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A Java-based performance testing tool for RabbitMQ.
// Copyright (c) 2007-2019 Pivotal Software, Inc. All rights reserved.
//
// This software, the RabbitMQ Java client library, is triple-licensed under the
// Mozilla Public License 1.1 ("MPL"), the GNU General Public License version 2
// ("GPL") and the Apache License version 2 ("ASL"). For the MPL, please see
// LICENSE-MPL-RabbitMQ. For the GPL, please see LICENSE-GPL2. For the ASL,
// please see LICENSE-APACHE2.
//
// This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
// either express or implied. See the LICENSE file for specific language governing
// rights and limitations of this software.
//
// If you have any questions regarding licensing, please contact us at
// [email protected].
package com.rabbitmq.perf;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ShutdownSignalException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicReference;
import static com.rabbitmq.perf.Recovery.setupRecoveryProcess;
public class MulticastParams {
private long confirm = -1;
private int confirmTimeout = 30;
private int consumerCount = 1;
private int producerCount = 1;
private int consumerChannelCount = 1;
private int producerChannelCount = 1;
private int consumerTxSize = 0;
private int producerTxSize = 0;
private int channelPrefetch = 0;
private int consumerPrefetch = 0;
private int minMsgSize = 0;
private int timeLimit = 0;
private float producerRateLimit = -1.0f;
private float consumerRateLimit = -1.0f;
private int producerMsgCount = 0;
private int consumerMsgCount = 0;
private boolean consumerSlowStart = false;
private String exchangeName = "direct";
private String exchangeType = "direct";
private List queueNames = new ArrayList<>();
private String routingKey = null;
private boolean randomRoutingKey = false;
private boolean skipBindingQueues = false;
private List flags = new ArrayList<>();
private int multiAckEvery = 0;
private boolean autoAck = false;
private boolean autoDelete = true;
private List bodyFiles = new ArrayList<>();
private String bodyContentType = null;
private boolean predeclared = false;
private boolean useMillis = false;
private Map queueArguments = null;
private int consumerLatencyInMicroseconds = 0;
private String queuePattern = null;
private int queueSequenceFrom = -1;
private int queueSequenceTo = -1;
private Map messageProperties = null;
private TopologyHandler topologyHandler;
private TopologyRecording topologyRecording;
private int heartbeatSenderThreads = -1;
private int routingKeyCacheSize = 0;
private boolean exclusive = false;
private int publishingInterval = -1;
private int producerRandomStartDelayInSeconds;
private int producerSchedulerThreadCount = -1;
private int consumersThreadPools = -1;
private int shutdownTimeout = 5;
private int serversStartUpTimeout = -1;
private int serversUpLimit = -1;
private List publishingRates = new ArrayList<>();
private List messageSizes = new ArrayList<>();
private boolean polling = false;
private int pollingInterval = -1;
private boolean nack = false;
private boolean jsonBody = false;
private int bodyFieldCount = 1000;
private int bodyCount = 100;
// for random JSON body generation
private AtomicReference messageBodySourceReference = new AtomicReference<>();
public void setExchangeType(String exchangeType) {
this.exchangeType = exchangeType;
}
public void setExchangeName(String exchangeName) {
this.exchangeName = exchangeName;
}
public void setQueueNames(List queueNames) {
if(queueNames == null) {
this.queueNames = new ArrayList<>();
} else {
this.queueNames = new ArrayList<>(queueNames);
}
}
public void setRoutingKey(String routingKey) {
this.routingKey = routingKey;
}
public void setRandomRoutingKey(boolean randomRoutingKey) {
this.randomRoutingKey = randomRoutingKey;
}
public void setSkipBindingQueues(boolean skipBindingQueues) {
this.skipBindingQueues = skipBindingQueues;
}
public void setProducerRateLimit(float producerRateLimit) {
this.producerRateLimit = producerRateLimit;
}
public void setProducerCount(int producerCount) {
this.producerCount = producerCount;
}
