org.obp.remote.RemoteObpLocator.java Source code

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Here is the source code for org.obp.remote.RemoteObpLocator.java

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/*
 * Copyright 2013-2014 MARSEC-XL International Limited
 *
 * 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 org.obp.remote;

import org.apache.log4j.Logger;
import org.obp.ObpInstance;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.CopyOnWriteArrayList;

/**
 * Created by Robert Jaremczak
 * Date: 2013-12-17
 */

@Service
public class RemoteObpLocator {

    private Logger logger = Logger.getLogger(RemoteObpLocator.class);

    private ConcurrentMap<UUID, RemoteObpInstance> remoteInstances;
    private List<ObpInstance> remotes;

    public RemoteObpLocator() {
        remotes = new CopyOnWriteArrayList<>();
        remoteInstances = new ConcurrentHashMap<>();
    }

    private void updateRemote(RemoteObpInstance remoteObpInstance) {

    }

    private int calculateBeingInformedRank(ObpInstance obpInstance) {
        return obpInstance.knownRemotes() + (obpInstance.isHub() ? 1000000 : 0);
    }

    public ObpInstance bestInformedRemote() {
        int bestRank = 0;
        ObpInstance bestInstance = null;

        for (ObpInstance instance : remotes) {
            int rank = calculateBeingInformedRank(instance);
            if (rank > bestRank) {
                bestInstance = instance;
                bestRank = rank;
            }
        }

        return bestInstance;
    }

    public int knownRemotes() {
        return remotes.size();
    }
}