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amqpx_test.go
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package amqpx_test
import (
"context"
"fmt"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/jxsl13/amqpx"
"github.com/jxsl13/amqpx/internal/testutils"
"github.com/jxsl13/amqpx/logging"
"github.com/jxsl13/amqpx/pool"
"github.com/jxsl13/amqpx/types"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
// WARNING: Do not assert consumer counts, as those values are too flaky and break tests all over the place
func TestMain(m *testing.M) {
testutils.VerifyLeak(m)
}
func TestExchangeDeclarePassive(t *testing.T) {
t.Parallel()
var (
amqp = amqpx.New()
ctx = context.TODO()
log = logging.NewTestLogger(t)
funcName = testutils.FuncName()
nextExchangeName = testutils.ExchangeNameGenerator(funcName)
exchangeName = nextExchangeName()
)
defer func() {
assert.NoError(t, amqp.Close())
}()
var err error
amqp.RegisterTopologyCreator(func(ctx context.Context, t *pool.Topologer) error {
return createExchange(ctx, exchangeName, t, log)
})
amqp.RegisterTopologyDeleter(func(ctx context.Context, t *pool.Topologer) error {
return deleteExchange(ctx, exchangeName, t, log)
})
err = amqp.Start(
ctx,
testutils.HealthyConnectURL,
amqpx.WithName(funcName),
amqpx.WithLogger(logging.NewTestLogger(t)),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(2),
amqpx.WithCloseTimeout(time.Minute),
)
assert.NoError(t, err)
}
func TestQueueDeclarePassive(t *testing.T) {
t.Parallel()
var (
amqp = amqpx.New()
ctx = context.TODO()
log = logging.NewTestLogger(t)
funcName = testutils.FuncName()
nextQueueName = testutils.QueueNameGenerator(funcName)
queueName = nextQueueName()
)
defer func() {
assert.NoError(t, amqp.Close())
}()
var err error
amqp.RegisterTopologyCreator(func(ctx context.Context, t *pool.Topologer) error {
return createQueue(ctx, queueName, t, log)
})
amqp.RegisterTopologyDeleter(func(ctx context.Context, t *pool.Topologer) error {
return deleteQueue(ctx, queueName, t, log)
})
err = amqp.Start(
ctx,
testutils.HealthyConnectURL,
amqpx.WithName(funcName),
amqpx.WithLogger(logging.NewTestLogger(t)),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(2),
amqpx.WithCloseTimeout(time.Minute),
)
assert.NoError(t, err)
}
func TestAMQPXPub(t *testing.T) {
t.Parallel()
var (
amqp = amqpx.New()
ctx = context.TODO()
log = logging.NewTestLogger(t)
funcName = testutils.FuncName()
nextExchangeQueue = testutils.NewExchangeQueueGenerator(funcName)
eq1 = nextExchangeQueue()
)
defer func() {
assert.NoError(t, amqp.Close())
}()
amqp.RegisterTopologyCreator(createTopology(log, eq1))
amqp.RegisterTopologyDeleter(deleteTopology(log, eq1))
err := amqp.Start(
ctx,
testutils.HealthyConnectURL,
amqpx.WithName(funcName),
amqpx.WithLogger(logging.NewNoOpLogger()),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(2),
amqpx.WithCloseTimeout(time.Minute),
)
if err != nil {
assert.NoError(t, err)
return
}
defer func() {
// will be canceled when the event has reache dthe third handler
err = amqp.Close()
assert.NoError(t, err)
}()
// publish event to first queue
err = amqp.Publish(ctx, eq1.Exchange, eq1.RoutingKey, types.Publishing{
ContentType: "text/plain",
Body: []byte(eq1.NextPubMsg()),
})
if err != nil {
assert.NoError(t, err)
return
}
var (
msg types.Delivery
ok bool
)
for i := 0; i < 20; i++ {
msg, ok, err = amqp.Get(ctx, eq1.Queue, false)
if err != nil {
assert.NoError(t, err)
return
}
if !ok {
time.Sleep(100 * time.Millisecond)
continue
}
break
}
if !ok {
assert.True(t, ok)
return
}
assert.Equal(t, eq1.NextSubMsg(), string(msg.Body))
}
func TestAMQPXSubAndPub(t *testing.T) {
t.Parallel()
var (
amqp = amqpx.New()
log = logging.NewTestLogger(t)
cctx, cancel = context.WithCancel(context.TODO())
funcName = testutils.FuncName()
nextExchangeQueue = testutils.NewExchangeQueueGenerator(funcName)
eq1 = nextExchangeQueue()
)
defer cancel()
defer func() {
log.Info("closing amqp")
assert.NoError(t, amqp.Close())
}()
amqp.RegisterTopologyCreator(createTopology(log, eq1))
amqp.RegisterTopologyDeleter(deleteTopology(log, eq1))
// we only expect a single message to arrive or
// a duplicate message due to network issues.
