Allow for platforms not supporting resource module

django_q/__init__.py

@@ -10,3 +10,8 @@ try:
     from croniter import croniter
 except ImportError:
     croniter = None
+
+try:
+    import resource
+except ModuleNotFoundError:
+    resource = None

django_q/cluster.py

@@ -1,7 +1,6 @@
 # Standard
 import ast
 import importlib
-import resource
 import signal
 import socket
 import traceback
@@ -28,7 +27,7 @@ from django_q.queues import Queue
 from django_q.signals import pre_execute
 from django_q.signing import SignedPackage, BadSignature
 from django_q.status import Stat, Status
-from django_q import croniter
+from django_q import croniter, resource
 
 
 class Cluster:
@@ -435,7 +434,11 @@ def worker(
             result_queue.put(task)
             timer.value = -1  # Idle
             # Recycle
-            if task_count == Conf.RECYCLE or (Conf.MAX_RSS and resource.getrusage(resource.RUSAGE_SELF).ru_maxrss >= Conf.MAX_RSS):
+            if task_count == Conf.RECYCLE or (
+                resource
+                and Conf.MAX_RSS
+                and resource.getrusage(resource.RUSAGE_SELF).ru_maxrss >= Conf.MAX_RSS
+            ):
                 timer.value = -2  # Recycled
                 break
     logger.info(_(f"{name} stopped doing work"))

django_q/conf.py

@@ -104,7 +104,8 @@ class Conf:
     # Number of tasks each worker can handle before it gets recycled. Useful for releasing memory
     RECYCLE = conf.get("recycle", 500)
 
-    # The maximum resident set size in kilobytes before a worker will recycle. Useful for limiting memory usage.
+    # The maximum resident set size in kilobytes before a worker will recycle. Useful for limiting memory usage
+    # Not available on all platforms
     MAX_RSS = conf.get("max_rss", None)
 
     # Number of seconds to wait for a worker to finish.
@@ -214,7 +215,7 @@ if Conf.ERROR_REPORTER:
         # and instantiate an ErrorReporter using the provided config
         for name, conf in error_conf.items():
             for entry in pkg_resources.iter_entry_points(
-                    "djangoq.errorreporters", name
+                "djangoq.errorreporters", name
             ):
                 Reporter = entry.load()
                 reporters.append(Reporter(**conf))