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import time
from datetime import datetime
import shutil
from beaker.cache import CacheManager, cache_regions
from beaker.util import parse_cache_config_options
defaults = {'cache.data_dir':'./cache', 'cache.type':'dbm', 'cache.expire': 2}
def teardown_module():
import shutil
shutil.rmtree('./cache', True)
def make_cache_obj(**kwargs):
opts = defaults.copy()
opts.update(kwargs)
cache = CacheManager(**parse_cache_config_options(opts))
return cache
def make_region_cached_func():
global _cache_obj
opts = {}
opts['cache.regions'] = 'short_term, long_term'
opts['cache.short_term.expire'] = '2'
cache = make_cache_obj(**opts)
@cache.region('short_term', 'region_loader')
def load(person):
now = datetime.now()
return "Hi there %s, its currently %s" % (person, now)
_cache_obj = cache
return load
def make_cached_func():
global _cache_obj
cache = make_cache_obj()
@cache.cache('loader')
def load(person):
now = datetime.now()
return "Hi there %s, its currently %s" % (person, now)
_cache_obj = cache
return load
def test_parse_doesnt_allow_none():
opts = {}
opts['cache.regions'] = 'short_term, long_term'
for region, params in parse_cache_config_options(opts)['cache_regions'].items():
for k, v in params.items():
assert v != 'None', k
def test_parse_doesnt_allow_empty_region_name():
opts = {}
opts['cache.regions'] = ''
regions = parse_cache_config_options(opts)['cache_regions']
assert len(regions) == 0
def test_decorators():
for func in (make_region_cached_func, make_cached_func):
check_decorator(func())
def check_decorator(func):
result = func('Fred')
assert 'Fred' in result
result2 = func('Fred')
assert result == result2
result3 = func('George')
assert 'George' in result3
result4 = func('George')
assert result3 == result4
time.sleep(2)
result2 = func('Fred')
assert result != result2
def test_check_invalidate_region():
func = make_region_cached_func()
result = func('Fred')
assert 'Fred' in result
result2 = func('Fred')
assert result == result2
_cache_obj.region_invalidate(func, None, 'region_loader', 'Fred')
result3 = func('Fred')
assert result3 != result2
result2 = func('Fred')
assert result3 == result2
# Invalidate a non-existent key
_cache_obj.region_invalidate(func, None, 'region_loader', 'Fredd')
assert result3 == result2
def test_check_invalidate():
func = make_cached_func()
result = func('Fred')
assert 'Fred' in result
result2 = func('Fred')
assert result == result2
_cache_obj.invalidate(func, 'loader', 'Fred')
result3 = func('Fred')
assert result3 != result2
result2 = func('Fred')
assert result3 == result2
# Invalidate a non-existent key
_cache_obj.invalidate(func, 'loader', 'Fredd')
assert result3 == result2
def test_long_name():
func = make_cached_func()
name = 'Fred' * 250
result = func(name)
assert name in result
result2 = func(name)
assert result == result2
# This won't actually invalidate it since the key won't be sha'd
_cache_obj.invalidate(func, 'loader', name, key_length=8000)
result3 = func(name)
assert result3 == result2
# And now this should invalidate it
_cache_obj.invalidate(func, 'loader', name)
result4 = func(name)
assert result3 != result4
def test_cache_region_has_default_key_length():
try:
cache = CacheManager(cache_regions={
'short_term_without_key_length':{
'expire': 60,
'type': 'memory'
}
})
# Check CacheManager registered the region in global regions
assert 'short_term_without_key_length' in cache_regions
@cache.region('short_term_without_key_length')
def load_without_key_length(person):
now = datetime.now()
return "Hi there %s, its currently %s" % (person, now)
# Ensure that same person gets same time
msg = load_without_key_length('fred')
msg2 = load_without_key_length('fred')
assert msg == msg2, (msg, msg2)
# Ensure that different person gets different time
msg3 = load_without_key_length('george')
assert msg3.split(',')[-1] != msg2.split(',')[-1]
finally:
# throw away region for this test
cache_regions.pop('short_term_without_key_length', None)
def test_cache_region_expire_is_always_int():
try:
cache = CacheManager(cache_regions={
'short_term_with_string_expire': {
'expire': '60',
'type': 'memory'
}
})
# Check CacheManager registered the region in global regions
assert 'short_term_with_string_expire' in cache_regions
@cache.region('short_term_with_string_expire')
def load_with_str_expire(person):
now = datetime.now()
return "Hi there %s, its currently %s" % (person, now)
# Ensure that same person gets same time
msg = load_with_str_expire('fred')
msg2 = load_with_str_expire('fred')
assert msg == msg2, (msg, msg2)
finally:
# throw away region for this test
cache_regions.pop('short_term_with_string_expire', None)
def test_directory_goes_away():
cache = CacheManager(cache_regions={
'short_term_without_key_length':{
'expire': 60,
'type': 'dbm',
'data_dir': '/tmp/beaker-tests/cache/data',
'lock_dir': '/tmp/beaker-tests/cache/lock'
}
})
@cache.region('short_term_without_key_length')
def load_with_str_expire(person):
now = datetime.now()
return "Hi there %s, its currently %s" % (person, now)
# Ensure that same person gets same time
msg = load_with_str_expire('fred')
msg2 = load_with_str_expire('fred')
shutil.rmtree('/tmp/beaker-tests')
msg3 = load_with_str_expire('fred')
assert msg == msg2, (msg, msg2)
assert msg2 != msg3, (msg2, msg3)
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