Smack API 抛出 item-not-found(404) 异常答案

【问题标题】：Smack API throws item-not-found(404) exceptionSmack API 抛出 item-not-found(404) 异常
【发布时间】：2016-05-31 18:40:06
【问题描述】：

这里是代码

Iterator i = MultiUserChat.getJoinedRooms(connectionManager.getXMPPConnection(), "test123@dulanjaya-pc");
while(i.hasNext()) {
    System.out.println(i.next());
}

【问题讨论】：

发现问题；该代码不包含main(String[]) 方法。此外，connectionManager 永远不会被初始化，并且它们都不包含在类中。
好吧。 connectionManager 已初始化。代码中没有提到

标签： java xmpp smack

【解决方案1】：

想通了。需要把服务作为/Smack

Iterator i = MultiUserChat.getJoinedRooms(connectionManager.getXMPPConnection(), "test123@dulanjaya-pc/Smack");

【讨论】：

【解决方案2】：

也许这段代码 sn-p 对你有帮助。

boolean supports = MultiUserChat.isServiceEnabled(connection,"test3@pc2010102716/spark");    
if(supports) {   
                Iterator<String> joinedRooms = MultiUserChat.getJoinedRooms(connection,"test3@pc2010102716/spark");  
                while(joinedRooms.hasNext()) {   
                    System.out.println("test3 has joined Room " + joinedRooms.next());   
                }   
            }

【讨论】：

【解决方案3】：

getJoinedRooms 的源代码如下所示，告诉我们该方法的第二个参数需要一个完全限定的 xmpp ID。它显示的 ID 示例不完整，完整的 ID 应包含资源名称，例如 /smack、/spark 和 /android。

 /**
     * Returns an Iterator on the rooms where the requested user has joined. The Iterator will
     * contain Strings where each String represents a room (e.g. room@muc.jabber.org).
     *
     * @param connection the connection to use to perform the service discovery.
     * @param user the user to check. A fully qualified xmpp ID, e.g. jdoe@example.com.
     * @return an Iterator on the rooms where the requested user has joined.
     */
    public static Iterator<String> getJoinedRooms(Connection connection, String user) {
        try {
            ArrayList<String> answer = new ArrayList<String>();
            // Send the disco packet to the user
            DiscoverItems result =
                ServiceDiscoveryManager.getInstanceFor(connection).discoverItems(user, discoNode);
            // Collect the entityID for each returned item
            for (Iterator<DiscoverItems.Item> items=result.getItems(); items.hasNext();) {
                answer.add(items.next().getEntityID());
            }
            return answer.iterator();
        }
        catch (XMPPException e) {
            e.printStackTrace();
            // Return an iterator on an empty collection
            return new ArrayList<String>().iterator();
        }
    }

【讨论】：