X-Git-Url: https://git.openstreetmap.org./chef.git/blobdiff_plain/d8fc1ec5f984b7ab6a7886e054c9dd272d3678b1..58368b10fb37cfcd56738324f90942a8fd8e3793:/cookbooks/tile/files/default/ruby/expire.rb?ds=sidebyside diff --git a/cookbooks/tile/files/default/ruby/expire.rb b/cookbooks/tile/files/default/ruby/expire.rb index 917b75747..3d693ad5b 100755 --- a/cookbooks/tile/files/default/ruby/expire.rb +++ b/cookbooks/tile/files/default/ruby/expire.rb @@ -1,73 +1,68 @@ #!/usr/bin/ruby -require 'rubygems' -require 'proj4' -require 'xml/libxml' -require 'set' -require 'pg' -require 'time' +require "rubygems" +require "proj4" +require "xml/libxml" +require "set" +require "time" module Expire # projection object to go from latlon -> spherical mercator - PROJ = Proj4::Projection.new(["+proj=merc", "+a=6378137", "+b=6378137", + PROJ = Proj4::Projection.new(["+proj=merc", "+a=6378137", "+b=6378137", "+lat_ts=0.0", "+lon_0=0.0", "+x_0=0.0", - "+y_0=0", "+k=1.0", "+units=m", + "+y_0=0", "+k=1.0", "+units=m", "+nadgrids=@null", "+no_defs +over"]) - + # width/height of the spherical mercator projection - SIZE=40075016.6855784 + SIZE = 40075016.6855784 # the size of the meta tile blocks METATILE = 8 # the directory root for meta tiles - HASH_ROOT = "/tiles/default/" - # database parameters - DBNAME="gis" - DBHOST="" - #DBPORT=5432 - DBPORT=5432 - DBTABLE="planet_osm_nodes" - + HASH_ROOT = "/tiles/default/".freeze + # node cache file + NODE_CACHE_FILE = "/store/database/nodes".freeze + # turns a spherical mercator coord into a tile coord - def Expire.tile_from_merc(point, zoom) + def self.tile_from_merc(point, zoom) # renormalise into unit space [0,1] point.x = 0.5 + point.x / SIZE point.y = 0.5 - point.y / SIZE # transform into tile space - point.x = point.x * 2 ** zoom - point.y = point.y * 2 ** zoom + point.x = point.x * 2**zoom + point.y = point.y * 2**zoom # chop of the fractional parts [point.x.to_int, point.y.to_int, zoom] end - + # turns a latlon -> tile x,y given a zoom level - def Expire.tile_from_latlon(latlon, zoom) + def self.tile_from_latlon(latlon, zoom) # first convert to spherical mercator point = PROJ.forward(latlon) tile_from_merc(point, zoom) end - + # this must match the definition of xyz_to_meta in mod_tile - def Expire.xyz_to_meta(x, y, z) + def self.xyz_to_meta(x, y, z) # mask off the final few bits x &= ~(METATILE - 1) y &= ~(METATILE - 1) # generate the path - hash_path = (0..4).collect { |i| - (((x >> 4*i) & 0xf) << 4) | ((y >> 4*i) & 0xf) - }.reverse.join('/') - z.to_s + '/' + hash_path + ".meta" + hash_path = (0..4).collect do |i| + (((x >> 4 * i) & 0xf) << 4) | ((y >> 4 * i) & 0xf) + end.reverse.join("/") + z.to_s + "/" + hash_path + ".meta" end - + # time to reset to, some very stupidly early time, before OSM started EXPIRY_TIME = Time.parse("2000-01-01 00:00:00") - # expire the meta tile by setting the modified time back - def Expire.expire_meta(meta) + # expire the meta tile by setting the modified time back + def self.expire_meta(meta) puts "Expiring #{meta}" File.utime(EXPIRY_TIME, EXPIRY_TIME, meta) end - - def Expire.expire(change_file, min_zoom, max_zoom, tile_dirs) + + def self.expire(change_file, min_zoom, max_zoom, tile_dirs) do_expire(change_file, min_zoom, max_zoom) do |set| new_set = Set.new meta_set = Set.new @@ -76,17 +71,17 @@ module Expire # so that we don't expire things multiple times set.each do |xy| # this has to match the routine in mod_tile - meta = xyz_to_meta(HASH_ROOT, xy[0], xy[1], xy[2]) + meta = xyz_to_meta(xy[0], xy[1], xy[2]) # check each style working out what needs expiring tile_dirs.each do |tile_dir| meta_set.add(tile_dir + "/" + meta) if File.exist?