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js_test.go
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js_test.go
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// Copyright 2020 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package test
import (
"context"
"fmt"
"os"
"strings"
"testing"
"time"
"github.com/nats-io/nats-server/v2/server"
"github.com/nats-io/nats.go"
)
func TestJetStreamNotEnabled(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
if _, err := nc.JetStream(); err != nats.ErrJetStreamNotEnabled {
t.Fatalf("Did not get the proper error, got %v", err)
}
}
func TestJetStreamNotAccountEnabled(t *testing.T) {
conf := createConfFile(t, []byte(`
listen: 127.0.0.1:-1
no_auth_user: rip
jetstream: {max_mem_store: 64GB, max_file_store: 10TB}
accounts: {
JS: {
jetstream: enabled
users: [ {user: dlc, password: foo} ]
},
IU: {
users: [ {user: rip, password: bar} ]
},
}
`))
defer os.Remove(conf)
s, _ := RunServerWithConfig(conf)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
if _, err := nc.JetStream(); err != nats.ErrJetStreamNotEnabled {
t.Fatalf("Did not get the proper error, got %v", err)
}
}
func TestJetStreamPublish(t *testing.T) {
s := RunBasicJetStreamServer()
defer s.Shutdown()
if config := s.JetStreamConfig(); config != nil {
defer os.RemoveAll(config.StoreDir)
}
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
js, err := nc.JetStream()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Make sure we get a proper failure when no stream is present.
_, err = js.Publish("foo", []byte("Hello JS"))
if err != nats.ErrNoStreamResponse {
t.Fatalf("Expected a no stream error but got %v", err)
}
// Create the stream using our client API.
si, err := js.AddStream(&nats.StreamConfig{
Name: "TEST",
Subjects: []string{"test", "foo", "bar"},
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Double check that file-based storage is default.
if si.Config.Storage != nats.FileStorage {
t.Fatalf("Expected FileStorage as default, got %v", si.Config.Storage)
}
// Lookup the stream for testing.
mset, err := s.GlobalAccount().LookupStream("TEST")
if err != nil {
t.Fatalf("stream lookup failed: %v", err)
}
var pa *nats.PubAck
expect := func(seq, nmsgs uint64) {
t.Helper()
if seq > 0 && pa == nil {
t.Fatalf("Missing pubAck to test sequence %d", seq)
}
if pa != nil {
if pa.Stream != "TEST" {
t.Fatalf("Wrong stream name, expected %q, got %q", "TEST", pa.Stream)
}
if seq > 0 && pa.Sequence != seq {
t.Fatalf("Wrong stream sequence, expected %d, got %d", seq, pa.Sequence)
}
}
if state := mset.State(); state.Msgs != nmsgs {
t.Fatalf("Expected %d messages, got %d", nmsgs, state.Msgs)
}
}
msg := []byte("Hello JS")
// Basic publish like NATS core.
pa, err = js.Publish("foo", msg)
if err != nil {
t.Fatalf("Unexpected publish error: %v", err)
}
expect(1, 1)
// Test stream expectation.
pa, err = js.Publish("foo", msg, nats.ExpectStream("ORDERS"))
if err == nil || !strings.Contains(err.Error(), "stream does not match") {
t.Fatalf("Expected an error, got %v", err)
}
// Test last sequence expectation.
pa, err = js.Publish("foo", msg, nats.ExpectLastSequence(10))
if err == nil || !strings.Contains(err.Error(), "wrong last sequence") {
t.Fatalf("Expected an error, got %v", err)
}
// Messages should have been rejected.
expect(0, 1)
// Send in a stream with a msgId
pa, err = js.Publish("foo", msg, nats.MsgId("ZZZ"))
if err != nil {
t.Fatalf("Unexpected publish error: %v", err)
}
expect(2, 2)
// Send in the same message with same msgId.
