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ARTEMIS-2423 Improving Consumer/Queue Delivery lock

This commit is contained in:
Clebert Suconic 2019-07-25 12:10:24 -04:00
parent d2d21516ba
commit 7507a9fd4b
18 changed files with 282 additions and 296 deletions
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10
artemis-protocols/artemis-amqp-protocol/src/main/java/org/apache/activemq/artemis/protocol/amqp/broker/AMQPSessionCallback.java
View File

@ -186,11 +186,6 @@ public class AMQPSessionCallback implements SessionCallback {
(String) null, this, true, operationContext, manager.getPrefixes());
}
@Override
public void afterDelivery() throws Exception {
}
public void start() {
}
@ -604,6 +599,11 @@ public class AMQPSessionCallback implements SessionCallback {
}
@Override
public void afterDeliver(MessageReference ref, Message message, ServerConsumer consumerID, int deliveryCount) {
}
@Override
public int sendLargeMessage(MessageReference ref,
Message message,

24
artemis-protocols/artemis-mqtt-protocol/src/main/java/org/apache/activemq/artemis/core/protocol/mqtt/MQTTPublishManager.java
View File

@ -59,6 +59,12 @@ public class MQTTPublishManager {
private MQTTSessionState.OutboundStore outboundStore;
/** this is the last qos that happened during delivery.
* since afterDelivery will happen in the same thread, no other threads should be calling delivery and afterDelivery
* so it is safe to keep this value here.
*/
private Integer currentQos;
public MQTTPublishManager(MQTTSession session) {
this.session = session;
}
@ -108,7 +114,6 @@ public class MQTTPublishManager {
boolean isManagementConsumer(ServerConsumer consumer) {
return consumer == managementConsumer;
}
/**
* Since MQTT Subscriptions can over lap; a client may receive the same message twice. When this happens the client
* returns a PubRec or PubAck with ID. But we need to know which consumer to ack, since we only have the ID to go on we
@ -119,20 +124,35 @@ public class MQTTPublishManager {
protected void sendMessage(ICoreMessage message, ServerConsumer consumer, int deliveryCount) throws Exception {
// This is to allow retries of PubRel.
if (isManagementConsumer(consumer)) {
currentQos = null;
sendPubRelMessage(message);
} else {
int qos = decideQoS(message, consumer);
currentQos = qos;
if (qos == 0) {
sendServerMessage((int) message.getMessageID(), message, deliveryCount, qos);
session.getServerSession().individualAcknowledge(consumer.getID(), message.getMessageID());
} else if (qos == 1 || qos == 2) {
int mqttid = outboundStore.generateMqttId(message.getMessageID(), consumer.getID());
outboundStore.publish(mqttid, message.getMessageID(), consumer.getID());
sendServerMessage(mqttid, message, deliveryCount, qos);
} else {
// this will happen during afterDeliver
}
}
}
protected void confirmMessage(ICoreMessage message, ServerConsumer consumer, int deliveryCount) throws Exception {
if (currentQos != null) {
int qos = currentQos.intValue();
if (qos == 0) {
session.getServerSession().individualAcknowledge(consumer.getID(), message.getMessageID());
} else if (qos == 1 || qos == 2) {
// everything happened in delivery
} else {
// Client must have disconnected and it's Subscription QoS cleared
consumer.individualCancel(message.getMessageID(), false);
}
}
}

14
artemis-protocols/artemis-mqtt-protocol/src/main/java/org/apache/activemq/artemis/core/protocol/mqtt/MQTTSessionCallback.java
View File

@ -59,6 +59,15 @@ public class MQTTSessionCallback implements SessionCallback {
return 1;
}
@Override
public void afterDeliver(MessageReference ref, Message message, ServerConsumer consumer, int deliveryCount) {
try {
session.getMqttPublishManager().confirmMessage(message.toCore(), consumer, deliveryCount);
} catch (Exception e) {
log.warn("Unable to send message: " + message.getMessageID() + " Cause: " + e.getMessage(), e);
}
}
@Override
public boolean updateDeliveryCountAfterCancel(ServerConsumer consumer, MessageReference ref, boolean failed) {
return false;
@ -90,11 +99,6 @@ public class MQTTSessionCallback implements SessionCallback {
}
}
@Override
public void afterDelivery() throws Exception {
}
@Override
public void browserFinished(ServerConsumer consumer) {

