jumpscaleapi

• j.db.cache
  • Methods
    • def getRCache
    • def getRWCache

j.db.cache

• /opt/jumpscale7/lib/JumpScale/baselib/lrucache/LRUCacheFactory.py

Methods

def getRCache

arguments

• nritems

comments

Least-Recently-Used (LRU) cache.
Written by http://evan.prodromou.name/Software/Python/LRUCache

Instances of this class provide a least-recently-used (LRU) cache. They
emulate a Python mapping type. You can use an LRU cache more or less like
a Python dictionary, with the exception that objects you put into the
cache may be discarded before you take them out.

Some example usage::

cache = LRUCache(32) # new cache
cache['foo'] = get_file_contents('foo') # or whatever

if 'foo' in cache: # if it's still in cache...
    # use cached version
    contents = cache['foo']
else:
    # recalculate
    contents = get_file_contents('foo')
    # store in cache for next time
    cache['foo'] = contents

print cache.size # Maximum size

print len(cache) # 0 <= len(cache) <= cache.size

cache.size = 10 # Auto-shrink on size assignment

for i in range(50): # note: larger than cache size
    cache[i] = i

if 0 not in cache: print 'Zero was discarded.'

if 42 in cache:
    del cache[42] # Manual deletion

for j in cache:   # iterate (in LRU order)
    print j, cache[j] # iterator produces keys, not values

def getRWCache

arguments

• nrItemsReadCache
• nrItemsWriteCache = 50
• maxTimeWriteCache = 2000
• writermethod