pa, err = js.Publish("foo", msg, nats.MsgId("ZZZ"))
if err != nil {
t.Fatalf("Unexpected publish error: %v", err)
}
if pa.Sequence != 2 {
t.Fatalf("Expected sequence of 2, got %d", pa.Sequence)
}
if !pa.Duplicate {
t.Fatalf("Expected duplicate to be set")
}
expect(2, 2)
// Now try to send one in with the wrong last msgId.
pa, err = js.Publish("foo", msg, nats.ExpectLastMsgId("AAA"))
if err == nil || !strings.Contains(err.Error(), "wrong last msg") {
t.Fatalf("Expected an error, got %v", err)
}
// Make sure expected sequence works.
pa, err = js.Publish("foo", msg, nats.ExpectLastSequence(22))
if err == nil || !strings.Contains(err.Error(), "wrong last sequence") {
t.Fatalf("Expected an error, got %v", err)
}
expect(0, 2)
// This should work ok.
pa, err = js.Publish("foo", msg, nats.ExpectLastSequence(2))
if err != nil {
t.Fatalf("Unexpected publish error: %v", err)
}
expect(3, 3)
// Now test context and timeouts.
// Both set should fail.
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
_, err = js.Publish("foo", msg, nats.MaxWait(time.Second), nats.Context(ctx))
if err != nats.ErrContextAndTimeout {
t.Fatalf("Expected %q, got %q", nats.ErrContextAndTimeout, err)
}
// Create dummy listener for timeout and context tests.
sub, _ := nc.SubscribeSync("baz")
defer sub.Unsubscribe()
_, err = js.Publish("baz", msg, nats.MaxWait(time.Nanosecond))
if err != nats.ErrTimeout {
t.Fatalf("Expected %q, got %q", nats.ErrTimeout, err)
}
go cancel()
_, err = js.Publish("baz", msg, nats.Context(ctx))
if err != context.Canceled {
t.Fatalf("Expected %q, got %q", context.Canceled, err)
}
}
func TestJetStreamSubscribe(t *testing.T) {
s := RunBasicJetStreamServer()
defer s.Shutdown()
if config := s.JetStreamConfig(); config != nil {
defer os.RemoveAll(config.StoreDir)
}
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
js, err := nc.JetStream()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Create the stream using our client API.
_, err = js.AddStream(&nats.StreamConfig{
Name: "TEST",
Subjects: []string{"foo", "bar", "baz", "foo.*"},
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Lookup the stream for testing.
mset, err := s.GlobalAccount().LookupStream("TEST")
if err != nil {
t.Fatalf("stream lookup failed: %v", err)
}
msg := []byte("Hello JS")
// Basic publish like NATS core.
js.Publish("foo", msg)
q := make(chan *nats.Msg, 4)
// Now create a simple ephemeral consumer.
sub, err := js.Subscribe("foo", func(m *nats.Msg) {
q <- m
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
select {
case m := <-q:
if _, err := m.MetaData(); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
case <-time.After(5 * time.Second):
t.Fatalf("Did not receive the messages in time")
}
// Now do same but sync.
sub, err = js.SubscribeSync("foo")
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
waitForPending := func(n int) {
timeout := time.Now().Add(2 * time.Second)
for time.Now().Before(timeout) {
if msgs, _, _ := sub.Pending(); msgs == n {
return
}
time.Sleep(10 * time.Millisecond)
}
msgs, _, _ := sub.Pending()
t.Fatalf("Expected to receive %d messages, but got %d", n, msgs)
}
waitForPending(1)
// Make sure we are set to explicit ack for callback based subscriptions and that the messages go down etc.
mset.Purge()
toSend := 10
for i := 0; i < toSend; i++ {
js.Publish("bar", msg)
}
if state := mset.State(); state.Msgs != 10 {
t.Fatalf("Expected %d messages, got %d", toSend, state.Msgs)
}
done := make(chan bool, 1)
var received int
sub, err = js.Subscribe("bar", func(m *nats.Msg) {
received++
if received == toSend {
done <- true
}
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
select {
case <-done:
case <-time.After(5 * time.Second):
t.Fatalf("Did not receive all of the messages in time")
}
// If we are here we have received all of the messages.
