Communication entre portlets : le système d'évènements [Tutoriel]

**natoine** · 13/04/2010, 09h38

Voilà un nouvel article/tutoriel sur la communication entre portlets, JSR 286.
http://natoine.developpez.com/tutoriels/java/portlet/

A vos commentaires, retours, questions.

**keyga** · 25/08/2010, 15h56

Très bon tutoriel, il m'a bien aidé

J'ai par contre un peu de mal avec la sérialisation... Pourriez-vous apporter quelques précisions ?

**keyga** · 26/08/2010, 09h30

Ok j'ai réussi en m'aidant de ce lien (réponse de OscarRyz) :
http://stackoverflow.com/questions/1...-into-a-string

Est-ce une bonne manière de faire ?

**natoine** · 29/08/2010, 13h22

tu pourrais me fournir un exemple de code précisant ton problème ?

Passer un objet plutôt qu'une String en event entre portlets est assez simple mais il faut bien respecter deux choses absolument :
* Annoter la classe à transmettre en event avec le tag xmlRootElement
* Que cette classe soit serializable (c'est à dire qu'elle implémente l'interface Serializable)

Par exemple :

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@XmlRootElement
public class Agent implements Serializable

**keyga** · 30/08/2010, 18h00

Donc par exemple pour envoyer une information à une autre portlet on utilise cette méthode. Mais on est limité à une simple String.

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public void sendEvent(ActionRequest request, ActionResponse response) throws IOException
{
	String str = "user89";
	response.setEvent("event_newUserConnected", str);
}

Pour transmettre un objet, j'ai été obligé de sérialiser l'objet dans une string puisqu'on ne peut pas modifier le prototype de setEvent. De la manière suivante :

Classe sérialisable

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@XmlRootElement
public class User implements Serializable{
	private static final long serialVersionUID = 1L;
 
	private String _name;
	private String _surname;
 
	public User(){
		this("Name", "Surname");
	}
 
	public User(String name, String surname){
		_name = name;
		_surname = surname;
	}
 
	public String name(){
		return _name;
	}
 
	public String surname(){
		return _surname;
	}
}

Envoi de l'event

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public void sendEvent(ActionRequest request, ActionResponse response) throws IOException
{
        User user = new User("Jean-paul", "Dupont");
 
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream( baos );
        oos.writeObject(user);
        oos.close();
        String str_obj = new String(Base64Coder.encode(baos.toByteArray())
        response.setEvent("event_newUserConnected", str_obj);
}

Reception de l'event

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public void processEvent(EventRequest request, EventResponse response) {
	Event event = request.getEvent();
	if (event.getName().equals("event_newUserConnected")) {
                byte [] data = Base64Coder.decode((String) event.getValue());
                ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(data));
                User user = (User)ois.readObject();
                ois.close();
	}

Avec Base64Coder dispo ici : http://www.source-code.biz/base64cod...Coder.java.txt

Bon je ne suis pas sur de ce code, je l'ai retapé, je ne l'utilise plus. Actuellement j'utilise les variables de session. Quoiqu'il en soit je vais quand meme surement m'en reservir à l'avenir donc si tu as des remarques sur la méthode...

**natoine** · 30/08/2010, 21h07

Je pense que tu n'appelles pas la bonne méthode setEvent.
Ou alors tu n'utilises pas la bonne api.

J'utilise maven et ma dépendance à l'api portlet JSR 286 :

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<dependency>
			<groupId>javax.portlet</groupId>
			<artifactId>portlet-api</artifactId>
			<version>2.0</version>
			<scope>provided</scope>
		</dependency>

Maintenant voilà un exemple complet de ce que je fais. Je n'ai pas nettoyé mon code. Tu as tout au complet et donc beaucoup de choses en trop...

Le code de la classe qui sera passé en event :

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@Entity
@Table(name = "SELECTIONHTML")
@XmlRootElement
public class SelectionHTML extends Selection implements HTMLContentable
{
	@Column(name = "XPOINTERBEGIN" , nullable=false)
	private String xpointerBegin;
 
	@Column(name = "XPOINTEREND" , nullable=false)
	private String xpointerEnd;
 
	@Lob
	@Column(name = "HTMLCONTENT" , nullable=false)
	private String HTMLContent;
 
	/**
         * Gets the HTML Content of the html Selection
         * @return
         */
	public String getHTMLContent() {
		return HTMLContent;
	}
	/**
         * Sets the HTML Content of the html Selection
         */
	public void setHTMLContent(String hTMLContent) {
		HTMLContent = hTMLContent;
	}	
	/**
         * Gets the XPointerBegin of the html Selection
         * @return
         */
	public String getXpointerBegin() {
		return xpointerBegin;
	}
	/**
         * Sets the XPointerBegin of the html Selection
         * @param xpointerBegin
         */
	public void setXpointerBegin(String xpointerBegin) {
		this.xpointerBegin = xpointerBegin;
	}
	/**
         * Gets the XPointerEnd of the html Selection
         * @return
         */
	public String getXpointerEnd() {
		return xpointerEnd;
	}
	/**
         * Sets the XPointerEnd of the html Selection
         * @param xpointerEnd
         */
	public void setXpointerEnd(String xpointerEnd) {
		this.xpointerEnd = xpointerEnd;
	}
}

J'utilise aussi hibernate pour la persistence, d'où les annotations JPA dans mon code.

Le code de la classe qui envoie l'event :

