/**
* Writes the given value only if it is serializable. If not, null is written.
*
* @since 5.0.7
*/
public static void smartWrite(ObjectOutputStream s, Object val) throws IOException {
final boolean bser =
val instanceof java.io.Serializable || val instanceof java.io.Externalizable;
s.writeObject(bser ? val : null);
if (!bser && val != null && logio.debugable())
logio.debug("Skip not-serializable object: " + val);
}
/** Returns the static method defined in an element, or null if failed. */
/*package*/ static MethodInfo getMethodInfo(Element el) {
final String clsnm = IDOMs.getRequiredAttributeValue(el, "class");
final String sig = IDOMs.getRequiredAttributeValue(el, "signature");
final Class cls;
try {
cls = Classes.forNameByThread(clsnm);
} catch (ClassNotFoundException ex) {
log.error("Class not found: " + clsnm + ", " + el.getLocator());
return null; // to report as many errors as possible
}
try {
final Method mtd = Classes.getMethodBySignature(cls, sig, null);
if ((mtd.getModifiers() & Modifier.STATIC) == 0) {
log.error("Not a static method: " + mtd);
return null;
}
final Object[] args = new Object[mtd.getParameterTypes().length];
for (int j = 0; j < args.length; ++j) args[j] = el.getAttributeValue("arg" + j);
return new MethodInfo(mtd, args);
} catch (ClassNotFoundException ex) {
log.realCauseBriefly(
"Unable to load class when resolving " + sig + " " + el.getLocator(), ex);
} catch (NoSuchMethodException ex) {
log.error("Method not found in " + clsnm + ": " + sig + " " + el.getLocator());
}
return null;
}
/**
* rollback the current session.
*
* @param exec the exection to clean up.
* @param ex the StaleObjectStateException being thrown (and not handled) during the execution
*/
private void rollback(Execution exec, Throwable ex) {
try {
if (HibernateUtil.currentSession().getTransaction().isActive()) {
log.debug("Trying to rollback database transaction after exception:" + ex);
HibernateUtil.currentSession().getTransaction().rollback();
}
} catch (Throwable rbEx) {
log.error("Could not rollback transaction after exception! Original Exception:\n" + ex, rbEx);
}
}
public void addRequests(Collection requests) {
for (Iterator it = requests.iterator(); it.hasNext(); ) {
final AuRequest request = (AuRequest) it.next();
try {
request.activate();
if (!isObsolete(request)) addRequest(request);
} catch (ComponentNotFoundException ex) { // ignore it
// ignore it since a long request might remove a timer
// while clients already queues onTimer generated by the timer
if (log.debugable()) log.debug("Ignore request: " + ex.getMessage());
}
}
}
protected void importMergedRegions(Sheet poiSheet, SSheet sheet) {
// merged cells
// reference RangeImpl.getMergeAreas()
int nMerged = poiSheet.getNumMergedRegions();
final SheetImpl sheetImpl = (SheetImpl) sheet;
for (int i = nMerged - 1; i >= 0; --i) {
final CellRangeAddress mergedRegion = poiSheet.getMergedRegion(i);
// ZSS-1114: any new merged region that overlapped with previous merged region is thrown away
final CellRegion r =
new CellRegion(
mergedRegion.getFirstRow(),
mergedRegion.getFirstColumn(),
mergedRegion.getLastRow(),
mergedRegion.getLastColumn());
final CellRegion overlapped = sheetImpl.checkMergedRegion(r);
if (overlapped != null) {
_logger.warning(
"Drop the region "
+ r
+ " which is overlapped with existing merged area "
+ overlapped
+ ".");
continue;
}
sheetImpl.addDirectlyMergedRegion(r);
}
}
/** @param wapp the Web application (or null if not available yet) */
private void sessionTimeout(
HttpServletRequest request, HttpServletResponse response, WebApp wapp, String dtid)
throws ServletException, IOException {
final String sid = request.getHeader("ZK-SID");
if (sid != null) response.setHeader("ZK-SID", sid);
final AuWriter out = AuWriters.newInstance().open(request, response, 0);
if (!getAuDecoder(wapp).isIgnorable(request, wapp)) {
final String deviceType = getDeviceType(request);
URIInfo ui =
