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Diffstat (limited to 'src/python/_framework/base/packets/_cancellation.py')
| -rw-r--r-- | src/python/_framework/base/packets/_cancellation.py | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/python/_framework/base/packets/_cancellation.py b/src/python/_framework/base/packets/_cancellation.py new file mode 100644 index 0000000000..49172d1b97 --- /dev/null +++ b/src/python/_framework/base/packets/_cancellation.py @@ -0,0 +1,64 @@ +# Copyright 2015, Google Inc. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above +# copyright notice, this list of conditions and the following disclaimer +# in the documentation and/or other materials provided with the +# distribution. +# * Neither the name of Google Inc. nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +"""State and behavior for operation cancellation.""" + +from _framework.base.packets import _interfaces +from _framework.base.packets import packets + + +class CancellationManager(_interfaces.CancellationManager): + """An implementation of _interfaces.CancellationManager.""" + + def __init__( + self, lock, termination_manager, transmission_manager, ingestion_manager, + expiration_manager): + """Constructor. + + Args: + lock: The operation-wide lock. + termination_manager: The _interfaces.TerminationManager for the operation. + transmission_manager: The _interfaces.TransmissionManager for the + operation. + ingestion_manager: The _interfaces.IngestionManager for the operation. + expiration_manager: The _interfaces.ExpirationManager for the operation. + """ + self._lock = lock + self._termination_manager = termination_manager + self._transmission_manager = transmission_manager + self._ingestion_manager = ingestion_manager + self._expiration_manager = expiration_manager + + def cancel(self): + """See _interfaces.CancellationManager.cancel for specification.""" + with self._lock: + self._termination_manager.abort(packets.Kind.CANCELLATION) + self._transmission_manager.abort(packets.Kind.CANCELLATION) + self._ingestion_manager.abort() + self._expiration_manager.abort() |