summary refs log tree commit diff
path: root/synapse/federation/persistence.py
blob: 4cf72b2e42218189b6968edb412c0e7114cdad44 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
# -*- coding: utf-8 -*-
# Copyright 2014 matrix.org
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

""" This module contains all the persistence actions done by the federation
package.

These actions are mostly only used by the :py:mod:`.replication` module.
"""

from twisted.internet import defer

from .units import Pdu

from synapse.util.logutils import log_function

import json
import logging


logger = logging.getLogger(__name__)


class PduActions(object):
    """ Defines persistence actions that relate to handling PDUs.
    """

    def __init__(self, datastore):
        self.store = datastore

    @log_function
    def mark_as_processed(self, pdu):
        """ Persist the fact that we have fully processed the given `Pdu`

        Returns:
            Deferred
        """
        return self.store.mark_pdu_as_processed(pdu.pdu_id, pdu.origin)

    @defer.inlineCallbacks
    @log_function
    def after_transaction(self, transaction_id, destination, origin):
        """ Returns all `Pdu`s that we sent to the given remote home server
        after a given transaction id.

        Returns:
            Deferred: Results in a list of `Pdu`s
        """
        results = yield self.store.get_pdus_after_transaction(
            transaction_id,
            destination
        )

        defer.returnValue([Pdu.from_pdu_tuple(p) for p in results])

    @defer.inlineCallbacks
    @log_function
    def get_all_pdus_from_context(self, context):
        results = yield self.store.get_all_pdus_from_context(context)
        defer.returnValue([Pdu.from_pdu_tuple(p) for p in results])

    @defer.inlineCallbacks
    @log_function
    def backfill(self, context, pdu_list, limit):
        """ For a given list of PDU id and origins return the proceeding
        `limit` `Pdu`s in the given `context`.

        Returns:
            Deferred: Results in a list of `Pdu`s.
        """
        results = yield self.store.get_backfill(
            context, pdu_list, limit
        )

        defer.returnValue([Pdu.from_pdu_tuple(p) for p in results])

    @log_function
    def is_new(self, pdu):
        """ When we receive a `Pdu` from a remote home server, we want to
        figure out whether it is `new`, i.e. it is not some historic PDU that
        we haven't seen simply because we haven't backfilled back that far.

        Returns:
            Deferred: Results in a `bool`
        """
        return self.store.is_pdu_new(
            pdu_id=pdu.pdu_id,
            origin=pdu.origin,
            context=pdu.context,
            depth=pdu.depth
        )


class TransactionActions(object):
    """ Defines persistence actions that relate to handling Transactions.
    """

    def __init__(self, datastore):
        self.store = datastore

    @log_function
    def have_responded(self, transaction):
        """ Have we already responded to a transaction with the same id and
        origin?

        Returns:
            Deferred: Results in `None` if we have not previously responded to
            this transaction or a 2-tuple of `(int, dict)` representing the
            response code and response body.
        """
        if not transaction.transaction_id:
            raise RuntimeError("Cannot persist a transaction with no "
                               "transaction_id")

        return self.store.get_received_txn_response(
            transaction.transaction_id, transaction.origin
        )

    @log_function
    def set_response(self, transaction, code, response):
        """ Persist how we responded to a transaction.

        Returns:
            Deferred
        """
        if not transaction.transaction_id:
            raise RuntimeError("Cannot persist a transaction with no "
                               "transaction_id")

        return self.store.set_received_txn_response(
            transaction.transaction_id,
            transaction.origin,
            code,
            json.dumps(response)
        )

    @defer.inlineCallbacks
    @log_function
    def prepare_to_send(self, transaction):
        """ Persists the `Transaction` we are about to send and works out the
        correct value for the `prev_ids` key.

        Returns:
            Deferred
        """
        transaction.prev_ids = yield self.store.prep_send_transaction(
            transaction.transaction_id,
            transaction.destination,
            transaction.ts,
            [(p["pdu_id"], p["origin"]) for p in transaction.pdus]
        )

    @log_function
    def delivered(self, transaction, response_code, response_dict):
        """ Marks the given `Transaction` as having been successfully
        delivered to the remote homeserver, and what the response was.

        Returns:
            Deferred
        """
        return self.store.delivered_txn(
            transaction.transaction_id,
            transaction.destination,
            response_code,
            json.dumps(response_dict)
        )