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package org.apache.catalina.valves;
import org.apache.catalina.*;
import org.apache.catalina.session.PersistentManager;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
/**
* Valve that implements the default basic behavior for the
* StandardHost container implementation.
*
* USAGE CONSTRAINT: To work correctly it requires a PersistentManager.
*
* @author Jean-Frederic Clere
* @version $Revision: 1.2 $ $Date: 2005/12/08 01:28:24 $
*/
public class PersistentValve
extends ValveBase {
// ----------------------------------------------------- Instance Variables
/**
* The descriptive information related to this implementation.
*/
private static final String info =
"org.apache.catalina.valves.PersistentValve/1.0";
// ------------------------------------------------------------- Properties
/**
* Return descriptive information about this Valve implementation.
*/
public String getInfo() {
return (info);
}
// --------------------------------------------------------- Public Methods
/**
* Select the appropriate child Context to process this request,
* based on the specified request URI. If no matching Context can
* be found, return an appropriate HTTP error.
*
* @param request Request to be processed
* @param response Response to be produced
*
* @exception IOException if an input/output error occurred
* @exception ServletException if a servlet error occurred
*/
public int invoke(Request request, Response response)
throws IOException, ServletException {
// Select the Context to be used for this Request
Context context = request.getContext();
if (context == null) {
((HttpServletResponse) response.getResponse()).sendError
(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
rb.getString(LogFacade.NO_CONTEXT_CONFIGURED));
return END_PIPELINE;
}
// Bind the context CL to the current thread
Thread.currentThread().setContextClassLoader
(context.getLoader().getClassLoader());
// Update the session last access time for our session (if any)
HttpServletRequest hreq = (HttpServletRequest) request.getRequest();
String sessionId = hreq.getRequestedSessionId();
Manager manager = context.getManager();
if (sessionId != null && manager != null) {
if (manager instanceof PersistentManager) {
Store store = ((PersistentManager) manager).getStore();
if (store != null) {
Session session = null;
try {
session = store.load(sessionId);
} catch (Exception e) {
log("deserializeError");
}
if (session != null) {
if (!session.isValid() ||
isSessionStale(session, System.currentTimeMillis())) {
log("session swapped in is invalid or expired");
session.expire();
store.remove(sessionId);
} else {
session.setManager(manager);
// session.setId(sessionId); Only if new ???
manager.add(session);
// ((StandardSession)session).activate();
session.access();
}
}
}
}
}
log("sessionId: " + sessionId);
// Ask the next valve to process the request.
return INVOKE_NEXT;
}
public void postInvoke(Request request, Response response)
throws IOException, ServletException{
Context context = request.getContext();
if (context == null) {
((HttpServletResponse) response.getResponse()).sendError
(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
rb.getString(LogFacade.NO_CONTEXT_CONFIGURED));
return;
}
// Bind the context CL to the current thread
Thread.currentThread().setContextClassLoader
(context.getLoader().getClassLoader());
// Update the session last access time for our session (if any)
HttpServletRequest hreq = (HttpServletRequest) request.getRequest();
Manager manager = context.getManager();
// Read the sessionid after the response.
// HttpSession hsess = hreq.getSession(false);
String newsessionId = null;
if (request instanceof org.apache.catalina.connector.Request) {
Session sess;
try {
sess = ((org.apache.catalina.connector.Request) request).getSessionInternal();
} catch (Exception ex) {
sess = null;
}
if (sess!=null) {
newsessionId = sess.getIdInternal();
}
} else {
HttpSession hsess;
try {
hsess = hreq.getSession();
} catch (Exception ex) {
hsess = null;
}
if (hsess!=null) {
newsessionId = hsess.getId();
}
}
log("newsessionId: " + newsessionId);
if (newsessionId!=null) {
/* store the session in the store and remove it from the manager */
if (manager instanceof PersistentManager) {
Session session = manager.findSession(newsessionId);
Store store = ((PersistentManager) manager).getStore();
if (store != null && session!=null &&
session.isValid() &&
!isSessionStale(session, System.currentTimeMillis())) {
// ((StandardSession)session).passivate();
store.save(session);
((PersistentManager) manager).removeSuper(session);
session.recycle();
} else if (session!=null) {
log("newsessionId store: " + store + " session: " +
session + " valid: " + session.isValid() +
" Staled: " +
isSessionStale(session, System.currentTimeMillis()));
}
} else {
log("newsessionId Manager: " + manager);
}
}
}
/**
* Log a message on the Logger associated with our Container (if any).
*
* @param message Message to be logged
*/
protected void log(String message) {
Logger logger = container.getLogger();
if (logger != null)
logger.log(this.toString() + ": " + message);
else
System.out.println(this.toString() + ": " + message);
}
/**
* Indicate whether the session has been idle for longer
* than its expiration date as of the supplied time.
*
* FIXME: Probably belongs in the Session class.
*/
protected boolean isSessionStale(Session session, long timeNow) {
int maxInactiveInterval = session.getMaxInactiveInterval();
if (maxInactiveInterval >= 0) {
int timeIdle = // Truncate, do not round up
(int) ((timeNow - session.getLastAccessedTime()) / 1000L);
if (timeIdle >= maxInactiveInterval)
return true;
}
return false;
}
}