expectedMsg := eq1.NextSubMsg()
amqp.RegisterHandler(eq1.Queue, func(ctx context.Context, d types.Delivery) error {
msg := string(d.Body)
log.Infof("subscriber of %s received message: %s", eq1.Queue, msg)
assert.Equal(t, expectedMsg, msg)
cancel()
return nil
})
err := amqp.Start(
cctx,
testutils.HealthyConnectURL,
amqpx.WithName(funcName),
amqpx.WithLogger(logging.NewNoOpLogger()),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(5),
amqpx.WithCloseTimeout(time.Minute),
)
if err != nil {
assert.NoError(t, err)
return
}
// publish event to first queue
// due to bad network it is possible that the message is received multiple times.
// that is why we pass context.TODO() to the publish method in order to avoid
// aborting a secondary retry which would return an error here.
tctx, tcancel := context.WithTimeout(context.TODO(), 10*time.Second)
defer tcancel()
err = amqp.Publish(tctx, eq1.Exchange, eq1.RoutingKey, types.Publishing{
ContentType: "text/plain",
Body: []byte(eq1.NextPubMsg()),
})
if err != nil {
assert.NoError(t, err)
return
}
// will be canceled when the event has reache dthe third handler
<-cctx.Done()
log.Info("context canceled, closing test.")
}
func TestAMQPXSubAndPubMulti(t *testing.T) {
t.Parallel()
var (
amqp = amqpx.New()
log = logging.NewTestLogger(t)
cctx, cancel = context.WithCancel(context.TODO())
funcName = testutils.FuncName()
nextExchangeQueue = testutils.NewExchangeQueueGenerator(funcName)
eq1 = nextExchangeQueue()
eq2 = nextExchangeQueue()
eq3 = nextExchangeQueue()
)
defer cancel()
defer func() {
log.Info("closing amqp")
assert.NoError(t, amqp.Close())
}()
amqp.RegisterTopologyCreator(createTopology(log, eq1, eq2, eq3))
amqp.RegisterTopologyDeleter(deleteTopology(log, eq1, eq2, eq3))
// publish -> queue-01 -> subscriber-01 -> queue-02 -> subscriber-02 -> queue-03 -> subscriber-03 -> cancel context
amqp.RegisterHandler(eq1.Queue, func(ctx context.Context, msg types.Delivery) error {
log.Infof("handler of %s", eq1.Queue)
assert.Equal(t, eq1.NextSubMsg(), string(msg.Body))
err := amqp.Publish(ctx, eq2.Exchange, eq2.RoutingKey, types.Publishing{
ContentType: msg.ContentType,
Body: msg.Body,
})
if err != nil {
log.Errorf("%s: %v", eq1.Queue, err)
assert.NoError(t, err)
}
return nil
},
types.ConsumeOptions{
ConsumerTag: eq1.ConsumerTag,
},
)
amqp.RegisterHandler(eq2.Queue, func(ctx context.Context, msg types.Delivery) error {
log.Infof("handler of %s", eq2.Queue)
err := amqp.Publish(ctx, eq3.Exchange, eq3.RoutingKey, types.Publishing{
ContentType: msg.ContentType,
Body: msg.Body,
})
if err != nil {
log.Errorf("%s: %v", eq2.Queue, err)
}
return nil
}, types.ConsumeOptions{ConsumerTag: eq2.ConsumerTag})
amqp.RegisterHandler(eq3.Queue, func(ctx context.Context, msg types.Delivery) error {
log.Infof("handler of %s: canceling context!", eq3.Queue)
cancel()
return nil
}, types.ConsumeOptions{ConsumerTag: eq3.ConsumerTag})
err := amqp.Start(
cctx,
testutils.HealthyConnectURL,
amqpx.WithName(funcName),
amqpx.WithLogger(log),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(5),
amqpx.WithCloseTimeout(time.Minute),
)
if err != nil {
assert.NoError(t, err)
return
}
// publish event to first queue
err = amqp.Publish(cctx, eq1.Exchange, eq1.RoutingKey, types.Publishing{
ContentType: "text/plain",
Body: []byte(eq1.NextPubMsg()),
})
if err != nil {
assert.NoError(t, err)
return
}
// will be canceled when the event has reache dthe third handler
<-cctx.Done()
log.Info("context canceled, closing test.")
