Integrate pigar into Trains

trains/utilities/pigar/extractor/extractor.py

@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import print_function, division, absolute_import
+
+import multiprocessing
+
+
+class BaseExtractor(object):
+
+    def __init__(self, names, max_workers=None):
+        self._names = names
+        self._max_workers = max_workers or (multiprocessing.cpu_count() * 4)
+
+    def run(self, job):
+        try:
+            self.extract(job)
+            self.wait_complete()
+        except KeyboardInterrupt:
+            print('** Shutting down ...')
+            self.shutdown()
+        else:
+            print('^.^ Extracting all packages done!')
+        finally:
+            self.final()
+
+    def extract(self, job):
+        raise NotImplemented
+
+    def wait_complete(self):
+        raise NotImplemented
+
+    def shutdown(self):
+        raise NotImplemented
+
+    def final(self):
+        pass