Mercurial > libervia-pubsub

annotate idavoll/backend.py @ 92:878a5b7697f2

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Consume errors in DeferredLists.
author Ralph Meijer <ralphm@ik.nu>
date Wed, 17 Nov 2004 21:00:03 +0000
parents 59378610b16e
children 3ad74552bbc7
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49
94e4ede2a357 Implement SubscriptionService with separate storage.
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1 from twisted.protocols.jabber import jid
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2 from twisted.python import components
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3 from twisted.application import service
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4 from twisted.xish import utility
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5 from twisted.internet import defer
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6 import sha
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7 import time
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8
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9 class Error(Exception):
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10 msg = ''
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11
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12 def __str__(self):
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13 return self.msg
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14
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15 class NodeNotFound(Error):
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16 msg = 'Node not found'
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18 class NotAuthorized(Error):
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19 pass
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eddea65d1032 Added two exceptions: NoInstantNodes and NodeExists.
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20
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21 class PayloadExpected(Error):
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22 msg = 'Payload expected'
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46cd13c68ac0 Redone memory storage of nodes.
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23
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24 class NoPayloadAllowed(Error):
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25 msg = 'No payload allowed'
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27 class NoInstantNodes(Error):
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28 pass
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884268687229 Simplify call chain by mapping incoming requests directly to method
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30 class NodeExists(Error):
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31 pass
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32
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33 class NotImplemented(Error):
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34 pass
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35
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36 class NotSubscribed(Error):
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37 pass
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38
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39 class IBackendService(components.Interface):
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40 """ Interface to a backend service of a pubsub service. """
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41
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42 def get_supported_affiliations(self):
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43 """ Reports the list of supported affiliation types.
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44
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45 @return: a list of supported affiliation types.
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46 """
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47
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48 class INodeCreationService(components.Interface):
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49 """ A service for creating nodes """
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50
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51 def create_node(self, node_id, requestor):
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52 """ Create a node.
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53
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54 @return: a deferred that fires when the node has been created.
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55 """
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56
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57 class INodeDeletionService(components.Interface):
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58 """ A service for deleting nodes. """
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59
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60 def register_pre_delete(self, pre_delete_fn):
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61 """ Register a callback that is called just before a node deletion.
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62
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63 The function C{pre_deleted_fn} is added to a list of functions
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64 to be called just before deletion of a node. The callback
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65 C{pre_delete_fn} is called with the C{node_id} that is about to be
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66 deleted and should return a deferred that returns a list of deferreds
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67 that are to be fired after deletion. The backend collects the lists
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68 from all these callbacks before actually deleting the node in question.
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69 After deletion all collected deferreds are fired to do post-processing.
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70
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71 The idea is that you want to be able to collect data from the
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72 node before deleting it, for example to get a list of subscribers
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73 that have to be notified after the node has been deleted. To do this,
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74 C{pre_delete_fn} fetches the subscriber list and passes this
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75 list to a callback attached to a deferred that it sets up. This
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76 deferred is returned in the list of deferreds.
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77 """
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78
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79 def get_subscribers(self, node_id):
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80 """ Get node subscriber list.
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81
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82 @return: a deferred that fires with the list of subscribers.
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83 """
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84
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85 def delete_node(self, node_id, requestor):
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86 """ Delete a node.
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87
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88 @return: a deferred that fires when the node has been deleted.
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89 """
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90
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91 class IPublishService(components.Interface):
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92 """ A service for publishing items to a node. """
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93
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94 def publish(self, node_id, items, requestor):
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95 """ Publish items to a pubsub node.
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96
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97 @return: a deferred that fires when the items have been published.
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98 """
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99 class INotificationService(components.Interface):
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100 """ A service for notification of published items. """
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101
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102 def register_notifier(self, observerfn, *args, **kwargs):
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103 """ Register callback which is called for notification. """
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104
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105 def get_notification_list(self, node_id, items):
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106 pass
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107
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108 class ISubscriptionService(components.Interface):
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109 """ A service for managing subscriptions. """
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110
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111 def subscribe(self, node_id, subscriber, requestor):
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112 """ Request the subscription of an entity to a pubsub node.
