QuicClientSessionCache.java — netty Source File

Source Code

/*
 * Copyright 2021 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:
 *
 *   https://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.codec.quic;

import io.netty.util.AsciiString;
import io.netty.util.internal.SystemPropertyUtil;
import org.jetbrains.annotations.Nullable;

import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;

final class QuicClientSessionCache {

    private static final int DEFAULT_CACHE_SIZE;
    static {
        // Respect the same system property as the JDK implementation to make it easy to switch between implementations.
        int cacheSize = SystemPropertyUtil.getInt("javax.net.ssl.sessionCacheSize", 20480);
        if (cacheSize >= 0) {
            DEFAULT_CACHE_SIZE = cacheSize;
        } else {
            DEFAULT_CACHE_SIZE = 20480;
        }
    }

    private final AtomicInteger maximumCacheSize = new AtomicInteger(DEFAULT_CACHE_SIZE);

    // Let's use the same default value as OpenSSL does.
    // See https://www.openssl.org/docs/man1.1.1/man3/SSL_get_default_timeout.html
    private final AtomicInteger sessionTimeout = new AtomicInteger(300);
    private int sessionCounter;

    private final Map<HostPort, SessionHolder> sessions =
            new LinkedHashMap<HostPort, SessionHolder>() {

                private static final long serialVersionUID = -7773696788135734448L;

                @Override
                protected boolean removeEldestEntry(Map.Entry<HostPort, SessionHolder> eldest) {
                    int maxSize = maximumCacheSize.get();
                    return maxSize >= 0 && size() > maxSize;
                }
            };

    void saveSession(@Nullable String host, int port, long creationTime, long timeout, byte[] session,
                     boolean isSingleUse) {
// ... (187 more lines)