Add non-blocking send

This commit is contained in:
Florian Schmaus 2022-06-02 15:55:24 +02:00
parent 711d7d92bd
commit c77948bb91
9 changed files with 237 additions and 101 deletions

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@ -29,17 +29,19 @@ import org.jivesoftware.smack.AbstractXMPPConnection;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.SmackException.GenericConnectionException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.SmackException.OutgoingQueueFullException;
import org.jivesoftware.smack.SmackException.SmackWrappedException;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.XMPPException.StreamErrorException;
import org.jivesoftware.smack.packet.Element;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Nonza;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.packet.StanzaError;
import org.jivesoftware.smack.packet.TopLevelStreamElement;
import org.jivesoftware.smack.util.ArrayBlockingQueueWithShutdown;
import org.jivesoftware.smack.util.Async;
import org.jivesoftware.smack.util.CloseableUtil;
import org.jivesoftware.smack.util.PacketParserUtils;
import org.jivesoftware.smack.xml.XmlPullParser;
@ -90,6 +92,10 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
@SuppressWarnings("HidingField")
private final BOSHConfiguration config;
private final ArrayBlockingQueueWithShutdown<TopLevelStreamElement> outgoingQueue = new ArrayBlockingQueueWithShutdown<>(100, true);
private Thread writerThread;
// Some flags which provides some info about the current state.
private boolean isFirstInitialization = true;
private boolean done = false;
@ -194,11 +200,16 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
}
}
assert writerThread == null || !writerThread.isAlive();
outgoingQueue.start();
writerThread = Async.go(this::writeElements, this + " Writer");
// If there is no feedback, throw an remote server timeout error
if (!connected && !done) {
done = true;
String errorMessage = "Timeout reached for the connection to "
+ getHost() + ":" + getPort() + ".";
instantShutdown();
throw new SmackException.SmackMessageException(errorMessage);
}
@ -207,6 +218,7 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
"<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'/>");
onStreamOpen(parser);
} catch (XmlPullParserException | IOException e) {
instantShutdown();
throw new AssertionError("Failed to setup stream environment", e);
}
}
@ -234,40 +246,92 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
afterSuccessfulLogin(false);
}
@Override
public void sendNonza(Nonza element) throws NotConnectedException {
if (done) {
throw new NotConnectedException();
}
sendElement(element);
}
private volatile boolean writerThreadRunning;
@Override
protected void sendStanzaInternal(Stanza packet) throws NotConnectedException {
sendElement(packet);
}
private void sendElement(Element element) {
private void writeElements() {
writerThreadRunning = true;
try {
send(ComposableBody.builder().setPayloadXML(element.toXML(BOSH_URI).toString()).build());
if (element instanceof Stanza) {
firePacketSendingListeners((Stanza) element);
while (true) {
TopLevelStreamElement element;
try {
element = outgoingQueue.take();
} catch (InterruptedException e) {
LOGGER.log(Level.FINE,
"Writer thread exiting: Outgoing queue was shutdown as signalled by interrupted exception",
e);
return;
}
String xmlPayload = element.toXML(BOSH_URI).toString();
ComposableBody.Builder composableBodyBuilder = ComposableBody.builder().setPayloadXML(xmlPayload);
if (sessionID != null) {
BodyQName qName = BodyQName.create(BOSH_URI, "sid");
composableBodyBuilder.setAttribute(qName, sessionID);
}
ComposableBody composableBody = composableBodyBuilder.build();
try {
client.send(composableBody);
} catch (BOSHException e) {
LOGGER.log(Level.WARNING, this + " received BOSHException in writer thread, connection broke!", e);
// TODO: Signal the user that there was an unexpected exception.
