BridgeRequestScopeCache.java

/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2012, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.portletbridge.bridge.scope;

import org.jboss.portletbridge.util.LRUMap;

/**
 * Least Recently Used (LRU) Cache of {@link BridgeRequestScope} objects in Bridge.
 *
 * @author kenfinnigan
 */
public class BridgeRequestScopeCache extends LRUMap<String, BridgeRequestScope> {

    private static final long serialVersionUID = 3063840061349901306L;

    public BridgeRequestScopeCache(int maxCapacity) {
        super(maxCapacity);
    }

    @Override
    protected boolean removeEldestEntry(java.util.Map.Entry<String, BridgeRequestScope> eldest) {
        if (super.removeEldestEntry(eldest)) {
            // Manually remove entry from Map
            BridgeRequestScope scope = super.remove(eldest.getKey());

            // As per JSR-329 6.8.2, clear() will call preDestroy() on Objects in Scope
            scope.clear();
        }
        return false;
    }

}