public void setProducerChannelCount(int producerChannelCount) {
this.producerChannelCount = producerChannelCount;
}
public void setConsumerRateLimit(float consumerRateLimit) {
this.consumerRateLimit = consumerRateLimit;
}
public void setConsumerCount(int consumerCount) {
this.consumerCount = consumerCount;
}
public void setConsumerChannelCount(int consumerChannelCount) {
this.consumerChannelCount = consumerChannelCount;
}
public void setConsumerSlowStart(boolean slowStart) {
this.consumerSlowStart = slowStart;
}
public void setProducerTxSize(int producerTxSize) {
this.producerTxSize = producerTxSize;
}
public void setConsumerTxSize(int consumerTxSize) {
this.consumerTxSize = consumerTxSize;
}
public void setConfirm(long confirm) {
this.confirm = confirm;
}
// package protected for testing
long getConfirm() {
return this.confirm;
}
public void setConfirmTimeout(int confirmTimeout) {
this.confirmTimeout = confirmTimeout;
}
public void setAutoAck(boolean autoAck) {
this.autoAck = autoAck;
}
public void setMultiAckEvery(int multiAckEvery) {
this.multiAckEvery = multiAckEvery;
}
public void setChannelPrefetch(int channelPrefetch) {
this.channelPrefetch = channelPrefetch;
}
public void setConsumerPrefetch(int consumerPrefetch) {
this.consumerPrefetch = consumerPrefetch;
}
public void setMinMsgSize(int minMsgSize) {
this.minMsgSize = minMsgSize;
}
public void setTimeLimit(int timeLimit) {
this.timeLimit = timeLimit;
}
public void setUseMillis(boolean useMillis) {
this.useMillis = useMillis;
}
public void setProducerMsgCount(int producerMsgCount) {
this.producerMsgCount = producerMsgCount;
}
public void setConsumerMsgCount(int consumerMsgCount) {
this.consumerMsgCount = consumerMsgCount;
}
public void setMsgCount(int msgCount) {
setProducerMsgCount(msgCount);
setConsumerMsgCount(msgCount);
}
public void setFlags(List flags) {
this.flags = flags;
}
public void setAutoDelete(boolean autoDelete) {
this.autoDelete = autoDelete;
}
public void setPredeclared(boolean predeclared) {
this.predeclared = predeclared;
}
public void setQueueArguments(Map queueArguments) {
this.queueArguments = queueArguments;
}
public void setConsumerLatencyInMicroseconds(int consumerLatencyInMicroseconds) {
this.consumerLatencyInMicroseconds = consumerLatencyInMicroseconds;
}
public void setMessageProperties(Map messageProperties) {
this.messageProperties = messageProperties;
}
public void setConsumersThreadPools(int consumersThreadPools) {
this.consumersThreadPools = consumersThreadPools;
}
public void setShutdownTimeout(int shutdownTimeout) {
this.shutdownTimeout = shutdownTimeout;
}
public void setServersStartUpTimeout(int serversStartUpTimeout) {
this.serversStartUpTimeout = serversStartUpTimeout;
}
public void setServersUpLimit(int serversUpLimit) {
this.serversUpLimit = serversUpLimit;
}
public void setPublishingRates(List publishingRates) {
this.publishingRates = publishingRates;
}
public int getConsumerCount() {
return consumerCount;
}
public int getConsumerChannelCount() {
return consumerChannelCount;
}
public boolean getConsumerSlowStart() {
return consumerSlowStart;
}
public int getConsumerThreadCount() {
return consumerCount * consumerChannelCount;
}
public int getProducerCount() {
return producerCount;
}
public int getProducerChannelCount() {
return producerChannelCount;
}
public int getProducerThreadCount() {
return producerCount * producerChannelCount;
}
public int getMinMsgSize() {
return minMsgSize;
}
public float getProducerRateLimit() {
return producerRateLimit;
}
public void setBodyFiles(List bodyFiles) {
if (bodyFiles == null) {
this.bodyFiles = new ArrayList<>();
} else {
this.bodyFiles = new ArrayList<>(bodyFiles);
}
}
List getBodyFiles() {
return Collections.unmodifiableList(this.bodyFiles);
}
public void setBodyContentType(String bodyContentType) {
this.bodyContentType = bodyContentType;
}
String getBodyContentType() {
return bodyContentType;
}
public void setQueuePattern(String queuePattern) {
this.queuePattern = queuePattern;
}
public void setQueueSequenceFrom(int queueSequenceFrom) {
this.queueSequenceFrom = queueSequenceFrom;
}
public void setQueueSequenceTo(int queueSequenceTo) {
