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AS 7.1.1 send/receive a JMS message in Servlet question
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created by <a href="https://community.jboss.org/people/mjustin">Michael Justin</a> in <i>Beginner's Corner</i> - <a href="https://community.jboss.org/message/728702#728702">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hello,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I am trying to build a simple JMS produce / consume example in a Servlet. The full source code is below.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The servlet uses a resource annotation to inject the JMS destination which is configured in standalone-full.xml, and I also can verify that the destination exists (in the admin interface) and user and password are valid. The produce / consume methods complete without any errors, but the web admin interface does not show any messages. I tried to use persistent messages but it did not help. I will also check out the examples in the source distribution, and come back if I found the reason.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>package servlet;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import java.io.IOException;</p><p>import java.io.Writer;</p><p>import java.util.logging.Logger;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import javax.annotation.Resource;</p><p>import javax.jms.Connection;</p><p>import javax.jms.ConnectionFactory;</p><p>import javax.jms.DeliveryMode;</p><p>import javax.jms.JMSException;</p><p>import javax.jms.Message;</p><p>import javax.jms.MessageConsumer;</p><p>import javax.jms.MessageProducer;</p><p>import javax.jms.Session;</p><p>import javax.jms.TextMessage;</p><p>import javax.servlet.ServletException;</p><p>import javax.servlet.annotation.WebServlet;</p><p>import javax.servlet.http.HttpServlet;</p><p>import javax.servlet.http.HttpServletRequest;</p><p>import javax.servlet.http.HttpServletResponse;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>@WebServlet(name = "My Servlet", urlPatterns = { "/ms" })</p><p>public class MyServlet extends HttpServlet {</p><p>    private static final long serialVersionUID = 1L;</p><p>    </p><p>    @Resource(mappedName = "java:/ConnectionFactory")</p><p>    ConnectionFactory factory;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    private static final Logger log = Logger.getLogger("");</p><p>    private static final String username = "guest";</p><p>    private static final String password = "secret";</p><p>    private static final String destination = "ExampleTopic";</p><p>       </p><p>    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {</p><p>        produce();</p><p>        consume();</p><p>    }</p><p>    </p><p>    private void produce() {</p><p>        try {</p><p>            Connection conn = factory.createConnection(username, password);</p><p>            Session session = conn.createSession(false,</p><p>                    Session.AUTO_ACKNOWLEDGE);</p><p>            MessageProducer prod = session.createProducer(session</p><p>                    .createTopic(destination));</p><p>            prod.setDeliveryMode(DeliveryMode.PERSISTENT);</p><p>            conn.start();</p><p>            Message msg = session.createTextMessage("hello");</p><p>            prod.send(msg);</p><p>            conn.close();</p><p>        } catch (JMSException e) {</p><p>            log.info(e.getMessage());</p><p>        }</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    private void consume() {</p><p>        try {</p><p>            Connection conn = factory.createConnection(username, password);</p><p>            Session session = conn.createSession(false,</p><p>                    Session.AUTO_ACKNOWLEDGE);</p><p>            MessageConsumer cons = session.createConsumer(session</p><p>                    .createTopic(destination));</p><p>            conn.start();</p><p>            Message msg = cons.receive(1000);</p><p>            if (msg == null) {</p><p>                log.info("received no message");</p><p>            } else {</p><p>                TextMessage t = (TextMessage) msg;</p><p>                log.info(t.getText());</p><p>            }</p><p>            conn.close();</p><p>        } catch (JMSException e) {</p><p>            e.printStackTrace();</p><p>        }</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>}</p></div>
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