}
func TestAMQPXSubHandler(t *testing.T) {
t.Parallel()
var (
amqp = amqpx.New()
log = logging.NewTestLogger(t)
cctx, cancel = context.WithCancel(context.TODO())
funcName = testutils.FuncName()
nextExchangeQueue = testutils.NewExchangeQueueGenerator(funcName)
eq1 = nextExchangeQueue()
)
defer func() {
log.Info("canceling context")
cancel()
log.Info("closing amqp")
assert.NoError(t, amqp.Close())
}()
amqp.RegisterTopologyCreator(createTopology(log, eq1))
amqp.RegisterTopologyDeleter(deleteTopology(log, eq1))
// we want to only receive one message or one duplicate message
expectedMsg := eq1.NextSubMsg()
amqp.RegisterHandler(eq1.Queue, func(ctx context.Context, d types.Delivery) error {
msg := string(d.Body)
log.Infof("subscriber of %s: received message: %s", eq1.Queue, msg)
assert.Equal(t, expectedMsg, msg)
log.Info("canceling context from within handler")
cancel()
return nil
})
err := amqp.Start(
cctx,
testutils.HealthyConnectURL,
amqpx.WithName(funcName),
amqpx.WithLogger(logging.NewNoOpLogger()),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(5),
amqpx.WithCloseTimeout(time.Minute),
)
if err != nil {
assert.NoError(t, err)
return
}
// publish event to first queue
// due to bad network it is possible that the message is received multiple times.
// that is why we pass context.TODO() to the publish method in order to avoid
// aborting a secondary retry which would return an error here.
tctx, tcancel := context.WithTimeout(context.TODO(), 10*time.Second)
defer tcancel()
err = amqp.Publish(tctx, eq1.Exchange, eq1.RoutingKey, types.Publishing{
ContentType: "text/plain",
Body: []byte(eq1.NextPubMsg()),
})
if err != nil {
assert.NoError(t, err)
return
}
// will be canceled when the event has reache dthe third handler
<-cctx.Done()
log.Info("context canceled, closing test.")
