/** Get an unused ID string for storing an object in the session */
protected String getNewSessionObjectId() {
HttpSession session = getSession();
synchronized (session) {
Integer id = (Integer) getSession().getAttribute(SESSION_KEY_OBJECT_ID);
if (id == null) {
id = new Integer(1);
}
session.setAttribute(SESSION_KEY_OBJECT_ID, new Integer(id.intValue() + 1));
return id.toString();
}
}
/** Get the ID with which the object is associated with the session, if any */
protected String getSessionObjectId(Object obj) {
HttpSession session = getSession();
BidiMap map;
synchronized (session) {
map = (BidiMap) session.getAttribute(SESSION_KEY_OBJ_MAP);
if (map == null) {
map = new DualHashBidiMap();
session.setAttribute(SESSION_KEY_OBJ_MAP, map);
}
}
synchronized (map) {
String id = (String) map.get(obj);
if (id == null) {
id = getNewSessionObjectId();
map.put(obj, id);
}
return id;
}
}
/** Common request handling. */
public void service(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resetState();
boolean success = false;
HttpSession session = req.getSession(false);
try {
this.req = req;
this.resp = resp;
if (log.isDebug()) {
logParams();
}
resp.setContentType("text/html");
if (!mayPageBeCached()) {
resp.setHeader("pragma", "no-cache");
resp.setHeader("Cache-control", "no-cache");
}
reqURL = new URL(UrlUtil.getRequestURL(req));
clientAddr = getLocalIPAddr();
// check that current user has permission to run this servlet
if (!isServletAllowed(myServletDescr())) {
displayWarningInLieuOfPage("You are not authorized to use " + myServletDescr().heading);
return;
}
// check whether servlet is disabled
String reason = ServletUtil.servletDisabledReason(myServletDescr().getServletName());
if (reason != null) {
displayWarningInLieuOfPage("This function is disabled. " + reason);
return;
}
if (session != null) {
session.setAttribute(SESSION_KEY_RUNNING_SERVLET, getHeading());
String reqHost = req.getRemoteHost();
String forw = req.getHeader(HttpFields.__XForwardedFor);
if (!StringUtil.isNullString(forw)) {
reqHost += " (proxies for " + forw + ")";
}
session.setAttribute(SESSION_KEY_REQUEST_HOST, reqHost);
}
lockssHandleRequest();
success = (errMsg == null);
} catch (ServletException e) {
log.error("Servlet threw", e);
throw e;
} catch (IOException e) {
log.error("Servlet threw", e);
throw e;
} catch (RuntimeException e) {
log.error("Servlet threw", e);
throw e;
} finally {
if (session != null) {
session.setAttribute(SESSION_KEY_RUNNING_SERVLET, null);
session.setAttribute(LockssFormAuthenticator.__J_AUTH_ACTIVITY, TimeBase.nowMs());
}
if ("please".equalsIgnoreCase(req.getHeader("X-Lockss-Result"))) {
log.debug3("X-Lockss-Result: " + (success ? "Ok" : "Fail"));
resp.setHeader("X-Lockss-Result", success ? "Ok" : "Fail");
}
resetMyLocals();
resetLocals();
}
}