14
artemis-protocols/artemis-openwire-protocol/src/main/java/org/apache/activemq/artemis/core/protocol/openwire/amq/AMQSession.java
View File

@ -270,12 +270,6 @@ public class AMQSession implements SessionCallback {
}
// rename actualDest to destination
@Override
public void afterDelivery() throws Exception {
}
@Override
public void browserFinished(ServerConsumer consumer) {
AMQConsumer theConsumer = (AMQConsumer) consumer.getProtocolData();
@ -312,6 +306,14 @@ public class AMQSession implements SessionCallback {
return theConsumer.handleDeliver(reference, message.toCore(), deliveryCount);
}
@Override
public void afterDeliver(MessageReference ref,
org.apache.activemq.artemis.api.core.Message message,
ServerConsumer consumerID,
int deliveryCount) {
}
@Override
public int sendLargeMessage(MessageReference reference,
org.apache.activemq.artemis.api.core.Message message,

3
artemis-protocols/artemis-stomp-protocol/src/main/java/org/apache/activemq/artemis/core/protocol/stomp/StompSession.java
View File

@ -110,8 +110,9 @@ public class StompSession implements SessionCallback {
public void sendProducerCreditsFailMessage(int credits, SimpleString address) {
}
@Override
public void afterDelivery() throws Exception {
public void afterDeliver(MessageReference ref, Message message, ServerConsumer consumerID, int deliveryCount) throws Exception {
PendingTask task;
while ((task = afterDeliveryTasks.poll()) != null) {
task.run();

10
artemis-server/src/main/java/org/apache/activemq/artemis/core/management/impl/ManagementRemotingConnection.java
View File

@ -211,11 +211,6 @@ public class ManagementRemotingConnection implements RemotingConnection {
return false;
}
@Override
public void afterDelivery() throws Exception {
}
@Override
public boolean updateDeliveryCountAfterCancel(ServerConsumer consumer, MessageReference ref, boolean failed) {
return false;
@ -236,6 +231,11 @@ public class ManagementRemotingConnection implements RemotingConnection {
return 0;
}
@Override
public void afterDeliver(MessageReference ref, Message message, ServerConsumer consumerID, int deliveryCount) {
}
@Override
public int sendLargeMessage(MessageReference reference,
Message message,

10
artemis-server/src/main/java/org/apache/activemq/artemis/core/protocol/core/impl/CoreSessionCallback.java
View File

@ -132,6 +132,11 @@ public final class CoreSessionCallback implements SessionCallback {
return size;
}
@Override
public void afterDeliver(MessageReference ref, Message message, ServerConsumer consumerID, int deliveryCount) {
// no op
}
@Override
public void sendProducerCreditsMessage(int credits, SimpleString address) {
Packet packet = new SessionProducerCreditsMessage(credits, address);
@ -144,11 +149,6 @@ public final class CoreSessionCallback implements SessionCallback {
}
@Override
public void afterDelivery() throws Exception {
}
@Override
public void sendProducerCreditsFailMessage(int credits, SimpleString address) {
Packet packet = new SessionProducerCreditsFailMessage(credits, address);

32
artemis-server/src/main/java/org/apache/activemq/artemis/core/server/Consumer.java
View File

@ -25,6 +25,10 @@ import org.apache.activemq.artemis.spi.core.protocol.SessionCallback;
public interface Consumer extends PriorityAware {
interface GroupHandler {
MessageReference handleMessageGroup(MessageReference ref, Consumer consumer, boolean newGroup);
}
/**
*
* @see SessionCallback#supportsDirectDelivery()
@ -34,13 +38,7 @@ public interface Consumer extends PriorityAware {
}
/**
* There was a change on semantic during 2.3 here.<br>
* We now first accept the message, and the actual deliver is done as part of
* {@link #proceedDeliver(MessageReference)}. This is to avoid holding a lock on the queues while
* the delivery is being accomplished To avoid a lock on the queue in case of misbehaving
* consumers.
* <p>
* This should return busy if handle is called before proceed deliver is called
*
* @param reference
* @return
@ -48,19 +46,29 @@ public interface Consumer extends PriorityAware {
*/
HandleStatus handle(MessageReference reference) throws Exception;
/**
* This will return {@link HandleStatus#BUSY} if busy, {@link HandleStatus#NO_MATCH} if no match, or the MessageReference is handled
* This should return busy if handle is called before proceed deliver is called
* @param groupHandler
* @param reference
* @return
* @throws Exception
*/
default Object handleWithGroup(GroupHandler groupHandler, boolean newGroup, MessageReference reference) throws Exception {
return handle(reference);
}
/** wakes up internal threads to deliver more messages */
default void promptDelivery() {
}
/**
* This will proceed with the actual delivery.
* Notice that handle should hold a readLock and proceedDelivery should release the readLock
* any lock operation on Consumer should also get a writeLock on the readWriteLock
* to guarantee there are no pending deliveries
* This will called after delivery
* Giving protocols a chance to complete their deliveries doing things such as individualACK outside of main locks
*
* @throws Exception
*/
void proceedDeliver(MessageReference reference) throws Exception;
void afterDeliver(MessageReference reference) throws Exception;
Filter getFilter();

