Mercurial > libervia-pubsub
annotate src/memory_storage.py @ 374:40e5edd7ea11
storage: changed items order:
items were so far ordered by item_id, i.e. by order of creation.
This has been changed to order them by date of last update, so an item overwritting an old one appears on top (with former behaviour, it was staying at the same place).
The XEP is not clear on that, but this seems more in correct with § 6.5.7 which says "implementations SHOULD return the N most recent (as opposed to the N oldest) items".
author | Goffi <goffi@goffi.org> |
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date | Thu, 03 Jan 2019 20:31:03 +0100 |
parents | dabee42494ac |
children | aa3a464df605 |
rev | line source |
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233 | 1 #!/usr/bin/python |
2 #-*- coding: utf-8 -*- | |
3 | |
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4 # Copyright (c) 2003-2011 Ralph Meijer |
368 | 5 # Copyright (c) 2012-2018 Jérôme Poisson |
233 | 6 |
7 | |
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8 # This program is free software: you can redistribute it and/or modify |
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9 # it under the terms of the GNU Affero General Public License as published by |
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10 # the Free Software Foundation, either version 3 of the License, or |
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11 # (at your option) any later version. |
233 | 12 |
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13 # This program is distributed in the hope that it will be useful, |
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 # GNU Affero General Public License for more details. |
233 | 17 |
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18 # You should have received a copy of the GNU Affero General Public License |
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19 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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20 # -- |
233 | 21 |
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22 # This program is based on Idavoll (http://idavoll.ik.nu/), |
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23 # originaly written by Ralph Meijer (http://ralphm.net/blog/) |
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24 # It is sublicensed under AGPL v3 (or any later version) as allowed by the original |
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25 # license. |
233 | 26 |
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27 # -- |
233 | 28 |
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29 # Here is a copy of the original license: |
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30 |
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31 # Copyright (c) 2003-2011 Ralph Meijer |
233 | 32 |
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33 # Permission is hereby granted, free of charge, to any person obtaining |
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34 # a copy of this software and associated documentation files (the |
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35 # "Software"), to deal in the Software without restriction, including |
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36 # without limitation the rights to use, copy, modify, merge, publish, |
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37 # distribute, sublicense, and/or sell copies of the Software, and to |
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38 # permit persons to whom the Software is furnished to do so, subject to |
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39 # the following conditions: |
233 | 40 |
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41 # The above copyright notice and this permission notice shall be |
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42 # included in all copies or substantial portions of the Software. |
233 | 43 |
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44 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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45 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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46 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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47 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
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48 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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49 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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50 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
233 | 51 |
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52 |
107 | 53 import copy |
54 from zope.interface import implements | |
55 from twisted.internet import defer | |
56 from twisted.words.protocols.jabber import jid | |
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57 |
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58 from wokkel.pubsub import Subscription |
107 | 59 |
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60 from sat_pubsub import error, iidavoll |
107 | 61 |
62 class Storage: | |
63 | |
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64 implements(iidavoll.IStorage) |
107 | 65 |
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66 defaultConfig = { |
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67 'leaf': { |
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68 "pubsub#persist_items": True, |
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69 "pubsub#deliver_payloads": True, |
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70 "pubsub#send_last_published_item": 'on_sub', |
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71 }, |
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72 'collection': { |
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73 "pubsub#deliver_payloads": True, |
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74 "pubsub#send_last_published_item": 'on_sub', |
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75 } |
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76 } |
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77 |
107 | 78 def __init__(self): |
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79 rootNode = CollectionNode('', jid.JID('localhost'), |
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80 copy.copy(self.defaultConfig['collection'])) |
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81 self._nodes = {'': rootNode} |
107 | 82 |
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83 |
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84 def getNode(self, nodeIdentifier): |
107 | 85 try: |
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86 node = self._nodes[nodeIdentifier] |
107 | 87 except KeyError: |
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88 return defer.fail(error.NodeNotFound()) |
107 | 89 |
90 return defer.succeed(node) | |
91 | |
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92 |
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93 def getNodeIds(self): |
107 | 94 return defer.succeed(self._nodes.keys()) |
95 | |
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96 |
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97 def createNode(self, nodeIdentifier, owner, config): |
