ExtendableResourceActionHit.java

/*
 * Copyright (c) 2002-2016, Mairie de Paris
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice
 *     and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice
 *     and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *
 *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * License 1.0
 */
package fr.paris.lutece.portal.service.resource;

import fr.paris.lutece.portal.service.spring.SpringContextService;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

/**
 * Class to notify listeners of actions performed on resources. Listeners keep at least track of the number of actions performed over a given resource.
 */
public final class ExtendableResourceActionHit
{
    /**
     * Download action
     */
    public static final String ACTION_DOWNLOAD = "download";

    /**
     * Creation action
     */
    public static final String ACTION_CREATION = "creation";

    /**
     * Update action
     */
    public static final String ACTION_UPDATE = "update";

    /**
     * Archive action
     */
    public static final String ACTION_ARCHIVE = "archive";

    /**
     * Delete action
     */
    public static final String ACTION_DELETE = "delete";
    private static volatile ExtendableResourceActionHit _instance;

    /**
     * Private constructor
     */
    private ExtendableResourceActionHit( )
    {
    }

    /**
     * Get the service instance
     * 
     * @return The instance of the service
     */
    public static ExtendableResourceActionHit getInstance( )
    {
        if ( _instance == null )
        {
            synchronized( ExtendableResourceActionHit.class )
            {
                _instance = new ExtendableResourceActionHit( );
            }
        }

        return _instance;
    }

    /**
     * Get the total number of hit associated to a given action name and resource type
     * 
     * @param strActionName
     *            The name of the action to get the number of hit of
     * @param strExtendableResourceType
     *            The resource type to get the hit of
     * @return The number of hit, or 0 if this action has no hit for this resource type
     */
    public int getActionHit( String strActionName, String strExtendableResourceType )
    {
        int nResult = 0;

        for ( IExtendableResourceActionHitListener listener : SpringContextService.getBeansOfType( IExtendableResourceActionHitListener.class ) )
        {
            nResult += listener.getActionHit( strActionName, strExtendableResourceType );
        }

        return nResult;
    }

    /**
     * Get the list of action names associated with a number of hit for a given resource
     * 
     * @param strExtendableResourceId
     *            The id of the resource
     * @param strExtendableResourceType
     *            The type of the resource
     * @return A map containing associations between action names and hit number
     */
    public Map<String, Integer> getResourceHit( String strExtendableResourceId, String strExtendableResourceType )
    {
        Map<String, Integer> mapActionHit = new HashMap<String, Integer>( );

        for ( IExtendableResourceActionHitListener listener : SpringContextService.getBeansOfType( IExtendableResourceActionHitListener.class ) )
        {
            for ( Entry<String, Integer> entry : listener.getResourceHit( strExtendableResourceId, strExtendableResourceType ).entrySet( ) )
            {
                if ( mapActionHit.containsKey( entry.getKey( ) ) )
                {
                    mapActionHit.put( entry.getKey( ), mapActionHit.get( entry.getKey( ) ) + entry.getValue( ) );
                }
                else
                {
                    mapActionHit.put( entry.getKey( ), entry.getValue( ) );
                }
            }
        }

        return mapActionHit;
    }

    /**
     * Get the number of hit associated with a resource and an action name
     * 
     * @param strExtendableResourceId
     *            The id of the resource
     * @param strExtendableResourceType
     *            The type of the resource
     * @param strActionName
     *            The name of the action
     * @return The number of hit, or 0 if the resource has no hit for this action
     */
    public int getResourceActionHit( String strExtendableResourceId, String strExtendableResourceType, String strActionName )
    {
        int nResult = 0;

        for ( IExtendableResourceActionHitListener listener : SpringContextService.getBeansOfType( IExtendableResourceActionHitListener.class ) )
        {
            nResult += listener.getResourceActionHit( strExtendableResourceId, strExtendableResourceType, strActionName );
        }

        return nResult;
    }

    /**
     * Notify every listeners that an action has been performed on a resource
     * 
     * @param strExtendableResourceId
     *            The id of the resource the action was performed on
     * @param strExtendableResourceType
     *            The type of the resource the action was performed on
     * @param strActionName
     *            The name of the action that was performed on the resource. Action names can be any strings, but the class {@link ExtendableResourceActionHit}
     *            exposes standard action names.
     */
    public void notifyActionOnResource( String strExtendableResourceId, String strExtendableResourceType, String strActionName )
    {
        for ( IExtendableResourceActionHitListener listener : SpringContextService.getBeansOfType( IExtendableResourceActionHitListener.class ) )
        {
            listener.notifyActionOnResource( strExtendableResourceId, strExtendableResourceType, strActionName );
        }
    }
}