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The Core Camel Java DSL based router
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.util;
import java.util.EventObject;
import java.util.List;
import org.apache.camel.CamelContext;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.Route;
import org.apache.camel.StatefulService;
import org.apache.camel.spi.EventFactory;
import org.apache.camel.spi.EventNotifier;
import org.apache.camel.spi.ManagementStrategy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Helper for easily sending event notifications in a single line of code
*
* @version
*/
public final class EventHelper {
private static final Logger LOG = LoggerFactory.getLogger(EventHelper.class);
private EventHelper() {
}
public static boolean notifyCamelContextStarting(CamelContext context) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextStartingEvent(context);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextStarted(CamelContext context) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextStartedEvent(context);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextStartupFailed(CamelContext context, Throwable cause) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextStartupFailureEvent(context, cause);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextStopping(CamelContext context) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextStoppingEvent(context);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextStopped(CamelContext context) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextStoppedEvent(context);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextStopFailed(CamelContext context, Throwable cause) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextStopFailureEvent(context, cause);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyServiceStopFailure(CamelContext context, Object service, Throwable cause) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreServiceEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createServiceStopFailureEvent(context, service, cause);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyServiceStartupFailure(CamelContext context, Object service, Throwable cause) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreServiceEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createServiceStartupFailureEvent(context, service, cause);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyRouteStarted(CamelContext context, Route route) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreRouteEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createRouteStartedEvent(route);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyRouteStopped(CamelContext context, Route route) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreRouteEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createRouteStoppedEvent(route);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyRouteAdded(CamelContext context, Route route) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreRouteEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createRouteAddedEvent(route);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyRouteRemoved(CamelContext context, Route route) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreRouteEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createRouteRemovedEvent(route);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyExchangeCreated(CamelContext context, Exchange exchange) {
if (exchange.getProperty(Exchange.NOTIFY_EVENT, false, Boolean.class)) {
// do not generate events for an notify event
return false;
}
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
// optimise for loop using index access to avoid creating iterator object
for (int i = 0; i < notifiers.size(); i++) {
EventNotifier notifier = notifiers.get(i);
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreExchangeEvents() || notifier.isIgnoreExchangeCreatedEvent()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createExchangeCreatedEvent(exchange);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyExchangeDone(CamelContext context, Exchange exchange) {
if (exchange.getProperty(Exchange.NOTIFY_EVENT, false, Boolean.class)) {
// do not generate events for an notify event
return false;
}
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
// optimise for loop using index access to avoid creating iterator object
for (int i = 0; i < notifiers.size(); i++) {
EventNotifier notifier = notifiers.get(i);
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreExchangeEvents() || notifier.isIgnoreExchangeCompletedEvent()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createExchangeCompletedEvent(exchange);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyExchangeFailed(CamelContext context, Exchange exchange) {
if (exchange.getProperty(Exchange.NOTIFY_EVENT, false, Boolean.class)) {
// do not generate events for an notify event
return false;
}
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
// optimise for loop using index access to avoid creating iterator object
for (int i = 0; i < notifiers.size(); i++) {
EventNotifier notifier = notifiers.get(i);
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreExchangeEvents() || notifier.isIgnoreExchangeFailedEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createExchangeFailedEvent(exchange);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyExchangeFailureHandling(CamelContext context, Exchange exchange, Processor failureHandler,
boolean deadLetterChannel, String deadLetterUri) {
if (exchange.getProperty(Exchange.NOTIFY_EVENT, false, Boolean.class)) {