2
artemis-server/src/main/java/org/apache/activemq/artemis/core/server/cluster/impl/BridgeImpl.java
View File

@ -689,7 +689,7 @@ public class BridgeImpl implements Bridge, SessionFailureListener, SendAcknowled
// FailureListener implementation --------------------------------
@Override
public void proceedDeliver(MessageReference ref) {
public void afterDeliver(MessageReference ref) {
// no op
}

2
artemis-server/src/main/java/org/apache/activemq/artemis/core/server/cluster/impl/Redistributor.java
View File

@ -193,7 +193,7 @@ public class Redistributor implements Consumer {
}
@Override
public void proceedDeliver(MessageReference ref) {
public void afterDeliver(MessageReference ref) {
// no op
}

110
artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/QueueImpl.java
View File

@ -98,7 +98,6 @@ import org.apache.activemq.artemis.spi.core.protocol.RemotingConnection;
import org.apache.activemq.artemis.utils.BooleanUtil;
import org.apache.activemq.artemis.utils.Env;
import org.apache.activemq.artemis.utils.ReferenceCounter;
import org.apache.activemq.artemis.utils.ReusableLatch;
import org.apache.activemq.artemis.utils.actors.ArtemisExecutor;
import org.apache.activemq.artemis.utils.collections.LinkedListIterator;
import org.apache.activemq.artemis.utils.collections.PriorityLinkedList;
@ -114,7 +113,7 @@ import org.jboss.logging.Logger;
* <p>
* Completely non blocking between adding to queue and delivering to consumers.
*/
public class QueueImpl extends CriticalComponentImpl implements Queue {
public class QueueImpl extends CriticalComponentImpl implements Queue, Consumer.GroupHandler {
protected static final int CRITICAL_PATHS = 5;
protected static final int CRITICAL_PATH_ADD_TAIL = 0;
@ -268,8 +267,6 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
private final ExpiryScanner expiryScanner = new ExpiryScanner();
private final ReusableLatch deliveriesInTransit = new ReusableLatch(0);
private final AtomicLong queueRateCheckTime = new AtomicLong(System.currentTimeMillis());
private final AtomicLong messagesAddedSnapshot = new AtomicLong(0);
@ -955,7 +952,7 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
// directDeliver flag to be re-computed resulting in direct delivery if the queue is empty
// We don't recompute it on every delivery since executing isEmpty is expensive for a ConcurrentQueue
if (deliveriesInTransit.getCount() == 0 && getExecutor().isFlushed() &&
if (getExecutor().isFlushed() &&
intermediateMessageReferences.isEmpty() && messageReferences.isEmpty() &&
pageIterator != null && !pageIterator.hasNext() &&
pageSubscription != null && !pageSubscription.isPaging()) {
@ -974,7 +971,7 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
}
}
if (direct && supportsDirectDeliver && directDeliver && deliveriesInTransit.getCount() == 0 && deliverDirect(ref)) {
if (direct && supportsDirectDeliver && directDeliver && deliverDirect(ref)) {
return;
}
@ -1005,23 +1002,6 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
return false;
}
/**
* This will wait for any pending deliveries to finish
*/
private boolean flushDeliveriesInTransit() {
try {
if (deliveriesInTransit.await(DELIVERY_TIMEOUT)) {
return true;
} else {
ActiveMQServerLogger.LOGGER.timeoutFlushInTransit(getName().toString(), getAddress().toString());
return false;
}
} catch (Exception e) {
ActiveMQServerLogger.LOGGER.unableToFlushDeliveries(e);
return false;
}
}
@Override
public void forceDelivery() {
if (pageSubscription != null && pageSubscription.isPaging()) {
@ -2366,7 +2346,6 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
@Override
public synchronized void pause(boolean persist) {
try {
this.flushDeliveriesInTransit();
if (persist && isDurable()) {
if (pauseStatusRecord >= 0) {
storageManager.deleteQueueStatus(pauseStatusRecord);
@ -2607,7 +2586,16 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
consumer = groupConsumer;
}
HandleStatus status = handle(ref, consumer);
Object handleValue = handle(ref, consumer, groupConsumer == null);
HandleStatus status;
if (handleValue instanceof MessageReference) {
ref = (MessageReference) handleValue;
status = HandleStatus.HANDLED;
} else {
status = (HandleStatus) handleValue;
}
if (status == HandleStatus.HANDLED) {
