New broadcast command: dump_tasks

celery/worker/control.py

@@ -4,6 +4,7 @@ from celery import log
 from celery.registry import tasks
 from celery.worker.revoke import revoked
 
+TASK_INFO_FIELDS = ("exchange", "routing_key", "rate_limit")
 
 def expose(fun):
     """Expose method as a celery worker control command, allowed to be called
@@ -56,6 +57,25 @@ class Control(object):
         self.logger.critical("Got shutdown from remote.")
         raise SystemExit
 
+    @expose
+    def dump_tasks(self, **kwargs):
+        from celery import registry
+
+        def _extract_info(task):
+            fields = dict((field, str(getattr(task, field, None)))
+                            for field in TASK_INFO_FIELDS
+                                if getattr(task, field, None) is not None)
+            info = map("=".join, fields.items())
+            if not info:
+                return "\t%s" % task.name
+            return "\t%s [%s]" % (task.name, " ".join(info))
+
+        tasks = sorted(registry.tasks.keys())
+        tasks = [registry.tasks[task] for task in tasks]
+
+        self.logger.warn("* Dump of currently registered tasks:\n%s" % (
+            "\n".join(map(_extract_info, tasks))))
+
 
 class ControlDispatch(object):
     """Execute worker control panel commands."""