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 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
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/*
 * EventBuilder.java
 *
 */

package com.sun.enterprise.admin.selfmanagement.event;

import java.util.concurrent.ConcurrentHashMap;
import com.sun.enterprise.config.serverbeans.ElementProperty;
import com.sun.enterprise.util.i18n.StringManager;
import java.util.Hashtable;

/**
 *
 * @author Sun Micro Systems, Inc
 */
public class EventBuilder {
    
    private static final EventBuilder instance = new EventBuilder( );
    
    private static final ConcurrentHashMap<String,EventAbstractFactory>
            eventFactoryMap = new ConcurrentHashMap<String,EventAbstractFactory>(10, 0.75f, 2);
    private boolean initialized = false;
    
    protected static final StringManager sm = StringManager.getManager(EventBuilder.class);
    
    /** Creates a new instance of EventBuilder */
    private EventBuilder() {
    }
    
    public static EventBuilder getInstance( ) {
        return instance;
    }
    
    public synchronized void addEventFactory(String eventType, EventAbstractFactory factory) {
        if ( eventFactoryMap.get( eventType ) == null)
            eventFactoryMap.put(eventType, factory);
    }
    
    // use static initialization to guarantee thread safety
     private static final class Initer {
         private static final Initer _Instance = new Initer();
         static Initer getIniter()  { return _Instance; }
         Initer() {
             LogEventFactory.getInstance();
             NotificationEventFactory.getInstance();
             LifeCycleEventFactory.getInstance();
             MonitorEventFactory.getInstance();
            TimerEventFactory.getInstance();
             TraceEventFactory.getInstance();
         }
     };

    
    /**
     * Given an event type, an event is returned. As of now, supported events
     * are "log","monitor","lifecycle","notification" and "timer" in PE and
     * in addition "gms" in EE.
     * @param eventType one of the supported event types
     * @param properties properties associated with the event
     * @param description event description
     * @return Event constructed event
     */
    public Event getEvent( String eventType,
            ElementProperty[] properties, String description ) {
        
        // guarantee that it's initialized
        // (better than before, but an ugly solution)
        Initer.getIniter();
        
        final EventAbstractFactory factory = eventFactoryMap.get( eventType );
        if( factory == null ) {
            throw new IllegalArgumentException(
                    sm.getString("selfmgmt_event.unknown_event_type",eventType));
        }
        
        return factory.instrumentEvent(properties, description);
    }

    public Event  getEvent( String eventType, String description,
                  Hashtable attributes, ElementProperty[] properties) {
        return getEvent(eventType,properties, description);
    }
    
    
}