the first commit

prune_process_cache.py

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+# Copyright 2019 Novartis Institutes for BioMedical Research 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 time
+
+import psutil
+
+from util import current_time_stamp
+
+
+class PruneProcessCache:
+    def __init__(self, cache):
+        self.cache = cache
+
+    def __call__(self):
+        while True:
+            time.sleep(60)
+
+            timestamp = current_time_stamp()
+
+            processes_to_delete = []
+            for p in self.cache.entry_list:
+                if timestamp - p.timestamp > 3600:
+                    processes_to_delete.append(p)
+                    processes_to_delete
+
+            for process in processes_to_delete:
+                self.cache.entry_list.remove(process)
+                pid = process.pid
+                p = psutil.Process(pid)
+                p.terminate()
+                p = psutil.Process(pid + 2)
+                p.terminate()