added a topology which will stop when a certain method is called or a SIGTERM/SIGINT...

diff --git a/src/emuvim/examples/profiling.py b/src/emuvim/examples/profiling.py
new file mode 100644 (file)
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+++ b/src/emuvim/examples/profiling.py
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+"""
+Copyright (c) 2015 SONATA-NFV
+ALL RIGHTS RESERVED.
+
+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.
+
+Neither the name of the SONATA-NFV [, ANY ADDITIONAL AFFILIATION]
+nor the names of its contributors may be used to endorse or promote
+products derived from this software without specific prior written
+permission.
+
+This work has been performed in the framework of the SONATA project,
+funded by the European Commission under Grant number 671517 through
+the Horizon 2020 and 5G-PPP programmes. The authors would like to
+acknowledge the contributions of their colleagues of the SONATA
+partner consortium (www.sonata-nfv.eu).
+"""
+"""
+A simple topology with a single data center for usage in son-profile.
+
+"""
+
+import logging
+from mininet.log import setLogLevel
+from emuvim.dcemulator.net import DCNetwork
+from emuvim.api.rest.rest_api_endpoint import RestApiEndpoint
+from emuvim.api.sonata import SonataDummyGatekeeperEndpoint
+from mininet.node import RemoteController
+import argparse
+import sys
+import signal
+
+logging.basicConfig()
+LOG = logging.getLogger("sonata-profiling")
+LOG.setLevel(logging.DEBUG)
+logging.getLogger("werkzeug").setLevel(logging.WARNING)
+
+"""
+    Catches SIGINT and SIGTERM to shut the topology down gracefully.
+"""
+class GracefulKiller:
+    def __init__(self, to_be_killed):
+        signal.signal(signal.SIGINT, self.exit_gracefully)
+        signal.signal(signal.SIGTERM, self.exit_gracefully)
+        self.to_be_killed = to_be_killed
+
+    def exit_gracefully(self, signum, frame):
+        self.to_be_killed.stop_it()
+
+
+"""
+    A simple topology with only one data center which will stop when another thread tells it to or when a time limit is reached.
+    :args: an argument list which may contain the time limit
+"""
+class Profiling:
+
+    stop_now = False
+
+    def __init__(self):
+        GracefulKiller(self)
+        # create topology
+        self.net = DCNetwork(controller=RemoteController, monitor=False, enable_learning=False)
+        self.dc = self.net.addDatacenter("dc1")
+
+        # add the command line interface endpoint to each DC (REST API)
+        self.rapi1 = RestApiEndpoint("0.0.0.0", 5001)
+        self.rapi1.connectDCNetwork(self.net)
+        self.rapi1.connectDatacenter(self.dc)
+        # run API endpoint server (in another thread, don't block)
+        self.rapi1.start()
+
+        # add the SONATA dummy gatekeeper to each DC
+        self.sdkg1 = SonataDummyGatekeeperEndpoint("0.0.0.0", 5000, deploy_sap=False)
+        self.sdkg1.connectDatacenter(self.dc)
+        # run the dummy gatekeeper (in another thread, don't block)
+        self.sdkg1.start()
+
+
+        self.net.start()
+        LOG.info("Started topology")
+        while(not self.stop_now):
+            pass
+        self.net.stop()
+        LOG.info("Stopped topology")
+
+    def stop_it(self):
+        self.stop_now = True
+
+
+def main(args):
+    setLogLevel('info')  # set Mininet loglevel
+    p = Profiling()
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description="Run a simple topology")
+    parser.add_argument('--time', '-t', metavar='seconds', type=float, help='a time limit', default=-1, required=False, dest='time')
+    arg_list = vars(parser.parse_args(sys.argv[1:]))
+    main(arg_list)