return;
}
if (element instanceof Stanza) {
Stanza stanza = (Stanza) element;
firePacketSendingListeners(stanza);
}
}
}
catch (BOSHException e) {
LOGGER.log(Level.SEVERE, "BOSHException in sendStanzaInternal", e);
} catch (Exception exception) {
LOGGER.log(Level.WARNING, "BOSH writer thread threw", exception);
} finally {
writerThreadRunning = false;
notifyWaitingThreads();
}
}
@Override
protected void sendInternal(TopLevelStreamElement element) throws NotConnectedException, InterruptedException {
throwNotConnectedExceptionIfAppropriate();
try {
outgoingQueue.put(element);
} catch (InterruptedException e) {
throwNotConnectedExceptionIfAppropriate();
// If the method above did not throw, then the sending thread was interrupted
throw e;
}
}
@Override
protected void sendNonBlockingInternal(TopLevelStreamElement element)
throws NotConnectedException, OutgoingQueueFullException {
throwNotConnectedExceptionIfAppropriate();
boolean enqueued = outgoingQueue.offer(element);
if (!enqueued) {
throwNotConnectedExceptionIfAppropriate();
throw new OutgoingQueueFullException();
}
}
/**
* Closes the connection by setting presence to unavailable and closing the
* HTTP client. The shutdown logic will be used during a planned disconnection or when
* dealing with an unexpected disconnection. Unlike {@link #disconnect()} the connection's
* BOSH stanza reader will not be removed; thus connection's state is kept.
*
*/
@Override
protected void shutdown() {
instantShutdown();
}
@Override
public void instantShutdown() {
outgoingQueue.shutdown();
try {
boolean writerThreadTerminated = waitFor(() -> !writerThreadRunning);
if (!writerThreadTerminated) {
LOGGER.severe("Writer thread of " + this + " did not terminate timely");
}
} catch (InterruptedException e) {
LOGGER.log(Level.FINE, "Interrupted while waiting for writer thread to terminate", e);
}
if (client != null) {
try {
@ -275,20 +339,15 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
} catch (Exception e) {
LOGGER.log(Level.WARNING, "shutdown", e);
}
client = null;
}
instantShutdown();
}
@Override
public void instantShutdown() {
setWasAuthenticated();
sessionID = null;
done = true;
authenticated = false;
connected = false;
isFirstInitialization = false;
client = null;
// Close down the readers and writers.
CloseableUtil.maybeClose(readerPipe, LOGGER);
@ -410,14 +469,15 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
// XMPP over BOSH is unusual when it comes to SASL authentication: Instead of sending a new stream open, it
// requires a special XML element ot be send after successful SASL authentication.
// See XEP-0206 § 5., especially the following is example 5 of XEP-0206.
ComposableBody composeableBody = ComposableBody.builder().setNamespaceDefinition("xmpp",
XMPPBOSHConnection.XMPP_BOSH_NS).setAttribute(
BodyQName.createWithPrefix(XMPPBOSHConnection.XMPP_BOSH_NS, "restart",
"xmpp"), "true").setAttribute(
BodyQName.create(XMPPBOSHConnection.BOSH_URI, "to"), getXMPPServiceDomain().toString()).build();
ComposableBody composeableBody = ComposableBody.builder()
.setNamespaceDefinition("xmpp", XMPPBOSHConnection.XMPP_BOSH_NS)
.setAttribute(BodyQName.createWithPrefix(XMPPBOSHConnection.XMPP_BOSH_NS, "restart", "xmpp"), "true")
.setAttribute(BodyQName.create(XMPPBOSHConnection.BOSH_URI, "to"), getXMPPServiceDomain().toString())
.setAttribute(BodyQName.create(BOSH_URI, "sid"), sessionID)
.build();
try {
send(composeableBody);
client.send(composeableBody);
} catch (BOSHException e) {
// jbosh's exception API does not really match the one of Smack.
