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obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
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Software is furnished to do so, subject to the following
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The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Source

"use strict";

var async = require("async");

AbstractPersistence

function
AbstractPersistence()

Description

An Abstract Mosca persistance implementation

Source

function AbstractPersistence() {

}

wire

method
AbstractPersistence.prototype.wire()

@param: {Server}serverThe Mosca Server.

Description

This wires the Mosca server to a persistance, plugging in
the persistance into the relevant Mosca events.

Source

AbstractPersistence.prototype.wire = function(server) {
  var that = this;
  var nop = function() {};
  server.persistence = this;

  server.storePacket = function(packet, cb) {
    var total = 1;
    var done = function() {
      if (--total === 0 && cb) {
        cb();
      }
    };
    if (packet.retain) {
      total++;
      that.storeRetained(packet, done);
    }
    that.storeOfflinePacket(packet, done);
  };

  server.deleteOfflinePacket = function(client, messageId, cb) {
    that.deleteOfflinePacket(client, messageId, cb);
  };

  server.updateOfflinePacket = function(client, messageId, packet, cb) {
    that.updateOfflinePacket(client, messageId, packet, cb);
  };

  server.forwardRetained = function(pattern, client, done) {
    that.lookupRetained(pattern, function(err, matches) {
      if (err) {
        client.emit("error", err);
        return;
      }
      async.each(matches, function(match, cb) {
        client.forward(match.topic, match.payload, match, pattern, match.qos, cb);
      }, done);
    });
  };

  server.on("close", function() {
    that.close();
  });

  server.restoreClientSubscriptions = function restoreClientSubscriptions(client, done) {
    that.lookupSubscriptions(client, function(err, subscriptions) {
      if (err) {
        client.emit("error", err);
        return;
      }

      async.each(Object.keys(subscriptions), function(topic, inCb) {
        client.logger.debug({ topic: topic, qos: subscriptions[topic].qos }, "restoring subscription");
        client.handleAuthorizeSubscribe(
          null, true, {
          topic: topic,
          qos: subscriptions[topic].qos
        }, inCb);
      }, done);
    });
  };

  server.forwardOfflinePackets = function forwardOfflinePackets(client, done) {
    that.streamOfflinePackets(client, function(err, packet) {
      packet.offline = true;
      client.logger.debug({ packet: packet }, "Forwarding offline packet");
      client.forward(packet.topic, packet.payload, packet, packet.topic, 1);
    }, done);
  };

  server.persistClient = function(client, done) {
    client.logger.debug("Storing offline subscriptions");
    that.storeSubscriptions(client, done);
  };
};

close

method
AbstractPersistence.prototype.close()

@param: {Function}donethe callback

Description

Close the persistance.

Source

AbstractPersistence.prototype.close = function(done) {
  if (done) {
    done(new Error("not implemented yet"));
  }
};

exports

property
module.exports

Description

Export it as a module

Source

module.exports = AbstractPersistence;

Mosca lib/persistence/abstract.js