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@@ -1,362 +1,364 b'' | |||||
1 | #!/usr/bin/env python |
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1 | #!/usr/bin/env python | |
2 |
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2 | |||
3 | """ PickleShare - a small 'shelve' like datastore with concurrency support |
|
3 | """ PickleShare - a small 'shelve' like datastore with concurrency support | |
4 |
|
4 | |||
5 | Like shelve, a PickleShareDB object acts like a normal dictionary. Unlike |
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5 | Like shelve, a PickleShareDB object acts like a normal dictionary. Unlike | |
6 | shelve, many processes can access the database simultaneously. Changing a |
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6 | shelve, many processes can access the database simultaneously. Changing a | |
7 | value in database is immediately visible to other processes accessing the |
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7 | value in database is immediately visible to other processes accessing the | |
8 | same database. |
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8 | same database. | |
9 |
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9 | |||
10 | Concurrency is possible because the values are stored in separate files. Hence |
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10 | Concurrency is possible because the values are stored in separate files. Hence | |
11 | the "database" is a directory where *all* files are governed by PickleShare. |
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11 | the "database" is a directory where *all* files are governed by PickleShare. | |
12 |
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12 | |||
13 | Example usage:: |
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13 | Example usage:: | |
14 |
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14 | |||
15 | from pickleshare import * |
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15 | from pickleshare import * | |
16 | db = PickleShareDB('~/testpickleshare') |
|
16 | db = PickleShareDB('~/testpickleshare') | |
17 | db.clear() |
|
17 | db.clear() | |
18 | print "Should be empty:",db.items() |
|
18 | print "Should be empty:",db.items() | |
19 | db['hello'] = 15 |
|
19 | db['hello'] = 15 | |
20 | db['aku ankka'] = [1,2,313] |
|
20 | db['aku ankka'] = [1,2,313] | |
21 | db['paths/are/ok/key'] = [1,(5,46)] |
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21 | db['paths/are/ok/key'] = [1,(5,46)] | |
22 | print db.keys() |
|
22 | print db.keys() | |
23 | del db['aku ankka'] |
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23 | del db['aku ankka'] | |
24 |
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24 | |||
25 | This module is certainly not ZODB, but can be used for low-load |
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25 | This module is certainly not ZODB, but can be used for low-load | |
26 | (non-mission-critical) situations where tiny code size trumps the |
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26 | (non-mission-critical) situations where tiny code size trumps the | |
27 | advanced features of a "real" object database. |
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27 | advanced features of a "real" object database. | |
28 |
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28 | |||
29 | Installation guide: easy_install pickleshare |
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29 | Installation guide: easy_install pickleshare | |
30 |