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98 if nodeIdentifier in self._nodes: |
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99 return defer.fail(error.NodeExists()) |
107 | 100 |
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101 if config['pubsub#node_type'] != 'leaf': |
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102 raise error.NoCollections() |
107 | 103 |
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104 node = LeafNode(nodeIdentifier, owner, config) |
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105 self._nodes[nodeIdentifier] = node |
107 | 106 |
107 return defer.succeed(None) | |
108 | |
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109 |
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110 def deleteNode(self, nodeIdentifier): |
107 | 111 try: |
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112 del self._nodes[nodeIdentifier] |
107 | 113 except KeyError: |
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114 return defer.fail(error.NodeNotFound()) |
107 | 115 |
116 return defer.succeed(None) | |
117 | |
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118 |
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119 def getAffiliations(self, entity): |
112 | 120 entity = entity.userhost() |
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121 return defer.succeed([(node.nodeIdentifier, node._affiliations[entity]) |
107 | 122 for name, node in self._nodes.iteritems() |
112 | 123 if entity in node._affiliations]) |
107 | 124 |
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125 |
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126 def getSubscriptions(self, entity): |
107 | 127 subscriptions = [] |
128 for node in self._nodes.itervalues(): | |
129 for subscriber, subscription in node._subscriptions.iteritems(): | |
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130 subscriber = jid.internJID(subscriber) |
112 | 131 if subscriber.userhostJID() == entity.userhostJID(): |
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132 subscriptions.append(subscription) |
107 | 133 |
134 return defer.succeed(subscriptions) | |
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135 |
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136 |
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137 def getDefaultConfiguration(self, nodeType): |
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138 if nodeType == 'collection': |
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139 raise error.NoCollections() |
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140 |
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141 return self.defaultConfig[nodeType] |
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142 |
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143 |
107 | 144 class Node: |
145 | |
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146 implements(iidavoll.INode) |
107 | 147 |
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148 def __init__(self, nodeIdentifier, owner, config): |
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149 self.nodeIdentifier = nodeIdentifier |
112 | 150 self._affiliations = {owner.userhost(): 'owner'} |
107 | 151 self._subscriptions = {} |
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152 self._config = copy.copy(config) |
107 | 153 |
154 | |
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155 def getType(self): |
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156 return self.nodeType |
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157 |
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158 |
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159 def getConfiguration(self): |
107 | 160 return self._config |
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161 |
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162 |
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163 def getMetaData(self): |
107 | 164 config = copy.copy(self._config) |
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165 config["pubsub#node_type"] = self.nodeType |
107 | 166 return config |
167 | |
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168 |
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169 def setConfiguration(self, options): |
107 | 170 for option in options: |
171 if option in self._config: | |
172 self._config[option] = options[option] | |
173 | |
174 return defer.succeed(None) | |
171
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175 |
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176 |
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177 def getAffiliation(self, entity): |
226
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178 return defer.succeed(self._affiliations.get(entity.userhost())) |
107 | 179 |
198
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180 |
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181 def getSubscription(self, subscriber): |
107 | 182 try: |
183 subscription = self._subscriptions[subscriber.full()] | |
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184 except KeyError: |
206
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185 return defer.succeed(None) |
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186 else: |
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187 return defer.succeed(subscription) |
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189 |
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190 def getSubscriptions(self, state=None): |
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191 return defer.succeed( |
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192 [subscription |
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193 for subscription in self._subscriptions.itervalues() |
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194 if state is None or subscription.state == state]) |
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195 |
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196 |
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197 |
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198 def addSubscription(self, subscriber, state, options): |
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199 if self._subscriptions.get(subscriber.full()): |
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200 return defer.fail(error.SubscriptionExists()) |
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201 |
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202 subscription = Subscription(self.nodeIdentifier, subscriber, state, |
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203 options) |
120
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204 self._subscriptions[subscriber.full()] = subscription |
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205 return defer.succeed(None) |
107 | 206 |
198
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207 |
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208 def removeSubscription(self, subscriber): |
120
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209 try: |
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210 del self._subscriptions[subscriber.full()] |
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211 except KeyError: |
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212 return defer.fail(error.NotSubscribed()) |
107 | 213 |
214 return defer.succeed(None) | |
215 | |
198
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216 |
