def send_command(self, cmd: Command):
"""Send a command if connection has been established.
Args:
cmd (Command)
"""
string = "%s %s" % (cmd.NAME, cmd.to_line())
if "\n" in string:
raise Exception("Unexpected newline in command: %r", string)
encoded_string = string.encode("utf-8")
# We use "redis" as the name here as we don't have 1:1 connections to
# remote instances.
tcp_outbound_commands_counter.labels(cmd.NAME, "redis").inc()
async def _send():
with PreserveLoggingContext():
# Note that we use the other connection as we can't send
# commands using the subscription connection.
await self.outbound_redis_connection.publish(
self.stream_name, encoded_string
)
run_as_background_process("send-cmd", _send)
def send_command(self, cmd: Command, do_buffer: bool = True) -> None:
"""Send a command if connection has been established.
Args:
cmd
do_buffer: Whether to buffer the message or always attempt
to send the command. This is mostly used to send an error
message if we're about to close the connection due our buffers
becoming full.
"""
if self.state == ConnectionStates.CLOSED:
logger.debug("[%s] Not sending, connection closed", self.id())
return
if do_buffer and self.state != ConnectionStates.ESTABLISHED:
self._queue_command(cmd)
return
tcp_outbound_commands_counter.labels(cmd.NAME, self.name).inc()
string = "%s %s" % (cmd.NAME, cmd.to_line())
if "\n" in string:
raise Exception("Unexpected newline in command: %r", string)
encoded_string = string.encode("utf-8")
if len(encoded_string) > self.MAX_LENGTH:
raise Exception("Failed to send command %s as too long (%d > %d)" %
(cmd.NAME, len(encoded_string), self.MAX_LENGTH))
self.sendLine(encoded_string)
self.last_sent_command = self.clock.time_msec()
async def _async_send_command(self, cmd: Command):
"""Encode a replication command and send it over our outbound connection"""
string = "%s %s" % (cmd.NAME, cmd.to_line())
if "\n" in string:
raise Exception("Unexpected newline in command: %r", string)
encoded_string = string.encode("utf-8")
# We use "redis" as the name here as we don't have 1:1 connections to
# remote instances.
tcp_outbound_commands_counter.labels(cmd.NAME, "redis").inc()
await make_deferred_yieldable(
self.synapse_outbound_redis_connection.publish(
self.synapse_stream_name, encoded_string))