Can anyone tell me why my JMS Sessoin's createConsumer () throws a NullPointerException documentation says it doesn' throw?
I've been struggling for weeks to get a simple Java Class that can establish a JMS connection and exchange messages with WildFly ... and failing miserably.
Its Eclipse Neon and Wildfly 10. (The working class I once had with WF-8 defaulted to Hornert. Now I guess WF-10 defaluts to ArtemisMQ.)
Please find below:
ECLIPSE CONSOLE OUTPUT WITH STACK TRACE
STANDALONE JAVE CLIENT CODE
JARS ACCUMULATED SO FAR IN THE BUILD PATH (I doubt all are needed, but have been picked up as a wandered through posts about this and earlier problems with WF-10)
Thanks for any help.
NOTE: The code has an insane about of printing lines to format the Console output in a way that leaves no no doubt where the error is thrown. And the many irrelevant methods pasted at the bottom are just helpers I normally just import from my utility classes. But I pasted them in, because the goal is to leave behind a straight forward WORKING example of a remote Java client messaging WF-10, so I had to paste the helpers in so this code will be free standing. I.e. something a future newbie can just cut and paste and have a working starting point.
But stipping out all the printing code from main () leaves these 7 "simple" lines.)
Context ctx = new InitialContext(ENV); // Set Wildfly Initial Context
ConnectionFactory factory = (ConnectionFactory)ctx.lookup("jms/RemoteConnectionFactory");
Connection jmsConnection = factory.createConnection(
ENV.getProperty(Context.SECURITY_PRINCIPAL),
ENV.getProperty(Context.SECURITY_CREDENTIALS));
jmsConnection.start();
Session jmsSession = jmsConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
Queue jmsSendToClientQueue = (Queue) ctx.lookup("jms/queue/sendToClientQueue");
MessageConsumer jmsMsgConsumer = jmsSession.createConsumer(jmsSendToClientQueue, JMS_SELECTOR);
Help!
ECLIPSE CONSOLE OUTPUT WITH STACK TRACE
TestArtemisJmsWF10.main () beg
TestArtemisJmsWF10.main () Requesting InitialContext with:
CONNECTION VARIABLES
key: java.naming.provider.url value: http-remoting://localhost:8080
key: java.naming.factory.initial value: org.jboss.naming.remote.client.InitialContextFactory
key: java.naming.security.principal value: jmsUser
key: java.naming.security.credentials value: jmsUser123!
TestArtemisJmsWF10.main () InitialContext ok: javax.naming.InitialContext@4bbfb90a
TestArtemisJmsWF10.main () Lookup ConnectionFactory
TestArtemisJmsWF10.main () JNDI lookUp name: "jms/RemoteConnectionFactory"
TestArtemisJmsWF10.main () ConnectionFactory: Ok:
[org.apache.activemq.artemis.jms.client.ActiveMQJMSConnectionFactory]
TestArtemisJmsWF10.main () JMS Connection: Ok:
[org.apache.activemq.artemis.jms.client.ActiveMQConnection@6f03482]
TestArtemisJmsWF10.main () Starting jmsConnection & initiating Session
TestArtemisJmsWF10.main () Session ok - ActiveMQSession->ClientSessionImpl [name=b7cc0e2b-877b-11e7-a483-3ca9f4beb648, username=jmsUser, closed=false, factory = org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl@35fc6dc4, metaData=(jms-session=,)]@9d5509a
TestArtemisJmsWF10.main () Lookup Queue
TestArtemisJmsWF10.main () JNDI lookUp name: "jms/queue/sendToClientQueue"
TestArtemisJmsWF10.main () Queue secured: org.apache.activemq.artemis.jms.client.ActiveMQQueue
TestArtemisJmsWF10.main () Calling createConsumer() with selector: selector='AAAAA'
TestArtemisJmsWF10.main () Caught: java.lang.NullPointerException
when Creating JMS Message Consumer
Msg : null
TestArtemisJmsWF10.main () end - error
java.lang.NullPointerException
