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Merge pull request #648 from bhollis/threading

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Make Sitemap::Store more thread-safe.
This commit is contained in:
Thomas Reynolds 2012-10-22 22:23:04 -07:00
commit 0ab6d03845
1 changed files with 41 additions and 26 deletions
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67
middleman-core/lib/middleman-core/sitemap/store.rb
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@ -1,5 +1,6 @@
# Used for merging results of metadata callbacks
require "active_support/core_ext/hash/deep_merge"
require 'monitor'
module Middleman
@ -25,6 +26,8 @@ module Middleman
@_cached_metadata = {}
@resource_list_manipulators = []
@needs_sitemap_rebuild = true
@lock = Monitor.new
reset_lookup_cache!
# Register classes which can manipulate the main site map list
@ -48,36 +51,44 @@ module Middleman
# Rebuild the list of resources from scratch, using registed manipulators
# @return [void]
def rebuild_resource_list!(reason=nil)
@needs_sitemap_rebuild = true
@lock.synchronize do
@needs_sitemap_rebuild = true
end
end
# Find a resource given its original path
# @param [String] request_path The original path of a resource.
# @return [Middleman::Sitemap::Resource]
def find_resource_by_path(request_path)
request_path = ::Middleman::Util.normalize_path(request_path)
ensure_resource_list_updated!
@_lookup_by_path[request_path]
@lock.synchronize do
request_path = ::Middleman::Util.normalize_path(request_path)
ensure_resource_list_updated!
@_lookup_by_path[request_path]
end
end
# Find a resource given its destination path
# @param [String] request_path The destination (output) path of a resource.
# @return [Middleman::Sitemap::Resource]
def find_resource_by_destination_path(request_path)
request_path = ::Middleman::Util.normalize_path(request_path)
ensure_resource_list_updated!
@_lookup_by_destination_path[request_path]
@lock.synchronize do
request_path = ::Middleman::Util.normalize_path(request_path)
ensure_resource_list_updated!
@_lookup_by_destination_path[request_path]
end
end
# Get the array of all resources
# @param [Boolean] include_ignored Whether to include ignored resources
# @return [Array<Middleman::Sitemap::Resource>]
def resources(include_ignored=false)
ensure_resource_list_updated!
if include_ignored
@resources
else
@resources.reject(&:ignored?)
@lock.synchronize do
ensure_resource_list_updated!
if include_ignored
@resources
else
@resources.reject(&:ignored?)
end
end
end
@ -201,30 +212,34 @@ module Middleman
# rebuild_resource_list! since the last time it was run. This is
# very expensive!
def ensure_resource_list_updated!
return unless @needs_sitemap_rebuild
@needs_sitemap_rebuild = false
@lock.synchronize do
return unless @needs_sitemap_rebuild
@needs_sitemap_rebuild = false
@app.logger.debug "== Rebuilding resource list"
@app.logger.debug "== Rebuilding resource list"
@resources = @resource_list_manipulators.inject([]) do |result, (_, inst)|
newres = inst.manipulate_resource_list(result)
@resources = @resource_list_manipulators.inject([]) do |result, (_, inst)|
newres = inst.manipulate_resource_list(result)
# Reset lookup cache
reset_lookup_cache!
newres.each do |resource|
@_lookup_by_path[resource.path] = resource
@_lookup_by_destination_path[resource.destination_path] = resource
# Reset lookup cache
reset_lookup_cache!
newres.each do |resource|
@_lookup_by_path[resource.path] = resource
@_lookup_by_destination_path[resource.destination_path] = resource
end
newres
end
newres
end
end
private
def reset_lookup_cache!
@_lookup_by_path = {}
@_lookup_by_destination_path = {}
@lock.synchronize {
@_lookup_by_path = {}
@_lookup_by_destination_path = {}
}
end
end
end