Sha256: fc8b6a029ed73a4436c9bbe190d95793be26b298c7cc2e4b22f8ea9138428626
Contents?: true
Size: 1.85 KB
Versions: 13
Compression:
Stored size: 1.85 KB
Contents
class Cache < ActiveRecord::Base
attr_protected :site_id
cattr_accessor :perform_caching
before_save :set_site_id
class << self
def with(visitor_id, visitor_groups, kpath, *context)
return yield unless perform_caching
if cached = self.find(:first, :conditions => ["visitor_id = ? AND site_id = ? AND context = ?", visitor_id, visitor.site.id, context.join('.').hash.abs])
cached[:content]
else
content = yield
self.create(:visitor_id=>visitor_id, :visitor_groups=>".#{visitor_groups.join('.')}.", :kpath=>kpath,
:context=>context.join('.').hash.abs, :content=>content )
content
end
end
# We can provide a kpath selector for sweeping. If the kpath is in the cached scope, the cache is removed.
def sweep(hash)
if kpath = hash[:kpath]
klasses = []
kpath.split(//).each_index { |i| klasses << kpath[0..i].inspect }
kpath_selector = " AND kpath IN (#{klasses.join(',')})"
else
kpath_selector = ""
end
if hash[:visitor_id]
self.connection.execute "DELETE FROM #{self.table_name} WHERE visitor_id = '#{hash[:visitor_id]}'" + kpath_selector
end
if hash[:visitor_groups]
hash[:visitor_groups].each do |g|
self.connection.execute "DELETE FROM #{self.table_name} WHERE visitor_groups LIKE '%.#{g}.%'" + kpath_selector
end
end
if hash[:context]
context = [hash[:context]].flatten.join('.').hash.abs
self.connection.execute "DELETE FROM #{self.table_name} WHERE context = '#{context}'" + kpath_selector
end
if hash[:older_than]
self.connection.execute "DELETE FROM #{self.table_name} WHERE updated_at < '#{hash[:older_than]}'" + kpath_selector
end
end
end
private
def set_site_id
self[:site_id] = visitor.site[:id]
end
end
Version data entries
13 entries across 13 versions & 1 rubygems