcess(pos_queue, nodes_callback=self.nodes_callback,
coords_callback=self.coords_callback, ways_callback=self.ways_callback,
relations_callback=self.relations_callback,
nodes_tag_filter=self.nodes_tag_filter,
ways_tag_filter=self.ways_tag_filter,
relations_tag_filter=self.relations_tag_filter,
marshal=self.marshal
)
pool.append(proc)
proc.start()
reader = PBFFile(filename)
for pos in reader.blob_offsets():
pos_queue.put(pos)
pos_queue.join()
for proc in pool:
pos_queue.put(None)
for proc in pool:
proc.join()
if __name__ == '__main__':
import sys
def count_proc(type, queue):
def count():
count = 0
while True:
nodes = queue.get()
if nodes is None:
queue.task_done()
break
count += len(nodes)
queue.task_done()
print type, count
return count
nodes_queue = multiprocessing.JoinableQueue(128)
ways_queue = multiprocessing.JoinableQueue(128)
relations_queue = multiprocessing.JoinableQueue(128)
procs = [
multiprocessing.Process(target=count_proc('nodes', nodes_queue)),
multiprocessing.Process(target=count_proc('ways', ways_queue)),
multiprocessing.Process(target=count_proc('relations', relations_queue))
]
for proc in procs:
proc.start()
parser = PBFMultiProcParser(2, nodes_queue=nodes_queue,
ways_queue=ways_queue, relations_queue=relations_queue)
parser.parse(sys.argv[1])
nodes_queue.put(None)
ways_queue.put(None)
relations_queue.put(None)
for proc in procs:
proc.join()
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