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fcc8414a92
There is a unsolveable race condition between the connection state and sendPacket(), i.e. the connection could go down, right after the method calling sendPacket is called, but before sendPacket() is invoked. Before this change, sendPacket() has thrown an unchecked IllegalStateException, which could be ignored by the Smack user, who would also not notice the race condition. We have decided to throw a checked Exception in this case now, to make the Smack user aware of this situation. SMACK-426
53 lines
2 KiB
Java
53 lines
2 KiB
Java
/**
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*
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* Copyright 2014 Florian Schmaus
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.vcardtemp;
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import org.jivesoftware.smack.ConnectionCreationListener;
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import org.jivesoftware.smack.SmackException.NoResponseException;
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import org.jivesoftware.smack.SmackException.NotConnectedException;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException.XMPPErrorException;
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import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
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public class VCardManager {
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public static final String NAMESPACE = "vcard-temp";
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public static final String ELEMENT = "vCard";
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static {
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XMPPConnection.addConnectionCreationListener(new ConnectionCreationListener() {
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@Override
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public void connectionCreated(XMPPConnection connection) {
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ServiceDiscoveryManager.getInstanceFor(connection).addFeature(NAMESPACE);
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}
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});
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}
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/**
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* Returns true if the given entity understands the vCard-XML format and allows the exchange of such.
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*
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* @param jid
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* @param connection
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* @return true if the given entity understands the vCard-XML format and exchange.
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* @throws XMPPErrorException
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* @throws NoResponseException
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* @throws NotConnectedException
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*/
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public static boolean isSupported(String jid, XMPPConnection connection) throws NoResponseException, XMPPErrorException, NotConnectedException {
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return ServiceDiscoveryManager.getInstanceFor(connection).supportsFeature(jid, NAMESPACE);
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}
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}
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