Mercurial > libervia-pubsub

annotate idavoll/pgsql_backend.py @ 44:bc7438476a67

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Removed IPersistenceService, this is a feature of the storage facility. Moved implementation of backend services to their own class, matching the interfaces.
author Ralph Meijer <ralphm@ik.nu>
date Wed, 03 Nov 2004 14:03:41 +0000
parents 9685b7e291ef
children 4447b3c5b857
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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 from twisted.enterprise import adbapi
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5 import backend
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6
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7 class Storage:
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8 def __init__(self, user, database):
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9 self.dbpool = adbapi.ConnectionPool('pyPgSQL.PgSQL', user=user,
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10 database=database)
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11
41
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12 def _get_node_configuration(self, cursor, node_id):
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13 configuration = {}
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14 cursor.execute("""SELECT persistent, deliver_payload FROM nodes
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15 WHERE node=%s""",
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16 (node_id,))
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17 try:
41
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18 (configuration["persist_items"],
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19 configuration["deliver_payloads"]) = cursor.fetchone()
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20 return configuration
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21 except TypeError:
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22 raise backend.NodeNotFound
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23
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24 def get_node_configuration(self, node_id):
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25 return self.dbpool.runInteraction(self._get_node_configuration, node_id)
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26
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27 def _get_affiliation(self, cursor, node_id, entity):
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28 cursor.execute("""SELECT affiliation FROM affiliations
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29 JOIN nodes ON (node_id=nodes.id)
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30 JOIN entities ON (entity_id=entities.id)
41
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31 WHERE node=%s AND jid=%s""",
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32 (node_id.encode('utf8'), entity.encode('utf8')))
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33
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34 try:
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35 return cursor.fetchone()[0]
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36 except TypeError:
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37 return None
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38
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39 def get_affiliation(self, node_id, entity):
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40 return self.dbpool.runInteraction(self._get_affiliation, node_id,
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41 entity)
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42
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43 def get_subscribers(self, node_id):
43
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44 d = self.dbpool.runQuery("""SELECT jid, resource FROM subscriptions
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45 JOIN nodes ON (node_id=nodes.id)
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46 JOIN entities ON (entity_id=entities.id)
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47 WHERE node=%s AND
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48 subscription='subscribed'""",
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49 (node_id.encode('utf8'),))
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50 d.addCallback(self._convert_to_jids)
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51 return d
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52
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53 def _convert_to_jids(self, list):
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54 return [jid.JID("%s/%s" % (l[0], l[1])).full() for l in list]
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56 def store_items(self, node_id, items, publisher):
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57 return self.dbpool.runInteraction(self._store_items, node_id, items,
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58 publisher)
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59
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60 def _store_items(self, cursor, node_id, items, publisher):
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61 for item in items:
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62 self._store_item(cursor, node_id, item, publisher)
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63
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64 def _store_item(self, cursor, node_id, item, publisher):
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65 data = item.toXml()
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66 cursor.execute("""UPDATE items SET publisher=%s, data=%s
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67 FROM nodes
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68 WHERE nodes.id = items.node_id AND
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69 nodes.node = %s and items.item=%s""",
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70 (publisher.encode('utf8'),
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71 data.encode('utf8'),
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72 node_id.encode('utf8'),
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73 item["id"].encode('utf8')))
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74 if cursor.rowcount == 1:
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75 return
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76
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77 cursor.execute("""INSERT INTO items (node_id, item, publisher, data)
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78 SELECT id, %s, %s, %s FROM nodes WHERE node=%s""",
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79 (item["id"].encode('utf8'),
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80 publisher.encode('utf8'),
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81 data.encode('utf8'),
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82 node_id.encode('utf8')))
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83
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84 class BackendService(backend.BackendService):
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85 """ PostgreSQL backend Service for a JEP-0060 pubsub service """
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86
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87 class PublishService(service.Service):
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88
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89 __implements__ = backend.IPublishService,
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90
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91 def publish(self, node_id, items, requestor):
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92 return self.parent.publish(node_id, items, requestor)
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93
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94 class NotificationService(backend.NotificationService):
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95
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96 __implements__ = backend.INotificationService,
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97
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98 def get_notification_list(self, node_id, items):
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99 return self.parent.get_notification_list(node_id, items)
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100
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101 class PersistenceService(service.Service):
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102
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103 __implements__ = backend.IPersistenceService,
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104
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105 def store_items(self, node_id, items, publisher):
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106 return self.parent.store_items(node_id, items, publisher)