org.glassfish.admin.amx.util.jmx.NotificationBuilder Maven / Gradle / Ivy

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// Portions Copyright [2019] PAyara Foundation and/or affiliates

package org.glassfish.admin.amx.util.jmx;

import javax.management.Notification;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

/**
Base class for building AMX Notifications.  AMX Notifications
all place a Map in the userData field.  This class takes care
of building Notifications with correct time stamp, sequence number,
etc.  It also enforces certain conventions.

A convenience routine is provided for adding additional fields to
the Map--putMapData().
 */
public class NotificationBuilder
{
    private long mSequenceNumber = 0;

    private final String mNotificationType;

    private final Object mSource;

    protected synchronized long nextSequenceNumber() {
        return (mSequenceNumber++);
    }

    public NotificationBuilder(final String notificationType, final Object source) {
        mNotificationType = notificationType;
        mSource = source;
    }

    public final String getNotificationType() {
        return (mNotificationType);
    }

    public final Object getSource() {
        return (mSource);
    }

    protected final long now() {
        return (System.currentTimeMillis());
    }

    /**
    Build a new Notification with an existing Map.
     */
    public Notification buildNewWithMap(final String message, final Map userDataMap) {
        final Notification notif = new Notification(mNotificationType, mSource, nextSequenceNumber(), now(), message);

        if (userDataMap != null) {
            notif.setUserData(userDataMap);
        } else {
            notif.setUserData(new HashMap<>());
        }

        return (notif);
    }

    /**
    Build a new Notification without any values in its Map
    and no message.
     */
    public Notification buildNew()
    {
        return buildNew(mNotificationType);
    }

    /**
    Build a new Notification without any values in its Map.
    @param message
     */
    public Notification buildNew(final String message)
    {
        return buildNewWithMap(message, null);
    }

    /**
    Put a single key/value pair into the user data Map.
     */
    public static final void putMapData(final Notification notif, final String keyToInsert, final Serializable valueToInsert) {
        final Map userData = JMXUtil.getUserDataMapString_Serializable(notif);

        userData.put(keyToInsert, valueToInsert);
    }

    /**
    Put all key/value pairs into the user data Map.
     */
    public static final  void putAllMapData(final Notification notif, final Map additionalUserData) {
        final Map userData = JMXUtil.getUserDataMapString_Serializable(notif);

        userData.putAll(additionalUserData);
    }

}