diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index 37bb28e6cf..d038c55092 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -25,6 +25,7 @@ import synapse.metrics
from twisted.internet import defer
from collections import namedtuple, OrderedDict
+import functools
import simplejson as json
import sys
import time
@@ -53,13 +54,12 @@ cache_counter = metrics.register_cache(
# TODO(paul):
-# * more generic key management
# * consider other eviction strategies - LRU?
-def cached(max_entries=1000):
+def cached(max_entries=1000, num_args=1):
""" A method decorator that applies a memoizing cache around the function.
- The function is presumed to take one additional argument, which is used as
- the key for the cache. Cache hits are served directly from the cache;
+ The function is presumed to take zero or more arguments, which are used in
+ a tuple as the key for the cache. Hits are served directly from the cache;
misses use the function body to generate the value.
The wrapped function has an additional member, a callable called
@@ -75,25 +75,41 @@ def cached(max_entries=1000):
caches_by_name[name] = cache
- def prefill(key, value):
+ def prefill(*args): # because I can't *keyargs, value
+ keyargs = args[:-1]
+ value = args[-1]
+
+ if len(keyargs) != num_args:
+ raise ValueError("Expected a call to have %d arguments", num_args)
+
while len(cache) > max_entries:
cache.popitem(last=False)
- cache[key] = value
+ cache[keyargs] = value
+ @functools.wraps(orig)
@defer.inlineCallbacks
- def wrapped(self, key):
- if key in cache:
+ def wrapped(self, *keyargs):
+ if len(keyargs) != num_args:
+ raise ValueError("Expected a call to have %d arguments", num_args)
+
+ if keyargs in cache:
cache_counter.inc_hits(name)
- defer.returnValue(cache[key])
+ defer.returnValue(cache[keyargs])
cache_counter.inc_misses(name)
- ret = yield orig(self, key)
- prefill(key, ret)
+ ret = yield orig(self, *keyargs)
+
+ prefill_args = keyargs + (ret,)
+ prefill(*prefill_args)
+
defer.returnValue(ret)
- def invalidate(key):
- cache.pop(key, None)
+ def invalidate(*keyargs):
+ if len(keyargs) != num_args:
+ raise ValueError("Expected a call to have %d arguments", num_args)
+
+ cache.pop(keyargs, None)
wrapped.invalidate = invalidate
wrapped.prefill = prefill
@@ -325,7 +341,8 @@ class SQLBaseStore(object):
# "Simple" SQL API methods that operate on a single table with no JOINs,
# no complex WHERE clauses, just a dict of values for columns.
- def _simple_insert(self, table, values, or_replace=False, or_ignore=False):
+ def _simple_insert(self, table, values, or_replace=False, or_ignore=False,
+ desc="_simple_insert"):
"""Executes an INSERT query on the named table.
Args:
@@ -334,7 +351,7 @@ class SQLBaseStore(object):
or_replace : bool; if True performs an INSERT OR REPLACE
"""
return self.runInteraction(
- "_simple_insert",
+ desc,
self._simple_insert_txn, table, values, or_replace=or_replace,
or_ignore=or_ignore,
)
@@ -357,7 +374,7 @@ class SQLBaseStore(object):
txn.execute(sql, values.values())
return txn.lastrowid
- def _simple_upsert(self, table, keyvalues, values):
+ def _simple_upsert(self, table, keyvalues, values, desc="_simple_upsert"):
"""
Args:
table (str): The table to upsert into
@@ -366,7 +383,7 @@ class SQLBaseStore(object):
Returns: A deferred
"""
return self.runInteraction(
- "_simple_upsert",
+ desc,
self._simple_upsert_txn, table, keyvalues, values
)
@@ -402,7 +419,7 @@ class SQLBaseStore(object):
txn.execute(sql, allvalues.values())
def _simple_select_one(self, table, keyvalues, retcols,
- allow_none=False):
+ allow_none=False, desc="_simple_select_one"):
"""Executes a SELECT query on the named table, which is expected to
return a single row, returning a single column from it.
@@ -414,12 +431,15 @@ class SQLBaseStore(object):
allow_none : If true, return None instead of failing if the SELECT
statement returns no rows
"""
- return self._simple_selectupdate_one(
- table, keyvalues, retcols=retcols, allow_none=allow_none
+ return self.runInteraction(
+ desc,
+ self._simple_select_one_txn,
+ table, keyvalues, retcols, allow_none,
)
def _simple_select_one_onecol(self, table, keyvalues, retcol,
- allow_none=False):
+ allow_none=False,
+ desc="_simple_select_one_onecol"):
"""Executes a SELECT query on the named table, which is expected to
return a single row, returning a single column from it."
@@ -429,7 +449,7 @@ class SQLBaseStore(object):
retcol : string giving the name of the column to return
"""
return self.runInteraction(
- "_simple_select_one_onecol",
+ desc,
self._simple_select_one_onecol_txn,
table, keyvalues, retcol, allow_none=allow_none,
)
@@ -464,7 +484,8 @@ class SQLBaseStore(object):
return [r[0] for r in txn.fetchall()]
- def _simple_select_onecol(self, table, keyvalues, retcol):
+ def _simple_select_onecol(self, table, keyvalues, retcol,
+ desc="_simple_select_onecol"):
"""Executes a SELECT query on the named table, which returns a list
comprising of the values of the named column from the selected rows.
