Mercurial > libervia-pubsub
annotate idavoll/memory_storage.py @ 150:35977eb964e6
Use uuid.py module [1] for generating unique id's for nodes and items.
Factor out authorization checking.
[1] http://ofxsuite.berlios.de/uuid.py
| author | Ralph Meijer <ralphm@ik.nu> |
|---|---|
| date | Tue, 04 Oct 2005 12:17:01 +0000 |
| parents | b03e5ad81173 |
| children | 5191ba7c4df8 |
| rev | line source |
|---|---|
| 107 | 1 import copy |
| 2 from zope.interface import implements | |
| 3 from twisted.internet import defer | |
| 4 from twisted.words.protocols.jabber import jid | |
| 5 import storage | |
| 6 | |
| 115 | 7 default_config = {"pubsub#persist_items": True, |
| 8 "pubsub#deliver_payloads": True} | |
| 107 | 9 |
| 10 class Storage: | |
| 11 | |
| 12 implements(storage.IStorage) | |
| 13 | |
| 14 def __init__(self): | |
| 15 self._nodes = {} | |
| 16 | |
| 17 def get_node(self, node_id): | |
| 18 try: | |
| 19 node = self._nodes[node_id] | |
| 20 except KeyError: | |
| 21 return defer.fail(storage.NodeNotFound()) | |
| 22 | |
| 23 return defer.succeed(node) | |
| 24 | |
| 25 def get_node_ids(self): | |
| 26 return defer.succeed(self._nodes.keys()) | |
| 27 | |
| 28 def create_node(self, node_id, owner, config = None, type='leaf'): | |
| 29 if node_id in self._nodes: | |
| 30 return defer.fail(storage.NodeExists()) | |
| 31 | |
| 32 if not config: | |
| 33 config = copy.copy(default_config) | |
| 34 | |
| 35 if type != 'leaf': | |
| 36 raise NotImplementedError | |
| 37 | |
| 38 node = LeafNode(node_id, owner, config) | |
| 39 self._nodes[node_id] = node | |
| 40 | |
| 41 return defer.succeed(None) | |
| 42 | |
| 43 def delete_node(self, node_id): | |
| 44 try: | |
| 45 del self._nodes[node_id] | |
| 46 except KeyError: | |
| 47 return defer.fail(storage.NodeNotFound()) | |
| 48 | |
| 49 return defer.succeed(None) | |
| 50 | |
| 51 def get_affiliations(self, entity): | |
| 112 | 52 entity = entity.userhost() |
| 53 return defer.succeed([(node.id, node._affiliations[entity]) | |
| 107 | 54 for name, node in self._nodes.iteritems() |
| 112 | 55 if entity in node._affiliations]) |
| 107 | 56 |
| 57 def get_subscriptions(self, entity): | |
| 58 subscriptions = [] | |
| 59 for node in self._nodes.itervalues(): | |
| 60 for subscriber, subscription in node._subscriptions.iteritems(): | |
|
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61 subscriber = jid.internJID(subscriber) |
| 112 | 62 if subscriber.userhostJID() == entity.userhostJID(): |
| 107 | 63 subscriptions.append((node.id, subscriber, |
| 64 subscription.state)) | |
| 65 | |
| 66 return defer.succeed(subscriptions) | |
| 67 | |
| 68 class Node: | |
| 69 | |
| 70 implements(storage.INode) | |
| 71 | |
| 72 def __init__(self, node_id, owner, config): | |
| 73 self.id = node_id | |
| 112 | 74 self._affiliations = {owner.userhost(): 'owner'} |
| 107 | 75 self._subscriptions = {} |
| 76 self._config = config | |
| 77 | |
| 78 def get_type(self): | |
| 79 return self.type | |
| 80 | |
| 81 def get_configuration(self): | |
| 82 return self._config | |
| 83 | |
| 84 def get_meta_data(self): | |
| 85 config = copy.copy(self._config) | |
| 86 config["pubsub#node_type"] = self.type | |
| 87 return config | |
| 88 | |
| 89 def set_configuration(self, options): | |
| 90 for option in options: | |
| 91 if option in self._config: | |
| 92 self._config[option] = options[option] | |
| 93 | |
| 94 return defer.succeed(None) | |
| 95 | |
| 96 def get_affiliation(self, entity): | |
| 97 return defer.succeed(self._affiliations.get(entity.full())) | |
| 98 | |
|
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99 def get_subscription(self, subscriber): |
| 107 | 100 try: |
| 101 subscription = self._subscriptions[subscriber.full()] | |
|
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102 except KeyError: |
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103 state = None |
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104 else: |
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105 state = subscription.state |
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106 return defer.succeed(state) |
| 107 | 107 |
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108 def add_subscription(self, subscriber, state): |
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109 if self._subscriptions.get(subscriber.full()): |
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110 return defer.fail(storage.SubscriptionExists()) |
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111 |
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112 subscription = Subscription(state) |
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113 self._subscriptions[subscriber.full()] = subscription |
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114 return defer.succeed(None) |
| 107 | 115 |
| 116 def remove_subscription(self, subscriber): | |
|
120
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117 try: |
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118 del self._subscriptions[subscriber.full()] |
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119 except KeyError: |
