Merge pull request #3205 from esl/mu-configurable-pool-name-for-domai…

…n-service

Make pool_name configurable for service_domain_db

doc/developers-guide/domain_management.md

@@ -101,6 +101,21 @@ Configure host-type first to delete such domains.
 
 ## Service options
 
+```toml
+[services.service_domain_db]
+  db_pool = "global"
+  event_cleaning_interval = 1800
+  event_max_age = 7200
+```
+
+### `db_pool`
+By default, this service uses the RDBMS connection pool configured with the scope `"global"`.
+You can put a specific host type there to use the pool with the `"host"` or `"single_host"` scope for that particular host type. See [outgoing connections docs](../advanced-configuration/outgoing-connections.md) for more information about pool scopes.
+
+* **Syntax:** string
+* **Default:** `global`
+* **Example:** `db_pool = "my_host_type"`
+
 ### `event_cleaning_interval`
 The number of seconds between cleaning attempts of the `domain_events` table.
 * **Syntax:** positive integer

src/domain/mongoose_domain_sql.erl

@@ -260,7 +260,10 @@ row_to_map({HostType, Enabled}) ->
     #{host_type => HostType, enabled => mongoose_rdbms:to_bool(Enabled)}.
 
 get_db_pool() ->
-    hd(ejabberd_config:get_global_option(hosts)).
+    proplists:get_value(db_pool, get_service_opts(), global).
+
+get_service_opts() ->
+    mongoose_service:get_service_opts(service_domain_db).
 
 transaction(F) ->
     Pool = get_db_pool(),

src/domain/service_domain_db.erl

@@ -57,7 +57,9 @@ config_spec() ->
                <<"event_cleaning_interval">> => #option{type = integer,
                                                         validate = positive},
                <<"event_max_age">> => #option{type = integer,
-                                              validate = positive}
+                                              validate = positive},
+               <<"db_pool">> => #option{type = atom,
+                                        validate = pool_name}
               }}.
 
 start_link() ->