[Zope-Checkins] CVS: Zope/ZServer - DebugLogger.py:1.7

[Chris McDonough]

Update of /cvs-repository/Zope/ZServer
In directory cvs.zope.org:/tmp/cvs-serv24893

Modified Files:
	DebugLogger.py 
Log Message:
These patches provide clean signal handling and logfile rotation to Zope.

All Zope process will respond to signals in the specified manner:

  SIGHUP -  close open database connections and sockets, then restart the
            process

  SIGTERM - close open database connections and sockets, then shut down.

  SIGINT  - same as SIGTERM

  SIGUSR2 - rotate all Zope log files (z2.log, event log, detailed log)

The common idiom for doing automated logfile rotation will become:

kill -USR2 `cat /path/to/var/z2.pid`

The common idiom for doing "prophylactic" restarts will become:

kill -HUP `cat /path/to/var/z2.pid`

When a process is interrupted via ctrl-C or via a TERM signal (INT, TERM),
all open database connections and sockets will be closed before
the process dies.  This will speed up restart time for sites that
use a FileStorage as its index will be written to the filesystem before
shutdown. 

Unspecified signals kill the process without doing cleanup.




=== Zope/ZServer/DebugLogger.py 1.6 => 1.7 ===
     
     def __init__(self, filename):
+        self.filename = filename
         self.file=open(filename, 'a+b')
         l=thread.allocate_lock()
         self._acquire=l.acquire
         self._release=l.release
         self.log('U', '000000000', 'System startup')
         
+    def reopen(self):
+        self.file.close()
+        self.file=open(self.filename, 'a+b')
+        self.log('U', '000000000', 'Logfile reopened')
+
     def log(self, code, request_id, data=''):
         self._acquire()
         try: