threaddaoimpljdbc.java

java servlet著名论坛源代码

     */
    public void updateTopic_Body_Icon(int threadID, // primary key
                        String threadTopic, String threadBody, String threadIcon)
        throws ObjectNotFoundException, DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("UPDATE " + TABLE_NAME + " SET ThreadTopic = ?, ThreadBody = ?, ThreadIcon = ?");
        sql.append(" WHERE ThreadID = ?");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());

            // // column(s) to update
            statement.setString(1, threadTopic);
            if (DBUtils.getDatabaseType() == DBUtils.DATABASE_ORACLE) {
                statement.setCharacterStream(2, new StringReader(threadBody), threadBody.length());
            } else {
                statement.setString(2, threadBody);
            }
            statement.setString(3, threadIcon);

            // primary key column(s)
            statement.setInt(4, threadID);

            if (statement.executeUpdate() != 1) {
                throw new ObjectNotFoundException("Cannot update table Thread where primary key = (" + threadID + ").");
            }
            m_dirty = true;
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in ThreadDAOImplJDBC.update.");
        } finally {
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    /**
     * This method should be call only when we can make sure that threadID is in database
     */
    public void increaseReplyCount(int threadID)
        throws DatabaseException, ObjectNotFoundException {

        Connection connection = null;
        PreparedStatement statement = null;
        String sql = "UPDATE " + TABLE_NAME + " SET ThreadReplyCount = ThreadReplyCount + 1 WHERE ThreadID = ?";
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql);
            statement.setInt(1, threadID);
            if (statement.executeUpdate() != 1) {
                throw new ObjectNotFoundException("Cannot update the ThreadReplyCount in table Thread. Please contact Web site Administrator.");
            }
            //@todo: coi lai cho nay
            // ATTENTION !!!
            setDirty(true);
        } catch (SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error occured when update Thread: column name = ThreadReplyCount.");
        } finally {
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    /*
     * Included columns: LastPostMemberName
     * Excluded columns: ThreadID, ForumID, MemberName, ThreadTopic, ThreadBody,
     *                   ThreadVoteCount, ThreadVoteTotalStars, ThreadCreationDate, ThreadLastPostDate, ThreadType,
     *                   ThreadOption, ThreadStatus, ThreadHasPoll, ThreadViewCount, ThreadReplyCount,
     *                   ThreadIcon, ThreadDuration
     */
    public void updateLastPostMemberName(int threadID, // primary key
                        String lastPostMemberName)
        throws ObjectNotFoundException, DatabaseException, ForeignKeyNotFoundException {

        //we also allow guests to send posts (if admin allows that)
        if ((lastPostMemberName!=null) && (lastPostMemberName.length()>0)) {
            try {
                // @todo: modify the parameter list as needed
                // If this method does not change the foreign key columns, you can comment this block of code.
                DAOFactory.getMemberDAO().findByAlternateKey_MemberName(lastPostMemberName);
            } catch(ObjectNotFoundException e) {
                throw new ForeignKeyNotFoundException("Foreign key refers to table 'Member' does not exist. Cannot update table 'Forum'.");
            }
        } else lastPostMemberName=""; //so we don't get 'null' in sql query

        Connection connection = null;
        PreparedStatement statement = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("UPDATE " + TABLE_NAME + " SET LastPostMemberName = ?");
        sql.append(" WHERE ThreadID = ?");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());

            // // column(s) to update
            statement.setString(1, lastPostMemberName);

            // primary key column(s)
            statement.setInt(2, threadID);

            if (statement.executeUpdate() != 1) {
                // Some drivers dont update database if it detect old and new data are the same
                // @todo: should check driver, not check database
                // Currently there is only one driver: Caucho MySql driver
                if ( DBUtils.getDatabaseType() != DBUtils.DATABASE_MYSQL ) {
                    throw new ObjectNotFoundException("Cannot update table Thread where primary key = (" + threadID + ").");
                } else {
                    log.warn("WARNING: By pass the check for Caucho MySql driver.");
                }
            }
            setDirty(true);
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in ThreadDAOImplJDBC.update.");
        } finally {
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    /*
     * Included columns: ThreadLastPostDate
     * Excluded columns: ThreadID, ForumID, MemberName, LastPostMemberName, ThreadTopic,
     *                   ThreadBody, ThreadVoteCount, ThreadVoteTotalStars, ThreadCreationDate, ThreadType,
     *                   ThreadOption, ThreadStatus, ThreadHasPoll, ThreadViewCount, ThreadReplyCount,
     *                   ThreadIcon, ThreadDuration
     */
    public void updateLastPostDate(int threadID, // primary key
                        Timestamp threadLastPostDate)
        throws ObjectNotFoundException, DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("UPDATE " + TABLE_NAME + " SET ThreadLastPostDate = ?");
        sql.append(" WHERE ThreadID = ?");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());