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public class PortletWebBrowser extends GenericPortlet implements EventPortlet
{
	private static String defaultURL = "http://www.google.com";
	private static String defaultHeight = "200px";
	private static String defaultWidth = "100%";
	private static String defaultMessage = "There is a problem with your URL";
 
	public void processAction(ActionRequest request, ActionResponse response)
			throws PortletException, PortletSecurityException, IOException {
		String op = request.getParameter("op");
		StringBuffer message = new StringBuffer(1024);
		if ((op != null) && (op.trim().length() > 0)) 
		{
			//Mise à jour de l'url dans la barre de navigation de la portlet en View
			if (op.equalsIgnoreCase("go")) 
			{
				doGo(request , response , message);
				return;
			} 
			//il y a eu une action de sélection pour annotation
			else if(op.equalsIgnoreCase("selection"))
			{
				doSelection(request , response);
				return;
			}
			//mise à jour des données par interface Edit
			else if (op.equalsIgnoreCase("update")) 
			{
				doUpdate(request , response , message);
				return;
			}
			else if (op.equalsIgnoreCase("cancel")) 
			{
				doCancel(response);
				return;
			} 
			else if(op.equalsIgnoreCase("Page"))
			{
				doPage(request, response);
				return ;
			}
			else
			{
				System.out.println("[BrowserPortlet.processAction 2]" + op);
				message.append("Operation not found");
			}
		} 
		else 
		{
			System.out.println("[BrowserPortlet.processAction 3]" + op);
			message.append("Operation is null");
		}
		System.out.println("[BrowserPortlet.processAction 4]" + op);
		response.setRenderParameter("message", message.toString());
		response.setPortletMode(PortletMode.VIEW);
	}
 
	public void doView(RenderRequest request, RenderResponse response) {
		try {
		setRenderAttributes(request);
			response.setContentType("text/html");
			PortletRequestDispatcher prd = getPortletContext()
					.getRequestDispatcher("/WEB-INF/jsp/browser.jsp");
			prd.include(request, response);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
 
	public void doEdit(RenderRequest request, RenderResponse response)
			throws IOException, PortletException {
		setRenderAttributes(request);
		response.setContentType("text/html");
		response.setTitle("Edit");
		PortletRequestDispatcher prd = getPortletContext()
				.getRequestDispatcher("/WEB-INF/jsp/edit.jsp");
		prd.include(request, response);
	}
 
	private void setRenderAttributes(RenderRequest request) 
	{
		String currentURL = defaultURL;
		request.getPortletSession().setAttribute("default_url", defaultURL, request.getPortletSession().APPLICATION_SCOPE);
		request.setAttribute("default_url", defaultURL);
		if(request.getParameter("height")!=null) request.setAttribute("height" , request.getParameter("height"));
		else request.setAttribute("height", PortletWebBrowser.defaultHeight);
		if(request.getParameter("width")!=null) request.setAttribute("width" , request.getParameter("width"));
		else request.setAttribute("width", PortletWebBrowser.defaultWidth);
		if(request.getParameter("message")!=null) request.setAttribute("message" , request.getParameter("message"));
		else request.setAttribute("message", PortletWebBrowser.defaultMessage);
		if(request.getPortletSession().getAttribute("current_url")!=null) currentURL = (String)request.getPortletSession().getAttribute("current_url");
		request.setAttribute("url", currentURL);
		String _clean_html = HTMLmanager.getCleanHTML(currentURL); //HTMLParser.toStringFromHTML(currentURL) ;
		/*if(request.getParameter("url")!=null) currentURL = request.getParameter("url");
		request.setAttribute("url", currentURL);
		String _clean_html = HTMLmanager.getCleanHTML(currentURL); //HTMLParser.toStringFromHTML(currentURL) ;
		*/
		//on set la liste de highlights
		ArrayList<HighlightSelectionHTML> _highlights ;
		if(request.getPortletSession().getAttribute("highlights")!=null)
			_highlights = ((ArrayList<HighlightSelectionHTML>)request.getPortletSession().getAttribute("highlights"));
		else _highlights = new ArrayList<HighlightSelectionHTML>();
		//pour passer les highlights au JSP
		//request.setAttribute("highlights" , _highlights);
		//processes all the highlights to add them in html
		//System.out.println("[PortletWebBrowser.setRenderAttributes] html : " + _clean_html);
		//System.out.println("[PortletWebBrowser.setRenderAttributes] highlights size : " + _highlights);
		_clean_html = HTMLmanager.colorHighlights(_clean_html, _highlights);
		request.setAttribute("html" , _clean_html);
	}
 
	private void doGo(ActionRequest request, ActionResponse response , StringBuffer message) throws ReadOnlyException, ValidatorException, IOException, PortletModeException
	{
		boolean save = true;
		//PortletPreferences prefs = request.getPreferences();
		String url = request.getParameter("url");
		if (!url.startsWith("http://")) 
		{
			save = false;
			message.append("URLs must start with 'http://'<br/>");
			response.setRenderParameter("message", message.toString());
			response.setPortletMode(PortletMode.VIEW);
		} 
		if (save) 
		{
			request.getPortletSession().removeAttribute("highlights");
			//response.setRenderParameter("url", url.toLowerCase());
			request.getPortletSession().setAttribute("current_url", url.toLowerCase());
			this.sendEvent("loadedurl", url.toLowerCase(), response);
			response.setPortletMode(PortletMode.VIEW);
			request.getPortletSession().removeAttribute("highlights");
		}
	}
 
	private void sendEvent(String _event_type , Serializable _event_object , ActionResponse response)
	{
		System.out.println("[BrowserPortlet.sendEvent] type : " + _event_type + " value : " + _event_object);
		response.setEvent(_event_type, _event_object);
	}
 
	private void doSelection(ActionRequest request , ActionResponse response)
	{
		System.out.println("[BrowserPortlet.doSelection]");
		String url = request.getParameter("url") ;
		String title = HTMLmanager.getTitlePage(url) ;
		SelectionHTML _selection_html = new SelectionHTML();
		_selection_html.setHTMLContent(request.getParameter("text_selection"));
		_selection_html.setXpointerBegin(request.getParameter("xpointer_start"));
		_selection_html.setXpointerEnd(request.getParameter("xpointer_end"));
		_selection_html.setContextCreation("PortletWebBrowser");
		_selection_html.setCreation(new Date());
		_selection_html.setLabel("sélection de : " + title);
		//_selection_html.setRepresentsResource(representsResource);
		WebPage selectionOrigin = new WebPage();
		URI _access = new URI();
		_access.setEffectiveURI(url);
		selectionOrigin.setAccess(_access);
		selectionOrigin.setContextCreation("PortletWebBrowser");
		selectionOrigin.setCreation(new Date());
		selectionOrigin.setHTMLContent(HTMLmanager.getCleanHTML(url));
		selectionOrigin.setLabel(title);
		selectionOrigin.setPrincipalURL(_access);
		selectionOrigin.setRepresentsResource(_access);
		_selection_html.setSelectionOrigin(selectionOrigin);
		HighlightSelectionHTML _highLight = new HighlightSelectionHTML();
		_highLight.setSelection(_selection_html);
		_highLight.setStyle("background-color:yellow;");
		_highLight.setInfo("sélection en attente d'annotation");
		_highLight.setId(generateHighlightId(request));
		//_selection_html.setClassname("new_selection");
		this.sendEvent("selection", _highLight, response);
		//ajouter la nouvelle sélection à la liste courante
		ArrayList<HighlightSelectionHTML> _highlights ;
		if(request.getPortletSession().getAttribute("highlights")!=null) 
		{
			_highlights = (ArrayList<HighlightSelectionHTML>)request.getPortletSession().getAttribute("highlights") ;
		}
		else _highlights = new ArrayList<HighlightSelectionHTML>();
		_highlights.add(_highLight);
		request.getPortletSession().setAttribute("highlights" , _highlights);
		//response.setRenderParameter("url", url);
		request.getPortletSession().setAttribute("current_url", url);
	}
 
