More code reorg: move Gearman code to worker.py

Move the Gearman code used by the worker out of main.py and into
worker.py where it belongs.

Change-Id: Ied1e32034e7c2f497fcc6c183fc6c5f48cc08129

libra/worker/main.py

@@ -14,26 +14,16 @@
 
 import daemon
 import daemon.pidfile
-import gearman.errors
 import grp
 import pwd
-import socket
-from time import sleep
 
 from libra.openstack.common import importutils
-from libra.common.json_gearman import JSONGearmanWorker
 from libra.common.options import Options, setup_logging
 from libra.worker.worker import config_manager
 from libra.worker.drivers.base import known_drivers
 from libra.worker.drivers.haproxy.services_base import haproxy_services
 
 
-class CustomJSONGearmanWorker(JSONGearmanWorker):
-    """ Custom class we will use to pass arguments to the Gearman task. """
-    logger = None
-    driver = None
-
-
 class Server(object):
     """
     Encapsulates server activity so we can run it in either daemon or
@@ -48,31 +38,10 @@ class Server(object):
 
     def main(self):
         """ Main method of the server.  """
-        my_ip = socket.gethostbyname(socket.gethostname())
-        task_name = "lbaas-%s" % my_ip
-        self.logger.info("Registering task %s" % task_name)
-
-        worker = CustomJSONGearmanWorker(self.servers)
-        worker.set_client_id(my_ip)
-        worker.register_task(task_name, config_manager)
-        worker.logger = self.logger
-        worker.driver = self.driver
-
-        retry = True
-
-        while (retry):
-            try:
-                worker.work()
-            except KeyboardInterrupt:
-                retry = False
-            except gearman.errors.ServerUnavailable:
-                self.logger.error("Job server(s) went away. Reconnecting.")
-                sleep(self.reconnect_sleep)
-                retry = True
-            except Exception as e:
-                self.logger.critical("Exception: %s, %s" % (e.__class__, e))
-                retry = False
-
+        config_manager(self.logger,
+                       self.driver,
+                       self.servers,
+                       self.reconnect_sleep)
         self.logger.info("Shutting down")
 
 

libra/worker/worker.py

@@ -12,12 +12,22 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import gearman.errors
 import json
+import socket
+import time
 
+from libra.common.json_gearman import JSONGearmanWorker
 from libra.worker.controller import LBaaSController
 
 
-def config_manager(worker, job):
+class CustomJSONGearmanWorker(JSONGearmanWorker):
+    """ Custom class we will use to pass arguments to the Gearman task. """
+    logger = None
+    driver = None
+
+
+def handler(worker, job):
     """
     Main Gearman worker task.
 
@@ -36,3 +46,30 @@ def config_manager(worker, job):
 
     logger.debug("Return JSON message: %s" % json.dumps(response, indent=4))
     return response
+
+
+def config_manager(logger, driver, servers, reconnect_sleep):
+    my_ip = socket.gethostbyname(socket.gethostname())
+    task_name = "lbaas-%s" % my_ip
+    logger.info("Registering task %s" % task_name)
+
+    worker = CustomJSONGearmanWorker(servers)
+    worker.set_client_id(my_ip)
+    worker.register_task(task_name, handler)
+    worker.logger = logger
+    worker.driver = driver
+
+    retry = True
+
+    while (retry):
+        try:
+            worker.work()
+        except KeyboardInterrupt:
+            retry = False
+        except gearman.errors.ServerUnavailable:
+            logger.error("Job server(s) went away. Reconnecting.")
+            time.sleep(reconnect_sleep)
+            retry = True
+        except Exception as e:
+            logger.critical("Exception: %s, %s" % (e.__class__, e))
+            retry = False