LegmanModule.java

/*
 * Copyright (C) 2013 Sebastian Sdorra
 *
 * 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.github.legman.guice;

//~--- non-JDK imports --------------------------------------------------------

import com.github.legman.EventBus;

import com.google.inject.AbstractModule;
import com.google.inject.TypeLiteral;
import com.google.inject.matcher.Matchers;
import com.google.inject.spi.InjectionListener;
import com.google.inject.spi.TypeEncounter;
import com.google.inject.spi.TypeListener;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author Sebastian Sdorra
 * @since 1.0.0
 */
public class LegmanModule extends AbstractModule
{
  
  /**
   * the logger for LegmanModule
   */
  private static final Logger logger = LoggerFactory.getLogger(
    LegmanModule.class);
  
  public LegmanModule(EventBus eventBus)
  {
    this.eventBus = eventBus;
  }
  
  @Override
  protected void configure()
  {
    bindListener(Matchers.any(), new TypeListener()
    {

      @Override
      public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter)
      {
        encounter.register(new InjectionListener<I>()
        {

          @Override
          public void afterInjection(I injectee)
          {
            if ( logger.isTraceEnabled() )
            {
              Class<?> clazz = injectee.getClass();
              logger.trace("register subscriber {}", clazz);
            }
            eventBus.register(injectee);
          }
        });
      }
      
    });
  }
  
  private final EventBus eventBus;
}