916 lines
27 KiB
Python
916 lines
27 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 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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from twisted.internet import defer
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from ._base import SQLBaseStore, Table, JoinHelper
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from synapse.federation.units import Pdu
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from synapse.util.logutils import log_function
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from collections import namedtuple
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import logging
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logger = logging.getLogger(__name__)
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class PduStore(SQLBaseStore):
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"""A collection of queries for handling PDUs.
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"""
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def get_pdu(self, pdu_id, origin):
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"""Given a pdu_id and origin, get a PDU.
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Args:
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txn
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pdu_id (str)
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origin (str)
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Returns:
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PduTuple: If the pdu does not exist in the database, returns None
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"""
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return self.runInteraction(
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self._get_pdu_tuple, pdu_id, origin
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)
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def _get_pdu_tuple(self, txn, pdu_id, origin):
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res = self._get_pdu_tuples(txn, [(pdu_id, origin)])
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return res[0] if res else None
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def _get_pdu_tuples(self, txn, pdu_id_tuples):
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results = []
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for pdu_id, origin in pdu_id_tuples:
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txn.execute(
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PduEdgesTable.select_statement("pdu_id = ? AND origin = ?"),
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(pdu_id, origin)
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)
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edges = [
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(r.prev_pdu_id, r.prev_origin)
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for r in PduEdgesTable.decode_results(txn.fetchall())
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]
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query = (
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"SELECT %(fields)s FROM %(pdus)s as p "
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"LEFT JOIN %(state)s as s "
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"ON p.pdu_id = s.pdu_id AND p.origin = s.origin "
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"WHERE p.pdu_id = ? AND p.origin = ? "
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) % {
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"fields": _pdu_state_joiner.get_fields(
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PdusTable="p", StatePdusTable="s"),
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"pdus": PdusTable.table_name,
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"state": StatePdusTable.table_name,
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}
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txn.execute(query, (pdu_id, origin))
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row = txn.fetchone()
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if row:
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results.append(PduTuple(PduEntry(*row), edges))
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return results
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def get_current_state_for_context(self, context):
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"""Get a list of PDUs that represent the current state for a given
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context
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Args:
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context (str)
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Returns:
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list: A list of PduTuples
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"""
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return self.runInteraction(
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self._get_current_state_for_context,
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context
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)
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def _get_current_state_for_context(self, txn, context):
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query = (
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"SELECT pdu_id, origin FROM %s WHERE context = ?"
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% CurrentStateTable.table_name
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)
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logger.debug("get_current_state %s, Args=%s", query, context)
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txn.execute(query, (context,))
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res = txn.fetchall()
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logger.debug("get_current_state %d results", len(res))
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return self._get_pdu_tuples(txn, res)
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def _persist_pdu_txn(self, txn, prev_pdus, cols):
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"""Inserts a (non-state) PDU into the database.
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Args:
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txn,
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prev_pdus (list)
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**cols: The columns to insert into the PdusTable.
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"""
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entry = PdusTable.EntryType(
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**{k: cols.get(k, None) for k in PdusTable.fields}
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)
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txn.execute(PdusTable.insert_statement(), entry)
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self._handle_prev_pdus(
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txn, entry.outlier, entry.pdu_id, entry.origin,
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prev_pdus, entry.context
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)
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def mark_pdu_as_processed(self, pdu_id, pdu_origin):
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"""Mark a received PDU as processed.
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Args:
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txn
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pdu_id (str)
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pdu_origin (str)
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"""
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return self.runInteraction(
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self._mark_as_processed, pdu_id, pdu_origin
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)
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def _mark_as_processed(self, txn, pdu_id, pdu_origin):
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txn.execute("UPDATE %s SET have_processed = 1" % PdusTable.table_name)
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def get_all_pdus_from_context(self, context):
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"""Get a list of all PDUs for a given context."""
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return self.runInteraction(
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self._get_all_pdus_from_context, context,
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)
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def _get_all_pdus_from_context(self, txn, context):
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query = (
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"SELECT pdu_id, origin FROM %s "
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"WHERE context = ?"