            // // column(s) to update
            statement.setTimestamp(1, threadLastPostDate);

            // primary key column(s)
            statement.setInt(2, threadID);

            if (statement.executeUpdate() != 1) {
                throw new ObjectNotFoundException("Cannot update table Thread where primary key = (" + threadID + ").");
            }
            m_dirty = true;
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in ThreadDAOImplJDBC.update.");
        } finally {
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    /*
     * Included columns: ForumID, MemberName, LastPostMemberName, ThreadTopic, ThreadBody,
     *                   ThreadVoteCount, ThreadVoteTotalStars, ThreadCreationDate, ThreadLastPostDate, ThreadType,
     *                   ThreadOption, ThreadStatus, ThreadHasPoll, ThreadViewCount, ThreadReplyCount,
     *                   ThreadIcon, ThreadDuration
     * Excluded columns: ThreadID
     */
    public ThreadBean getBean(int threadID)
        throws ObjectNotFoundException, DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("SELECT ForumID, MemberName, LastPostMemberName, ThreadTopic, ThreadBody, ThreadVoteCount, ThreadVoteTotalStars, ThreadCreationDate, ThreadLastPostDate, ThreadType, ThreadOption, ThreadStatus, ThreadHasPoll, ThreadViewCount, ThreadReplyCount, ThreadIcon, ThreadDuration");
        sql.append(" FROM " + TABLE_NAME);
        sql.append(" WHERE ThreadID = ?");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());
            statement.setInt(1, threadID);
            resultSet = statement.executeQuery();
            if(!resultSet.next()) {
                throw new ObjectNotFoundException("Cannot find the row in table Thread where primary key = (" + threadID + ").");
            }

            ThreadBean bean = new ThreadBean();
            // @todo: uncomment the following line(s) as needed
            bean.setThreadID(threadID);
            bean.setForumID(resultSet.getInt("ForumID"));
            bean.setMemberName(resultSet.getString("MemberName"));
            bean.setLastPostMemberName(resultSet.getString("LastPostMemberName"));
            bean.setThreadTopic(resultSet.getString("ThreadTopic"));
            bean.setThreadBody(resultSet.getString("ThreadBody"));
            bean.setThreadVoteCount(resultSet.getInt("ThreadVoteCount"));
            bean.setThreadVoteTotalStars(resultSet.getInt("ThreadVoteTotalStars"));
            bean.setThreadCreationDate(resultSet.getTimestamp("ThreadCreationDate"));
            bean.setThreadLastPostDate(resultSet.getTimestamp("ThreadLastPostDate"));
            bean.setThreadType(resultSet.getInt("ThreadType"));
            bean.setThreadOption(resultSet.getInt("ThreadOption"));
            bean.setThreadStatus(resultSet.getInt("ThreadStatus"));
            bean.setThreadHasPoll(resultSet.getInt("ThreadHasPoll"));
            bean.setThreadViewCount(resultSet.getInt("ThreadViewCount"));
            bean.setThreadReplyCount(resultSet.getInt("ThreadReplyCount"));
            bean.setThreadIcon(resultSet.getString("ThreadIcon"));
            bean.setThreadDuration(resultSet.getInt("ThreadDuration"));
            return bean;
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in ThreadDAOImplJDBC.getBean(pk).");
        } finally {
            DBUtils.closeResultSet(resultSet);
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    /**
     * Note: this is a customized method
     */
    public int getNumberOfEnableBeans_inForum(int forumID)
        throws AssertionException, DatabaseException {

        return getNumberOfBeans_inForum(forumID, true);
    }

    public int getNumberOfDisableBeans_inForum(int forumID)
        throws AssertionException, DatabaseException {

        return getNumberOfBeans_inForum(forumID, false);
    }

    private int getNumberOfBeans_inForum(int forumID, boolean enable)
        throws AssertionException, DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("SELECT Count(*)");
        sql.append(" FROM " + TABLE_NAME);
        sql.append(" WHERE ForumID = ?");
        if (enable) {
            sql.append(" AND ThreadStatus <> 1 ");
        } else {//disable
            sql.append(" AND ThreadStatus = 1 ");
        }
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());
            statement.setInt(1, forumID);
            resultSet = statement.executeQuery();
            if (!resultSet.next()) {
                throw new AssertionException("Assertion in ThreadDAOImplJDBC.getNumberOfThreads.");
            }