helloworld-mdb: Helloworld Using an MDB (Message-Driven Bean)

The helloworld-mdb quickstart uses JMS and EJB Message-Driven Bean (MDB) to create and deploy JMS topic and queue resources in WildFly.

What is it?

The helloworld-mdb quickstart demonstrates the use of JMS and EJB Message-Driven Bean in WildFly Application Server.

This project creates two JMS resources:

A queue named HELLOWORLDMDBQueue bound in JNDI as java:/queue/HELLOWORLDMDBQueue
A topic named HELLOWORLDMDBTopic bound in JNDI as java:/topic/HELLOWORLDMDBTopic

Browse the source

System Requirements

The application this project produces is designed to be run on WildFly Application Server 33 or later.

All you need to build this project is Java 11.0 (Java SDK 11) or later and Maven 3.6.0 or later. See Configure Maven to Build and Deploy the Quickstarts to make sure you are configured correctly for testing the quickstarts.

Use of the WILDFLY_HOME and QUICKSTART_HOME Variables

In the following instructions, replace WILDFLY_HOME with the actual path to your WildFly installation. The installation path is described in detail here: Use of WILDFLY_HOME and JBOSS_HOME Variables.

When you see the replaceable variable QUICKSTART_HOME, replace it with the path to the root directory of all of the quickstarts.

Building and running the quickstart application with a WildFly server distribution

Start the WildFly Standalone Server

Open a terminal and navigate to the root of the WildFly directory.
Start the WildFly server with the full profile by typing the following command.
```
$ WILDFLY_HOME/bin/standalone.sh -c standalone-full.xml
```
Note
For Windows, use the WILDFLY_HOME\bin\standalone.bat script.

Build and Deploy the Quickstart

Make sure WildFly server is started.
Open a terminal and navigate to the root directory of this quickstart.
Type the following command to build the quickstart.
```
$ mvn clean package
```
Type the following command to deploy the quickstart.
```
$ mvn wildfly:deploy
```

This deploys the helloworld-mdb/target/helloworld-mdb.war to the running instance of the server.

You should see a message in the server log indicating that the archive deployed successfully.

Look at the WildFly console or server log and you should see log messages corresponding to the deployment of the message-driven beans and the JMS destinations:

INFO  [org.jboss.as.server.deployment] (MSC service thread 1-1) WFLYSRV0027: Starting deployment of "helloworld-mdb.war" (runtime-name: "helloworld-mdb.war")
...
INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-4) WFLYMSGAMQ0006: Unbound messaging object to jndi name java:/queue/HELLOWORLDMDBQueue
INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-4) WFLYMSGAMQ0002: Bound messaging object to jndi name java:/queue/HELLOWORLDMDBQueue
INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-2) WFLYMSGAMQ0006: Unbound messaging object to jndi name java:/topic/HELLOWORLDMDBTopic
INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-3) WFLYMSGAMQ0002: Bound messaging object to jndi name java:/topic/HELLOWORLDMDBTopic
INFO  [org.jboss.as.ejb3] (MSC service thread 1-4) WFLYEJB0042: Started message driven bean 'HelloWorldQueueMDB' with 'activemq-ra.rar' resource adapter
INFO  [org.jboss.as.ejb3] (MSC service thread 1-1) WFLYEJB0042: Started message driven bean 'HelloWorldQTopicMDB' with 'activemq-ra.rar' resource adapter
...
INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 87) WFLYUT0021: Registered web context: '/helloworld-mdb' for server 'default-server'
INFO  [org.jboss.as.server] (management-handler-thread - 1) WFLYSRV0010: Deployed "helloworld-mdb.war" (runtime-name : "helloworld-mdb.war")

Access the Application

The application will be running at the following URL: http://localhost:8080/helloworld-mdb/ and will send some messages to the queue.

To send messages to the topic, use the following URL: http://localhost:8080/helloworld-mdb/HelloWorldMDBServletClient?topic

Investigate the Server Console Output

Look at the WildFly console or Server log and you should see log messages like the following:

INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-9 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 5
INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-6 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 1
INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-7 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 4
INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-5 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 2
INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-4 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 3

Run the Integration Tests

This quickstart includes integration tests, which are located under the src/test/ directory. The integration tests verify that the quickstart runs correctly when deployed on the server.

