// Copyright 2007, 2008, 2009 The Apache Software Foundation
//
// Licensed 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.tapestry5.internal.services;
import org.apache.tapestry5.ContentType;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.SymbolConstants;
import org.apache.tapestry5.internal.InternalConstants;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.ioc.annotations.Symbol;
import org.apache.tapestry5.json.JSONObject;
import org.apache.tapestry5.services.MarkupWriterFactory;
import org.apache.tapestry5.services.PartialMarkupRenderer;
import org.apache.tapestry5.services.Request;
import org.apache.tapestry5.services.Response;
import java.io.IOException;
import java.io.PrintWriter;
public class AjaxPartialResponseRendererImpl implements AjaxPartialResponseRenderer
{
private final MarkupWriterFactory factory;
private final Request request;
private final Response response;
private final PartialMarkupRenderer partialMarkupRenderer;
private final String outputEncoding;
public AjaxPartialResponseRendererImpl(MarkupWriterFactory factory,
Request request,
Response response,
PartialMarkupRenderer partialMarkupRenderer,
@Inject @Symbol(SymbolConstants.CHARSET)
String outputEncoding)
{
this.factory = factory;
this.request = request;
this.response = response;
this.partialMarkupRenderer = partialMarkupRenderer;
this.outputEncoding = outputEncoding;
}
public void renderPartialPageMarkup() throws IOException
{
// This is a complex area as we are trying to keep public and private services properly
// seperated, and trying to keep stateless and stateful (i.e., perthread scope) services
// seperated. So we inform the stateful queue service what it needs to do here ...
ContentType pageContentType =
(ContentType) request.getAttribute(InternalConstants.CONTENT_TYPE_ATTRIBUTE_NAME);
ContentType contentType = new ContentType(InternalConstants.JSON_MIME_TYPE, outputEncoding);
MarkupWriter writer = factory.newPartialMarkupWriter(pageContentType);
JSONObject reply = new JSONObject();
// ... and here, the pipeline eventually reaches the PRQ to let it render the root render command.
partialMarkupRenderer.renderMarkup(writer, reply);
PrintWriter pw = response.getPrintWriter(contentType.toString());
pw.print(reply);
pw.close();
}
}