// We hang the ConsumerInfo option off of the subscription, so we use that to check status.
info, _ := sub.ConsumerInfo()
if info.Config.AckPolicy != nats.AckExplicit {
t.Fatalf("Expected ack explicit policy, got %q", info.Config.AckPolicy)
}
if info.Delivered.Consumer != uint64(toSend) {
t.Fatalf("Expected to have received all %d messages, got %d", toSend, info.Delivered.Consumer)
}
// Make sure we auto-ack'd
if info.AckFloor.Consumer != uint64(toSend) {
t.Fatalf("Expected to have ack'd all %d messages, got ack floor of %d", toSend, info.AckFloor.Consumer)
}
sub.Unsubscribe()
// Now create a sync subscriber that is durable.
dname := "derek"
sub, err = js.SubscribeSync("foo", nats.Durable(dname))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
// Make sure we registered as a durable.
if info, _ := sub.ConsumerInfo(); info.Config.Durable != dname {
t.Fatalf("Expected durable name to be set to %q, got %q", dname, info.Config.Durable)
}
deliver := sub.Subject
sub.Unsubscribe()
// Create again and make sure that works and that we attach to the same durable with different delivery.
sub, err = js.SubscribeSync("foo", nats.Durable(dname))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
if deliver == sub.Subject {
t.Fatalf("Expected delivery subject to be different then %q", deliver)
}
deliver = sub.Subject
// Now test that we can attach to an existing durable.
sub, err = js.SubscribeSync("foo", nats.Attach(mset.Name(), dname))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
if deliver != sub.Subject {
t.Fatalf("Expected delivery subject to be the same when attaching, got different")
}
// Now try pull based subscribers.
// Check some error conditions first.
if _, err := js.Subscribe("bar", func(m *nats.Msg) {}, nats.Pull(1)); err != nats.ErrPullModeNotAllowed {
t.Fatalf("Expected an error trying to do PullMode on callback based subscriber, got %v", err)
}
batch := 5
sub, err = js.SubscribeSync("bar", nats.Durable("rip"), nats.Pull(batch))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
// The first batch if available should be delivered and queued up.
waitForPending(batch)
if info, _ := sub.ConsumerInfo(); info.NumAckPending != batch || info.NumPending != uint64(batch) {
t.Fatalf("Expected %d pending ack, and %d still waiting to be delivered, got %d and %d", batch, batch, info.NumAckPending, info.NumPending)
}
// Now go ahead and consume these and ack, but not ack+next.
for i := 0; i < batch; i++ {
m, err := sub.NextMsg(10 * time.Millisecond)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
m.Respond(nats.AckAck)
}
if info, _ := sub.ConsumerInfo(); info.AckFloor.Consumer != uint64(batch) {
t.Fatalf("Expected ack floor to be %d, got %d", batch, info.AckFloor.Consumer)
}
// Now we are stuck so to speak. So we can unstick the sub by calling poll.
waitForPending(0)
sub.Poll()
waitForPending(batch)
sub.Unsubscribe()
// Now test attaching to a pull based durable.
// Test that if we are attaching that the subjects will match up. rip from
// above was created with a filtered subject of bar, so this should fail.
_, err = js.SubscribeSync("baz", nats.Attach(mset.Name(), "rip"), nats.Pull(batch))
if err != nats.ErrSubjectMismatch {
t.Fatalf("Expected a %q error but got %q", nats.ErrSubjectMismatch, err)
}
// Queue up 10 more messages.
for i := 0; i < toSend; i++ {
js.Publish("bar", msg)
}
sub, err = js.SubscribeSync("bar", nats.Attach(mset.Name(), "rip"), nats.Pull(batch))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
waitForPending(batch)
if info, _ := sub.ConsumerInfo(); info.NumAckPending != batch*2 || info.NumPending != uint64(toSend-batch) {
t.Fatalf("Expected ack pending of %d and pending to be %d, got %d %d", batch*2, toSend-batch, info.NumAckPending, info.NumPending)
}
// Create a new pull based consumer.
