jdbcstore.java

业界著名的tomcat服务器的最新6.0的源代码。

        return (this.sessionAppCol);
    }

    /**
     * Set the Id column for the table.
     *
     * @param sessionIdCol the column name
     */
    public void setSessionIdCol(String sessionIdCol) {
        String oldSessionIdCol = this.sessionIdCol;
        this.sessionIdCol = sessionIdCol;
        support.firePropertyChange("sessionIdCol",
                oldSessionIdCol,
                this.sessionIdCol);
    }

    /**
     * Return the Id column for the table.
     */
    public String getSessionIdCol() {
        return (this.sessionIdCol);
    }

    /**
     * Set the Data column for the table
     *
     * @param sessionDataCol the column name
     */
    public void setSessionDataCol(String sessionDataCol) {
        String oldSessionDataCol = this.sessionDataCol;
        this.sessionDataCol = sessionDataCol;
        support.firePropertyChange("sessionDataCol",
                oldSessionDataCol,
                this.sessionDataCol);
    }

    /**
     * Return the data column for the table
     */
    public String getSessionDataCol() {
        return (this.sessionDataCol);
    }

    /**
     * Set the Is Valid column for the table
     *
     * @param sessionValidCol The column name
     */
    public void setSessionValidCol(String sessionValidCol) {
        String oldSessionValidCol = this.sessionValidCol;
        this.sessionValidCol = sessionValidCol;
        support.firePropertyChange("sessionValidCol",
                oldSessionValidCol,
                this.sessionValidCol);
    }

    /**
     * Return the Is Valid column
     */
    public String getSessionValidCol() {
        return (this.sessionValidCol);
    }

    /**
     * Set the Max Inactive column for the table
     *
     * @param sessionMaxInactiveCol The column name
     */
    public void setSessionMaxInactiveCol(String sessionMaxInactiveCol) {
        String oldSessionMaxInactiveCol = this.sessionMaxInactiveCol;
        this.sessionMaxInactiveCol = sessionMaxInactiveCol;
        support.firePropertyChange("sessionMaxInactiveCol",
                oldSessionMaxInactiveCol,
                this.sessionMaxInactiveCol);
    }

    /**
     * Return the Max Inactive column
     */
    public String getSessionMaxInactiveCol() {
        return (this.sessionMaxInactiveCol);
    }

    /**
     * Set the Last Accessed column for the table
     *
     * @param sessionLastAccessedCol The column name
     */
    public void setSessionLastAccessedCol(String sessionLastAccessedCol) {
        String oldSessionLastAccessedCol = this.sessionLastAccessedCol;
        this.sessionLastAccessedCol = sessionLastAccessedCol;
        support.firePropertyChange("sessionLastAccessedCol",
                oldSessionLastAccessedCol,
                this.sessionLastAccessedCol);
    }

    /**
     * Return the Last Accessed column
     */
    public String getSessionLastAccessedCol() {
        return (this.sessionLastAccessedCol);
    }

    // --------------------------------------------------------- Public Methods

    /**
     * Return an array containing the session identifiers of all Sessions
     * currently saved in this Store.  If there are no such Sessions, a
     * zero-length array is returned.
     *
     * @exception IOException if an input/output error occurred
     */
    public String[] keys() throws IOException {
        ResultSet rst = null;
        String keys[] = null;
        synchronized (this) {
            int numberOfTries = 2;
            while (numberOfTries > 0) {

                Connection _conn = getConnection();
                if (_conn == null) {
                    return (new String[0]);
                }
                try {
                    if (preparedKeysSql == null) {
                        String keysSql = "SELECT " + sessionIdCol + " FROM "
                                + sessionTable + " WHERE " + sessionAppCol
                                + " = ?";
                        preparedKeysSql = _conn.prepareStatement(keysSql);
					}

                    preparedKeysSql.setString(1, getName());
                    rst = preparedKeysSql.executeQuery();
                    ArrayList tmpkeys = new ArrayList();
                    if (rst != null) {
                        while (rst.next()) {
                            tmpkeys.add(rst.getString(1));
                        }
                    }
                    keys = (String[]) tmpkeys.toArray(new String[tmpkeys.size()]);
                    // Break out after the finally block
                    numberOfTries = 0;
                } catch (SQLException e) {
                    manager.getContainer().getLogger().error(sm.getString(getStoreName() + ".SQLException", e));
                    keys = new String[0];
                    // Close the connection so that it gets reopened next time
                    if (dbConnection != null)
                        close(dbConnection);
                } finally {
                    try {
                        if (rst != null) {
                            rst.close();
                        }
                    } catch (SQLException e) {
                        ;
                    }

                    release(_conn);
                }
                numberOfTries--;
            }
        }