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30 | |||
31 | Author: Ville Vainio <vivainio@gmail.com> |
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31 | Author: Ville Vainio <vivainio@gmail.com> | |
32 | License: MIT open source license. |
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32 | License: MIT open source license. | |
33 |
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33 | |||
34 | """ |
|
34 | """ | |
35 |
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35 | |||
36 | from IPython.external.path import path as Path |
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36 | from IPython.external.path import path as Path | |
37 | import os,stat,time |
|
37 | import os,stat,time | |
38 | import collections |
|
38 | import collections | |
39 | import cPickle as pickle |
|
39 | import cPickle as pickle | |
40 | import glob |
|
40 | import glob | |
41 |
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41 | |||
42 | def gethashfile(key): |
|
42 | def gethashfile(key): | |
43 | return ("%02x" % abs(hash(key) % 256))[-2:] |
|
43 | return ("%02x" % abs(hash(key) % 256))[-2:] | |
44 |
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44 | |||
45 | _sentinel = object() |
|
45 | _sentinel = object() | |
46 |
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46 | |||
47 | class PickleShareDB(collections.MutableMapping): |
|
47 | class PickleShareDB(collections.MutableMapping): | |
48 | """ The main 'connection' object for PickleShare database """ |
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48 | """ The main 'connection' object for PickleShare database """ | |
49 | def __init__(self,root): |
|
49 | def __init__(self,root): | |
50 | """ Return a db object that will manage the specied directory""" |
|
50 | """ Return a db object that will manage the specied directory""" | |
51 | self.root = Path(root).expanduser().abspath() |
|
51 | self.root = Path(root).expanduser().abspath() | |
52 | if not self.root.isdir(): |
|
52 | if not self.root.isdir(): | |
53 | self.root.makedirs() |
|
53 | self.root.makedirs() | |
54 | # cache has { 'key' : (obj, orig_mod_time) } |
|
54 | # cache has { 'key' : (obj, orig_mod_time) } | |
55 | self.cache = {} |
|
55 | self.cache = {} | |
56 |
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56 | |||
57 |
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57 | |||
58 | def __getitem__(self,key): |
|
58 | def __getitem__(self,key): | |
59 | """ db['key'] reading """ |
|
59 | """ db['key'] reading """ | |
60 | fil = self.root / key |
|
60 | fil = self.root / key | |
61 | try: |
|
61 | try: | |
62 | mtime = (fil.stat()[stat.ST_MTIME]) |
|
62 | mtime = (fil.stat()[stat.ST_MTIME]) | |
63 | except OSError: |
|
63 | except OSError: | |
64 | raise KeyError(key) |
|
64 | raise KeyError(key) | |
65 |
|
65 | |||
66 | if fil in self.cache and mtime == self.cache[fil][1]: |
|
66 | if fil in self.cache and mtime == self.cache[fil][1]: | |
67 | return self.cache[fil][0] |
|
67 | return self.cache[fil][0] | |
68 | try: |
|
68 | try: | |
69 | # The cached item has expired, need to read |
|
69 | # The cached item has expired, need to read | |
70 | obj = pickle.loads(fil.open("rbU").read()) |
|
70 | obj = pickle.loads(fil.open("rbU").read()) | |
71 | except: |
|
71 | except: | |
72 | raise KeyError(key) |
|
72 | raise KeyError(key) | |
73 |
|
73 | |||
74 | self.cache[fil] = (obj,mtime) |
|
74 | self.cache[fil] = (obj,mtime) | |
75 | return obj |
|
75 | return obj | |
76 |
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76 | |||
77 | def __setitem__(self,key,value): |
|