batch = 1
msgs := make(chan *nats.Msg, 100)
sub, err = js.ChanSubscribe("baz", msgs, nats.Durable("dlc"), nats.Pull(batch))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Since this sub is on 'baz' no messages are waiting for us to start.
waitForPending(0)
// Now send in 10 messages to baz.
for i := 0; i < toSend; i++ {
js.Publish("baz", msg)
}
// We should get 1 queued up.
waitForPending(batch)
for received := 0; received < toSend; {
select {
case m := <-msgs:
received++
// This will do the AckNext version since it knows we are pull based.
m.Ack()
case <-time.After(time.Second):
t.Fatalf("Timeout waiting for messages")
}
}
}
func TestAckForNonJetStream(t *testing.T) {
s := RunBasicJetStreamServer()
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
sub, _ := nc.SubscribeSync("foo")
nc.PublishRequest("foo", "_INBOX_", []byte("OK"))
m, err := sub.NextMsg(time.Second)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if err := m.Ack(); err != nats.ErrNotJSMessage {
t.Fatalf("Expected an error of '%v', got '%v'", nats.ErrNotJSMessage, err)
}
}
// TODO(dlc) - fill out with more stuff.
func TestJetStreamManagement(t *testing.T) {
s := RunBasicJetStreamServer()
defer s.Shutdown()
if config := s.JetStreamConfig(); config != nil {
defer os.RemoveAll(config.StoreDir)
}
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
js, err := nc.JetStream()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Create the stream using our client API.
si, err := js.AddStream(&nats.StreamConfig{Name: "foo"})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if si == nil || si.Config.Name != "foo" {
t.Fatalf("StreamInfo is not correct %+v", si)
}
// Check info calls.
si, err = js.StreamInfo("foo")
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if si == nil || si.Config.Name != "foo" {
t.Fatalf("StreamInfo is not correct %+v", si)
}
// Create a consumer using our client API.
ci, err := js.AddConsumer("foo", &nats.ConsumerConfig{Durable: "dlc", AckPolicy: nats.AckExplicit})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if ci == nil || ci.Name != "dlc" || ci.Stream != "foo" {
t.Fatalf("ConsumerInfo is not correct %+v", ci)
}
}
func TestJetStreamImport(t *testing.T) {
conf := createConfFile(t, []byte(`
listen: 127.0.0.1:-1
no_auth_user: rip
jetstream: {max_mem_store: 64GB, max_file_store: 10TB}
accounts: {
JS: {
jetstream: enabled
users: [ {user: dlc, password: foo} ]
exports [ { service: "$JS.API.>" }, { service: "foo" }]
},
U: {
users: [ {user: rip, password: bar} ]
imports [
{ service: { subject: "$JS.API.>", account: JS } , to: "dlc.>" }
{ service: { subject: "foo", account: JS } }
]
},
}
`))
defer os.Remove(conf)
s, _ := RunServerWithConfig(conf)
defer s.Shutdown()
if config := s.JetStreamConfig(); config != nil {
defer os.RemoveAll(config.StoreDir)
}
// Create a stream using the server directly.
acc, _ := s.LookupAccount("JS")
mset, err := acc.AddStream(&server.StreamConfig{
Name: "TEST",
Subjects: []string{"foo", "bar"},
})
if err != nil {
t.Fatalf("stream create failed: %v", err)
}
defer mset.Delete()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
// Since we import with a prefix from above we can use that when creating our JS context.
js, err := nc.JetStream(nats.ApiPrefix("dlc"))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
msg := []byte("Hello JS Import!")
