/*
* Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.wso2.carbon.das.messageflow.data.publisher.data;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.aspects.flow.statistics.publishing.PublishingFlow;
import org.wso2.carbon.das.messageflow.data.publisher.observer.MessageFlowObserver;
import java.util.HashSet;
import java.util.Set;
public class MessageFlowObserverStore {
private static final Log log = LogFactory.getLog(MessageFlowObserverStore.class);
private Set<MessageFlowObserver> observers = new HashSet<MessageFlowObserver>();
/**
* Register a custom statistics consumer to receive updates from this
* statistics store
*
* @param o The MediationStatisticsObserver instance to be notified of data updates
*/
public void registerObserver(MessageFlowObserver o) {
observers.add(o);
}
/**
* Unregister the custom statistics consumer from the mediation statistics store
*
* @param o The MediationStatisticsObserver instance to be removed
*/
public void unregisterObserver(MessageFlowObserver o) {
if (observers.contains(o)) {
observers.remove(o);
o.destroy();
}
}
void unregisterObservers() {
if (log.isDebugEnabled()) {
log.debug("Unregistering mediation statistics observers");
}
for (MessageFlowObserver o : observers) {
o.destroy();
}
observers.clear();
}
public void notifyObservers(PublishingFlow publishingFlow) {
for (MessageFlowObserver o : observers) {
try {
o.updateStatistics(publishingFlow);
} catch (Throwable t) {
log.error("Error occurred while notifying the statistics observer", t);
}
}
}
public MessageFlowObserverStore() {
}
}