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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2016-2017 Payara Foundation and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://github.com/payara/Payara/blob/master/LICENSE.txt
 * See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * The Payara Foundation designates this particular file as subject to the "Classpath"
 * exception as provided by the Payara Foundation in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
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 */
package fish.payara.jmx.monitoring;

import fish.payara.nucleus.notification.domain.EventSource;
import fish.payara.nucleus.notification.domain.NotificationEvent;
import fish.payara.nucleus.notification.domain.NotificationEventFactory;
import fish.payara.nucleus.notification.domain.NotifierExecutionOptions;
import fish.payara.nucleus.notification.NotificationService;
import fish.payara.nucleus.notification.service.NotificationEventFactoryStore;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.management.MBeanServer;

/**
 * The runnable class which gathers monitoring info from a list of MonitoringJob objects and builds a log string from it.
 *
 * @since 4.1.1.163
 * @author savage
 */
public class MonitoringFormatter implements Runnable {

    private static final Logger LOGGER = Logger.getLogger(MonitoringFormatter.class.getCanonicalName());
    private final String LOGMESSAGE_PREFIX = "PAYARA-MONITORING: ";

    private final MBeanServer mBeanServer;
    private final List jobs;
    private final MonitoringService monitoringService;
    private final NotificationEventFactoryStore eventFactoryStore;
    private final NotificationService notificationService;

    /**
     * Constructor for the MonitoringFormatter class.
     *
     * @param mBeanServer The MBeanServer to monitor.
     * @param jobs List of monitoring jobs to perform.
     * @param monitoringService the monitoring service
     * @param store the store that holds the various event factories that are needed to build notification events
     * @param notificationService the notification service containing all the notifiers
     */
    //This is done this way and not through injection as the result is a hk2 circular dependency error as this class
    //is also used in MonitoringService and each cannot be injected into the other
    public MonitoringFormatter(MBeanServer mBeanServer, List jobs, MonitoringService monitoringService, NotificationEventFactoryStore store,
            NotificationService notificationService) {
        this.mBeanServer = mBeanServer;
        this.jobs = jobs;
        this.monitoringService = monitoringService;
        this.eventFactoryStore = store;
        this.notificationService = notificationService;
    }

    /**
     * Class runnable method. Calls getMonitoringInfo on all MonitoringJobs passing the MBeanServer. Uses the results to build a String for the log message.
     */
    @Override
    public void run() {
        StringBuilder monitoringString = new StringBuilder();

        monitoringString.append(LOGMESSAGE_PREFIX);

        for (MonitoringJob job : jobs) {
            monitoringString.append(job.getMonitoringInfo(mBeanServer));
        }

        sendNotification(Level.INFO, monitoringString.toString(), jobs.toArray());
    }

    /**
     * Sends a notification to all notifiers enabled with the monitoring service
     * 
     * The subject of the notification will be {@code PAYARA-MONITORING:}
     * @since 4.1.2.174
     * @param level Log level to notification at
     * @param message The message to send
     * @param parameters An array of the objects that the notification is about i.e. the Mbeans being monitored
     */
    private void sendNotification(Level level, String message, Object[] parameters) {

        if (monitoringService.getNotifierExecutionOptionsList() != null) {
            for (NotifierExecutionOptions options : monitoringService.getNotifierExecutionOptionsList()) {
                if (options.isEnabled()) {
                    NotificationEventFactory notificationEventFactory = eventFactoryStore.get(options.getNotifierType());
                    NotificationEvent event = notificationEventFactory.buildNotificationEvent(level, LOGMESSAGE_PREFIX, message, parameters);
                    notificationService.notify(EventSource.MONITORING, event);
                }
            }
        }

    }

}