Examples with PersistenceException cn.edu.zju.acm.onlinejudge.persistence.PersistenceException used on opensource projects

Example 16 with PersistenceException

use of cn.edu.zju.acm.onlinejudge.persistence.PersistenceException in project zoj by licheng.

the class ForumPersistenceImpl method deletePost.

/**
     * <p>
     * Deletes the specified post in persistence layer.
     * </p>
     * 
     * @param id
     *            the id of the post to delete
     * @param user
     *            the id of the user who made this modification
     * @throws PersistenceException
     *             wrapping a persistence implementation specific exception
     */
public void deletePost(long id, long user) throws PersistenceException {
    Connection conn = null;
    try {
        conn = Database.createConnection();
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(ForumPersistenceImpl.DELETE_POST);
            ps.setLong(1, user);
            ps.setTimestamp(2, new Timestamp(new Date().getTime()));
            ps.setLong(3, id);
            if (ps.executeUpdate() == 0) {
                throw new PersistenceException("no such post");
            }
        } finally {
            Database.dispose(ps);
        }
    } catch (PersistenceException pe) {
        throw pe;
    } catch (SQLException e) {
        throw new PersistenceException("Failed to delete post.", e);
    } finally {
        Database.dispose(conn);
    }
}

Example 17 with PersistenceException

use of cn.edu.zju.acm.onlinejudge.persistence.PersistenceException in project zoj by licheng.

the class ForumPersistenceImpl method createPost.

/**
     * <p>
     * Creates the specified post in persistence layer.
     * </p>
     * 
     * @param post
     *            the Post instance to create
     * @param user
     *            the id of the user who made this modification
     * @throws NullPointerException
     *             if argument is null
     * @throws PersistenceException
     *             wrapping a persistence implementation specific exception
     */
public void createPost(Post post, long user) throws PersistenceException {
    Connection conn = null;
    try {
        conn = Database.createConnection();
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(ForumPersistenceImpl.INSERT_POST);
            ps.setLong(1, post.getThreadId());
            ps.setLong(2, post.getUserProfileId());
            ps.setString(3, post.getContent());
            ps.setLong(4, user);
            ps.setTimestamp(5, new Timestamp(new Date().getTime()));
            ps.setLong(6, user);
            ps.setTimestamp(7, new Timestamp(new Date().getTime()));
            ps.executeUpdate();
            ps = conn.prepareStatement(ForumPersistenceImpl.GET_LAST_ID);
            ResultSet rs = ps.executeQuery();
            rs.next();
            post.setId(rs.getLong(1));
        } finally {
            Database.dispose(ps);
        }
    } catch (SQLException e) {
        throw new PersistenceException("Failed to create post.", e);
    } finally {
        Database.dispose(conn);
    }
}

Example 18 with PersistenceException

use of cn.edu.zju.acm.onlinejudge.persistence.PersistenceException in project zoj by licheng.

the class ForumPersistenceImpl method getPosts.

/**
     * <p>
     * Gets all posts in the specified thread from persistence layer.
     * </p>
     * 
     * @param threadId
     *            the id of the thread
     * @param offset
     *            the offset of the start position to get the posts
     * @param count
     *            the maximum number of posts in returned list
     * @return a list of Post instances containing all posts in the specified thread
     * @throws IllegalArgumentException
     *             if offset or count is negative
     * @throws PersistenceException
     *             wrapping a persistence implementation specific exception
     */
public List<Post> getPosts(long threadId, int offset, int count) throws PersistenceException {
    if (offset < 0) {
        throw new IllegalArgumentException("offset should not be negative");
    }
    if (count < 0) {
        throw new IllegalArgumentException("count should not be negative");
    }
    if (count == 0) {
        return new ArrayList<Post>();
    }
    Connection conn = null;
    ResultSet rs = null;
    try {
        conn = Database.createConnection();
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(ForumPersistenceImpl.GET_POSTS);
            ps.setLong(1, threadId);
            rs = ps.executeQuery();
            List<Post> posts = new ArrayList<Post>();
            int index = 0;
            while (rs.next() && index - offset < count) {
                ++index;
                if (index > offset) {
                    Post post = new Post();
                    post.setId(rs.getLong(DatabaseConstants.POST_POST_ID));
                    post.setThreadId(rs.getLong(DatabaseConstants.POST_THREAD_ID));
                    post.setUserProfileId(rs.getLong(DatabaseConstants.POST_USER_PROFILE_ID));
                    post.setContent(rs.getString(DatabaseConstants.POST_CONTENT));
                    posts.add(post);
                }
            }
            return posts;
        } finally {
            Database.dispose(ps);
        }
    } catch (SQLException e) {
        throw new PersistenceException("Failed to get the posts", e);
    } finally {
        Database.dispose(conn);
    }
}

Example 19 with PersistenceException

use of cn.edu.zju.acm.onlinejudge.persistence.PersistenceException in project zoj by licheng.

the class ForumPersistenceImpl method getThread.

/**
     * <p>
     * Get the thread with given id in persistence layer.
     * </p>
     * 
     * @param id
     *            the id of the thread
     * @return the thread with given id in persistence layer
     * @throws PersistenceException
     *             wrapping a persistence implementation specific exception
     */
public Thread getThread(long id) throws PersistenceException {
    Connection conn = null;
    try {
        conn = Database.createConnection();
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(ForumPersistenceImpl.GET_THREAD);
            ps.setLong(1, id);
            ResultSet rs = ps.executeQuery();
            if (rs.next()) {
                Thread thread = new Thread();
                thread.setId(rs.getLong(DatabaseConstants.THREAD_THREAD_ID));
                thread.setForumId(rs.getLong(DatabaseConstants.THREAD_FORUM_ID));
                thread.setUserProfileId(rs.getLong(DatabaseConstants.THREAD_USER_PROFILE_ID));
                thread.setTitle(rs.getString(DatabaseConstants.THREAD_TITLE));
                return thread;
            } else {
                return null;
            }
        } finally {
            Database.dispose(ps);
        }
    } catch (SQLException e) {
        throw new PersistenceException("Failed to get the thread with id " + id, e);
    } finally {
        Database.dispose(conn);
    }
}

Example 20 with PersistenceException

use of cn.edu.zju.acm.onlinejudge.persistence.PersistenceException in project zoj by licheng.

the class ForumPersistenceImpl method getAllForums.

/**
     * <p>
     * Get all forums in persistence layer.
     * </p>
     * 
     * @return a list of Forum instances containing all forums in persistence layer
     * @throws PersistenceException
     *             wrapping a persistence implementation specific exception
     */
public List<Forum> getAllForums() throws PersistenceException {
    Connection conn = null;
    try {
        conn = Database.createConnection();
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(ForumPersistenceImpl.GET_ALL_FORUMS);
            ResultSet rs = ps.executeQuery();
            List<Forum> forums = new ArrayList<Forum>();
            while (rs.next()) {
                Forum forum = new Forum();
                forum.setId(rs.getLong(DatabaseConstants.FORUM_FORUM_ID));
                forum.setName(rs.getString(DatabaseConstants.FORUM_NAME));
                forum.setDescription(rs.getString(DatabaseConstants.FORUM_DESCRIPTION));
                forums.add(forum);
            }
            return forums;
        } finally {
            Database.dispose(ps);
        }
    } catch (SQLException e) {
        throw new PersistenceException("Failed to get all forums", e);
    } finally {
        Database.dispose(conn);
    }
}