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113
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114 Depending on the node's configuration and possible business rules, the
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115 C{subscriber} is added to the list of subscriptions of the node with id
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116 C{node_id}. The C{subscriber} might be different from the C{requestor},
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117 and if the C{requestor} is not allowed to subscribe this entity an
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118 exception should be raised.
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119
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120 @return: a deferred that returns the subscription state
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121 """
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122
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123 def unsubscribe(self, node_id, subscriber, requestor):
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124 """ Cancel the subscription of an entity to a pubsub node.
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125
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126 The subscription of C{subscriber} is removed from the list of
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127 subscriptions of the node with id C{node_id}. If the C{requestor}
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128 is not allowed to unsubscribe C{subscriber}, an an exception should
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129 be raised.
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130
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131 @return: a deferred that fires when unsubscription is complete.
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132 """
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133
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134 class IAffiliationsService(components.Interface):
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135 """ A service for retrieving the affiliations with this pubsub service. """
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136
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137 def get_affiliations(self, entity):
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138 """ Report the list of current affiliations with this pubsub service.
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139
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140 Report the list of the current affiliations with all nodes within this
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141 pubsub service, along with subscriptions to such nodes, for the
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142 C{entity}.
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143
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144 @return: a deferred that returns the list of all current affiliations
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145 and subscriptions.
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146 """
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147
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148 class IRetractionService(components.Interface):
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149 """ A service for retracting published items """
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150
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151 def retract_item(self, node_id, item_id, requestor):
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152 """ Removes item in node from persistent storage """
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153
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154 def purge_node(self, node_id, requestor):
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155 """ Removes all items in node from persistent storage """
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156
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157 class IItemRetrievalService(components.Interface):
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158 """ A service for retrieving previously published items. """
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159
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160 def get_items(self, node_id, requestor, max_items=None, item_ids=[]):
29
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161 """ Retrieve items from persistent storage
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162
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163 If C{max_items} is given, return the C{max_items} last published
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164 items, else if C{item_ids} is not empty, return the items requested.
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165 If neither is given, return all items.
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166
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167 @return: a deferred that returns the requested items
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168 """
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169
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170 class BackendService(service.MultiService, utility.EventDispatcher):
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171
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172 __implements__ = IBackendService,
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173
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174 def __init__(self, storage):
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175 service.MultiService.__init__(self)
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176 utility.EventDispatcher.__init__(self)
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177 self.storage = storage
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178
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179 def supports_publisher_affiliation(self):
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180 return True
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181
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182 def supports_outcast_affiliation(self):
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183 return True
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184
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185 def supports_persistent_items(self):
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186 return True
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187
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188 def get_node_type(self, node_id):
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189 return self.storage.get_node_type(node_id)
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190
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191 def get_nodes(self):
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192 return self.storage.get_nodes()
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193
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194 class PublishService(service.Service):
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195
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196 __implements__ = IPublishService,
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197
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198 def publish(self, node_id, items, requestor):
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199 d1 = self.parent.storage.get_node_configuration(node_id)
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200 d2 = self.parent.storage.get_affiliation(node_id, requestor)
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201 d = defer.DeferredList([d1, d2], fireOnOneErrback=1, consumeErrors=1)
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202 d.addErrback(lambda x: x.value[0])
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203 d.addCallback(self._do_publish, node_id, items, requestor)
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204 return d
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205
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206 def _do_publish(self, result, node_id, items, requestor):
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207 configuration = result[0][1]
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208 persist_items = configuration["persist_items"]
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209 deliver_payloads = configuration["deliver_payloads"]
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210 affiliation = result[1][1]
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211
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212 if affiliation not in ['owner', 'publisher']:
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213 raise NotAuthorized
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214
