import time
import threading
import timer
+import datetime
global_client_object = None
from api import *
import config
import arvados.errors
+import arvados.util
+
+class KeepLocator(object):
+ EPOCH_DATETIME = datetime.datetime.utcfromtimestamp(0)
+
+ def __init__(self, locator_str):
+ self.size = None
+ self.loc_hint = None
+ self._perm_sig = None
+ self._perm_expiry = None
+ pieces = iter(locator_str.split('+'))
+ self.md5sum = next(pieces)
+ for hint in pieces:
+ if hint.startswith('A'):
+ self.parse_permission_hint(hint)
+ elif hint.startswith('K'):
+ self.loc_hint = hint # FIXME
+ elif hint.isdigit():
+ self.size = int(hint)
+ else:
+ raise ValueError("unrecognized hint data {}".format(hint))
+
+ def __str__(self):
+ return '+'.join(
+ str(s) for s in [self.md5sum, self.size, self.loc_hint,
+ self.permission_hint()]
+ if s is not None)
+
+ def _make_hex_prop(name, length):
+ # Build and return a new property with the given name that
+ # must be a hex string of the given length.
+ data_name = '_{}'.format(name)
+ def getter(self):
+ return getattr(self, data_name)
+ def setter(self, hex_str):
+ if not arvados.util.is_hex(hex_str, length):
+ raise ValueError("{} must be a {}-digit hex string: {}".
+ format(name, length, hex_str))
+ setattr(self, data_name, hex_str)
+ return property(getter, setter)
+
+ md5sum = _make_hex_prop('md5sum', 32)
+ perm_sig = _make_hex_prop('perm_sig', 40)
+
+ @property
+ def perm_expiry(self):
+ return self._perm_expiry
+
+ @perm_expiry.setter
+ def perm_expiry(self, value):
+ if not arvados.util.is_hex(value, 1, 8):
+ raise ValueError(
+ "permission timestamp must be a hex Unix timestamp: {}".
+ format(value))
+ self._perm_expiry = datetime.datetime.utcfromtimestamp(int(value, 16))
+
+ def permission_hint(self):
+ data = [self.perm_sig, self.perm_expiry]
+ if None in data:
+ return None
+ data[1] = int((data[1] - self.EPOCH_DATETIME).total_seconds())
+ return "A{}@{:08x}".format(*data)
+
+ def parse_permission_hint(self, s):
+ try:
+ self.perm_sig, self.perm_expiry = s[1:].split('@', 1)
+ except IndexError:
+ raise ValueError("bad permission hint {}".format(s))
+
+ def permission_expired(self, as_of_dt=None):
+ if self.perm_expiry is None:
+ return False
+ elif as_of_dt is None:
+ as_of_dt = datetime.datetime.now()
+ return self.perm_expiry <= as_of_dt
+
class Keep:
@staticmethod
def __init__(self, todo):
self._todo = todo
self._done = 0
+ self._response = None
self._todo_lock = threading.Semaphore(todo)
self._done_lock = threading.Lock()
with self._done_lock:
return (self._done < self._todo)
- def increment_done(self):
+ def save_response(self, response_body, replicas_stored):
+ """
+ Records a response body (a locator, possibly signed) returned by
+ the Keep server. It is not necessary to save more than
+ one response, since we presume that any locator returned
+ in response to a successful request is valid.
+ """
+ with self._done_lock:
+ self._done += replicas_stored
+ self._response = response_body
+
+ def response(self):
"""
- Report that the current thread was successful.
+ Returns the body from the response to a PUT request.
"""
with self._done_lock:
- self._done += 1
+ return self._response
def done(self):
"""
class KeepWriterThread(threading.Thread):
"""
- Write a blob of data to the given Keep server. Call
- increment_done() of the given ThreadLimiter if the write
- succeeds.
+ Write a blob of data to the given Keep server. On success, call
+ save_response() of the given ThreadLimiter to save the returned
+ locator.
"""
def __init__(self, **kwargs):
super(KeepClient.KeepWriterThread, self).__init__()
(str(threading.current_thread()),
self.args['data_hash'],
self.args['service_root']))
-
+ replicas_stored = 1
if 'x-keep-replicas-stored' in resp:
# Tick the 'done' counter for the number of replica
# reported stored by the server, for the case that
# we're talking to a proxy or other backend that
# stores to multiple copies for us.
- replicas = int(resp['x-keep-replicas-stored'])
- while replicas > 0:
- limiter.increment_done()
- replicas -= 1
- else:
- limiter.increment_done()
- return
+ try:
+ replicas_stored = int(resp['x-keep-replicas-stored'])
+ except ValueError:
+ pass
+ return limiter.save_response(content.strip(), replicas_stored)
+
logging.warning("Request fail: PUT %s => %s %s" %
(url, resp['status'], content))
except (httplib2.HttpLib2Error, httplib.HTTPException) as e:
# configuration.
keep_proxy_env = config.get("ARVADOS_KEEP_PROXY")
if keep_proxy_env != None and len(keep_proxy_env) > 0:
+
if keep_proxy_env[-1:] != '/':
keep_proxy_env += "/"
self.service_roots = [keep_proxy_env]
# selected server.
probe = int(seed[0:8], 16) % len(pool)
- print seed[0:8], int(seed[0:8], 16), len(pool), probe
-
# Append the selected server to the probe sequence and remove it
# from the pool.
pseq += [pool[probe]]
try:
for service_root in self.shuffled_service_roots(expect_hash):
- url = service_root + expect_hash
+ url = service_root + locator
api_token = config.get('ARVADOS_API_TOKEN')
headers = {'Authorization': "OAuth2 %s" % api_token,
'Accept': 'application/octet-stream'}
for location_hint in re.finditer(r'\+K@([a-z0-9]+)', locator):
instance = location_hint.group(1)
- url = 'http://keep.' + instance + '.arvadosapi.com/' + expect_hash
+ url = 'http://keep.' + instance + '.arvadosapi.com/' + locator
blob = self.get_url(url, {}, expect_hash)
if blob:
slot.set(blob)
for t in threads:
t.join()
have_copies = thread_limiter.done()
+ # If we're done, return the response from Keep
if have_copies >= want_copies:
- return (data_hash + '+' + str(len(data)))
+ return thread_limiter.response()
raise arvados.errors.KeepWriteError(
"Write fail for %s: wanted %d but wrote %d" %
(data_hash, want_copies, have_copies))
projects / arvados.git / blobdiff