@@ -477,12 +498,13 @@ class SQLBaseStore(object):
Deferred: Results in a list
"""
return self.runInteraction(
- "_simple_select_onecol",
+ desc,
self._simple_select_onecol_txn,
table, keyvalues, retcol
)
- def _simple_select_list(self, table, keyvalues, retcols):
+ def _simple_select_list(self, table, keyvalues, retcols,
+ desc="_simple_select_list"):
"""Executes a SELECT query on the named table, which may return zero or
more rows, returning the result as a list of dicts.
@@ -493,7 +515,7 @@ class SQLBaseStore(object):
retcols : list of strings giving the names of the columns to return
"""
return self.runInteraction(
- "_simple_select_list",
+ desc,
self._simple_select_list_txn,
table, keyvalues, retcols
)
@@ -525,7 +547,7 @@ class SQLBaseStore(object):
return self.cursor_to_dict(txn)
def _simple_update_one(self, table, keyvalues, updatevalues,
- retcols=None):
+ desc="_simple_update_one"):
"""Executes an UPDATE query on the named table, setting new values for
columns in a row matching the key values.
@@ -543,45 +565,70 @@ class SQLBaseStore(object):
get-and-set. This can be used to implement compare-and-set by putting
the update column in the 'keyvalues' dict as well.
"""
- return self._simple_selectupdate_one(table, keyvalues, updatevalues,
- retcols=retcols)
+ return self.runInteraction(
+ desc,
+ self._simple_update_one_txn,
+ table, keyvalues, updatevalues,
+ )
- def _simple_selectupdate_one(self, table, keyvalues, updatevalues=None,
- retcols=None, allow_none=False):
- """ Combined SELECT then UPDATE."""
- if retcols:
- select_sql = "SELECT %s FROM %s WHERE %s" % (
- ", ".join(retcols),
- table,
- " AND ".join("%s = ?" % (k) for k in keyvalues)
- )
+ def _simple_update_one_txn(self, txn, table, keyvalues, updatevalues):
+ update_sql = "UPDATE %s SET %s WHERE %s" % (
+ table,
+ ", ".join("%s = ?" % (k,) for k in updatevalues),
+ " AND ".join("%s = ?" % (k,) for k in keyvalues)
+ )
- if updatevalues:
- update_sql = "UPDATE %s SET %s WHERE %s" % (
- table,
- ", ".join("%s = ?" % (k,) for k in updatevalues),
- " AND ".join("%s = ?" % (k,) for k in keyvalues)
- )
+ txn.execute(
+ update_sql,
+ updatevalues.values() + keyvalues.values()
+ )
+
+ if txn.rowcount == 0:
+ raise StoreError(404, "No row found")
+ if txn.rowcount > 1:
+ raise StoreError(500, "More than one row matched")
+
+ def _simple_select_one_txn(self, txn, table, keyvalues, retcols,
+ allow_none=False):
+ select_sql = "SELECT %s FROM %s WHERE %s ORDER BY rowid asc" % (
+ ", ".join(retcols),
+ table,
+ " AND ".join("%s = ?" % (k) for k in keyvalues)
+ )
+
+ txn.execute(select_sql, keyvalues.values())
+
+ row = txn.fetchone()
+ if not row:
+ if allow_none:
+ return None
+ raise StoreError(404, "No row found")
+ if txn.rowcount > 1:
+ raise StoreError(500, "More than one row matched")
+
+ return dict(zip(retcols, row))
+ def _simple_selectupdate_one(self, table, keyvalues, updatevalues=None,
+ retcols=None, allow_none=False,
+ desc="_simple_selectupdate_one"):
+ """ Combined SELECT then UPDATE."""
def func(txn):
ret = None
if retcols:
- txn.execute(select_sql, keyvalues.values())
-
- row = txn.fetchone()
- if not row:
- if allow_none:
- return None
- raise StoreError(404, "No row found")
- if txn.rowcount > 1:
- raise StoreError(500, "More than one row matched")
-
- ret = dict(zip(retcols, row))
+ ret = self._simple_select_one_txn(
+ txn,
+ table=table,
+ keyvalues=keyvalues,
+ retcols=retcols,
+ allow_none=allow_none,
+ )
if updatevalues:
- txn.execute(
- update_sql,
- updatevalues.values() + keyvalues.values()
+ self._simple_update_one_txn(
+ txn,
+ table=table,
+ keyvalues=keyvalues,
+ updatevalues=updatevalues,
)
# if txn.rowcount == 0:
@@ -590,9 +637,9 @@ class SQLBaseStore(object):
raise StoreError(500, "More than one row matched")
return ret
- return self.runInteraction("_simple_selectupdate_one", func)
+ return self.runInteraction(desc, func)
- def _simple_delete_one(self, table, keyvalues):
+ def _simple_delete_one(self, table, keyvalues, desc="_simple_delete_one"):
"""Executes a DELETE query on the named table, expecting to delete a
single row.
@@ -611,9 +658,9 @@ class SQLBaseStore(object):
raise StoreError(404, "No row found")
if txn.rowcount > 1:
raise StoreError(500, "more than one row matched")
- return self.runInteraction("_simple_delete_one", func)
+ return self.runInteraction(desc, func)
- def _simple_delete(self, table, keyvalues):
+ def _simple_delete(self, table, keyvalues, desc="_simple_delete"):
"""Executes a DELETE query on the named table.
Args:
@@ -621,7 +668,7 @@ class SQLBaseStore(object):
keyvalues : dict of column names and values to select the row with
"""
- return self.runInteraction("_simple_delete", self._simple_delete_txn)
+ return self.runInteraction(desc, self._simple_delete_txn)
def _simple_delete_txn(self, txn, table, keyvalues):
sql = "DELETE FROM %s WHERE %s" % (
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