110 lines
4.0 KiB
Java
110 lines
4.0 KiB
Java
/**
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*
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* Copyright 2003-2006 Jive Software.
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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.filetransfer;
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import java.io.InputStream;
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import java.io.OutputStream;
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import org.jivesoftware.smack.SmackException;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smack.XMPPException.XMPPErrorException;
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import org.jivesoftware.smack.packet.IQ;
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import org.jivesoftware.smack.packet.Stanza;
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import org.jivesoftware.smackx.bytestreams.ibb.packet.Open;
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import org.jivesoftware.smackx.bytestreams.socks5.packet.Bytestream;
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import org.jivesoftware.smackx.si.packet.StreamInitiation;
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import org.jxmpp.jid.Jid;
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/**
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* The fault tolerant negotiator takes two stream negotiators, the primary and the secondary
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* negotiator. If the primary negotiator fails during the stream negotiaton process, the second
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* negotiator is used.
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*/
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public class FaultTolerantNegotiator extends StreamNegotiator {
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private final StreamNegotiator primaryNegotiator;
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private final StreamNegotiator secondaryNegotiator;
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public FaultTolerantNegotiator(XMPPConnection connection, StreamNegotiator primary,
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StreamNegotiator secondary) {
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super(connection);
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this.primaryNegotiator = primary;
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this.secondaryNegotiator = secondary;
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}
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@Override
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public void newStreamInitiation(Jid from, String streamID) {
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primaryNegotiator.newStreamInitiation(from, streamID);
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secondaryNegotiator.newStreamInitiation(from, streamID);
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}
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@Override
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InputStream negotiateIncomingStream(Stanza streamInitiation) {
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throw new UnsupportedOperationException("Negotiation only handled by create incoming " +
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"stream method.");
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}
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@Override
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public InputStream createIncomingStream(final StreamInitiation initiation) throws SmackException, XMPPErrorException, InterruptedException {
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// This could be either an xep47 ibb 'open' iq or an xep65 streamhost iq
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IQ initationSet = initiateIncomingStream(connection(), initiation);
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StreamNegotiator streamNegotiator = determineNegotiator(initationSet);
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return streamNegotiator.negotiateIncomingStream(initationSet);
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}
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private StreamNegotiator determineNegotiator(Stanza streamInitiation) {
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if (streamInitiation instanceof Bytestream) {
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return primaryNegotiator;
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} else if (streamInitiation instanceof Open) {
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return secondaryNegotiator;
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} else {
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throw new IllegalStateException("Unknown stream initation type");
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}
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}
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@Override
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public OutputStream createOutgoingStream(String streamID, Jid initiator, Jid target)
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throws SmackException, XMPPException, InterruptedException {
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OutputStream stream;
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try {
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stream = primaryNegotiator.createOutgoingStream(streamID, initiator, target);
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}
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catch (Exception ex) {
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stream = secondaryNegotiator.createOutgoingStream(streamID, initiator, target);
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}
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return stream;
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}
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@Override
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public String[] getNamespaces() {
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String[] primary = primaryNegotiator.getNamespaces();
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String[] secondary = secondaryNegotiator.getNamespaces();
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String[] namespaces = new String[primary.length + secondary.length];
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System.arraycopy(primary, 0, namespaces, 0, primary.length);
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System.arraycopy(secondary, 0, namespaces, primary.length, secondary.length);
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return namespaces;
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}
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}
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