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215 if items and not persist_items and not deliver_payloads:
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216 raise NoPayloadAllowed
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217 elif not items and (persist_items or deliver_payloads):
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218 raise PayloadExpected
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219
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220 print "publish by %s to %s" % (requestor.full(), node_id)
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221
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222 if persist_items or deliver_payloads:
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223 for item in items:
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224 if not item.getAttribute("id"):
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225 item["id"] = sha.new(str(time.time()) +
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226 requestor.full()).hexdigest()
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227
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228 if persist_items:
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229 d = self.parent.storage.store_items(node_id, items,
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230 requestor)
43
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231 else:
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232 d = defer.succeed(None)
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233
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234 d.addCallback(self._do_notify, node_id, items, deliver_payloads)
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235
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236 def _do_notify(self, result, node_id, items, deliver_payloads):
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237 if items and not deliver_payloads:
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238 for item in items:
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239 item.children = []
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240
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241 self.parent.dispatch({ 'items': items, 'node_id': node_id },
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242 '//event/pubsub/notify')
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243
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244 class NotificationService(service.Service):
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245
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246 __implements__ = INotificationService,
43
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247
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248 def get_notification_list(self, node_id, items):
44
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249 d = self.parent.storage.get_subscribers(node_id)
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250 d.addCallback(self._magic_filter, node_id, items)
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251 return d
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252
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253 def _magic_filter(self, subscribers, node_id, items):
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254 list = {}
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255 for subscriber in subscribers:
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256 list[subscriber] = items
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257 return list
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258
29
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259 def register_notifier(self, observerfn, *args, **kwargs):
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260 self.parent.addObserver('//event/pubsub/notify', observerfn,
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261 *args, **kwargs)
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262
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263 class SubscriptionService(service.Service):
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264
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265 __implements__ = ISubscriptionService,
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266
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267 def subscribe(self, node_id, subscriber, requestor):
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268 if subscriber.userhostJID() != requestor:
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269 raise NotAuthorized
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270
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271 d1 = self.parent.storage.get_node_configuration(node_id)
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272 d2 = self.parent.storage.get_affiliation(node_id, subscriber)
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273 d = defer.DeferredList([d1, d2], fireOnOneErrback=1, consumeErrors=1)
49
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274 d.addErrback(lambda x: x.value[0])
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275 d.addCallback(self._do_subscribe, node_id, subscriber)
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276 return d
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277
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278 def _do_subscribe(self, result, node_id, subscriber):
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279 configuration = result[0][1]
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280 affiliation = result[1][1]
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281
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282 if affiliation == 'outcast':
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283 raise NotAuthorized
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284
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285 d = self.parent.storage.add_subscription(node_id, subscriber,
49
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diff changeset
286 'subscribed')
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287 d.addCallback(self._return_subscription, affiliation)
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288 return d
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289
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290 def _return_subscription(self, result, affiliation):
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291 result['affiliation'] = affiliation
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292 return result
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293
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
294 def unsubscribe(self, node_id, subscriber, requestor):
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
295 if subscriber.userhostJID() != requestor:
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
296 raise NotAuthorized
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
297
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
298 d = self.parent.storage.get_node_configuration(node_id)
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
299 d.addCallback(self._do_unsubscribe, node_id, subscriber)
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
300 return d
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
301
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
302 def _do_unsubscribe(self, result, node_id, subscriber):
94e4ede2a357 Implement SubscriptionService with separate storage.
Ralph Meijer <ralphm@ik.nu>
parents: 44
diff changeset
303 return self.parent.storage.remove_subscription(node_id,
59
0fa161c00ed9 Use jid.JIDs everywhere in the backend.
Ralph Meijer <ralphm@ik.nu>
parents: 53
diff changeset
304 subscriber)
53
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
305
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
306 class NodeCreationService(service.Service):
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
307
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
308 __implements__ = INodeCreationService,
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
309
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
310 def supports_instant_nodes(self):
84
34be83a0bd2e Implement instant nodes.
Ralph Meijer <ralphm@ik.nu>
parents: 80
diff changeset
311 return True
53
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
312
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
313 def create_node(self, node_id, requestor):
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
314 if not node_id:
84
34be83a0bd2e Implement instant nodes.
Ralph Meijer <ralphm@ik.nu>
parents: 80
diff changeset
315 node_id = 'generic/%s' % sha.new(str(time.time()) +
34be83a0bd2e Implement instant nodes.
Ralph Meijer <ralphm@ik.nu>
parents: 80
diff changeset
316 requestor.full()).hexdigest()
53
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
317
59
0fa161c00ed9 Use jid.JIDs everywhere in the backend.
