OpenSslSessionStats.java — netty Source File

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:
 *
 *   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.ssl;

import io.netty.internal.tcnative.SSLContext;

import java.util.concurrent.locks.Lock;

/**
 * Stats exposed by an OpenSSL session context.
 *
 * @see <a href="https://www.openssl.org/docs/manmaster/man3/SSL_CTX_sess_number.html">SSL_CTX_sess_number</a>
 */
public final class OpenSslSessionStats {

    private final ReferenceCountedOpenSslContext context;

    // IMPORTANT: We take the OpenSslContext and not just the long (which points the native instance) to prevent
    //            the GC to collect OpenSslContext as this would also free the pointer and so could result in a
    //            segfault when the user calls any of the methods here that try to pass the pointer down to the native
    //            level.
    OpenSslSessionStats(ReferenceCountedOpenSslContext context) {
        this.context = context;
    }

    /**
     * Returns the current number of sessions in the internal session cache.
     */
    public long number() {
        Lock readerLock = context.ctxLock.readLock();
        readerLock.lock();
        try {
            return SSLContext.sessionNumber(context.ctx);
        } finally {
            readerLock.unlock();
        }
    }

    /**
     * Returns the number of started SSL/TLS handshakes in client mode.
     */
    public long connect() {
        Lock readerLock = context.ctxLock.readLock();
        readerLock.lock();
        try {
            return SSLContext.sessionConnect(context.ctx);
// ... (194 more lines)