this.queueSequenceTo = queueSequenceTo;
}
public void setHeartbeatSenderThreads(int heartbeatSenderThreads) {
this.heartbeatSenderThreads = heartbeatSenderThreads;
}
public void setMessageSizes(List messageSizes) {
this.messageSizes = messageSizes;
}
public int getHeartbeatSenderThreads() {
return heartbeatSenderThreads <= 0 ? producerCount + consumerCount : this.heartbeatSenderThreads;
}
public int getTimeLimit() {
return timeLimit;
}
public int getProducerMsgCount() {
return producerMsgCount;
}
public int getConsumerMsgCount() {
return consumerMsgCount;
}
public void setRoutingKeyCacheSize(int routingKeyCacheSize) {
this.routingKeyCacheSize = routingKeyCacheSize;
}
public int getConsumersThreadPools() {
return consumersThreadPools;
}
public int getShutdownTimeout() {
return shutdownTimeout;
}
public int getServersStartUpTimeout() {
return serversStartUpTimeout;
}
public int getServersUpLimit() {
return serversUpLimit;
}
public List getPublishingRates() {
return publishingRates;
}
public List getMessageSizes() {
return messageSizes;
}
public void setPolling(boolean polling) {
this.polling = polling;
}
public boolean isPolling() {
return polling;
}
public void setPollingInterval(int pollingInterval) {
this.pollingInterval = pollingInterval;
}
public void setNack(boolean nack) {
this.nack = nack;
}
public void setJsonBody(boolean jsonBody) {
this.jsonBody = jsonBody;
}
public void setBodyFieldCount(int bodyFieldCount) {
this.bodyFieldCount = bodyFieldCount;
}
public void setBodyCount(int bodyCount) {
this.bodyCount = bodyCount;
}
public Producer createProducer(Connection connection, Stats stats, MulticastSet.CompletionHandler completionHandler,
ValueIndicator rateIndicator, ValueIndicator messageSizeIndicator) throws IOException {
Channel channel = connection.createChannel(); //NOSONAR
if (producerTxSize > 0) channel.txSelect();
if (confirm >= 0) channel.confirmSelect();
TopologyRecording topologyRecording = new TopologyRecording(this.isPolling());
if (!predeclared || !exchangeExists(connection, exchangeName)) {
channel.exchangeDeclare(exchangeName, exchangeType);
topologyRecording.recordExchange(exchangeName, exchangeType);
}
MessageBodySource messageBodySource;
TimestampProvider tsp;
if (bodyFiles.size() > 0) {
tsp = new TimestampProvider(useMillis, true);
messageBodySource = new LocalFilesMessageBodySource(bodyFiles, bodyContentType);
} else if (jsonBody) {
tsp = new TimestampProvider(useMillis, true);
if (messageBodySourceReference.get() == null) {
messageBodySourceReference.set(new RandomJsonMessageBodySource(minMsgSize, bodyFieldCount, bodyCount));
}
messageBodySource = messageBodySourceReference.get();
} else {
tsp = new TimestampProvider(useMillis, false);
messageBodySource = new TimeSequenceMessageBodySource(tsp, messageSizeIndicator);
}
Recovery.RecoveryProcess recoveryProcess = setupRecoveryProcess(connection, topologyRecording);
final Producer producer = new Producer(new ProducerParameters()
.setChannel(channel).setExchangeName(exchangeName).setId(this.topologyHandler.getRoutingKey())
.setRandomRoutingKey(randomRoutingKey).setFlags(flags).setTxSize(producerTxSize)
.setMsgLimit(producerMsgCount).setConfirm(confirm)
.setConfirmTimeout(confirmTimeout).setMessageBodySource(messageBodySource).setTsp(tsp)
.setStats(stats).setMessageProperties(messageProperties).setCompletionHandler(completionHandler)
.setRoutingKeyCacheSize(this.routingKeyCacheSize)
.setRandomStartDelayInSeconds(this.producerRandomStartDelayInSeconds)
.setRecoveryProcess(recoveryProcess)
.setRateIndicator(rateIndicator)
);
channel.addReturnListener(producer);
channel.addConfirmListener(producer);
this.topologyHandler.next();
return producer;
}
public Consumer createConsumer(Connection connection, Stats stats, MulticastSet.CompletionHandler completionHandler, ExecutorService executorService) throws IOException {
TopologyHandlerResult topologyHandlerResult = this.topologyHandler.configureQueuesForClient(connection);
connection = topologyHandlerResult.connection;
Channel channel = connection.createChannel(); //NOSONAR
if (consumerTxSize > 0) channel.txSelect();