at org.apache.activemq.artemis.jms.client.ActiveMQDestination$TYPE.isTemporary(ActiveMQDestination.java:397)
at org.apache.activemq.artemis.jms.client.ActiveMQDestination.isTemporary(ActiveMQDestination.java:308)
at org.apache.activemq.artemis.jms.client.ActiveMQSession.createConsumer(ActiveMQSession.java:367)
at org.apache.activemq.artemis.jms.client.ActiveMQSession.createConsumer(ActiveMQSession.java:350)
at org.america3.gotest.xtra.TestArtemisJmsWF10.main(TestArtemisJmsWF10.java:65)
STANDALONE JAVA CLIENT CODE
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.MessageConsumer;
import javax.jms.Queue;
import javax.jms.Session;
public class TestArtemisJmsWF10 {
static final Properties ENV = new Properties() {
private static final long serialVersionUID = 1L;
{
put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
put(Context.PROVIDER_URL, "http-remoting://localhost:8080");
put(Context.SECURITY_PRINCIPAL, "jmsUser");
put(Context.SECURITY_CREDENTIALS, "jmsUser123!");
}
};
static final String JMS_SELECTOR = "selector=\'AAAAA\'";
public static void main (String args[]) {
boolean p = true; String iAmM = null; String s = " "; String errAt = "";
if (p) iAmM = TestArtemisJmsWF10.getIAm(Thread.currentThread().getStackTrace());
if (p) P(iAmM + "beg\n");
if (p) P(s + iAmM + "Requesting InitialContext with:");
if (p) P(printInitialContextProperties(8, ENV));
try {
errAt = "Requesting InitialContext";
Context ctx = new InitialContext(ENV); // Set Wildfly Initial Context
if (p) P("\n" + s + iAmM + "InitialContext ok: " + ctx);
errAt = "LookingUp ConnectionFactory";
if (p) P("\n" + s + iAmM + "Lookup ConnectionFactory");
if (p) P(s + iAmM + "JNDI lookUp name: \"jms/RemoteConnectionFactory\"");
ConnectionFactory factory = (ConnectionFactory) ctx.lookup("jms/RemoteConnectionFactory");
if (p) P(s + iAmM + "ConnectionFactory: Ok: " );
if (p) P(s + makeMargin(iAmM.length()) + "[" + factory.getClass().getName() +"]");
errAt = "Requesting Connection";
Connection jmsConnection = factory.createConnection(
ENV.getProperty(Context.SECURITY_PRINCIPAL),
ENV.getProperty(Context.SECURITY_CREDENTIALS));
if (p) P("\n" + s + iAmM + "JMS Connection: Ok:");
if (p) P(s + makeMargin(iAmM.length()) + "[" + jmsConnection + "]");
if (p) P("\n" + s + iAmM + "Starting jmsConnection & initiating Session");
errAt = "Starting Connection";
jmsConnection.start();
errAt = "Creating Session";
Session jmsSession = jmsConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
if (p) P(s + iAmM + "Session ok - " + jmsSession);
errAt = "Looking Up Queue";
if (p) P("\n" + s + iAmM + "Lookup Queue");
if (p) P(s + iAmM + "JNDI lookUp name: \"jms/queue/sendToClientQueue\"");
Queue jmsSendToClientQueue = (Queue) ctx.lookup("jms/queue/sendToClientQueue");
if(p) P(s + iAmM + "Queue secured: " + jmsSendToClientQueue.getClass().getName());
errAt = "Creating JMS Message Consumer";
if(p) P("\n" + s + iAmM + "Calling createConsumer() with selector: " + JMS_SELECTOR);
MessageConsumer jmsMsgConsumer = jmsSession.createConsumer(jmsSendToClientQueue, JMS_SELECTOR);
if(p) P(s + iAmM + "Consumer secured: " + jmsMsgConsumer);
if (p) P(iAmM + "end");
} catch (Exception e) {
if(p) P("\n" + s + iAmM + "Caught: "+ e.getClass().getName()
+ "\n" + s + makeMargin(iAmM.length()) + "when " + errAt);
if(p) P(s + makeMargin(iAmM.length()) + "Msg : " + e.getMessage());
if(p) P(iAmM + "end - error");
if (p) e.printStackTrace();
}
}
static public String printInitialContextProperties (int leader, Properties env) {
int maxLength = 0;
String s = padRight("", leader, ' ');
for (Object keyO: env.keySet()) {
String key = (String) keyO;