wapp != null ? (URIInfo) wapp.getConfiguration().getTimeoutURI(deviceType) : null;
String uri = ui != null ? ui.uri : null;
out.write(new AuConfirmClose(null)); // Bug: B50-3147382
final AuResponse resp;
if (uri != null) {
if (uri.length() != 0) uri = Encodes.encodeURL(getServletContext(), request, response, uri);
resp = new AuSendRedirect(uri, null);
} else {
String msg = wapp.getConfiguration().getTimeoutMessage(deviceType);
if (msg != null && msg.startsWith("label:")) {
final String key;
msg = Labels.getLabel(key = msg.substring(6), new Object[] {dtid});
if (msg == null) log.warning("Label not found, " + key);
}
if (msg == null) msg = Messages.get(MZk.UPDATE_OBSOLETE_PAGE, dtid);
resp = new AuObsolete(dtid, msg);
}
out.write(resp);
}
out.close(request, response);
}
/**
* Recovers the desktop if possible. It is called if {@link #getDesktop} returns null.
*
* <p>The default implementation will look for any failover manager ({@link FailoverManager}) is
* registered, and forward the invocation to it if found.
*
* @return the recovered desktop, or null if failed to recover
* @since 5.0.3
*/
protected Desktop recoverDesktop(
Session sess,
HttpServletRequest request,
HttpServletResponse response,
WebAppCtrl wappc,
String dtid) {
final FailoverManager failover = wappc.getFailoverManager();
if (failover != null) {
Desktop desktop = null;
final ServletContext ctx = getServletContext();
try {
if (failover.isRecoverable(sess, dtid)) {
desktop = WebManager.getWebManager(ctx).getDesktop(sess, request, response, null, true);
if (desktop == null) // forward or redirect
throw new IllegalStateException("sendRediect or forward not allowed in recovering");
wappc
.getUiEngine()
.execRecover(new ExecutionImpl(ctx, request, response, desktop, null), failover);
return desktop; // success
}
} catch (Throwable ex) {
log.error("Unable to recover " + dtid, ex);
if (desktop != null) ((DesktopCtrl) desktop).recoverDidFail(ex);
}
}
return null;
}
private static final boolean load(String flnm) {
final InputStream strm = ContentTypes.class.getResourceAsStream(flnm);
if (strm == null) return false;
BufferedReader in = null;
// NOTE: we cannot use Properties.load because there might be replicated
// mapping (e.g., jpg=images/jpg, jpg=images/jpeg)
try {
in = new BufferedReader(new InputStreamReader(strm));
String line;
while ((line = in.readLine()) != null) {
final int j = line.indexOf('=');
if (j < 0) {
final int k = Strings.skipWhitespaces(line, 0);
if (k < line.length() && line.charAt(k) != '#')
log.warning("Ignored error; illgal format: " + line);
continue;
}
final String format = line.substring(0, j).trim();
final String ctype = line.substring(j + 1).trim();
if (format.length() == 0 || ctype.length() == 0) {
log.warning("Ignored error; illgal format: " + line);
continue;
}
_fmt2ct.put(format, ctype);
_ct2fmt.put(ctype, format);
}
} catch (IOException ex) {
log.warning("Ingored error: Unable to read " + flnm, ex);
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
}
}
try {
strm.close();
} catch (Throwable ex) {
}
}
return true;
}
/** Writes only serializable elements of the specified collection. */
public static <T> void smartWrite(ObjectOutputStream s, Collection<T> col) throws IOException {
if (col != null) {
final boolean debug = logio.debugable();
for (T val : col) {
if ((val instanceof Serializable) || (val instanceof Externalizable)) {
try {
s.writeObject(val);
} catch (java.io.NotSerializableException ex) {
logio.error("Unable to serialize item: " + val);
throw ex;
}
} else if (val != null && debug) {
logio.debug("Skip not-serializable item: " + val);
}
}
}
s.writeObject(null);
}
private void register0(Object locator) {
if (locator == null) throw new NullPointerException("locator");
synchronized (_locators) {
if (!_locators.add(locator))
log.warning("Replace the old one, because it is replicated: " + locator);
}
reset(); // Labels might be loaded before, so...
