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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 class _CacheEntry(object): | 5 class _CacheEntry(object): |
6 def __init__(self, cache_data, version): | 6 def __init__(self, cache_data, version): |
7 self._cache_data = cache_data | 7 self._cache_data = cache_data |
8 self.version = version | 8 self.version = version |
9 | 9 |
10 class CompiledFileSystem(object): | 10 class CompiledFileSystem(object): |
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82 files.append(filename) | 82 files.append(filename) |
83 return files | 83 return files |
84 | 84 |
85 def GetFromFile(self, path, binary=False): | 85 def GetFromFile(self, path, binary=False): |
86 """Calls |populate_function| on the contents of the file at |path|. If | 86 """Calls |populate_function| on the contents of the file at |path|. If |
87 |binary| is True then the file will be read as binary - but this will only | 87 |binary| is True then the file will be read as binary - but this will only |
88 apply for the first time the file is fetched; if already cached, |binary| | 88 apply for the first time the file is fetched; if already cached, |binary| |
89 will be ignored. | 89 will be ignored. |
90 """ | 90 """ |
91 version = self._file_system.Stat(path).version | 91 version = self._file_system.Stat(path).version |
92 cache_entry = self._file_object_store.Get(path, time=0).Get() | 92 cache_entry = self._file_object_store.Get(path).Get() |
93 if (cache_entry is not None) and (version == cache_entry.version): | 93 if (cache_entry is not None) and (version == cache_entry.version): |
94 return cache_entry._cache_data | 94 return cache_entry._cache_data |
95 cache_data = self._populate_function( | 95 cache_data = self._populate_function( |
96 path, | 96 path, |
97 self._file_system.ReadSingle(path, binary=binary)) | 97 self._file_system.ReadSingle(path, binary=binary)) |
98 self._file_object_store.Set(path, _CacheEntry(cache_data, version), time=0) | 98 self._file_object_store.Set(path, _CacheEntry(cache_data, version)) |
99 return cache_data | 99 return cache_data |
100 | 100 |
101 def GetFromFileListing(self, path): | 101 def GetFromFileListing(self, path): |
102 """Calls |populate_function| on the listing of the files at |path|. | 102 """Calls |populate_function| on the listing of the files at |path|. |
103 Assumes that the path given is to a directory. | 103 Assumes that the path given is to a directory. |
104 """ | 104 """ |
105 if not path.endswith('/'): | 105 if not path.endswith('/'): |
106 path += '/' | 106 path += '/' |
107 version = self._file_system.Stat(path).version | 107 version = self._file_system.Stat(path).version |
108 cache_entry = self._list_object_store.Get(path, time=0).Get() | 108 cache_entry = self._list_object_store.Get(path).Get() |
109 if (cache_entry is not None) and (version == cache_entry.version): | 109 if (cache_entry is not None) and (version == cache_entry.version): |
110 return cache_entry._cache_data | 110 return cache_entry._cache_data |
111 cache_data = self._populate_function(path, self._RecursiveList(path)) | 111 cache_data = self._populate_function(path, self._RecursiveList(path)) |
112 self._list_object_store.Set(path, _CacheEntry(cache_data, version), time=0) | 112 self._list_object_store.Set(path, _CacheEntry(cache_data, version)) |
113 return cache_data | 113 return cache_data |
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