if _, err = js.Publish("foo", msg); err != nil {
t.Fatalf("Unexpected publish error: %v", err)
}
if state := mset.State(); state.Msgs != 1 {
t.Fatalf("Expected %d messages, got %d", 1, state.Msgs)
}
}
func TestJetStreamImportDirectOnly(t *testing.T) {
conf := createConfFile(t, []byte(`
listen: 127.0.0.1:-1
no_auth_user: rip
jetstream: {max_mem_store: 64GB, max_file_store: 10TB}
accounts: {
JS: {
jetstream: enabled
users: [ {user: dlc, password: foo} ]
exports [
# For the stream publish.
{ service: "ORDERS" }
# For the pull based consumer. Response type needed for batchsize > 1
{ service: "$JS.API.CONSUMER.MSG.NEXT.ORDERS.d1", response: stream }
# For the push based consumer delivery and ack.
{ stream: "p.d" }
# For the acks. Service in case we want an ack to our ack.
{ service: "$JS.ACK.ORDERS.*.>" }
]
},
U: {
users: [ {user: rip, password: bar} ]
imports [
{ service: { subject: "ORDERS", account: JS } , to: "orders" }
{ service: { subject: "$JS.API.CONSUMER.MSG.NEXT.ORDERS.d1", account: JS } }
{ stream: { subject: "p.d", account: JS } }
{ service: { subject: "$JS.ACK.ORDERS.*.>", account: JS } }
]
},
}
`))
defer os.Remove(conf)
s, _ := RunServerWithConfig(conf)
defer s.Shutdown()
if config := s.JetStreamConfig(); config != nil {
defer os.RemoveAll(config.StoreDir)
}
// Create a stream using the server directly.
acc, _ := s.LookupAccount("JS")
mset, err := acc.AddStream(&server.StreamConfig{Name: "ORDERS"})
if err != nil {
t.Fatalf("stream create failed: %v", err)
}
defer mset.Delete()
// Create a pull based consumer.
o1, err := mset.AddConsumer(&server.ConsumerConfig{Durable: "d1", AckPolicy: server.AckExplicit})
if err != nil {
t.Fatalf("pull consumer create failed: %v", err)
}
defer o1.Delete()
// Create a push based consumer.
o2, err := mset.AddConsumer(&server.ConsumerConfig{Durable: "d2", AckPolicy: server.AckExplicit, DeliverSubject: "p.d"})
if err != nil {
t.Fatalf("push consumer create failed: %v", err)
}
defer o2.Delete()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
js, err := nc.JetStream(nats.DirectOnly())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Now make sure we can send to the stream.
toSend := 100
for i := 0; i < toSend; i++ {
if _, err := js.Publish("orders", []byte(fmt.Sprintf("ORDER-%d", i+1))); err != nil {
t.Fatalf("Unexpected error publishing message %d: %v", i+1, err)
}
}
if state := mset.State(); state.Msgs != uint64(toSend) {
t.Fatalf("Expected %d messages, got %d", toSend, state.Msgs)
}
// Check for correct errors.
if _, err := js.SubscribeSync("ORDERS"); err != nats.ErrDirectModeRequired {
t.Fatalf("Expected an error of '%v', got '%v'", nats.ErrDirectModeRequired, err)
}
var sub *nats.Subscription
waitForPending := func(n int) {
timeout := time.Now().Add(2 * time.Second)
for time.Now().Before(timeout) {
if msgs, _, _ := sub.Pending(); msgs == n {
return
}
time.Sleep(10 * time.Millisecond)
}
msgs, _, _ := sub.Pending()
t.Fatalf("Expected to receive %d messages, but got %d", n, msgs)
}
// Do push based direct consumer.
sub, err = js.SubscribeSync("ORDERS", nats.PushDirect("p.d"))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
waitForPending(toSend)
// Ack the messages from the push consumer.
for i := 0; i < toSend; i++ {
m, err := sub.NextMsg(100 * time.Millisecond)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Test that can expect an ack of the ack.
err = m.AckSync()
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
}
// Now pull based consumer.
batch := 10
sub, err = js.SubscribeSync("ORDERS", nats.PullDirect("ORDERS", "d1", batch))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
waitForPending(batch)
for i := 0; i < toSend; i++ {
m, err := sub.NextMsg(100 * time.Millisecond)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Tests that acks flow since we need these to do AckNext for this to work.
