/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.isis.viewer.wicket.ui.actionresponse;
import java.net.URL;
import org.apache.wicket.Component;
import org.apache.wicket.Page;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.behavior.AbstractAjaxBehavior;
import org.apache.wicket.request.Url;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.request.handler.resource.ResourceStreamRequestHandler;
import org.apache.wicket.request.resource.ContentDisposition;
import org.apache.wicket.util.resource.IResourceStream;
import org.apache.wicket.util.time.Duration;
import org.apache.isis.core.runtime.system.session.IsisSessionFactory;
import org.apache.isis.viewer.wicket.model.models.VoidModel;
import org.apache.isis.viewer.wicket.ui.pages.voidreturn.VoidReturnPage;
public enum ActionResultResponseHandlingStrategy {
REDIRECT_TO_VOID {
@Override
public void handleResults(
ActionResultResponse resultResponse,
final IsisSessionFactory isisSessionFactory) {
final RequestCycle requestCycle = RequestCycle.get();
requestCycle.setResponsePage(new VoidReturnPage(new VoidModel()));
}
},
REDIRECT_TO_PAGE {
@Override
public void handleResults(
final ActionResultResponse resultResponse,
final IsisSessionFactory isisSessionFactory) {
// force any changes in state etc to happen now prior to the redirect;
// in the case of an object being returned, this should cause our page mementos
// (eg EntityModel) to hold the correct state. I hope.
isisSessionFactory.getCurrentSession().getPersistenceSession().getTransactionManager().flushTransaction();
// "redirect-after-post"
final RequestCycle requestCycle = RequestCycle.get();
requestCycle.setResponsePage(resultResponse.getToPage());
}
},
SCHEDULE_HANDLER {
@Override
public void handleResults(
final ActionResultResponse resultResponse,
final IsisSessionFactory isisSessionFactory) {
final RequestCycle requestCycle = RequestCycle.get();
AjaxRequestTarget target = requestCycle.find(AjaxRequestTarget.class);
if (target == null) {
// non-Ajax request => just stream the Lob to the browser
// or if this is a no-arg action, there also will be no parent for the component
requestCycle.scheduleRequestHandlerAfterCurrent(resultResponse.getHandler());
} else {
// otherwise,
// Ajax request => respond with a redirect to be able to stream the Lob to the client
ResourceStreamRequestHandler scheduledHandler = (ResourceStreamRequestHandler) resultResponse.getHandler();
StreamAfterAjaxResponseBehavior streamingBehavior = new StreamAfterAjaxResponseBehavior(scheduledHandler);
final Page page = target.getPage();
page.add(streamingBehavior);
CharSequence callbackUrl = streamingBehavior.getCallbackUrl();
target.appendJavaScript("setTimeout(\"window.location.href='" + callbackUrl + "'\", 10);");
}
}
},
OPEN_URL_IN_BROWSER {
@Override
public void handleResults(
final ActionResultResponse resultResponse,
final IsisSessionFactory isisSessionFactory) {
final AjaxRequestTarget target = resultResponse.getTarget();
final URL url = resultResponse.getUrl();
final RequestCycle requestCycle = RequestCycle.get();
final String fullUrl = expanded(requestCycle, url);
target.appendJavaScript("setTimeout(function(){Wicket.Event.publish(Isis.Topic.OPEN_IN_NEW_TAB, '" + fullUrl + "');}, 100);");
}
};
public abstract void handleResults(
ActionResultResponse resultResponse,
final IsisSessionFactory isisSessionFactory);
/**
* @see #expanded(String)
*/
public static String expanded(RequestCycle requestCycle, final URL url) {
String urlStr = expanded(url);
return requestCycle.getUrlRenderer().renderFullUrl(Url.parse(urlStr));
}
/**
* @see #expanded(String)
*/
public static String expanded(final URL url) {
return expanded(url.toString());
}
/**
* very simple templating support, the idea being that "antiCache=${currentTimeMillis}"
* will be replaced automatically.
*/
public static String expanded(String urlStr) {
if(urlStr.contains("antiCache=${currentTimeMillis}")) {
urlStr = urlStr.replace("antiCache=${currentTimeMillis}", "antiCache="+System.currentTimeMillis());
}
return urlStr;
}
/**
* A special Ajax behavior that is used to stream the contents of a Lob after
* an Ajax request.
*/
private static class StreamAfterAjaxResponseBehavior extends AbstractAjaxBehavior {
private final String fileName;
private final IResourceStream resourceStream;
private final Duration cacheDuration;
public StreamAfterAjaxResponseBehavior(ResourceStreamRequestHandler scheduledHandler) {
this.fileName = scheduledHandler.getFileName();
this.resourceStream = scheduledHandler.getResourceStream();
this.cacheDuration = scheduledHandler.getCacheDuration();
}
@Override
public void onRequest() {
ResourceStreamRequestHandler handler = new ResourceStreamRequestHandler(resourceStream, fileName);
handler.setCacheDuration(cacheDuration);
handler.setContentDisposition(ContentDisposition.ATTACHMENT);
Component page = getComponent();
page.getRequestCycle().scheduleRequestHandlerAfterCurrent(handler);
page.remove(this);
}
}
}