@ -2615,13 +2603,6 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
// this is to avoid breaks on the loop when checking for any other factors.
noDelivery = 0;
if (redistributor == null) {
ref = handleMessageGroup(ref, consumer, groupConsumer, groupID);
}
deliveriesInTransit.countUp();
removeMessageReference(holder, ref);
handledconsumer = consumer;
handled++;
@ -2653,16 +2634,10 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
// Round robin'd all
if (noDelivery == this.consumers.size()) {
if (handledconsumer != null) {
// this shouldn't really happen,
// however I'm keeping this as an assertion case future developers ever change the logic here on this class
ActiveMQServerLogger.LOGGER.nonDeliveryHandled();
} else {
if (logger.isDebugEnabled()) {
logger.debug(this + "::All the consumers were busy, giving up now");
}
break;
if (logger.isDebugEnabled()) {
logger.debug(this + "::All the consumers were busy, giving up now");
}
break;
}
noDelivery = 0;
@ -2670,7 +2645,7 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
}
if (handledconsumer != null) {
proceedDeliver(handledconsumer, ref);
afterDeliver(handledconsumer, ref);
}
}
@ -3198,7 +3173,7 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
}
}
private boolean deliver(final MessageReference ref) {
private boolean deliver(MessageReference ref) {
synchronized (this) {
if (!supportsDirectDeliver) {
return false;
@ -3225,20 +3200,24 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
consumer = groupConsumer;
}
HandleStatus status = handle(ref, consumer);
Object handleValue = handle(ref, consumer, groupConsumer == null);
HandleStatus status;
final MessageReference reference;
if (handleValue instanceof MessageReference) {
reference = (MessageReference) handleValue;
status = HandleStatus.HANDLED;
} else {
reference = ref;
status = (HandleStatus) handleValue;
}
if (status == HandleStatus.HANDLED) {
final MessageReference reference;
if (redistributor == null) {
reference = handleMessageGroup(ref, consumer, groupConsumer, groupID);
} else {
reference = ref;
}
messagesAdded.incrementAndGet();
deliveriesInTransit.countUp();
proceedDeliver(consumer, reference);
consumers.reset();
return true;
}
@ -3269,9 +3248,16 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
return groupConsumer;
}
private MessageReference handleMessageGroup(MessageReference ref, Consumer consumer, Consumer groupConsumer, SimpleString groupID) {
/** This is {@link Consumer.GroupHandler#handleMessageGroup(MessageReference, Consumer, boolean)} */
@Override
public MessageReference handleMessageGroup(MessageReference ref, Consumer consumer, boolean newGroup) {
if (redistributor != null) {
// no grouping work on this case
return ref;
}
SimpleString groupID = extractGroupID(ref);
if (exclusive) {
if (groupConsumer == null) {
if (newGroup) {
exclusiveConsumer = consumer;
if (groupFirstKey != null) {
return new GroupFirstMessageReference(groupFirstKey, ref);
@ -3282,7 +3268,7 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
if (extractGroupSequence(ref) == -1) {
groups.remove(groupID);
consumers.repeat();
} else if (groupConsumer == null) {
} else if (newGroup) {
groups.put(groupID, consumer);
if (groupFirstKey != null) {
return new GroupFirstMessageReference(groupFirstKey, ref);
@ -3294,13 +3280,11 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
return ref;
}
private void proceedDeliver(Consumer consumer, MessageReference reference) {
private void afterDeliver(Consumer consumer, MessageReference reference) {
try {
consumer.proceedDeliver(reference);
consumer.afterDeliver(reference);
} catch (Throwable t) {
errorProcessing(consumer, t, reference);
} finally {
deliveriesInTransit.countDown();
}
}
@ -3345,10 +3329,10 @@ public class QueueImpl extends CriticalComponentImpl implements Queue {
}
}
private synchronized HandleStatus handle(final MessageReference reference, final Consumer consumer) {
HandleStatus status;
private synchronized Object handle(final MessageReference reference, final Consumer consumer, boolean newGroup) {
Object status;
try {
status = consumer.handle(reference);
status = consumer.handleWithGroup(this, newGroup, reference);
} catch (Throwable t) {
ActiveMQServerLogger.LOGGER.removingBadConsumer(t, consumer, reference);