}
private void reportError(String message, Employee employee) {
StringBuilder sb =
new StringBuilder(message)
.append(Messages.getString("EmployeeController.5"))
.append(employee);
final String error = sb.toString();
UiUtils.showMessage(error);
log.error(error);
}
public void destroy() {
for (Iterator it = _aues.values().iterator(); it.hasNext(); ) {
final AuExtension aue = (AuExtension) it.next();
try {
aue.destroy();
} catch (Throwable ex) {
log.warningBriefly("Unable to stop " + aue, ex);
}
}
}
/**
* Writes only serializable elements of the specified array.
*
* <p>To read back, use {@link #smartRead(ObjectInputStream, Collection)}.
*
* @since 3.0.0
*/
public static <T> void smartWrite(ObjectOutputStream s, T[] ary) throws IOException {
if (ary != null) {
final boolean debug = logio.debugable();
for (int j = 0; j < ary.length; ++j) {
final T val = ary[j];
if ((val instanceof Serializable) || (val instanceof Externalizable)) {
try {
s.writeObject(val);
} catch (java.io.NotSerializableException ex) {
logio.error("Unable to serialize item: " + val);
throw ex;
}
} else if (val != null && debug) {
logio.debug("Skip not-serializable item: " + val);
}
}
}
s.writeObject(null);
}
private static String getDeviceType(HttpServletRequest request) {
final String agt = request.getHeader("user-agent");
if (agt != null && agt.length() > 0) {
try {
return Devices.getDeviceByClient(agt).getType();
} catch (Throwable ex) {
log.warning("Unknown device for " + agt);
}
}
return "ajax";
}
@Override
public void run() {
while (!_exit) {
try {
nextIteration();
} catch (Exception ex) {
_log.error(ex);
exit();
}
}
}
/**
* Utilities to clean up resources when the application is stopping. Currenly, when a ZK application
* is stopping, ZK will invoke {@link #cleanup}. Thus you can register an implementation of {@link
* Cleanup} to release the resources.
*
* <p>Notice that this utility is introduced mainly to resolve the memory lead issue if an
* application is hot re-deployed. A typical example is to stop any pooled threads.
*
* <h3>How to use:</h3>
*
* <p>First, register the cleanup with {@link #add}.
*
* <p>Second, invoke {@link #cleanup} when necessary, such as when the application is stopping.
*
* @author tomyeh
* @since 3.6.5
*/
public class Cleanups {
private static final Log log = Log.lookup(Cleanups.class);
private static final List _cleanups = new LinkedList();
/**
* Registers a cleanup.
*
* @return true if it is added successfully, or false if the cleanup has been regsitered before.
*/
public static boolean add(Cleanup cleanup) {
if (cleanup == null) throw new IllegalArgumentException();
synchronized (_cleanups) {
if (_cleanups.contains(cleanup)) return false;
return _cleanups.add(cleanup);
}
}
/**
* Un-registers a cleanup.
*
* @return true if it is removed successfully, or false if not registered before.
