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author | Erik Johnston <erik@matrix.org> | 2019-11-04 13:29:35 +0000 |
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committer | Erik Johnston <erik@matrix.org> | 2019-11-04 13:29:35 +0000 |
commit | 6a0092d3715a168415619fd253c7fb4da5faf348 (patch) | |
tree | 72f8553014ff152fecd10a40cd2ad7b46387f44d /synapse/replication/tcp/protocol.py | |
parent | Fix up comment (diff) | |
parent | document the REPLICATE command a bit better (#6305) (diff) | |
download | synapse-6a0092d3715a168415619fd253c7fb4da5faf348.tar.xz |
Merge branch 'develop' of github.com:matrix-org/synapse into erikj/split_purge_history
Diffstat (limited to 'synapse/replication/tcp/protocol.py')
-rw-r--r-- | synapse/replication/tcp/protocol.py | 74 |
1 files changed, 72 insertions, 2 deletions
diff --git a/synapse/replication/tcp/protocol.py b/synapse/replication/tcp/protocol.py index b64f3f44b5..afaf002fe6 100644 --- a/synapse/replication/tcp/protocol.py +++ b/synapse/replication/tcp/protocol.py @@ -48,7 +48,7 @@ indicate which side is sending, these are *not* included on the wire:: > ERROR server stopping * connection closed by server * """ - +import abc import fcntl import logging import struct @@ -65,6 +65,7 @@ from twisted.python.failure import Failure from synapse.logging.context import make_deferred_yieldable, run_in_background from synapse.metrics import LaterGauge from synapse.metrics.background_process_metrics import run_as_background_process +from synapse.util import Clock from synapse.util.stringutils import random_string from .commands import ( @@ -558,11 +559,80 @@ class ServerReplicationStreamProtocol(BaseReplicationStreamProtocol): self.streamer.lost_connection(self) +class AbstractReplicationClientHandler(metaclass=abc.ABCMeta): + """ + The interface for the handler that should be passed to + ClientReplicationStreamProtocol + """ + + @abc.abstractmethod + def on_rdata(self, stream_name, token, rows): + """Called to handle a batch of replication data with a given stream token. + + Args: + stream_name (str): name of the replication stream for this batch of rows + token (int): stream token for this batch of rows + rows (list): a list of Stream.ROW_TYPE objects as returned by + Stream.parse_row. + + Returns: + Deferred|None + """ + raise NotImplementedError() + + @abc.abstractmethod + def on_position(self, stream_name, token): + """Called when we get new position data.""" + raise NotImplementedError() + + @abc.abstractmethod + def on_sync(self, data): + """Called when get a new SYNC command.""" + raise NotImplementedError() + + @abc.abstractmethod + def get_streams_to_replicate(self): + """Called when a new connection has been established and we need to + subscribe to streams. + + Returns: + map from stream name to the most recent update we have for + that stream (ie, the point we want to start replicating from) + """ + raise NotImplementedError() + + @abc.abstractmethod + def get_currently_syncing_users(self): + """Get the list of currently syncing users (if any). This is called + when a connection has been established and we need to send the + currently syncing users.""" + raise NotImplementedError() + + @abc.abstractmethod + def update_connection(self, connection): + """Called when a connection has been established (or lost with None). + """ + raise NotImplementedError() + + @abc.abstractmethod + def finished_connecting(self): + """Called when we have successfully subscribed and caught up to all + streams we're interested in. + """ + raise NotImplementedError() + + class ClientReplicationStreamProtocol(BaseReplicationStreamProtocol): VALID_INBOUND_COMMANDS = VALID_SERVER_COMMANDS VALID_OUTBOUND_COMMANDS = VALID_CLIENT_COMMANDS - def __init__(self, client_name, server_name, clock, handler): + def __init__( + self, + client_name: str, + server_name: str, + clock: Clock, + handler: AbstractReplicationClientHandler, + ): BaseReplicationStreamProtocol.__init__(self, clock) self.client_name = client_name |