private void dispatchException(Exception e, Request request) {
IDSEventListener el = request.getListener();
debugger.error(
"EventService.dispatchException() - dispatching "
+ "exception to the listener: "
+ request.getRequestID()
+ " Listener: "
+ request.getListener(),
e);
el.eventError(e.toString());
}
/**
* removes the listener from the list of Persistent Search listeners of the asynchronous seach for
* the given search ID.
*
* @param request The request returned by the addListener
* @supported.api
*/
protected void removeListener(Request request) {
LDAPConnection connection = request.getLDAPConnection();
if (connection != null) {
if (debugger.messageEnabled()) {
debugger.message(
"EventService.removeListener(): Removing "
+ "listener requestID: "
+ request.getRequestID()
+ " Listener: "
+ request.getListener());
}
try {
if ((connection != null) && (connection.isConnected())) {
connection.abandon(request.getId());
connection.disconnect();
}
} catch (LDAPException le) {
// Might have to check the reset codes and try to reset
if (debugger.warningEnabled()) {
debugger.warning(
"EventService.removeListener(): " + "LDAPException, when trying to remove listener",
le);
}
}
}
}
/** Create naming event from a change control */
private DSEvent createDSEvent(LDAPEntry entry, LDAPEntryChangeControl changeCtrl, Request req)
throws Exception {
DSEvent dsEvent = new DSEvent();
if (debugger.messageEnabled()) {
debugger.message(
"EventService.createDSEvent() - Notifying event " + "to: " + req.getListener());
}
// Get the dn from the entry
String dn = entry.getDN();
dsEvent.setID(dn);
// Get information on the type of change made
int changeType = changeCtrl.getChangeType();
dsEvent.setEventType(changeType);
// Pass the search ID as the event's change info
dsEvent.setSearchID(req.getRequestID());
// set the object class name
String className = entry.getAttribute("objectclass").toString();
dsEvent.setClassName(className);
return dsEvent;
}
/**
* Response message carries a LDAP error. Response with the code 0 (SUCCESS), should never be
* received as persistent search never completes, it has to be abandon. Referral messages are
* ignored
*/
protected boolean processResponseMessage(LDAPResponse rsp, Request request) {
_retryErrorCodes = getPropertyRetryErrorCodes(EVENT_CONNECTION_ERROR_CODES);
int resultCode = rsp.getResultCode();
if (_retryErrorCodes.contains("" + resultCode)) {
if (debugger.messageEnabled()) {
debugger.message(
"EventService.processResponseMessage() - "
+ "received LDAP Response for requestID: "
+ request.getRequestID()
+ " Listener: "
+ request.getListener()
+ "Need restarting");
}
resetErrorSearches(false);
} else if (resultCode != 0 || resultCode != LDAPException.REFERRAL) {
// If not neither of the cases then
if (resultCode == LDAPException.BUSY) {
debugger.error(
"EventService.processResponseMessage() - received error BUSY, call retryManager");
return retryManager(false);
}
LDAPException ex =
new LDAPException(
"Error result", rsp.getResultCode(), rsp.getErrorMessage(), rsp.getMatchedDN());
dispatchException(ex, request);
}
return true;
}
public void run() {
for (Iterator iter = requests.values().iterator(); iter.hasNext(); ) {
Request req = (Request) iter.next();
try {
// First add a new listener and then remove the old one
// that we do don't loose any responses to the message
// Queue. However before adding check if request list
// already has this listener initialized
if (!_requestList.containsValue(req)) {
addListener(
req.getRequester(),
req.getListener(),
req.getBaseDn(),
req.getScope(),
req.getFilter(),
req.getOperations());
}
removeListener(req);
if (clearCaches) {
// Send all entries changed notifications
// only after successful establishment of psearch
req.getListener().allEntriesChanged();
}
iter.remove();
} catch (Exception e) {
debugger.error("RetryTask", e);
// Ignore exception and retry as we are in the process of
// re-establishing the searches. Notify Listeners after the
// attempt
}
}
if (--numRetries == 0) {
debugger.error("NumRetries " + numRetries);
runPeriod = -1;
}
}
/**
* Reset all searches. Clear cache only if true is passed to argument
*
* @param clearCaches
* @return <code>true</code> if the reset was successful, otherwise <code>false</code>
*/
public synchronized boolean resetAllSearches(boolean clearCaches) {
if (_shutdownCalled) {
return false;
}
// Make a copy of the existing psearches
Hashtable tmpReqList = new Hashtable();
tmpReqList.putAll(_requestList);
_requestList.clear(); // Will be updated in addListener method
Collection reqList = tmpReqList.values();
// Clear the cache, if parameter is set
if (clearCaches && !reqList.isEmpty()) {
for (Iterator iter = reqList.iterator(); iter.hasNext(); ) {
Request req = (Request) iter.next();
IDSEventListener el = req.getListener();
el.allEntriesChanged();
}
}
// Get the list of psearches to be enabled
getListenerList();
if (_allDisabled) {
// All psearches are disabled, remove listeners if any and return
