Guice sample

CommandsBindingModule.java

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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ua.kpi.acts.samuel.agent.inject.modules;

import com.google.inject.AbstractModule;
import com.google.inject.multibindings.MapBinder;
import java.util.Set;
import org.reflections.Reflections;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ua.kpi.acts.samuel.agent.commands.api.CommandName;
import ua.kpi.acts.samuel.agent.commands.api.ICommand;

/**
 *
 * @author Artur
 */
public class CommandsBindingModule extends AbstractModule
{
    private final Logger log = LoggerFactory.getLogger(getClass());
    @Override
    public void configure() {
        MapBinder<String, ICommand> mapBinder = MapBinder.newMapBinder(binder(), String.class, ICommand.class);

        log.info("Fetching all exiting commands implementations");
        // Go through all command names
        Reflections reflections = new Reflections("ua.kpi.acts.samuel.agent.commands.impl");

        // load all classes-commands in project to memory
        Set<Class<?>> annotated =
                (Set<Class<?>>) reflections.getTypesAnnotatedWith(CommandName.class);
        log.info("Found "+annotated.size()+" commands");

        // fill commands classes and its names hash map
        for (Class<?> aClass : annotated) {
            String commandName = aClass.getAnnotation(CommandName.class).value(); // read the annotation value
            @SuppressWarnings("unchecked")
            Class<ICommand> command = (Class<ICommand>) aClass;

            mapBinder.addBinding(commandName).to(command);
        }
    }
}

MainAgent.java

package ua.kpi.acts.samuel.agent;

import com.google.inject.Guice;
import com.google.inject.Injector;
import java.io.IOException;

import ua.kpi.acts.samuel.agent.inject.modules.CommandsBindingModule;
import ua.kpi.acts.samuel.agent.inject.modules.MainBindingModule;
import ua.kpi.acts.samuel.agent.inject.modules.StorageBindingModule;

/**
 * Created by Anton Goi on 30.10.2014.
 *
 * When somebody builds WHOLE project, don't forget to COMMENT @Test ALL
 * annotations in ActiveMQTest.java
 */
public class MainAgent {

    //    private static final Logger log = LoggerFactory.getLogger(ActiveMQ.class);
    public static void main(String[] args) throws IOException, Exception {
        Injector injector = Guice.createInjector(
                new MainBindingModule(),
                new CommandsBindingModule(),
                new StorageBindingModule()
        );
        AgentExecutor agentExecutor = injector.getInstance(AgentExecutor.class);
        //AgentExecuter agentExecuter = new AgentExecuter(SingletonInstanceCreator.getSingletonInstance(ICommunication.class),
        //                    SingletonInstanceCreator.getSingletonInstance(IStorage.class),
        //                    SingletonInstanceCreator.getSingletonInstance(IScheduler.class));
        agentExecutor.execute(args);
    }
}

MainBindingModule.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
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 */
package ua.kpi.acts.samuel.agent.inject.modules;

import com.google.inject.AbstractModule;
import com.google.inject.Binder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ua.kpi.acts.samuel.agent.commands.execution.CommandFactory;
import ua.kpi.acts.samuel.agent.commands.execution.ICommandFactory;
import ua.kpi.acts.samuel.agent.communication.ICommunication;
import ua.kpi.acts.samuel.agent.communication.impl.activemq.ActiveMqCommunication;
import ua.kpi.acts.samuel.agent.monitoring.IMonitoringCommandExecutor;
import ua.kpi.acts.samuel.agent.monitoring.impl.MonitoringCommandExecutor;
import ua.kpi.acts.samuel.agent.scheduler.AgentScheduler;
import ua.kpi.acts.samuel.agent.scheduler.IScheduler;
import ua.kpi.acts.samuel.agent.config.IConfigRetriever;
import ua.kpi.acts.samuel.agent.config.JsonAgentConfigRetriever;

/**
 *
 * @author Serhiy Vaschilin
 */
public class MainBindingModule extends AbstractModule {

    private final Logger log = LoggerFactory.getLogger(getClass());

    /**
     * Configures a {@link Binder} via the exposed methods.
     */
    @Override
    protected void configure() {
        bind(ICommunication.class).to(ActiveMqCommunication.class);
        bind(IScheduler.class).to(AgentScheduler.class);
        bind(IConfigRetriever.class).to(JsonAgentConfigRetriever.class);
        bind(IMonitoringCommandExecutor.class).to(MonitoringCommandExecutor.class);
        bind(ICommandFactory.class).to(CommandFactory.class);
    }
}