Initial import

git-svn-id: https://svn.erp5.org/repos/neo/trunk@1 71dcc9de-d417-0410-9af5-da40c76e7ee4

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.
+
+   This file is free documentation; the Free Software Foundation gives
+unlimited permission to copy, distribute and modify it.
+
+Basic Installation
+==================
+
+   These are generic installation instructions.
+
+   The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation.  It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions.  Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, and a
+file `config.log' containing compiler output (useful mainly for
+debugging `configure').
+
+   It can also use an optional file (typically called `config.cache'
+and enabled with `--cache-file=config.cache' or simply `-C') that saves
+the results of its tests to speed up reconfiguring.  (Caching is
+disabled by default to prevent problems with accidental use of stale
+cache files.)
+
+   If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release.  If you are using the cache, and at
+some point `config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+   The file `configure.ac' (or `configure.in') is used to create
+`configure' by a program called `autoconf'.  You only need
+`configure.ac' if you want to change it or regenerate `configure' using
+a newer version of `autoconf'.
+
+The simplest way to compile this package is:
+
+  1. `cd' to the directory containing the package's source code and type
+     `./configure' to configure the package for your system.  If you're
+     using `csh' on an old version of System V, you might need to type
+     `sh ./configure' instead to prevent `csh' from trying to execute
+     `configure' itself.
+
+     Running `configure' takes awhile.  While running, it prints some
+     messages telling which features it is checking for.
+
+  2. Type `make' to compile the package.
+
+  3. Optionally, type `make check' to run any self-tests that come with
+     the package.
+
+  4. Type `make install' to install the programs and any data files and
+     documentation.
+
+  5. You can remove the program binaries and object files from the
+     source code directory by typing `make clean'.  To also remove the
+     files that `configure' created (so you can compile the package for
+     a different kind of computer), type `make distclean'.  There is
+     also a `make maintainer-clean' target, but that is intended mainly
+     for the package's developers.  If you use it, you may have to get
+     all sorts of other programs in order to regenerate files that came
+     with the distribution.
+
+Compilers and Options
+=====================
+
+   Some systems require unusual options for compilation or linking that
+the `configure' script does not know about.  Run `./configure --help'
+for details on some of the pertinent environment variables.
+
+   You can give `configure' initial values for configuration parameters
+by setting variables in the command line or in the environment.  Here
+is an example:
+
+     ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix
+
+   *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+   You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory.  To do this, you must use a version of `make' that
+supports the `VPATH' variable, such as GNU `make'.  `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script.  `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'.
+
+   If you have to use a `make' that does not support the `VPATH'
+variable, you have to compile the package for one architecture at a
+time in the source code directory.  After you have installed the
+package for one architecture, use `make distclean' before reconfiguring
+for another architecture.
+
+Installation Names
+==================
+
+   By default, `make install' will install the package's files in
+`/usr/local/bin', `/usr/local/man', etc.  You can specify an
+installation prefix other than `/usr/local' by giving `configure' the
+option `--prefix=PATH'.
+
+   You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files.  If you
+give `configure' the option `--exec-prefix=PATH', the package will use
+PATH as the prefix for installing programs and libraries.
+Documentation and other data files will still use the regular prefix.
+
+   In addition, if you use an unusual directory layout you can give
+options like `--bindir=PATH' to specify different values for particular
+kinds of files.  Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them.
+
+   If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+Optional Features
+=================
+
+   Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System).  The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+   For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+Specifying the System Type
+==========================
+
+   There may be some features `configure' cannot figure out
+automatically, but needs to determine by the type of machine the package
+will run on.  Usually, assuming the package is built to be run on the
+_same_ architectures, `configure' can figure that out, but if it prints
+a message saying it cannot guess the machine type, give it the
+`--build=TYPE' option.  TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name which has the form:
+
+     CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+     OS KERNEL-OS
+
+   See the file `config.sub' for the possible values of each field.  If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+   If you are _building_ compiler tools for cross-compiling, you should
+use the `--target=TYPE' option to select the type of system they will
+produce code for.
+
+   If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with `--host=TYPE'.
+
+Sharing Defaults
+================
+
+   If you want to set default values for `configure' scripts to share,
+you can create a site shell script called `config.site' that gives
+default values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists.  Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+   Variables not defined in a site shell script can be set in the
+environment passed to `configure'.  However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost.  In order to avoid this problem, you should set
+them in the `configure' command line, using `VAR=value'.  For example:
+
+     ./configure CC=/usr/local2/bin/gcc
+
+will cause the specified gcc to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+`configure' Invocation
+======================
+
+   `configure' recognizes the following options to control how it
+operates.
+
+`--help'
+`-h'
+     Print a summary of the options to `configure', and exit.
+
+`--version'
+`-V'
+     Print the version of Autoconf used to generate the `configure'
+     script, and exit.
+
+`--cache-file=FILE'
+     Enable the cache: use and save the results of the tests in FILE,
+     traditionally `config.cache'.  FILE defaults to `/dev/null' to
+     disable caching.
+
+`--config-cache'
+`-C'
+     Alias for `--cache-file=config.cache'.
+
+`--quiet'
+`--silent'
+`-q'
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to `/dev/null' (any error
+     messages will still be shown).
+
+`--srcdir=DIR'
+     Look for the package's source code in directory DIR.  Usually
+     `configure' can determine that directory automatically.
+
+`configure' also accepts some other, not widely useful, options.  Run
+`configure --help' for more details.
+

Makefile.am

+SUBDIRS = include lib master storage test doc client

README

+Nexedi Enterprise Objects

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)
+neoclient_OBJ_FILES = neoclient_wrap.$(OBJEXT) neoclient.$(OBJEXT)
+
+BUILT_SOURCES = $(PYTHON_EXTENSIONS)
+CLEANFILES = $(PYTHON_EXTENSIONS) $(neoclient_OBJ_FILES)
+
+PYTHON_CCOMPILE = $(PYTHON_CC) $(PYTHON_CCSHARED) $(PYTHON_BASECFLAGS) \
+	$(PYTHON_OPT) -Wall -W -I$(PYTHON_INCLUDE) -I$(top_srcdir)/include
+
+neoclient$(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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+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)
+neoclient_OBJ_FILES = neoclient_wrap.$(OBJEXT) neoclient.$(OBJEXT)
+
+BUILT_SOURCES = $(PYTHON_EXTENSIONS)
+CLEANFILES = $(PYTHON_EXTENSIONS) $(neoclient_OBJ_FILES)
+
+PYTHON_CCOMPILE = $(PYTHON_CC) $(PYTHON_CCSHARED) $(PYTHON_BASECFLAGS) \
+	$(PYTHON_OPT) -Wall -W -I$(PYTHON_INCLUDE) -I$(top_srcdir)/include
+
+subdir = client/NEO
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+
+neoclient$(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
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:

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
+    else:
+      element.next.prev = element.prev
+      
+    if element.prev is None:
+      self._head = element.next
+    else:
+      element.prev.next = element.next
+      
+    self._len -= 1      
+    
+class Data:
+  """
+    Data for each element in a FIFO buffer.
+  """
+  pass
+      
+class MQ:
+  """
+    This class manages cached data by a variant of Multi-Queue.