org.jgroups.demos.PartitionedHashMapDemo Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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package org.jgroups.demos;

import org.jgroups.blocks.PartitionedHashMap;
import org.jgroups.blocks.Cache;
import org.jgroups.util.Util;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
 * @author Bela Ban
 */
public class PartitionedHashMapDemo {

    public static void main(String[] args) throws Exception {
        String props="udp.xml";
        boolean migrate_data=false;

        for(int i=0; i < args.length; i++) {
            if(args[i].equals("-props")) {
                props=args[++i];
                continue;
            }
            if(args[i].equals("-migrate_data")) {
                migrate_data=true;
                continue;
            }
            help();
            return;
        }



        PartitionedHashMap map=new PartitionedHashMap<>(props, "demo-cluster");
        Cache l1_cache=new Cache<>();
        l1_cache.setMaxNumberOfEntries(5);
        l1_cache.disableReaping();
        map.setL1Cache(l1_cache);
        Cache l2_cache=map.getL2Cache();
        l2_cache.enableReaping(10000);
        map.setMigrateData(migrate_data);
        map.start();

        while(true) {
            int ch=Util.keyPress("[1] put [2] get [3] remove [4] print [q] quit");

            switch(ch) {
                case '1':
                    String key=readLine("key: ");
                    String val=readLine("val: ");
                    String caching_time=readLine("ttl: ");
                    map.put(key, val, Long.parseLong(caching_time));
                    break;
                case '2':
                    key=readLine("key: ");
                    val=map.get(key);
                    System.out.println("val = " + val);
                    break;
                case '3':
                    key=readLine("key: ");
                    map.remove(key);
                    break;
                case '4':
                    System.out.println("address: " + map.getLocalAddress());
                    System.out.println("L1 cache:\n" + map.getL1Cache());
                    System.out.println("L2 cache:\n" + map.getL2Cache());
                    break;
                case 'q':
                    l1_cache.stop();
                    map.stop();
                    return;
            }
        }

    }


    private static void help() {
        System.out.println("PartitionedHashMapDemo [-props ] [-migrate_data]");
    }

    static String readLine(String msg) {
        BufferedReader reader=null;
        String tmp=null;

        try {
            System.out.print(msg);
            System.out.flush();
            System.in.skip(System.in.available());
            reader=new BufferedReader(new InputStreamReader(System.in));
            tmp=reader.readLine().trim();
            return tmp;
        }
        catch(Exception e) {
            return null;
        }
    }


}