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package org.apache.catalina.session;
import org.apache.catalina.Container;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.Loader;
import org.apache.catalina.LogFacade;
import org.apache.catalina.Session;
import org.apache.catalina.util.CustomObjectInputStream;
import java.io.*;
import java.sql.*;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.ResourceBundle;
/**
* Implementation of the Store interface that stores
* serialized session objects in a database. Sessions that are
* saved are still subject to being expired based on inactivity.
*
* @author Bip Thelin
* @version $Revision: 1.4 $, $Date: 2006/11/09 01:12:51 $
*/
public class JDBCStore extends StoreBase {
private static final ResourceBundle rb = LogFacade.getLogger().getResourceBundle();
/**
* The descriptive information about this implementation.
*/
protected static final String info = "JDBCStore/1.0";
/**
* Context name associated with this Store
*/
private String name = null;
/**
* Name to register for this Store, used for logging.
*/
protected static final String storeName = "JDBCStore";
/**
* Name to register for the background thread.
*/
protected String threadName = "JDBCStore";
/**
* Connection string to use when connecting to the DB.
*/
protected String connString = null;
/**
* The database connection.
*/
private Connection conn = null;
/**
* Driver to use.
*/
protected String driverName = null;
// ------------------------------------------------------------- Table & cols
/**
* Table to use.
*/
protected String sessionTable = "tomcat$sessions";
/**
* Column to use for /Engine/Host/Context name
*/
protected String sessionAppCol = "app";
/**
* Id column to use.
*/
protected String sessionIdCol = "id";
/**
* Data column to use.
*/
protected String sessionDataCol = "data";
/**
* Is Valid column to use.
*/
protected String sessionValidCol = "valid";
/**
* Max Inactive column to use.
*/
protected String sessionMaxInactiveCol = "maxinactive";
/**
* Last Accessed column to use.
*/
protected String sessionLastAccessedCol = "lastaccess";
// ------------------------------------------------------------- SQL Variables
/**
* Variable to hold the getSize() prepared statement.
*/
protected PreparedStatement preparedSizeSql = null;
/**
* Variable to hold the keys() prepared statement.
*/
protected PreparedStatement preparedKeysSql = null;
/**
* Variable to hold the save() prepared statement.
*/
protected PreparedStatement preparedSaveSql = null;
/**
* Variable to hold the clear() prepared statement.
*/
protected PreparedStatement preparedClearSql = null;
/**
* Variable to hold the remove() prepared statement.
*/
protected PreparedStatement preparedRemoveSql = null;
/**
* Variable to hold the load() prepared statement.
*/
protected PreparedStatement preparedLoadSql = null;
// ------------------------------------------------------------- Properties
/**
* Return the info for this Store.
*/
public String getInfo() {
return(info);
}
/**
* Return the name for this instance (built from container name)
*/
public String getName() {
if (name == null) {
Container container = manager.getContainer();
String contextName = container.getName();
String hostName = "";
String engineName = "";
if (container.getParent() != null) {
Container host = container.getParent();
hostName = host.getName();
if (host.getParent() != null) {
engineName = host.getParent().getName();
}
}
name = "/" + engineName + "/" + hostName + contextName;
}
return name;
}
/**
* Return the thread name for this Store.
*/
public String getThreadName() {
return(threadName);
}
/**
* Return the name for this Store, used for logging.
*/
public String getStoreName() {
return(storeName);
}
/**
* Set the driver for this Store.
*
* @param driverName The new driver
*/
public void setDriverName(String driverName) {
String oldDriverName = this.driverName;
this.driverName = driverName;
support.firePropertyChange("driverName",
oldDriverName,
this.driverName);
this.driverName = driverName;
}
/**
* Return the driver for this Store.
*/
public String getDriverName() {
return(this.driverName);
}
/**
* Set the Connection URL for this Store.
*
* @param connectionURL The new Connection URL
*/
public void setConnectionURL(String connectionURL) {
String oldConnString = this.connString;
this.connString = connectionURL;
support.firePropertyChange("connString",
oldConnString,
this.connString);
}
/**
* Return the Connection URL for this Store.
*/
public String getConnectionURL() {
return(this.connString);
}
/**
* Set the table for this Store.
*
* @param sessionTable The new table
*/
public void setSessionTable(String sessionTable) {
String oldSessionTable = this.sessionTable;
this.sessionTable = sessionTable;
support.firePropertyChange("sessionTable",
oldSessionTable,
this.sessionTable);
}
/**
* Return the table for this Store.
*/
public String getSessionTable() {
return(this.sessionTable);
}
/**
* Set the App column for the table.
*
* @param sessionAppCol the column name
*/
public void setSessionAppCol(String sessionAppCol) {
String oldSessionAppCol = this.sessionAppCol;
this.sessionAppCol = sessionAppCol;
support.firePropertyChange("sessionAppCol",
oldSessionAppCol,
this.sessionAppCol);
}
/**
* Return the web application name column for the table.