Ralph Meijer <ralphm@ik.nu>
parents: 53
diff changeset
318 d = self.parent.storage.create_node(node_id, requestor)
53
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
319 d.addCallback(lambda _: node_id)
e602ddda2d6e Implement NodeCreationService, using the create_node() method of Storage.
Ralph Meijer <ralphm@ik.nu>
parents: 49
diff changeset
320 return d
61
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
321
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
322 class AffiliationsService(service.Service):
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
323
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
324 __implements__ = IAffiliationsService,
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
325
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
326 def get_affiliations(self, entity):
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
327 d1 = self.parent.storage.get_affiliations(entity)
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
328 d2 = self.parent.storage.get_subscriptions(entity)
92
878a5b7697f2 Consume errors in DeferredLists.
Ralph Meijer <ralphm@ik.nu>
parents: 90
diff changeset
329 d = defer.DeferredList([d1, d2], fireOnOneErrback=1, consumeErrors=1)
61
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
330 d.addErrback(lambda x: x.value[0])
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
331 d.addCallback(self._affiliations_result, entity)
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
332 return d
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
333
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
334 def _affiliations_result(self, result, entity):
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
335 affiliations = result[0][1]
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
336 subscriptions = result[1][1]
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
337
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
338 new_affiliations = {}
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
339
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
340 for node, affiliation in affiliations:
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
341 new_affiliations[(node, entity.full())] = {'node': node,
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
342 'jid': entity,
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
343 'affiliation': affiliation,
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
344 'subscription': None
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
345 }
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
346
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
347 for node, subscriber, subscription in subscriptions:
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
348 key = node, subscriber.full()
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
349 if new_affiliations.has_key(key):
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
350 new_affiliations[key]['subscription'] = subscription
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
351 else:
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
352 new_affiliations[key] = {'node': node,
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
353 'jid': subscriber,
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
354 'affiliation': None,
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
355 'subscription': subscription}
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
356
ad08e021b4d5 Implement AffiliationsService.
Ralph Meijer <ralphm@ik.nu>
parents: 59
diff changeset
357 return new_affiliations.values()
80
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
358
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
359 class ItemRetrievalService(service.Service):
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
360
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
361 __implements__ = IItemRetrievalService
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
362
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
363 def get_items(self, node_id, requestor, max_items=None, item_ids=[]):
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
364 d = self.parent.storage.is_subscribed(node_id, requestor)
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
365 d.addCallback(self._do_get_items, node_id, max_items, item_ids)
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
366 return d
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
367
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
368 def _do_get_items(self, result, node_id, max_items, item_ids):
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
369 def q(r):
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
370 print r
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
371 return r
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
372
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
373 if not result:
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
374 raise NotAuthorized
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
375
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
376 if item_ids:
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
377 d = self.parent.storage.get_items_by_ids(node_id, item_ids)
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
378 d.addCallback(q)
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
379 d.addErrback(q)
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
380 return d
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
381 else:
ec354aab3949 Implemented ItemRetrievalService.
Ralph Meijer <ralphm@ik.nu>
parents: 72
diff changeset
382 return self.parent.storage.get_items(node_id, max_items)
85
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
383
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
384 class RetractionService(service.Service):
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
385
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
386 __implements__ = IRetractionService,
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
387
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
388 def retract_item(self, node_id, item_ids, requestor):
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
389 d1 = self.parent.storage.get_node_configuration(node_id)
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
390 d2 = self.parent.storage.get_affiliation(node_id, requestor)
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
391 d = defer.DeferredList([d1, d2], fireOnOneErrback=1)
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
392 d.addErrback(lambda x: x.value[0])
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
393 d.addCallback(self._do_retract, node_id, item_ids)
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
394 return d
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
395
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
396 def _do_retract(self, result, node_id, item_ids):
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
397 configuration = result[0][1]
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
398 persist_items = configuration["persist_items"]
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
399 affiliation = result[1][1]
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
400
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
401 if affiliation not in ['owner', 'publisher']:
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
402 raise NotAuthorized
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
403
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
404 if not persist_items:
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
405 raise NodeNotPersistent
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
406
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
407 d = self.parent.storage.remove_items(node_id, item_ids)
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
408 d.addCallback(self._do_notify_retraction, node_id)
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
409 return d
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
410
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
411 def _do_notify_retraction(self, result, node_id):
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
412 self.parent.dispatch({ 'item_ids': result, 'node_id': node_id },
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
413 '//event/pubsub/retract')
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
414
ec557449d1aa Implement node retraction, with storage support for pgsql.
