changes to support a simpler start/stop session API

daemon/examples/grpc/large.py

@@ -0,0 +1,74 @@
+import logging
+
+from core.api.grpc import client, core_pb2
+
+
+def log_event(event):
+    logging.info("event: %s", event)
+
+
+def main():
+    core = client.CoreGrpcClient()
+
+    with core.context_connect():
+        # create session
+        response = core.create_session()
+        session_id = response.session_id
+        logging.info("created session: %s", response)
+
+        # create nodes for session
+        nodes = []
+        position = core_pb2.Position(x=50, y=100)
+        switch = core_pb2.Node(id=1, type=core_pb2.NodeType.SWITCH, position=position)
+        nodes.append(switch)
+        for i in range(2, 50):
+            position = core_pb2.Position(x=50 + 50 * i, y=50)
+            node = core_pb2.Node(id=i, position=position, model="PC")
+            nodes.append(node)
+
+        # start session
+        links = []
+        response = core.start_session(session_id, nodes, links)
+        logging.info("started session: %s", response)
+
+        # handle events session may broadcast
+        # core.events(session_id, log_event)
+
+        # change session state
+        # response = core.set_session_state(
+        #     session_id, core_pb2.SessionState.CONFIGURATION
+        # )
+        # logging.info("set session state: %s", response)
+
+        # create switch node
+        # switch = core_pb2.Node(type=core_pb2.NodeType.SWITCH)
+        # response = core.add_node(session_id, switch)
+        # logging.info("created switch: %s", response)
+        # switch_id = response.node_id
+
+        # helper to create interfaces
+        # interface_helper = client.InterfaceHelper(ip4_prefix="10.83.0.0/16")
+        #
+        # for i in range(2):
+        #     # create node
+        #     position = core_pb2.Position(x=50 + 50 * i, y=50)
+        #     node = core_pb2.Node(position=position)
+        #     response = core.add_node(session_id, node)
+        #     logging.info("created node: %s", response)
+        #     node_id = response.node_id
+        #
+        #     # create link
+        #     interface_one = interface_helper.create_interface(node_id, 0)
+        #     response = core.add_link(session_id, node_id, switch_id, interface_one)
+        #     logging.info("created link: %s", response)
+
+        # change session state
+        # response = core.set_session_state(
+        #     session_id, core_pb2.SessionState.INSTANTIATION
+        # )
+        # logging.info("set session state: %s", response)
+
+
+if __name__ == "__main__":
+    logging.basicConfig(level=logging.DEBUG)
+    main()