if (debugger.messageEnabled()) {
debugger.message("EventService.resetAllSearches(): " + "All psearches have been disabled");
}
if (!reqList.isEmpty()) {
for (Iterator iter = reqList.iterator(); iter.hasNext(); ) {
Request req = (Request) iter.next();
removeListener(req);
if (debugger.messageEnabled()) {
debugger.message(
"EventService.resetAllSearches(): "
+ "Psearch disabled: "
+ req.getListener().getClass().getName());
}
}
}
return true;
}
// Psearches are enabled, verify and reinitilize
// Maintain the listeners to reinitialized in tmpListenerList
Set tmpListenerList = new HashSet();
Set newListenerList = new HashSet();
for (int i = 0; i < listeners.length; i++) {
if (listeners[i] != null) {
// Check if the listener is present in reqList
boolean present = false;
for (Iterator iter = reqList.iterator(); iter.hasNext(); ) {
Request req = (Request) iter.next();
IDSEventListener el = req.getListener();
String listenerClass = el.getClass().getName();
if (listenerClass.equals(listeners[i])) {
present = true;
iter.remove();
tmpListenerList.add(req);
}
}
if (!present) {
// Add the listner object
if (debugger.messageEnabled()) {
debugger.message(
"EventService.resetAllSearches(): " + "Psearch being added: " + listeners[i]);
}
newListenerList.add(listeners[i]);
}
}
}
// Remove the listeners not configured
if (!reqList.isEmpty()) {
for (Iterator iter = reqList.iterator(); iter.hasNext(); ) {
Request req = (Request) iter.next();
removeListener(req);
if (debugger.messageEnabled()) {
debugger.message(
"EventService.resetAllSearches(): "
+ "Psearch disabled due to configuration changes: "
+ req.getListener().getClass().getName());
}
}
}
// Reset the requested list
reqList = tmpListenerList;
// Determine the number of retry attempts in case of failure
// If retry property is set to -1, retries will be done infinitely
_numRetries = getPropertyIntValue(EVENT_CONNECTION_NUM_RETRIES, _numRetries);
int retry = 1;
boolean doItAgain =
((_numRetries == -1) || ((_numRetries != 0) && (retry <= _numRetries))) ? true : false;
while (doItAgain) {
if (debugger.messageEnabled()) {
String str = (_numRetries == -1) ? "indefinitely" : Integer.toString(retry);
debugger.message("EventService.resetAllSearches(): " + "retrying = " + str);
}
// Note: Avoid setting the messageQueue to null and just
// try to disconnect the connections. That way we can be sure
// that we have not lost any responses.
for (Iterator iter = reqList.iterator(); iter.hasNext(); ) {
try {
Request request = (Request) iter.next();
// First add a new listener and then remove the old one
// that we do don't loose any responses to the message
// Queue.
addListener(
request.getRequester(),
request.getListener(),
request.getBaseDn(),
request.getScope(),
request.getFilter(),
request.getOperations());
removeListener(request);
iter.remove();
} catch (LDAPServiceException e) {
// Ignore exception and retry as we are in the process of
// re-establishing the searches. Notify Listeners after the
// attempt
if (retry == _numRetries) {
processNetworkError(e);
}
} catch (LDAPException le) {
// Ignore exception and retry as we are in the process of
// re-establishing the searches. Notify Listeners after the
// attempt
if (retry == _numRetries) {
processNetworkError(le);
}
}
}
// Check if new listeners need to be added
for (Iterator iter = newListenerList.iterator(); iter.hasNext(); ) {
String listnerClass = (String) iter.next();
try {
Class thisClass = Class.forName(listnerClass);
IDSEventListener listener = (IDSEventListener) thisClass.newInstance();
_ideListenersMap.put(listnerClass, listener);
_instance.addListener(
getSSOToken(),
listener,
listener.getBase(),
listener.getScope(),
listener.getFilter(),
listener.getOperations());
if (debugger.messageEnabled()) {
debugger.message(
"EventService.resetAllSearches() - " + "successfully initialized: " + listnerClass);
}
iter.remove();
} catch (Exception e) {
debugger.error(
"EventService.resetAllSearches() " + "Unable to start listener " + listnerClass, e);
}
}
if (reqList.isEmpty() && newListenerList.isEmpty()) {
return true;
} else {
if (_numRetries != -1) {
doItAgain = (++retry <= _numRetries) ? true : false;
if (!doItAgain) {
// remove the requests fail to be resetted
// would try to reinitialized the next time
for (Iterator iter = reqList.iterator(); iter.hasNext(); ) {
Request req = (Request) iter.next();
removeListener(req);
debugger.error(
"EventService.resetAll"
+ "Searches(): unable to restart: "
+ req.getListener().getClass().getName());
}
for (Iterator iter = newListenerList.iterator(); iter.hasNext(); ) {
String req = (String) iter.next();
debugger.error("EventService.resetAll" + "Searches(): unable add listener: " + req);
}
}
}
}
if (doItAgain) {
// Sleep before retry
sleepRetryInterval();
}
} // end while loop
return false;
}
/** Dispatch naming event to all listeners */
private void dispatchEvent(DSEvent dirEvent, Request request) {
IDSEventListener el = request.getListener();
el.entryChanged(dirEvent);
}