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) % PdusTable.table_name
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txn.execute(query, (context,))
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return self._get_pdu_tuples(txn, txn.fetchall())
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def get_backfill(self, context, pdu_list, limit):
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"""Get a list of Pdus for a given topic that occured before (and
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including) the pdus in pdu_list. Return a list of max size `limit`.
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Args:
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txn
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context (str)
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pdu_list (list)
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limit (int)
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Return:
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list: A list of PduTuples
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"""
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return self.runInteraction(
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self._get_backfill, context, pdu_list, limit
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)
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def _get_backfill(self, txn, context, pdu_list, limit):
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logger.debug(
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"backfill: %s, %s, %s",
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context, repr(pdu_list), limit
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)
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# We seed the pdu_results with the things from the pdu_list.
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pdu_results = pdu_list
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front = pdu_list
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query = (
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"SELECT prev_pdu_id, prev_origin FROM %(edges_table)s "
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"WHERE context = ? AND pdu_id = ? AND origin = ? "
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"LIMIT ?"
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) % {
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"edges_table": PduEdgesTable.table_name,
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}
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# We iterate through all pdu_ids in `front` to select their previous
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# pdus. These are dumped in `new_front`. We continue until we reach the
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# limit *or* new_front is empty (i.e., we've run out of things to
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# select
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while front and len(pdu_results) < limit:
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new_front = []
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for pdu_id, origin in front:
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logger.debug(
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"_backfill_interaction: i=%s, o=%s",
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pdu_id, origin
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)
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txn.execute(
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query,
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(context, pdu_id, origin, limit - len(pdu_results))
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)
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for row in txn.fetchall():
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logger.debug(
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"_backfill_interaction: got i=%s, o=%s",
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*row
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)
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new_front.append(row)
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front = new_front
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pdu_results += new_front
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# We also want to update the `prev_pdus` attributes before returning.
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return self._get_pdu_tuples(txn, pdu_results)
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def get_min_depth_for_context(self, context):
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"""Get the current minimum depth for a context
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Args:
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txn
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context (str)
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"""
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return self.runInteraction(
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self._get_min_depth_for_context, context
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)
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def _get_min_depth_for_context(self, txn, context):
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return self._get_min_depth_interaction(txn, context)
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def _get_min_depth_interaction(self, txn, context):
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txn.execute(
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"SELECT min_depth FROM %s WHERE context = ?"
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% ContextDepthTable.table_name,
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(context,)
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)
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row = txn.fetchone()
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return row[0] if row else None
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def _update_min_depth_for_context_txn(self, txn, context, depth):
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"""Update the minimum `depth` of the given context, which is the line
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on which we stop backfilling backwards.
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Args:
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context (str)
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depth (int)
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"""
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min_depth = self._get_min_depth_interaction(txn, context)
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do_insert = depth < min_depth if min_depth else True
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if do_insert:
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txn.execute(
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"INSERT OR REPLACE INTO %s (context, min_depth) "
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"VALUES (?,?)" % ContextDepthTable.table_name,
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(context, depth)
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)
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def _get_latest_pdus_in_context(self, txn, context):
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"""Get's a list of the most current pdus for a given context. This is
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used when we are sending a Pdu and need to fill out the `prev_pdus`
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key
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Args:
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txn
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context
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"""
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query = (
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"SELECT p.pdu_id, p.origin, p.depth FROM %(pdus)s as p "
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"INNER JOIN %(forward)s as f ON p.pdu_id = f.pdu_id "
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"AND f.origin = p.origin "
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"WHERE f.context = ?"
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) % {
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"pdus": PdusTable.table_name,
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"forward": PduForwardExtremitiesTable.table_name,
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}
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logger.debug("get_prev query: %s", query)
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txn.execute(
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query,
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(context, )
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)
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results = txn.fetchall()
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return [(row[0], row[1], row[2]) for row in results]
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@defer.inlineCallbacks
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def get_oldest_pdus_in_context(self, context):
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"""Get a list of Pdus that we haven't backfilled beyond yet (and havent
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seen). This list is used when we want to backfill backwards and is the
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list we send to the remote server.