*/
public String getSessionAppCol() {
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 {
String keysSql =
"SELECT " + sessionIdCol + " FROM " + sessionTable +
" WHERE " + sessionAppCol + " = ?";
ResultSet rst = null;
String keys[] = null;
int i;
synchronized(this) {
Connection _conn = getConnection();
if(_conn == null) {
return(new String[0]);
}
try {
if(preparedKeysSql == null) {
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 = tmpkeys.toArray(new String[tmpkeys.size()]);
} catch(SQLException e) {
String msg = MessageFormat.format(rb.getString(LogFacade.SQL_ERROR),
e);
log(msg);
} finally {
try {
if(rst != null) {
rst.close();
}
} catch(SQLException e) {
// Ignore
}
release(_conn);
}
}
return(keys);
}
/**
* Return an integer containing a count of all Sessions
* currently saved in this Store. If there are no Sessions,
* 0 is returned.
*
* @exception IOException if an input/output error occurred
*/
public int getSize() throws IOException {
int size = 0;
String sizeSql =
"SELECT COUNT(" + sessionIdCol + ") FROM " + sessionTable +
" WHERE " + sessionAppCol + " = ?";
ResultSet rst = null;
synchronized(this) {
Connection _conn = getConnection();
if(_conn == null) {
return(size);
}
try {
if(preparedSizeSql == null) {
preparedSizeSql = _conn.prepareStatement(sizeSql);
}
preparedSizeSql.setString(1, getName());
rst = preparedSizeSql.executeQuery();
if (rst.next()) {
size = rst.getInt(1);
}
} catch(SQLException e) {
String msg = MessageFormat.format(rb.getString(LogFacade.SQL_ERROR),
e);
log(msg);
} finally {
try {
if(rst != null)
rst.close();
} catch(SQLException e) {
// Ignore
}
release(_conn);
}
}
return(size);
}
/**
* Load the Session associated with the id id.
* If no such session is found null is returned.
*
* @param id a value of type String
* @return the stored Session
* @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();
String loadSql =
"SELECT " + sessionIdCol + ", " + sessionDataCol + " FROM " +
sessionTable + " WHERE " + sessionIdCol + " = ? AND " +
sessionAppCol + " = ?";
synchronized(this) {
Connection _conn = getConnection();
if(_conn == null) {
return(null);
}
try {
if(preparedLoadSql == null) {
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 (debug > 0) {
String msg = MessageFormat.format(rb.getString(LogFacade.LOADING_SESSION_FROM_DATABASE),
new Object[] {id, sessionTable});
log(msg);
}
_session = StandardSession.deserialize(ois, manager);
_session.setManager(manager);
} else if (debug > 0) {
log(getStoreName()+": No persisted data object found");
}
} catch(SQLException e) {
String msg = MessageFormat.format(rb.getString(LogFacade.SQL_ERROR),
e);
log(msg);
} finally {
try {
if(rst != null) {
rst.close();
}
} catch(SQLException e) {
// Ignore
}
if (ois != null) {
try {
ois.close();
} catch (IOException e) {
// Ignore
}
}
release(_conn);
}
}
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 {
String removeSql =
"DELETE FROM " + sessionTable + " WHERE " + sessionIdCol +
" = ? AND " + sessionAppCol + " = ?";
synchronized(this) {
Connection _conn = getConnection();
if(_conn == null) {
return;
}
try {
if(preparedRemoveSql == null) {
preparedRemoveSql = _conn.prepareStatement(removeSql);
}
preparedRemoveSql.setString(1, id);
preparedRemoveSql.setString(2, getName());
preparedRemoveSql.execute();
} catch(SQLException e) {
String msg = MessageFormat.format(rb.getString(LogFacade.SQL_ERROR),
e);
log(msg);
} finally {
release(_conn);
}
}
if (debug > 0) {
String msg = MessageFormat.format(rb.getString(LogFacade.REMOVING_SESSION_FROM_DATABASE),
new Object[] {id, sessionTable});
log(msg);
}
}
/**
* Remove all of the Sessions in this Store.
*
* @exception IOException if an input/output error occurs
*/
public void clear() throws IOException {
String clearSql =
"DELETE FROM " + sessionTable + " WHERE " + sessionAppCol + " = ?";
synchronized(this) {
Connection _conn = getConnection();
if(_conn == null) {
return;
}
try {
if(preparedClearSql == null) {
preparedClearSql = _conn.prepareStatement(clearSql);
}
preparedClearSql.setString(1, getName());
preparedClearSql.execute();
} catch(SQLException e) {
String msg = MessageFormat.format(rb.getString(LogFacade.SQL_ERROR),
e);
log(msg);
} finally {
release(_conn);
}
}
}
/**
* Save a session to the Store.