Follow these steps to run the integration tests.

Make sure WildFly server is started.
Make sure the quickstart is deployed.
Type the following command to run the verify goal with the integration-testing profile activated.
```
$ mvn verify -Pintegration-testing 
```

Undeploy the Quickstart

When you are finished testing the quickstart, follow these steps to undeploy the archive.

Make sure WildFly server is started.
Open a terminal and navigate to the root directory of this quickstart.
Type this command to undeploy the archive:
```
$ mvn wildfly:undeploy
```

Building and running the quickstart application with provisioned WildFly server

Instead of using a standard WildFly server distribution, you can alternatively provision a WildFly server to deploy and run the quickstart, by activating the Maven profile named provisioned-server when building the quickstart:

$ mvn clean package -Pprovisioned-server

The provisioned WildFly server, with the quickstart deployed, can then be found in the target/server directory, and its usage is similar to a standard server distribution, with the simplification that there is never the need to specify the server configuration to be started.

The server provisioning functionality is provided by the WildFly Maven Plugin, and you may find its configuration in the quickstart pom.xml:

        <profile>
            <id>provisioned-server</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.wildfly.plugins</groupId>
                        <artifactId>wildfly-maven-plugin</artifactId>
                        <configuration>
                            <discover-provisioning-info>
                                <version>${version.server}</version>
                            </discover-provisioning-info>
                            <!--
                                Rename the output war to ROOT.war before adding it to the server, so that the
                                application is deployed in the root web context.
                            -->
                            <name>ROOT.war</name>
                            <add-ons>...</add-ons>
                        </configuration>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>package</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                    ...
                </plugins>
            </build>
        </profile>

The plugin uses WildFly Glow to discover the feature packs and layers required to run the application, and provisions a server containing those layers.

If you get an error or the server is missing some functionality which cannot be auto-discovered, you can download the WildFly Glow CLI and run the following command to see more information about what add-ons are available:

wildfly-glow show-add-ons

Note	Since the plugin configuration above deploys quickstart on root web context of the provisioned server, the URL to access the application should not have the `/helloworld-mdb` path segment after `HOST:PORT`.

Run the Integration Tests with a provisioned server

The integration tests included with this quickstart, which verify that the quickstart runs correctly, may also be run with a provisioned server.

Follow these steps to run the integration tests.

Make sure the server is provisioned.

$ mvn clean package -Pprovisioned-server

Start the WildFly provisioned server, this time using the WildFly Maven Plugin, which is recommended for testing due to simpler automation. The path to the provisioned server should be specified using the jbossHome system property.
```
$ mvn wildfly:start -DjbossHome=target/server 
```
Type the following command to run the verify goal with the integration-testing profile activated, and specifying the quickstart’s URL using the server.host system property, which for a provisioned server by default is http://localhost:8080.
```
$ mvn verify -Pintegration-testing -Dserver.host=http://localhost:8080 
```
Shutdown the WildFly provisioned server, this time using the WildFly Maven Plugin too.
```
$ mvn wildfly:shutdown
```

Building and running the quickstart application with OpenShift

Build the WildFly Source-to-Image (S2I) Quickstart to OpenShift with Helm Charts

On OpenShift, the S2I build with Apache Maven uses an openshift Maven profile to provision a WildFly server, deploy and run the quickstart in OpenShift environment.

The server provisioning functionality is provided by the WildFly Maven Plugin, and you may find its configuration in the quickstart pom.xml:

        <profile>
            <id>openshift</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.wildfly.plugins</groupId>
                        <artifactId>wildfly-maven-plugin</artifactId>
                        <configuration>
                            <discover-provisioning-info>
                                <version>${version.server}</version>
                                <context>cloud</context>
                            </discover-provisioning-info>
                            <!--
                                The parent POM's 'openshift' profile renames the output archive to ROOT.war so that the
                                application is deployed in the root web context. Add ROOT.war to the server.
                            -->
                            <filename>ROOT.war</filename>
                            <add-ons>...</add-ons>
                        </configuration>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>package</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                    ...
                </plugins>
            </build>
        </profile>

You may note that unlike the provisioned-server profile it uses the cloud context which enables a configuration tuned for OpenShift environment.