err = m.Ack()
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
}
}
func TestJetStreamAutoMaxAckPending(t *testing.T) {
s := RunBasicJetStreamServer()
defer s.Shutdown()
if config := s.JetStreamConfig(); config != nil {
defer os.RemoveAll(config.StoreDir)
}
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
js, err := nc.JetStream()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
mset, err := s.GlobalAccount().AddStream(&server.StreamConfig{Name: "foo"})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
toSend := 10_000
msg := []byte("Hello")
for i := 0; i < toSend; i++ {
// Use plain NATS here for speed.
nc.Publish("foo", msg)
}
nc.Flush()
if state := mset.State(); state.Msgs != uint64(toSend) {
t.Fatalf("Expected %d messages, got %d", toSend, state.Msgs)
}
// Create a consumer.
msgs := make(chan *nats.Msg, 500)
sub, err := js.ChanSubscribe("foo", msgs)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
expectedMaxAck, _, _ := sub.PendingLimits()
ci, err := sub.ConsumerInfo()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if ci.Config.MaxAckPending != expectedMaxAck {
t.Fatalf("Expected MaxAckPending to be set to %d, got %d", expectedMaxAck, ci.Config.MaxAckPending)
}
waitForPending := func(n int) {
timeout := time.Now().Add(2 * time.Second)
for time.Now().Before(timeout) {
if msgs, _, _ := sub.Pending(); msgs == n {
return
}
time.Sleep(10 * time.Millisecond)
}
msgs, _, _ := sub.Pending()
t.Fatalf("Expected to receive %d messages, but got %d", n, msgs)
}
waitForPending(expectedMaxAck)
// We do it twice to make sure it does not go over.
waitForPending(expectedMaxAck)
// Now make sure we can consume them all with no slow consumers etc.
for i := 0; i < toSend; i++ {
m, err := sub.NextMsg(time.Second)
if err != nil {
t.Fatalf("Unexpected error receiving %d: %v", i+1, err)
}
m.Ack()
}
}
// WIP(dlc) - This is in support of stall based tests and processing.
func TestJetStreamPullBasedStall(t *testing.T) {
t.SkipNow()
conf := createConfFile(t, []byte(`
listen: 127.0.0.1:-1
jetstream: enabled
no_auth_user: pc
accounts: {
JS: {
jetstream: enabled
users: [ {user: pc, password: foo} ]
},
}
`))
defer os.Remove(conf)
s, _ := RunServerWithConfig(conf)
defer s.Shutdown()
if config := s.JetStreamConfig(); config != nil {
defer os.RemoveAll(config.StoreDir)
}
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer nc.Close()
js, err := nc.JetStream()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Create a stream.
if _, err = js.AddStream(&nats.StreamConfig{Name: "STALL"}); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
acc, _ := s.LookupAccount("JS")
mset, err := acc.LookupStream("STALL")
if err != nil {
t.Fatalf("stream lookup failed: %v", err)
}
msg := []byte("Hello JS!")
toSend := 100_000
for i := 0; i < toSend; i++ {
// Use plain NATS here for speed.
nc.Publish("STALL", msg)
}
nc.Flush()
if state := mset.State(); state.Msgs != uint64(toSend) {
t.Fatalf("Expected %d messages, got %d", toSend, state.Msgs)
}
batch := 100
msgs := make(chan *nats.Msg, batch-2)
sub, err := js.ChanSubscribe("STALL", msgs, nats.Durable("dlc"), nats.Pull(batch))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer sub.Unsubscribe()
for received := 0; received < toSend; {
select {
case m := <-msgs:
received++
meta, _ := m.MetaData()
if meta.Consumer != uint64(received) {
t.Fatalf("Missed something, wanted %d but got %d", received, meta.Consumer)
}
m.Ack()
case <-time.After(time.Second):
t.Fatalf("Timeout waiting for messages, last received was %d", received)
}
}
}