}
func TestCreateDeleteTopology(t *testing.T) {
t.Parallel()
var (
amqp = amqpx.New()
log = logging.NewTestLogger(t)
cctx, cancel = context.WithCancel(context.TODO())
funcName = testutils.FuncName()
nextExchangeQueue = testutils.NewExchangeQueueGenerator(funcName)
eq1 = nextExchangeQueue()
)
defer cancel()
defer func() {
log.Info("closing amqp")
assert.NoError(t, amqp.Close())
}()
amqp.RegisterTopologyCreator(createTopology(log, eq1))
amqp.RegisterTopologyDeleter(deleteTopology(log, eq1))
err := amqp.Start(
cctx,
testutils.HealthyConnectURL,
amqpx.WithName(funcName),
amqpx.WithLogger(log),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(2),
amqpx.WithCloseTimeout(time.Minute),
)
assert.NoError(t, err)
}
func TestPauseResumeHandlerNoProcessing(t *testing.T) {
t.Parallel()
var (
amqp = amqpx.New()
log = logging.NewTestLogger(t)
cctx, cancel = context.WithCancel(context.TODO())
funcName = testutils.FuncName()
nextQueueName = testutils.QueueNameGenerator(funcName)
queueName = nextQueueName()
)
defer cancel()
defer func() {
log.Info("closing amqp")
assert.NoError(t, amqp.Close())
}()
amqp.RegisterTopologyCreator(func(ctx context.Context, t *pool.Topologer) error {
_, err := t.QueueDeclare(ctx, queueName)
if err != nil {
return err
}
return nil
})
amqp.RegisterTopologyDeleter(func(ctx context.Context, t *pool.Topologer) error {
_, err := t.QueueDelete(ctx, queueName)
if err != nil {
return err
}
return nil
})
handler := amqp.RegisterHandler(queueName, func(ctx context.Context, d types.Delivery) error {
log.Info("received message")
return nil
})
err := amqp.Start(
cctx,
testutils.HealthyConnectURL,
amqpx.WithName(funcName),
amqpx.WithLogger(logging.NewNoOpLogger()),
amqpx.WithCloseTimeout(time.Minute),
)
if err != nil {
assert.NoError(t, err)
return
}
for i := 0; i < 5; i++ {
t.Logf("iteration %d", i)
assertActive(t, handler, true)
err = handler.Pause(cctx)
if err != nil {
assert.NoError(t, err)
return
}
assertActive(t, handler, false)
err = handler.Resume(cctx)
if err != nil {
assert.NoError(t, err)
return
}
assertActive(t, handler, true)
}
}
func TestHandlerPauseAndResumeSubscriber(t *testing.T) {
t.Parallel()
var (
amqp = amqpx.New()
log = logging.NewTestLogger(t)
cctx, cancel = context.WithCancel(context.TODO())
funcName = testutils.FuncName()
nextExchangeQueue = testutils.NewExchangeQueueGenerator(funcName)
eq1 = nextExchangeQueue()
)
defer cancel()
defer func() {
log.Info("closing amqp")
assert.NoError(t, amqp.Close())
}()
options := []amqpx.Option{
amqpx.WithLogger(logging.NewNoOpLogger()),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(1),
amqpx.WithCloseTimeout(time.Minute),
}
amqpPub := amqpx.New()
amqpPub.RegisterTopologyCreator(createTopology(log, eq1))
amqp.RegisterTopologyDeleter(deleteTopology(log, eq1))
defer func() {
assert.NoError(t, amqpPub.Close())
}()
err := amqpPub.Start(
cctx,
testutils.HealthyConnectURL,
append(options, amqpx.WithName(funcName+"-pub"))...,
)
require.NoError(t, err)
var (
publish = 10
cnt = 0
processingFinshed = make(chan struct{})
initialBatchSize = 2
subscriberFlushTimeout = 500 * time.Millisecond
finalBatchSize = 1
)
// step 2 - process messages, pause, wait, resume, process rest, cancel context
handler := amqp.RegisterBatchHandler(eq1.Queue, func(hctx context.Context, msgs []types.Delivery) (err error) {
select {
case <-hctx.Done():
return fmt.Errorf("handler context canceled before processing: %w", hctx.Err())
default:
// nothing
}
for _, msg := range msgs {
assert.Equal(t, eq1.NextSubMsg(), string(msg.Body))
cnt++
}
if cnt == publish {
close(processingFinshed)
}
return nil
},
pool.WithMaxBatchSize(initialBatchSize),
pool.WithBatchFlushTimeout(subscriberFlushTimeout),
)