77 | def __setitem__(self,key,value): | |
78 | """ db['key'] = 5 """ |
|
78 | """ db['key'] = 5 """ | |
79 | fil = self.root / key |
|
79 | fil = self.root / key | |
80 | parent = fil.parent |
|
80 | parent = fil.parent | |
81 | if parent and not parent.isdir(): |
|
81 | if parent and not parent.isdir(): | |
82 | parent.makedirs() |
|
82 | parent.makedirs() | |
83 | pickled = pickle.dump(value,fil.open('wb')) |
|
83 | # We specify protocol 2, so that we can mostly go between Python 2 | |
|
84 | # and Python 3. We can upgrade to protocol 3 when Python 2 is obsolete. | |||
|
85 | pickled = pickle.dump(value,fil.open('wb'), protocol=2) | |||
84 | try: |
|
86 | try: | |
85 | self.cache[fil] = (value,fil.mtime) |
|
87 | self.cache[fil] = (value,fil.mtime) | |
86 | except OSError,e: |
|
88 | except OSError,e: | |
87 | if e.errno != 2: |
|
89 | if e.errno != 2: | |
88 | raise |
|
90 | raise | |
89 |
|
91 | |||
90 | def hset(self, hashroot, key, value): |
|
92 | def hset(self, hashroot, key, value): | |
91 | """ hashed set """ |
|
93 | """ hashed set """ | |
92 | hroot = self.root / hashroot |
|
94 | hroot = self.root / hashroot | |
93 | if not hroot.isdir(): |
|
95 | if not hroot.isdir(): | |
94 | hroot.makedirs() |
|
96 | hroot.makedirs() | |
95 | hfile = hroot / gethashfile(key) |
|
97 | hfile = hroot / gethashfile(key) | |
96 | d = self.get(hfile, {}) |
|
98 | d = self.get(hfile, {}) | |
97 | d.update( {key : value}) |
|
99 | d.update( {key : value}) | |
98 | self[hfile] = d |
|
100 | self[hfile] = d | |
99 |
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101 | |||
100 |
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102 | |||
101 |
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103 | |||
102 | def hget(self, hashroot, key, default = _sentinel, fast_only = True): |
|
104 | def hget(self, hashroot, key, default = _sentinel, fast_only = True): | |
103 | """ hashed get """ |
|
105 | """ hashed get """ | |
104 | hroot = self.root / hashroot |
|
106 | hroot = self.root / hashroot | |
105 | hfile = hroot / gethashfile(key) |
|
107 | hfile = hroot / gethashfile(key) | |
106 |
|
108 | |||
107 | d = self.get(hfile, _sentinel ) |
|
109 | d = self.get(hfile, _sentinel ) | |
108 | #print "got dict",d,"from",hfile |
|
110 | #print "got dict",d,"from",hfile | |
109 | if d is _sentinel: |
|
111 | if d is _sentinel: | |
110 | if fast_only: |
|
112 | if fast_only: | |
111 | if default is _sentinel: |
|
113 | if default is _sentinel: | |
112 | raise KeyError(key) |
|
114 | raise KeyError(key) | |
113 |
|
115 | |||
114 | return default |
|
116 | return default | |
115 |
|
117 | |||
116 | # slow mode ok, works even after hcompress() |
|
118 | # slow mode ok, works even after hcompress() | |
117 | d = self.hdict(hashroot) |
|
119 | d = self.hdict(hashroot) | |
118 |
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120 | |||
119 | return d.get(key, default) |
|
121 | return d.get(key, default) | |
120 |
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122 | |||
121 | def hdict(self, hashroot): |
|
123 | def hdict(self, hashroot): | |
122 | """ Get all data contained in hashed category 'hashroot' as dict """ |
|
124 | """ Get all data contained in hashed category 'hashroot' as dict """ | |
123 | hfiles = self.keys(hashroot + "/*") |
|
125 | hfiles = self.keys(hashroot + "/*") | |
124 | hfiles.sort() |
|
126 | hfiles.sort() | |
125 | last = len(hfiles) and hfiles[-1] or '' |
|
127 | last = len(hfiles) and hfiles[-1] or '' | |
126 | if last.endswith('xx'): |
|
128 | if last.endswith('xx'): | |
127 | # print "using xx" |
|
129 | # print "using xx" | |
