Offline Message Sink

Configuration
Usage

Messages sent to offline users is published in pubsub node, from where that message is sent to all the node subscribers as a pubsub notification. 

<message from='pubsub.coffeebean.local' to='bard@shakespeare.lit' id='foo'>
  <event xmlns='http://jabber.org/protocol/pubsub#event'>
    <items node='message_sink'>
      <item id='ae890ac52d0df67ed7cfdf51b644e901'>
        <message type="chat" xmlns="jabber:client" id="x2ps6u0004"
          to="userB_h6x1bt0002@coffeebean.local"
          from="userA_uyhx8p0001@coffeebean.local/1149352695-tigase-20">
          <body>Hello</body>
        </message>
      </item>
    </items>
  </event>
</message>
Configuration
Create node
Add sess-man as publisher
config.tdsl configuration

The pubsub node must be created and configured beforehand:

Create node 
<iq type='set'
    to='pubsub.coffeebean.local'
    id='create1'>
  <pubsub xmlns='http://jabber.org/protocol/pubsub'>
    <create node='message_sink'/>
  </pubsub>
</iq>

After that is done, you need to add SessionManager as a publisher:

Add sess-man as publisher 
<iq type='set'
    to='pubsub.coffeebean.local'
    id='ent2'>
  <pubsub xmlns='http://jabber.org/protocol/pubsub#owner'>
    <affiliations node='message_sink'>
      <affiliation jid='sess-man@coffeebean.local' affiliation='publisher'/>
    </affiliations>
  </pubsub>
</iq>

Finally, the 'msgoffline' offline messages processor must be configured as well

config.tdsl configuration 
sess-man {
    msgoffline () {
        msg-pubsub-jid = 'pubsub.coffeebean.local'
        msg-pubsub-node = 'message_sink'
        msg-pubsub-publisher = 'sess-man@coffeebean.local'
    }
}
Usage
Managing Subscriptions

Because these sinks use a standard pubsub component, administration of the sink node is identical to any other pubsub node. XEP-0060 defines standard pubsub usage and management.

Managing Subscriptions
Add new Subscriber
Remove Subscriber
Add new Subscriber 
<iq type='set'
    to='pubsub.coffeebean.local'
    id='subman2'>
  <pubsub xmlns='http://jabber.org/protocol/pubsub#owner'>
    <subscriptions node='message_sink'>
      <subscription jid='bard@shakespeare.lit' subscription='subscribed'/>
    </subscriptions>
  </pubsub>
</iq>
Remove Subscriber 
<iq type='set'
    to='pubsub.coffeebean.local'
    id='subman2'>
  <pubsub xmlns='http://jabber.org/protocol/pubsub#owner'>
    <subscriptions node='message_sink'>
      <subscription jid='bard@shakespeare.lit' subscription='none'/>
    </subscriptions>
  </pubsub>
</iq>
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