throw new SmackException.SmackWrappedException(e);

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@ -51,6 +51,7 @@ import org.jivesoftware.smack.SmackException.AlreadyLoggedInException;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.SmackException.NotLoggedInException;
import org.jivesoftware.smack.SmackException.OutgoingQueueFullException;
import org.jivesoftware.smack.SmackException.ResourceBindingNotOfferedException;
import org.jivesoftware.smack.SmackException.SecurityRequiredByClientException;
import org.jivesoftware.smack.SmackException.SecurityRequiredException;
@ -460,8 +461,17 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
@Override
public abstract boolean isSecureConnection();
protected abstract void sendStanzaInternal(Stanza packet) throws NotConnectedException, InterruptedException;
// Usually batching is a good idea. So the two
// send(Internal|NonBlockingInternal) methods below could be using
// Collection<? extends TopLevelStreamElement> as parameter type instead.
// TODO: Add "batched send" support. Note that for the non-blocking variant, this probably requires a change in
// return type, so that it is possible to signal which messages could be "send" and which not.
protected abstract void sendInternal(TopLevelStreamElement element) throws NotConnectedException, InterruptedException;
protected abstract void sendNonBlockingInternal(TopLevelStreamElement element) throws NotConnectedException, OutgoingQueueFullException;
@SuppressWarnings("deprecation")
@Override
public boolean trySendStanza(Stanza stanza) throws NotConnectedException {
// Default implementation which falls back to sendStanza() as mentioned in the methods javadoc. May be
@ -476,6 +486,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
return true;
}
@SuppressWarnings("deprecation")
@Override
public boolean trySendStanza(Stanza stanza, long timeout, TimeUnit unit)
throws NotConnectedException, InterruptedException {
@ -486,7 +497,14 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
}
@Override
public abstract void sendNonza(Nonza element) throws NotConnectedException, InterruptedException;
public final void sendNonza(Nonza nonza) throws NotConnectedException, InterruptedException {
sendInternal(nonza);
}
@Override
public final void sendNonzaNonBlocking(Nonza nonza) throws NotConnectedException, OutgoingQueueFullException {
sendNonBlockingInternal(nonza);
}
@Override
public abstract boolean isUsingCompression();
@ -853,8 +871,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
return stanzaFactory;
}
@Override
public final void sendStanza(Stanza stanza) throws NotConnectedException, InterruptedException {
private Stanza preSendStanza(Stanza stanza) throws NotConnectedException {
Objects.requireNonNull(stanza, "Stanza must not be null");
assert stanza instanceof Message || stanza instanceof Presence || stanza instanceof IQ;
@ -873,7 +890,19 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
// Invoke interceptors for the new stanza that is about to be sent. Interceptors may modify
// the content of the stanza.
Stanza stanzaAfterInterceptors = firePacketInterceptors(stanza);
sendStanzaInternal(stanzaAfterInterceptors);
return stanzaAfterInterceptors;
}
@Override
public final void sendStanza(Stanza stanza) throws NotConnectedException, InterruptedException {
stanza = preSendStanza(stanza);
sendInternal(stanza);
}
@Override
public final void sendStanzaNonBlocking(Stanza stanza) throws NotConnectedException, OutgoingQueueFullException {
stanza = preSendStanza(stanza);
sendNonBlockingInternal(stanza);
}
/**
@ -2006,18 +2035,11 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
}, timeout, TimeUnit.MILLISECONDS);
addAsyncStanzaListener(stanzaListener, replyFilter);
Runnable sendOperation = () -> {
try {
sendStanza(stanza);
}
catch (NotConnectedException | InterruptedException exception) {
future.setException(exception);
}
};
if (SmackConfiguration.TRUELY_ASYNC_SENDS) {
Async.go(sendOperation);
} else {
sendOperation.run();
try {
sendStanzaNonBlocking(stanza);
}
catch (NotConnectedException | OutgoingQueueFullException exception) {
future.setException(exception);
}
return future;

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@ -387,13 +387,4 @@ public final class SmackConfiguration {
}
}
/**
* If enabled, causes {@link AbstractXMPPConnection} to create a thread for every asynchronous send operation. This
* is meant to work-around a shortcoming of Smack 4.4, where certain send operations are not asynchronous even if
* they should be. This is an expert setting, do not toggle if you do not understand the consequences or have been
* told to do so. Note that it is expected that this will not be needed in future Smack versions.
