############################################################################## # # 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, MESSAGE_EXECUTED from Queue import Queue, VALID import transaction class RAMQueue(Queue): """ A simple RAM based queue """ def __init__(self): Queue.__init__(self) self.queue_dict = {} self.last_uid = 0 def getQueue(self, activity_tool_path): return self.queue_dict.setdefault(activity_tool_path, []) def finishQueueMessage(self, activity_tool_path, m): if m.is_registered: # XXX - Some lock is required on this section self.last_uid = self.last_uid + 1 m.uid = self.last_uid self.getQueue(activity_tool_path).append(m) def finishDeleteMessage(self, activity_tool_path, m): i = 0 queue = self.getQueue(activity_tool_path) for my_message in queue: if my_message.uid == m.uid: del queue[i] return i = i + 1 def dequeueMessage(self, activity_tool, processing_node): path = activity_tool.getPhysicalPath() for m in self.getQueue(path): if m.validate(self, activity_tool) is not VALID: self.deleteMessage(activity_tool, m) # Trash messages which are not validated (no error handling) transaction.commit() # Start a new transaction return 0 # Keep on ticking activity_tool.invoke(m) if m.getExecutionState() == MESSAGE_EXECUTED: self.deleteMessage(activity_tool, m) # Trash messages which are not validated (no error handling) transaction.commit() # Start a new transaction return 0 # Keep on ticking else: # Start a new transaction and keep on to next message transaction.commit() return 1 # Go to sleep def countMessage(self, activity_tool,path=None,method_id=None,**kw): tool_path = activity_tool.getPhysicalPath() count = 0 for m in self.getQueue(tool_path): add = 1 if path is not None: object_path = '/'.join(m.object_path) if object_path != path: add = 0 if method_id is not None: if m.method_id != method_id: add = 0 count += add return count def hasActivity(self, activity_tool, object, **kw): if object is not None: object_path = object.getPhysicalPath() else: object_path = None active_process = kw.get('active_process', None) path = activity_tool.getPhysicalPath() for m in self.getQueue(path): # Filter active process and path if defined if active_process is None or m.active_process == active_process: if object_path is None or m.object_path == object_path: return 1 return 0 def flush(self, activity_tool, object_path, invoke=0, method_id=None, **kw): # Parse each message in registered for m in activity_tool.getRegisteredMessageList(self): if object_path == m.object_path and (method_id is None or method_id == m.method_id): if m.validate(self, activity_tool) is not VALID: activity_tool.unregisterMessage(self, m) # Trash messages which are not validated (no error handling) else: if invoke: activity_tool.invoke(m) if m.getExecutionState() == MESSAGE_EXECUTED: activity_tool.unregisterMessage(self, m) else: activity_tool.unregisterMessage(self, m) # Parse each message in queue path = activity_tool.getPhysicalPath() for m in self.getQueue(path): if object_path == m.object_path and (method_id is None or method_id == m.method_id): if m.validate(self, activity_tool) is not VALID: self.deleteMessage(activity_tool, m) # Trash messages which are not validated (no error handling) else: if invoke: activity_tool.invoke(m) if m.getExecutionState() == MESSAGE_EXECUTED: self.deleteMessage(activity_tool, m) # Only delete if no error happens else: self.deleteMessage(activity_tool, m) def getMessageList(self, activity_tool, processing_node=None,**kw): new_queue = [] path = activity_tool.getPhysicalPath() for m in self.getQueue(path): m.processing_node = 1 m.priority = 0 new_queue.append(m) return new_queue registerActivity(RAMQueue)