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1de26b3467
Instead of wrapping the JSON into an object, this creates concrete instances for Transaction and Edu. This allows for improved type hints and simplified code.
105 lines
2.9 KiB
Python
105 lines
2.9 KiB
Python
# Copyright 2014-2016 OpenMarket Ltd
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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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""" Defines the JSON structure of the protocol units used by the server to
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server protocol.
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"""
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import logging
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from typing import List, Optional
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import attr
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from synapse.types import JsonDict
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logger = logging.getLogger(__name__)
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@attr.s(slots=True, frozen=True, auto_attribs=True)
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class Edu:
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"""An Edu represents a piece of data sent from one homeserver to another.
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In comparison to Pdus, Edus are not persisted for a long time on disk, are
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not meaningful beyond a given pair of homeservers, and don't have an
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internal ID or previous references graph.
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"""
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edu_type: str
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content: dict
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origin: str
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destination: str
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def get_dict(self) -> JsonDict:
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return {
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"edu_type": self.edu_type,
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"content": self.content,
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}
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def get_internal_dict(self) -> JsonDict:
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return {
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"edu_type": self.edu_type,
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"content": self.content,
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"origin": self.origin,
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"destination": self.destination,
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}
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def get_context(self) -> str:
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return getattr(self, "content", {}).get("org.matrix.opentracing_context", "{}")
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def strip_context(self) -> None:
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getattr(self, "content", {})["org.matrix.opentracing_context"] = "{}"
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def _none_to_list(edus: Optional[List[JsonDict]]) -> List[JsonDict]:
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if edus is None:
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return []
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return edus
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@attr.s(slots=True, frozen=True, auto_attribs=True)
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class Transaction:
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"""A transaction is a list of Pdus and Edus to be sent to a remote home
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server with some extra metadata.
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Example transaction::
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{
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"origin": "foo",
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"prev_ids": ["abc", "def"],
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"pdus": [
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...
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],
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}
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"""
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# Required keys.
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transaction_id: str
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origin: str
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destination: str
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origin_server_ts: int
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pdus: List[JsonDict] = attr.ib(factory=list, converter=_none_to_list)
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edus: List[JsonDict] = attr.ib(factory=list, converter=_none_to_list)
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def get_dict(self) -> JsonDict:
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"""A JSON-ready dictionary of valid keys which aren't internal."""
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result = {
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"origin": self.origin,
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"origin_server_ts": self.origin_server_ts,
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"pdus": self.pdus,
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}
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if self.edus:
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result["edus"] = self.edus
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return result
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