128 | hfiles = [last] + hfiles[:-1] |
|
130 | hfiles = [last] + hfiles[:-1] | |
129 |
|
131 | |||
130 | all = {} |
|
132 | all = {} | |
131 |
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133 | |||
132 | for f in hfiles: |
|
134 | for f in hfiles: | |
133 | # print "using",f |
|
135 | # print "using",f | |
134 | try: |
|
136 | try: | |
135 | all.update(self[f]) |
|
137 | all.update(self[f]) | |
136 | except KeyError: |
|
138 | except KeyError: | |
137 | print "Corrupt",f,"deleted - hset is not threadsafe!" |
|
139 | print "Corrupt",f,"deleted - hset is not threadsafe!" | |
138 | del self[f] |
|
140 | del self[f] | |
139 |
|
141 | |||
140 | self.uncache(f) |
|
142 | self.uncache(f) | |
141 |
|
143 | |||
142 | return all |
|
144 | return all | |
143 |
|
145 | |||
144 | def hcompress(self, hashroot): |
|
146 | def hcompress(self, hashroot): | |
145 | """ Compress category 'hashroot', so hset is fast again |
|
147 | """ Compress category 'hashroot', so hset is fast again | |
146 |
|
148 | |||
147 | hget will fail if fast_only is True for compressed items (that were |
|
149 | hget will fail if fast_only is True for compressed items (that were | |
148 | hset before hcompress). |
|
150 | hset before hcompress). | |
149 |
|
151 | |||
150 | """ |
|
152 | """ | |
151 | hfiles = self.keys(hashroot + "/*") |
|
153 | hfiles = self.keys(hashroot + "/*") | |
152 | all = {} |
|
154 | all = {} | |
153 | for f in hfiles: |
|
155 | for f in hfiles: | |
154 | # print "using",f |
|
156 | # print "using",f | |
155 | all.update(self[f]) |
|
157 | all.update(self[f]) | |
156 | self.uncache(f) |
|
158 | self.uncache(f) | |
157 |
|
159 | |||
158 | self[hashroot + '/xx'] = all |
|
160 | self[hashroot + '/xx'] = all | |
159 | for f in hfiles: |
|
161 | for f in hfiles: | |
160 | p = self.root / f |
|
162 | p = self.root / f | |
161 | if p.basename() == 'xx': |
|
163 | if p.basename() == 'xx': | |
162 | continue |
|
164 | continue | |
163 | p.remove() |
|
165 | p.remove() | |
164 |
|
166 | |||
165 |
|
167 | |||
166 |
|
168 | |||
167 | def __delitem__(self,key): |
|
169 | def __delitem__(self,key): | |
168 | """ del db["key"] """ |
|
170 | """ del db["key"] """ | |
169 | fil = self.root / key |
|
171 | fil = self.root / key | |
170 | self.cache.pop(fil,None) |
|
172 | self.cache.pop(fil,None) | |
171 | try: |
|
173 | try: | |
172 | fil.remove() |
|
174 | fil.remove() | |
173 | except OSError: |
|
175 | except OSError: | |
174 | # notfound and permission denied are ok - we |
|
176 | # notfound and permission denied are ok - we | |
175 | # lost, the other process wins the conflict |
|
177 | # lost, the other process wins the conflict | |
176 | pass |
|
178 | pass | |
177 |
|
179 | |||
178 | def _normalized(self, p): |
|
180 | def _normalized(self, p): | |
179 | """ Make a key suitable for user's eyes """ |
|
181 | """ Make a key suitable for user's eyes """ | |
180 | return str(self.root.relpathto(p)).replace('\\','/') |
|
182 | return str(self.root.relpathto(p)).replace('\\','/') | |
181 |
|
183 | |||
182 | def keys(self, globpat = None): |
|
184 | def keys(self, globpat = None): | |
183 | """ All keys in DB, or all keys matching a glob""" |
|
185 | """ All keys in DB, or all keys matching a glob""" | |
184 |
|
186 | |||
185 | if globpat is None: |
|
187 | if globpat is None: | |
186 | files = self.root.walkfiles() |
|
188 | files = self.root.walkfiles() | |
187 | else: |
|
189 | else: | |
188 | files = [Path(p) for p in glob.glob(self.root/globpat)] |
|
190 | files = [Path(p) for p in glob.glob(self.root/globpat)] | |