(tile_dir + "/" + meta) end - + # add the parent into the set for the next round new_set.add([xy[0] / 2, xy[1] / 2, xy[2] - 1]) end - + # expire all meta tiles meta_set.each do |meta| expire_meta(meta) @@ -97,65 +92,100 @@ module Expire end end - def Expire.do_expire(change_file, min_zoom, max_zoom, &block) + def self.do_expire(change_file, min_zoom, max_zoom, &_) # read in the osm change file doc = XML::Document.file(change_file) - + # hash map to contain all the nodes - nodes = Hash.new - + nodes = {} + # we put all the nodes into the hash, as it doesn't matter whether the node was # added, deleted or modified - the tile will need updating anyway. - doc.find('//node').each do |node| - lat = node['lat'].to_f - if lat < -85 - lat = -85 - end - if lat > 85 - lat = 85 - end - point = Proj4::Point.new(Math::PI * node['lon'].to_f / 180, + doc.find("//node").each do |node| + lat = node["lat"].to_f + lat = -85 if lat < -85 + lat = 85 if lat > 85 + point = Proj4::Point.new(Math::PI * node["lon"].to_f / 180, Math::PI * lat / 180) - nodes[node['id'].to_i] = tile_from_latlon(point, max_zoom) + nodes[node["id"].to_i] = tile_from_latlon(point, max_zoom) end - + # now we look for all the ways that have changed and put all of their nodes into # the hash too. this will add too many nodes, as it is possible a long way will be # changed at only a portion of its length. however, due to the non-local way that # mapnik does text placement, it may stil not be enough. # - # also, we miss cases where nodes are deleted from ways where that node is not + # also, we miss cases where nodes are deleted from ways where that node is not # itself deleted and the coverage of the point set isn't enough to encompass the # change. - conn = PG::Connection.new(:host => DBHOST, :port => DBPORT, :dbname => DBNAME) - doc.find('//way/nd').each do |node| - node_id = node['ref'].to_i - unless nodes.include? node_id - # this is a node referenced but not added, modified or deleted, so it should - # still be in the postgis DB. - res = conn.query("select lon, lat from #{DBTABLE} where id=#{node_id};") - - # loop over results, adding tiles to the change set - res.each do |row| - point = Proj4::Point.new(row[0].to_f / 100.0, row[1].to_f / 100.0) - nodes[node_id] = tile_from_merc(point, max_zoom) - end + node_cache = NodeCache.new(NODE_CACHE_FILE) + doc.find("//way/nd").each do |node| + node_id = node["ref"].to_i - # Discard results - res.clear + next if nodes.include? node_id + + # this is a node referenced but not added, modified or deleted, so it should + # still be in the node cache. + if (entry = node_cache[node_id]) + point = Proj4::Point.new(entry.lon, entry.lat) + nodes[node_id] = tile_from_merc(point, max_zoom) end end - - # create a set of all the tiles at the maximum zoom level which are touched by + node_cache.close + + # create a set of all the tiles at the maximum zoom level which are touched by # any of the nodes we've collected. we'll create the tiles at other zoom levels # by a simple recursion. set = Set.new nodes.values - + # expire tiles and shrink to the set of parents - (max_zoom).downto(min_zoom) do |z| + max_zoom.downto(min_zoom) do |_| # allow the block to work on the set, returning the set at the next # zoom level set = yield set end end + + # wrapper to access the osm2pgsql node cache + class NodeCache + # node cache entry + class Node + attr_reader :lon, :lat + + def initialize(lon, lat) + @lat = lat.to_f / 100.0 + @lon = lon.to_f / 100.0 + end + end + + # open the cache + def initialize(filename) + @cache = File.new(filename, "r") + + throw "Unexpected format" unless @cache.sysread(4).unpack("l").first == 1 + throw "Unexpected ID size" unless @cache.sysread(4).unpack("l").first == 8 + + @max_id = @cache.sysread(8).unpack("q").first + end + + # close the cache + def close + @cache.close + end + + # lookup a node + def [](id) + if id <= @max_id + offset = 16 + id * 8 + + @cache.sysseek(offset) + + lon, lat = @cache.sysread(8).unpack("ll") + + node = Node.new(lon, lat) if lon != -2147483648 && lat != -2147483648 + end + + node + end + end end