if (consumerPrefetch > 0) channel.basicQos(consumerPrefetch);
if (channelPrefetch > 0) channel.basicQos(channelPrefetch, true);
boolean timestampInHeader;
if (bodyFiles.size() > 0 || jsonBody) {
timestampInHeader = true;
} else {
timestampInHeader = false;
}
TimestampProvider tsp = new TimestampProvider(useMillis, timestampInHeader);
Recovery.RecoveryProcess recoveryProcess = setupRecoveryProcess(connection, topologyHandlerResult.topologyRecording);
Consumer consumer = new Consumer(
new ConsumerParameters()
.setChannel(channel)
.setId(this.topologyHandler.getRoutingKey())
.setQueueNames(topologyHandlerResult.configuredQueues)
.setTxSize(consumerTxSize)
.setAutoAck(autoAck)
.setMultiAckEvery(multiAckEvery)
.setStats(stats)
.setRateLimit(consumerRateLimit)
.setMsgLimit(consumerMsgCount)
.setConsumerLatencyInMicroSeconds(consumerLatencyInMicroseconds)
.setTimestampProvider(tsp)
.setCompletionHandler(completionHandler)
.setRecoveryProcess(recoveryProcess)
.setExecutorService(executorService)
.setPolling(this.polling)
.setPollingInterval(this.pollingInterval)
.setNack(this.nack)
);
this.topologyHandler.next();
return consumer;
}
public TopologyHandlerResult configureAllQueues(Connection connection) throws IOException {
return this.topologyHandler.configureAllQueues(connection);
}
public void init() {
this.topologyRecording = new TopologyRecording(this.isPolling());
if (this.queuePattern == null) {
this.topologyHandler = new FixedQueuesTopologyHandler(this, this.routingKey, this.queueNames, topologyRecording);
} else {
this.topologyHandler = new SequenceTopologyHandler(this, this.queueSequenceFrom, this.queueSequenceTo, this.queuePattern, topologyRecording);
}
}
public void resetTopologyHandler() {
this.topologyHandler.reset();
}
public void deleteAutoDeleteQueuesIfNecessary(Connection connection) throws IOException, TimeoutException {
if (this.polling) {
try (Channel channel = connection.createChannel()) {
for (TopologyRecording.RecordedQueue queue : this.topologyRecording.queues()) {
if (queue.isAutoDelete() && !queue.isExclusive()) {
if (Thread.interrupted()) {
return;
}
channel.queueDelete(queue.name());
}
}
}
}
}
private static boolean exchangeExists(Connection connection, final String exchangeName) throws IOException {
if ("".equals(exchangeName)) {
// NB: default exchange always exists
return true;
} else {
return exists(connection, ch -> ch.exchangeDeclarePassive(exchangeName));
}
}
private static boolean queueExists(Connection connection, final String queueName) throws IOException {
return queueName != null && exists(connection, ch -> ch.queueDeclarePassive(queueName));
}
public boolean hasLimit() {
return this.timeLimit > 0 || this.consumerMsgCount > 0 || this.producerMsgCount > 0;
}
public void setExclusive(boolean exclusive) {
this.exclusive = exclusive;
}
public boolean isExclusive() {
return exclusive;
}
public void setPublishingInterval(int publishingIntervalInSeconds) {
this.publishingInterval = publishingIntervalInSeconds;
}
public int getPublishingInterval() {
return publishingInterval;
}
public void setProducerRandomStartDelayInSeconds(int producerRandomStartDelayInSeconds) {
this.producerRandomStartDelayInSeconds = producerRandomStartDelayInSeconds;
}
public int getProducerRandomStartDelayInSeconds() {
return producerRandomStartDelayInSeconds;
}
public int getProducerSchedulerThreadCount() {
return producerSchedulerThreadCount;
}
public void setProducerSchedulerThreadCount(int producerSchedulerThreadCount) {
this.producerSchedulerThreadCount = producerSchedulerThreadCount;
}
private interface Checker {
void check(Channel ch) throws IOException;
}
private static boolean exists(Connection connection, Checker checker) throws IOException {
try {
Channel ch = connection.createChannel();
checker.check(ch);
ch.abort();
return true;
}
catch (IOException e) {
ShutdownSignalException sse = (ShutdownSignalException) e.getCause();
if (!sse.isHardError()) {
AMQP.Channel.Close closeMethod = (AMQP.Channel.Close) sse.getReason();
if (closeMethod.getReplyCode() == AMQP.NOT_FOUND) {
return false;
}
}
throw e;
}
}
/**
* Contract to handle the creation and configuration of resources.
