/*
* Copyright 2015 The Apache Software Foundation.
*
* Licensed 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.registry.event.core.internal;
import org.apache.axiom.om.OMElement;
import org.wso2.carbon.registry.event.core.EventBroker;
import org.wso2.carbon.registry.event.core.EventBrokerFactory;
import org.wso2.carbon.registry.event.core.topic.TopicManager;
import org.wso2.carbon.registry.event.core.topic.TopicManagerFactory;
import org.wso2.carbon.registry.event.core.delivery.DeliveryManagerFactory;
import org.wso2.carbon.registry.event.core.exception.EventBrokerConfigurationException;
import org.wso2.carbon.registry.event.core.util.EventBrokerConstants;
import org.wso2.carbon.registry.event.core.internal.util.JavaUtil;
import org.wso2.carbon.registry.event.core.subscription.SubscriptionManagerFactory;
import javax.xml.namespace.QName;
import java.util.concurrent.*;
/**
* factory to create new carbon event brokers
*/
public class CarbonEventBrokerFactory implements EventBrokerFactory {
public static final String EB_MIN_SPARE_THREADS = "minSpareThreads";
public static final String EB_MAX_THREADS = "maxThreads";
public static final String EB_MAX_QUEUED_REQUESTS = "maxQueuedRequests";
public static final String EB_KEEP_ALIVE_TIME = "keepAliveTime";
public EventBroker getEventBroker(OMElement config) throws EventBrokerConfigurationException {
CarbonEventBroker carbonEventBroker = new CarbonEventBroker();
// setting the topic manager
OMElement topicManagerElement =
config.getFirstChildWithName(new QName(EventBrokerConstants.EB_CONF_NAMESPACE,
EventBrokerConstants.EB_CONF_ELE_TOPIC_MANAGER));
TopicManagerFactory topicManagerFactory =
(TopicManagerFactory) JavaUtil.getObject(topicManagerElement);
TopicManager topicManager = topicManagerFactory.getTopicManager(topicManagerElement);
carbonEventBroker.setTopicManager(topicManager);
// setting the subscription manager
OMElement subscriptionManager =
config.getFirstChildWithName(new QName(EventBrokerConstants.EB_CONF_NAMESPACE,
EventBrokerConstants.EB_CONF_ELE_SUBSCRIPTION_MANAGER));
SubscriptionManagerFactory subscriptionManagerFactory =
(SubscriptionManagerFactory) JavaUtil.getObject(subscriptionManager);
carbonEventBroker.setSubscriptionManager(
subscriptionManagerFactory.getSubscriptionManager(subscriptionManager));
// setting the delivery manager
OMElement delivaryManager =
config.getFirstChildWithName(new QName(EventBrokerConstants.EB_CONF_NAMESPACE,
EventBrokerConstants.EB_CONF_ELE_DELIVERY_MANAGER));
DeliveryManagerFactory delivaryManagerfactory =
(DeliveryManagerFactory) JavaUtil.getObject(delivaryManager);
carbonEventBroker.setDeliveryManager(
delivaryManagerfactory.getDeliveryManger(delivaryManager));
// getting the event publisher properties and setting the executor
OMElement eventPublisher = config.getFirstChildWithName(new QName(EventBrokerConstants.EB_CONF_NAMESPACE,
EventBrokerConstants.EB_CONF_ELE_EVENT_PUBLISHER));
int minSpareThreads = Integer.parseInt(JavaUtil.getValue(eventPublisher, EB_MIN_SPARE_THREADS));
int maxThreads = Integer.parseInt(JavaUtil.getValue(eventPublisher, EB_MAX_THREADS));
int maxQueuedRequests =
Integer.parseInt(JavaUtil.getValue(eventPublisher, EB_MAX_QUEUED_REQUESTS));
long keepAliveTime = Integer.parseInt(JavaUtil.getValue(eventPublisher, EB_KEEP_ALIVE_TIME));
BlockingQueue<Runnable> queue = new ArrayBlockingQueue<Runnable>(maxQueuedRequests);
ExecutorService executor = new ThreadPoolExecutor(minSpareThreads, maxThreads,
keepAliveTime, TimeUnit.MILLISECONDS, queue);
carbonEventBroker.setExecutor(executor);
carbonEventBroker.init();
return carbonEventBroker;
}
}