diff options
Diffstat (limited to 'synapse/util/caches/descriptors.py')
| -rw-r--r-- | synapse/util/caches/descriptors.py | 42 |
1 files changed, 33 insertions, 9 deletions
diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py index 807e147657..aa182eeac7 100644 --- a/synapse/util/caches/descriptors.py +++ b/synapse/util/caches/descriptors.py @@ -18,6 +18,7 @@ from synapse.util.async import ObservableDeferred from synapse.util import unwrapFirstError, logcontext from synapse.util.caches.lrucache import LruCache from synapse.util.caches.treecache import TreeCache, iterate_tree_cache_entry +from synapse.util.stringutils import to_ascii from . import register_cache @@ -163,10 +164,6 @@ class Cache(object): def invalidate(self, key): self.check_thread() - if not isinstance(key, tuple): - raise TypeError( - "The cache key must be a tuple not %r" % (type(key),) - ) # Increment the sequence number so that any SELECT statements that # raced with the INSERT don't update the cache (SYN-369) @@ -312,7 +309,7 @@ class CacheDescriptor(_CacheDescriptorBase): iterable=self.iterable, ) - def get_cache_key(args, kwargs): + def get_cache_key_gen(args, kwargs): """Given some args/kwargs return a generator that resolves into the cache_key. @@ -330,13 +327,29 @@ class CacheDescriptor(_CacheDescriptorBase): else: yield self.arg_defaults[nm] + # By default our cache key is a tuple, but if there is only one item + # then don't bother wrapping in a tuple. This is to save memory. + if self.num_args == 1: + nm = self.arg_names[0] + + def get_cache_key(args, kwargs): + if nm in kwargs: + return kwargs[nm] + elif len(args): + return args[0] + else: + return self.arg_defaults[nm] + else: + def get_cache_key(args, kwargs): + return tuple(get_cache_key_gen(args, kwargs)) + @functools.wraps(self.orig) def wrapped(*args, **kwargs): # If we're passed a cache_context then we'll want to call its invalidate() # whenever we are invalidated invalidate_callback = kwargs.pop("on_invalidate", None) - cache_key = tuple(get_cache_key(args, kwargs)) + cache_key = get_cache_key(args, kwargs) # Add our own `cache_context` to argument list if the wrapped function # has asked for one @@ -363,6 +376,11 @@ class CacheDescriptor(_CacheDescriptorBase): ret.addErrback(onErr) + # If our cache_key is a string, try to convert to ascii to save + # a bit of space in large caches + if isinstance(cache_key, basestring): + cache_key = to_ascii(cache_key) + result_d = ObservableDeferred(ret, consumeErrors=True) cache.set(cache_key, result_d, callback=invalidate_callback) observer = result_d.observe() @@ -372,10 +390,16 @@ class CacheDescriptor(_CacheDescriptorBase): else: return observer - wrapped.invalidate = cache.invalidate + if self.num_args == 1: + wrapped.invalidate = lambda key: cache.invalidate(key[0]) + wrapped.prefill = lambda key, val: cache.prefill(key[0], val) + else: + wrapped.invalidate = cache.invalidate + wrapped.invalidate_all = cache.invalidate_all + wrapped.invalidate_many = cache.invalidate_many + wrapped.prefill = cache.prefill + wrapped.invalidate_all = cache.invalidate_all - wrapped.invalidate_many = cache.invalidate_many - wrapped.prefill = cache.prefill wrapped.cache = cache obj.__dict__[self.orig.__name__] = wrapped |