/*

 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

/*

 *

 *  (C) Copyright IBM Corp. 1999 All Rights Reserved.

 *  Copyright 1997 The Open Group Research Institute.  All rights reserved.

 */

package sun.security.krb5.internal.rcache;

import java.util.Map;

import java.util.concurrent.ConcurrentHashMap;

import sun.security.krb5.internal.KerberosTime;

import sun.security.krb5.internal.KrbApErrException;

import sun.security.krb5.internal.ReplayCache;

/**

 * This class stores replay caches. AuthTimeWithHash objects are categorized

 * into AuthLists keyed by the names of client and server.

 *

 * @author Yanni Zhang

 */

public class MemoryCache extends ReplayCache {

    // TODO: One day we'll need to read dynamic krb5.conf.

    private static final int lifespan = KerberosTime.getDefaultSkew();

    private static final boolean DEBUG = sun.security.krb5.internal.Krb5.DEBUG;

    private final Map<String,AuthList> content = new ConcurrentHashMap<>();

    @Override

    public synchronized void checkAndStore(KerberosTime currTime, AuthTimeWithHash time)

            throws KrbApErrException {

        String key = time.client + "|" + time.server;

        content.computeIfAbsent(key, k -> new AuthList(lifespan))

                .put(time, currTime);

        if (DEBUG) {

            System.out.println("MemoryCache: add " + time + " to " + key);

        }

        // TODO: clean up AuthList entries with only expired AuthTimeWithHash objects.

    }

    public String toString() {

        StringBuilder sb = new StringBuilder();

        for (AuthList rc: content.values()) {

            sb.append(rc.toString());

        }

        return sb.toString();

    }

}