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From Johan Edstrom <seij...@gmail.com>
Subject Re: java.lang.NoClassDefFoundError: org/apache/commons/httpclient/HttpMethod
Date Sat, 21 May 2011 16:08:14 GMT
Not sure what you have been reading really, 

But you are trying to use a jms "client/producer" against the activemq webapp,
not a transport, you are also missing commons-httpclient on the classpath.

/je

On May 20, 2011, at 9:09 PM, Michael wrote:

> I am trying to run a very simple ActiveMQ message producer client.  The
> source code is provided below.
> 
> 
> 
> I am launching the app from Eclipse using the Run menu.  I have configured a
> Run Configuration For the client app.  On the classpath tab of the Run
> Configuration for the app I have included activemq-all-5.5.0.jar,
> slf4j-simple-1.5.11 and httpclient-4.1.1.jar.
> 
> 
> 
> When I run the app I get the following stack trace provided below.  Can
> anyone tell me what might be wrong?
> 
> 
> 
> Thank you.
> 
> 
> 
> Exception in thread "main" java.lang.NoClassDefFoundError:
> org/apache/commons/httpclient/HttpMethod
> 
>      at
> org.apache.activemq.transport.http.HttpTransportFactory.createTransport(Http
> TransportFactory.java:75)
> 
>      at
> org.apache.activemq.transport.TransportFactory.doConnect(TransportFactory.ja
> va:141)
> 
>      at
> org.apache.activemq.transport.TransportFactory.doConnect(TransportFactory.ja
> va:51)
> 
>      at
> org.apache.activemq.transport.TransportFactory.connect(TransportFactory.java
> :80)
> 
>      at
> org.apache.activemq.ActiveMQConnectionFactory.createTransport(ActiveMQConnec
> tionFactory.java:243)
> 
>      at
> org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(Activ
> eMQConnectionFactory.java:258)
> 
>      at
> org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(Activ
> eMQConnectionFactory.java:230)
> 
>      at
> org.apache.activemq.ActiveMQConnectionFactory.createConnection(ActiveMQConne
> ctionFactory.java:178)
> 
>      at JMSActiveMQPublisherApp.Execute(JMSActiveMQPublisherApp.java:39)
> 
>      at JMSActiveMQPublisherApp.main(JMSActiveMQPublisherApp.java:28)
> 
> Caused by: java.lang.ClassNotFoundException:
> org.apache.commons.httpclient.HttpMethod
> 
>      at java.net.URLClassLoader$1.run(Unknown Source)
> 
>      at java.security.AccessController.doPrivileged(Native Method)
> 
>      at java.net.URLClassLoader.findClass(Unknown Source)
> 
>      at java.lang.ClassLoader.loadClass(Unknown Source)
> 
>      at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
> 
>      at java.lang.ClassLoader.loadClass(Unknown Source)
> 
>      ... 10 more
> 
> 
> 
> import java.util.Vector;
> 
> 
> 
> import javax.jms.Connection;
> 
> import javax.jms.Session;
> 
> import javax.jms.Destination;
> 
> import javax.jms.DeliveryMode;
> 
> import javax.jms.MessageProducer;
> 
> import javax.jms.TextMessage;
> 
> 
> 
> import org.apache.activemq.ActiveMQConnection;
> 
> import org.apache.activemq.ActiveMQConnectionFactory;
> 
> 
> 
> public class JMSActiveMQPublisherApp
> 
> {
> 
>    private String user         = ActiveMQConnection.DEFAULT_USER;
> 
>    private String password     = ActiveMQConnection.DEFAULT_PASSWORD;
> 
>    private String url          = "http://localhost:8161/";
> 
>    private String subject      = "Subject.One";
> 
>    private int    messageCount = 10;
> 
>    private long   sleepTime    = 10000;
> 
> 
> 
> 
> 
>    private Destination destination;
> 
> 
> 
>    public static void main(String[] args)
> 
>      {
> 
>      JMSActiveMQPublisherApp app = new JMSActiveMQPublisherApp( );
> 
>      app.Execute();
> 
>      }
> 
> 
> 
>    public void Execute( )
> 
>    {
> 
>        Connection connection = null;
> 
>        try
> 
>        {
> 
>            // Create the connection.
> 
>            ActiveMQConnectionFactory connectionFactory =
> 
>                  new ActiveMQConnectionFactory(user, password, url);
> 
>            connection = connectionFactory.createConnection();
> 
>            connection.start();
> 
> 
> 
>            // Create the session
> 
>            // The argument false indicates that this session is not
> transacted
> 
>            Session session = 
> 
>                  connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
> 
> 
> 
>            // Note that this method is not for creating the physical topic.
> 
>            // The physical creation of topics is an administrative task and
> 
>            // is not to be initiated by the JMS API.
> 
>            //
> 
>            // So a publisher can not create new topics.  The topics must
> 
>            // be created manually.  The publisher can only send messages to
> 
>            // already existing topics.
> 
>            //
> 
>            // This appears to be a severely limited implementation of the
> 
>            // publish/subscribe model!!!
> 
>            destination = session.createTopic(subject);
> 
> 
> 
>            // Create the producer.
> 
>            MessageProducer producer = session.createProducer(destination);
> 
>            producer.setDeliveryMode(DeliveryMode.PERSISTENT);
> 
> 
> 
>            // Start sending messages
> 
>            SendLoop(session, producer);
> 
> 
> 
> 
> 
>        }
> 
>        catch (Exception e)
> 
>        {
> 
>            System.out.println("Exception: " + e.getMessage());
> 
>            e.printStackTrace();
> 
>        }
> 
>        finally 
> 
>        {
> 
>            try
> 
>            {
> 
>                connection.close();
> 
>            }
> 
>            catch (Throwable ignore)
> 
>            {
> 
>            }
> 
>        }
> 
>    }
> 
> 
> 
>    private void SendLoop(Session session, MessageProducer producer) throws
> Exception
> 
>    {
> 
> 
> 
>        for (int i = 0; i < messageCount || messageCount == 0; i++) {
> 
> 
> 
>            TextMessage message = session.createTextMessage("This is message
> " + messageCount + " for topic Subject.One!" );
> 
> 
> 
>            producer.send(message);
> 
> 
> 
>            System.out.println("Message " + messageCount + " sent to topic
> Subject.One");
> 
> 
> 
>            Thread.sleep(sleepTime);
> 
>        }
> 
>    }
> 
> }
> 
> 
> 


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