*/
public static boolean remove(Cleanup cleanup) {
synchronized (_cleanups) {
return _cleanups.remove(cleanup);
}
}
/** Invokes all cleanups registered with {@link #add}. */
public static void cleanup() {
final List cleanups;
synchronized (_cleanups) {
cleanups = new ArrayList(_cleanups);
}
for (Iterator it = cleanups.iterator(); it.hasNext(); ) {
final Cleanup cleanup = (Cleanup) it.next();
try {
cleanup.cleanup();
} catch (Throwable ex) {
log.error("Failed to invoke " + cleanup);
}
}
}
/**
* The interface to implement for each cleanup. It is used with {@link Cleanups#add}.
*
* @since 3.6.5
*/
public static interface Cleanup {
/** Cleanups the thread local variables. */
public void cleanup();
}
}
private static final String getNotFound(int code, Locale locale) {
if (code == NULL_CODE) return ""; // special code
try {
log.error(
"Message code not found: "
+ Integer.toHexString(code)
+ " not in "
+ locale
+ ":"
+ Aide.getBundleInfo(code));
final String hexcode = Integer.toHexString(code);
final String s = getFromBundle(MCommon.MESSAGE_CODE_NOT_FOUND, locale);
return s != null
? MessageFormats.format(s, new Object[] {hexcode}, locale)
: "Unknown message code: " + hexcode;
} catch (Exception ex) {
log.realCauseBriefly(ex);
return "Unknown message code: " + Integer.toHexString(code);
}
}
/**
* Clones the specified object. Use clone() if Cloeable. Otherwise, try to serialize/deserialize
* it by use of MarshalledObject.
*
* <p>If o is null, null is returned.
*
* @exception SystemException if failed to clone
*/
public static final Object clone(Object o) {
if (o == null) return o;
try {
final Class<?> kls = o.getClass();
if (kls.isArray()) return ArraysX.clone(o);
if (o instanceof Cloneable) {
try {
return kls.getMethod("clone").invoke(o);
} catch (NoSuchMethodException ex) {
if (log.debugable()) log.debug("No clone() for " + kls);
}
}
// :TODO: MarshalledObject is said with very bad performance, change it
// if exists other good deep clone method.
return new MarshalledObject<Object>(o).get();
} catch (Exception ex) {
throw SystemException.Aide.wrap(ex);
}
}
/**
* Writes only serializable entries of the specified map. Non-serializable attributes are ignored.
*/
public static <K, V> void smartWrite(ObjectOutputStream s, Map<K, V> map) throws IOException {
if (map != null) {
final boolean debug = logio.debugable();
for (Map.Entry<K, V> me : map.entrySet()) {
final K nm = me.getKey();
final V val = me.getValue();
if (((nm instanceof Serializable) || (nm instanceof Externalizable))
&& (val == null || (val instanceof Serializable) || (val instanceof Externalizable))) {
try {
s.writeObject(nm);
s.writeObject(val);
} catch (java.io.NotSerializableException ex) {
logio.error("Unable to serialize entry: " + nm + '=' + val);
throw ex;
}
} else if (nm != null && debug) {
logio.debug("Skip not-serializable entry: " + nm + '=' + val);
}
}
}
s.writeObject(null); // denote end-of-map
}
private void handleFailedModal(int oldmode, boolean oldvisi) {
try {
if (Executions.getCurrent().getAttribute("javax.servlet.error.exception") != null) {
// handle it specially if it is used for dispalying err
setMode(HIGHLIGHTED);
} else {
setMode(oldmode); // restore
setVisible(oldvisi);
}
} catch (Throwable ex) {
log.realCauseBriefly("Causing another error", ex);
}
}
public void call(Object base, Method method) {
Class<?>[] paramTypes = method.getParameterTypes();
java.lang.annotation.Annotation[][] parmAnnos = method.getParameterAnnotations();
Object[] params = new Object[paramTypes.length];
try {
for (int i = 0; i < paramTypes.length; i++) {
params[i] = resolveParameter(parmAnnos[i], paramTypes[i]);
}
method.invoke(base, params);
} catch (InvocationTargetException invokEx) {
// Ian YT Tsai (2012.06.20), while InvocationTargetException,
// using original exception is much meaningful.
Throwable c = invokEx.getCause();
if (c == null) c = invokEx;
_log.error(c);
throw UiException.Aide.wrap(c);
} catch (Exception e) {
_log.error(e);
throw UiException.Aide.wrap(e);
}
}
/** Invokes all cleanups registered with {@link #add}. */
public static void cleanup() {
final List cleanups;
synchronized (_cleanups) {
cleanups = new ArrayList(_cleanups);
}
for (Iterator it = cleanups.iterator(); it.hasNext(); ) {
final Cleanup cleanup = (Cleanup) it.next();
try {
cleanup.cleanup();
} catch (Throwable ex) {
log.error("Failed to invoke " + cleanup);
}
}
}
/**
* Eliminates single and double quotations to avoid JavaScript injection. It eliminates all
* quotations. In other words, the specified string shall NOT contain any quotations.
*
* <p>It is used to avoid JavaScript injection. For exmple, in DSP or JSP pages, the following
* codes is better to escape with this method. <code><input value="${c:eatQuot(param.some)}"/>
* </code>
*
* @since 3.5.2
*/
public static String eatQuot(String s) {
final int len = s != null ? s.length() : 0;
StringBuffer sb = null;
for (int j = 0; j < len; ++j) {
final char cc = s.charAt(j);
if (cc == '\'' || cc == '"') {
if (sb == null) {
log.warning("JavaScript Injection? Unexpected string detected: " + s);
sb = new StringBuffer(len);
if (j > 0) sb.append(s.substring(0, j));
}
} else if (sb != null) sb.append(cc);
}
return sb != null ? sb.toString() : s;
}
/** Invokes a static method. */
/*package*/ String invoke(MethodInfo mi) {
final Provider provider = getProvider();
final Class[] argTypes = mi.method.getParameterTypes();
final Object[] args = mi.arguments;
if (provider != null)
for (int j = 0; j < args.length; ++j)
if (ServletRequest.class.isAssignableFrom(argTypes[j])) args[j] = provider.request;
else if (ServletResponse.class.isAssignableFrom(argTypes[j])) args[j] = provider.response;
else if (ServletContext.class.isAssignableFrom(argTypes[j])) args[j] = getServletContext();
try {
Object o = mi.method.invoke(null, args);
return o instanceof String ? (String) o : "";
} catch (Throwable ex) { // log and eat ex
log.error("Unable to invoke " + mi.method, ex);
return "";
}
}
private static Extension getExtension() {
if (_ext == null) {
synchronized (BindUiLifeCycle.class) {
if (_ext == null) {
String clsnm = Library.getProperty("org.zkoss.bind.tracker.impl.extension");
if (clsnm != null) {
try {
_ext = (Extension) Classes.newInstanceByThread(clsnm);
} catch (Throwable ex) {
log.realCauseBriefly("Unable to instantiate " + clsnm, ex);
}
}
if (_ext == null) _ext = new DefaultExtension();
}
}
}
return _ext;
}
// called by Provider
InputStream getResourceAsStream(HttpServletRequest request, String path, boolean locate)
throws IOException, ServletException {
if (locate)
path = Servlets.locate(_webctx.getServletContext(), request, path, _webctx.getLocator());
if (_cache.getCheckPeriod() >= 0) {
// Due to Web server might cache the result, we use URL if possible
try {
URL url = _webctx.getResource(path);
if (url != null) return url.openStream();
} catch (Throwable ex) {
log.warningBriefly("Unable to read from URL: " + path, ex);
}
}
// Note: _webctx will handle the renaming for debugJS (.src.js)
return _webctx.getResourceAsStream(path);
}
/**
* Adds an AU extension and associates it with the specified prefix.
*
* <p>If there was an AU extension associated with the same name, the the old AU extension will be
* replaced.
*
* <p>If you want to add an Au extension, even before DHtmlUpdateServlet is started, use {@link
* #addAuExtension(WebApp, String, AuExtension)} instead.
*
* @param prefix the prefix. It must start with "/", but it cannot be "/" nor "/web" (which are
* reserved).
* @param extension the AU extension (never null).
* @return the previous AU extension associated with the specified prefix, or null if the prefix
* was not associated before.
* @see #addAuExtension(WebApp,String,AuExtension)
* @since 5.0.0
*/
public AuExtension addAuExtension(String prefix, AuExtension extension) throws ServletException {
checkAuExtension(prefix, extension);
if (_aues.get(prefix) == extension) // speed up to avoid sync
return extension; // nothing changed
extension.init(this);
// To avoid using sync in doGet(), we make a copy here
final AuExtension old;
synchronized (this) {
final Map ps = new HashMap(_aues);
old = (AuExtension) ps.put(prefix, extension);
_aues = ps;
}
if (old != null)
try {
old.destroy();
} catch (Throwable ex) {
log.warningBriefly("Unable to stop " + old, ex);
}
return old;
}
/**
* Gets a message based on the specified code. If not found, returns an error message to denote
* it.
*
* <p>If fmtArgs is not null, {@link org.zkoss.text.MessageFormats#format} is called to format the
* message. However, unlike MessageFormat's default behavior, all null objects are treated as an
* empty string rather than "null".
*
* <p>It also recognizes {@link org.zkoss.lang.Objects#UNKNOWN}.
*
* @param code the code
* @param fmtArgs the argument lists to format the message
* @param locale the locale of the message to load
* @return the message; never be null
*/
public static String get(int code, Object[] fmtArgs, Locale locale) {
try {
String s = getFromBundle(code, locale);
if (s == null) return getNotFound(code, locale);
if (fmtArgs != null && fmtArgs.length > 0) {
final Object[] args = new Object[fmtArgs.length];
final Formatter formatter = _formatter;
for (int j = 0; j < fmtArgs.length; ++j) {
final Object arg = fmtArgs[j];
if (formatter != null) args[j] = formatter.format(arg);
else if (arg == null || arg == Objects.UNKNOWN) args[j] = "";
else if (arg instanceof Object[]) args[j] = Objects.toString(arg);
else args[j] = arg;
}
s = MessageFormats.format(s, args, locale);
}
return s;
} catch (Exception ex) {
log.realCause(ex);
return getNotFound(code, locale);
}
}
// -- ExecutionCleanup --//
public void cleanup(Execution exec, Execution parent, List errs) {
if (parent == null) { // the root execution of a servlet request
try {
if (errs == null || errs.isEmpty()) {
// Commit and cleanup
log.debug("Committing the database transaction: " + exec);
HibernateUtil.currentSession().getTransaction().commit();
} else {
final Throwable ex = (Throwable) errs.get(0);
if (ex instanceof StaleObjectStateException) {
// default implementation does not do any optimistic concurrency
// control; it simply rollback the transaction.
handleStaleObjectStateException(exec, (StaleObjectStateException) ex);
} else {
// default implementation log the stacktrace and then rollback
// the transaction.
handleOtherException(exec, ex);
}
}
} finally {
HibernateUtil.closeSession(); // always close it
}
}
}
/**
* Default StaleObjectStateException handler. This implementation does not implement optimistic
* concurrency control! It simply rollback the transaction.
*
* <p>Application developer might want to extends this class and override this method to do other
* things like compensate for any permanent changes during the conversation, and finally restart
* business conversation. Or maybe give the user of the application a chance to merge some of his
* work with fresh data... what can be done here depends on the applications design.
*
* @param exec the exection to clean up.
* @param ex the StaleObjectStateException being thrown (and not handled) during the execution
*/
protected void handleStaleObjectStateException(Execution exec, StaleObjectStateException ex) {
log.error("This listener does not implement optimistic concurrency control!");
rollback(exec, ex);
}