*
* So far this means that:
* 1) a set of classes will be loaded in order to execute their static init block
* 2) retrieve and set the current Smack release
*/
static {
try {
// Get an array of class loaders to try loading the providers files from.
ClassLoader[] classLoaders = getClassLoaders();
for (ClassLoader classLoader : classLoaders) {
Enumeration configEnum = classLoader.getResources("META-INF/smack-config.xml");
while (configEnum.hasMoreElements()) {
URL url = (URL) configEnum.nextElement();
InputStream systemStream = null;
try {
systemStream = url.openStream();
XmlPullParser parser = new MXParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
parser.setInput(systemStream, "UTF-8");
int eventType = parser.getEventType();
do {
if (eventType == XmlPullParser.START_TAG) {
if (parser.getName().equals("className")) {
// Attempt to load the class so that the class can get initialized
parseClassToLoad(parser);
}
else if (parser.getName().equals("packetReplyTimeout")) {
packetReplyTimeout =
parseIntProperty(parser, packetReplyTimeout);
}
else if (parser.getName().equals("keepAliveInterval")) {
keepAliveInterval = parseIntProperty(parser, keepAliveInterval);
}
}
eventType = parser.next();
}
while (eventType != XmlPullParser.END_DOCUMENT);
}
catch (Exception e) {
e.printStackTrace();
}
finally {
try {
systemStream.close();
}
catch (Exception e) {
// Ignore.
}
}
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
/**
* Returns the Smack version information, eg "1.3.0".
*
* @return the Smack version information.
*/
public static String getVersion() {
return SMACK_VERSION;
}
/**
* Returns the number of milliseconds to wait for a response from
* the server. The default value is 5000 ms.
*
* @return the milliseconds to wait for a response from the server
*/
public static int getPacketReplyTimeout() {
// The timeout value must be greater than 0 otherwise we will answer the default value
if (packetReplyTimeout <= 0) {
packetReplyTimeout = 5000;
}
return packetReplyTimeout;
}
/**
* Sets the number of milliseconds to wait for a response from
* the server.
*
* @param timeout the milliseconds to wait for a response from the server
*/
public static void setPacketReplyTimeout(int timeout) {
if (timeout <= 0) {
throw new IllegalArgumentException();
}
packetReplyTimeout = timeout;
}
/**
* Returns the number of milleseconds delay between sending keep-alive
* requests to the server. The default value is 30000 ms. A value of -1
* mean no keep-alive requests will be sent to the server.
*
* @return the milliseconds to wait between keep-alive requests, or -1 if
* no keep-alive should be sent.
*/
public static int getKeepAliveInterval() {
return keepAliveInterval;
}
/**
* Sets the number of milleseconds delay between sending keep-alive
* requests to the server. The default value is 30000 ms. A value of -1
* mean no keep-alive requests will be sent to the server.
*
* @param interval the milliseconds to wait between keep-alive requests,
* or -1 if no keep-alive should be sent.
*/
public static void setKeepAliveInterval(int interval) {
keepAliveInterval = interval;
}
private static void parseClassToLoad(XmlPullParser parser) throws Exception {
String className = parser.nextText();
// Attempt to load the class so that the class can get initialized
try {
Class.forName(className);
}
catch (ClassNotFoundException cnfe) {
System.err.println("Error! A startup class specified in smack-config.xml could " +
"not be loaded: " + className);
}
}
private static int parseIntProperty(XmlPullParser parser, int defaultValue)
throws Exception
{
try {
return Integer.parseInt(parser.nextText());
}
catch (NumberFormatException nfe) {
nfe.printStackTrace();
return defaultValue;
}
}
/**
* Returns an array of class loaders to load resources from.
*
* @return an array of ClassLoader instances.
*/
private static ClassLoader[] getClassLoaders() {
ClassLoader[] classLoaders = new ClassLoader[2];
classLoaders[0] = SmackConfiguration.class.getClassLoader();
classLoaders[1] = Thread.currentThread().getContextClassLoader();
// Clean up possible null values. Note that #getClassLoader may return a null value.
List