With bb8dcc9874 the concept if IQ request
handlers was introduced in Smack. This doesn't allow packet/stanza
collectors/listeners to filter for incoming IQ requests. Unfortunately
the file transfer code relied on this being able, so it broke with the
change.
There were two places where the file transfer code was listening for
incoming IQ requests:
- InitationListener(s)
- Negotiator(s)
With this change, we let the InitiationListener signal the existence of
an incoming initation request, send by an IQ of type 'set', using the
newly created EventManager utility.
The negotiator waits for those events to arrive and proceedes as it would
have done when the packet collector was used.
the combination with concurrencyLevel and LinkedBlockingQueue never
worked as intented. The idea was that the cachedExecutorService would
spawn new threads until maximumPoolSize (=concurrencyLevel) is reached,
and then start queing the Runnables.
But this was not the case, since ThreadPoolExecutor does not take into
consideration if the worker threads is busy, i.e. executing a Runnable,
or idle, i.e. waiting for a Runnable.
This means that if a busy Worker would execute a Runnable, which would
block, because it's waiting for an event (e.g. an incoming IQ
request), then the handling of those incoming IQ request would be
queued by ThreadPoolExecutor, because no fewer threads then corePoolSize
are running and the task can be queued (since the LinkedBlockingQueue is
unbounded).
Using the term 'enabled' was a terriable choice from a security
perspective, as it gives the user the impression that the security is
"enabled". In fact this setting is only slightly better then
"disabled".
Make that fact clear in the javadoc too.
The XMPPConnection interface does not define methods to manipulate the
connection state (e.g. connect(), disconnect()). The example should use
the connection type as declared type.
Since e6045c6593 the cached executor
services maximum pool size is limited to concurrencyLevel (was
previously Integer.MAX_VALUE). In order to prevent
RejectExecutionException we need to use an queue which max size is
greater than 1 (i.e. nont an SynchronousQueue).
Connection closed with error java.util.concurrent.RejectedExecutionException: Task org.jivesoftware.smack.tcp.XMPPTCPConnection$2@41dce200 rejected from java.util.concurrent.ThreadPoolExecutor@41d59150[Running, pool size = 3, active threads = 3, queued tasks = 0, completed tasks = 4]
at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2011)
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:793)
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1339)
at org.jivesoftware.smack.AbstractXMPPConnection.asyncGo(AbstractXMPPConnection.java:1583)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.processHandledCount(XMPPTCPConnection.java:1655)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.access$2300(XMPPTCPConnection.java:137)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.parsePackets(XMPPTCPConnection.java:1083)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.access$200(XMPPTCPConnection.java:896)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader$1.run(XMPPTCPConnection.java:911)
at java.lang.Thread.run(Thread.java:841)
and remove getConnectionID().
Also make streamId a field of AbstractXMPPConnection. Most XMPP
connection types have a streamId, it appears to be optional when BOSH
is used though.
RFC 6121 § 5.2.2:
"""
If an application receives a message with no 'type' attribute or the
application does not understand the value of the 'type' attribute
provided, it MUST consider the message to be of type "normal" (i.e.,
"normal" is the default).
"""
Otherwise we may get an NPE if the key was cached:
Connection closed with error java.lang.NullPointerException: Attempt to get length of null array
at org.jivesoftware.smack.util.stringencoder.Base64.encodeToString(Base64.java:43)
at org.jivesoftware.smack.sasl.core.SCRAMSHA1Mechanism.evaluateChallenge(SCRAMSHA1Mechanism.java:201)
at org.jivesoftware.smack.sasl.SASLMechanism.challengeReceived(SASLMechanism.java:230)
at org.jivesoftware.smack.SASLAuthentication.challengeReceived(SASLAuthentication.java:328)
at org.jivesoftware.smack.SASLAuthentication.authenticated(SASLAuthentication.java:347)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.access$200(XMPPTCPConnection.java:894)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader$1.run(XMPPTCPConnection.java:909)
at java.lang.Thread.run(Thread.java:818)
instead of just logging a warning if the XMPP domain has no DNS SRV
lookups, create the failedAddresses list now within DNSUtil and add the
information that the SRV lookup failed.
In initConnection, only initReaderAndWriter() throws IOException.
connectUsingConfiguration doesn't need to take an argument.
PacketReader.init does not throw a SmackException.
Use Async.go() in PacketWriter, just like it's already done in PacketReader.
Also limit the max pool size of the remove callbacks service and use the
same keep alive time for idle threads as the cached executor service
uses.
Note that it would be possible to merge those two. But this could lead
to tasks from the cached executor service blocking the removal of
callbacks, which we don't want.