Ralph Meijer <ralphm@ik.nu>
parents: 84
diff changeset
415 def purge_node(self, node_id, requestor):
90
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
416 d1 = self.parent.storage.get_node_configuration(node_id)
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
417 d2 = self.parent.storage.get_affiliation(node_id, requestor)
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
418 d = defer.DeferredList([d1, d2], fireOnOneErrback=1)
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
419 d.addErrback(lambda x: x.value[0])
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
420 d.addCallback(self._do_purge, node_id)
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
421 return d
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
422
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
423 def _do_purge(self, result, node_id):
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
424 configuration = result[0][1]
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
425 persist_items = configuration["persist_items"]
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
426 affiliation = result[1][1]
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
427
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
428 if affiliation != 'owner':
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
429 raise NotAuthorized
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
430
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
431 if not persist_items:
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
432 raise NodeNotPersistent
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
433
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
434 d = self.parent.storage.purge_node(node_id)
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
435 d.addCallback(self._do_notify_purge, node_id)
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
436 return d
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
437
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
438 def _do_notify_purge(self, result, node_id):
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
diff changeset
439 self.parent.dispatch(node_id, '//event/pubsub/purge')
59378610b16e Implement node purging and node deletion.
Ralph Meijer <ralphm@ik.nu>
parents: 85
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440
59378610b16e Implement node purging and node deletion.
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441 class NodeDeletionService(service.Service):
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Ralph Meijer <ralphm@ik.nu>
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442
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Ralph Meijer <ralphm@ik.nu>
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443 __implements__ = INodeDeletionService,
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444
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Ralph Meijer <ralphm@ik.nu>
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445 def __init__(self):
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446 self._callback_list = []
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447
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Ralph Meijer <ralphm@ik.nu>
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448 def register_pre_delete(self, pre_delete_fn):
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449 self._callback_list.append(pre_delete_fn)
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450
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451 def get_subscribers(self, node_id):
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452 return self.parent.storage.get_subscribers(node_id)
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Ralph Meijer <ralphm@ik.nu>
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453
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454 def delete_node(self, node_id, requestor):
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455 d1 = self.parent.storage.get_node_configuration(node_id)
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456 d2 = self.parent.storage.get_affiliation(node_id, requestor)
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457 d = defer.DeferredList([d1, d2], fireOnOneErrback=1)
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458 d.addErrback(lambda x: x.value[0])
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459 d.addCallback(self._do_pre_delete, node_id)
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Ralph Meijer <ralphm@ik.nu>
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460 return d
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461
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462 def _do_pre_delete(self, result, node_id):
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Ralph Meijer <ralphm@ik.nu>
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463 configuration = result[0][1]
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464 persist_items = configuration["persist_items"]
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465 affiliation = result[1][1]
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466
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467 if affiliation != 'owner':
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468 raise NotAuthorized
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469
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470 d = defer.DeferredList([cb(node_id) for cb in self._callback_list],
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471 consumeErrors=1)
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472 d.addCallback(self._do_delete, node_id)
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473
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474 def _do_delete(self, result, node_id):
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Ralph Meijer <ralphm@ik.nu>
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475 dl = []
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476 for succeeded, r in result:
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477 if succeeded and r:
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478 dl.extend(r)
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479
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480 d = self.parent.storage.delete_node(node_id)
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481 d.addCallback(self._do_notify_delete, dl)
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482
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483 return d
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484
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Ralph Meijer <ralphm@ik.nu>
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485 def _do_notify_delete(self, result, dl):
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Ralph Meijer <ralphm@ik.nu>
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486 for d in dl:
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487 d.callback(None)