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Java example source code file (JdkBaseApplicationProtocolNegotiator.java)

This example Java source code file (JdkBaseApplicationProtocolNegotiator.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

exception, jdkapplicationprotocolnegotiator, jdkbaseapplicationprotocolnegotiator, jdksslengine, list, net, nofailprotocolselectionlistener, nofailprotocolselector, override, protocolselectionlistenerfactory, protocolselectorfactory, set, ssl, sslenginewrapperfactory, sslhandshakeexception, string, util

The JdkBaseApplicationProtocolNegotiator.java Java example source code

/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.handler.ssl;

import static io.netty.handler.ssl.ApplicationProtocolUtil.toList;
import static io.netty.util.internal.ObjectUtil.checkNotNull;

import java.util.Collections;
import java.util.List;
import java.util.Set;

import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLHandshakeException;

/**
 * Common base class for {@link JdkApplicationProtocolNegotiator} classes to inherit from.
 */
class JdkBaseApplicationProtocolNegotiator implements JdkApplicationProtocolNegotiator {
    private final List<String> protocols;
    private final ProtocolSelectorFactory selectorFactory;
    private final ProtocolSelectionListenerFactory listenerFactory;
    private final SslEngineWrapperFactory wrapperFactory;

    /**
     * Create a new instance.
     * @param wrapperFactory Determines which application protocol will be used by wrapping the SSLEngine in use.
     * @param selectorFactory How the peer selecting the protocol should behave.
     * @param listenerFactory How the peer being notified of the selected protocol should behave.
     * @param protocols The order of iteration determines the preference of support for protocols.
     */
    protected JdkBaseApplicationProtocolNegotiator(SslEngineWrapperFactory wrapperFactory,
            ProtocolSelectorFactory selectorFactory, ProtocolSelectionListenerFactory listenerFactory,
            Iterable<String> protocols) {
        this(wrapperFactory, selectorFactory, listenerFactory, toList(protocols));
    }

    /**
     * Create a new instance.
     * @param wrapperFactory Determines which application protocol will be used by wrapping the SSLEngine in use.
     * @param selectorFactory How the peer selecting the protocol should behave.
     * @param listenerFactory How the peer being notified of the selected protocol should behave.
     * @param protocols The order of iteration determines the preference of support for protocols.
     */
    protected JdkBaseApplicationProtocolNegotiator(SslEngineWrapperFactory wrapperFactory,
            ProtocolSelectorFactory selectorFactory, ProtocolSelectionListenerFactory listenerFactory,
            String... protocols) {
        this(wrapperFactory, selectorFactory, listenerFactory, toList(protocols));
    }

    /**
     * Create a new instance.
     * @param wrapperFactory Determines which application protocol will be used by wrapping the SSLEngine in use.
     * @param selectorFactory How the peer selecting the protocol should behave.
     * @param listenerFactory How the peer being notified of the selected protocol should behave.
     * @param protocols The order of iteration determines the preference of support for protocols.
     */
    private JdkBaseApplicationProtocolNegotiator(SslEngineWrapperFactory wrapperFactory,
            ProtocolSelectorFactory selectorFactory, ProtocolSelectionListenerFactory listenerFactory,
            List<String> protocols) {
        this.wrapperFactory = checkNotNull(wrapperFactory, "wrapperFactory");
        this.selectorFactory = checkNotNull(selectorFactory, "selectorFactory");
        this.listenerFactory = checkNotNull(listenerFactory, "listenerFactory");
        this.protocols = Collections.unmodifiableList(checkNotNull(protocols, "protocols"));
    }

    @Override
    public List<String> protocols() {
        return protocols;
    }

    @Override
    public ProtocolSelectorFactory protocolSelectorFactory() {
        return selectorFactory;
    }

    @Override
    public ProtocolSelectionListenerFactory protocolListenerFactory() {
        return listenerFactory;
    }

