Merge "Simulator: handle SIGINT and SIGTERM signals"

tools/simulator.py

@@ -22,6 +22,7 @@ import json
 import logging
 import os
 import random
+import signal
 import six
 import string
 import sys
@@ -40,6 +41,8 @@ RANDOM_GENERATOR = None
 CURRENT_PID = None
 CLIENTS = []
 MESSAGES = []
+IS_RUNNING = True
+SERVERS = []
 
 USAGE = """ Usage: ./simulator.py [-h] [--url URL] [-d DEBUG]\
  {notify-server,notify-client,rpc-server,rpc-client} ...
@@ -116,7 +119,9 @@ class MessageStatsCollector(object):
         threading.Timer(1.0, self.monitor).start()  # schedule in a second
 
     def monitor(self):
-        threading.Timer(1.0, self.monitor).start()
+        global IS_RUNNING
+        if IS_RUNNING:
+            threading.Timer(1.0, self.monitor).start()
         now = time.time()
 
         count = len(self.buffer)
@@ -382,17 +387,18 @@ def generate_messages(messages_count):
 
 
 def run_server(server, duration=None):
-    try:
-        server.start()
-        if duration:
-            with timeutils.StopWatch(duration) as stop_watch:
-                while not stop_watch.expired():
-                    time.sleep(1)
-            server.stop()
-        server.wait()
-    except KeyboardInterrupt:  # caught SIGINT
-        LOG.info('Caught SIGINT, terminating')
-        time.sleep(1)  # wait for stats collector to process the last second
+    global IS_RUNNING
+    SERVERS.append(server)
+    server.start()
+    if duration:
+        with timeutils.StopWatch(duration) as stop_watch:
+            while not stop_watch.expired() and IS_RUNNING:
+                time.sleep(1)
+        server.stop()
+        IS_RUNNING = False
+    server.wait()
+    LOG.info('The server is terminating')
+    time.sleep(1)  # wait for stats collector to process the last second
 
 
 def rpc_server(transport, target, wait_before_answer, executor, duration):
@@ -430,20 +436,24 @@ def spawn_notify_clients(threads, topic, transport, message_count,
 
 
 def send_messages(client_id, client_builder, messages_count, duration):
+    global IS_RUNNING
     client = client_builder()
     CLIENTS.append(client)
 
     if duration:
         with timeutils.StopWatch(duration) as stop_watch:
-            while not stop_watch.expired():
+            while not stop_watch.expired() and IS_RUNNING:
                 client.send_msg()
                 eventlet.sleep()
+        IS_RUNNING = False
     else:
         LOG.debug("Sending %d messages using client %d",
                   messages_count, client_id)
         for _ in six.moves.range(0, messages_count):
             client.send_msg()
             eventlet.sleep()
+            if not IS_RUNNING:
+                break
         LOG.debug("Client %d has sent %d messages", client_id, messages_count)
 
     time.sleep(1)  # wait for replies to be collected
@@ -522,6 +532,14 @@ def write_json_file(filename, output):
         LOG.info('Stats are written into %s', filename)
 
 
+def signal_handler(signum, frame):
+    global IS_RUNNING
+    IS_RUNNING = False
+    LOG.info('Signal %s is caught. Interrupting the execution', signum)
+    for server in SERVERS:
+        server.stop()
+
+
 def _setup_logging(is_debug):
     log_level = logging.DEBUG if is_debug else logging.INFO
     logging.basicConfig(
@@ -626,6 +644,9 @@ def main():
     cfg.CONF.prog = os.path.basename(__file__)
     cfg.CONF.project = 'oslo.messaging'
 
+    signal.signal(signal.SIGTERM, signal_handler)
+    signal.signal(signal.SIGINT, signal_handler)
+
     if args.mode == 'rpc-server':
         target = messaging.Target(topic=args.topic, server=args.server)
         if args.url.startswith('zmq'):