how to create persistent muc room in smack 4.1 beta2

migrated from asmack to smack 4.1 beta2. The muc rooms created are no longer persistent.

MultiUserChatManager mucm=MultiUserChatManager.getInstanceFor(connection);
muc=mucm.getMultiUserChat(groupid+"@conference.localhost");
DiscussionHistory histroy=new DiscussionHistory();
histroy.setMaxStanzas(10);
muc.createOrJoin(username,null,histroy,SmackConfiguration.getDefaultPacketReplyTimeout());
muc.nextMessage();

when created with gajim, the rooms are persistent.

EDIT : Here is code we used earlier. By default the chat rooms were persistent,

muc = new MultiUserChat(connection, groupid+"@conference.localhost");

if(!muc.isJoined())
{
DiscussionHistory histroy=new DiscussionHistory();
histroy.setMaxStanzas(10);
muc.join(username,null,histroy,SmackConfiguration.getDefaultPacketReplyTimeout());
muc.nextMessage(0);
}

saurabh dixit

You need to submit form like this for making a persistent group:

private void setConfig(MultiUserChat multiUserChat) {
    try {
        Form form = multiUserChat.getConfigurationForm();
        Form submitForm = form.createAnswerForm();
        for (Iterator<FormField> fields = submitForm.getFields(); fields.hasNext();) {
            FormField field = (FormField) fields.next();
            if (!FormField.TYPE_HIDDEN.equals(field.getType()) && field.getVariable() != null) {
                submitForm.setDefaultAnswer(field.getVariable());
            }
        }
        submitForm.setAnswer("muc#roomconfig_publicroom", true);
        submitForm.setAnswer("muc#roomconfig_persistentroom", true);
        multiUserChat.sendConfigurationForm(submitForm);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

You need to set muc#roomconfig_persistentroom to true in the MUC configuration from when creating the room.

MultiuserChat muc = manager.getMultiUserChat("myroom@muc.example.org");
muc.create("myNick");
// room is now created by locked
Form form = muc.getConfigurationForm();
Form answerForm = form.createAnswerForm();
answerForm.setAnswer("muc#roomconfig_persistentroom", true);
muc.sendConfigurationForm(answerForm);
// sending the configuration form unlocks the room

Note that not all XMPP MUC services support persistent rooms. For more information see:

In smack 4.1.1, The answers given by @saurabh dixit throw an exception. Please check this thread on ignite website Correct implementation for persistent rooms smack 4.1.1

来源：https://stackoverflow.com/questions/28410186/how-to-create-persistent-muc-room-in-smack-4-1-beta2

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xmpp

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multiuserchat