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Args:
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txn
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context (str)
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Returns:
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list: A list of PduIdTuple.
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"""
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results = yield self._execute(
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None,
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"SELECT pdu_id, origin FROM %(back)s WHERE context = ?"
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% {"back": PduBackwardExtremitiesTable.table_name, },
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context
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)
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defer.returnValue([PduIdTuple(i, o) for i, o in results])
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def is_pdu_new(self, pdu_id, origin, context, depth):
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"""For a given Pdu, try and figure out if it's 'new', i.e., if it's
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not something we got randomly from the past, for example when we
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request the current state of the room that will probably return a bunch
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of pdus from before we joined.
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Args:
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txn
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pdu_id (str)
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origin (str)
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context (str)
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depth (int)
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Returns:
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bool
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"""
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return self.runInteraction(
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self._is_pdu_new,
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pdu_id=pdu_id,
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origin=origin,
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context=context,
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depth=depth
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)
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def _is_pdu_new(self, txn, pdu_id, origin, context, depth):
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# If depth > min depth in back table, then we classify it as new.
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# OR if there is nothing in the back table, then it kinda needs to
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# be a new thing.
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query = (
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"SELECT min(p.depth) FROM %(edges)s as e "
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"INNER JOIN %(back)s as b "
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"ON e.prev_pdu_id = b.pdu_id AND e.prev_origin = b.origin "
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"INNER JOIN %(pdus)s as p "
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"ON e.pdu_id = p.pdu_id AND p.origin = e.origin "
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"WHERE p.context = ?"
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) % {
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"pdus": PdusTable.table_name,
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"edges": PduEdgesTable.table_name,
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"back": PduBackwardExtremitiesTable.table_name,
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}
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txn.execute(query, (context,))
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min_depth, = txn.fetchone()
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if not min_depth or depth > int(min_depth):
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logger.debug(
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"is_new true: id=%s, o=%s, d=%s min_depth=%s",
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pdu_id, origin, depth, min_depth
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)
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return True
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# If this pdu is in the forwards table, then it also is a new one
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query = (
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"SELECT * FROM %(forward)s WHERE pdu_id = ? AND origin = ?"
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) % {
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"forward": PduForwardExtremitiesTable.table_name,
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}
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txn.execute(query, (pdu_id, origin))
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# Did we get anything?
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if txn.fetchall():
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logger.debug(
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"is_new true: id=%s, o=%s, d=%s was forward",
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pdu_id, origin, depth
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)
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return True
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logger.debug(
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"is_new false: id=%s, o=%s, d=%s",
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pdu_id, origin, depth
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)
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# FINE THEN. It's probably old.
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return False
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@staticmethod
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@log_function
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def _handle_prev_pdus(txn, outlier, pdu_id, origin, prev_pdus,
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context):
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txn.executemany(
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PduEdgesTable.insert_statement(),
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[(pdu_id, origin, p[0], p[1], context) for p in prev_pdus]
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)
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# Update the extremities table if this is not an outlier.
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if not outlier:
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# First, we delete the new one from the forwards extremities table.
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query = (
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"DELETE FROM %s WHERE pdu_id = ? AND origin = ?"
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% PduForwardExtremitiesTable.table_name
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)
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txn.executemany(query, prev_pdus)
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# We only insert as a forward extremety the new pdu if there are no
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# other pdus that reference it as a prev pdu
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query = (
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"INSERT INTO %(table)s (pdu_id, origin, context) "
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"SELECT ?, ?, ? WHERE NOT EXISTS ("
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"SELECT 1 FROM %(pdu_edges)s WHERE "
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"prev_pdu_id = ? AND prev_origin = ?"