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217 def isSubscribed(self, entity): |
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218 for subscriber, subscription in self._subscriptions.iteritems(): |
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219 if jid.internJID(subscriber).userhost() == entity.userhost() and \ |
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220 subscription.state == 'subscribed': |
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221 return defer.succeed(True) |
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222 |
146
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223 return defer.succeed(False) |
107 | 224 |
198
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225 |
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226 def getAffiliations(self): |
148
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227 affiliations = [(jid.internJID(entity), affiliation) for entity, affiliation |
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228 in self._affiliations.iteritems()] |
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229 |
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230 return defer.succeed(affiliations) |
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231 |
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232 |
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233 |
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234 class PublishedItem(object): |
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235 """ |
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236 A published item. |
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237 |
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238 This represent an item as it was published by an entity. |
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239 |
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240 @ivar element: The DOM representation of the item that was published. |
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241 @type element: L{Element<twisted.words.xish.domish.Element>} |
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242 @ivar publisher: The entity that published the item. |
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243 @type publisher: L{JID<twisted.words.protocols.jabber.jid.JID>} |
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244 """ |
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245 |
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246 def __init__(self, element, publisher): |
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247 self.element = element |
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248 self.publisher = publisher |
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249 |
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250 |
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251 |
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252 class LeafNode(Node): |
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253 |
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254 implements(iidavoll.ILeafNode) |
107 | 255 |
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256 nodeType = 'leaf' |
107 | 257 |
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258 def __init__(self, nodeIdentifier, owner, config): |
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259 Node.__init__(self, nodeIdentifier, owner, config) |
107 | 260 self._items = {} |
261 self._itemlist = [] | |
262 | |
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263 |
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264 def storeItems(self, item_data, publisher): |
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265 for access_model, item_config, element in item_data: |
202
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266 item = PublishedItem(element, publisher) |
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267 itemIdentifier = element["id"] |
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268 if itemIdentifier in self._items: |
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269 self._itemlist.remove(self._items[itemIdentifier]) |
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270 self._items[itemIdentifier] = item |
107 | 271 self._itemlist.append(item) |
272 | |
273 return defer.succeed(None) | |
274 | |
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275 |
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276 def removeItems(self, itemIdentifiers): |
107 | 277 deleted = [] |
278 | |
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279 for itemIdentifier in itemIdentifiers: |
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280 try: |
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281 item = self._items[itemIdentifier] |
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282 except KeyError: |
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283 pass |
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284 else: |
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285 self._itemlist.remove(item) |
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286 del self._items[itemIdentifier] |
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287 deleted.append(itemIdentifier) |
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288 |
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289 return defer.succeed(deleted) |
107 | 290 |
198
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291 |
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292 def getItems(self, authorized_groups, unrestricted, maxItems=None): |
297
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293 if maxItems is not None: |
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294 itemList = self._itemlist[-maxItems:] |
107 | 295 else: |
202
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296 itemList = self._itemlist |
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297 return defer.succeed([item.element for item in itemList]) |
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298 |
198
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299 |
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300 def getItemsById(self, authorized_groups, unrestricted, itemIdentifiers): |
107 | 301 items = [] |
198
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302 for itemIdentifier in itemIdentifiers: |
107 | 303 try: |
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304 item = self._items[itemIdentifier] |
107 | 305 except KeyError: |
306 pass | |
307 else: | |
202
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308 items.append(item.element) |
107 | 309 return defer.succeed(items) |
310 | |
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311 |
107 | 312 def purge(self): |
313 self._items = {} | |
314 self._itemlist = [] | |
315 | |
316 return defer.succeed(None) | |
317 | |
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318 |
263
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319 def filterItemsWithPublisher(self, itemIdentifiers, requestor): |
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320 filteredItems = [] |
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321 for itemIdentifier in itemIdentifiers: |
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added the constant FLAG_RETRACT_ALLOW_PUBLISHER to allow a publisher to retract an item he has published in a node of "open" publish model.
