>From wicket source code WebRequestCycleProcessor has a lock on session. (Look at the source code below). >From a profiler we can easily observe that %57 of the time is spent on this function especially on lock region. Is there any way to speed it up this source code ?
/** * @see org.apache.wicket.request.IRequestCycleProcessor#resolve(org.apache.wicket.RequestCycle, * org.apache.wicket.request.RequestParameters) */ public IRequestTarget resolve(final RequestCycle requestCycle, final RequestParameters requestParameters) { IRequestCodingStrategy requestCodingStrategy = requestCycle.getProcessor() .getRequestCodingStrategy(); final String path = requestParameters.getPath(); IRequestTarget target = null; // See whether this request points to a bookmarkable page if (requestParameters.getBookmarkablePageClass() != null) { target = resolveBookmarkablePage(requestCycle, requestParameters); } // See whether this request points to a rendered page else if (requestParameters.getComponentPath() != null) { // marks whether or not we will be processing this request boolean processRequest = true; synchronized (requestCycle.getSession()) { // we need to check if this request has been flagged as // process-only-if-path-is-active and if so make sure this // condition is met if (requestParameters.isOnlyProcessIfPathActive()) { // this request has indeed been flagged as // process-only-if-path-is-active Session session = Session.get(); IPageMap pageMap = session.pageMapForName(requestParameters.getPageMapName(), false); if (pageMap == null) { // requested pagemap no longer exists - ignore this // request processRequest = false; } else if (pageMap instanceof AccessStackPageMap) { AccessStackPageMap accessStackPageMap = (AccessStackPageMap)pageMap; if (accessStackPageMap.getAccessStack().size() > 0) { final Access access = (Access)accessStackPageMap.getAccessStack() .peek(); final int pageId = Integer .parseInt(Strings.firstPathComponent(requestParameters .getComponentPath(), Component.PATH_SEPARATOR)); if (pageId != access.getId()) { // the page is no longer the active page // - ignore this request processRequest = false; } else { final int version = requestParameters.getVersionNumber(); if (version != Page.LATEST_VERSION && version != access.getVersion()) { // version is no longer the active version - // ignore this request processRequest = false; } } } } else { // TODO also this should work.. } } } if (processRequest) { try { target = resolveRenderedPage(requestCycle, requestParameters); } catch (IgnoreAjaxRequestException e) { target = EmptyAjaxRequestTarget.getInstance(); } } else { throw new PageExpiredException("Request cannot be processed"); } } // See whether this request points to a shared resource else if (requestParameters.getResourceKey() != null) { target = resolveSharedResource(requestCycle, requestParameters); } // See whether this request points to the home page else if (Strings.isEmpty(path) || ("/".equals(path))) { target = resolveHomePageTarget(requestCycle, requestParameters); } // NOTE we are doing the mount check as the last item, so that it will // only be executed when everything else fails. This enables URLs like // /foo/bar/?wicket:bookmarkablePage=my.Page to be resolved, where // is either a valid mount or a non-valid mount. I (Eelco) am not // absolutely sure this is a great way to go, but it seems to have been // established as the default way of doing things. If we ever want to // tighten the algorithm up, it should be combined by going back to // unmounted paths so that requests with Wicket parameters like // 'bookmarkablePage' are always created and resolved in the same // fashion. There is a test for this in UrlMountingTest. if (target == null) { // still null? check for a mount target = requestCodingStrategy.targetForRequest(requestParameters); if (target == null && requestParameters.getComponentPath() != null) { // If the target is still null and there was a component path // then the Page could not be located in the session throw new PageExpiredException( "Cannot find the rendered page in session [pagemap=" + requestParameters.getPageMapName() + ",componentPath=" + requestParameters.getComponentPath() + ",versionNumber=" + requestParameters.getVersionNumber() + "]"); } } else { // a target was found, but not by looking up a mount. check whether // this is allowed if (Application.get().getSecuritySettings().getEnforceMounts() && requestCodingStrategy.pathForTarget(target) != null) { String msg = "Direct access not allowed for mounted targets"; // the target was mounted, but we got here via another path // : deny the request log.error(msg + " [request=" + requestCycle.getRequest() + ",target=" + target + ",session=" + Session.get() + "]"); throw new AbortWithWebErrorCodeException(HttpServletResponse.SC_FORBIDDEN, msg); } } // (WICKET-1356) in case no target was found, return null here. RequestCycle will deal with it // possible letting wicket filter to pass the request down the filter chain /* if (target == null) { // if we get here, we have no recognized Wicket target, and thus // regard this as a external (non-wicket) resource request on // this server return resolveExternalResource(requestCycle); } */ return target; } -- Pamir Erdem