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| 1 # Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 # Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 # Use of this source code is governed by a BSD-style license that can be | 2 # Use of this source code is governed by a BSD-style license that can be |
| 3 # found in the LICENSE file. | 3 # found in the LICENSE file. |
| 4 | 4 |
| 5 MEMCACHE_FILE_SYSTEM_READ = 'MemcacheFileSystem.Get' | 5 MEMCACHE_FILE_SYSTEM_READ = 'MemcacheFileSystem.Get' |
| 6 MEMCACHE_FILE_SYSTEM_STAT = 'MemcacheFileSystem.Stat' | 6 MEMCACHE_FILE_SYSTEM_STAT = 'MemcacheFileSystem.Stat' |
| 7 MEMCACHE_URL_FETCHER = 'MemcacheUrlFetcher' |
| 7 MEMCACHE_BRANCH_UTILITY = 'BranchUtility' | 8 MEMCACHE_BRANCH_UTILITY = 'BranchUtility' |
| 8 | 9 |
| 9 class AppEngineMemcache(object): | 10 class AppEngineMemcache(object): |
| 10 """A wrapper around the standard App Engine memcache that enforces namespace | 11 """A wrapper around the standard App Engine memcache that enforces namespace |
| 11 use. Uses a branch to make sure there are no key collisions if separate | 12 use. Uses a branch to make sure there are no key collisions if separate |
| 12 branches cache the same file. | 13 branches cache the same file. |
| 13 """ | 14 """ |
| 14 def __init__(self, branch, memcache): | 15 def __init__(self, branch, memcache): |
| 15 self._branch = branch | 16 self._branch = branch |
| 16 self._memcache = memcache | 17 self._memcache = memcache |
| 17 | 18 |
| 18 def Set(self, key, value, namespace, time=60): | 19 def Set(self, key, value, namespace, time=60): |
| 19 return self._memcache.set(key, | 20 return self._memcache.set(key, |
| 20 value, | 21 value, |
| 21 namespace=self._branch + '.' + namespace, | 22 namespace=self._branch + '.' + namespace, |
| 22 time=time) | 23 time=time) |
| 23 | 24 |
| 24 def Get(self, key, namespace): | 25 def Get(self, key, namespace): |
| 25 return self._memcache.get(key, namespace=self._branch + '.' + namespace) | 26 return self._memcache.get(key, namespace=self._branch + '.' + namespace) |
| 26 | 27 |
| 27 def Delete(self, key, namespace): | 28 def Delete(self, key, namespace): |
| 28 return self._memcache.delete(key, namespace=self._branch + '.' + namespace) | 29 return self._memcache.delete(key, namespace=self._branch + '.' + namespace) |
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