001// Copyright 2005 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry.portlet;
016
017import java.io.IOException;
018
019import javax.portlet.ActionRequest;
020import javax.portlet.ActionResponse;
021
022import org.apache.tapestry.IRequestCycle;
023import org.apache.tapestry.StaleLinkException;
024import org.apache.tapestry.error.StaleLinkExceptionPresenter;
025import org.apache.tapestry.services.ServiceConstants;
026
027/**
028 * Implementation of {@link org.apache.tapestry.error.StaleLinkExceptionPresenter} for Portlets.
029 * 
030 * @author Howard M. Lewis Ship
031 * @since 4.0
032 */
033public class PortletStaleLinkExceptionPresenter implements StaleLinkExceptionPresenter
034{
035    private PortletRequestGlobals _globals;
036
037    public void presentStaleLinkException(IRequestCycle cycle, StaleLinkException cause)
038            throws IOException
039    {
040        ActionRequest request = _globals.getActionRequest();
041
042        request.getPortletSession(true).setAttribute(
043                PortletConstants.PORTLET_EXCEPTION_MARKUP_ATTRIBUTE,
044                cause.getMessage());
045
046        ActionResponse response = _globals.getActionResponse();
047
048        response.setRenderParameter(ServiceConstants.SERVICE, PortletConstants.EXCEPTION_SERVICE);
049    }
050
051    public void setGlobals(PortletRequestGlobals globals)
052    {
053        _globals = globals;
054    }
055}