189 | return [self._normalized(p) for p in files if p.isfile()] |
|
191 | return [self._normalized(p) for p in files if p.isfile()] | |
190 |
|
192 | |||
191 | def __iter__(self): |
|
193 | def __iter__(self): | |
192 | return iter(keys) |
|
194 | return iter(keys) | |
193 |
|
195 | |||
194 | def __len__(self): |
|
196 | def __len__(self): | |
195 | return len(keys) |
|
197 | return len(keys) | |
196 |
|
198 | |||
197 | def uncache(self,*items): |
|
199 | def uncache(self,*items): | |
198 | """ Removes all, or specified items from cache |
|
200 | """ Removes all, or specified items from cache | |
199 |
|
201 | |||
200 | Use this after reading a large amount of large objects |
|
202 | Use this after reading a large amount of large objects | |
201 | to free up memory, when you won't be needing the objects |
|
203 | to free up memory, when you won't be needing the objects | |
202 | for a while. |
|
204 | for a while. | |
203 |
|
205 | |||
204 | """ |
|
206 | """ | |
205 | if not items: |
|
207 | if not items: | |
206 | self.cache = {} |
|
208 | self.cache = {} | |
207 | for it in items: |
|
209 | for it in items: | |
208 | self.cache.pop(it,None) |
|
210 | self.cache.pop(it,None) | |
209 |
|
211 | |||
210 | def waitget(self,key, maxwaittime = 60 ): |
|
212 | def waitget(self,key, maxwaittime = 60 ): | |
211 | """ Wait (poll) for a key to get a value |
|
213 | """ Wait (poll) for a key to get a value | |
212 |
|
214 | |||
213 | Will wait for `maxwaittime` seconds before raising a KeyError. |
|
215 | Will wait for `maxwaittime` seconds before raising a KeyError. | |
214 | The call exits normally if the `key` field in db gets a value |
|
216 | The call exits normally if the `key` field in db gets a value | |
215 | within the timeout period. |
|
217 | within the timeout period. | |
216 |
|
218 | |||
217 | Use this for synchronizing different processes or for ensuring |
|
219 | Use this for synchronizing different processes or for ensuring | |
218 | that an unfortunately timed "db['key'] = newvalue" operation |
|
220 | that an unfortunately timed "db['key'] = newvalue" operation | |
219 | in another process (which causes all 'get' operation to cause a |
|
221 | in another process (which causes all 'get' operation to cause a | |
220 | KeyError for the duration of pickling) won't screw up your program |
|
222 | KeyError for the duration of pickling) won't screw up your program | |
221 | logic. |
|
223 | logic. | |
222 | """ |
|
224 | """ | |
223 |
|
225 | |||
224 | wtimes = [0.2] * 3 + [0.5] * 2 + [1] |
|
226 | wtimes = [0.2] * 3 + [0.5] * 2 + [1] | |
225 | tries = 0 |
|
227 | tries = 0 | |
226 | waited = 0 |
|
228 | waited = 0 | |
227 | while 1: |
|
229 | while 1: | |
228 | try: |
|
230 | try: | |
229 | val = self[key] |
|
231 | val = self[key] | |
230 | return val |
|
232 | return val | |
231 | except KeyError: |
|
233 | except KeyError: | |
232 | pass |
|
234 | pass | |
233 |
|
235 | |||
234 | if waited > maxwaittime: |
|
236 | if waited > maxwaittime: | |
235 | raise KeyError(key) |
|
237 | raise KeyError(key) | |
236 |
|
238 | |||
237 | time.sleep(wtimes[tries]) |
|
239 | time.sleep(wtimes[tries]) | |
238 | waited+=wtimes[tries] |
|
240 | waited+=wtimes[tries] | |
239 | if tries < len(wtimes) -1: |
|
241 | if tries < len(wtimes) -1: | |
240 | tries+=1 |
|
242 | tries+=1 | |
241 |
|
243 | |||
242 | def getlink(self,folder): |
|
244 | def getlink(self,folder): | |
243 | """ Get a convenient link for accessing items """ |
|
245 | """ Get a convenient link for accessing items """ | |
244 | return PickleShareLink(self, folder) |
|