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")"
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) % {
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"table": PduForwardExtremitiesTable.table_name,
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"pdu_edges": PduEdgesTable.table_name
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}
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logger.debug("query: %s", query)
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txn.execute(query, (pdu_id, origin, context, pdu_id, origin))
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# Insert all the prev_pdus as a backwards thing, they'll get
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# deleted in a second if they're incorrect anyway.
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txn.executemany(
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PduBackwardExtremitiesTable.insert_statement(),
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[(i, o, context) for i, o in prev_pdus]
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)
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# Also delete from the backwards extremities table all ones that
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# reference pdus that we have already seen
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query = (
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"DELETE FROM %(pdu_back)s WHERE EXISTS ("
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"SELECT 1 FROM %(pdus)s AS pdus "
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"WHERE "
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"%(pdu_back)s.pdu_id = pdus.pdu_id "
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"AND %(pdu_back)s.origin = pdus.origin "
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"AND not pdus.outlier "
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")"
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) % {
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"pdu_back": PduBackwardExtremitiesTable.table_name,
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"pdus": PdusTable.table_name,
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}
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txn.execute(query)
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|
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class StatePduStore(SQLBaseStore):
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"""A collection of queries for handling state PDUs.
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"""
|
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def _persist_state_txn(self, txn, prev_pdus, cols):
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"""Inserts a state PDU into the database
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Args:
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txn,
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prev_pdus (list)
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**cols: The columns to insert into the PdusTable and StatePdusTable
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"""
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pdu_entry = PdusTable.EntryType(
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**{k: cols.get(k, None) for k in PdusTable.fields}
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)
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state_entry = StatePdusTable.EntryType(
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**{k: cols.get(k, None) for k in StatePdusTable.fields}
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)
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logger.debug("Inserting pdu: %s", repr(pdu_entry))
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logger.debug("Inserting state: %s", repr(state_entry))
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txn.execute(PdusTable.insert_statement(), pdu_entry)
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txn.execute(StatePdusTable.insert_statement(), state_entry)
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self._handle_prev_pdus(
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txn,
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pdu_entry.outlier, pdu_entry.pdu_id, pdu_entry.origin, prev_pdus,
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pdu_entry.context
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)
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def get_unresolved_state_tree(self, new_state_pdu):
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return self.runInteraction(
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self._get_unresolved_state_tree, new_state_pdu
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)
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@log_function
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def _get_unresolved_state_tree(self, txn, new_pdu):
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current = self._get_current_interaction(
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txn,
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new_pdu.context, new_pdu.pdu_type, new_pdu.state_key
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)
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ReturnType = namedtuple(
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"StateReturnType", ["new_branch", "current_branch"]
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)
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return_value = ReturnType([new_pdu], [])
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if not current:
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logger.debug("get_unresolved_state_tree No current state.")
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return (return_value, None)
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return_value.current_branch.append(current)
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enum_branches = self._enumerate_state_branches(
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txn, new_pdu, current
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)
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missing_branch = None
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for branch, prev_state, state in enum_branches:
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if state:
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return_value[branch].append(state)
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else:
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# We don't have prev_state :(
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missing_branch = branch
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break
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return (return_value, missing_branch)
|
|
|
|
def update_current_state(self, pdu_id, origin, context, pdu_type,
|
|
state_key):
|
|
return self.runInteraction(
|
|
self._update_current_state,
|
|
pdu_id, origin, context, pdu_type, state_key
|
|
)
|
|
|
|
def _update_current_state(self, txn, pdu_id, origin, context, pdu_type,
|
|
state_key):
|
|
query = (
|
|
"INSERT OR REPLACE INTO %(curr)s (%(fields)s) VALUES (%(qs)s)"
|
|
) % {
|
|
"curr": CurrentStateTable.table_name,
|
|
"fields": CurrentStateTable.get_fields_string(),
|
|
"qs": ", ".join(["?"] * len(CurrentStateTable.fields))
|
|
}
|
|
|
|
query_args = CurrentStateTable.EntryType(
|
|
pdu_id=pdu_id,
|
|
origin=origin,
|
|
context=context,
|
|
pdu_type=pdu_type,
|
|
state_key=state_key
|
|
)
|
|
|
|
txn.execute(query, query_args)
|
|
|
|
def get_current_state_pdu(self, context, pdu_type, state_key):
|
|
"""For a given context, pdu_type, state_key 3-tuple, return what is
|
|
currently considered the current state.