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120 return defer.fail(storage.SubscriptionNotFound()) |
| 107 | 121 |
| 122 return defer.succeed(None) | |
| 123 | |
| 124 def get_subscribers(self): | |
|
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125 subscribers = [jid.internJID(subscriber) for subscriber, subscription |
| 107 | 126 in self._subscriptions.iteritems() |
| 127 if subscription.state == 'subscribed'] | |
| 128 | |
| 129 return defer.succeed(subscribers) | |
| 130 | |
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131 def is_subscribed(self, entity): |
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132 for subscriber, subscription in self._subscriptions.iteritems(): |
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133 if jid.internJID(subscriber).userhost() == entity.userhost() and \ |
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134 subscription.state == 'subscribed': |
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135 return defer.succeed(True) |
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136 |
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137 return defer.succeed(False) |
| 107 | 138 |
|
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139 def get_affiliations(self): |
|
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140 affiliations = [(jid.internJID(entity), affiliation) for entity, affiliation |
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141 in self._affiliations.iteritems()] |
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142 |
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143 return defer.succeed(affiliations) |
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144 |
|
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145 class LeafNodeMixin: |
| 107 | 146 |
| 147 type = 'leaf' | |
| 148 | |
|
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149 def __init__(self): |
| 107 | 150 self._items = {} |
| 151 self._itemlist = [] | |
| 152 | |
| 153 def store_items(self, items, publisher): | |
| 154 for data in items: | |
| 155 id = data["id"] | |
|
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156 data = data.toXml() |
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157 if isinstance(data, str): |
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158 data = data.decode('utf-8') |
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159 item = (data, publisher) |
| 107 | 160 if id in self._items: |
| 161 self._itemlist.remove(self._items[id]) | |
| 162 self._items[id] = item | |
| 163 self._itemlist.append(item) | |
| 164 | |
| 165 return defer.succeed(None) | |
| 166 | |
| 167 def remove_items(self, item_ids): | |
| 168 deleted = [] | |
| 169 | |
| 170 for item_id in item_ids: | |
|
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171 try: |
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172 item = self._items[item_id] |
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173 except KeyError: |
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174 pass |
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175 else: |
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176 self._itemlist.remove(item) |
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177 del self._items[item_id] |
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178 deleted.append(item_id) |
| 107 | 179 |
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180 return defer.succeed(deleted) |
| 107 | 181 |
| 182 def get_items(self, max_items=None): | |
| 183 if max_items: | |
| 184 list = self._itemlist[-max_items:] | |
| 185 else: | |
| 186 list = self._itemlist | |
|
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187 return defer.succeed([item[0] for item in list]) |
| 107 | 188 |
| 189 def get_items_by_id(self, item_ids): | |
| 190 items = [] | |
| 191 for item_id in item_ids: | |
| 192 try: | |
| 193 item = self._items[item_id] | |
| 194 except KeyError: | |
| 195 pass | |
| 196 else: | |
|
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197 items.append(item[0]) |
| 107 | 198 return defer.succeed(items) |
| 199 | |
| 200 def purge(self): | |
| 201 self._items = {} | |
| 202 self._itemlist = [] | |
| 203 | |
| 204 return defer.succeed(None) | |
| 205 | |
|
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206 class LeafNode(Node, LeafNodeMixin): |
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207 |
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208 implements(storage.ILeafNode) |
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209 |
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210 def __init__(self, node_id, owner, config): |
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211 Node.__init__(self, node_id, owner, config) |
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212 LeafNodeMixin.__init__(self) |
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213 |
| 107 | 214 class Subscription: |
| 215 | |
| 216 implements(storage.ISubscription) | |
| 217 | |
| 218 def __init__(self, state): | |
| 219 self.state = state |