246 | return PickleShareLink(self, folder) | |
245 |
|
247 | |||
246 | def __repr__(self): |
|
248 | def __repr__(self): | |
247 | return "PickleShareDB('%s')" % self.root |
|
249 | return "PickleShareDB('%s')" % self.root | |
248 |
|
250 | |||
249 |
|
251 | |||
250 |
|
252 | |||
251 | class PickleShareLink: |
|
253 | class PickleShareLink: | |
252 | """ A shortdand for accessing nested PickleShare data conveniently. |
|
254 | """ A shortdand for accessing nested PickleShare data conveniently. | |
253 |
|
255 | |||
254 | Created through PickleShareDB.getlink(), example:: |
|
256 | Created through PickleShareDB.getlink(), example:: | |
255 |
|
257 | |||
256 | lnk = db.getlink('myobjects/test') |
|
258 | lnk = db.getlink('myobjects/test') | |
257 | lnk.foo = 2 |
|
259 | lnk.foo = 2 | |
258 | lnk.bar = lnk.foo + 5 |
|
260 | lnk.bar = lnk.foo + 5 | |
259 |
|
261 | |||
260 | """ |
|
262 | """ | |
261 | def __init__(self, db, keydir ): |
|
263 | def __init__(self, db, keydir ): | |
262 | self.__dict__.update(locals()) |
|
264 | self.__dict__.update(locals()) | |
263 |
|
265 | |||
264 | def __getattr__(self,key): |
|
266 | def __getattr__(self,key): | |
265 | return self.__dict__['db'][self.__dict__['keydir']+'/' + key] |
|
267 | return self.__dict__['db'][self.__dict__['keydir']+'/' + key] | |
266 | def __setattr__(self,key,val): |
|
268 | def __setattr__(self,key,val): | |
267 | self.db[self.keydir+'/' + key] = val |
|
269 | self.db[self.keydir+'/' + key] = val | |
268 | def __repr__(self): |
|
270 | def __repr__(self): | |
269 | db = self.__dict__['db'] |
|
271 | db = self.__dict__['db'] | |
270 | keys = db.keys( self.__dict__['keydir'] +"/*") |
|
272 | keys = db.keys( self.__dict__['keydir'] +"/*") | |
271 | return "<PickleShareLink '%s': %s>" % ( |
|
273 | return "<PickleShareLink '%s': %s>" % ( | |
272 | self.__dict__['keydir'], |
|
274 | self.__dict__['keydir'], | |
273 | ";".join([Path(k).basename() for k in keys])) |
|
275 | ";".join([Path(k).basename() for k in keys])) | |
274 |
|
276 | |||
275 |
|
277 | |||
276 | def test(): |
|
278 | def test(): | |
277 | db = PickleShareDB('~/testpickleshare') |
|
279 | db = PickleShareDB('~/testpickleshare') | |
278 | db.clear() |
|
280 | db.clear() | |
279 | print "Should be empty:",db.items() |
|
281 | print "Should be empty:",db.items() | |
280 | db['hello'] = 15 |
|
282 | db['hello'] = 15 | |
281 | db['aku ankka'] = [1,2,313] |
|
283 | db['aku ankka'] = [1,2,313] | |
282 | db['paths/nest/ok/keyname'] = [1,(5,46)] |
|
284 | db['paths/nest/ok/keyname'] = [1,(5,46)] | |
283 | db.hset('hash', 'aku', 12) |
|
285 | db.hset('hash', 'aku', 12) | |
284 | db.hset('hash', 'ankka', 313) |
|
286 | db.hset('hash', 'ankka', 313) | |
285 | print "12 =",db.hget('hash','aku') |
|
287 | print "12 =",db.hget('hash','aku') | |
286 | print "313 =",db.hget('hash','ankka') |
|
288 | print "313 =",db.hget('hash','ankka') | |
287 | print "all hashed",db.hdict('hash') |
|
289 | print "all hashed",db.hdict('hash') | |
288 | print db.keys() |
|
290 | print db.keys() | |
289 | print db.keys('paths/nest/ok/k*') |
|
291 | print db.keys('paths/nest/ok/k*') | |
290 | print dict(db) # snapsot of whole db |
|
292 | print dict(db) # snapsot of whole db | |
291 | db.uncache() # frees memory, causes re-reads later |
|
293 | db.uncache() # frees memory, causes re-reads later | |
292 |
|
294 | |||
293 | # shorthand for accessing deeply nested files |
|
295 | # shorthand for accessing deeply nested files | |
294 | lnk = db.getlink('myobjects/test') |
|
296 | lnk = db.getlink('myobjects/test') | |
295 | lnk.foo = 2 |
|
297 | lnk.foo = 2 | |