err = amqp.Start(cctx, testutils.HealthyConnectURL,
amqpx.WithName(funcName+"-sub"),
amqpx.WithLogger(log),
amqpx.WithCloseTimeout(time.Minute),
)
if err != nil {
assert.NoError(t, err)
return
}
// publish half of the messages
for i := 0; i < publish/2; i++ {
err := amqpPub.Publish(cctx, eq1.Exchange, eq1.RoutingKey, types.Publishing{
ContentType: "text/plain",
Body: []byte(eq1.NextPubMsg()),
})
if err != nil {
assert.NoError(t, err)
return
}
}
time.Sleep(2 * subscriberFlushTimeout)
// pause and reduce batch size and resume
reconnectTimeout := 2 * time.Minute
pauseCtx, cancel := context.WithTimeout(cctx, reconnectTimeout)
err = handler.Pause(pauseCtx)
cancel()
assert.NoError(t, err)
handler.SetMaxBatchSize(finalBatchSize)
resumeCtx, cancel := context.WithTimeout(cctx, reconnectTimeout)
err = handler.Resume(resumeCtx)
cancel()
assert.NoError(t, err)
// publish rest of messages
for i := 0; i < publish/2; i++ {
err := amqpPub.Publish(cctx, eq1.Exchange, eq1.RoutingKey, types.Publishing{
ContentType: "text/plain",
Body: []byte(eq1.NextPubMsg()),
})
if err != nil {
assert.NoError(t, err)
return
}
}
// await for subscriber to consume all messages before finishing test
publishFinishTimeout := time.Duration(publish/2) * 500 * time.Millisecond // max one second per message
select {
case <-time.After(publishFinishTimeout):
t.Errorf("timeout after %s", publishFinishTimeout)
return
case <-processingFinshed:
log.Info("processing finished successfully")
}
}
func TestHandlerPauseAndResumeInFlightNackSubscriber(t *testing.T) {
t.Parallel()
var (
log = logging.NewTestLogger(t)
cctx, cancel = context.WithCancel(context.TODO())
funcName = testutils.FuncName()
nextExchangeQueue = testutils.NewExchangeQueueGenerator(funcName)
eq1 = nextExchangeQueue()
)
defer cancel()
var (
publish = 10
initialBatchSize = publish * 2 // higher than number of published messages in order to enforce messages to be in flight
subscriberFlushTimeout = 3 * time.Second // also use a high timeout in order to enforce messages to be in flight
cnt = 0
processingFinshed = make(chan struct{})
finalBatchSize = 1
redeliveryLimit = types.DefaultQueueDeliveryLimit - 1
redeliveryChan = make(chan struct{}, redeliveryLimit)
)
options := []amqpx.Option{
amqpx.WithLogger(logging.NewNoOpLogger()),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(1),
amqpx.WithCloseTimeout(time.Minute),
}
// publish messages
amqpPub := amqpx.New()
amqpPub.RegisterTopologyCreator(createTopology(log, eq1))
amqpPub.RegisterTopologyDeleter(deleteTopology(log, eq1))
err := amqpPub.Start(
cctx,
testutils.HealthyConnectURL,
append(options, amqpx.WithName(funcName+"-pub"))...,
)
if !assert.NoError(t, err) {
return
}
defer func() {
assert.NoError(t, amqpPub.Close())
}()
for i := 0; i < publish; i++ {
err := amqpPub.Publish(cctx, eq1.Exchange, eq1.RoutingKey, types.Publishing{
ContentType: "text/plain",
Body: []byte(eq1.NextPubMsg()),
})
if err != nil {
assert.NoError(t, err)
return
}
}
// INFO: The issue here seems to be that the first message exceeds the DeliveryLimit and is added to the end of the queue.
// which is why the order is not preserved.
amqp := amqpx.New()
proceedChan := make(chan struct{})
once := sync.Once{}
handler := amqp.RegisterBatchHandler(eq1.Queue, func(hctx context.Context, msgs []types.Delivery) (err error) {
select {
case <-hctx.Done():
return hctx.Err() // additional nack & requeue
case redeliveryChan <- struct{}{}:
// nack & requeue the message for a limited amout of times
return fmt.Errorf("we don't want the message to be processed, yet") // nack & requeue for every token that could be put in the channel
default:
once.Do(func() {
close(proceedChan)
})
}
// at this point the order is not supposed to be.
