#!/usr/bin/env python
-import sys
+import sys, os.path
+import pickle
+import time
import socket
import traceback
from urlparse import urlparse
from sfa.client.sfi import Sfi
from sfa.util.sfalogging import logger, DEBUG
-import sfa.util.xmlrpcprotocol as xmlrpcprotocol
+import sfa.client.xmlrpcprotocol as xmlrpcprotocol
def url_hostname_port (url):
if url.find("://")<0:
else:
return (url,parts[0],parts[1])
+### a very simple cache mechanism so that successive runs (see make)
+### will go *much* faster
+### assuming everything is sequential, as simple as it gets
+### { url -> (timestamp,version)}
+class VersionCache:
+ def __init__ (self, filename=None, expires=60*60):
+ # default is to store cache in the same dir as argv[0]
+ if filename is None:
+ filename=os.path.join(os.path.dirname(sys.argv[0]),"sfascan-version-cache.pickle")
+ self.filename=filename
+ self.expires=expires
+ self.url2version={}
+ self.load()
+
+ def load (self):
+ try:
+ infile=file(self.filename,'r')
+ self.url2version=pickle.load(infile)
+ infile.close()
+ except:
+ logger.info("Cannot load version cache, restarting from scratch")
+ self.url2version = {}
+ logger.debug("loaded version cache with %d entries"%(len(self.url2version)))
+
+ def save (self):
+ try:
+ outfile=file(self.filename,'w')
+ pickle.dump(self.url2version,outfile)
+ outfile.close()
+ except:
+ logger.log_exc ("Cannot save version cache into %s"%self.filename)
+ def clean (self):
+ try:
+ os.unlink(self.filename)
+ logger.info("Cleaned up version cache %s"%self.filename)
+ except:
+ logger.log_exc ("Could not unlink version cache %s"%self.filename)
+
+ def show (self):
+ entries=len(self.url2version)
+ print "version cache from file %s has %d entries"%(self.filename,entries)
+ for (url,tuple) in self.url2version.iteritems():
+ (timestamp,version) = tuple
+ how_old = time.time()-timestamp
+ if how_old<=self.expires:
+ print url,"(%d seconds ago)"%how_old,"-> keys=",version.keys()
+ else:
+ print url,"(%d seconds ago)"%how_old,"too old"
+
+ def set (self,url,version):
+ self.url2version[url]=( time.time(), version)
+ def get (self,url):
+ try:
+ (timestamp,version)=self.url2version[url]
+ how_old = time.time()-timestamp
+ if how_old<=self.expires: return version
+ else: return None
+ except:
+ return None
+
###
class Interface:
- def __init__ (self,url):
+ def __init__ (self,url,verbose=False):
self._url=url
+ self.verbose=verbose
try:
(self._url,self.hostname,self.port)=url_hostname_port(url)
self.ip=socket.gethostbyname(self.hostname)
# connect to server and trigger GetVersion
def get_version(self):
+ ### if we already know the answer:
if self.probed:
return self._version
+ ### otherwise let's look in the cache file
+ cached_version = VersionCache().get(self.url())
+ if cached_version:
+ logger.info("Retrieved version info from cache")
+ return cached_version
+ ### otherwise let's do the hard work
# dummy to meet Sfi's expectations for its 'options' field
class DummyOptions:
pass
options=DummyOptions()
- options.verbose=False
+ options.verbose=self.verbose
options.timeout=10
try:
client=Sfi(options)
key_file = client.get_key_file()
cert_file = client.get_cert_file(key_file)
url=self.url()
- logger.info('issuing get version at %s'%url)
- logger.debug("GetVersion, using timeout=%d"%options.timeout)
- server=xmlrpcprotocol.get_server(url, key_file, cert_file, timeout=options.timeout, verbose=options.verbose)
+ logger.info('issuing GetVersion at %s'%url)
+ # setting timeout here seems to get the call to fail - even though the response time is fast
+ #server=xmlrpcprotocol.server_proxy(url, key_file, cert_file, verbose=self.verbose, timeout=options.timeout)
+ server=xmlrpcprotocol.server_proxy(url, key_file, cert_file, verbose=self.verbose)
self._version=server.GetVersion()
except:
+ logger.log_exc("failed to get version")
self._version={}
+ # so that next run from this process will find out
self.probed=True
+ # store in version cache so next processes will remember for an hour
+ cache=VersionCache()
+ cache.set(self.url(),self._version)
+ cache.save()
+ logger.info("Saved version for url=%s in version cache"%self.url())
+ # that's our result
return self._version
@staticmethod
help="output filenames (cumulative) - defaults are %r"%default_outfiles)
parser.add_option("-l","--left-to-right",action="store_true",dest="left_to_right",default=False,
help="instead of top-to-bottom")
- parser.add_option("-v","--verbose",action='store_true',dest='verbose',default=False,
- help="verbose")
- parser.add_option("-d","--debug",action='store_true',dest='debug',default=False,
- help="debug")
+ parser.add_option("-v", "--verbose", action="count", dest="verbose", default=0,
+ help="verbose - can be repeated for more verbosity")
+ parser.add_option("-c", "--clear-cache",action='store_true',
+ dest='clear_cache',default=False,
+ help='clear/trash version cache and exit')
+ parser.add_option("-s","--show-cache",action='store_true',
+ dest='show_cache',default=False,
+ help='show/display version cache')
+
(options,args)=parser.parse_args()
+ if options.show_cache:
+ VersionCache().show()
+ sys.exit(0)
+ if options.clear_cache:
+ VersionCache().clean()
+ sys.exit(0)
if not args:
parser.print_help()
sys.exit(1)
+
if not options.outfiles:
options.outfiles=default_outfiles
logger.enable_console()
- if options.debug:
- options.verbose=True
- logger.setLevel(DEBUG)
- scanner=SfaScan(left_to_right=options.left_to_right, verbose=options.verbose)
+ # apply current verbosity to logger
+ logger.setLevelFromOptVerbose(options.verbose)
+ # figure if we need to be verbose for these local classes that only have a bool flag
+ bool_verbose=logger.getBoolVerboseFromOpt(options.verbose)
+ scanner=SfaScan(left_to_right=options.left_to_right, verbose=bool_verbose)
entries = [ Interface(entry) for entry in args ]
g=scanner.graph(entries)
logger.info("creating layout")
git://git.onelab.eu / sfa.git / blobdiff