/**
* Process the event. Note: it doesn't invoke EventThreadInit and EventThreadCleanup.
*
* <p>This method is to implement {@link org.zkoss.zk.ui.sys.EventProcessingThread}. See also
* {@link org.zkoss.zk.ui.util.Configuration#isEventThreadEnabled}.
*/
public void process() throws Exception {
final ExecutionMonitor execmon = _desktop.getWebApp().getConfiguration().getExecutionMonitor();
// Bug 1506712: event listeners might be zscript, so we have to
// keep built-in variables as long as possible
final Scope scope = Scopes.beforeInterpret(_comp);
// we have to push since process0 might invoke methods from zscript class
try {
Scopes.setImplicit("event", _event);
_event = ((DesktopCtrl) _desktop).beforeProcessEvent(_event);
if (_event != null) {
if (execmon != null) execmon.eventStart(_event);
Scopes.setImplicit("event", _event); // _event might change
((ComponentCtrl) _comp).service(_event, scope);
((DesktopCtrl) _desktop).afterProcessEvent(_event);
}
} finally {
final Execution exec = _desktop.getExecution();
if (exec != null) // just in case
((ExecutionCtrl) exec).setExecutionInfo(null);
if (execmon != null && _event != null) execmon.eventComplete(_event);
Scopes.afterInterpret();
}
}
/**
* Setup this processor before processing the event by calling {@link #process}.
*
* <p>Note: it doesn't invoke {@link ExecutionCtrl#onActivate}
*/
public void setup() {
SessionsCtrl.setCurrent(_desktop.getSession());
final Execution exec = _desktop.getExecution();
ExecutionsCtrl.setCurrent(exec);
((ExecutionCtrl) exec).setCurrentPage(getPage());
}
/**
* Process asynchronous update requests from the client.
*
* @since 3.0.0
*/
protected void process(Session sess, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
final String errClient = request.getHeader("ZK-Error-Report");
if (errClient != null)
if (log.debugable())
log.debug("Error found at client: " + errClient + "\n" + Servlets.getDetail(request));
// parse desktop ID
final WebApp wapp = sess.getWebApp();
final WebAppCtrl wappc = (WebAppCtrl) wapp;
final AuDecoder audec = getAuDecoder(wapp);
final String dtid = audec.getDesktopId(request);
if (dtid == null) {
// Bug 1929139: incomplete request (IE only)
if (log.debugable()) {
final String msg = "Incomplete request\n" + Servlets.getDetail(request);
log.debug(msg);
}
response.sendError(467, "Incomplete request");
return;
}
Desktop desktop = getDesktop(sess, dtid);
if (desktop == null) {
final String cmdId = audec.getFirstCommand(request);
if (!"rmDesktop".equals(cmdId))
desktop = recoverDesktop(sess, request, response, wappc, dtid);
if (desktop == null) {
response.setIntHeader("ZK-Error", response.SC_GONE); // denote timeout
sessionTimeout(request, response, wapp, dtid);
return;
}
}
WebManager.setDesktop(request, desktop);
// reason: a new page might be created (such as include)
final String sid = request.getHeader("ZK-SID");
if (sid != null) // Some client might not have ZK-SID
response.setHeader("ZK-SID", sid);
// parse commands
final Configuration config = wapp.getConfiguration();
final List aureqs;
boolean keepAlive = false;
try {
final boolean timerKeepAlive = config.isTimerKeepAlive();
aureqs = audec.decode(request, desktop);
for (Iterator it = aureqs.iterator(); it.hasNext(); ) {
final String cmdId = ((AuRequest) it.next()).getCommand();
keepAlive = !(!timerKeepAlive && Events.ON_TIMER.equals(cmdId)) && !"dummy".equals(cmdId);
// dummy is used for PollingServerPush for piggyback
if (keepAlive) break; // done
}
} catch (Throwable ex) {
log.warningBriefly(ex);
responseError(request, response, Exceptions.getMessage(ex));
return;
}
if (aureqs.isEmpty()) {
final String errmsg = "Illegal request: cmd required";
log.debug(errmsg);
responseError(request, response, errmsg);
return;
}
((SessionCtrl) sess).notifyClientRequest(keepAlive);
// if (log.debugable()) log.debug("AU request: "+aureqs);
final DesktopCtrl desktopCtrl = (DesktopCtrl) desktop;
final Execution exec = new ExecutionImpl(getServletContext(), request, response, desktop, null);
if (sid != null) ((ExecutionCtrl) exec).setRequestId(sid);
final AuWriter out = AuWriters.newInstance();
out.setCompress(_compress);
out.open(
request,
response,
desktop.getDevice().isSupported(Device.RESEND)
? getProcessTimeout(config.getResendDelay())
: 0);
// Note: getResendDelay() might return nonpositive
try {
wappc.getUiEngine().execUpdate(exec, aureqs, out);
} catch (RequestOutOfSequenceException ex) {
log.warning(ex.getMessage());
response.setHeader("ZK-SID", sid);
response.setIntHeader("ZK-Error", AuResponse.SC_OUT_OF_SEQUENCE);
}
out.close(request, response);
}