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322 try: |
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323 if self._items[itemIdentifier].publisher.userhost() == requestor.userhost(): |
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324 filteredItems.append(self.items[itemIdentifier]) |
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325 except KeyError, AttributeError: |
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326 pass |
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327 return defer.succeed(filteredItems) |
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added the constant FLAG_RETRACT_ALLOW_PUBLISHER to allow a publisher to retract an item he has published in a node of "open" publish model.
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parents:
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328 |
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added the constant FLAG_RETRACT_ALLOW_PUBLISHER to allow a publisher to retract an item he has published in a node of "open" publish model.
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329 |
206
274a45d2a5ab
Implement root collection that includes all leaf nodes.
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330 class CollectionNode(Node): |
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331 nodeType = 'collection' |
204
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332 |
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333 |
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334 |
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335 class GatewayStorage(object): |
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336 """ |
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337 Memory based storage facility for the XMPP-HTTP gateway. |
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338 """ |
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339 |
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340 def __init__(self): |
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341 self.callbacks = {} |
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342 |
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parents:
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diff
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343 |
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344 def addCallback(self, service, nodeIdentifier, callback): |
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345 try: |
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346 callbacks = self.callbacks[service, nodeIdentifier] |
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347 except KeyError: |
364
8bd8be6815ab
completed docstrings + use short notation for sets
Arnaud Joset <info@agayon.be>
parents:
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diff
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348 callbacks = {callback} |
204
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349 self.callbacks[service, nodeIdentifier] = callbacks |
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350 else: |
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351 callbacks.add(callback) |
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diff
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352 pass |
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parents:
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diff
changeset
|
353 |
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354 return defer.succeed(None) |
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diff
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|
355 |
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parents:
202
diff
changeset
|
356 |
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parents:
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diff
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|
357 def removeCallback(self, service, nodeIdentifier, callback): |
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parents:
202
diff
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|
358 try: |
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parents:
202
diff
changeset
|
359 callbacks = self.callbacks[service, nodeIdentifier] |
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Implement storage facilities for the HTTP gateway.
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parents:
202
diff
changeset
|
360 callbacks.remove(callback) |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
361 except KeyError: |
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Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
362 return defer.fail(error.NotSubscribed()) |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
363 else: |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
364 if not callbacks: |
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Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
365 del self.callbacks[service, nodeIdentifier] |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
366 |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
367 return defer.succeed(not callbacks) |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
368 |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
369 |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
370 def getCallbacks(self, service, nodeIdentifier): |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
371 try: |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
372 callbacks = self.callbacks[service, nodeIdentifier] |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
373 except KeyError: |
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Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
374 return defer.fail(error.NoCallbacks()) |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
375 else: |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
376 return defer.succeed(callbacks) |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
377 |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
378 |
b4bf0a5ce50d
Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
379 def hasCallbacks(self, service, nodeIdentifier): |
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Implement storage facilities for the HTTP gateway.
Ralph Meijer <ralphm@ik.nu>
parents:
202
diff
changeset
|
380 return defer.succeed((service, nodeIdentifier) in self.callbacks) |