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Check if unacknowledged stanzas queue is full before adding to it 

to avoid an IllegalStateException.

Fixes SMACK-844.
This commit is contained in:
Florian Schmaus 2018-12-08 22:54:13 +01:00
parent 0c134db072
commit 5ddaa623da
2 changed files with 64 additions and 1 deletions
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54
smack-tcp/src/main/java/org/jivesoftware/smack/sm/StreamManagementException.java
View File

@ -16,10 +16,13 @@
*/
package org.jivesoftware.smack.sm;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.packet.Element;
import org.jivesoftware.smack.packet.Stanza;
public abstract class StreamManagementException extends SmackException {
@ -110,5 +113,56 @@ public abstract class StreamManagementException extends SmackException {
return ackedStanzas;
}
}
public static final class UnacknowledgedQueueFullException extends StreamManagementException {
/**
*
*/
private static final long serialVersionUID = 1L;
private final int overflowElementNum;
private final int droppedElements;
private final List<Element> elements;
private final List<Stanza> unacknowledgesStanzas;
private UnacknowledgedQueueFullException(String message, int overflowElementNum, int droppedElements, List<Element> elements,
List<Stanza> unacknowledgesStanzas) {
super(message);
this.overflowElementNum = overflowElementNum;
this.droppedElements = droppedElements;
this.elements = elements;
this.unacknowledgesStanzas = unacknowledgesStanzas;
}
public int getOverflowElementNum() {
return overflowElementNum;
}
public int getDroppedElements() {
return droppedElements;
}
public List<Element> getElements() {
return elements;
}
public List<Stanza> getUnacknowledgesStanzas() {
return unacknowledgesStanzas;
}
public static UnacknowledgedQueueFullException newWith(int overflowElementNum, List<Element> elements,
BlockingQueue<Stanza> unacknowledgedStanzas) {
final int unacknowledgesStanzasQueueSize = unacknowledgedStanzas.size();
List<Stanza> localUnacknowledgesStanzas = new ArrayList<>(unacknowledgesStanzasQueueSize);
localUnacknowledgesStanzas.addAll(unacknowledgedStanzas);
int droppedElements = elements.size() - overflowElementNum - 1;
String message = "The queue size " + unacknowledgesStanzasQueueSize + " is not able to fit another "
+ droppedElements + " potential stanzas type top-level stream-elements.";
return new UnacknowledgedQueueFullException(message, overflowElementNum, droppedElements, elements,
localUnacknowledgesStanzas);
}
}
}

11
smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java
View File

@ -1514,7 +1514,16 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
private void drainWriterQueueToUnacknowledgedStanzas() {
List<Element> elements = new ArrayList<>(queue.size());
queue.drainTo(elements);
for (Element element : elements) {
for (int i = 0; i < elements.size(); i++) {
Element element = elements.get(i);
// If the unacknowledgedStanza queue is full, then bail out with a warning message. See SMACK-844.
if (unacknowledgedStanzas.remainingCapacity() == 0) {
StreamManagementException.UnacknowledgedQueueFullException exception = StreamManagementException.UnacknowledgedQueueFullException
.newWith(i, elements, unacknowledgedStanzas);
LOGGER.log(Level.WARNING,
"Some stanzas may be lost as not all could be drained to the unacknowledged stanzas queue", exception);
return;
}
if (element instanceof Stanza) {
unacknowledgedStanzas.add((Stanza) element);
}