############################################################################## # # Copyright (c) 2002 Nexedi SARL and Contributors. All Rights Reserved. # Jean-Paul Smets-Solanes <jp@nexedi.com> # # WARNING: This program as such is intended to be used by professional # programmers who take the whole responsability of assessing all potential # consequences resulting from its eventual inadequacies and bugs # End users who are looking for a ready-to-use solution with commercial # garantees and support are strongly adviced to contract a Free Software # Service Company # # This program is Free Software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # ############################################################################## from Products.CMFActivity.ActivityTool import registerActivity from Queue import Queue class RAMQueue(Queue): """ A simple RAM based queue """ def __init__(self): Queue.__init__(self) self.queue = [] def queueMessage(self, activity_tool, m): self.queue.append(m) def dequeueMessage(self, activity_tool, processing_node): if len(self.queue) is 0: return 1 # Go to sleep m = self.queue[0] activity_tool.invoke(m) del self.queue[0] return 0 # Keep on ticking def hasActivity(self, object, method_id=None, **kw): object_path = object.getPhysicalPath() for m in self.queue: if m.object_path == object_path: return 1 return 0 def flush(self, activity_tool, object_path, **kw): new_queue = [] for m in self.queue: if m.object_path == object_path: activity_tool.invoke(m) del self.dict[key] else: new_queue.append(m) self.queue = new_queue def getMessageList(self, activity_tool, processing_node=None): return self.queue registerActivity(RAMQueue)