THRIFT-2663: py - per module logger used in python lib

Client: Python-Library
Patch: Dustin Spicuzza

This enables per module log message filtering

This closes #187
diff --git a/lib/py/src/server/TNonblockingServer.py b/lib/py/src/server/TNonblockingServer.py
index fa478d0..4a035b6 100644
--- a/lib/py/src/server/TNonblockingServer.py
+++ b/lib/py/src/server/TNonblockingServer.py
@@ -29,7 +29,9 @@
 import Queue
 import select
 import struct
+
 import logging
+logger = logging.getLogger(__name__)
 
 from thrift.transport import TTransport
 from thrift.protocol.TBinaryProtocol import TBinaryProtocolFactory
@@ -54,7 +56,7 @@
                 processor.process(iprot, oprot)
                 callback(True, otrans.getvalue())
             except Exception:
-                logging.exception("Exception while processing request")
+                logger.exception("Exception while processing request")
                 callback(False, '')
 
 WAIT_LEN = 0
@@ -116,18 +118,18 @@
             # if we read 0 bytes and self.message is empty, then
             # the client closed the connection
             if len(self.message) != 0:
-                logging.error("can't read frame size from socket")
+                logger.error("can't read frame size from socket")
             self.close()
             return
         self.message += read
         if len(self.message) == 4:
             self.len, = struct.unpack('!i', self.message)
             if self.len < 0:
-                logging.error("negative frame size, it seems client "
+                logger.error("negative frame size, it seems client "
                               "doesn't use FramedTransport")
                 self.close()
             elif self.len == 0:
-                logging.error("empty frame, it's really strange")
+                logger.error("empty frame, it's really strange")
                 self.close()
             else:
                 self.message = ''
@@ -145,7 +147,7 @@
         elif self.status == WAIT_MESSAGE:
             read = self.socket.recv(self.len - len(self.message))
             if len(read) == 0:
-                logging.error("can't read frame from socket (get %d of "
+                logger.error("can't read frame from socket (get %d of "
                               "%d bytes)" % (len(self.message), self.len))
                 self.close()
                 return
diff --git a/lib/py/src/server/TProcessPoolServer.py b/lib/py/src/server/TProcessPoolServer.py
index 7369466..eefb623 100644
--- a/lib/py/src/server/TProcessPoolServer.py
+++ b/lib/py/src/server/TProcessPoolServer.py
@@ -19,6 +19,8 @@
 
 
 import logging
+logger = logging.getLogger(__name__)
+
 from multiprocessing import  Process, Value, Condition, reduction
 
 from TServer import TServer
@@ -62,7 +64,7 @@
             except (KeyboardInterrupt, SystemExit):
                 return 0
             except Exception, x:
-                logging.exception(x)
+                logger.exception(x)
 
     def serveClient(self, client):
         """Process input/output from a client for as long as possible"""
@@ -77,7 +79,7 @@
         except TTransportException, tx:
             pass
         except Exception, x:
-            logging.exception(x)
+            logger.exception(x)
 
         itrans.close()
         otrans.close()
@@ -98,7 +100,7 @@
                 w.start()
                 self.workers.append(w)
             except Exception, x:
-                logging.exception(x)
+                logger.exception(x)
 
         # wait until the condition is set by stop()
         while True:
@@ -109,7 +111,7 @@
             except (SystemExit, KeyboardInterrupt):
                 break
             except Exception, x:
-                logging.exception(x)
+                logger.exception(x)
 
         self.isRunning.value = False
 
diff --git a/lib/py/src/server/TServer.py b/lib/py/src/server/TServer.py
index 976a8f3..00fd8cf 100644
--- a/lib/py/src/server/TServer.py
+++ b/lib/py/src/server/TServer.py
@@ -18,12 +18,14 @@
 #
 
 import Queue
-import logging
 import os
 import sys
 import threading
 import traceback
 
+import logging
+logger = logging.getLogger(__name__)
+
 from thrift.Thrift import TProcessor
 from thrift.protocol import TBinaryProtocol
 from thrift.transport import TTransport
@@ -87,7 +89,7 @@
       except TTransport.TTransportException, tx:
         pass
       except Exception, x:
-        logging.exception(x)
+        logger.exception(x)
 
       itrans.close()
       otrans.close()
@@ -113,7 +115,7 @@
       except KeyboardInterrupt:
         raise
       except Exception, x:
-        logging.exception(x)
+        logger.exception(x)
 
   def handle(self, client):
     itrans = self.inputTransportFactory.getTransport(client)
@@ -126,7 +128,7 @@
     except TTransport.TTransportException, tx:
       pass
     except Exception, x:
-      logging.exception(x)
+      logger.exception(x)
 
     itrans.close()
     otrans.close()
@@ -152,7 +154,7 @@
         client = self.clients.get()
         self.serveClient(client)
       except Exception, x:
-        logging.exception(x)
+        logger.exception(x)
 
   def serveClient(self, client):
     """Process input/output from a client for as long as possible"""
@@ -166,7 +168,7 @@
     except TTransport.TTransportException, tx:
       pass
     except Exception, x:
-      logging.exception(x)
+      logger.exception(x)
 
     itrans.close()
     otrans.close()
@@ -179,7 +181,7 @@
         t.setDaemon(self.daemon)
         t.start()
       except Exception, x:
-        logging.exception(x)
+        logger.exception(x)
 
     # Pump the socket for clients
     self.serverTransport.listen()
@@ -190,7 +192,7 @@
           continue
         self.clients.put(client)
       except Exception, x:
-        logging.exception(x)
+        logger.exception(x)
 
 
 class TForkingServer(TServer):
@@ -215,7 +217,7 @@
       try:
         file.close()
       except IOError, e:
-        logging.warning(e, exc_info=True)
+        logger.warning(e, exc_info=True)
 
     self.serverTransport.listen()
     while True:
@@ -251,7 +253,7 @@
             except TTransport.TTransportException, tx:
               pass
             except Exception, e:
-              logging.exception(e)
+              logger.exception(e)
               ecode = 1
           finally:
             try_close(itrans)
@@ -262,7 +264,7 @@
       except TTransport.TTransportException, tx:
         pass
       except Exception, x:
-        logging.exception(x)
+        logger.exception(x)
 
   def collect_children(self):
     while self.children: