NettyWebJptAction.java

package org.caudexorigo.jpt.web.netty;

import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaders;

import java.net.URI;
import java.util.HashMap;
import java.util.Map;

import org.caudexorigo.http.netty4.HttpAction;
import org.caudexorigo.http.netty4.reporting.MessageBody;
import org.caudexorigo.jpt.JptInstance;
import org.caudexorigo.jpt.JptInstanceBuilder;
import org.caudexorigo.jpt.web.HttpJptContext;
import org.caudexorigo.jpt.web.HttpJptController;

public class NettyWebJptAction extends HttpAction
{
	private static final String CONTENT_TYPE = "text/html; charset=UTF-8";

	private final URI _templateURI;

	public NettyWebJptAction(URI templateURI)
	{
		super();
		_templateURI = templateURI;
	}

	@Override
	public void service(ChannelHandlerContext ctx, FullHttpRequest request, FullHttpResponse response)
	{
		try
		{
			NettyJptProcessor aweb_jpt_processor = new NettyJptProcessor(ctx, request, response);
			JptInstance jpt = JptInstanceBuilder.getJptInstance(_templateURI);

			HttpJptContext jpt_ctx = new HttpJptContext(aweb_jpt_processor, getTemplateURI());
			HttpJptController page_controller = (HttpJptController) Class.forName(jpt.getCtxObjectType()).newInstance();

			page_controller.setHttpContext(jpt_ctx);
			page_controller.init();

			int http_status = jpt_ctx.getStatus();

			boolean allowsContent = MessageBody.allow(http_status);

			if (allowsContent)
			{
				Map<String, Object> renderContext = new HashMap<String, Object>();
				renderContext.put("$this", page_controller);
				renderContext.put("$jpt", jpt_ctx);

				jpt.render(renderContext, aweb_jpt_processor.getWriter());
				aweb_jpt_processor.flush();

				if (!response.headers().contains(HttpHeaders.Names.CONTENT_TYPE))
				{
					response.headers().set(HttpHeaders.Names.CONTENT_TYPE, CONTENT_TYPE);
				}
			}
		}
		catch (Throwable t)
		{
			throw new RuntimeException(t);
		}
	}

	public URI getTemplateURI()
	{
		return _templateURI;
	}
}