Mercurial > libervia-pubsub

annotate idavoll/memory_backend.py @ 54:62fdb37234e5

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Make NodeCreationService a subclass of backend.NodeCreationService. Implement create_node() in Storage.
author Ralph Meijer <ralphm@ik.nu>
date Fri, 05 Nov 2004 17:05:36 +0000
parents 64f0986d8b35
children 0fa161c00ed9
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1 from twisted.application import service
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2 from twisted.internet import defer
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3 from twisted.protocols.jabber import jid
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4 import backend
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5
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6 class Subscription:
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7 def __init__(self, state):
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8 self.state = state
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9
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10 class NodeConfiguration:
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11 def __init__(self):
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12 self.persist_items = False
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13 self.deliver_payloads = False
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14
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15 class Node:
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16 def __init__(self, id):
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17 self.id = id
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18 self.configuration = NodeConfiguration()
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19 self.subscriptions = {}
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20 self.affiliations = {}
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21 self.items = {}
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22
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23 class Storage:
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24 def __init__(self):
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25 self.nodes = {}
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27 node = Node("ralphm/mood/ralphm@ik.nu")
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28 node.subscriptions["ralphm@doe.ik.nu"] = Subscription("subscribed")
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29 node.subscriptions["notify@ik.nu/mood_monitor"] = Subscription("subscribed")
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30 node.affiliations["ralphm@ik.nu"] = "owner"
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31 node.affiliations["ralphm@doe.ik.nu"] = "publisher"
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32 node.configuration.persist_items = True
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33 node.configuration.deliver_payloads = True
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34 self.nodes[node.id] = node
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35
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36 def get_node_configuration(self, node_id):
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37 try:
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38 node = self.nodes[node_id]
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39 except KeyError:
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40 raise backend.NodeNotFound
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41 else:
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42 c = self.nodes[node_id].configuration
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43 return defer.succeed({'persist_items': c.persist_items,
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44 'deliver_payloads': c.deliver_payloads})
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45
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46 def get_affiliation(self, node_id, entity):
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47 try:
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48 node = self.nodes[node_id]
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49 except KeyError:
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50 raise backend.NodeNotFound
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51 else:
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52 return defer.succeed(node.affiliations.get(entity, None))
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53
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54 def get_subscribers(self, node_id):
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55 try:
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56 node = self.nodes[node_id]
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57 except KeyError:
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58 raise backend.NodeNotFound
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59 else:
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60 subscriptions = self.nodes[node_id].subscriptions
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61 subscribers = [s for s in subscriptions
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62 if subscriptions[s].state == 'subscribed']
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63 return defer.succeed(subscribers)
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64
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65 def store_items(self, node_id, items, publisher):
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66 for item in items:
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67 self.nodes[node_id].items[item["id"]] = (item, publisher)
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68 return defer.succeed(None)
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70 def add_subscription(self, node_id, subscriber, state):
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71 try:
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72 node = self.nodes[node_id]
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73 except KeyError:
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74 raise backend.NodeNotFound
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75
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76 try:
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77 subscription = node.subscriptions[subscriber]
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78 except:
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79 subscription = Subscription(state)
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80 node.subscriptions[subscriber] = subscription
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81
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82 return defer.succeed({'node': node_id,
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83 'jid': subscriber,
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84 'subscription': subscription.state})
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85
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86 def remove_subscription(self, node_id, subscriber):
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87 try:
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88 node = self.nodes[node_id]
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89 except KeyError:
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90 raise backend.NodeNotFound
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91
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92 try:
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93 del node.subscriptions[subscriber]
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94 except KeyError:
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95 raise backend.NotSubscribed
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96
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97 return defer.succeed(None)
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98
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99 def create_node(self, node_id, owner):
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100 if node_id in self.nodes:
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101 raise backend.NodeExists
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102
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103 node = Node(node_id)
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104 node.affiliations[owner] = 'owner'
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105 self.nodes[node_id] = node
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106
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107 return defer.succeed(None)
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108
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109 class BackendService(backend.BackendService):
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110 pass
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111
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112 class NodeCreationService(backend.NodeCreationService):
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113 pass
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114
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115 class PublishService(backend.PublishService):
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116 pass
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117
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118 class NotificationService(backend.NotificationService):
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119 pass
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120
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121 class SubscriptionService(backend.SubscriptionService):
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122 pass