*
* @since 4.4.6
*/
public static boolean TRUELY_ASYNC_SENDS = false;
}

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@ -206,6 +206,12 @@ public abstract class SmackException extends Exception {
}
}
public static class OutgoingQueueFullException extends SmackException {
private static final long serialVersionUID = 1L;
}
public static class IllegalStateChangeException extends SmackException {
/**

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@ -22,6 +22,7 @@ import javax.xml.namespace.QName;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.SmackException.OutgoingQueueFullException;
import org.jivesoftware.smack.XMPPException.XMPPErrorException;
import org.jivesoftware.smack.filter.IQReplyFilter;
import org.jivesoftware.smack.filter.StanzaFilter;
@ -199,6 +200,8 @@ public interface XMPPConnection {
* */
void sendStanza(Stanza stanza) throws NotConnectedException, InterruptedException;
void sendStanzaNonBlocking(Stanza stanza) throws NotConnectedException, OutgoingQueueFullException;
/**
* Try to send the given stanza. Returns {@code true} if the stanza was successfully put into the outgoing stanza
* queue, otherwise, if {@code false} is returned, the stanza could not be scheduled for sending (for example
@ -213,7 +216,10 @@ public interface XMPPConnection {
* @return {@code true} if the stanza was successfully scheduled to be send, {@code false} otherwise.
* @throws NotConnectedException if the connection is not connected.
* @since 4.4.0
* @deprecated use {@link #sendStanzaNonBlocking(Stanza)} instead.
*/
// TODO: Remove in Smack 4.7.
@Deprecated
boolean trySendStanza(Stanza stanza) throws NotConnectedException;
/**
@ -234,7 +240,10 @@ public interface XMPPConnection {
* @throws NotConnectedException if the connection is not connected.
* @throws InterruptedException if the calling thread was interrupted.
* @since 4.4.0
* @deprecated use {@link #sendStanzaNonBlocking(Stanza)} instead.
*/
// TODO: Remove in Smack 4.7.
@Deprecated
boolean trySendStanza(Stanza stanza, long timeout, TimeUnit unit) throws NotConnectedException, InterruptedException;
/**
@ -251,6 +260,8 @@ public interface XMPPConnection {
*/
void sendNonza(Nonza nonza) throws NotConnectedException, InterruptedException;
void sendNonzaNonBlocking(Nonza stanza) throws NotConnectedException, OutgoingQueueFullException;
/**
* Adds a connection listener to this connection that will be notified when
* the connection closes or fails.

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@ -1,6 +1,6 @@
/**
*
* Copyright 2018-2021 Florian Schmaus
* Copyright 2018-2022 Florian Schmaus
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -37,6 +37,7 @@ import org.jivesoftware.smack.AbstractXMPPConnection;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.SmackException.OutgoingQueueFullException;
import org.jivesoftware.smack.SmackFuture;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.XMPPException.FailedNonzaException;
@ -67,7 +68,6 @@ import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Nonza;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.packet.StreamError;
import org.jivesoftware.smack.packet.TopLevelStreamElement;
import org.jivesoftware.smack.packet.XmlEnvironment;
@ -438,16 +438,7 @@ public final class ModularXmppClientToServerConnection extends AbstractXMPPConne
}
@Override
protected void sendStanzaInternal(Stanza stanza) throws NotConnectedException, InterruptedException {
sendTopLevelStreamElement(stanza);
}
@Override
public void sendNonza(Nonza nonza) throws NotConnectedException, InterruptedException {
sendTopLevelStreamElement(nonza);
}
private void sendTopLevelStreamElement(TopLevelStreamElement element) throws NotConnectedException, InterruptedException {
protected void sendInternal(TopLevelStreamElement element) throws NotConnectedException, InterruptedException {
final XmppClientToServerTransport transport = activeTransport;
if (transport == null) {
throw new NotConnectedException();
@ -457,6 +448,21 @@ public final class ModularXmppClientToServerConnection extends AbstractXMPPConne
transport.notifyAboutNewOutgoingElements();
}
@Override
protected void sendNonBlockingInternal(TopLevelStreamElement element) throws NotConnectedException, OutgoingQueueFullException {
final XmppClientToServerTransport transport = activeTransport;
if (transport == null) {
throw new NotConnectedException();
}
boolean enqueued = outgoingElementsQueue.offer(element);
if (!enqueued) {
throw new OutgoingQueueFullException();
}
transport.notifyAboutNewOutgoingElements();
}
@Override
protected void shutdown() {
shutdown(false);

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@ -1,6 +1,6 @@
/**
*
* Copyright 2010 Jive Software.
