function initialize_host(host)
local host_session = hosts[host];
- host_session.events.add_handler("item-added/data-driver", function (event)
+ host_session.events.add_handler("item-added/storage-provider", function (event)
local item = event.item;
stores_available:set(host, item.name, item);
end);
-
- host_session.events.add_handler("item-removed/data-driver", function (event)
+
+ host_session.events.add_handler("item-removed/storage-provider", function (event)
local item = event.item;
stores_available:set(host, item.name, nil);
end);
return stores_available:get(host, driver_name);
end
-function open(host, store, typ)
- local storage = config.get(host, "core", "storage");
+function get_driver(host, store)
+ local storage = config.get(host, "storage");
local driver_name;
local option_type = type(storage);
if option_type == "string" then
driver_name = storage[store];
end
if not driver_name then
- driver_name = config.get(host, "core", "default_storage") or "internal";
+ driver_name = config.get(host, "default_storage") or "internal";
end
-
+
local driver = load_driver(host, driver_name);
if not driver then
log("warn", "Falling back to null driver for %s storage on %s", store, host);
driver_name = "null";
driver = null_storage_driver;
end
-
+ return driver, driver_name;
+end
+
+local map_shim_mt = {
+ __index = {
+ get = function(self, username, key)
+ local ret, err = self.keyval_store:get(username);
+ if ret == nil then return nil, err end
+ return ret[key];
+ end;
+ set = function(self, username, key, data)
+ local current, err = self.keyval_store:get(username);
+ if current == nil then
+ if err then
+ return nil, err;
+ else
+ current = {};
+ end
+ end
+ current[key] = data;
+ return self.keyval_store:set(username, current);
+ end;
+ };
+}
+local function create_map_shim(host, store)
+ local keyval_store, err = open(host, store, "keyval");
+ if keyval_store == nil then return nil, err end
+ return setmetatable({
+ keyval_store = keyval_store;
+ }, map_shim_mt);
+end
+
+function open(host, store, typ)
+ local driver, driver_name = get_driver(host, store);
local ret, err = driver:open(store, typ);
if not ret then
if err == "unsupported-store" then
+ if typ == "map" then -- Use shim on top of keyval store
+ log("debug", "map storage driver unavailable, using shim on top of keyval store.");
+ return create_map_shim(host, store);
+ end
log("debug", "Storage driver %s does not support store %s (%s), falling back to null driver",
- driver_name, store, typ);
+ driver_name, store, typ or "<nil>");
ret = null_storage_driver;
err = nil;
end
return ret, err;
end
+function purge(user, host)
+ local storage = config.get(host, "storage");
+ if type(storage) == "table" then
+ -- multiple storage backends in use that we need to purge
+ local purged = {};
+ for store, driver in pairs(storage) do
+ if not purged[driver] then
+ purged[driver] = get_driver(host, store):purge(user);
+ end
+ end
+ end
+ get_driver(host):purge(user); -- and the default driver
+
+ olddm.purge(user, host); -- COMPAT list stores, like offline messages end up in the old datamanager
+
+ return true;
+end
+
function datamanager.load(username, host, datastore)
return open(host, datastore):get(username);
end
function datamanager.store(username, host, datastore, data)
return open(host, datastore):set(username, data);
end
+function datamanager.users(host, datastore, typ)
+ local driver = open(host, datastore, typ);
+ if not driver.users then
+ return function() log("warn", "storage driver %s does not support listing users", driver.name) end
+ end
+ return driver:users();
+end
+function datamanager.stores(username, host, typ)
+ return get_driver(host):stores(username, typ);
+end
+function datamanager.purge(username, host)
+ return purge(username, host);
+end
return _M;