cache purge improvements, index path flusher

workers/purge_cache_order_worker.rb

@@ -0,0 +1,23 @@
+class PurgeCacheOrderWorker
+  include Sidekiq::Worker
+  sidekiq_options queue: :purgecacheorder, retry: 1000, backtrace: true, average_scheduled_poll_interval: 1
+
+  sidekiq_retry_in do |count|
+    return 10 if count < 10
+    180
+  end
+
+  RESOLVER = Dnsruby::Resolver.new
+
+  def perform(username, path)
+    if ENV['RACK_ENV'] == 'test'
+      proxy_ips = ['10.0.0.1', '10.0.0.2']
+    else
+      proxy_ips = RESOLVER.query($config['cache_purge_ips_uri']).answer.collect {|a| a.address.to_s}
+    end
+
+    proxy_ips.each do |proxy_ip|
+      PurgeCacheWorker.perform_async proxy_ip, username, path
+    end
+  end
+end