|
|
|
|
Args:
|
|
txn
|
|
context (str)
|
|
pdu_type (str)
|
|
state_key (str)
|
|
|
|
Returns:
|
|
PduEntry
|
|
"""
|
|
|
|
return self.runInteraction(
|
|
self._get_current_state_pdu, context, pdu_type, state_key
|
|
)
|
|
|
|
def _get_current_state_pdu(self, txn, context, pdu_type, state_key):
|
|
return self._get_current_interaction(txn, context, pdu_type, state_key)
|
|
|
|
def _get_current_interaction(self, txn, context, pdu_type, state_key):
|
|
logger.debug(
|
|
"_get_current_interaction %s %s %s",
|
|
context, pdu_type, state_key
|
|
)
|
|
|
|
fields = _pdu_state_joiner.get_fields(
|
|
PdusTable="p", StatePdusTable="s")
|
|
|
|
current_query = (
|
|
"SELECT %(fields)s FROM %(state)s as s "
|
|
"INNER JOIN %(pdus)s as p "
|
|
"ON s.pdu_id = p.pdu_id AND s.origin = p.origin "
|
|
"INNER JOIN %(curr)s as c "
|
|
"ON s.pdu_id = c.pdu_id AND s.origin = c.origin "
|
|
"WHERE s.context = ? AND s.pdu_type = ? AND s.state_key = ? "
|
|
) % {
|
|
"fields": fields,
|
|
"curr": CurrentStateTable.table_name,
|
|
"state": StatePdusTable.table_name,
|
|
"pdus": PdusTable.table_name,
|
|
}
|
|
|
|
txn.execute(
|
|
current_query,
|
|
(context, pdu_type, state_key)
|
|
)
|
|
|
|
row = txn.fetchone()
|
|
|
|
result = PduEntry(*row) if row else None
|
|
|
|
if not result:
|
|
logger.debug("_get_current_interaction not found")
|
|
else:
|
|
logger.debug(
|
|
"_get_current_interaction found %s %s",
|
|
result.pdu_id, result.origin
|
|
)
|
|
|
|
return result
|
|
|
|
def handle_new_state(self, new_pdu):
|
|
"""Actually perform conflict resolution on the new_pdu on the
|
|
assumption we have all the pdus required to perform it.
|
|
|
|
Args:
|
|
new_pdu
|
|
|
|
Returns:
|
|
bool: True if the new_pdu clobbered the current state, False if not
|
|
"""
|
|
return self.runInteraction(
|
|
self._handle_new_state, new_pdu
|
|
)
|
|
|
|
def _handle_new_state(self, txn, new_pdu):
|
|
logger.debug(
|
|
"handle_new_state %s %s",
|
|
new_pdu.pdu_id, new_pdu.origin
|
|
)
|
|
|
|
current = self._get_current_interaction(
|
|
txn,
|
|
new_pdu.context, new_pdu.pdu_type, new_pdu.state_key
|
|
)
|
|
|
|
is_current = False
|
|
|
|
if (not current or not current.prev_state_id
|
|
or not current.prev_state_origin):
|
|
# Oh, we don't have any state for this yet.
|
|
is_current = True
|
|
elif (current.pdu_id == new_pdu.prev_state_id
|
|
and current.origin == new_pdu.prev_state_origin):
|
|
# Oh! A direct clobber. Just do it.
|
|
is_current = True
|
|
else:
