Main.java

/*
 * 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 com.facebook.presto;

import com.google.inject.Binder;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Module;
import com.google.inject.Scopes;
import com.google.inject.multibindings.MapBinder;
import org.weakref.jmx.guice.ExportBinder;

import javax.inject.Inject;

import java.util.Arrays;
import java.util.Map;

public class Main
{
    public static void main(String[] args)
    {
        Injector injector = Guice.createInjector(new Module()
        {
            @Override
            public void configure(Binder binder)
            {
                ExportBinder exportBinder = ExportBinder.newExporter(binder);

                MapBinder<String, Stats> mapBinder = MapBinder.newMapBinder(binder, String.class, Stats.class);

                int i = 0;
                for (Class<? extends Stats> clazz : Arrays.asList(Stats1.class, Stats2.class, Stats3.class)) {
                    binder.bind(clazz).in(Scopes.SINGLETON);
                    mapBinder.addBinding("stats" + i).to(Stats1.class);
                    exportBinder.export(clazz).withGeneratedName();
                    i++;
                }

                binder.bind(Updater1.class).in(Scopes.SINGLETON);
                binder.bind(Updater2.class).in(Scopes.SINGLETON);

                binder.bind(Reporter.class).in(Scopes.SINGLETON);
            }
        });

        Reporter reporter = injector.getInstance(Reporter.class);
    }


    public static interface Stats
    {
    }

    public static class Stats1 implements Stats {}
    public static class Stats2 implements Stats {}
    public static class Stats3 implements Stats {}

    public static class Updater1
    {
        @Inject
        public Updater1(Stats1 stats) {}
    }

    public static class Updater2
    {
        @Inject
        public Updater2(Stats2 stats2, Stats3 stats3) {}
    }

    public static class Reporter
    {
        @Inject
        public Reporter(Map<String, Stats> stats)
        {
            System.out.println(stats);
        }
    }
}