*
* @param session the session to be stored
* @exception IOException if an input/output error occurs
*/
public void save(Session session) throws IOException {
String saveSql =
"INSERT INTO " + sessionTable + " (" + sessionIdCol + ", " +
sessionAppCol + ", " +
sessionDataCol + ", " +
sessionValidCol + ", " +
sessionMaxInactiveCol + ", " +
sessionLastAccessedCol + ") VALUES (?, ?, ?, ?, ?, ?)";
ObjectOutputStream oos = null;
ByteArrayOutputStream bos = null;
ByteArrayInputStream bis = null;
InputStream in = null;
synchronized(this) {
Connection _conn = getConnection();
if(_conn == null) {
return;
}
// If sessions already exist in DB, remove and insert again.
// TODO:
// * Check if ID exists in database and if so use UPDATE.
remove(session.getIdInternal());
try {
bos = new ByteArrayOutputStream();
oos = new ObjectOutputStream(new BufferedOutputStream(bos));
oos.writeObject(session);
oos.close();
byte[] obs = bos.toByteArray();
int size = obs.length;
bis = new ByteArrayInputStream(obs, 0, size);
in = new BufferedInputStream(bis, size);
if(preparedSaveSql == null) {
preparedSaveSql = _conn.prepareStatement(saveSql);
}
preparedSaveSql.setString(1, session.getIdInternal());
preparedSaveSql.setString(2, getName());
preparedSaveSql.setBinaryStream(3, in, size);
preparedSaveSql.setString(4, session.isValid()?"1":"0");
preparedSaveSql.setInt(5, session.getMaxInactiveInterval());
preparedSaveSql.setLong(6, session.getLastAccessedTime());
preparedSaveSql.execute();
} catch(SQLException e) {
String msg = MessageFormat.format(rb.getString(LogFacade.SQL_ERROR),
e);
log(msg);
} catch (IOException e) {
// Ignore
} finally {
if (oos != null) {
oos.close();
}
if(bis != null) {
bis.close();
}
if(in != null) {
in.close();
}
release(_conn);
}
}
if (debug > 0) {
String msg = MessageFormat.format(rb.getString(LogFacade.SAVING_SESSION_TO_DATABASE),
new Object[] {session.getIdInternal(), sessionTable});
log(msg);
}
}
// --------------------------------------------------------- Protected Methods
/**
* Check the connection associated with this store, if it's
* null or closed try to reopen it.
* Returns null if the connection could not be established.
*
* @return Connection if the connection succeeded
*/
protected Connection getConnection(){
try {
if(conn == null || conn.isClosed()) {
Class.forName(driverName);
String databaseConnClosedMsg = rb.getString(LogFacade.DATABASE_CONNECTION_CLOSED);
log(databaseConnClosedMsg);
conn = DriverManager.getConnection(connString);
conn.setAutoCommit(true);
if(conn == null || conn.isClosed()) {
String openDatabaseFailedMsg = rb.getString(LogFacade.RE_OPEN_DATABASE_FAILED);
log(openDatabaseFailedMsg);
}
}
} catch (SQLException ex){
String msg = MessageFormat.format(rb.getString(LogFacade.SQL_EXCEPTION),
ex.toString());
log(msg);
} catch (ClassNotFoundException ex) {
String msg = MessageFormat.format(rb.getString(LogFacade.JDBC_DRIVER_CLASS_NOT_FOUND),
ex.toString());
log(msg);
}
return conn;
}
/**
* Release the connection, not needed here since the
* connection is not associated with a connection pool.
*
* @param conn The connection to be released
*/
protected void release(Connection conn) {
// NOOP
}
/**
* Called once when this Store is first started.
*/
public void start() throws LifecycleException {
super.start();
// Open connection to the database
this.conn = getConnection();
}
/**
* Gracefully terminate everything associated with our db.
* Called once when this Store is stoping.
*
*/
public void stop() throws LifecycleException {
super.stop();
// Close and release everything associated with our db.
if(conn != null) {
try {
conn.commit();
} catch (SQLException e) {
// Ignore
}
if( preparedSizeSql != null ) {
try {
preparedSizeSql.close();
} catch (SQLException e) {
// Ignore
}
}
if( preparedKeysSql != null ) {
try {
preparedKeysSql.close();
} catch (SQLException e) {
// Ignore
}
}
if( preparedSaveSql != null ) {
try {
preparedSaveSql.close();
} catch (SQLException e) {
// Ignore
}
}
if( preparedClearSql != null ) {
try {
preparedClearSql.close();
} catch (SQLException e) {
// Ignore
}
}
if( preparedRemoveSql != null ) {
try {
preparedRemoveSql.close();
} catch (SQLException e) {
// Ignore
}
}
if( preparedLoadSql != null ) {
try {
preparedLoadSql.close();
} catch (SQLException e) {
// Ignore
}
}
try {
conn.close();
} catch (SQLException e) {
// Ignore
}
this.preparedSizeSql = null;
this.preparedKeysSql = null;
this.preparedSaveSql = null;
this.preparedClearSql = null;
this.preparedRemoveSql = null;
this.preparedLoadSql = null;
this.conn = null;
}
}
}