How to accept and reject a subscription manually?

Smack Smack Dev
1

Below is the function to process the packet:

public void processPacket(Packet p_packet)

{

if (p_packet instanceof Message)

{

System.out.println(“Message”);

}

else if (p_packet instanceof Presence)

{

Presence l_presence = (Presence)p_packet;

if (l_presence.getType() == Presence.Type.SUBSCRIBE)

{

System.out.println("Subscription from " + l_presence.getFrom());

l_presence.setType(Presence.Type.UNSUBSCRIBED);

l_presence.setTo(l_presence.getFrom());

g_xmppConn.sendPacket(l_presence);

}

}

}

Below is the way I add packet listener:

l_xmppConn.addPacketListener(this, new PacketTypeFilter(Message.class));

l_xmppConn.addPacketListener(this, new PacketTypeFilter(Presence.class));

I want to learn how to accept and reject the subscription in code. I got the error at g_xmppConn.sendPacket(l_presence); line:

Subscription from usera@localhost

java.lang.NullPointerException

at Test.processPacket(Test.java:33)

at org.jivesoftware.smack.PacketReader$ListenerWrapper.notifyListener(PacketReader .java:817)

at org.jivesoftware.smack.PacketReader.processListeners(PacketReader.java:255)

at org.jivesoftware.smack.PacketReader.access$100(PacketReader.java:43)

at org.jivesoftware.smack.PacketReader$2.run(PacketReader.java:72)

Can expert show me how to do both ?

Thanks !

2

Most likely your g_xmppConn is null. Check if you’'ve init-ed it, and do a println before that line to see if its null.

3

Stupid me. I have global and local to XMPPConnection. I used local to get connection and global is null