242 lines
7.0 KiB
Python
242 lines
7.0 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 matrix.org
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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""" This module contains all the persistence actions done by the federation
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package.
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These actions are mostly only used by the :py:mod:`.replication` module.
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"""
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from twisted.internet import defer
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from .units import Pdu
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from synapse.util.logutils import log_function
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import copy
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import json
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import logging
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logger = logging.getLogger(__name__)
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class PduActions(object):
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""" Defines persistence actions that relate to handling PDUs.
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"""
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def __init__(self, datastore):
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self.store = datastore
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@log_function
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def persist_received(self, pdu):
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""" Persists the given `Pdu` that was received from a remote home
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server.
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Returns:
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Deferred
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"""
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return self._persist(pdu)
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@defer.inlineCallbacks
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@log_function
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def persist_outgoing(self, pdu):
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""" Persists the given `Pdu` that this home server created.
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Returns:
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Deferred
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"""
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ret = yield self._persist(pdu)
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defer.returnValue(ret)
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@log_function
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def mark_as_processed(self, pdu):
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""" Persist the fact that we have fully processed the given `Pdu`
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Returns:
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Deferred
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"""
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return self.store.mark_pdu_as_processed(pdu.pdu_id, pdu.origin)
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@defer.inlineCallbacks
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@log_function
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def populate_previous_pdus(self, pdu):
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""" Given an outgoing `Pdu` fill out its `prev_ids` key with the `Pdu`s
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that we have received.
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Returns:
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Deferred
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"""
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results = yield self.store.get_latest_pdus_in_context(pdu.context)
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pdu.prev_pdus = [(p_id, origin) for p_id, origin, _ in results]
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vs = [int(v) for _, _, v in results]
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if vs:
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pdu.depth = max(vs) + 1
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else:
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pdu.depth = 0
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@defer.inlineCallbacks
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@log_function
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def after_transaction(self, transaction_id, destination, origin):
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""" Returns all `Pdu`s that we sent to the given remote home server
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after a given transaction id.
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Returns:
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Deferred: Results in a list of `Pdu`s
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"""
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results = yield self.store.get_pdus_after_transaction(
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transaction_id,
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destination
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)
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defer.returnValue([Pdu.from_pdu_tuple(p) for p in results])
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@defer.inlineCallbacks
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@log_function
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def get_all_pdus_from_context(self, context):
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results = yield self.store.get_all_pdus_from_context(context)
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defer.returnValue([Pdu.from_pdu_tuple(p) for p in results])
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@defer.inlineCallbacks
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@log_function
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def backfill(self, context, pdu_list, limit):
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""" For a given list of PDU id and origins return the proceeding
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`limit` `Pdu`s in the given `context`.
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Returns:
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Deferred: Results in a list of `Pdu`s.
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"""
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results = yield self.store.get_backfill(
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context, pdu_list, limit
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)
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defer.returnValue([Pdu.from_pdu_tuple(p) for p in results])
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@log_function
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def is_new(self, pdu):
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""" When we receive a `Pdu` from a remote home server, we want to
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figure out whether it is `new`, i.e. it is not some historic PDU that
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we haven't seen simply because we haven't backfilled back that far.
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Returns:
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Deferred: Results in a `bool`
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"""
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return self.store.is_pdu_new(
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pdu_id=pdu.pdu_id,
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origin=pdu.origin,
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context=pdu.context,
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depth=pdu.depth
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)
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@defer.inlineCallbacks
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@log_function
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def _persist(self, pdu):
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kwargs = copy.copy(pdu.__dict__)
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unrec_keys = copy.copy(pdu.unrecognized_keys)
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del kwargs["content"]
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kwargs["content_json"] = json.dumps(pdu.content)
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kwargs["unrecognized_keys"] = json.dumps(unrec_keys)
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logger.debug("Persisting: %s", repr(kwargs))
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if pdu.is_state:
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ret = yield self.store.persist_state(**kwargs)
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else:
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ret = yield self.store.persist_pdu(**kwargs)
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yield self.store.update_min_depth_for_context(
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pdu.context, pdu.depth
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)
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defer.returnValue(ret)
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class TransactionActions(object):
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""" Defines persistence actions that relate to handling Transactions.
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"""
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def __init__(self, datastore):
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self.store = datastore
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@log_function
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def have_responded(self, transaction):
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""" Have we already responded to a transaction with the same id and
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origin?
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Returns:
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Deferred: Results in `None` if we have not previously responded to
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this transaction or a 2-tuple of `(int, dict)` representing the
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response code and response body.
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"""
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if not transaction.transaction_id:
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raise RuntimeError("Cannot persist a transaction with no "
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"transaction_id")
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return self.store.get_received_txn_response(
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transaction.transaction_id, transaction.origin
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)
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@log_function
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def set_response(self, transaction, code, response):
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""" Persist how we responded to a transaction.
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Returns:
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Deferred
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"""
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if not transaction.transaction_id:
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raise RuntimeError("Cannot persist a transaction with no "
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"transaction_id")
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return self.store.set_received_txn_response(
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transaction.transaction_id,
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transaction.origin,
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code,
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json.dumps(response)
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)
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@defer.inlineCallbacks
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@log_function
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def prepare_to_send(self, transaction):
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""" Persists the `Transaction` we are about to send and works out the
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correct value for the `prev_ids` key.
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Returns:
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Deferred
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"""
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transaction.prev_ids = yield self.store.prep_send_transaction(
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transaction.transaction_id,
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transaction.destination,
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transaction.ts,
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[(p["pdu_id"], p["origin"]) for p in transaction.pdus]
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)
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@log_function
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def delivered(self, transaction, response_code, response_dict):
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""" Marks the given `Transaction` as having been successfully
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delivered to the remote homeserver, and what the response was.
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Returns:
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Deferred
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"""
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return self.store.delivered_txn(
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transaction.transaction_id,
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transaction.destination,
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response_code,
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json.dumps(response_dict)
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)
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