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pubsub timeouts tuning (#295) 

* add finegrained timeouts to pubsub

* use 10 millis timeout in tests

* finalization

* revert timeouts

* use `atEof` for reads

* adjust timeouts and use atEof for reads

* use atEof for reads

* set isEof flag

* no backoff for pubsub streams

* temp timer increase, make macos finalize

* don't call `subscribePeer` in libp2p anymore

* more traces

* leak tests

* lower timeouts

* handle exceptions in control message

* don't use `cancelAndWait`

* handle exceptions in helpers

* wip

* don't send empty messages

* check for leaks properly

* don't use cancelAndWait

* don't await subscribption sends

* remove subscrivePeer calls from switch

* trying without the hooks again
This commit is contained in:
Dmitriy Ryajov 2020-08-02 23:20:11 -06:00 committed by GitHub
parent 909d9652f6
commit 980764774e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 205 additions and 87 deletions
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2
libp2p/multistream.nim
View File

@ -123,7 +123,7 @@ proc handle*(m: MultistreamSelect, conn: Connection, active: bool = false) {.asy
trace "handle: starting multistream handling", handshaked = active
var handshaked = active
try:
while not conn.closed:
while not conn.atEof:
var ms = string.fromBytes(await conn.readLp(1024))
validateSuffix(ms)

2
libp2p/muxers/mplex/lpchannel.nim
View File

@ -82,7 +82,7 @@ template withEOFExceptions(body: untyped): untyped =
proc cleanupTimer(s: LPChannel) {.async.} =
## cleanup timers
if not isNil(s.timerTaskFut) and not s.timerTaskFut.finished:
await s.timerTaskFut.cancelAndWait()
s.timerTaskFut.cancel()
proc closeMessage(s: LPChannel) {.async.} =
logScope:

5
libp2p/muxers/mplex/mplex.nim
View File

@ -117,7 +117,7 @@ method handle*(m: Mplex) {.async, gcsafe.} =
trace "stopping mplex main loop", oid = $m.oid
await m.close()
while not m.connection.closed:
while not m.connection.atEof:
trace "waiting for data", oid = $m.oid
let (id, msgType, data) = await m.connection.readMsg()
trace "read message from connection", id = id,
@ -169,7 +169,10 @@ method handle*(m: Mplex) {.async, gcsafe.} =
trace "pushing data to channel"
if data.len > MaxMsgSize:
warn "attempting to send a packet larger than allowed", allowed = MaxMsgSize,
sending = data.len
raise newLPStreamLimitError()
await channel.pushTo(data)
of MessageType.CloseIn, MessageType.CloseOut:

9
libp2p/protocols/pubsub/floodsub.nim
View File

@ -97,7 +97,7 @@ method rpcHandler*(f: FloodSub,
trace "exception in message handler", exc = exc.msg
# forward the message to all peers interested in it
let published = await f.publishHelper(toSendPeers, m.messages)
let published = await f.publishHelper(toSendPeers, m.messages, DefaultSendTimeout)
trace "forwared message to peers", peers = published
@ -120,9 +120,10 @@ method subscribePeer*(p: FloodSub,
method publish*(f: FloodSub,
topic: string,
data: seq[byte]): Future[int] {.async.} =
data: seq[byte],
timeout: Duration = InfiniteDuration): Future[int] {.async.} =
# base returns always 0
discard await procCall PubSub(f).publish(topic, data)
discard await procCall PubSub(f).publish(topic, data, timeout)
if data.len <= 0 or topic.len <= 0:
trace "topic or data missing, skipping publish"
@ -137,7 +138,7 @@ method publish*(f: FloodSub,
let msg = Message.init(f.peerInfo, data, topic, f.msgSeqno, f.sign)
# start the future but do not wait yet
let published = await f.publishHelper(f.floodsub.getOrDefault(topic), @[msg])
let published = await f.publishHelper(f.floodsub.getOrDefault(topic), @[msg], timeout)
libp2p_pubsub_messages_published.inc(labelValues = [topic])

