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Code Issues Releases Wiki Activity

SMACK-417 If both PacketReader and PacketWriter fail at the same time, connectionClosedonError() is called two times

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Refactored notifyConnectionError() and notifyReconnection() from PacketReader to XMPPConnection. Made PacketReader.done and PacketWriter.done volatile. Prevent duplicate connectionClosedonError() calls by making the method synchronzied and protected them with an enter guard: if (packetReader.done && packetWriter.done) return;

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/branches/smack_3_3_0@13568 b35dd754-fafc-0310-a699-88a17e54d16e
This commit is contained in:
Florian Schmaus 2013-03-18 19:58:48 +00:00 committed by flow
parent 6dcf8e0123
commit a55b54f20b
5 changed files with 65 additions and 61 deletions
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46
source/org/jivesoftware/smack/PacketReader.java
View file

@ -48,7 +48,7 @@ class PacketReader {
private XMPPConnection connection;
private XmlPullParser parser;
private boolean done;
volatile boolean done;
private String connectionID = null;
private Semaphore connectionSemaphore;
@ -155,48 +155,6 @@ class PacketReader {
connection.collectors.clear();
}
/**
* Sends out a notification that there was an error with the connection
* and closes the connection.
*
* @param e the exception that causes the connection close event.
*/
void notifyConnectionError(Exception e) {
done = true;
// Closes the connection temporary. A reconnection is possible
connection.shutdown(new Presence(Presence.Type.unavailable));
// Print the stack trace to help catch the problem
e.printStackTrace();
// Notify connection listeners of the error.
for (ConnectionListener listener : connection.getConnectionListeners()) {
try {
listener.connectionClosedOnError(e);
}
catch (Exception e2) {
// Catch and print any exception so we can recover
// from a faulty listener
e2.printStackTrace();
}
}
}
/**
* Sends a notification indicating that the connection was reconnected successfully.
*/
protected void notifyReconnection() {
// Notify connection listeners of the reconnection.
for (ConnectionListener listener : connection.getConnectionListeners()) {
try {
listener.reconnectionSuccessful();
}
catch (Exception e) {
// Catch and print any exception so we can recover
// from a faulty listener
e.printStackTrace();
}
}
}
/**
* Resets the parser using the latest connection's reader. Reseting the parser is necessary
* when the plain connection has been secured or when a new opening stream element is going
@ -332,7 +290,7 @@ class PacketReader {
if (!(done || connection.isSocketClosed())) {
// Close the connection and notify connection listeners of the
// error.
notifyConnectionError(e);
connection.notifyConnectionError(e);
}
}
}

4
source/org/jivesoftware/smack/PacketWriter.java
View file

@ -44,7 +44,7 @@ class PacketWriter {
private Writer writer;
private XMPPConnection connection;
private final BlockingQueue<Packet> queue;
private boolean done;
volatile boolean done;
/**
* Timestamp when the last stanza was sent to the server. This information is used
@ -245,7 +245,7 @@ class PacketWriter {
// packetReader could be set to null by an concurrent disconnect() call.
// Therefore Prevent NPE exceptions by checking packetReader.
if (connection.packetReader != null) {
connection.packetReader.notifyConnectionError(ioe);
connection.notifyConnectionError(ioe);
}
}
}

