1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package org.apache.hc.core5.http2.impl.nio;
29
30 import java.io.IOException;
31
32 import org.apache.hc.core5.annotation.Contract;
33 import org.apache.hc.core5.annotation.Internal;
34 import org.apache.hc.core5.annotation.ThreadingBehavior;
35 import org.apache.hc.core5.concurrent.FutureCallback;
36 import org.apache.hc.core5.http.impl.nio.HttpConnectionEventHandler;
37 import org.apache.hc.core5.reactor.ProtocolIOSession;
38 import org.apache.hc.core5.reactor.ProtocolUpgradeHandler;
39 import org.apache.hc.core5.util.Args;
40
41 /**
42 * Protocol upgrade handler that upgrades the underlying {@link ProtocolIOSession}
43 * to HTTP/2 in case of a successful protocol negotiation.
44 *
45 * @since 5.2
46 */
47 @Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL)
48 @Internal
49 public class ClientH2UpgradeHandler implements ProtocolUpgradeHandler {
50
51 private final ClientH2StreamMultiplexerFactory http2StreamHandlerFactory;
52
53 public ClientH2UpgradeHandler(final ClientH2StreamMultiplexerFactory http2StreamHandlerFactory) {
54 this.http2StreamHandlerFactory = Args.notNull(http2StreamHandlerFactory, "HTTP/2 stream handler factory");
55 }
56
57 @Override
58 public void upgrade(final ProtocolIOSession ioSession, final FutureCallback<ProtocolIOSession> callback) {
59 final HttpConnectionEventHandler protocolNegotiator = new ClientH2PrefaceHandler(
60 ioSession, http2StreamHandlerFactory, true, callback);
61 ioSession.upgrade(protocolNegotiator);
62 try {
63 protocolNegotiator.connected(ioSession);
64 } catch (final IOException ex) {
65 protocolNegotiator.exception(ioSession, ex);
66 }
67 }
68
69 }