23
libp2p/protocols/pubsub/gossipsub.nim
View File

@ -189,16 +189,14 @@ proc getGossipPeers(g: GossipSub): Table[string, ControlMessage] {.gcsafe.} =
let gossipPeers = mesh + fanout
let mids = g.mcache.window(topic)
if mids.len <= 0:
if not mids.len > 0:
continue
let ihave = ControlIHave(topicID: topic,
messageIDs: toSeq(mids))
if topic notin g.gossipsub:
trace "topic not in gossip array, skipping", topicID = topic
continue
let ihave = ControlIHave(topicID: topic, messageIDs: toSeq(mids))
for peer in allPeers:
if result.len >= GossipSubD:
trace "got gossip peers", peers = result.len
@ -422,7 +420,7 @@ method rpcHandler*(g: GossipSub,
trace "exception in message handler", exc = exc.msg
# forward the message to all peers interested in it
let published = await g.publishHelper(toSendPeers, m.messages)
let published = await g.publishHelper(toSendPeers, m.messages, DefaultSendTimeout)
trace "forwared message to peers", peers = published
@ -436,9 +434,15 @@ method rpcHandler*(g: GossipSub,
let messages = g.handleIWant(peer, control.iwant)
if respControl.graft.len > 0 or respControl.prune.len > 0 or
respControl.ihave.len > 0 or respControl.iwant.len > 0:
respControl.ihave.len > 0:
try:
info "sending control message", msg = respControl
await peer.send(
RPCMsg(control: some(respControl), messages: messages))
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "exception forwarding control messages", exc = exc.msg
method subscribe*(g: GossipSub,
topic: string,
@ -476,9 +480,10 @@ method unsubscribeAll*(g: GossipSub, topic: string) {.async.} =
method publish*(g: GossipSub,
topic: string,
data: seq[byte]): Future[int] {.async.} =
data: seq[byte],
timeout: Duration = InfiniteDuration): Future[int] {.async.} =
# base returns always 0
discard await procCall PubSub(g).publish(topic, data)
discard await procCall PubSub(g).publish(topic, data, timeout)
trace "publishing message on topic", topic, data = data.shortLog
var peers: HashSet[PubSubPeer]
@ -512,7 +517,7 @@ method publish*(g: GossipSub,
if msgId notin g.mcache:
g.mcache.put(msgId, msg)
let published = await g.publishHelper(peers, @[msg])
let published = await g.publishHelper(peers, @[msg], timeout)
if published > 0:
libp2p_pubsub_messages_published.inc(labelValues = [topic])

41
libp2p/protocols/pubsub/pubsub.nim
View File

@ -30,8 +30,6 @@ declareCounter(libp2p_pubsub_validation_failure, "pubsub failed validated messag
declarePublicCounter(libp2p_pubsub_messages_published, "published messages", labels = ["topic"])
type
SendRes = tuple[published: seq[string], failed: seq[string]] # keep private
TopicHandler* = proc(topic: string,
data: seq[byte]): Future[void] {.gcsafe.}