|
|
##
|
|
# Ok, now loop through until we get to a common ancestor.
|
|
max_new = int(new_pdu.power_level)
|
|
max_current = int(current.power_level)
|
|
|
|
enum_branches = self._enumerate_state_branches(
|
|
txn, new_pdu, current
|
|
)
|
|
for branch, prev_state, state in enum_branches:
|
|
if not state:
|
|
raise RuntimeError(
|
|
"Could not find state_pdu %s %s" %
|
|
(
|
|
prev_state.prev_state_id,
|
|
prev_state.prev_state_origin
|
|
)
|
|
)
|
|
|
|
if branch == 0:
|
|
max_new = max(int(state.depth), max_new)
|
|
else:
|
|
max_current = max(int(state.depth), max_current)
|
|
|
|
is_current = max_new > max_current
|
|
|
|
if is_current:
|
|
logger.debug("handle_new_state make current")
|
|
|
|
# Right, this is a new thing, so woo, just insert it.
|
|
txn.execute(
|
|
"INSERT OR REPLACE INTO %(curr)s (%(fields)s) VALUES (%(qs)s)"
|
|
% {
|
|
"curr": CurrentStateTable.table_name,
|
|
"fields": CurrentStateTable.get_fields_string(),
|
|
"qs": ", ".join(["?"] * len(CurrentStateTable.fields))
|
|
},
|
|
CurrentStateTable.EntryType(
|
|
*(new_pdu.__dict__[k] for k in CurrentStateTable.fields)
|
|
)
|
|
)
|
|
else:
|
|
logger.debug("handle_new_state not current")
|
|
|
|
logger.debug("handle_new_state done")
|
|
|
|
return is_current
|
|
|
|
@log_function
|
|
def _enumerate_state_branches(self, txn, pdu_a, pdu_b):
|
|
branch_a = pdu_a
|
|
branch_b = pdu_b
|
|
|
|
while True:
|
|
if (branch_a.pdu_id == branch_b.pdu_id
|
|
and branch_a.origin == branch_b.origin):
|
|
# Woo! We found a common ancestor
|
|
logger.debug("_enumerate_state_branches Found common ancestor")
|
|
break
|
|
|
|
do_branch_a = (
|
|
hasattr(branch_a, "prev_state_id") and
|
|
branch_a.prev_state_id
|
|
)
|
|
|
|
do_branch_b = (
|
|
hasattr(branch_b, "prev_state_id") and
|
|
branch_b.prev_state_id
|
|
)
|
|
|
|
logger.debug(
|
|
"do_branch_a=%s, do_branch_b=%s",
|
|
do_branch_a, do_branch_b
|
|
)
|
|
|
|
if do_branch_a and do_branch_b:
|
|
do_branch_a = int(branch_a.depth) > int(branch_b.depth)
|
|
|
|
if do_branch_a:
|
|
pdu_tuple = PduIdTuple(
|
|
branch_a.prev_state_id,
|
|
branch_a.prev_state_origin
|
|
)
|
|
|
|
prev_branch = branch_a
|
|
|
|
logger.debug("getting branch_a prev %s", pdu_tuple)
|
|
branch_a = self._get_pdu_tuple(txn, *pdu_tuple)
|
|
if branch_a:
|
|
branch_a = Pdu.from_pdu_tuple(branch_a)
|
|
|
|
logger.debug("branch_a=%s", branch_a)
|
|
|
|
yield (0, prev_branch, branch_a)
|
|
|
|
if not branch_a:
|
|
break
|
|
elif do_branch_b:
|
|
pdu_tuple = PduIdTuple(
|
|
branch_b.prev_state_id,
|
|
branch_b.prev_state_origin
|
|
)
|
|
|
|
prev_branch = branch_b
|
|
|
|
logger.debug("getting branch_b prev %s", pdu_tuple)
|
|
branch_b = self._get_pdu_tuple(txn, *pdu_tuple)
|
|
if branch_b:
|
|
branch_b = Pdu.from_pdu_tuple(branch_b)
