mod_storage_sql2: Improve logging when database read fails

[prosody.git] / plugins / mod_storage_sql2.lua

diff --git a/plugins/mod_storage_sql2.lua b/plugins/mod_storage_sql2.lua
index 249c72a75ac2fb98e9e70728c69730c899920c3c..74d08801553bcfabd87e4159a5614cd42d8638e2 100644 (file)
--- a/plugins/mod_storage_sql2.lua
+++ b/plugins/mod_storage_sql2.lua
@@ -113,8 +113,6 @@ do -- process options to get a db connection
        --local dburi = db2uri(params);
        engine = mod_sql:create_engine(params);
 
-       engine:set_encoding();
-
        if module:get_option("sql_manage_tables", true) then
                -- Automatically create table, ignore failure (table probably already exists)
                create_table();
@@ -194,11 +192,18 @@ local function keyval_store_set(data)
        return true;
 end
 
+--- Key/value store API (default store type)
+
 local keyval_store = {};
 keyval_store.__index = keyval_store;
 function keyval_store:get(username)
-       user,store = username,self.store;
-       return select(2, engine:transaction(keyval_store_get));
+       user, store = username, self.store;
+       local ok, result = engine:transaction(keyval_store_get);
+       if not ok then
+               module:log("error", "Unable to read from database %s store for %s: %s", store, username or "<host>", result);
+               return nil, result;
+       end
+       return result;  
 end
 function keyval_store:set(username, data)
        user,store = username,self.store;
@@ -214,6 +219,8 @@ function keyval_store:users()
        return iterator(result);
 end
 
+--- Archive store API
+
 local archive_store = {}
 archive_store.__index = archive_store
 function archive_store:append(username, key, when, with, value)
@@ -342,6 +349,10 @@ local stores = {
        archive = archive_store;
 };
 
+--- Implement storage driver API
+
+-- FIXME: Some of these operations need to operate on the archive store(s) too
+
 local driver = {};
 
 function driver:open(store, typ)
@@ -353,13 +364,13 @@ function driver:open(store, typ)
 end
 
 function driver:stores(username)
-       local sql = "SELECT DISTINCT `store` FROM `prosody` WHERE `host`=? AND `user`" ..
+       local query = "SELECT DISTINCT `store` FROM `prosody` WHERE `host`=? AND `user`" ..
                (username == true and "!=?" or "=?");
        if username == true or not username then
                username = "";
        end
        local ok, result = engine:transaction(function()
-               return engine:select(sql, host, username);
+               return engine:select(query, host, username);
        end);
        if not ok then return ok, result end
        return iterator(result);
@@ -368,7 +379,7 @@ end
 function driver:purge(username)
        return engine:transaction(function()
                local stmt,err = engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=?", host, username);
-               return true,err;
+               return true, err;
        end);
 end