HazMain

/*
 * Copyright (c) 2008-2015, Hazelcast, Inc. All Rights Reserved.
 *
 * 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 coh;

import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.IMap;
import com.hazelcast.query.PagingPredicate;
import com.hazelcast.query.Predicate;
import com.hazelcast.query.impl.QueryEntry;

import java.io.Serializable;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

/**
 * TODO add a proper JavaDoc
 */
public class HazMain {

    public static final int DATA_COUNT = 200 * 100;

    static IMap m;
    static MyComparator comparator;
    static PagingPredicate pagingPredicate;


    public static void main(String[] args) {
        Hazelcast.newHazelcastInstance();
        Hazelcast.newHazelcastInstance();
        HazelcastInstance instance = Hazelcast.newHazelcastInstance();
        m = instance.getMap("m");

        for (int i = 0; i < HazMain.DATA_COUNT; i++) {
            if (i % 25000 == 0) {
                System.err.println("asd i: " + i);
            }
            m.put(i, i);
        }
        System.err.println("fatal data filled !!!");

        sleepSeconds(2);
        comparator = new MyComparator();
        MyPredicate predicate = new MyPredicate();
        pagingPredicate = new PagingPredicate(predicate, comparator, 50);

        getPage(0);
        getPage(1);
        getPage(2);
        getPage(10);
        getPage(50);

        getPage(1500);

    }

    static void getPage(int page) {
        pagingPredicate.setPage(page);
        long begin = System.nanoTime();
        Collection values = m.values(pagingPredicate);
        long elapsed = System.nanoTime() - begin;
        System.err.println("fatal page: " + page + " elapsed : " + (elapsed / 1000000));
        printSet(values);
    }

    static void printSet(Collection values) {
        for (Object o : values) {
            System.err.println("qwe \t " + o);
        }
        System.err.println("");
    }

    static void sleepSeconds(int seconds) {
        try {
            Thread.sleep(seconds * 1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public static class MyPredicate implements Predicate, Serializable {

        public MyPredicate() {
        }

        public boolean apply(Map.Entry mapEntry) {
            return true;
        }
    }

    public static class MyComparator implements Comparator, Serializable {

        public int compare(Object o1, Object o2) {
            Comparable v1 = (Comparable) ((Map.Entry) o1).getValue();
            Comparable v2 = (Comparable) ((Map.Entry) o2).getValue();
            return (v1).compareTo(v2);
        }
    }
}