@ -66,6 +64,7 @@ method handleDisconnect*(p: PubSub, peer: PubSubPeer) {.base.} =
##
if not(isNil(peer)) and peer.peerInfo notin p.conns:
trace "deleting peer", peer = peer.id
peer.onConnect.fire() # Make sure all pending sends are unblocked
p.peers.del(peer.id)
trace "peer disconnected", peer = peer.id
@ -95,24 +94,7 @@ proc sendSubs*(p: PubSub,
topics: seq[string],
subscribe: bool) {.async.} =
## send subscriptions to remote peer
try:
# wait for a connection before publishing
# this happens when
if not peer.onConnect.isSet:
trace "awaiting send connection"
await peer.onConnect.wait()
await peer.sendSubOpts(topics, subscribe)
except CancelledError as exc:
if not(isNil(peer)) and not(isNil(peer.conn)):
await peer.conn.close()
raise exc
except CatchableError as exc:
trace "unable to send subscriptions", exc = exc.msg
if not(isNil(peer)) and not(isNil(peer.conn)):
await peer.conn.close()
asyncCheck peer.sendSubOpts(topics, subscribe)
method subscribeTopic*(p: PubSub,
topic: string,
@ -147,7 +129,6 @@ proc getOrCreatePeer(p: PubSub,
p.peers[peer.id] = peer
peer.observers = p.observers
# metrics
libp2p_pubsub_peers.set(p.peers.len.int64)
return peer
@ -281,9 +262,11 @@ method subscribe*(p: PubSub,
# metrics
libp2p_pubsub_topics.set(p.topics.len.int64)
proc sendHelper*(p: PubSub,
proc publishHelper*(p: PubSub,
sendPeers: HashSet[PubSubPeer],
msgs: seq[Message]): Future[SendRes] {.async.} =
msgs: seq[Message],
timeout: Duration): Future[int] {.async.} =
# send messages and cleanup failed peers
var sent: seq[tuple[id: string, fut: Future[void]]]
for sendPeer in sendPeers:
# avoid sending to self
@ -291,7 +274,7 @@ proc sendHelper*(p: PubSub,
continue
trace "sending messages to peer", peer = sendPeer.id, msgs
sent.add((id: sendPeer.id, fut: sendPeer.send(RPCMsg(messages: msgs))))
sent.add((id: sendPeer.id, fut: sendPeer.send(RPCMsg(messages: msgs), timeout)))
var published: seq[string]
var failed: seq[string]
@ -306,13 +289,6 @@ proc sendHelper*(p: PubSub,
trace "sending messages to peer succeeded", peer = f[0].id
published.add(f[0].id)
return (published, failed)
proc publishHelper*(p: PubSub,
sendPeers: HashSet[PubSubPeer],
msgs: seq[Message]): Future[int] {.async.} =
# send messages and cleanup failed peers
let (published, failed) = await p.sendHelper(sendPeers, msgs)
for f in failed:
let peer = p.peers.getOrDefault(f)
if not(isNil(peer)) and not(isNil(peer.conn)):
@ -322,7 +298,8 @@ proc publishHelper*(p: PubSub,
method publish*(p: PubSub,
topic: string,
data: seq[byte]): Future[int] {.base, async.} =
data: seq[byte],
timeout: Duration = InfiniteDuration): Future[int] {.base, async.} =
## publish to a ``topic``
if p.triggerSelf and topic in p.topics:
for h in p.topics[topic].handler:

68
libp2p/protocols/pubsub/pubsubpeer.nim
View File

@ -26,6 +26,10 @@ declareCounter(libp2p_pubsub_received_messages, "number of messages received", l
declareCounter(libp2p_pubsub_skipped_received_messages, "number of received skipped messages", labels = ["id"])
declareCounter(libp2p_pubsub_skipped_sent_messages, "number of sent skipped messages", labels = ["id"])
const
DefaultReadTimeout* = 1.minutes
DefaultSendTimeout* = 10.seconds
type
PubSubObserver* = ref object
onRecv*: proc(peer: PubSubPeer; msgs: var RPCMsg) {.gcsafe, raises: [Defect].}
@ -81,9 +85,9 @@ proc handle*(p: PubSubPeer, conn: Connection) {.async.} =
debug "starting pubsub read loop for peer", closed = conn.closed
try:
try:
while not conn.closed:
while not conn.atEof:
trace "waiting for data", closed = conn.closed
let data = await conn.readLp(64 * 1024)
let data = await conn.readLp(64 * 1024).wait(DefaultReadTimeout)
let digest = $(sha256.digest(data))
trace "read data from peer", data = data.shortLog
if digest in p.recvdRpcCache:
@ -119,7 +123,10 @@ proc handle*(p: PubSubPeer, conn: Connection) {.async.} =
trace "Exception occurred in PubSubPeer.handle", exc = exc.msg
raise exc
proc send*(p: PubSubPeer, msg: RPCMsg) {.async.} =
proc send*(
p: PubSubPeer,
msg: RPCMsg,
timeout: Duration = DefaultSendTimeout) {.async.} =
logScope:
peer = p.id
msg = shortLog(msg)
@ -132,7 +139,7 @@ proc send*(p: PubSubPeer, msg: RPCMsg) {.async.} =
let encoded = encodeRpcMsg(mm)
if encoded.len <= 0:
trace "empty message, skipping"
info "empty message, skipping"
return
logScope:
@ -144,21 +151,36 @@ proc send*(p: PubSubPeer, msg: RPCMsg) {.async.} =
libp2p_pubsub_skipped_sent_messages.inc(labelValues = [p.id])
return
try:
proc sendToRemote() {.async.} =
logScope:
peer = p.id
msg = shortLog(msg)
trace "about to send message"
if not p.onConnect.isSet:
await p.onConnect.wait()
if p.connected: # this can happen if the remote disconnected
trace "sending encoded msgs to peer"
await p.sendConn.writeLp(encoded)
p.sentRpcCache.put(digest)
trace "sent pubsub message to remote"
for x in mm.messages:
for t in x.topicIDs:
# metrics
libp2p_pubsub_sent_messages.inc(labelValues = [p.id, t])
let sendFut = sendToRemote()
try:
await sendFut.wait(timeout)
except CatchableError as exc:
trace "unable to send to remote", exc = exc.msg
if not sendFut.finished:
sendFut.cancel()
if not(isNil(p.sendConn)):
await p.sendConn.close()
p.sendConn = nil
@ -166,21 +188,41 @@ proc send*(p: PubSubPeer, msg: RPCMsg) {.async.} =
raise exc
proc sendSubOpts*(p: PubSubPeer, topics: seq[string], subscribe: bool): Future[void] =
proc sendSubOpts*(p: PubSubPeer, topics: seq[string], subscribe: bool) {.async.} =
trace "sending subscriptions", peer = p.id, subscribe, topicIDs = topics
p.send(RPCMsg(
subscriptions: topics.mapIt(SubOpts(subscribe: subscribe, topic: it))))
try:
await p.send(RPCMsg(
subscriptions: topics.mapIt(SubOpts(subscribe: subscribe, topic: it))),
# the long timeout is mostly for cases where
# the connection is flaky at the beggingin
timeout = 3.minutes)
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "exception sending subscriptions", exc = exc.msg
proc sendGraft*(p: PubSubPeer, topics: seq[string]): Future[void] =
proc sendGraft*(p: PubSubPeer, topics: seq[string]) {.async.} =
trace "sending graft to peer", peer = p.id, topicIDs = topics
p.send(RPCMsg(control: some(
ControlMessage(graft: topics.mapIt(ControlGraft(topicID: it))))))
proc sendPrune*(p: PubSubPeer, topics: seq[string]): Future[void] =
try:
await p.send(RPCMsg(control: some(
ControlMessage(graft: topics.mapIt(ControlGraft(topicID: it))))))
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "exception sending grafts", exc = exc.msg
proc sendPrune*(p: PubSubPeer, topics: seq[string]) {.async.} =
trace "sending prune to peer", peer = p.id, topicIDs = topics
p.send(RPCMsg(control: some(
try:
await p.send(RPCMsg(control: some(
ControlMessage(prune: topics.mapIt(ControlPrune(topicID: it))))))
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "exception sending prunes", exc = exc.msg
proc `$`*(p: PubSubPeer): string =
p.id