	private void doPage(ActionRequest request , ActionResponse response)
	{
		System.out.println("[BrowserPortlet.doPage]");
		String url = request.getParameter("url") ;
		WebPage _page = new WebPage();
		URI _access = new URI();
		_access.setEffectiveURI(url);
		_page.setAccess(_access);
		_page.setContextCreation("PortletWebBrowser");
		_page.setCreation(new Date());
		_page.setHTMLContent(HTMLmanager.getCleanHTML(url));
		String title = HTMLmanager.getTitlePage(url) ;
		_page.setLabel(title);
		_page.setPrincipalURL(_access);
		_page.setRepresentsResource(_access);
		this.sendEvent("page", _page, response);
		//response.setRenderParameter("url", url);
		request.getPortletSession().setAttribute("current_url", url);
	}
 
	private void doUpdate(ActionRequest request, ActionResponse response , StringBuffer message) throws ReadOnlyException, ValidatorException, IOException, PortletModeException
	{
		String url = request.getParameter("default-url");
		//System.out.println("[BrowserPortlet.doUpdate] url : " + url);
		String height = request.getParameter("height");
		String width = request.getParameter("width");
		String noMessage = request.getParameter("nomessage");
		boolean px = false;
		boolean save = true ;
		// boolean save = true;
		if ((url != null) && (height != null) && (width != null) && (noMessage != null)) 
		{
			if (!url.startsWith("http://")) 
			{
				save = false;
				message.append("URLs must start with 'http://'<br/>");
			} 
			try 
			{
				if (height.endsWith("px")) 
				{
					height = height.substring(0, height.length() - 2);
				}
				Integer.parseInt(height);
			} 
			catch (NumberFormatException nfe) 
			{
				// Bad height value
				save = false;
				message.append("Height must be an integer<br/>");
			}
			try 
			{
				if (width.endsWith("px")) 
				{
					px = true;
					width = width.substring(0, width.length() - 2);
				} 
				else if (width.endsWith("%")) 
				{
					width = width.substring(0, width.length() - 1);
				}
				Integer.parseInt(width);
			}
			catch (NumberFormatException nfe) 
			{
				// Bad height value
				save = false;
				message.append("Width must be an integer<br/>");
			}
			if (save) 
			{
				//System.out.println("[BrowserPortlet.doUpdate] save");
				response.setRenderParameter("height", height + "px");
				response.setRenderParameter("width", px ? width + "px" : width + "%");
				//response.setRenderParameter("url", url);
				request.getPortletSession().setAttribute("current_url", url);
				this.sendEvent("url", url, response);
				response.setRenderParameter("message", noMessage);
				defaultURL = url ;
				sendEvent("default_url", url, response);
				request.getPortletSession().setAttribute("default_url", url, request.getPortletSession().APPLICATION_SCOPE);
				defaultHeight = height + "px" ;
				defaultWidth = px ? width + "px" : width + "%" ;
				defaultMessage = noMessage ;
				response.setPortletMode(PortletMode.VIEW);
				return;
			}
			response.setRenderParameter("message", message.toString());
			response.setPortletMode(PortletMode.VIEW);
		}
	}
 
	private void doCancel(ActionResponse response) throws PortletModeException
	{
		response.setPortletMode(PortletMode.VIEW);
	}
 
	public void processEvent(EventRequest request, EventResponse response)
	{
		Event event = request.getEvent();
		System.out.println("[PortletWebBrowser.processEvent] event : " + event.getName());
		if(event.getName().equals("tohighlight"))
		{
			Object _highlight_event = event.getValue();
			//Récupérer la collection de highlights
			if(_highlight_event instanceof HighlightSelectionHTML)
			{
				ArrayList<HighlightSelectionHTML> _hightlights = (ArrayList<HighlightSelectionHTML>)request.getPortletSession().getAttribute("highlights");
				if(_hightlights == null) _hightlights = new ArrayList<HighlightSelectionHTML>();
				_hightlights.add((HighlightSelectionHTML)_highlight_event);
				request.getPortletSession().setAttribute("highlights" , _hightlights);
			}
		}
		if(event.getName().equals("todelete"))
		{
			System.out.println("[PortletWebBrowser.processEvent] event to delete");
			if(event.getValue() instanceof HighlightSelectionHTML) doDelete(request , (HighlightSelectionHTML)event.getValue());
		}
		if(event.getName().equals("toLoadUrl"))
		{
			if(event.getValue() instanceof String)
			{
				String url = (String) event.getValue();
				if (url.startsWith("http://")) 
					request.getPortletSession().setAttribute("current_url", url);
					//response.setRenderParameter("url", url.toLowerCase());
 
			}
		}
	}
 
	private void doDelete(EventRequest request , HighlightSelectionHTML _to_delete)
	{
		ArrayList<HighlightSelectionHTML> _hightlights = (ArrayList<HighlightSelectionHTML>)request.getPortletSession().getAttribute("highlights");
		if(_hightlights != null && _hightlights.size()>0)
		{
			System.out.println("[PortletWebBrowser.doDelete] _to_delete : " + _to_delete + " selection : " + _to_delete.getSelection() + " id : " + _to_delete.getId());
			for(HighlightSelectionHTML highlight : _hightlights)
			{
				System.out.println("[PortletWebBrowser.doDelete] highlight : " + highlight + " selection : " + highlight.getSelection()+ " id : " + highlight.getId());
				if(highlight.getId().compareTo(_to_delete.getId()) == 0) 
				{
					_hightlights.remove(highlight);
					request.getPortletSession().setAttribute("highlights" , _hightlights);
					return ;
				}
			}
		}
		System.out.println("[PortletWebBrowser.doDelete] don't find _to_delete : " + _to_delete);
	}
 
	private String generateHighlightId(ActionRequest request)
	{
		int nb_highlight = 0 ;
		if(request.getPortletSession().getAttribute("nb_highlight")!=null)
		{
			nb_highlight = (Integer)request.getPortletSession().getAttribute("nb_highlight");
			int _new_value = nb_highlight + 1;
			request.getPortletSession().setAttribute("nb_highlight", _new_value);
		}
		else request.getPortletSession().setAttribute("nb_highlight", 1);
		return request.getPortletSession().getId() + this.getPortletName() + nb_highlight;
	}
}

La méthode doSelection appelée par la méthode processAction envoi l'event en appelant la méthode sendEvent.
Je passe l'objet sans le serialisé. Le portail s'en charge.

