Pelletier Vincent
2006-12-06 14:07:33 UTC
Hi.
I just added a memcached tool.
This tool provides an interface to a memcached server.
It is disabled by default because it would ad a dependence on python-memcached
and we want it to fail loudly if python-memcached is not present and the tool
is needed.
Features :
- Presents memcached as a dictionary
- Allows multiple uses of the same memcached using one connection
- Reads are cached during the transaction : prevents multiple reads of the
same value from memcached
- Writes to memcached are queued until transaction ends : prevents duplicate
writes
Remember : Each time memcached is restarted, the content is lost.
Quick tutorial :
In all cases (part 1) :
- Install python-memcached (see links below)
- Install & start a mamcached server somewhere on your network (see links
below)
- touch Products/ERP5Type/USE_MEMCACHED_TOOL (otherwise the tool will be in
disabled mode)
If you're updating from an older site :
- Update your products to get the latest version
- Go to Zope Managment Interface on your portal object (most likely /erp5)
- Select 'ERP5Type Tool' in the 'add' menu
- Select 'ERP5 Memcached Tool' in the offered choices
- Click 'Add'
In all cases (part 2) :
- Go to portal_memcached management screens
- Setup tht ip:port of your memcached server
It's ready to use !
Quick sample script :
# Begin
memcached_dict = context.getPortalObject().portal_memcached.getMemcachedDict(key_prefix='my_first_test')
value = memcached_dict['some_key']
print value
if value is None:
value = 0
memcached_dict['some_key'] = value + 1
return printed
# End
The printed values should be None, then 1, then 2, ...
If you restart memcached, the count wil stall at None until python-memcached
reconnects to memcached.
Memcached : http://www.danga.com/memcached/
python-memcached : ftp://ftp.tummy.com/pub/python-memcached/
(linked from the "client API" page on memcached site)
I just added a memcached tool.
This tool provides an interface to a memcached server.
It is disabled by default because it would ad a dependence on python-memcached
and we want it to fail loudly if python-memcached is not present and the tool
is needed.
Features :
- Presents memcached as a dictionary
- Allows multiple uses of the same memcached using one connection
- Reads are cached during the transaction : prevents multiple reads of the
same value from memcached
- Writes to memcached are queued until transaction ends : prevents duplicate
writes
Remember : Each time memcached is restarted, the content is lost.
Quick tutorial :
In all cases (part 1) :
- Install python-memcached (see links below)
- Install & start a mamcached server somewhere on your network (see links
below)
- touch Products/ERP5Type/USE_MEMCACHED_TOOL (otherwise the tool will be in
disabled mode)
If you're updating from an older site :
- Update your products to get the latest version
- Go to Zope Managment Interface on your portal object (most likely /erp5)
- Select 'ERP5Type Tool' in the 'add' menu
- Select 'ERP5 Memcached Tool' in the offered choices
- Click 'Add'
In all cases (part 2) :
- Go to portal_memcached management screens
- Setup tht ip:port of your memcached server
It's ready to use !
Quick sample script :
# Begin
memcached_dict = context.getPortalObject().portal_memcached.getMemcachedDict(key_prefix='my_first_test')
value = memcached_dict['some_key']
print value
if value is None:
value = 0
memcached_dict['some_key'] = value + 1
return printed
# End
The printed values should be None, then 1, then 2, ...
If you restart memcached, the count wil stall at None until python-memcached
reconnects to memcached.
Memcached : http://www.danga.com/memcached/
python-memcached : ftp://ftp.tummy.com/pub/python-memcached/
(linked from the "client API" page on memcached site)
--
Vincent Pelletier
Vincent Pelletier