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Bael 1273 Spring RSS Feed View (#4707) 

* Added example for BAEL-1273 - rss feed with Spring.

* Fixed javadoc

* Removed useless SpringBootServletInitializer in RSS app's launcher

* Explicitely added Spring Boot starting class in pom.xml to prevent errors in package phase.
This commit is contained in:
Donato Rimenti 2018-08-01 19:58:08 +02:00 committed by Josh Cummings
parent d1caea7afb
commit 815f655f36
5 changed files with 228 additions and 0 deletions
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13
spring-mvc-java/pom.xml
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@ -141,6 +141,13 @@
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
</dependency>
<!-- ROME for RSS -->
<dependency>
<groupId>com.rometools</groupId>
<artifactId>rome</artifactId>
<version>${rome.version}</version>
</dependency>
</dependencies>
<build>
@ -283,7 +290,13 @@
<!-- excel -->
<poi.version>3.16-beta1</poi.version>
<!-- ROME for RSS -->
<rome.version>1.10.0</rome.version>
<javax.el.version>2.2.4</javax.el.version>
<!-- Initial application class for Spring Boot -->
<start-class>com.baeldung.app.Application</start-class>
</properties>
</project>

23
spring-mvc-java/src/main/java/com/baeldung/rss/RssFeedApplication.java Normal file
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@ -0,0 +1,23 @@
package com.baeldung.rss;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* Spring Boot launcher for an application which exposes an RSS Feed.
*
* @author Donato Rimenti
*
*/
@SpringBootApplication
public class RssFeedApplication {
/**
* Launches a Spring Boot application which exposes an RSS Feed.
*
* @param args null
*/
public static void main(final String[] args) {
SpringApplication.run(RssFeedApplication.class, args);
}
}

32
spring-mvc-java/src/main/java/com/baeldung/rss/RssFeedController.java Normal file
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@ -0,0 +1,32 @@
package com.baeldung.rss;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.View;
/**
* REST Controller which returns an RSS Feed created by {@link RssFeedView}.
*
* @author Donato Rimenti
*
*/
@RestController
public class RssFeedController {
/**
* View used by this controller.
*/
@Autowired
private RssFeedView view;
/**
* Returns an RSS Feed created by {@link #view}.
*
* @return an RSS Feed
*/
@GetMapping("/rss")
public View getFeed() {
return view;
}
}

98
spring-mvc-java/src/main/java/com/baeldung/rss/RssFeedView.java Normal file
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@ -0,0 +1,98 @@
package com.baeldung.rss;
import java.sql.Date;
import java.time.Instant;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.view.feed.AbstractRssFeedView;
import com.rometools.rome.feed.rss.Channel;
import com.rometools.rome.feed.rss.Item;
/**
* View for a RSS feed.
*
* @author Donato Rimenti
*/
@Component
public class RssFeedView extends AbstractRssFeedView {
/*
* (non-Javadoc)
*
* @see org.springframework.web.servlet.view.feed.AbstractFeedView#
* buildFeedMetadata(java.util.Map, com.rometools.rome.feed.WireFeed,
* javax.servlet.http.HttpServletRequest)
*/
@Override
protected void buildFeedMetadata(Map<String, Object> model, Channel feed, HttpServletRequest request) {
feed.setTitle("Baeldung RSS Feed");
feed.setDescription("Learn how to program in Java");
feed.setLink("http://www.baeldung.com");
}
/*
* (non-Javadoc)
*
* @see org.springframework.web.servlet.view.feed.AbstractRssFeedView#
* buildFeedItems(java.util.Map, javax.servlet.http.HttpServletRequest,
* javax.servlet.http.HttpServletResponse)
*/
@Override
protected List<Item> buildFeedItems(Map<String, Object> model, HttpServletRequest request,
HttpServletResponse response) {
// Builds the single entries.
Item entryOne = new Item();
entryOne.setTitle("JUnit 5 @Test Annotation");
entryOne.setAuthor("donatohan.rimenti@gmail.com");
entryOne.setLink("http://www.baeldung.com/junit-5-test-annotation");
entryOne.setPubDate(Date.from(Instant.parse("2017-12-19T00:00:00Z")));
Item entryTwo = new Item();
entryTwo.setTitle("Creating and Configuring Jetty 9 Server in Java");
entryTwo.setAuthor("donatohan.rimenti@gmail.com");
entryTwo.setLink("http://www.baeldung.com/jetty-java-programmatic");
entryTwo.setPubDate(Date.from(Instant.parse("2018-01-23T00:00:00Z")));
Item entryThree = new Item();
entryThree.setTitle("Flyweight Pattern in Java");
entryThree.setAuthor("donatohan.rimenti@gmail.com");
entryThree.setLink("http://www.baeldung.com/java-flyweight");
entryThree.setPubDate(Date.from(Instant.parse("2018-02-01T00:00:00Z")));
Item entryFour = new Item();
entryFour.setTitle("Multi-Swarm Optimization Algorithm in Java");
entryFour.setAuthor("donatohan.rimenti@gmail.com");
entryFour.setLink("http://www.baeldung.com/java-multi-swarm-algorithm");
entryFour.setPubDate(Date.from(Instant.parse("2018-03-09T00:00:00Z")));
Item entryFive = new Item();
entryFive.setTitle("A Simple Tagging Implementation with MongoDB");
entryFive.setAuthor("donatohan.rimenti@gmail.com");
entryFive.setLink("http://www.baeldung.com/mongodb-tagging");
entryFive.setPubDate(Date.from(Instant.parse("2018-03-27T00:00:00Z")));
Item entrySix = new Item();
entrySix.setTitle("Double-Checked Locking with Singleton");
entrySix.setAuthor("donatohan.rimenti@gmail.com");
entrySix.setLink("http://www.baeldung.com/java-singleton-double-checked-locking");
entrySix.setPubDate(Date.from(Instant.parse("2018-04-23T00:00:00Z")));
Item entrySeven = new Item();
entrySeven.setTitle("Introduction to Dagger 2");
entrySeven.setAuthor("donatohan.rimenti@gmail.com");
entrySeven.setLink("http://www.baeldung.com/dagger-2");
entrySeven.setPubDate(Date.from(Instant.parse("2018-06-30T00:00:00Z")));
// Creates the feed.
return Arrays.asList(entryOne, entryTwo, entryThree, entryFour, entryFive, entrySix, entrySeven);
}
}