Le code de la classe qui reçoit l'event :

Code :

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public class PortletCreateAnnotation extends GenericPortlet implements EventPortlet
{
	private static String defaultURL = "http://www.google.com";
 
	private static AgentStatus default_status = null ;
 
	private static RetrieveSimpleTextStatus RETRIEVER_SIMPLETEXT_STATUS = null ;
	private static CreateAgentStatus CREATOR_AGENT_STATUS = null ;
	private static RetrieveTag RETRIEVER_TAG = null ;
	private static CreateTag CREATOR_TAG = null ;
	private static CreateAnnotation CREATOR_ANNOTATION = null ;
	private static CreateUri CREATOR_URI = null ;
	private static CreateSimpleText CREATOR_SIMPLETEXT = null ;
	private static CreateSelectionHTML CREATOR_SELECTIONHTML = null ;
	private static RetrieveUri RETRIEVER_URI = null ;
	private static CreateDocumentHTML CREATOR_HTML = null ;
	private static CreateResource CREATOR_RESOURCE = null ;
	private static String APPLICATION_NAME = "PortletCreateAnnotation" ;
	private static String URL_SERVLET_ANNOTATIONS = null ;
 
    private static final String NORMAL_VIEW = "/WEB-INF/jsp/PortletCreateAnnotation/annotate.jsp";
    private static final String MAXIMIZED_VIEW = "/WEB-INF/jsp/PortletCreateAnnotation/maximized.jsp";
    private static final String HELP_VIEW = "/WEB-INF/jsp/PortletCreateAnnotation/help.jsp";
    private static final String EDIT_VIEW = "/WEB-INF/jsp/PortletCreateAnnotation/edit.jsp";
 
    private PortletRequestDispatcher normalView;
    private PortletRequestDispatcher maximizedView;
    private PortletRequestDispatcher helpView;
    private PortletRequestDispatcher editView;
 
    public void doView( RenderRequest request, RenderResponse response )
        throws PortletException, IOException {
    	setRenderAttributes(request);
        if( WindowState.MINIMIZED.equals( request.getWindowState() ) ) {
            return;
        }
 
        if ( WindowState.NORMAL.equals( request.getWindowState() ) ) {
            normalView.include( request, response );
        } else {
            maximizedView.include( request, response );
        }
    }
 
    protected void doEdit( RenderRequest request, RenderResponse response )
	throws PortletException, IOException 
	{
		setRenderAttributes(request);
		editView.include( request, response );
	}
 
    protected void doHelp( RenderRequest request, RenderResponse response )
        throws PortletException, IOException {
    	setRenderAttributes(request);
        helpView.include( request, response );
    }
 
    public void init( PortletConfig config ) throws PortletException {
        super.init( config );
        normalView = config.getPortletContext().getRequestDispatcher( NORMAL_VIEW );
        maximizedView = config.getPortletContext().getRequestDispatcher( MAXIMIZED_VIEW );
        helpView = config.getPortletContext().getRequestDispatcher( HELP_VIEW );
        editView = config.getPortletContext().getRequestDispatcher( EDIT_VIEW );
      //  new CreateAnnotationStatus().createAnnotationStatus("default", "un simple ajout de commentaires à un ensemble de sélections");
      //  new CreateSimpleTextStatus().createSimpleTextStatus("commentaire", "un simple champ texte pour laisser un commentaire libre");
        CreateAnnotationStatus _annotation_status_creator = new CreateAnnotationStatus() ;
        _annotation_status_creator.createSimpleCommentStatus();
        _annotation_status_creator.createSimpleTagStatus();
        RETRIEVER_SIMPLETEXT_STATUS = new RetrieveSimpleTextStatus();
        CREATOR_ANNOTATION = new CreateAnnotation();
        CREATOR_URI = new CreateUri();
        RETRIEVER_URI = new RetrieveUri();
        CREATOR_SIMPLETEXT = new CreateSimpleText();
        CREATOR_SELECTIONHTML = new CreateSelectionHTML();
        CREATOR_HTML = new CreateDocumentHTML();
        CREATOR_RESOURCE = new CreateResource();
        CREATOR_TAG = new CreateTag(); 
        RETRIEVER_TAG = new RetrieveTag();
        CREATOR_AGENT_STATUS = new CreateAgentStatus();
        RetrieveAgentStatus _retrieve_as = new RetrieveAgentStatus();
        default_status = _retrieve_as.retrieveAgentStatusDefault();
      //  default_status = new RetrieveAgentStatus().retrieveAgentStatusDefault();
        if(default_status.getId() == null) 
        {
        	System.out.println("[PortletCreateAnnotation.init] creates the default status");
        	CREATOR_AGENT_STATUS.createAgentStatusDefault();
        	default_status = _retrieve_as.retrieveAgentStatusDefault();
        }
        //provisoire en attendant de gérer totalement les descripteurs de status d'annotation
        new CreateSimpleTextStatus().createSimpleTextStatus("commentaire", "simple commentaire");
    }
 
    public void destroy() {
        normalView = null;
        maximizedView = null;
        helpView = null;
        editView = null ;
        super.destroy();
    }
 
    private void setRenderAttributes(RenderRequest request) 
	{
    	if(request.getPortletSession().getAttribute("application_name",  PortletSession.APPLICATION_SCOPE)!=null)
		{
			System.out.println("[PortletInscription.setRenderAttributes] application defined at application_scope");
			request.removeAttribute("config_error_message");
			request.getPortletSession();
			String _new_app_name = (String)request.getPortletSession().getAttribute("application_name", PortletSession.APPLICATION_SCOPE) ;
			APPLICATION_NAME = _new_app_name ;
		}
    	if(URL_SERVLET_ANNOTATIONS != null)	request.setAttribute("url_servlet", URL_SERVLET_ANNOTATIONS);
    	else request.setAttribute("url_servlet" , "");
    	if(request.getParameter("message")!=null) request.setAttribute("message" , request.getParameter("message"));
 
