Added ZMQ communication wireframe

shaker/agent/agent.py

@@ -0,0 +1,71 @@
+# Copyright (c) 2015 Mirantis Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import random
+
+from oslo.config import cfg
+import zmq
+
+from shaker.engine import config
+from shaker.engine import utils
+from shaker.openstack.common import log as logging
+
+
+LOG = logging.getLogger(__name__)
+
+
+def main():
+    # init conf and logging
+    conf = cfg.CONF
+    conf.register_cli_opts(config.AGENT_OPTS)
+    conf.register_opts(config.AGENT_OPTS)
+
+    try:
+        conf(project='shaker')
+    except cfg.RequiredOptError as e:
+        print('Error: %s' % e)
+        conf.print_usage()
+        exit(1)
+
+    logging.setup('shaker')
+    LOG.info('Logging enabled')
+
+    host, port = utils.split_address(cfg.CONF.agent_endpoint)
+
+    context = zmq.Context()
+    LOG.info('Connecting to server: %s:%s', host, port)
+
+    socket = context.socket(zmq.REQ)
+    socket.connect('tcp://localhost:%s' % port)
+    client_id = random.randrange(1, 10005)
+
+    # Do 10 requests, waiting each time for a response
+    try:
+        for request in range(10):
+            LOG.debug('Sending request %s' % request)
+            socket.send('Hello from %s' % client_id)
+            #  Get the reply.
+            message = socket.recv()
+            LOG.debug('Received reply %s [%s]', request, message)
+    except BaseException as e:
+        if not isinstance(e, KeyboardInterrupt):
+            LOG.exception(e)
+    finally:
+        LOG.info('Shutting down')
+        context.term()
+
+
+if __name__ == "__main__":
+    main()