* Copyright 2010 Jive Software, 2022 Florian Schmaus.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -23,8 +23,8 @@ import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import org.jivesoftware.smack.SmackException.OutgoingQueueFullException;
import org.jivesoftware.smack.packet.ExtensionElement;
import org.jivesoftware.smack.packet.Nonza;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.packet.TopLevelStreamElement;
@ -127,13 +127,16 @@ public class DummyConnection extends AbstractXMPPConnection {
}
@Override
public void sendNonza(Nonza element) {
protected void sendInternal(TopLevelStreamElement element) {
queue.add(element);
}
@Override
protected void sendStanzaInternal(Stanza packet) {
queue.add(packet);
protected void sendNonBlockingInternal(TopLevelStreamElement element) throws OutgoingQueueFullException {
boolean enqueued = queue.add(element);
if (!enqueued) {
throw new OutgoingQueueFullException();
}
}
/**

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@ -26,6 +26,7 @@ import java.util.logging.Logger;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.packet.TopLevelStreamElement;
/**
* A threaded dummy connection.
@ -40,10 +41,11 @@ public class ThreadedDummyConnection extends DummyConnection {
private volatile boolean timeout = false;
@Override
protected void sendStanzaInternal(Stanza packet) {
super.sendStanzaInternal(packet);
protected void sendInternal(TopLevelStreamElement element) {
super.sendInternal(element);
if (packet instanceof IQ && !timeout) {
if (element instanceof IQ && !timeout) {
IQ iq = (IQ) element;
timeout = false;
// Set reply packet to match one being sent. We haven't started the
// other thread yet so this is still safe.
@ -51,11 +53,11 @@ public class ThreadedDummyConnection extends DummyConnection {
// If no reply has been set via addIQReply, then we create a simple reply
if (replyPacket == null) {
replyPacket = IQ.createResultIQ((IQ) packet);
replyPacket = IQ.createResultIQ(iq);
replyQ.add(replyPacket);
}
replyPacket.setStanzaId(packet.getStanzaId());
replyPacket.setTo(packet.getFrom());
replyPacket.setStanzaId(iq.getStanzaId());
replyPacket.setTo(iq.getFrom());
if (replyPacket.getType() == null) {
replyPacket.setType(IQ.Type.result);
}

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@ -62,6 +62,7 @@ import org.jivesoftware.smack.SmackException.ConnectionException;
import org.jivesoftware.smack.SmackException.EndpointConnectionException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.SmackException.NotLoggedInException;
import org.jivesoftware.smack.SmackException.OutgoingQueueFullException;
import org.jivesoftware.smack.SmackException.SecurityNotPossibleException;
import org.jivesoftware.smack.SmackException.SecurityRequiredByServerException;
import org.jivesoftware.smack.SmackFuture;
@ -79,12 +80,12 @@ import org.jivesoftware.smack.internal.SmackTlsContext;
import org.jivesoftware.smack.packet.Element;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Nonza;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.packet.StartTls;
import org.jivesoftware.smack.packet.StreamError;
import org.jivesoftware.smack.packet.StreamOpen;
import org.jivesoftware.smack.packet.TopLevelStreamElement;
import org.jivesoftware.smack.proxy.ProxyInfo;
import org.jivesoftware.smack.sasl.packet.SaslNonza;
import org.jivesoftware.smack.sm.SMUtils;
@ -464,7 +465,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
