connections stats collector / cmd output, remote dhcp resolver, fixes / optimizations

mktxp/cli/output/conn_stats_out.py

@@ -0,0 +1,49 @@
+# coding=utf8
+## Copyright (c) 2020 Arseniy Kuznetsov
+##
+## This program is free software; you can redistribute it and/or
+## modify it under the terms of the GNU General Public License
+## as published by the Free Software Foundation; either version 2
+## of the License, or (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+
+
+from mktxp.flow.processor.output import BaseOutputProcessor
+from mktxp.datasource.connection_ds import IPConnectionStatsDatasource
+
+
+class ConnectionsStatsOutput:
+    ''' Connections Stats Output
+    '''    
+    @staticmethod
+    def clients_summary(router_entry):
+        connection_records = IPConnectionStatsDatasource.metric_records(router_entry, add_router_id = False)
+        if not connection_records:
+            print('No connection stats records')
+            return 
+
+        conn_cnt = 0
+        output_records = []
+        for registration_record in sorted(connection_records, key = lambda rt_record: rt_record['connection_count'], reverse=True):
+            BaseOutputProcessor.resolve_dhcp(router_entry, registration_record, id_key = 'src_address', resolve_address = False)        
+            output_records.append(registration_record)
+            conn_cnt += registration_record['connection_count']
+
+        output_records_cnt = 0
+        output_entry = BaseOutputProcessor.OutputConnStatsEntry
+        output_table = BaseOutputProcessor.output_table(output_entry)
+        
+        for record in output_records:
+            output_table.add_row(output_entry(**record))
+            output_table.add_row(output_entry())
+            output_records_cnt += 1
+                
+        print (output_table.draw())
+
+        print(f'Distinct source addresses: {output_records_cnt}')
+        print(f'Total open connections: {conn_cnt}', '\n')
+