Add Job class

lib/crono/job.rb

@@ -0,0 +1,19 @@
+module Crono
+  class Job
+    attr_accessor :performer
+    attr_accessor :period
+
+    def initialize(performer, period)
+      self.performer, self.period = performer, period
+    end
+
+    def next
+      period.next
+    end
+
+    def perform
+      Crono.logger.info "Perform #{performer}"
+      Thread.new { performer.new.perform }
+    end
+  end
+end