/*******************************************************************************
* * Copyright 2012 Impetus Infotech.
* *
* * 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.impetus.client.twitter.dao;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Query;
import com.impetus.client.twitter.entities.ExternalLinkRDBMS;
import com.impetus.client.twitter.entities.PreferenceRDBMS;
import com.impetus.client.twitter.entities.TweetRDBMS;
import com.impetus.client.twitter.entities.UserRDBMS;
/**
* Data access object class for implementation of twitter.
*
* @author amresh.singh
*/
public class TwitterService extends SuperDao implements Twitter
{
private EntityManager em;
private EntityManagerFactory emf;
private String pu;
public TwitterService(String persistenceUnitName)
{
this.pu = persistenceUnitName;
if (emf == null)
{
try
{
emf = createEntityManagerFactory(persistenceUnitName);
}
catch (Exception e)
{
}
}
}
@Override
public void createEntityManager()
{
if (em == null)
{
em = emf.createEntityManager();
}
}
@Override
public void closeEntityManager()
{
if (em != null)
{
em.close();
em = null;
}
}
@Override
public void close()
{
if (emf != null)
{
emf.close();
}
}
@Override
public void addUser(UserRDBMS user)
{
em.persist(user);
}
@Override
public void addUser(String userId, String name, String password, String relationshipStatus)
{
UserRDBMS user = new UserRDBMS(userId, name, password, relationshipStatus);
em.persist(user);
}
@Override
public void savePreference(String userId, PreferenceRDBMS preference)
{
UserRDBMS user = em.find(UserRDBMS.class, userId);
user.setPreference(preference);
em.persist(user);
}
@Override
public void addExternalLink(String userId, String linkId, String linkType, String linkAddress)
{
UserRDBMS user = em.find(UserRDBMS.class, userId);
user.addExternalLink(new ExternalLinkRDBMS(linkId, linkType, linkAddress));
em.persist(user);
}
@Override
public void addTweet(String userId, String tweetBody, String device)
{
UserRDBMS user = em.find(UserRDBMS.class, userId);
user.addTweet(new TweetRDBMS(tweetBody, device));
em.persist(user);
}
@Override
public void startFollowing(String userId, String friendUserId)
{
UserRDBMS user = em.find(UserRDBMS.class, userId);
UserRDBMS friend = em.find(UserRDBMS.class, friendUserId);
user.addFriend(friend);
em.persist(user);
friend.addFollower(user);
em.persist(friend);
}
@Override
public void addFollower(String userId, String followerUserId)
{
UserRDBMS user = em.find(UserRDBMS.class, userId);
UserRDBMS follower = em.find(UserRDBMS.class, followerUserId);
user.addFollower(follower);
em.persist(user);
}
@Override
public UserRDBMS findUserById(String userId)
{
UserRDBMS user = em.find(UserRDBMS.class, userId);
return user;
}
@Override
public void removeUser(UserRDBMS user)
{
em.remove(user);
}
@Override
public void mergeUser(UserRDBMS user)
{
em.merge(user);
}
@Override
public List<UserRDBMS> getAllUsers()
{
Query q = em.createQuery("select u from UserRDBMS u");
List<UserRDBMS> users = q.getResultList();
return users;
}
@Override
public List<TweetRDBMS> getAllTweets(String userId)
{
Query q = em.createQuery("select u from UserRDBMS u where u.userId =:userId");
q.setParameter("userId", userId);
List<UserRDBMS> users = q.getResultList();
if (users == null || users.isEmpty())
{
return null;
}
else
{
return users.get(0).getTweets();
}
}
@Override
public List<UserRDBMS> getFollowers(String userId)
{
Query q = em.createQuery("select u from UserRDBMS u where u.userId =:userId");
q.setParameter("userId", userId);
List<UserRDBMS> users = q.getResultList();
if (users == null || users.isEmpty())
{
return null;
}
return users.get(0).getFollowers();
}
@Override
public List<TweetRDBMS> findTweetByBody(String tweetBody)
{
Query q = em.createQuery("select u.tweet_body from UserRDBMS u where u.tweet_body like :body");
q.setParameter("body", tweetBody);
List<TweetRDBMS> tweets = q.getResultList();
return tweets;
}
@Override
public List<TweetRDBMS> findTweetByDevice(String deviceName)
{
Query q = em.createQuery("select u.tweeted_from from UserRDBMS u where u.tweeted_from like :device");
q.setParameter("device", deviceName);
List<TweetRDBMS> tweets = q.getResultList();
return tweets;
}
}