    @Override
    public SslEngineWrapperFactory wrapperFactory() {
        return wrapperFactory;
    }

    static final ProtocolSelectorFactory FAIL_SELECTOR_FACTORY = new ProtocolSelectorFactory() {
        @Override
        public ProtocolSelector newSelector(SSLEngine engine, Set<String> supportedProtocols) {
            return new FailProtocolSelector((JdkSslEngine) engine, supportedProtocols);
        }
    };

    static final ProtocolSelectorFactory NO_FAIL_SELECTOR_FACTORY = new ProtocolSelectorFactory() {
        @Override
        public ProtocolSelector newSelector(SSLEngine engine, Set<String> supportedProtocols) {
            return new NoFailProtocolSelector((JdkSslEngine) engine, supportedProtocols);
        }
    };

    static final ProtocolSelectionListenerFactory FAIL_SELECTION_LISTENER_FACTORY =
            new ProtocolSelectionListenerFactory() {
        @Override
        public ProtocolSelectionListener newListener(SSLEngine engine, List<String> supportedProtocols) {
            return new FailProtocolSelectionListener((JdkSslEngine) engine, supportedProtocols);
        }
    };

    static final ProtocolSelectionListenerFactory NO_FAIL_SELECTION_LISTENER_FACTORY =
            new ProtocolSelectionListenerFactory() {
        @Override
        public ProtocolSelectionListener newListener(SSLEngine engine, List<String> supportedProtocols) {
            return new NoFailProtocolSelectionListener((JdkSslEngine) engine, supportedProtocols);
        }
    };

    protected static class NoFailProtocolSelector implements ProtocolSelector {
        private final JdkSslEngine jettyWrapper;
        private final Set<String> supportedProtocols;

        public NoFailProtocolSelector(JdkSslEngine jettyWrapper, Set<String> supportedProtocols) {
            this.jettyWrapper = jettyWrapper;
            this.supportedProtocols = supportedProtocols;
        }

        @Override
        public void unsupported() {
            jettyWrapper.getSession().setApplicationProtocol(null);
        }

        @Override
        public String select(List<String> protocols) throws Exception {
            for (String p : supportedProtocols) {
                if (protocols.contains(p)) {
                    jettyWrapper.getSession().setApplicationProtocol(p);
                    return p;
                }
            }
            return noSelectMatchFound();
        }

        public String noSelectMatchFound() throws Exception {
            jettyWrapper.getSession().setApplicationProtocol(null);
            return null;
        }
    }

    protected static final class FailProtocolSelector extends NoFailProtocolSelector {
        public FailProtocolSelector(JdkSslEngine jettyWrapper, Set<String> supportedProtocols) {
            super(jettyWrapper, supportedProtocols);
        }

        @Override
        public String noSelectMatchFound() throws Exception {
            throw new SSLHandshakeException("Selected protocol is not supported");
        }
    }

    protected static class NoFailProtocolSelectionListener implements ProtocolSelectionListener {
        private final JdkSslEngine jettyWrapper;
        private final List<String> supportedProtocols;

        public NoFailProtocolSelectionListener(JdkSslEngine jettyWrapper, List<String> supportedProtocols) {
            this.jettyWrapper = jettyWrapper;
            this.supportedProtocols = supportedProtocols;
        }

        @Override
        public void unsupported() {
            jettyWrapper.getSession().setApplicationProtocol(null);
        }

        @Override
        public void selected(String protocol) throws Exception {
            if (supportedProtocols.contains(protocol)) {
                jettyWrapper.getSession().setApplicationProtocol(protocol);
            } else {
                noSelectedMatchFound(protocol);
            }
        }

        public void noSelectedMatchFound(String protocol) throws Exception {
        }
    }

    protected static final class FailProtocolSelectionListener extends NoFailProtocolSelectionListener {
        public FailProtocolSelectionListener(JdkSslEngine jettyWrapper, List<String> supportedProtocols) {
            super(jettyWrapper, supportedProtocols);
        }

        @Override
        public void noSelectedMatchFound(String protocol) throws Exception {
            throw new SSLHandshakeException("No compatible protocols found");
        }
    }
}

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