// The bigger the batch, the more data we loose
for _, msg := range msgs {
assert.Equal(t, eq1.NextSubMsg(), string(msg.Body))
cnt++
}
if cnt == publish {
close(processingFinshed)
}
return nil
},
pool.WithMaxBatchSize(initialBatchSize),
pool.WithBatchFlushTimeout(subscriberFlushTimeout),
)
err = amqp.Start(cctx, testutils.HealthyConnectURL,
amqpx.WithName(funcName+"-sub"),
amqpx.WithLogger(log),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(1),
amqpx.WithCloseTimeout(time.Minute),
)
if err != nil {
assert.NoError(t, err)
return
}
defer func() {
log.Info("closing amqp")
assert.NoError(t, amqp.Close())
}()
select {
case <-proceedChan:
// can procees^
case <-time.After(time.Minute):
}
// pause and reduce batch size and resume
reconnectTimeout := 2 * time.Minute
pauseCtx, cancel := context.WithTimeout(cctx, reconnectTimeout)
err = handler.Pause(pauseCtx)
cancel()
if !assert.NoError(t, err) {
return
}
handler.SetMaxBatchSize(finalBatchSize)
time.Sleep(2 * time.Second)
resumeCtx, cancel := context.WithTimeout(cctx, reconnectTimeout)
err = handler.Resume(resumeCtx)
cancel()
if !assert.NoError(t, err) {
return
}
// allow processing without nacks
// await for subscriber to consume all messages before finishing test
publishFinishTimeout := time.Duration(publish) * time.Second // max one second per message
select {
case <-time.After(publishFinishTimeout):
t.Errorf("timeout after %s", publishFinishTimeout)
return
case <-processingFinshed:
log.Info("processing finished successfully")
}
}
// This test tests that the requeued messages preserve their order until the requeue limit is reached.
// IMPORTANT: This test requires RabbitMQ 4.0 or higher, as it uses the x-arguments to set the requeue limit.
// TODO: we loose message 0 and message 1 on ubuntu tests
// we get messages 2, 3, 4, 5, 6, 7, 8, 9
func TestRequeueLimitPreserveOrderOK(t *testing.T) {
// we test that an event is requeued to the front of the queue as many times as it was defined.
// https://www.rabbitmq.com/docs/quorum-queues#repeated-requeues
t.Parallel()
var (
log = logging.NewTestLogger(t)
cctx, cancel = context.WithCancel(context.TODO())
funcName = testutils.FuncName()
nextExchangeQueue = testutils.NewExchangeQueueGenerator(funcName)
eq1 = nextExchangeQueue()
)
log.SetLevel(0)
defer cancel()
var (
publish = 10 // explicitly this combination of values causes the out of order issue of the batch handler
initialBatchSize = 2
subscriberFlushTimeout = 500 * time.Millisecond
finalBatchSize = 1
// in case that this value is changed to a higher value, the test will fail, which is when the number of allowed requeues is exceeded.
// aftet that requeue limit is reached, messages are not returned back to the front of the queue but at the end.
// This prevents the raft log from growing indefinitely.
redeliveryLimit = types.DefaultQueueDeliveryLimit
nackProcessingFinished = make(chan struct{})
processingFinshed = make(chan struct{})
)
// create publisher, create topology & publish messages
pub := amqpx.New()
pub.RegisterTopologyCreator(createTopology(log, eq1))
pub.RegisterTopologyDeleter(deleteTopology(log, eq1))
err := pub.Start(
cctx,
testutils.HealthyConnectURL,
amqpx.WithLogger(log),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(1),
amqpx.WithCloseTimeout(time.Minute),
)
if !assert.NoError(t, err) {
return
}
defer func() {
log.Info("closing publisher")
assert.NoError(t, pub.Close())
}()
for i := 0; i < publish; i++ {
err := pub.Publish(cctx, eq1.Exchange, eq1.RoutingKey, types.Publishing{
ContentType: "text/plain",
Body: []byte(eq1.NextPubMsg()),
})
if !assert.NoError(t, err) {
return
}
}
time.Sleep(2 * time.Second)
// create subscriber & start consuming messages but fail to process them which results in them being requeued
sub := amqpx.New()
redeliveryCounter := 0
var once sync.Once
handler := sub.RegisterBatchHandler(eq1.Queue, func(bctx context.Context, msgs []types.Delivery) (err error) {
redeliveryCounter++
if redeliveryCounter >= redeliveryLimit-2 { // only -2 is needed, but for debugging purposes in the fronend we add another -1
once.Do(func() {
close(nackProcessingFinished)
})
log.Info("blocking processing")
<-bctx.Done()
log.Info("unblocking processing")
// INFO: additional redelivery once the context is canceled
return bctx.Err() // reject & requeue, additional redelivery that is still supposed to have the correct order.
