我在我的应用中使用 smack XMPP 发送即时消息。一切正常,但崩溃随机发生
致命异常:java.lang.IllegalArgumentException:用户名不能为null或为空 在org.jivesoftware.smack.util.StringUtils.requireNotNullOrEmpty(StringUtils.java:468) 在org.jivesoftware.smack.AbstractXMPPConnection.login(AbstractXMPPConnection.java:484) 在org.jivesoftware.smack.AbstractXMPPConnection.login(AbstractXMPPConnection.java:448) 在org.jivesoftware.smack.ReconnectionManager $ 2.run(ReconnectionManager.java:254) 在java.lang.Thread.run(Thread.java:818)
据我了解,有时它只是用于登录而找不到用户名。这在大多数情况下都可以正常工作,这有点奇怪。
我正在使用的图书馆是
org.jivesoftware.smack
这是我用于连接的方法
public void connect()
{
Logger.writeSummaryLog(NewMyXMPP.class.getSimpleName(), "connect()", "Requesting XMPP connection", true);
if (connection != null && connection.isConnected())
{
Logger.writeSummaryLog(NewMyXMPP.class.getSimpleName(), "connect()", "XMPP already connected, returning", true);
return;
}
AsyncTask.execute(new Runnable()
{
private final int MAX_RETRIES = 3;
private int retryCount = 0;
@Override
public void run()
{
//KW: if network available but internet not available it will return
if (!initializeConnection())
{
MyApplication.updateConnectionStatus(CommonEnum.ConnectionStatus.eDisconnect);
return;
}
if (connection.isConnected())
{
MyApplication.updateConnectionStatus(CommonEnum.ConnectionStatus.eConnected);
return;
}
MyApplication.updateConnectionStatus(CommonEnum.ConnectionStatus.eConnecting);
try
{
//KW: on Connected listener we will changes connection status and send login
connection.connect();
Logger.writeSummaryLog(NewMyXMPP.class.getSimpleName(), "connect()", "Connected to XMPP server!", true);
return;
}
catch (IOException e)
{
Logger.writeExceptionLog(NewMyXMPP.class.getSimpleName(), "connect()", "IOException", e, true);
}
catch (SmackException e)
{
Logger.writeExceptionLog(NewMyXMPP.class.getSimpleName(), "connect()", "SmackException", e, true);
// AI: SmackException happens when socket times out, which sometimes happen, so
// retry after 1 sec.
/*if (retryCount < MAX_RETRIES)
{
new Timer().schedule(new TimerTask()
{
@Override
public void run()
{
Logger.writeSummaryLog(NewMyXMPP.class.getSimpleName(), "connect()", "Retrying connection after 1 sec", true);
connect();
}
}, 1000);
}*/
}
catch (XMPPException e)
{
Logger.writeExceptionLog(NewMyXMPP.class.getSimpleName(), "connect()", "XMPPException", e, true);
}
catch (InterruptedException e)
{
Logger.writeExceptionLog(NewMyXMPP.class.getSimpleName(), "connect()", "InterruptedException", e, true);
}
catch (Exception e)
{
Logger.writeExceptionLog(NewMyXMPP.class.getSimpleName(), "connect()", "Exception", e, true);
}
MyApplication.updateConnectionStatus(CommonEnum.ConnectionStatus.eDisconnect);
}
});
}
private boolean initializeConnection()
{
try
{
SmackConfiguration.addDisabledSmackClass("org.jivesoftware.smack.util.dns.minidns.MiniDnsResolver");
XMPPTCPConnectionConfiguration.Builder config = XMPPTCPConnectionConfiguration.builder();
// START FROM HERE...
// Unable to resolve host "betaxmpp.lynkapp.net": No address associated with hostname
InetAddress inetAddress = InetAddress.getByName(serverAddress);
config.setHostAddress(inetAddress);
config.setSecurityMode(ConnectionConfiguration.SecurityMode.ifpossible);
config.setServiceName(CommonMethods.createDomainBareJid(serverAddress));
config.setHost(serverAddress);
config.setKeystoreType(KeyStore.getDefaultType());
//need https authentication
//so need to provide key store
//android has default many certificates so need to authenticate using those certifictes
KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
// when we provide any key store we also need to provide its algorithm
String defaultAlgorithm = KeyManagerFactory.getDefaultAlgorithm();
KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(defaultAlgorithm);
//authenticate keystore with null password
keyManagerFactory.init(keyStore, null);
//with all these setting we need to create the ssl authentication context
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(keyManagerFactory.getKeyManagers(), null, null);
//provide this authentication to our configration
config.setCustomSSLContext(sslContext);
config.setXmppDomain(serverAddress);
config.setPort(5222);
config.setDebuggerEnabled(true);
config.setConnectTimeout(30000);
// No need to send presence.
config.setSendPresence(false);
// We should use stream managment.
XMPPTCPConnection.setUseStreamManagementResumptiodDefault(true);
XMPPTCPConnection.setUseStreamManagementDefault(true);
// Temp code to check if server handles it properly and have only 1 session.
config.setResource(AppConstants.ResourceID);
connection = new XMPPTCPConnection(config.build());
// Get callbacks for connection.
XMPPConnectionListener connectionListener = new XMPPConnectionListener();
connection.addConnectionListener(connectionListener);
//Reconnect xmpp connection after every 10sec when connection is disconnected
ReconnectionManager manager = ReconnectionManager.getInstanceFor(connection);
manager.enableAutomaticReconnection();
manager.setReconnectionPolicy(ReconnectionManager.ReconnectionPolicy.FIXED_DELAY);
manager.setFixedDelay(3);
return true;
}
catch (UnknownHostException e)
{
Logger.writeExceptionLog(NewMyXMPP.class.getSimpleName(), "initializeConnection()", "UnknownHostException", e, true);
}
catch (XmppStringprepException e)
{
Logger.writeExceptionLog(NewMyXMPP.class.getSimpleName(), "initializeConnection()", "XmppStringprepException", e, true);
}
catch (Exception e)
{
Logger.writeExceptionLog(NewMyXMPP.class.getSimpleName(), "initializeConnection()", "Exception", e, true);
}
return false;
}
谢谢
答案 0 :(得分:0)
如我所见,异常是在重新连接管理器上。
我敢打赌,有时您会根据与登录状态相关的变量来配置重新连接管理器。
成功登录后移动此部分
//Reconnect xmpp connection after every 10sec when connection is disconnected
ReconnectionManager manager = ReconnectionManager.getInstanceFor(connection);
manager.enableAutomaticReconnection();
manager.setReconnectionPolicy(ReconnectionManager.ReconnectionPolicy.FIXED_DELAY);
manager.setFixedDelay(3);
请记住,重新连接管理器只能管理重新连接,而不能无限尝试首次连接(例如:在服务器关闭时启动应用程序)。要获得后面的行为,只需将连接阶段封装在while-with-sleep循环中即可。