}
} else {
for (Stanza stanza : previouslyUnackedStanzas) {
sendStanzaInternal(stanza);
sendInternal(stanza);
}
}
@ -570,24 +571,38 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
initState();
}
@Override
public void sendNonza(Nonza element) throws NotConnectedException, InterruptedException {
packetWriter.sendStreamElement(element);
private interface SmAckAction<E extends Exception> {
void run() throws NotConnectedException, E;
}
@Override
protected void sendStanzaInternal(Stanza packet) throws NotConnectedException, InterruptedException {
packetWriter.sendStreamElement(packet);
if (isSmEnabled()) {
private <E extends Exception> void requestSmAckIfNecessary(TopLevelStreamElement element,
SmAckAction<E> smAckAction) throws NotConnectedException, E {
if (!isSmEnabled())
return;
if (element instanceof Stanza) {
Stanza stanza = (Stanza) element;
for (StanzaFilter requestAckPredicate : requestAckPredicates) {
if (requestAckPredicate.accept(packet)) {
requestSmAcknowledgementInternal();
if (requestAckPredicate.accept(stanza)) {
smAckAction.run();
break;
}
}
}
}
@Override
protected void sendInternal(TopLevelStreamElement element) throws NotConnectedException, InterruptedException {
packetWriter.sendStreamElement(element);
requestSmAckIfNecessary(element, () -> requestSmAcknowledgementInternal());
}
@Override
protected void sendNonBlockingInternal(TopLevelStreamElement element) throws NotConnectedException, OutgoingQueueFullException {
packetWriter.sendNonBlocking(element);
requestSmAckIfNecessary(element, () -> requestSmAcknowledgementNonBlockingInternal());
}
private void connectUsingConfiguration() throws ConnectionException, IOException, InterruptedException {
RemoteXmppTcpConnectionEndpoints.Result<Rfc6120TcpRemoteConnectionEndpoint> result = RemoteXmppTcpConnectionEndpoints.lookup(config);
@ -1067,7 +1082,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
List<Stanza> stanzasToResend = new ArrayList<>(unacknowledgedStanzas.size());
unacknowledgedStanzas.drainTo(stanzasToResend);
for (Stanza stanza : stanzasToResend) {
sendStanzaInternal(stanza);
XMPPTCPConnection.this.sendInternal(stanza);
}
// If there where stanzas resent, then request a SM ack for them.
// Writer's sendStreamElement() won't do it automatically based on
@ -1270,6 +1285,22 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
}
}
/**
* Sends the specified element to the server.
*
* @param element the element to send.
* @throws NotConnectedException if the XMPP connection is not connected.
* @throws OutgoingQueueFullException if there is no space in the outgoing queue.
*/
protected void sendNonBlocking(Element element) throws NotConnectedException, OutgoingQueueFullException {
throwNotConnectedExceptionIfDoneAndResumptionNotPossible();
boolean enqueued = queue.offer(element);
if (!enqueued) {
throwNotConnectedExceptionIfDoneAndResumptionNotPossible();
throw new OutgoingQueueFullException();
}
}
/**
* Shuts down the stanza writer. Once this method has been called, no further
* packets will be written to the server.
@ -1588,6 +1619,10 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
packetWriter.sendStreamElement(AckRequest.INSTANCE);
}
private void requestSmAcknowledgementNonBlockingInternal() throws NotConnectedException, OutgoingQueueFullException {
packetWriter.sendNonBlocking(AckRequest.INSTANCE);
}
/**
* Send a unconditional Stream Management acknowledgment to the server.
* <p>