}
return fmt.Errorf("requeue %d messages", len(msgs))
},
pool.WithMaxBatchSize(initialBatchSize),
pool.WithBatchFlushTimeout(subscriberFlushTimeout),
)
err = sub.Start(
cctx,
testutils.HealthyConnectURL,
amqpx.WithLogger(log),
amqpx.WithPublisherConnections(0), // subscriber only pool
amqpx.WithPublisherSessions(0), // subscriber only pool
amqpx.WithCloseTimeout(time.Minute),
)
if !assert.NoError(t, err) {
return
}
defer func() {
log.Info("closing subscriber")
assert.NoError(t, sub.Close())
}()
select {
case <-nackProcessingFinished:
log.Info("nack processing finished")
case <-time.After(10 * time.Second):
t.Errorf("nack test timeout after 10 seconds")
return
}
// pause, reduce batch size and resume and start processing the messages properly
reconnectTimeout := 2 * time.Minute
pauseCtx, cancel := context.WithTimeout(cctx, reconnectTimeout)
err = handler.Pause(pauseCtx)
cancel()
if !assert.NoError(t, err) {
return
}
time.Sleep(1 * time.Second)
var cnt int64 = 0
handler.SetMaxBatchSize(finalBatchSize)
// INFO: additional redilivery for final consumption
handler.SetHandlerFunc(func(hctx context.Context, msgs []types.Delivery) error {
select {
case <-hctx.Done():
return fmt.Errorf("handler context canceled before processing: %w", hctx.Err())
default:
// process
}
// At this point the order is NOT is not supposed to be broken.
// The bigger the batch, the more data we loose
for _, msg := range msgs {
log.Printf("received message: %s", string(msg.Body))
err := eq1.ValidateNextSubMsg(string(msg.Body))
assert.NoError(t, err)
}
if atomic.AddInt64(&cnt, int64(len(msgs))) == int64(publish) {
close(processingFinshed)
}
return nil
})
resumeCtx, cancel := context.WithTimeout(cctx, reconnectTimeout)
err = handler.Resume(resumeCtx)
cancel()
if !assert.NoError(t, err) {
return
}
// await for subscriber to consume all messages before finishing test
publishFinishTimeout := time.Duration(publish) * time.Second // max one second per message
select {
case <-time.After(publishFinishTimeout):
close(processingFinshed)
<-processingFinshed
t.Errorf("ack timeout after %s: received %d / %d messages", publishFinishTimeout, cnt, publish)
case <-processingFinshed:
log.Info("processing finished successfully")
}
}
func TestHandlerPauseAndResume(t *testing.T) {
t.Parallel()
var wg sync.WaitGroup
defer wg.Wait()
iterations := 1000
closeTimeout := max(time.Duration(iterations/3)*time.Second, 10*time.Second)
wg.Add(iterations)
for i := 0; i < iterations; i++ {
go func(i int) {
defer wg.Done()
testHandlerPauseAndResume(t, i, closeTimeout)
}(i)
}
}
func testHandlerPauseAndResume(t *testing.T, i int, closeTimeout time.Duration) {
var (
amqp = amqpx.New()
log = logging.NewTestLogger(t)
cctx, cancel = context.WithCancel(context.TODO())
funcName = fmt.Sprintf("%s-%d", testutils.CallerFuncName(), i)
nextExchangeQueue = testutils.NewExchangeQueueGenerator(funcName)
eq1 = nextExchangeQueue()
eq2 = nextExchangeQueue()
eq3 = nextExchangeQueue()
)
defer cancel()
defer func() {
log.Info("closing amqp")
assert.NoError(t, amqp.Close())
}()
options := []amqpx.Option{
amqpx.WithLogger(logging.NewNoOpLogger()),
amqpx.WithPublisherConnections(1),
amqpx.WithPublisherSessions(5),
amqpx.WithCloseTimeout(closeTimeout),
}
amqpPub := amqpx.New()
amqpPub.RegisterTopologyCreator(createTopology(log, eq1, eq2, eq3))
amqpPub.RegisterTopologyDeleter(deleteTopology(log, eq1, eq2, eq3))