Allow max_connections to be set in RedisSettings (#406)

Co-authored-by: Samuel Colvin <[email protected]>

arq/connections.py

@@ -44,6 +44,7 @@ class RedisSettings:
     conn_timeout: int = 1
     conn_retries: int = 5
     conn_retry_delay: int = 1
+    max_connections: Optional[int] = None
 
     sentinel: bool = False
     sentinel_master: str = 'mymaster'
@@ -264,6 +265,7 @@ def pool_factory(*args: Any, **kwargs: Any) -> ArqRedis:
             retry=settings.retry,
             retry_on_timeout=settings.retry_on_timeout,
             retry_on_error=settings.retry_on_error,
+            max_connections=settings.max_connections,
         )
 
     while True:

tests/test_utils.py

@@ -22,7 +22,8 @@ def test_settings_changed():
         "RedisSettings(host='localhost', port=123, unix_socket_path=None, database=0, username=None, password=None, "
         "ssl=False, ssl_keyfile=None, ssl_certfile=None, ssl_cert_reqs='required', ssl_ca_certs=None, "
         'ssl_ca_data=None, ssl_check_hostname=False, conn_timeout=1, conn_retries=5, conn_retry_delay=1, '
-        "sentinel=False, sentinel_master='mymaster', retry_on_timeout=False, retry_on_error=None, retry=None)"
+        "max_connections=None, sentinel=False, sentinel_master='mymaster', "
+        'retry_on_timeout=False, retry_on_error=None, retry=None)'
     ) == str(settings)
 
 
@@ -224,6 +225,7 @@ def test_settings_plain():
         'retry_on_timeout': False,
         'retry_on_error': None,
         'retry': None,
+        'max_connections': None,
     }
 
 
@@ -252,4 +254,5 @@ def test_settings_from_socket_dsn():
         'retry_on_timeout': False,
         'retry_on_error': None,
         'retry': None,
+        'max_connections': None,
     }