62
spring-mvc-java/src/test/java/com/baeldung/rss/RssFeedUnitTest.java Normal file
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@ -0,0 +1,62 @@
package com.baeldung.rss;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;
/**
* Test for {@link RssFeedApplication}.
*
* @author Donato Rimenti
*
*/
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = RssFeedApplication.class)
public class RssFeedUnitTest {
/**
* Application context.
*/
@Autowired
private WebApplicationContext context;
/**
* Mock to perform tests on Spring Web Controller.
*/
private MockMvc mvc;
/**
* Sets the test up.
*/
@Before
public void setup() {
mvc = MockMvcBuilders.webAppContextSetup(context).build();
}
/**
* Calls the RSS feed endpoint and checks that the result matches an
* expected one.
*
* @throws Exception
*/
@Test
public void givenRssFeed_whenComparedWithExisting_thenEquals() throws Exception {
// The expected response.
String expectedResult = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><rss version=\"2.0\"> <channel> <title>Baeldung RSS Feed</title> <link>http://www.baeldung.com</link> <description>Learn how to program in Java</description> <item> <title>JUnit 5 @Test Annotation</title> <link>http://www.baeldung.com/junit-5-test-annotation</link> <pubDate>Tue, 19 Dec 2017 00:00:00 GMT</pubDate> <author>donatohan.rimenti@gmail.com</author> </item> <item> <title>Creating and Configuring Jetty 9 Server in Java</title> <link>http://www.baeldung.com/jetty-java-programmatic</link> <pubDate>Tue, 23 Jan 2018 00:00:00 GMT</pubDate> <author>donatohan.rimenti@gmail.com</author> </item> <item> <title>Flyweight Pattern in Java</title> <link>http://www.baeldung.com/java-flyweight</link> <pubDate>Thu, 01 Feb 2018 00:00:00 GMT</pubDate> <author>donatohan.rimenti@gmail.com</author> </item> <item> <title>Multi-Swarm Optimization Algorithm in Java</title> <link>http://www.baeldung.com/java-multi-swarm-algorithm</link> <pubDate>Fri, 09 Mar 2018 00:00:00 GMT</pubDate> <author>donatohan.rimenti@gmail.com</author> </item> <item> <title>A Simple Tagging Implementation with MongoDB</title> <link>http://www.baeldung.com/mongodb-tagging</link> <pubDate>Tue, 27 Mar 2018 00:00:00 GMT</pubDate> <author>donatohan.rimenti@gmail.com</author> </item> <item> <title>Double-Checked Locking with Singleton</title> <link>http://www.baeldung.com/java-singleton-double-checked-locking</link> <pubDate>Mon, 23 Apr 2018 00:00:00 GMT</pubDate> <author>donatohan.rimenti@gmail.com</author> </item> <item> <title>Introduction to Dagger 2</title> <link>http://www.baeldung.com/dagger-2</link> <pubDate>Sat, 30 Jun 2018 00:00:00 GMT</pubDate> <author>donatohan.rimenti@gmail.com</author> </item> </channel></rss>";
// Performs a post against the RSS feed endpoint and checks that the
// result is equals to the expected one.
mvc.perform(MockMvcRequestBuilders.get("/rss")).andExpect(status().isOk())
.andExpect(content().xml(expectedResult));
}
}