more formatting fixes

[nominatim.git] / nominatim / db / async_connection.py

diff --git a/nominatim/db/async_connection.py b/nominatim/db/async_connection.py
index fe8b30068d497322930b8e237c874c875b02edc0..a86c5bdcee13eb37c4874f29be286d2b06beecc0 100644 (file)
--- a/nominatim/db/async_connection.py
+++ b/nominatim/db/async_connection.py
@@ -28,22 +28,27 @@ class DeadlockHandler:
         normally.
     """
 
-    def __init__(self, handler):
+    def __init__(self, handler, ignore_sql_errors=False):
         self.handler = handler
+        self.ignore_sql_errors = ignore_sql_errors
 
     def __enter__(self):
-        pass
+        return self
 
     def __exit__(self, exc_type, exc_value, traceback):
         if __has_psycopg2_errors__:
             if exc_type == psycopg2.errors.DeadlockDetected: # pylint: disable=E1101
                 self.handler()
                 return True
-        else:
-            if exc_type == psycopg2.extensions.TransactionRollbackError:
-                if exc_value.pgcode == '40P01':
-                    self.handler()
-                    return True
+        elif exc_type == psycopg2.extensions.TransactionRollbackError \
+             and exc_value.pgcode == '40P01':
+            self.handler()
+            return True
+
+        if self.ignore_sql_errors and isinstance(exc_value, psycopg2.Error):
+            LOG.info("SQL error ignored: %s", exc_value)
+            return True
+
         return False
 
 
@@ -51,10 +56,11 @@ class DBConnection:
     """ A single non-blocking database connection.
     """
 
-    def __init__(self, dsn, cursor_factory=None):
+    def __init__(self, dsn, cursor_factory=None, ignore_sql_errors=False):
         self.current_query = None
         self.current_params = None
         self.dsn = dsn
+        self.ignore_sql_errors = ignore_sql_errors
 
         self.conn = None
         self.cursor = None
@@ -79,7 +85,7 @@ class DBConnection:
 
         # Use a dict to hand in the parameters because async is a reserved
         # word in Python3.
-        self.conn = psycopg2.connect(**{'dsn' : self.dsn, 'async' : True})
+        self.conn = psycopg2.connect(**{'dsn': self.dsn, 'async': True})
         self.wait()
 
         self.cursor = self.conn.cursor(cursor_factory=cursor_factory)
@@ -101,7 +107,7 @@ class DBConnection:
         """ Block until any pending operation is done.
         """
         while True:
-            with DeadlockHandler(self._deadlock_handler):
+            with DeadlockHandler(self._deadlock_handler, self.ignore_sql_errors):
                 wait_select(self.conn)
                 self.current_query = None
                 return
@@ -128,7 +134,7 @@ class DBConnection:
         if self.current_query is None:
             return True
 
-        with DeadlockHandler(self._deadlock_handler):
+        with DeadlockHandler(self._deadlock_handler, self.ignore_sql_errors):
             if self.conn.poll() == psycopg2.extensions.POLL_OK:
                 self.current_query = None
                 return True
@@ -143,8 +149,9 @@ class WorkerPool:
     """
     REOPEN_CONNECTIONS_AFTER = 100000
 
-    def __init__(self, dsn, pool_size):
-        self.threads = [DBConnection(dsn) for _ in range(pool_size)]
+    def __init__(self, dsn, pool_size, ignore_sql_errors=False):
+        self.threads = [DBConnection(dsn, ignore_sql_errors=ignore_sql_errors)
+                        for _ in range(pool_size)]
         self.free_workers = self._yield_free_worker()
         self.wait_time = 0
 
@@ -183,10 +190,7 @@ class WorkerPool:
                     yield thread
 
             if command_stat > self.REOPEN_CONNECTIONS_AFTER:
-                for thread in self.threads:
-                    while not thread.is_done():
-                        thread.wait()
-                    thread.connect()
+                self._reconnect_threads()
                 ready = self.threads
                 command_stat = 0
             else:
@@ -195,6 +199,13 @@ class WorkerPool:
                 self.wait_time += time.time() - tstart
 
 
+    def _reconnect_threads(self):
+        for thread in self.threads:
+            while not thread.is_done():
+                thread.wait()
+            thread.connect()
+
+
     def __enter__(self):
         return self