		/*if(request.getParameter("url")!=null) request.setAttribute("url", request.getParameter("url"));
		else if(request.getPortletSession().getAttribute("default_url",  PortletSession.APPLICATION_SCOPE) != null) request.setAttribute("url", request.getPortletSession().getAttribute("default_url",  PortletSession.APPLICATION_SCOPE));
		else request.setAttribute("url" , defaultURL);*/
    	String _current_url = defaultURL ;
    	if(request.getPortletSession().getAttribute("current_url")!= null) _current_url = (String)request.getPortletSession().getAttribute("current_url");
    	request.setAttribute("url", _current_url);
    	request.getPortletSession().setAttribute("current_url" , _current_url);
		if(request.getPortletSession().getAttribute("user")!=null) request.setAttribute("user", request.getPortletSession().getAttribute("user"));
		ArrayList _selections ;
		if(request.getPortletSession().getAttribute("selections") != null) _selections = (ArrayList) request.getPortletSession().getAttribute("selections") ;
		else _selections = new ArrayList();
		request.setAttribute("selections", _selections);
		if(request.getPortletSession().getAttribute("annotation_status") != null) request.setAttribute("annotation_status", request.getPortletSession().getAttribute("annotation_status"));
	}
 
    private void sendEvent(String _event_type , Serializable _event_object , ActionResponse response)
	{
		System.out.println("[PortletCreateAnnotation.sendEvent] type : " + _event_type + " value : " + _event_object);
		response.setEvent(_event_type, _event_object);
	}
 
    public void processEvent(EventRequest request, EventResponse response)
	{
		Event event = request.getEvent();
		System.out.println("[PortletCreateAnnotation.processEvent] event : " + event.getName());
		String _event_name = event.getName() ;
		if(_event_name.equalsIgnoreCase("UserLog"))
		{
			if(event.getValue() instanceof UserAccount)
			{
				UserAccount _current_user = (UserAccount)event.getValue() ;
				if(_current_user.getId() != null) request.getPortletSession().setAttribute("user", _current_user);
			}
		}
		if(_event_name.equalsIgnoreCase("UserUnLog"))
		{
			request.getPortletSession().removeAttribute("user");
		}
		if(_event_name.equalsIgnoreCase("loadedurl"))
		{
			if(event.getValue() instanceof String)
			{
				String url = (String) event.getValue();
				if (url.startsWith("http://")) 
					//response.setRenderParameter("url", url.toLowerCase());
					request.getPortletSession().setAttribute("current_url",  url.toLowerCase());
			}
		}
		if(_event_name.equalsIgnoreCase("default_url"))
		{
			if(event.getValue() instanceof String)
			{
				String url = (String) event.getValue();
				if (url.startsWith("http://")) 
					this.defaultURL = url ;
			}
		}
		if(_event_name.equalsIgnoreCase("selection"))
		{
			if(event.getValue() instanceof HighlightSelectionHTML)
			{
				ArrayList _selections ;
				if(request.getPortletSession().getAttribute("selections") != null)
					_selections = (ArrayList) request.getPortletSession().getAttribute("selections") ;
				else _selections = new ArrayList();
				_selections.add((HighlightSelectionHTML)event.getValue());
				request.getPortletSession().setAttribute("selections", _selections);
			}
		}
		if(_event_name.equalsIgnoreCase("Page"))
		{
			if(event.getValue() instanceof WebPage)
			{
				ArrayList _selections ;
				if(request.getPortletSession().getAttribute("selections") != null)
					_selections = (ArrayList) request.getPortletSession().getAttribute("selections") ;
				else _selections = new ArrayList();
				_selections.add((WebPage)event.getValue());
				request.getPortletSession().setAttribute("selections", _selections);
			}
		}
		if(_event_name.equalsIgnoreCase("change_status"))
		{
			AnnotationStatus status = (AnnotationStatus)event.getValue();
			System.out.println("[PortletCreateAnnotation.processevent] Status : " + status.getLabel());
			request.getPortletSession().setAttribute("annotation_status", status);
		}
	}
 
    public void processAction(ActionRequest request, ActionResponse response)
	throws PortletException, PortletSecurityException, IOException {
	String op = request.getParameter("op");
	StringBuffer message = new StringBuffer(1024);
	if ((op != null) && (op.trim().length() > 0)) 
	{
		//Mise à jour de l'url dans la barre de navigation de la portlet en View
		if (op.equalsIgnoreCase("clear_selections")) 
		{
			//vider la liste de sélections
			doClearSelections(request, response);
			return;
		} 
		//il y a eu une action de sélection pour annotation
		else if(op.equalsIgnoreCase("delete_selection"))
		{
			doDeleteSelection(request , response);
			return;
		}
		//mise à jour des données par interface Edit
		else if (op.equalsIgnoreCase("create_annotation")) 
		{
			doCreateAnnotation(request);
			response.setPortletMode(PortletMode.VIEW);
			return;
		}
		//mise à jour des données par interface Edit
		else if (op.equalsIgnoreCase("update")) 
		{
			doUpdate(request , response);
			return;
		}
		else if (op.equalsIgnoreCase("cancel")) 
		{
			doCancel(response);
			return;
		} 
		else
		{
			System.out.println("[BrowserPortlet.processAction 2]" + op);
			message.append("Operation not found");
		}
	} 
	else 
	{
		System.out.println("[PortletCreateAnnotation.processAction 3]" + op);
		message.append("Operation is null");
	}
	System.out.println("[PortletCreateAnnotation.processAction 4]" + op);
	response.setRenderParameter("message", message.toString());
	response.setPortletMode(PortletMode.VIEW);
	}
 