40
libp2p/switch.nim
View File

@ -97,14 +97,16 @@ proc triggerHooks(s: Switch, peer: PeerInfo, cycle: Lifecycle) {.async, gcsafe.}
proc disconnect*(s: Switch, peer: PeerInfo) {.async, gcsafe.}
proc subscribePeer*(s: Switch, peerInfo: PeerInfo) {.async, gcsafe.}
proc subscribePeerInternal(s: Switch, peerInfo: PeerInfo) {.async, gcsafe.}
proc cleanupPubSubPeer(s: Switch, conn: Connection) {.async.} =
try:
await conn.closeEvent.wait()
trace "about to cleanup pubsub peer"
if s.pubSub.isSome:
let fut = s.pubsubMonitors.getOrDefault(conn.peerInfo.peerId)
if not(isNil(fut)) and not(fut.finished):
await fut.cancelAndWait()
fut.cancel()
await s.pubSub.get().unsubscribePeer(conn.peerInfo)
except CancelledError as exc:
@ -235,7 +237,7 @@ proc upgradeOutgoing(s: Switch, conn: Connection): Future[Connection] {.async, g
return sconn
proc upgradeIncoming(s: Switch, conn: Connection) {.async, gcsafe.} =
trace "upgrading incoming connection", conn = $conn, oid = conn.oid
trace "upgrading incoming connection", conn = $conn, oid = $conn.oid
let ms = newMultistream()
# secure incoming connections
@ -244,7 +246,7 @@ proc upgradeIncoming(s: Switch, conn: Connection) {.async, gcsafe.} =
{.async, gcsafe, closure.} =
var sconn: Connection
trace "Securing connection", oid = conn.oid
trace "Securing connection", oid = $conn.oid
let secure = s.secureManagers.filterIt(it.codec == proto)[0]
try:
@ -356,8 +358,8 @@ proc internalConnect(s: Switch,
trace "dial successful", oid = $conn.oid,
peer = $conn.peerInfo
await s.subscribePeer(peer)
asyncCheck s.cleanupPubSubPeer(conn)
asyncCheck s.subscribePeer(conn.peerInfo)
trace "got connection", oid = $conn.oid,
direction = $conn.dir,
@ -445,7 +447,7 @@ proc start*(s: Switch): Future[seq[Future[void]]] {.async, gcsafe.} =
if s.pubSub.isSome:
await s.pubSub.get().start()
info "started libp2p node", peer = $s.peerInfo, addrs = s.peerInfo.addrs
debug "started libp2p node", peer = $s.peerInfo, addrs = s.peerInfo.addrs
result = startFuts # listen for incoming connections
proc stop*(s: Switch) {.async.} =
@ -472,7 +474,9 @@ proc stop*(s: Switch) {.async.} =
proc subscribePeerInternal(s: Switch, peerInfo: PeerInfo) {.async, gcsafe.} =
## Subscribe to pub sub peer
if s.pubSub.isSome and not(s.pubSub.get().connected(peerInfo)):
##
if s.pubSub.isSome and not s.pubSub.get().connected(peerInfo):
trace "about to subscribe to pubsub peer", peer = peerInfo.shortLog()
var stream: Connection
try:
@ -483,6 +487,7 @@ proc subscribePeerInternal(s: Switch, peerInfo: PeerInfo) {.async, gcsafe.} =
if not await s.ms.select(stream, s.pubSub.get().codec):
if not(isNil(stream)):
trace "couldn't select pubsub", codec = s.pubSub.get().codec
await stream.close()
return
@ -504,11 +509,7 @@ proc pubsubMonitor(s: Switch, peer: PeerInfo) {.async.} =
## pubsub connection as well
##
var tries = 0
var backoffFactor = 5 # up to ~10 mins
var backoff = 1.seconds
while s.isConnected(peer) and
tries < MaxPubsubReconnectAttempts:
while s.isConnected(peer):
try:
debug "subscribing to pubsub peer", peer = $peer
await s.subscribePeerInternal(peer)
@ -517,10 +518,8 @@ proc pubsubMonitor(s: Switch, peer: PeerInfo) {.async.} =
except CatchableError as exc:
trace "exception in pubsub monitor", peer = $peer, exc = exc.msg
finally:
debug "awaiting backoff period before reconnecting", peer = $peer, backoff, tries
await sleepAsync(backoff) # allow the peer to cooldown
backoff = backoff * backoffFactor
tries.inc()
debug "sleeping before trying pubsub peer", peer = $peer
await sleepAsync(1.seconds) # allow the peer to cooldown
trace "exiting pubsub monitor", peer = $peer
@ -528,6 +527,8 @@ proc subscribePeer*(s: Switch, peerInfo: PeerInfo) {.async, gcsafe.} =
if peerInfo.peerId notin s.pubsubMonitors:
s.pubsubMonitors[peerInfo.peerId] = s.pubsubMonitor(peerInfo)
result = s.pubsubMonitors.getOrDefault(peerInfo.peerId)
proc subscribe*(s: Switch, topic: string,
handler: TopicHandler) {.async.} =
## subscribe to a pubsub topic
@ -554,14 +555,17 @@ proc unsubscribeAll*(s: Switch, topic: string) {.async.} =
await s.pubSub.get().unsubscribeAll(topic)
proc publish*(s: Switch, topic: string, data: seq[byte]): Future[int] {.async.} =
proc publish*(s: Switch,
topic: string,
data: seq[byte],
timeout: Duration = InfiniteDuration): Future[int] {.async.} =
## pubslish to pubsub topic
##
if s.pubSub.isNone:
raise newNoPubSubException()
return await s.pubSub.get().publish(topic, data)
return await s.pubSub.get().publish(topic, data, timeout)
proc addValidator*(s: Switch,
topics: varargs[string],
@ -611,8 +615,8 @@ proc muxerHandler(s: Switch, muxer: Muxer) {.async, gcsafe.} =
asyncCheck s.triggerHooks(muxer.connection.peerInfo, Lifecycle.Upgraded)
# try establishing a pubsub connection
await s.subscribePeer(muxer.connection.peerInfo)
asyncCheck s.cleanupPubSubPeer(muxer.connection)
asyncCheck s.subscribePeer(muxer.connection.peerInfo)
except CancelledError as exc:
await muxer.close()