296 | lnk.bar = lnk.foo + 5 |
|
298 | lnk.bar = lnk.foo + 5 | |
297 | print lnk.bar # 7 |
|
299 | print lnk.bar # 7 | |
298 |
|
300 | |||
299 | def stress(): |
|
301 | def stress(): | |
300 | db = PickleShareDB('~/fsdbtest') |
|
302 | db = PickleShareDB('~/fsdbtest') | |
301 | import time,sys |
|
303 | import time,sys | |
302 | for i in range(1000): |
|
304 | for i in range(1000): | |
303 | for j in range(1000): |
|
305 | for j in range(1000): | |
304 | if i % 15 == 0 and i < 200: |
|
306 | if i % 15 == 0 and i < 200: | |
305 | if str(j) in db: |
|
307 | if str(j) in db: | |
306 | del db[str(j)] |
|
308 | del db[str(j)] | |
307 | continue |
|
309 | continue | |
308 |
|
310 | |||
309 | if j%33 == 0: |
|
311 | if j%33 == 0: | |
310 | time.sleep(0.02) |
|
312 | time.sleep(0.02) | |
311 |
|
313 | |||
312 | db[str(j)] = db.get(str(j), []) + [(i,j,"proc %d" % os.getpid())] |
|
314 | db[str(j)] = db.get(str(j), []) + [(i,j,"proc %d" % os.getpid())] | |
313 | db.hset('hash',j, db.hget('hash',j,15) + 1 ) |
|
315 | db.hset('hash',j, db.hget('hash',j,15) + 1 ) | |
314 |
|
316 | |||
315 | print i, |
|
317 | print i, | |
316 | sys.stdout.flush() |
|
318 | sys.stdout.flush() | |
317 | if i % 10 == 0: |
|
319 | if i % 10 == 0: | |
318 | db.uncache() |
|
320 | db.uncache() | |
319 |
|
321 | |||
320 | def main(): |
|
322 | def main(): | |
321 | import textwrap |
|
323 | import textwrap | |
322 | usage = textwrap.dedent("""\ |
|
324 | usage = textwrap.dedent("""\ | |
323 | pickleshare - manage PickleShare databases |
|
325 | pickleshare - manage PickleShare databases | |
324 |
|
326 | |||
325 | Usage: |
|
327 | Usage: | |
326 |
|
328 | |||
327 | pickleshare dump /path/to/db > dump.txt |
|
329 | pickleshare dump /path/to/db > dump.txt | |
328 | pickleshare load /path/to/db < dump.txt |
|
330 | pickleshare load /path/to/db < dump.txt | |
329 | pickleshare test /path/to/db |
|
331 | pickleshare test /path/to/db | |
330 | """) |
|
332 | """) | |
331 | DB = PickleShareDB |
|
333 | DB = PickleShareDB | |
332 | import sys |
|
334 | import sys | |
333 | if len(sys.argv) < 2: |
|
335 | if len(sys.argv) < 2: | |
334 | print usage |
|
336 | print usage | |
335 | return |
|
337 | return | |
336 |
|
338 | |||
337 | cmd = sys.argv[1] |
|
339 | cmd = sys.argv[1] | |
338 | args = sys.argv[2:] |
|
340 | args = sys.argv[2:] | |
339 | if cmd == 'dump': |
|
341 | if cmd == 'dump': | |
340 | if not args: args= ['.'] |
|
342 | if not args: args= ['.'] | |
341 | db = DB(args[0]) |
|
343 | db = DB(args[0]) | |
342 | import pprint |
|
344 | import pprint | |
343 | pprint.pprint(db.items()) |
|
345 | pprint.pprint(db.items()) | |
344 | elif cmd == 'load': |
|
346 | elif cmd == 'load': | |
345 | cont = sys.stdin.read() |
|
347 | cont = sys.stdin.read() | |
346 | db = DB(args[0]) |
|
348 | db = DB(args[0]) | |
347 | data = eval(cont) |
|
349 | data = eval(cont) | |
348 | db.clear() |
|
350 | db.clear() | |
349 | for k,v in db.items(): |
|
351 | for k,v in db.items(): | |
350 | db[k] = v |
|
352 | db[k] = v | |
351 | elif cmd == 'testwait': |
|
353 | elif cmd == 'testwait': | |
352 | db = DB(args[0]) |
|
354 | db = DB(args[0]) | |
353 | db.clear() |
|
355 | db.clear() | |
354 | print db.waitget('250') |
|
356 | print db.waitget('250') | |
355 | elif cmd == 'test': |
|
357 | elif cmd == 'test': | |
356 | test() |
|
358 | test() | |
357 | stress() |
|
359 | stress() | |
358 |
|
360 | |||
359 | if __name__== "__main__": |
|
361 | if __name__== "__main__": | |
360 | main() |
|
362 | main() | |
361 |
|
363 | |||
362 |
|
364 |
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