BroadcastSubscriptionSet.java

/* Copyright (c) 2011 Danish Maritime Authority.
 *
 * Licensed 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
 *
 *     http://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 net.maritimecloud.mms.server.broadcast;

import static java.util.Objects.requireNonNull;

import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArrayList;

import net.maritimecloud.internal.util.concurrent.CustomConcurrentHashMap;
import net.maritimecloud.internal.util.concurrent.CustomConcurrentHashMap.Strength;
import net.maritimecloud.mms.server.connection.client.Session;
import net.maritimecloud.util.geometry.Area;
import net.maritimecloud.util.geometry.Position;

/**
 *
 * @author Kasper Nielsen
 */
class BroadcastSubscriptionSet {
    final CustomConcurrentHashMap<Session, CopyOnWriteArrayList<Area>> c = new CustomConcurrentHashMap<>(Strength.weak,
            Strength.strong);

    Set<Session> find(Position position) {
        for (Entry<Session, CopyOnWriteArrayList<Area>> e : c.entrySet()) {
            Session c = e.getKey();
            if (c != null) {
                // for (Area area : e.getValue()) {}
            }
        }
        return null;
    }

    void add(Session connection, Area a) {
        requireNonNull(a);
        CopyOnWriteArrayList<Area> l = c.get(connection);
        if (l == null) {
            c.putIfAbsent(connection, new CopyOnWriteArrayList<Area>());
            l = c.get(connection);
        }
        l.add(a);
    }

}