    private void doDeleteSelection(ActionRequest request, ActionResponse response)
    {
    	if(request.getParameter("cpt_selection")!=null)
		{
			int _index_selection_to_delete = Integer.parseInt(request.getParameter("cpt_selection"));
			if(request.getPortletSession().getAttribute("selections")!=null)
			{
				ArrayList _selections = (ArrayList)request.getPortletSession().getAttribute("selections");
				Object _selection_to_delete = _selections.get(_index_selection_to_delete);
				if(_selection_to_delete instanceof HighlightSelectionHTML) this.sendEvent("todelete", (HighlightSelectionHTML)_selection_to_delete, response);
				//ArrayList _to_send = new ArrayList() ;
				//_to_send.add(_selection_to_delete) ;
				_selections.remove(_index_selection_to_delete);
				request.getPortletSession().setAttribute("selections", _selections);
			}
			else System.out.println("[PortletCreationAnnotation.doDeleteSelection] selections attribute doesn't exist");
		}
		else System.out.println("[PortletCreationAnnotation.doDeleteSelection] no selection to delete");
    }
 
    private void doCreateAnnotation(ActionRequest request)
	{
    	if(URL_SERVLET_ANNOTATIONS == null)
    	{
    		System.out.println("[PortletCreationAnnotation.doCreateAnnotation] URL_SERVLET_ANNOTATIONS is null");
    	}
    	else
    	{
			System.out.println("[PortletCreationAnnotation.doCreateAnnotation]");
			//String _url = (String)request.getPortletSession().getAttribute("url");
			//récupération des sélections
			ArrayList _selections = (ArrayList)request.getPortletSession().getAttribute("selections");
			if(_selections.size() != 0)
			{
				UserAccount _author = (UserAccount)request.getPortletSession().getAttribute("user");
				String annotation_title = request.getParameter("annotation_title") ;
				//créer l'uri d'accés et de représentation de l'annotation.
				//celle ci devrait être un appel à la servlet d'affichage d'annotation
				//Par défaut la servlet affiche toutes les annotations, sinon, en passant l'id de l'annotation en paramétre, elle n'affiche que cette annotation
				//créer un attribut paramétrable via l'interface admin
				String _effective_uri = URL_SERVLET_ANNOTATIONS;
				CREATOR_URI.createURI(_effective_uri);
				URI access = RETRIEVER_URI.retrieveURI(_effective_uri);
				//le status de l'annotation sera un paramètre dans le formulaire
				//il va donc falloir récupérer tous les status possibles, en fonction du status, le formulaire d'annotation sera différent
				//dans le cas du status par défaut, on fait un simple commentaire
				//AnnotationStatus status = new RetrieveAnnotationStatus().retrieveAnnotationStatus("commentaire");
				AnnotationStatus status = (AnnotationStatus)request.getPortletSession().getAttribute("annotation_status");
				//récupérer toutes les valeurs à ajouter dans le formulaire :
				Enumeration<String> _parameters_names = request.getParameterNames() ;
				String _parameter_name;
				Collection<Resource> added = new ArrayList<Resource>();
				while(_parameters_names.hasMoreElements())
				{
					_parameter_name = _parameters_names.nextElement();
					if(_parameter_name.contains("added"))
					{
						if(_parameter_name.contains("_simpletext_"))
						{
							String _status_name = _parameter_name.substring(_parameter_name.lastIndexOf("_") + 1);
							SimpleTextStatus status_st = RETRIEVER_SIMPLETEXT_STATUS.retrieveSimpleTextStatus(_status_name);
							if(status_st == null)
							{
								status_st = RETRIEVER_SIMPLETEXT_STATUS.retrieveSimpleTextStatus("commentaire");
							}
							SimpleText st = CREATOR_SIMPLETEXT.createAndGetSimpleText(APPLICATION_NAME, _status_name + " de l'annotation : " + annotation_title, access, request.getParameter(_parameter_name), status_st);
							added.add(st);
						}
						else if(_parameter_name.contains("_tag_"))
						{
							Tag _tag;
							String _tag_label = request.getParameter(_parameter_name);
							List _tags = RETRIEVER_TAG.retrieveTag(_tag_label);
							if(_tags.size() > 0)
							{
								_tag = (Tag)_tags.get(0);
							}
							else
							{
								URI representsResource = new URI();
								//TODO setter une URI par l'admin
								representsResource.setEffectiveURI("http://www.uriprovisoirepourtag/" + _tag_label);
								_tag = CREATOR_TAG.createAndGetTag(_tag_label, " ", APPLICATION_NAME, representsResource);
							}
							added.add(_tag);
						}
						else if(_parameter_name.contains("_domain_"))
						{
							Domain _tag;
							String _domain_label = request.getParameter(_parameter_name);
							List _tags = RETRIEVER_TAG.retrieveDomain(_domain_label);
							if(_tags.size() > 0)
							{
								_tag = (Domain)_tags.get(0);
							}
							else
							{
								URI representsResource = new URI();
								//TODO setter une URI par l'admin
								representsResource.setEffectiveURI("http://www.uriprovisoirepourtag/domain/" + _domain_label);
								_tag = CREATOR_TAG.createAndGetDomain(_domain_label, " ", APPLICATION_NAME, representsResource);
							}
							added.add(_tag);
						}
						else if(_parameter_name.contains("_judgment_"))
						{
							Judgment _tag;
							String _judgment_label = request.getParameter(_parameter_name);
							List _tags = RETRIEVER_TAG.retrieveJudgment(_judgment_label);
							if(_tags.size() > 0)
							{
								_tag = (Judgment)_tags.get(0);
							}
							else
							{
								URI representsResource = new URI();
								//TODO setter une URI par l'admin
								representsResource.setEffectiveURI("http://www.uriprovisoirepourtag/judgment/" + _judgment_label);
								_tag = CREATOR_TAG.createAndGetJudgment(_judgment_label, " ", APPLICATION_NAME, representsResource);
							}
							added.add(_tag);
						}
						else if(_parameter_name.contains("_mood_"))
						{
							Mood _tag;
							String _mood_label = request.getParameter(_parameter_name);
							List _tags = RETRIEVER_TAG.retrieveMood(_mood_label);
