1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package org.conscrypt;
18
19import javax.net.ssl.SSLSession;
20
21/**
22 * A persistent {@link javax.net.ssl.SSLSession} cache used by
23 * {@link javax.net.ssl.SSLSessionContext} to share server-side SSL sessions
24 * across processes. For example, this cache enables one server to resume
25 * a session started by a different server based on a session ID provided
26 * by the client.
27 *
28 * <p>The {@code SSLSessionContext} implementation converts
29 * {@code SSLSession}s into raw bytes and vice versa. The exact makeup of the
30 * session data is dependent upon the caller's implementation and is opaque to
31 * the {@code SSLServerSessionCache} implementation.
32 */
33interface SSLServerSessionCache {
34    /**
35     * Gets the session data for given session ID.
36     *
37     * @param id from {@link javax.net.ssl.SSLSession#getId()}
38     * @return the session data or null if none is cached
39     * @throws NullPointerException if id is null
40     */
41    byte[] getSessionData(byte[] id);
42
43    /**
44     * Stores session data for the given session.
45     *
46     * @param session to cache data for
47     * @param sessionData to cache
48     * @throws NullPointerException if session or data is null
49     */
50    void putSessionData(SSLSession session, byte[] sessionData);
51}