|
|
|
|
logger.debug("branch_b=%s", branch_b)
|
|
|
|
yield (1, prev_branch, branch_b)
|
|
|
|
if not branch_b:
|
|
break
|
|
else:
|
|
break
|
|
|
|
|
|
class PdusTable(Table):
|
|
table_name = "pdus"
|
|
|
|
fields = [
|
|
"pdu_id",
|
|
"origin",
|
|
"context",
|
|
"pdu_type",
|
|
"ts",
|
|
"depth",
|
|
"is_state",
|
|
"content_json",
|
|
"unrecognized_keys",
|
|
"outlier",
|
|
"have_processed",
|
|
]
|
|
|
|
EntryType = namedtuple("PdusEntry", fields)
|
|
|
|
|
|
class PduDestinationsTable(Table):
|
|
table_name = "pdu_destinations"
|
|
|
|
fields = [
|
|
"pdu_id",
|
|
"origin",
|
|
"destination",
|
|
"delivered_ts",
|
|
]
|
|
|
|
EntryType = namedtuple("PduDestinationsEntry", fields)
|
|
|
|
|
|
class PduEdgesTable(Table):
|
|
table_name = "pdu_edges"
|
|
|
|
fields = [
|
|
"pdu_id",
|
|
"origin",
|
|
"prev_pdu_id",
|
|
"prev_origin",
|
|
"context"
|
|
]
|
|
|
|
EntryType = namedtuple("PduEdgesEntry", fields)
|
|
|
|
|
|
class PduForwardExtremitiesTable(Table):
|
|
table_name = "pdu_forward_extremities"
|
|
|
|
fields = [
|
|
"pdu_id",
|
|
"origin",
|
|
"context",
|
|
]
|
|
|
|
EntryType = namedtuple("PduForwardExtremitiesEntry", fields)
|
|
|
|
|
|
class PduBackwardExtremitiesTable(Table):
|
|
table_name = "pdu_backward_extremities"
|
|
|
|
fields = [
|
|
"pdu_id",
|
|
"origin",
|
|
"context",
|
|
]
|
|
|
|
EntryType = namedtuple("PduBackwardExtremitiesEntry", fields)
|
|
|
|
|
|
class ContextDepthTable(Table):
|
|
table_name = "context_depth"
|
|
|
|
fields = [
|
|
"context",
|
|
"min_depth",
|
|
]
|
|
|
|
EntryType = namedtuple("ContextDepthEntry", fields)
|
|
|
|
|
|
class StatePdusTable(Table):
|
|
table_name = "state_pdus"
|
|
|
|
fields = [
|
|
"pdu_id",
|
|
"origin",
|
|
"context",
|
|
"pdu_type",
|
|
"state_key",
|
|
"power_level",
|
|
"prev_state_id",
|
|
"prev_state_origin",
|
|
]
|
|
|
|
EntryType = namedtuple("StatePdusEntry", fields)
|
|
|
|
|
|
class CurrentStateTable(Table):
|
|
table_name = "current_state"
|
|
|
|
fields = [
|
|
"pdu_id",
|
|
"origin",
|
|
"context",
|
|
"pdu_type",
|
|
"state_key",
|
|
]
|
|
|
|
EntryType = namedtuple("CurrentStateEntry", fields)
|
|
|
|
_pdu_state_joiner = JoinHelper(PdusTable, StatePdusTable)
|
|
|
|
|
|
# TODO: These should probably be put somewhere more sensible
|
|
PduIdTuple = namedtuple("PduIdTuple", ("pdu_id", "origin"))
|
|
|
|
PduEntry = _pdu_state_joiner.EntryType
|
|
""" We are always interested in the join of the PdusTable and StatePdusTable,
|
|
rather than just the PdusTable.
|
|
|
|
This does not include a prev_pdus key.
|
|
"""
|
|
|
|
PduTuple = namedtuple(
|
|
"PduTuple",
|
|
("pdu_entry", "prev_pdu_list")
|
|
)
|
|
""" This is a tuple of a `PduEntry` and a list of `PduIdTuple` that represent
|
|
the `prev_pdus` key of a PDU.
|
|
"""
|