juneau-examples/juneau-examples-rest/src/main/java/org/apache/juneau/examples/rest/AtomFeedResource.java

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package org.apache.juneau.examples.rest;

import static org.apache.juneau.dto.atom.AtomBuilder.*;
import static org.apache.juneau.http.HttpMethodName.*;
import static org.apache.juneau.jena.RdfCommon.*;
import static org.apache.juneau.jena.RdfSerializer.*;

import java.net.*;

import org.apache.juneau.dto.atom.*;
import org.apache.juneau.encoders.*;
import org.apache.juneau.microservice.*;
import org.apache.juneau.rest.annotation.*;
import org.apache.juneau.rest.widget.*;

/**
 * Sample resource that shows how to generate ATOM feeds.
 */
@RestResource(
	path="/atom",
	title="Sample ATOM feed resource",
	description="Sample resource that shows how to render ATOM feeds",
	htmldoc=@HtmlDoc(
		widgets={
			ContentTypeMenuItem.class,
			StyleMenuItem.class
		},
		navlinks={
			"up: request:/..",
			"options: servlet:/?method=OPTIONS",
			"$W{ContentTypeMenuItem}",
			"$W{StyleMenuItem}",
			"source: $C{Source/gitHub}/org/apache/juneau/examples/rest/$R{servletClassSimple}.java"
		}
	),
	properties={
		@Property(name=SERIALIZER_quoteChar, value="'"),
		@Property(name=RDF_rdfxml_tab, value="5"),
		@Property(name=RDF_addRootProperty, value="true")
	},
	encoders=GzipEncoder.class
)
public class AtomFeedResource extends BasicRestServletJena {
	private static final long serialVersionUID = 1L;

	private Feed feed;     // The root resource object

	@Override /* Servlet */
	public void init() {

		try {
			feed =
				feed("tag:juneau.sample.com,2013:1", "Juneau ATOM specification", "2013-05-08T12:29:29Z")
				.subtitle(text("html").text("A <em>lot</em> of effort went into making this effortless"))
				.links(
					link("alternate", "text/html", "http://www.sample.com/").hreflang("en"),
					link("self", "application/atom+xml", "http://www.sample.com/feed.atom")
				)
				.generator(
					generator("Juneau").uri("http://juneau.apache.org/").version("1.0")
				)
				.entries(
					entry("tag:juneau.sample.com,2013:1.2345", "Juneau ATOM specification snapshot", "2013-05-08T12:29:29Z")
					.links(
						link("alternate", "text/html", "http://www.sample.com/2012/05/08/juneau.atom"),
						link("enclosure", "audio/mpeg", "http://www.sample.com/audio/juneau_podcast.mp3").length(1337)
					)
					.published("2013-05-08T12:29:29Z")
					.authors(
						person("James Bognar").uri(new URI("http://www.sample.com/")).email("jamesbognar@apache.org")
					)
					.contributors(
						person("Barry M. Caceres")
					)
					.content(
						content("xhtml")
						.lang("en")
						.base("http://www.apache.org/")
						.text("<div><p>[Update: Juneau supports ATOM.]</p></div>")
					)
				);
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * GET request handler
	 */
	@RestMethod(name=GET, path="/", summary="Get the sample ATOM feed")
	public Feed getFeed() throws Exception {
		return feed;
	}

	/**
	 * PUT request handler.
	 * Replaces the feed with the specified content, and then mirrors it as the response.
	 */
	@RestMethod(name=PUT, path="/", summary="Overwrite the sample ATOM feed")
	public Feed setFeed(@Body Feed feed) throws Exception {
		this.feed = feed;
		return feed;
	}
}