							if(_tags.size() > 0)
							{
								_tag = (Mood)_tags.get(0);
							}
							else
							{
								URI representsResource = new URI();
								//TODO setter une URI par l'admin
								representsResource.setEffectiveURI("http://www.uriprovisoirepourtag/mood/" + _mood_label);
								_tag = CREATOR_TAG.createAndGetMood(_mood_label, " ", APPLICATION_NAME, representsResource);
							}
							added.add(_tag);
						}
					}
				}
				/*SimpleTextStatus status_st = new RetrieveSimpleTextStatus().retrieveSimpleTextStatus("commentaire");
				SimpleText st = CREATOR_SIMPLETEXT.createAndGetSimpleText(APPLICATION_NAME, status_st.getLabel() + " de l'annotation : " + annotation_title, access, request.getParameter("annotation_commentaire"), status_st);
				Collection<Resource> added = new ArrayList<Resource>();
				added.add(st);
				*/
				//il faut récupérer la liste de sélections
				Collection<Resource> annotated = new ArrayList<Resource>();
				for(Object _selection : _selections)
				{
					if(_selection instanceof HighlightSelectionHTML)
					{
						Resource _selection_origin = ((HighlightSelectionHTML)_selection).getSelection().getSelectionOrigin() ;
						if(_selection_origin instanceof WebPage)
						{
							URI _wp_access = ((WebPage)_selection_origin).getAccess();
							CREATOR_URI.createURI(_wp_access.getEffectiveURI());
							_wp_access = RETRIEVER_URI.retrieveURI(_wp_access.getEffectiveURI());
							URI _wp_represents = ((WebPage)_selection_origin).getRepresentsResource();
							CREATOR_URI.createURI(_wp_represents.getEffectiveURI());
							_wp_represents = RETRIEVER_URI.retrieveURI(_wp_represents.getEffectiveURI());
							URI _wp_principal = ((WebPage)_selection_origin).getPrincipalURL();
							CREATOR_URI.createURI(_wp_principal.getEffectiveURI());
							_wp_principal = RETRIEVER_URI.retrieveURI(_wp_principal.getEffectiveURI());
							_selection_origin = CREATOR_HTML.createAndGetWebPage(_selection_origin.getLabel(), _selection_origin.getContextCreation(), ((WebPage) _selection_origin).getHTMLContent(), _wp_access, _wp_represents, _wp_principal);
						}
						else
						{
							URI _resource_represents = _selection_origin.getRepresentsResource();
							CREATOR_URI.createURI(_resource_represents.getEffectiveURI());
							_resource_represents = RETRIEVER_URI.retrieveURI(_resource_represents.getEffectiveURI());
							_selection_origin = CREATOR_RESOURCE.createAndGetResource(_selection_origin.getContextCreation(), _selection_origin.getContextCreation(), _resource_represents);
						}
						URI _represents_selectionHTML = access ; //la même URI que pour l'annotation
						SelectionHTML _selectionHTML = CREATOR_SELECTIONHTML.createAndGetSelectionHTML(
							((HighlightSelectionHTML)_selection).getSelection().getLabel(),
							((HighlightSelectionHTML)_selection).getSelection().getContextCreation(),
							((HighlightSelectionHTML)_selection).getSelection().getHTMLContent(),
							((HighlightSelectionHTML)_selection).getSelection().getXpointerBegin(),
							((HighlightSelectionHTML)_selection).getSelection().getXpointerEnd(), 
							_represents_selectionHTML , 
							_selection_origin);
						annotated.add(_selectionHTML);
					}
					else if(_selection instanceof WebPage)
					{
						URI _wp_access = ((WebPage)_selection).getAccess();
						CREATOR_URI.createURI(_wp_access.getEffectiveURI());
						_wp_access = RETRIEVER_URI.retrieveURI(_wp_access.getEffectiveURI());
						URI _wp_represents = ((WebPage)_selection).getRepresentsResource();
						CREATOR_URI.createURI(_wp_represents.getEffectiveURI());
						_wp_represents = RETRIEVER_URI.retrieveURI(_wp_represents.getEffectiveURI());
						URI _wp_principal = ((WebPage)_selection).getPrincipalURL();
						CREATOR_URI.createURI(_wp_principal.getEffectiveURI());
						_wp_principal = RETRIEVER_URI.retrieveURI(_wp_principal.getEffectiveURI());
						WebPage _wp = CREATOR_HTML.createAndGetWebPage(((WebPage)_selection).getLabel(), ((WebPage)_selection).getContextCreation(), ((WebPage)_selection).getHTMLContent(), _wp_access, _wp_represents, _wp_principal);
						annotated.add(_wp);
					}
					else if(_selection instanceof Resource)
					{
						URI _represents_resource = ((Resource) _selection).getRepresentsResource();
						CREATOR_URI.createURI(_represents_resource.getEffectiveURI());
						_represents_resource = RETRIEVER_URI.retrieveURI(_represents_resource.getEffectiveURI());
						Resource _resource = CREATOR_RESOURCE.createAndGetResource(((Resource) _selection).getContextCreation(), ((Resource) _selection).getLabel(), _represents_resource);
						annotated.add(_resource);
					}
				}
				if(_author != null)
				{
					System.out.println("[PortletCreateAnnotation.doCreateAnnotation] il y a un autheur");
					System.out.println("[PortletCreateAnnotation.doCreateAnnotation] le nom de l'application " + APPLICATION_NAME);
					System.out.println("[PortletCreateAnnotation.doCreateAnnotation] status par défaut : " + default_status.getLabel());
					//ajouter le status à la collection de status de l'utilisateur
					CREATOR_AGENT_STATUS.addAgentStatusToAgent(_author, default_status);
					//créer le tag est autheur
					TagAgent author_tag = CREATOR_TAG.createAndGetTagAgentIsAuthor(_author, APPLICATION_NAME, _author.getRepresents().getRepresentsResource(), default_status);
					if(author_tag.getId() == null)
					{
						author_tag = RETRIEVER_TAG.retrieveTagAgentIsAuthor(_author, default_status);
					}
					//ajouter le tag est autheur à l'annotation
					if(author_tag.getId() != null)
					{
						System.out.println("[PortletCreateAnnotation.doCreateAnnotation] add the TagAgent isAuthor to the annotation TagAgent id :" + author_tag.getId());
						added.add(author_tag);
					}
				}
				CREATOR_ANNOTATION.createAnnotation(annotation_title, APPLICATION_NAME, access, access, status, added, annotated);
			}
    	}
	}
 