* E.g. creation of queues, binding exchange to queues.
*/
interface TopologyHandler {
/**
* Get the current routing key
* @return
*/
String getRoutingKey();
/**
* Configure the queues for the current client (e.g. consumer or producer)
* @param connection
* @return the configured queues names (can be server-generated names), connection, and topology recording
* @throws IOException
*/
TopologyHandlerResult configureQueuesForClient(Connection connection) throws IOException;
/**
* Configure all the queues for this run
* @param connection
* @return the configured queues names (can be server-generated names), connection, and topology recording
* @throws IOException
*/
TopologyHandlerResult configureAllQueues(Connection connection) throws IOException;
/**
* Move the cursor forward.
* Should be called when the configuration (queues and routing key)
* is required for the next client (consumer or producer).
*/
void next();
/**
* Reset the {@link TopologyHandler}.
* Typically reset the cursor. To call e.g. when a new set of
* clients need to configured.
*/
void reset();
}
static class TopologyHandlerResult {
/**
* The connection to use to work against the configured resources.
* Useful when using exclusive resources.
*/
final Connection connection;
final TopologyRecording topologyRecording;
/**
* The configured queues.
*/
final List configuredQueues;
TopologyHandlerResult(Connection connection, List configuredQueues, TopologyRecording topologyRecording) {
this.connection = connection;
this.configuredQueues = configuredQueues;
this.topologyRecording = topologyRecording;
}
}
/**
* Support class that contains queue configuration.
*/
static abstract class TopologyHandlerSupport {
protected final MulticastParams params;
private final ConcurrentMap connectionCache = new ConcurrentHashMap<>();
protected TopologyHandlerSupport(MulticastParams params) {
this.params = params;
}
protected Connection maybeUseCachedConnection(List queues, Connection connection) throws IOException {
// if queues are exclusive, we create them for each consumer connection or re-use them
// in case they are more consumers than queues
Connection connectionToUse = connectionCache.putIfAbsent(queues.toString(), connection);
if (connectionToUse == null) {
// not a hit in the cache, we use the one passed-in
connectionToUse = connection;
} else {
// hit in the cache, we used the cached one, and close the passed-in one
// (unless the cache one and the passed-in one are the same object, which is the case
// when using several channels for each consumer!)
if (connection != connectionToUse) {
connection.close(AMQP.REPLY_SUCCESS, "Connection not used", -1);
}
}
return connectionToUse;
}
protected List configureQueues(Connection connection, List queues, TopologyRecording topologyRecording, Runnable afterQueueConfigurationCallback) throws IOException {
try (Channel channel = connection.createChannel()) {
if (!params.predeclared || !exchangeExists(connection, params.exchangeName)) {
channel.exchangeDeclare(params.exchangeName, params.exchangeType);
topologyRecording.recordExchange(params.exchangeName, params.exchangeType);
}
// To ensure we get at-least 1 default queue:
// (don't declare any queues when --predeclared is passed,
// otherwise unwanted server-named queues without consumers will pile up.
// see https://github.com/rabbitmq/rabbitmq-perf-test/issues/25 and
// https://github.com/rabbitmq/rabbitmq-perf-test/issues/43)
if (!params.predeclared && queues.isEmpty()) {
queues = Collections.singletonList("");
}
List generatedQueueNames = new ArrayList<>();
for (String qName : queues) {
if (!params.predeclared || !queueExists(connection, qName)) {
boolean serverNamed = qName == null || "".equals(qName);
qName = channel.queueDeclare(qName,
params.flags.contains("persistent"),
params.isExclusive(),
params.autoDelete,
params.queueArguments).getQueue();
topologyRecording.recordQueue(
qName, params.flags.contains("persistent"),
params.isExclusive(), params.autoDelete,
params.queueArguments, serverNamed
);
}
generatedQueueNames.add(qName);
// skipping binding to default exchange,
// as it's not possible to explicitly bind to it.
if (!"".equals(params.exchangeName) && !"amq.default".equals(params.exchangeName) && !params.skipBindingQueues) {
String routingKey = params.topologyHandler.getRoutingKey();
channel.queueBind(qName, params.exchangeName, routingKey);
topologyRecording.recordBinding(qName, params.exchangeName, routingKey);
}
afterQueueConfigurationCallback.run();
}
return generatedQueueNames;
} catch (TimeoutException e) {
throw new IOException(e);
}
}
}
/**
* {@link TopologyHandler} implementation that contains a list of a queues and a fixed routing key.