maxLength = 1+Math.max(maxLength, key.length());
}
StringBuffer sb = new StringBuffer ();
sb.append(s + "CONNECTION VARIABLES");
for (Object keyO: env.keySet()) {
String key = padRight((String)keyO, maxLength, ' ');
sb.append("\n" + s + "key: " + key + "value: " + env.get(keyO));
}
return sb.toString();
}
static public void P (String s) {
System.out.println(s);
}
static private String getIAm (StackTraceElement[] elements) {
StringBuffer sb = new StringBuffer ();
sb.append(getClassMethodName(elements));
sb.append(" ()");
return padRight (sb.toString(), 45, ' ') ;
}
static public String getClassMethodName (StackTraceElement[] elements) {
/*
* This method finds the 1st org.america3 element from the top
* of the stack
*/
String className = null;
for (int i = 0; i < elements.length; i++) {
className = elements[i].getClassName ();
if (className.startsWith ("org.america3")) {
int end = className.lastIndexOf ('.');
return className.substring (end + 1) + "." + elements[i].getMethodName ();
} else {
continue;
}
}
return "no project method found in elements beginning with org.america3" ;
}
static public String padRight(String s, int width, char c){
if (s == null) return "Null String";
if(s.length() >= width){
return s;
} else {
StringBuffer sb = new StringBuffer();
sb.append (s);
for(int i = 0; i < (width - s.length()); i++){
sb.append(c);
}
return sb.toString();
}
}
static public String makeMargin (int padWidth) {
StringBuffer sb = new StringBuffer ();
for (int i = 0; i < padWidth; i ++) {
sb.append(' ');
}
return sb.toString();
}
}
JARS ACCUMULATED SO FAR IN THE BUILD PATH
xnio-api-3.4.6.Final.jar
xnio-nio-3.4.3.Final.jar
slf4j-log4j12-1.8.0-alpha2.jar
apache-logging-log4j.jar
artemis-commons-2.2.0.jar
artemis-core-client-2.2.0.jar
artemis-jms-client-2.2.0.jar
artemis-selector-2.2.0.jar
commons-beanutils-1.9.2.jar
commons-logging-1.1.1.jar
commons-collections-3.2.1.jar
netty-all-4.1.9.Final.jar
javax.json-1.0.2.jar
javax.jms-3.1.2.2.jar
javax.mail-1.5.0.jar
javax.jms-api-2.0.jar
jboss-client.jar
jboss-logging-3.1.4.GA.jar
jboss-ejb-client-1.0.19.final.jar
jboss-marshalling-1.3.15.GA.jar
jboss-remoting-4.0.7.Final.jar
jboss-remote-naming-2.0.1.Final.jar
jboss-remoting-3.2.7.ga.jar
jboss-marshalling-river-1.3.14.GA.jar
hornetq-jms-client.jar
ADDED 2017-08-23
WF CLI COMMAND USED TO CONFIGURE SERVER SIDE QUEUE
[standalone@localhost:9990 /] /subsystem=messaging-activemq/server=default/jms-queue=SendToClientQue
ue:add(entries=[java:jboss/exported/jms/queue/sendToClientQueue]}
{"outcome" => "success"}
[standalone@localhost:9990 /]
STANDALONE-FULL.XML JMS MESSAGING SUBSYSTEM
<subsystem xmlns="urn:jboss:domain:messaging-activemq:1.0">
<server name="default">
<security enabled="false"/>
<security-setting name="#">
<role name="guest" send="true" consume="true" create-non-durable-queue="true" delete-non-durable-queue="true"/>
</security-setting>
...
<jms-queue name="ExpiryQueue" entries="java:/jms/queue/ExpiryQueue"/>
<jms-queue name="DLQ" entries="java:/jms/queue/DLQ"/>
<jms-queue name="SendToServerQueue" entries="java:jboss/exported/jms/queue/sendToServerQueue"/>
<jms-queue name="SendToClientQueue" entries="java:jboss/exported/jms/queue/sendToClientQueue }"/>
<connection-factory name="InVmConnectionFactory" entries="java:/ConnectionFactory" connectors="in-vm"/>
<connection-factory name="RemoteConnectionFactory" entries="java:jboss/exported/jms/RemoteConnectionFactory" connectors="http-connector"/>
<pooled-connection-factory name="activemq-ra" entries="java:/JmsXA java:jboss/DefaultJMSConnectionFactory" connectors="in-vm" transaction="xa"/>
</server>
</subsystem>