    private void doCancel(ActionResponse response) throws PortletModeException
	{
		response.setPortletMode(PortletMode.VIEW);
	}
 
    private void doUpdate(ActionRequest request, ActionResponse response) throws ReadOnlyException, ValidatorException, IOException, PortletModeException
	{
		String url = request.getParameter("servlet-url");
		boolean save = true ;
		if(url != null) 
		{
			if (!StringOp.isValidURI(url)) 
			{
				save = false;
				response.setRenderParameter("message", "not a valid URL");
				System.out.println("[PortletCreateAnnotation.doUpdate] not a valid url : " + url);
			} 
			if (save) 
			{
				URL_SERVLET_ANNOTATIONS = url ;
				response.setPortletMode(PortletMode.VIEW);
				return;
			}
			response.setPortletMode(PortletMode.EDIT);
		}
	}
 
    private void doClearSelections(ActionRequest request, ActionResponse response)
    {
    	if(request.getPortletSession().getAttribute("selections")!=null)
    	{
			ArrayList _selections = (ArrayList) request.getPortletSession().getAttribute("selections") ;
			for(Object _selection : _selections)
			{
				if(_selection instanceof HighlightSelectionHTML) sendEvent("todelete", (HighlightSelectionHTML)_selection, response);
			}
    		request.getPortletSession().removeAttribute("selections");	
    	}
    }
}

Regarde la méthode processEvent.
Je caste juste le event.getValue().

Le descripteur portlet.xml :

Code :

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<?xml version="1.0" encoding="UTF-8"?>
<portlet-app xmlns="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd"
             version="2.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd
      http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd">
<portlet>
      <portlet-name>PortletCreateAnnotation</portlet-name>
 	<portlet-class>fr.natoine.PortletAnnotation.PortletCreateAnnotation</portlet-class>
      <supports>
         <mime-type>text/html</mime-type>
         <portlet-mode>VIEW</portlet-mode>
         <portlet-mode>HELP</portlet-mode>
         <portlet-mode>EDIT</portlet-mode>
      </supports>
      <portlet-info>
         <title>portlet de création des annotations</title>
      </portlet-info>
      <supported-processing-event>
		<qname>change_status</qname>
	  </supported-processing-event>
       <supported-processing-event>
		<qname>UserLog</qname>
	  </supported-processing-event>
       <supported-processing-event>
		<qname>selection</qname>
	  </supported-processing-event> 
	   <supported-processing-event>
		<qname>page</qname>
	  </supported-processing-event> 
	  <supported-processing-event>
		<qname>UserUnLog</qname>
	  </supported-processing-event>
	    <supported-processing-event>
		<qname>loadedurl</qname>
	  </supported-processing-event> 
	  <supported-processing-event>
		<qname>default_url</qname>
	  </supported-processing-event> 
	  <supported-publishing-event>
		<qname>tohighlight</qname>
	  </supported-publishing-event>
	   <supported-publishing-event>
		<qname>todelete</qname>
	  </supported-publishing-event>
   </portlet>
 
 <portlet>
      <portlet-name>PortletWebBrowser</portlet-name>
 	<portlet-class>fr.natoine.PortletBrowser.PortletWebBrowser</portlet-class>
      <supports>
         <mime-type>text/html</mime-type>
         <portlet-mode>VIEW</portlet-mode>
         <portlet-mode>EDIT</portlet-mode>
      </supports>
      <portlet-info>
         <title>WebBrowserPortlet</title>
      </portlet-info> 
      <supported-publishing-event>
		<qname>selection</qname>
	  </supported-publishing-event>
	  <supported-publishing-event>
		<qname>page</qname>
	  </supported-publishing-event>
	  <supported-publishing-event>
		<qname>loadedurl</qname>
	  </supported-publishing-event>
	  <supported-publishing-event>
		<qname>default_url</qname>
	  </supported-publishing-event>
	   <supported-processing-event>
		<qname>toLoadUrl</qname>
	  </supported-processing-event>
	  <supported-processing-event>
		<qname>tohighlight</qname>
	  </supported-processing-event>
	   <supported-processing-event>
		<qname>todelete</qname>
	  </supported-processing-event>
   </portlet>
  <event-definition>
		<qname>UserLog</qname>
		<value-type>fr.natoine.model_user.UserAccount</value-type>
	</event-definition>
   <event-definition>
		<qname>selection</qname>
		<value-type>fr.natoine.model_htmlDocs.HighlightSelectionHTML</value-type>
	</event-definition>
	<event-definition>
		<qname>page</qname>
		<value-type>fr.natoine.model_htmlDocs.WebPage</value-type>
	</event-definition>
	 <event-definition>
		<qname>UserUnLog</qname>
		<value-type>java.lang.String</value-type>
	</event-definition>
	<event-definition>
		<qname>tohighlight</qname>
		<value-type>fr.natoine.model_htmlDocs.HighlightSelectionHTML</value-type>
	</event-definition>
	<event-definition>
		<qname>todelete</qname>
		<value-type>fr.natoine.model_htmlDocs.HighlightSelectionHTML</value-type>
	</event-definition>
	<event-definition>
		<qname>loadedurl</qname>
		<value-type>java.lang.String</value-type>
	</event-definition>
	<event-definition>
		<qname>default_url</qname>
		<value-type>java.lang.String</value-type>
	</event-definition>
	<event-definition>
		<qname>change_status</qname>
		<value-type>fr.natoine.model_annotation.AnnotationStatus</value-type>
	</event-definition>
</portlet-app>

**keyga** · 07/09/2010, 16h48

Désolé pour le retard, mais j'attendais d'en avoir besoin pour étudier ton code

.
Merci pour l'exemple en tout cas, ca marche nickel

**olive.m** · 14/09/2010, 19h35

Merci pour l'article !

Savez-vous s'il est possible d'envoyer un evenement à une portlet qui n'est pas sur la meme page ? (Je travaille sur Gatein)

Ou bien, formulé d'une autre façon, de dire à une portlet d ecouter un evenement alors que celle ci n est pas active

Merci d'avance et @+

**natoine** · 14/09/2010, 19h46

Pour moi, c'est impossible.
Je passe par la session dans ces cas là.
Maintenant si un jour tu trouves que c'est faisable, je veux bien que tu me montres

Communication entre portlets : le système d'évènements [Tutoriel]

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