305
artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/ServerConsumerImpl.java
View File

@ -24,11 +24,8 @@ import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.apache.activemq.artemis.api.config.ActiveMQDefaultConfiguration;
import org.apache.activemq.artemis.api.core.ActiveMQException;
@ -107,13 +104,6 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
private SlowConsumerDetectionListener slowConsumerListener;
/**
* We get a readLock when a message is handled, and return the readLock when the message is finally delivered
* When stopping the consumer we need to get a writeLock to make sure we had all delivery finished
* otherwise a rollback may get message sneaking in
*/
private final ReadWriteLock lockDelivery = new ReentrantReadWriteLock();
private volatile AtomicInteger availableCredits = new AtomicInteger(0);
private boolean started;
@ -392,8 +382,20 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
messageQueue.errorProcessing(this, e, deliveryObject);
}
/** This is in case someone is using direct old API */
@Override
public HandleStatus handle(final MessageReference ref) throws Exception {
public HandleStatus handle(MessageReference ref) throws Exception {
Object refReturn = handleWithGroup(null, false, ref);
if (refReturn instanceof MessageReference) {
return HandleStatus.HANDLED;
} else {
return (HandleStatus) refReturn;
}
}
@Override
public Object handleWithGroup(GroupHandler handler, boolean newGroup, final MessageReference ref) throws Exception {
// available credits can be set back to null with a flow control option.
AtomicInteger checkInteger = availableCredits;
if (callback != null && !callback.hasCredits(this) || checkInteger != null && checkInteger.get() <= 0) {
@ -481,42 +483,46 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
}
lockDelivery.readLock().lock();
MessageReference deliveryReference = ref;
if (handler != null) {
deliveryReference = handler.handleMessageGroup(ref, this, newGroup);
}
proceedDeliver(deliveryReference);
return HandleStatus.HANDLED;
}
}
@Override
public void proceedDeliver(MessageReference reference) throws Exception {
try {
Message message = reference.getMessage();
private void proceedDeliver(MessageReference reference) throws Exception {
Message message = reference.getMessage();
if (server.hasBrokerMessagePlugins()) {
server.callBrokerMessagePlugins(plugin -> plugin.beforeDeliver(this, reference));
}
if (message.isLargeMessage() && supportLargeMessage) {
if (largeMessageDeliverer == null) {
// This can't really happen as handle had already crated the deliverer
// instead of throwing an exception in weird cases there is no problem on just go ahead and create it
// again here
largeMessageDeliverer = new LargeMessageDeliverer((LargeServerMessage) message, reference);
}
// The deliverer was prepared during handle, as we can't have more than one pending large message
// as it would return busy if there is anything pending
largeMessageDeliverer.deliver();
} else {
deliverStandardMessage(reference, message);
}
} finally {
lockDelivery.readLock().unlock();
callback.afterDelivery();
if (server.hasBrokerMessagePlugins()) {
server.callBrokerMessagePlugins(plugin -> plugin.afterDeliver(this, reference));
}
if (server.hasBrokerMessagePlugins()) {
server.callBrokerMessagePlugins(plugin -> plugin.beforeDeliver(this, reference));
}
if (message.isLargeMessage() && supportLargeMessage) {
if (largeMessageDeliverer == null) {
// This can't really happen as handle had already crated the deliverer
// instead of throwing an exception in weird cases there is no problem on just go ahead and create it
// again here
largeMessageDeliverer = new LargeMessageDeliverer((LargeServerMessage) message, reference);
}
// The deliverer was prepared during handle, as we can't have more than one pending large message
// as it would return busy if there is anything pending
largeMessageDeliverer.deliver();
} else {
deliverStandardMessage(reference, message);
}
}
@Override
public void afterDeliver(MessageReference reference) throws Exception {
callback.afterDeliver(reference, reference.getMessage(), ServerConsumerImpl.this, reference.getDeliveryCount());
if (server.hasBrokerMessagePlugins()) {
