Rewrite in Python

AUTHORS

-Aur?lien Calonne <aurel@nexedi.com>
-Yoshinori Okuji <yo@nexedi.com>

ChangeLog

-2005-07-01  Aurelien Calonne  <aurel@nexedi.com>
-
-	* src/master_node.c (h_beginTrans): 
-

INSTALL

-Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free Software
-Foundation, Inc.
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-==================
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-======================
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-

Makefile.am

-SUBDIRS = include lib master storage test doc client

README

-Nexedi Enterprise Objects
+This is the second prototype of NEO. The design is described in:
 
-  This implementation is based on the protocol version 2,
-  which is documented in doc/protocol.txt.
+    http://www.nexedi.org/workspaces/neo
 
-  NEO must be rewritten based on the protocol version 3.0,
-  which is being documented in doc/spec.stx. The specification
-  is being worked on, and requires more effort to finish.
+TODO
+
+    - Handling connection timeouts.
+
+    - Handling write timeouts.

autogen.sh

-#! /bin/sh
-
-set -x
-aclocal
-autoheader
-automake -a -c
-autoconf

client/Makefile.am

-SUBDIRS = NEO

client/NEO/Makefile.am

-PYTHON_PY_FILES = __init__.py config.py neostorage.py mq.py
-PYTHON_C_FILES = neoclient.c neoclient_wrap.c
-ZOPE_DATA_FILES = component.xml
-
-# XXX this should be configurable.
-NEO_DIR = /usr/lib/zope/lib/python/NEO
-
-EXTRA_DIST = $(PYTHON_PY_FILES) $(PYTHON_C_FILES) $(ZOPE_DATA_FILES)
-
-PYTHON_EXTENSIONS = neoclient$(PYTHON_SO)
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-
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-
-neoclient$(PYTHON_SO): $(neoclient_OBJ_FILES) ../../lib/libneo.a
-	$(PYTHON_LDSHARED) -o $@ $(neoclient_OBJ_FILES) -L../../lib -lneo
-
-neoclient_wrap.$(OBJEXT): neoclient_wrap.c
-	$(PYTHON_CCOMPILE) -c $< -o $@
-
-neoclient.$(OBJEXT): neoclient.c
-	$(PYTHON_CCOMPILE) -c $< -o $@
-
-install-data-local: $(PYTHON_EXTENSIONS) $(PYTHON_PY_FILES) $(ZOPE_DATA_FILES)
-	$(mkinstalldirs) $(DESTDIR)$(NEO_DIR)
-	for file in $?; do $(INSTALL_DATA) $$file $(DESTDIR)$(NEO_DIR); done
-
-uninstall-local:
-	for file in $(PYTHON_EXTENSIONS) $(PYTHON_PY_FILES) $(ZOPE_DATA_FILES); do \
-	  rm -f $(DESTDIR)$(NEO_DIR)/$$file; \
-	done

client/NEO/Makefile.in

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-
-# XXX this should be configurable.
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-
-EXTRA_DIST = $(PYTHON_PY_FILES) $(PYTHON_C_FILES) $(ZOPE_DATA_FILES)
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-neoclient$(PYTHON_SO): $(neoclient_OBJ_FILES) ../../lib/libneo.a
-	$(PYTHON_LDSHARED) -o $@ $(neoclient_OBJ_FILES) -L../../lib -lneo
-
-neoclient_wrap.$(OBJEXT): neoclient_wrap.c
-	$(PYTHON_CCOMPILE) -c $< -o $@
-
-neoclient.$(OBJEXT): neoclient.c
-	$(PYTHON_CCOMPILE) -c $< -o $@
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-install-data-local: $(PYTHON_EXTENSIONS) $(PYTHON_PY_FILES) $(ZOPE_DATA_FILES)
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client/NEO/component.xml

-<component prefix="NEO.config">
-  <sectiontype name="NEO" datatype=".neostorage"
-               implements="ZODB.storage">
-     <description>
-       A scalable storage for Zope
-     </description>
-     <key name="master" required="yes">
-      <description>
-       Give the ip of the master node
-      </description>
-    </key>
-  </sectiontype>
-</component>

client/NEO/config.py

-from ZODB.config import BaseConfig
-
-class neostorage(BaseConfig):
-
-  def open(self):
-    from neostorage import neostorage
-    return neostorage(master = self.config.master)
-
-                  

client/NEO/mq.py

-##############################################################################
-#
-# Copyright (c) 2005 Nexedi SARL and Contributors. All Rights Reserved.
-#                    Yoshinori Okuji <yo@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.
-#
-##############################################################################
-
-"""
-Multi-Queue Cache Algorithm.
-"""
-
-from math import log
-
-class Element:
-  """
-    This class defines an element of a FIFO buffer.
-  """
-  pass
-      
-class FIFO:
-  """
-    This class implements a FIFO buffer.
-  """
-  
-  def __init__(self):
-    self._head = None
-    self._tail = None
-    self._len = 0
-    
-  def __len__(self):
-    return self._len
-    
-  def append(self):
-    element = Element()
-    element.next = None
-    element.prev = self._tail
-    if self._tail is not None:
-      self._tail.next = element
-    self._tail = element
-    if self._head is None:
-      self._head = element
-    self._len += 1
-    return element
-
-  def head(self):
-    return self._head
-    
-  def tail(self):
-    return self._tail
-          
-  def shift(self):
-    element = self._head
-    if element is None:
-      return None
-    del self[element]
-    return element
-    
-  def __delitem__(self, element):
-    if element.next is None:
-      self._tail = element.prev