def acquire(self):
"""
Overridden from BaseBinaryResourceLock.
"""
lock = EntropyResourcesLock(output=Server)
if self._blocking:
lock.acquire_exclusive()
acquired = True
else:
acquired = lock.wait_exclusive()
if not acquired:
raise EntropyResourceLock.NotAcquired("unable to acquire lock")
def acquire(self):
"""
Overridden from BaseBinaryResourceLock.
"""
lock = EntropyResourcesLock(output=Server)
if self._blocking:
lock.acquire_exclusive()
acquired = True
else:
acquired = lock.wait_exclusive()
if not acquired:
raise EntropyResourceLock.NotAcquired(
"unable to acquire lock")
def _call_exclusive(self, func, repo):
"""
Execute the given function at func after acquiring Entropy
Resources Lock, for given repository at repo.
The signature of func is: int func(entropy_server).
"""
server = None
server_class = None
acquired = False
lock = None
# make possible to avoid dealing with the resources lock.
# This is useful if the lock is already acquired by some
# parent or controller process.
skip_lock = os.getenv("EIT_NO_RESOURCES_LOCK") is not None
try:
try:
server_class = self._entropy_class()
except PermissionDenied as err:
print_error(err.value)
return 1
if not skip_lock:
lock = EntropyResourcesLock(output=server_class)
acquired = lock.wait_exclusive()
if not acquired:
server_class.output(darkgreen(
_("Another Entropy is currently running.")),
level="error",
importance=1)
return 1
server = server_class(default_repository=repo)
# make sure that repositories are closed now
# to reset their internal states, which could have
# become stale.
# We cannot do this inside the API because we don't
# know the lifecycle of EntropyRepository objects there.
server.close_repositories()
ServerRepositoryStatus().reset()
return func(server)
finally:
if server is not None:
server.shutdown()
if acquired:
lock.release()
def _call_exclusive(self, func, repo):
"""
Execute the given function at func after acquiring Entropy
Resources Lock, for given repository at repo.
The signature of func is: int func(entropy_server).
"""
server = None
server_class = None
acquired = False
lock = None
# make possible to avoid dealing with the resources lock.
# This is useful if the lock is already acquired by some
# parent or controller process.
skip_lock = os.getenv("EIT_NO_RESOURCES_LOCK") is not None
try:
try:
server_class = self._entropy_class()
except PermissionDenied as err:
print_error(err.value)
return 1
if not skip_lock:
lock = EntropyResourcesLock(output=server_class)
acquired = lock.wait_exclusive()
if not acquired:
server_class.output(
darkgreen(_("Another Entropy is currently running.")), level="error", importance=1
)
return 1
server = server_class(default_repository=repo)
# make sure that repositories are closed now
# to reset their internal states, which could have
# become stale.
# We cannot do this inside the API because we don't
# know the lifecycle of EntropyRepository objects there.
server.close_repositories()
ServerRepositoryStatus().reset()
return func(server)
finally:
if server is not None:
server.shutdown()
if acquired:
lock.release()
def _call_exclusive(self, func):
"""
Execute the given function at func after acquiring Entropy
Resources Lock, for given repository at repo.
The signature of func is: int func(entropy_client).
"""
client_class = None
client = None
acquired = False
lock = None
try:
try:
client_class = self._entropy_class()
except PermissionDenied as err:
print_error(err.value)
return 1
blocking = os.getenv("__EQUO_LOCKS_BLOCKING__")
if blocking:
client_class.output(darkgreen(
_("Acquiring Entropy Resources "
"Lock, please wait...")),
back=True)
lock = EntropyResourcesLock(output=client_class)
if blocking:
lock.acquire_exclusive()
acquired = True
else:
acquired = lock.wait_exclusive()
if not acquired:
client_class.output(
darkgreen(_("Another Entropy is currently running.")),
level="error", importance=1
)
return 1
client = client_class()
return func(client)
finally:
if client is not None:
client.shutdown()
if acquired:
lock.release()
def _call_exclusive(self, func):
"""
Execute the given function at func after acquiring Entropy
Resources Lock, for given repository at repo.
The signature of func is: int func(entropy_client).
"""
client_class = None
client = None
acquired = False
lock = None
try:
try:
client_class = self._entropy_class()
except PermissionDenied as err:
print_error(err.value)
return 1
blocking = os.getenv("__EQUO_LOCKS_BLOCKING__")
if blocking:
client_class.output(darkgreen(
_("Acquiring Entropy Resources "
"Lock, please wait...")),
back=True)
lock = EntropyResourcesLock(output=client_class)
if blocking:
lock.acquire_exclusive()
acquired = True
else:
acquired = lock.wait_exclusive()
if not acquired:
client_class.output(darkgreen(
_("Another Entropy is currently running.")),
level="error",
importance=1)
return 1
client = client_class()
return func(client)
finally:
if client is not None:
client.shutdown()
if acquired:
lock.release()
