SpitterServiceImpl.java

package com.john.springinaction.service;

import static java.lang.Math.*;
import static java.util.Collections.*;

import java.util.Date;
import java.util.List;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.john.springinaction.domain.Spitter;
import com.john.springinaction.domain.Spittle;
import com.john.springinaction.persistence.SpitterDao;


@Service("spitterService")
@Transactional(propagation=Propagation.REQUIRED)
public class SpitterServiceImpl implements SpitterService {
	
	@Resource(name = "spitterDao")
	private SpitterDao spitterDao;
	
	  public void saveSpittle(Spittle spittle) {
	    spittle.setWhen(new Date());
	    spitterDao.saveSpittle(spittle);
	  }
	
	  @Transactional(propagation=Propagation.SUPPORTS, readOnly=true)
	  public List<Spittle> getRecentSpittles(int count) {
	    List<Spittle> recentSpittles = 
	        spitterDao.getRecentSpittle();
	    
	    reverse(recentSpittles);
	    
	    return recentSpittles.subList(0, 
	            min(49, recentSpittles.size()));
	  }
	  
	  public void saveSpitter(Spitter spitter) {
	    if(spitter.getId() == null) {
	      spitterDao.addSpitter(spitter);
	    } else {
	      spitterDao.saveSpitter(spitter);
	    }
	  }
	  
	  @Transactional(propagation=Propagation.SUPPORTS, readOnly=true)
	  public Spitter getSpitter(long id) {
	    return spitterDao.getSpitterById(id);
	  }
	
	  public void startFollowing(Spitter follower, Spitter followee) {
	    // TODO Auto-generated method stub  
	  }
	  
	  public List<Spittle> getSpittlesForSpitter(Spitter spitter) {
	    return spitterDao.getSpittlesForSpitter(spitter);
	  }
	
	  public List<Spittle> getSpittlesForSpitter(String username) {
	    Spitter spitter = spitterDao.getSpitterByUsername(username);
	    return getSpittlesForSpitter(spitter);
	  }
	
	  public Spitter getSpitter(String username) {
	    return spitterDao.getSpitterByUsername(username);
	  }
	
	  public void deleteSpittle(long id) {
	    spitterDao.deleteSpittle(id);
	  }
	  
	  public List<Spitter> getAllSpitters() {
	    return spitterDao.findAllSpitters();
	  }
	
	  public Spittle getSpittleById(long id) {
	    return spitterDao.getSpittleById(id);
	  }
}