/**
 * 
 */
package com.github.podd.restlet;

import java.util.Map;

import org.restlet.Request;
import org.restlet.Response;
import org.restlet.data.MediaType;
import org.restlet.data.Status;
import org.restlet.representation.Representation;
import org.restlet.service.StatusService;

import freemarker.template.Configuration;

/**
 * This status service is based on the standard Restlet guide for returning custom error pages.
 * 
 * TODO: set this to Application via application.setStatusService()
 * TODO: create the templates used (i.e. PropertyUtils.PROPERTY_TEMPLATE...)
 * 
 * @author Peter Ansell p_ansell@yahoo.com
 * copied from the OAS project (https://github.com/ansell/oas)
 */
public class PoddStatusService extends StatusService
{
    
    private Configuration freemarkerConfiguration;
    
    /**
     * 
     */
    public PoddStatusService(final Configuration freemarkerConfiguration)
    {
        super();
        this.freemarkerConfiguration = freemarkerConfiguration;
    }
    
    /**
     * @param enabled
     */
    public PoddStatusService(final Configuration freemarkerConfiguration, final boolean enabled)
    {
        super(enabled);
        this.freemarkerConfiguration = freemarkerConfiguration;
    }
    
    /*
     * (non-Javadoc)
     * 
     * @see org.restlet.service.StatusService#getRepresentation(org.restlet.data.Status,
     * org.restlet.Request, org.restlet.Response)
     */
    @Override
    public Representation getRepresentation(final Status status, final Request request, final Response response)
    {
        final Map<String, Object> dataModel = RestletUtils.getBaseDataModel(request);
        
        dataModel.put("contentTemplate",
                "error.html.ftl");
        dataModel.put("pageTitle", "An error occurred : HTTP " + status.getCode());
        dataModel.put("error_code", Integer.toString(status.getCode()));
        
        // TODO: Support non-HTML error representations
        return RestletUtils.getHtmlRepresentation(
                "poddBase.html.ftl",
                dataModel, MediaType.TEXT_HTML, this.freemarkerConfiguration);
    }
}

/**
 * 
 */
package com.github.podd.restlet;

import java.util.Map;

import org.restlet.Request;
import org.restlet.Response;
import org.restlet.data.MediaType;
import org.restlet.data.Status;
import org.restlet.representation.Representation;
import org.restlet.service.StatusService;

import freemarker.template.Configuration;

/**
 * This status service is based on the standard Restlet guide for returning custom error pages.
 * 
 * TODO: set this to Application via application.setStatusService()
 * TODO: create the templates used (i.e. PropertyUtils.PROPERTY_TEMPLATE...)
 * 
 * @author Peter Ansell p_ansell@yahoo.com
 * copied from the OAS project (https://github.com/ansell/oas)
 */
public class PoddStatusService extends StatusService
{
    
    private Configuration freemarkerConfiguration;
    
    /**
     * 
     */
    public PoddStatusService(final Configuration freemarkerConfiguration)
    {
        super();
        this.freemarkerConfiguration = freemarkerConfiguration;
    }
    
    /**
     * @param enabled
     */
    public PoddStatusService(final Configuration freemarkerConfiguration, final boolean enabled)
    {
        super(enabled);
        this.freemarkerConfiguration = freemarkerConfiguration;
    }
    
    /*
     * (non-Javadoc)
     * 
     * @see org.restlet.service.StatusService#getRepresentation(org.restlet.data.Status,
     * org.restlet.Request, org.restlet.Response)
     */
    @Override
    public Representation getRepresentation(final Status status, final Request request, final Response response)
    {
        final Map<String, Object> dataModel = RestletUtils.getBaseDataModel(request);
        
        dataModel.put("contentTemplate", "error.html.ftl");
        dataModel.put("pageTitle", "An error occurred : HTTP " + status.getCode());
        dataModel.put("error_code", Integer.toString(status.getCode()));
        
        final StringBuilder message = new StringBuilder();
        if(status.getDescription() != null)
        {
            message.append(status.getDescription());
            message.append(" (");
        }
        if(status.getThrowable() != null && status.getThrowable().getMessage() != null)
        {
            message.append(status.getThrowable().getMessage());
            message.append(")");
        }
        dataModel.put("message", message.toString());
        
        // TODO: Support non-HTML error representations
        return RestletUtils.getHtmlRepresentation("poddBase.html.ftl", dataModel, MediaType.TEXT_HTML,
                this.freemarkerConfiguration);
    }
}

add a message for displaying in error page