server.callBrokerMessagePlugins(plugin -> plugin.afterDeliver(this, reference));
}
}
@Override
@ -626,7 +632,7 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
* there are no other messages to be delivered.
*/
@Override
public void forceDelivery(final long sequence) {
public void forceDelivery(final long sequence) {
forceDelivery(sequence, () -> {
Message forcedDeliveryMessage = new CoreMessage(storageManager.generateID(), 50);
MessageReference reference = MessageReference.Factory.createReference(forcedDeliveryMessage, messageQueue);
@ -730,19 +736,7 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
@Override
public void setStarted(final boolean started) {
synchronized (lock) {
boolean locked = lockDelivery();
// This is to make sure nothing would sneak to the client while started = false
// the client will stop the session and perform a rollback in certain cases.
// in case something sneaks to the client you could get to messaging delivering forever until
// you restart the server
try {
this.started = browseOnly || started;
} finally {
if (locked) {
lockDelivery.writeLock().unlock();
}
}
this.started = browseOnly || started;
}
// Outside the lock
@ -751,35 +745,10 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
}
}
private boolean lockDelivery() {
try {
if (!lockDelivery.writeLock().tryLock(30, TimeUnit.SECONDS)) {
ActiveMQServerLogger.LOGGER.timeoutLockingConsumer();
if (server != null) {
server.threadDump();
}
return false;
}
return true;
} catch (Exception e) {
ActiveMQServerLogger.LOGGER.failedToFinishDelivery(e);
return false;
}
}
@Override
public void setTransferring(final boolean transferring) {
synchronized (lock) {
// This is to make sure that the delivery process has finished any pending delivery
// otherwise a message may sneak in on the client while we are trying to stop the consumer
boolean locked = lockDelivery();
try {
this.transferring = transferring;
} finally {
if (locked) {
lockDelivery.writeLock().unlock();
}
}
this.transferring = transferring;
}
// Outside the lock
@ -1275,125 +1244,111 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
}
public boolean deliver() throws Exception {
lockDelivery.readLock().lock();
try {
if (!started) {
return false;
if (!started) {
return false;
}
LargeServerMessage currentLargeMessage = largeMessage;
if (currentLargeMessage == null) {
return true;
}
if (availableCredits != null && availableCredits.get() <= 0) {
if (logger.isTraceEnabled()) {
logger.trace(this + "::FlowControl::delivery largeMessage interrupting as there are no more credits, available=" + availableCredits);
}
releaseHeapBodyBuffer();
return false;
}
if (!sentInitialPacket) {
context = currentLargeMessage.getBodyEncoder();
sizePendingLargeMessage = context.getLargeBodySize();
context.open();
sentInitialPacket = true;
int packetSize = callback.sendLargeMessage(ref, currentLargeMessage, ServerConsumerImpl.this, context.getLargeBodySize(), ref.getDeliveryCount());
if (availableCredits != null) {
final int credits = availableCredits.addAndGet(-packetSize);
if (credits <= 0) {
releaseHeapBodyBuffer();
}
if (logger.isTraceEnabled()) {
logger.trace(this + "::FlowControl::" + " deliver initialpackage with " + packetSize + " delivered, available now = " + availableCredits);
}
}
LargeServerMessage currentLargeMessage = largeMessage;
if (currentLargeMessage == null) {
return true;
}
// Execute the rest of the large message on a different thread so as not to tie up the delivery thread
// for too long
resumeLargeMessage();
return false;
} else {
if (availableCredits != null && availableCredits.get() <= 0) {
if (logger.isTraceEnabled()) {
logger.trace(this + "::FlowControl::delivery largeMessage interrupting as there are no more credits, available=" +
availableCredits);
logger.trace(this + "::FlowControl::deliverLargeMessage Leaving loop of send LargeMessage because of credits, available=" + availableCredits);
}
releaseHeapBodyBuffer();
return false;
}
if (!sentInitialPacket) {
context = currentLargeMessage.getBodyEncoder();
final int localChunkLen = (int) Math.min(sizePendingLargeMessage - positionPendingLargeMessage, minLargeMessageSize);
sizePendingLargeMessage = context.getLargeBodySize();