41
tests/pubsub/testfloodsub.nim
View File

@ -15,7 +15,9 @@ import utils,
../../libp2p/[errors,
switch,
stream/connection,
stream/bufferstream,
crypto/crypto,
protocols/pubsub/pubsubpeer,
protocols/pubsub/pubsub,
protocols/pubsub/floodsub,
protocols/pubsub/rpc/messages,
@ -218,6 +220,45 @@ suite "FloodSub":
check:
waitFor(runTests()) == true
test "FloodSub publish should fail on timeout":
proc runTests(): Future[bool] {.async.} =
proc handler(topic: string, data: seq[byte]) {.async, gcsafe.} =
discard
var nodes = generateNodes(2)
var awaiters: seq[Future[void]]
awaiters.add((await nodes[0].start()))
awaiters.add((await nodes[1].start()))
let subscribes = await subscribeNodes(nodes)
await nodes[1].subscribe("foobar", handler)
await waitSub(nodes[0], nodes[1], "foobar")
let pubsub = nodes[0].pubSub.get()
let peer = pubsub.peers[nodes[1].peerInfo.id]
peer.conn = Connection(newBufferStream(
proc (data: seq[byte]) {.async, gcsafe.} =
await sleepAsync(10.seconds)
,size = 0))
let in10millis = Moment.fromNow(10.millis)
let sent = await nodes[0].publish("foobar", "Hello!".toBytes(), 10.millis)
check Moment.now() >= in10millis
check sent == 0
await allFuturesThrowing(
nodes[0].stop(),
nodes[1].stop())
await allFuturesThrowing(subscribes)
await allFuturesThrowing(awaiters)
result = true
check:
waitFor(runTests()) == true
test "FloodSub multiple peers, no self trigger":
proc runTests(): Future[bool] {.async.} =
var runs = 10

41
tests/pubsub/testgossipsub.nim
View File

@ -16,8 +16,10 @@ import utils, ../../libp2p/[errors,
peerid,
peerinfo,
stream/connection,
stream/bufferstream,
crypto/crypto,
protocols/pubsub/pubsub,
protocols/pubsub/pubsubpeer,
protocols/pubsub/gossipsub,
protocols/pubsub/peertable,
protocols/pubsub/rpc/messages]
@ -200,6 +202,45 @@ suite "GossipSub":
check:
waitFor(runTests()) == true
test "GossipSub publish should fail on timeout":
proc runTests(): Future[bool] {.async.} =
proc handler(topic: string, data: seq[byte]) {.async, gcsafe.} =
discard
var nodes = generateNodes(2, gossip = true)
var awaiters: seq[Future[void]]
awaiters.add((await nodes[0].start()))
awaiters.add((await nodes[1].start()))
let subscribes = await subscribeNodes(nodes)
await nodes[1].subscribe("foobar", handler)
await waitSub(nodes[0], nodes[1], "foobar")
let pubsub = nodes[0].pubSub.get()
let peer = pubsub.peers[nodes[1].peerInfo.id]
peer.conn = Connection(newBufferStream(
proc (data: seq[byte]) {.async, gcsafe.} =
await sleepAsync(10.seconds)
, size = 0))
let in10millis = Moment.fromNow(10.millis)
let sent = await nodes[0].publish("foobar", "Hello!".toBytes(), 10.millis)
check Moment.now() >= in10millis
check sent == 0
await allFuturesThrowing(
nodes[0].stop(),
nodes[1].stop())
await allFuturesThrowing(subscribes)
await allFuturesThrowing(awaiters)
result = true
check:
waitFor(runTests()) == true
test "e2e - GossipSub should add remote peer topic subscriptions":
proc testBasicGossipSub(): Future[bool] {.async.} =
proc handler(topic: string, data: seq[byte]) {.async, gcsafe.} =

4
tests/testmultistream.nim
View File

@ -54,6 +54,7 @@ method write*(s: TestSelectStream, msg: seq[byte]) {.async, gcsafe.} = discard
method close(s: TestSelectStream) {.async, gcsafe.} =
s.isClosed = true
s.isEof = true
proc newTestSelectStream(): TestSelectStream =
new result
@ -104,6 +105,7 @@ method write*(s: TestLsStream, msg: seq[byte]) {.async, gcsafe.} =
method close(s: TestLsStream) {.async, gcsafe.} =
s.isClosed = true
s.isEof = true
proc newTestLsStream(ls: LsHandler): TestLsStream {.gcsafe.} =
new result
@ -157,6 +159,7 @@ method write*(s: TestNaStream, msg: seq[byte]) {.async, gcsafe.} =
method close(s: TestNaStream) {.async, gcsafe.} =
s.isClosed = true
s.isEof = true
proc newTestNaStream(na: NaHandler): TestNaStream =
new result
@ -234,6 +237,7 @@ suite "Multistream select":
let conn = newTestNaStream(testNaHandler)
proc testNaHandler(msg: string): Future[void] {.async, gcsafe.} =
echo msg
check msg == Na
await conn.close()