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The Adobe Experience Manager SDK

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// 
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// 
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
// 
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// 
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
// 
package org.eclipse.jetty.server.session;

import java.util.function.Function;
import javax.servlet.http.HttpServletRequest;

/**
 *  NullSessionCache
 *
 *  Does not actually cache any Session objects. Useful for testing.
 *  Also useful if you do not want to share Session objects with the same id between
 *  simultaneous requests: note that this means that context forwarding can't share
 *  the same id either.
 *
 * @deprecated The Eclipse Jetty and Apache Felix Http Jetty packages are no longer supported.
 */
@Deprecated(since = "2021-05-27")
public class NullSessionCache extends AbstractSessionCache {

    /**
     * @param handler The SessionHandler related to this SessionCache
     */
    public NullSessionCache(SessionHandler handler) {
        super(handler);
        super.setEvictionPolicy(EVICT_ON_SESSION_EXIT);
    }

    @Override
    public void shutdown() {
    }

    @Override
    public Session newSession(SessionData data) {
        return new Session(getSessionHandler(), data);
    }

    @Override
    public Session newSession(HttpServletRequest request, SessionData data) {
        return new Session(getSessionHandler(), request, data);
    }

    @Override
    public Session doGet(String id) {
        // do not cache anything
        return null;
    }

    @Override
    public Session doPutIfAbsent(String id, Session session) {
        // nothing was stored previously
        return null;
    }

    @Override
    public boolean doReplace(String id, Session oldValue, Session newValue) {
        // always accept new value
        return true;
    }

    @Override
    public Session doDelete(String id) {
        return null;
    }

    @Override
    public void setEvictionPolicy(int evictionTimeout) {
        if (LOG.isDebugEnabled())
            LOG.debug("Ignoring eviction setting: {}", evictionTimeout);
    }

    @Override
    protected Session doComputeIfAbsent(String id, Function mappingFunction) {
        return mappingFunction.apply(id);
    }
}