final ByteBuffer bodyBuffer = acquireHeapBodyBuffer(localChunkLen);
context.open();
assert bodyBuffer.remaining() == localChunkLen;
sentInitialPacket = true;
final int readBytes = context.encode(bodyBuffer);
int packetSize = callback.sendLargeMessage(ref, currentLargeMessage, ServerConsumerImpl.this, context.getLargeBodySize(), ref.getDeliveryCount());
assert readBytes == localChunkLen;
if (availableCredits != null) {
final int credits = availableCredits.addAndGet(-packetSize);
final byte[] body = bodyBuffer.array();
if (credits <= 0) {
releaseHeapBodyBuffer();
}
assert body.length == readBytes;
if (logger.isTraceEnabled()) {
logger.trace(this + "::FlowControl::" +
" deliver initialpackage with " +
packetSize +
" delivered, available now = " +
availableCredits);
}
//It is possible to recycle the same heap body buffer because it won't be cached by sendLargeMessageContinuation
//given that requiresResponse is false: ChannelImpl::send will use the resend cache only if
//resendCache != null && packet.isRequiresConfirmations()
int packetSize = callback.sendLargeMessageContinuation(ServerConsumerImpl.this, body, positionPendingLargeMessage + localChunkLen < sizePendingLargeMessage, false);
int chunkLen = body.length;
if (availableCredits != null) {
final int credits = availableCredits.addAndGet(-packetSize);
if (credits <= 0) {
releaseHeapBodyBuffer();
}
// Execute the rest of the large message on a different thread so as not to tie up the delivery thread
// for too long
if (logger.isTraceEnabled()) {
logger.trace(this + "::FlowControl::largeMessage deliver continuation, packetSize=" + packetSize + " available now=" + availableCredits);
}
}
positionPendingLargeMessage += chunkLen;
if (positionPendingLargeMessage < sizePendingLargeMessage) {
resumeLargeMessage();
return false;
} else {
if (availableCredits != null && availableCredits.get() <= 0) {
if (logger.isTraceEnabled()) {
logger.trace(this + "::FlowControl::deliverLargeMessage Leaving loop of send LargeMessage because of credits, available=" +
availableCredits);
}
releaseHeapBodyBuffer();
return false;
}
final int localChunkLen = (int) Math.min(sizePendingLargeMessage - positionPendingLargeMessage, minLargeMessageSize);
final ByteBuffer bodyBuffer = acquireHeapBodyBuffer(localChunkLen);
assert bodyBuffer.remaining() == localChunkLen;
final int readBytes = context.encode(bodyBuffer);
assert readBytes == localChunkLen;
final byte[] body = bodyBuffer.array();
assert body.length == readBytes;
//It is possible to recycle the same heap body buffer because it won't be cached by sendLargeMessageContinuation
//given that requiresResponse is false: ChannelImpl::send will use the resend cache only if
//resendCache != null && packet.isRequiresConfirmations()
int packetSize = callback.sendLargeMessageContinuation(ServerConsumerImpl.this, body, positionPendingLargeMessage + localChunkLen < sizePendingLargeMessage, false);
int chunkLen = body.length;
if (availableCredits != null) {
final int credits = availableCredits.addAndGet(-packetSize);
if (credits <= 0) {
releaseHeapBodyBuffer();
}
if (logger.isTraceEnabled()) {
logger.trace(this + "::FlowControl::largeMessage deliver continuation, packetSize=" +
packetSize +
" available now=" +
availableCredits);
}
}
positionPendingLargeMessage += chunkLen;
if (positionPendingLargeMessage < sizePendingLargeMessage) {
resumeLargeMessage();
return false;
}
}
if (logger.isTraceEnabled()) {
logger.trace("Finished deliverLargeMessage");
}
finish();
return true;
} finally {
lockDelivery.readLock().unlock();
}
if (logger.isTraceEnabled()) {
logger.trace("Finished deliverLargeMessage");
}
finish();
return true;
}
public void finish() throws Exception {
@ -1453,7 +1408,7 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
}
if (status == HandleStatus.HANDLED) {
proceedDeliver(current);
afterDeliver(current);
}
current = null;
@ -1481,7 +1436,7 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
}
if (status == HandleStatus.HANDLED) {
proceedDeliver(ref);
afterDeliver(ref);
} else if (status == HandleStatus.BUSY) {
// keep a reference on the current message reference
// to handle it next time the browser deliverer is executed