// do not generate events for an notify event
return false;
}
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
// optimise for loop using index access to avoid creating iterator object
for (int i = 0; i < notifiers.size(); i++) {
EventNotifier notifier = notifiers.get(i);
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreExchangeEvents() || notifier.isIgnoreExchangeFailedEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createExchangeFailureHandlingEvent(exchange, failureHandler, deadLetterChannel, deadLetterUri);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyExchangeFailureHandled(CamelContext context, Exchange exchange, Processor failureHandler,
boolean deadLetterChannel, String deadLetterUri) {
if (exchange.getProperty(Exchange.NOTIFY_EVENT, false, Boolean.class)) {
// do not generate events for an notify event
return false;
}
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
// optimise for loop using index access to avoid creating iterator object
for (int i = 0; i < notifiers.size(); i++) {
EventNotifier notifier = notifiers.get(i);
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreExchangeEvents() || notifier.isIgnoreExchangeFailedEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createExchangeFailureHandledEvent(exchange, failureHandler, deadLetterChannel, deadLetterUri);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyExchangeRedelivery(CamelContext context, Exchange exchange, int attempt) {
if (exchange.getProperty(Exchange.NOTIFY_EVENT, false, Boolean.class)) {
// do not generate events for an notify event
return false;
}
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
// optimise for loop using index access to avoid creating iterator object
for (int i = 0; i < notifiers.size(); i++) {
EventNotifier notifier = notifiers.get(i);
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreExchangeEvents() || notifier.isIgnoreExchangeFailedEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createExchangeRedeliveryEvent(exchange, attempt);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyExchangeSending(CamelContext context, Exchange exchange, Endpoint endpoint) {
if (exchange.getProperty(Exchange.NOTIFY_EVENT, false, Boolean.class)) {
// do not generate events for an notify event
return false;
}
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
// optimise for loop using index access to avoid creating iterator object
for (int i = 0; i < notifiers.size(); i++) {
EventNotifier notifier = notifiers.get(i);
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreExchangeEvents() || notifier.isIgnoreExchangeSendingEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createExchangeSendingEvent(exchange, endpoint);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyExchangeSent(CamelContext context, Exchange exchange, Endpoint endpoint, long timeTaken) {
if (exchange.getProperty(Exchange.NOTIFY_EVENT, false, Boolean.class)) {
// do not generate events for an notify event
return false;
}
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
// optimise for loop using index access to avoid creating iterator object
for (int i = 0; i < notifiers.size(); i++) {
EventNotifier notifier = notifiers.get(i);
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreExchangeEvents() || notifier.isIgnoreExchangeSentEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createExchangeSentEvent(exchange, endpoint, timeTaken);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextSuspending(CamelContext context) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextSuspendingEvent(context);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextSuspended(CamelContext context) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextSuspendedEvent(context);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextResuming(CamelContext context) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextResumingEvent(context);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextResumed(CamelContext context) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextResumedEvent(context);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
public static boolean notifyCamelContextResumeFailed(CamelContext context, Throwable cause) {
ManagementStrategy management = context.getManagementStrategy();
if (management == null) {
return false;
}
EventFactory factory = management.getEventFactory();
if (factory == null) {
return false;
}
List notifiers = management.getEventNotifiers();
if (notifiers == null || notifiers.isEmpty()) {
return false;
}
boolean answer = false;
EventObject event = null;
for (EventNotifier notifier : notifiers) {
if (notifier.isDisabled()) {
continue;
}
if (notifier.isIgnoreCamelContextEvents()) {
continue;
}
if (event == null) {
// only create event once
event = factory.createCamelContextResumeFailureEvent(context, cause);
if (event == null) {
// factory could not create event so exit
return false;
}
}
answer |= doNotifyEvent(notifier, event);
}
return answer;
}
private static boolean doNotifyEvent(EventNotifier notifier, EventObject event) {
// only notify if notifier is started
boolean started = true;
if (notifier instanceof StatefulService) {
started = ((StatefulService) notifier).isStarted();
}
if (!started) {
LOG.debug("Ignoring notifying event {}. The EventNotifier has not been started yet: {}", event, notifier);
return false;
}
if (!notifier.isEnabled(event)) {
LOG.trace("Notifier: {} is not enabled for the event: {}", notifier, event);
return false;
}
try {
notifier.notify(event);
} catch (Throwable e) {
LOG.warn("Error notifying event " + event + ". This exception will be ignored. ", e);
}
return true;
}
}