68
source/org/jivesoftware/smack/XMPPConnection.java
View file

@ -473,6 +473,10 @@ public class XMPPConnection extends Connection {
return;
}
if (!isConnected()) {
return;
}
shutdown(unavailablePresence);
if (roster != null) {
@ -483,9 +487,7 @@ public class XMPPConnection extends Connection {
wasAuthenticated = false;
packetWriter.cleanup();
packetWriter = null;
packetReader.cleanup();
packetReader = null;
}
public void sendPacket(Packet packet) {
@ -614,10 +616,8 @@ public class XMPPConnection extends Connection {
*/
private void initConnection() throws XMPPException {
boolean isFirstInitialization = packetReader == null || packetWriter == null;
if (!isFirstInitialization) {
compressionHandler = null;
serverAckdCompression = false;
}
compressionHandler = null;
serverAckdCompression = false;
// Set the reader and writer instance variables
initReaderAndWriter();
@ -661,7 +661,7 @@ public class XMPPConnection extends Connection {
}
}
else if (!wasAuthenticated) {
packetReader.notifyReconnection();
notifyReconnection();
}
}
@ -773,7 +773,7 @@ public class XMPPConnection extends Connection {
void startTLSReceived(boolean required) {
if (required && config.getSecurityMode() ==
ConnectionConfiguration.SecurityMode.disabled) {
packetReader.notifyConnectionError(new IllegalStateException(
notifyConnectionError(new IllegalStateException(
"TLS required by server but not allowed by connection configuration"));
return;
}
@ -787,7 +787,7 @@ public class XMPPConnection extends Connection {
writer.flush();
}
catch (IOException e) {
packetReader.notifyConnectionError(e);
notifyConnectionError(e);
}
}
@ -977,7 +977,7 @@ public class XMPPConnection extends Connection {
writer.flush();
}
catch (IOException e) {
packetReader.notifyConnectionError(e);
notifyConnectionError(e);
}
}
@ -1041,7 +1041,7 @@ public class XMPPConnection extends Connection {
login(config.getUsername(), config.getPassword(),
config.getResource());
}
packetReader.notifyReconnection();
notifyReconnection();
}
catch (XMPPException e) {
e.printStackTrace();
@ -1059,4 +1059,50 @@ public class XMPPConnection extends Connection {
this.wasAuthenticated = wasAuthenticated;
}
}
/**
* Sends out a notification that there was an error with the connection
* and closes the connection. Also prints the stack trace of the given exception
*
* @param e the exception that causes the connection close event.
*/
synchronized void notifyConnectionError(Exception e) {
// Listeners were already notified of the exception, return right here.
if (packetReader.done && packetWriter.done) return;
packetReader.done = true;
packetWriter.done = true;
// Closes the connection temporary. A reconnection is possible
shutdown(new Presence(Presence.Type.unavailable));
// Print the stack trace to help catch the problem
e.printStackTrace();
// Notify connection listeners of the error.
for (ConnectionListener listener : getConnectionListeners()) {
try {
listener.connectionClosedOnError(e);
}
catch (Exception e2) {
// Catch and print any exception so we can recover
// from a faulty listener
e2.printStackTrace();
}
}
}
/**
* Sends a notification indicating that the connection was reconnected successfully.
*/
protected void notifyReconnection() {
// Notify connection listeners of the reconnection.
for (ConnectionListener listener : getConnectionListeners()) {
try {
listener.reconnectionSuccessful();
}
catch (Exception e) {
// Catch and print any exception so we can recover
// from a faulty listener
e.printStackTrace();
}
}
}
}

6
test/org/jivesoftware/smack/ReconnectionTest.java
View file

@ -44,7 +44,7 @@ public class ReconnectionTest extends SmackTestCase {
connection.addConnectionListener(listener);
// Simulates an error in the connection
connection.packetReader.notifyConnectionError(new Exception("Simulated Error"));
connection.notifyConnectionError(new Exception("Simulated Error"));
Thread.sleep(12000);
// After 10 seconds, the reconnection manager must reestablishes the connection
assertEquals("The ConnectionListener.connectionStablished() notification was not fired",
@ -79,7 +79,7 @@ public class ReconnectionTest extends SmackTestCase {
connection.addConnectionListener(listener);
// Simulates an error in the connection
connection.packetReader.notifyConnectionError(new Exception("Simulated Error"));
connection.notifyConnectionError(new Exception("Simulated Error"));
Thread.sleep(12000);
// After 10 seconds, the reconnection manager must reestablishes the connection
assertEquals("The ConnectionListener.connectionStablished() notification was not fired",
@ -103,7 +103,7 @@ public class ReconnectionTest extends SmackTestCase {
connection.addConnectionListener(listener);
// Produces a connection error
connection.packetReader.notifyConnectionError(new Exception("Simulated Error"));
connection.notifyConnectionError(new Exception("Simulated Error"));
assertEquals(
"An error occurs but the ConnectionListener.connectionClosedOnError(e) was not notified",
true, listener.connectionClosedOnError);

2
test/org/jivesoftware/smack/RosterSmackTest.java
View file

@ -689,7 +689,7 @@ public class RosterSmackTest extends SmackTestCase {
Thread.sleep(200);
// Break the connection
getConnection(0).packetReader.notifyConnectionError(new Exception("Simulated Error"));
getConnection(0).notifyConnectionError(new Exception("Simulated Error"));
Presence presence = roster.getPresence(getBareJID(1));
assertFalse("Unavailable presence not found for offline user", presence.isAvailable());