10
artemis-server/src/main/java/org/apache/activemq/artemis/spi/core/protocol/SessionCallback.java
View File

@ -41,11 +41,10 @@ public interface SessionCallback {
*/
boolean hasCredits(ServerConsumer consumerID);
/**
* This can be used to complete certain operations outside of the lock,
* like acks or other operations.
*/
void afterDelivery() throws Exception;
// Certain protocols (MQTT) will need to confirm messages doing things such as individualACKS
// and these need to be done outside of the main lock.
// otherwise we could dead-lock during delivery
void afterDeliver(MessageReference ref, Message message, ServerConsumer consumerID, int deliveryCount) throws Exception;
/**
* Use this to updates specifics on the message after a redelivery happened.
@ -69,6 +68,7 @@ public interface SessionCallback {
// Future developments may change this, but beware why I have chosen to keep the parameter separated here
int sendMessage(MessageReference ref, Message message, ServerConsumer consumerID, int deliveryCount);
int sendLargeMessage(MessageReference reference,
Message message,
ServerConsumer consumerID,

2
tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/cli/DummyServerConsumer.java
View File

@ -190,7 +190,7 @@ public class DummyServerConsumer implements ServerConsumer {
}
@Override
public void proceedDeliver(MessageReference reference) throws Exception {
public void afterDeliver(MessageReference reference) throws Exception {
}

10
tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/client/HangConsumerTest.java
View File

@ -527,11 +527,6 @@ public class HangConsumerTest extends ActiveMQTestBase {
return true;
}
@Override
public void afterDelivery() throws Exception {
}
@Override
public void sendProducerCreditsFailMessage(int credits, SimpleString address) {
targetCallback.sendProducerCreditsFailMessage(credits, address);
@ -558,6 +553,11 @@ public class HangConsumerTest extends ActiveMQTestBase {
}
}
@Override
public void afterDeliver(MessageReference ref, Message message, ServerConsumer consumerID, int deliveryCount) {
}
/* (non-Javadoc)
* @see SessionCallback#sendLargeMessage(org.apache.activemq.artemis.core.server.ServerMessage, long, long, int)
*/

1
tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/jms/client/GroupingTest.java
View File

@ -271,7 +271,6 @@ public class GroupingTest extends JMSTestBase {
assertEquals(tm.getStringProperty("JMSXGroupID"), jmsxgroupID);
}
Thread.sleep(2000);
//session.rollback();
//session.close();
//consume all msgs from 2nd first consumer

17
tests/unit-tests/src/test/java/org/apache/activemq/artemis/tests/unit/core/server/impl/QueueImplTest.java
View File

@ -1312,12 +1312,21 @@ public class QueueImplTest extends ActiveMQTestBase {
@Override
public synchronized HandleStatus handle(MessageReference reference) {
return HandleStatus.HANDLED;
}
@Override
public Object handleWithGroup(GroupHandler groupHandler, boolean newGroup, MessageReference reference) throws Exception {
if (count == 0) {
//the first message is handled and will be used to determine this consumer
//to be the group consumer
count++;
firstMessageHandled.countDown();
return HandleStatus.HANDLED;
if (groupHandler != null) {
return groupHandler.handleMessageGroup(reference, this, newGroup);
} else {
return HandleStatus.HANDLED;
}
} else if (count <= 2) {
//the next two attempts to send the second message will be done
//attempting a direct delivery and an async one after that
@ -1329,7 +1338,11 @@ public class QueueImplTest extends ActiveMQTestBase {
//the second message should have stop the delivery loop:
//it will succeed just to let the message being handled and
//reduce the message count to 0
return HandleStatus.HANDLED;
if (groupHandler != null) {
return groupHandler.handleMessageGroup(reference, this, newGroup);
} else {
return HandleStatus.HANDLED;
}
}
}
};

2
tests/unit-tests/src/test/java/org/apache/activemq/artemis/tests/unit/core/server/impl/fakes/FakeConsumer.java
View File

@ -138,7 +138,7 @@ public class FakeConsumer implements Consumer {
}
@Override
public void proceedDeliver(MessageReference ref) throws Exception {
public void afterDeliver(MessageReference ref) throws Exception {
// no op
}