added subcommand to clean deleted relations for issue # 2444

[nominatim.git] / nominatim / tools / replication.py

diff --git a/nominatim/tools/replication.py b/nominatim/tools/replication.py
index 1c46c50c4522cda6b397bae3d65d4a8b6305d880..edd63e49a15931d289b2fd488737ad8d105dc532 100644 (file)
--- a/nominatim/tools/replication.py
+++ b/nominatim/tools/replication.py
@@ -18,7 +18,7 @@ import urllib.request as urlrequest
 
 import requests
 from nominatim.db import status
-from nominatim.db.connection import Connection
+from nominatim.db.connection import Connection, connect
 from nominatim.tools.exec_utils import run_osm2pgsql
 from nominatim.errors import UsageError
 
@@ -33,7 +33,8 @@ except ImportError as exc:
 
 LOG = logging.getLogger()
 
-def init_replication(conn: Connection, base_url: str) -> None:
+def init_replication(conn: Connection, base_url: str,
+                     socket_timeout: int = 60) -> None:
     """ Set up replication for the server at the given base URL.
     """
     LOG.info("Using replication source: %s", base_url)
@@ -42,9 +43,8 @@ def init_replication(conn: Connection, base_url: str) -> None:
     # margin of error to make sure we get all data
     date -= dt.timedelta(hours=3)
 
-    repl = ReplicationServer(base_url)
-
-    seq = repl.timestamp_to_sequence(date)
+    with _make_replication_server(base_url, socket_timeout) as repl:
+        seq = repl.timestamp_to_sequence(date)
 
     if seq is None:
         LOG.fatal("Cannot reach the configured replication service '%s'.\n"
@@ -57,7 +57,8 @@ def init_replication(conn: Connection, base_url: str) -> None:
     LOG.warning("Updates initialised at sequence %s (%s)", seq, date)
 
 
-def check_for_updates(conn: Connection, base_url: str) -> int:
+def check_for_updates(conn: Connection, base_url: str,
+                      socket_timeout: int = 60) -> int:
     """ Check if new data is available from the replication service at the
         given base URL.
     """
@@ -68,7 +69,8 @@ def check_for_updates(conn: Connection, base_url: str) -> int:
                   "Please run 'nominatim replication --init' first.")
         return 254
 
-    state = ReplicationServer(base_url).get_state_info()
+    with _make_replication_server(base_url, socket_timeout) as repl:
+        state = repl.get_state_info()
 
     if state is None:
         LOG.error("Cannot get state for URL %s.", base_url)
@@ -90,12 +92,14 @@ class UpdateState(Enum):
     NO_CHANGES = 3
 
 
-def update(conn: Connection, options: MutableMapping[str, Any],
+def update(dsn: str, options: MutableMapping[str, Any],
            socket_timeout: int = 60) -> UpdateState:
     """ Update database from the next batch of data. Returns the state of
         updates according to `UpdateState`.
     """
-    startdate, startseq, indexed = status.get_status(conn)
+    with connect(dsn) as conn:
+        startdate, startseq, indexed = status.get_status(conn)
+        conn.commit()
 
     if startseq is None:
         LOG.error("Replication not set up. "
@@ -128,19 +132,37 @@ def update(conn: Connection, options: MutableMapping[str, Any],
         if endseq is None:
             return UpdateState.NO_CHANGES
 
-        # Consume updates with osm2pgsql.
-        options['append'] = True
-        options['disable_jit'] = conn.server_version_tuple() >= (11, 0)
-        run_osm2pgsql(options)
+        with connect(dsn) as conn:
+            run_osm2pgsql_updates(conn, options)
 
-        # Write the current status to the file
-        endstate = repl.get_state_info(endseq)
-        status.set_status(conn, endstate.timestamp if endstate else None,
-                          seq=endseq, indexed=False)
+            # Write the current status to the file
+            endstate = repl.get_state_info(endseq)
+            status.set_status(conn, endstate.timestamp if endstate else None,
+                              seq=endseq, indexed=False)
+            conn.commit()
 
     return UpdateState.UP_TO_DATE
 
 
+def run_osm2pgsql_updates(conn: Connection, options: MutableMapping[str, Any]) -> None:
+    """ Run osm2pgsql in append mode.
+    """
+    # Remove any stale deletion marks.
+    with conn.cursor() as cur:
+        cur.execute('TRUNCATE place_to_be_deleted')
+    conn.commit()
+
+    # Consume updates with osm2pgsql.
+    options['append'] = True
+    options['disable_jit'] = conn.server_version_tuple() >= (11, 0)
+    run_osm2pgsql(options)
+
+    # Handle deletions
+    with conn.cursor() as cur:
+        cur.execute('SELECT flush_deleted_places()')
+    conn.commit()
+
+
 def _make_replication_server(url: str, timeout: int) -> ContextManager[ReplicationServer]:
     """ Returns a ReplicationServer in form of a context manager.
 
@@ -154,25 +176,25 @@ def _make_replication_server(url: str, timeout: int) -> ContextManager[Replicati
             """ Download a resource from the given URL and return a byte sequence
                 of the content.
             """
-            get_params = {
-                'headers': {"User-Agent" : f"Nominatim (pyosmium/{pyo_version.pyosmium_release})"},
-                'timeout': timeout or None,
-                'stream': True
-            }
+            headers = {"User-Agent" : f"Nominatim (pyosmium/{pyo_version.pyosmium_release})"}
 
             if self.session is not None:
-                return self.session.get(url.get_full_url(), **get_params)
+                return self.session.get(url.get_full_url(),
+                                       headers=headers, timeout=timeout or None,
+                                       stream=True)
 
             @contextmanager
             def _get_url_with_session() -> Iterator[requests.Response]:
                 with requests.Session() as session:
-                    request = session.get(url.get_full_url(), **get_params) # type: ignore
+                    request = session.get(url.get_full_url(),
+                                          headers=headers, timeout=timeout or None,
+                                          stream=True)
                     yield request
 
             return _get_url_with_session()
 
         repl = ReplicationServer(url)
-        repl.open_url = types.MethodType(patched_open_url, repl)
+        setattr(repl, 'open_url', types.MethodType(patched_open_url, repl))
 
         return cast(ContextManager[ReplicationServer], repl)