        return (keys);
    }

    /**
     * Return an integer containing a count of all Sessions
     * currently saved in this Store.  If there are no Sessions,
     * <code>0</code> is returned.
     *
     * @exception IOException if an input/output error occurred
     */
    public int getSize() throws IOException {
        int size = 0;
        ResultSet rst = null;

        synchronized (this) {
            int numberOfTries = 2;
            while (numberOfTries > 0) {
                Connection _conn = getConnection();

                if (_conn == null) {
                    return (size);
                }

                try {
                    if (preparedSizeSql == null) {
                        String sizeSql = "SELECT COUNT(" + sessionIdCol
                                + ") FROM " + sessionTable + " WHERE "
                                + sessionAppCol + " = ?";
                        preparedSizeSql = _conn.prepareStatement(sizeSql);
					}

                    preparedSizeSql.setString(1, getName());
                    rst = preparedSizeSql.executeQuery();
                    if (rst.next()) {
                        size = rst.getInt(1);
                    }
                    // Break out after the finally block
                    numberOfTries = 0;
                } catch (SQLException e) {
                    manager.getContainer().getLogger().error(sm.getString(getStoreName() + ".SQLException", e));
                    if (dbConnection != null)
                        close(dbConnection);
                } finally {
                    try {
                        if (rst != null)
                            rst.close();
                    } catch (SQLException e) {
                        ;
                    }

                    release(_conn);
                }
                numberOfTries--;
            }
        }
        return (size);
    }

    /**
     * Load the Session associated with the id <code>id</code>.
     * If no such session is found <code>null</code> is returned.
     *
     * @param id a value of type <code>String</code>
     * @return the stored <code>Session</code>
     * @exception ClassNotFoundException if an error occurs
     * @exception IOException if an input/output error occurred
     */
    public Session load(String id)
            throws ClassNotFoundException, IOException {
        ResultSet rst = null;
        StandardSession _session = null;
        Loader loader = null;
        ClassLoader classLoader = null;
        ObjectInputStream ois = null;
        BufferedInputStream bis = null;
        Container container = manager.getContainer();
 
        synchronized (this) {
            int numberOfTries = 2;
            while (numberOfTries > 0) {
                Connection _conn = getConnection();
                if (_conn == null) {
                    return (null);
                }

                try {
                    if (preparedLoadSql == null) {
                        String loadSql = "SELECT " + sessionIdCol + ", "
                                + sessionDataCol + " FROM " + sessionTable
                                + " WHERE " + sessionIdCol + " = ? AND "
                                + sessionAppCol + " = ?";
                        preparedLoadSql = _conn.prepareStatement(loadSql);
                    }

                    preparedLoadSql.setString(1, id);
                    preparedLoadSql.setString(2, getName());
                    rst = preparedLoadSql.executeQuery();
                    if (rst.next()) {
                        bis = new BufferedInputStream(rst.getBinaryStream(2));

                        if (container != null) {
                            loader = container.getLoader();
                        }
                        if (loader != null) {
                            classLoader = loader.getClassLoader();
                        }
                        if (classLoader != null) {
                            ois = new CustomObjectInputStream(bis,
                                    classLoader);
                        } else {
                            ois = new ObjectInputStream(bis);
                        }

                        if (manager.getContainer().getLogger().isDebugEnabled()) {
                            manager.getContainer().getLogger().debug(sm.getString(getStoreName() + ".loading",
                                    id, sessionTable));
                        }

                        _session = (StandardSession) manager.createEmptySession();
                        _session.readObjectData(ois);
                        _session.setManager(manager);
                      } else if (manager.getContainer().getLogger().isDebugEnabled()) {
                        manager.getContainer().getLogger().debug(getStoreName() + ": No persisted data object found");
                    }
                    // Break out after the finally block
                    numberOfTries = 0;
                } catch (SQLException e) {
                    manager.getContainer().getLogger().error(sm.getString(getStoreName() + ".SQLException", e));
                    if (dbConnection != null)
                        close(dbConnection);
                } finally {
                    try {
                        if (rst != null) {
                            rst.close();
                        }
                    } catch (SQLException e) {
                        ;
                    }
                    if (ois != null) {
                        try {
                            ois.close();
                        } catch (IOException e) {
                            ;
                        }
                    }
                    release(_conn);
                }
                numberOfTries--;
            }
        }

        return (_session);
    }

    /**
     * Remove the Session with the specified session identifier from
     * this Store, if present.  If no such Session is present, this method
     * takes no action.
     *
     * @param id Session identifier of the Session to be removed
     *
     * @exception IOException if an input/output error occurs
     */
    public void remove(String id) throws IOException {

        synchronized (this) {
            int numberOfTries = 2;