Introducing Spring Framework

Chapter 11 ■ Integrating Your Spring Application with External Systems
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:META-INF/spring/mydocuments-context.xml")
public class MyDocumentsTest {
private static final Logger log = LoggerFactory.getLogger(MyDocumentsTest.class);
//Based on the META-INF/data/jms.txt - only one record
private static final int MAX_ALL_DOCS = 5;
private static final int MAX_WEB_DOCS = 2;
@Autowired
private SearchEngine engine;
@Test
public void testSpringJMS() throws InterruptedException {
log.debug("Testing Spring JMS Listener/Insert...");
assertNotNull(engine);
//Waiting a least 5 seconds so the message is consumed.
Thread.sleep(5000);
//After the JMS message and insert, must be 5 Documents
assertEquals(MAX_ALL_DOCS, engine.listAll().size());
}
Type documentType = new Type("WEB",".url");
assertEquals(MAX_WEB_DOCS, engine.findByType(documentType).size());
}
If you run this test (using gradle :ch11:test), it will work as long as you have an XML message sitting on the
queue; in other words, if you run the test again, it will fail because there are no messages. Then you need to do the
same as before: copy and paste the XML (Listing 11-1) and send it to the queue.
Maybe you are wondering why this test will fail. Based on the data.sql file that is loaded as an embedded
database in memory, you have only four records; after the consumer consumes the XML document and saves it
into the database, you will have five documents and the assertion will fail (assertEquals(MAX_ALL_DOCS, engine.
listAll().size()) because it is comparing the documents number in the database with the MAX_ALL_DOCS variable
that is set to 5. If you decide to run this test over and over, it will become tedious to manually send a message into the
ActiveMQ web page, right?
The Spring Framework also provides a template, the org.springframework.jms.core.JmsTemplate class, to help
you to send messages to any JMS broker so you can avoid copying and pasting messages manually into the ActiveMQ
web page. So let’s create a producer that will send messages through the broker. Listing 11-7 shows the producer.
Listing 11-7. JMSProducer.java
package com.apress.isf.spring.jms;
import java.io.IOException;
import java.io.InputStream;
import java.util.Scanner;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
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