*/
static class FixedQueuesTopologyHandler extends TopologyHandlerSupport implements TopologyHandler {
final String routingKey;
final List queueNames;
final TopologyRecording topologyRecording;
FixedQueuesTopologyHandler(MulticastParams params, String routingKey, List queueNames, TopologyRecording topologyRecording) {
super(params);
if (routingKey == null) {
this.routingKey = UUID.randomUUID().toString();
} else {
this.routingKey = routingKey;
}
this.queueNames = queueNames == null ? new ArrayList<>() : queueNames;
this.topologyRecording = topologyRecording;
}
@Override
public String getRoutingKey() {
return routingKey;
}
@Override
public TopologyHandlerResult configureQueuesForClient(Connection connection) throws IOException {
if (this.params.isExclusive()) {
Connection connectionToUse = maybeUseCachedConnection(this.queueNames, connection);
return new TopologyHandlerResult(
connectionToUse, configureQueues(connectionToUse, this.queueNames, topologyRecording, () -> {}), topologyRecording
);
} else {
return new TopologyHandlerResult(
connection, configureQueues(connection, this.queueNames, topologyRecording, () -> {}), topologyRecording
);
}
}
@Override
public TopologyHandlerResult configureAllQueues(Connection connection) throws IOException {
if (shouldConfigureQueues() && !this.params.isExclusive()) {
return new TopologyHandlerResult(connection, configureQueues(connection, this.queueNames, topologyRecording, () -> {}), topologyRecording);
}
return new TopologyHandlerResult(connection, new ArrayList<>(), this.topologyRecording.child());
}
public boolean shouldConfigureQueues() {
// if no consumer, no queue has been configured and
// some queues are specified, we have to configure the queues and their bindings
return this.params.consumerCount == 0 && !(queueNames.size() == 0);
}
@Override
public void next() {
// NO OP
}
@Override
public void reset() {
// NO OP
}
}
/**
* {@link TopologyHandler} meant to use a sequence of queues and routing keys.
* E.g. perf-test-1, perf-test-2, etc.
* The routing key has the same value as the current queue.
*/
static class SequenceTopologyHandler extends TopologyHandlerSupport implements TopologyHandler {
final List queues;
int index = 0;
private final TopologyRecording topologyRecording;
public SequenceTopologyHandler(MulticastParams params, int from, int to, String queuePattern, TopologyRecording topologyRecording) {
super(params);
queues = new ArrayList<>(to - from + 1);
for (int i = from; i <= to; i++) {
queues.add(String.format(queuePattern, i));
}
this.topologyRecording = topologyRecording;
}
@Override
public String getRoutingKey() {
return this.getQueueNamesForClient().get(0);
}
@Override
public TopologyHandlerResult configureQueuesForClient(Connection connection) throws IOException {
if (this.params.isExclusive()) {
Connection connectionToUse = maybeUseCachedConnection(getQueueNamesForClient(), connection);
TopologyRecording clientTopologyRecording = this.topologyRecording.child();
return new TopologyHandlerResult(
connectionToUse,
configureQueues(connectionToUse, getQueueNamesForClient(), clientTopologyRecording, () -> {}),
clientTopologyRecording
);
} else {
List queues = getQueueNamesForClient();
TopologyRecording clientTopologyRecording = this.topologyRecording.subRecording(queues);
return new TopologyHandlerResult(
connection,
getQueueNamesForClient(),
clientTopologyRecording
);
}
}
@Override
public TopologyHandlerResult configureAllQueues(Connection connection) throws IOException {
// if queues are exclusive, we'll create them for each consumer connection
if (this.params.isExclusive()) {
return new TopologyHandlerResult(connection, new ArrayList<>(), this.topologyRecording.child());
} else {
return new TopologyHandlerResult(connection, configureQueues(connection, getQueueNames(), this.topologyRecording, () -> this.next()), this.topologyRecording);
}
}
protected List getQueueNames() {
return Collections.unmodifiableList(queues);
}
protected List getQueueNamesForClient() {
return Collections.singletonList(queues.get(index % queues.size()));
}
@Override
public void next() {
index++;
}
@Override
public void reset() {
index = 0;
}
}
}
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