The plugin uses WildFly Glow to discover the feature packs and layers required to run the application, and provisions a server containing those layers.

wildfly-glow show-add-ons

Getting Started with WildFly for OpenShift and Helm Charts

This section contains the basic instructions to build and deploy this quickstart to WildFly for OpenShift or WildFly for OpenShift Online using Helm Charts.

Prerequisites

You must be logged in OpenShift and have an oc client to connect to OpenShift
Helm must be installed to deploy the backend on OpenShift.

Once you have installed Helm, you need to add the repository that provides Helm Charts for WildFly.

$ helm repo add wildfly https://docs.wildfly.org/wildfly-charts/
"wildfly" has been added to your repositories
$ helm search repo wildfly
NAME                    CHART VERSION   APP VERSION     DESCRIPTION
wildfly/wildfly         ...             ...            Build and Deploy WildFly applications on OpenShift
wildfly/wildfly-common  ...             ...            A library chart for WildFly-based applications

Deploy the WildFly Source-to-Image (S2I) Quickstart to OpenShift with Helm Charts

Log in to your OpenShift instance using the oc login command. The backend will be built and deployed on OpenShift with a Helm Chart for WildFly.

Navigate to the root directory of this quickstart and run the following command:

$ helm install helloworld-mdb -f charts/helm.yaml wildfly/wildfly --wait --timeout=10m0s 
NAME: helloworld-mdb
...
STATUS: deployed
REVISION: 1

This command will return once the application has successfully deployed. In case of a timeout, you can check the status of the application with the following command in another terminal:

oc get deployment helloworld-mdb

The Helm Chart for this quickstart contains all the information to build an image from the source code using S2I on Java 17:

build:
  uri: https://github.com/wildfly/quickstart.git
  ref: main
  contextDir: helloworld-mdb
deploy:
  replicas: 2

This will create a new deployment on OpenShift and deploy the application.

If you want to see all the configuration elements to customize your deployment you can use the following command:

$ helm show readme wildfly/wildfly

Get the URL of the route to the deployment.

$ oc get route helloworld-mdb -o jsonpath="{.spec.host}"

Access the application in your web browser using the displayed URL.

Note	The Maven profile named `openshift` is used by the Helm chart to provision the server with the quickstart deployed on the root web context, and thus the application should be accessed with the URL without the `/helloworld-mdb` path segment after `HOST:PORT`.

Run the Integration Tests with OpenShift

The integration tests included with this quickstart, which verify that the quickstart runs correctly, may also be run with the quickstart running on OpenShift.

Note	The integration tests expect a deployed application, so make sure you have deployed the quickstart on OpenShift before you begin.

Run the integration tests using the following command to run the verify goal with the integration-testing profile activated and the proper URL:

$ mvn verify -Pintegration-testing -Dserver.host=https://$(oc get route helloworld-mdb --template='{{ .spec.host }}')

Note	The tests are using SSL to connect to the quickstart running on OpenShift. So you need the certificates to be trusted by the machine the tests are run from.

Undeploy the WildFly Source-to-Image (S2I) Quickstart from OpenShift with Helm Charts

$ helm uninstall helloworld-mdb

Building and running the quickstart application with Kubernetes

Build the WildFly Quickstart to Kubernetes with Helm Charts

For Kubernetes, the build with Apache Maven uses an openshift Maven profile to provision a WildFly server, suitable for running on Kubernetes.

The server provisioning functionality is provided by the WildFly Maven Plugin, and you may find its configuration in the quickstart pom.xml:

        <profile>
            <id>openshift</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.wildfly.plugins</groupId>
                        <artifactId>wildfly-maven-plugin</artifactId>
                        <configuration>
                            <discover-provisioning-info>
                                <version>${version.server}</version>
                                <context>cloud</context>
                            </discover-provisioning-info>
                            <!--
                                The parent POM's 'openshift' profile renames the output archive to ROOT.war so that the
                                application is deployed in the root web context. Add ROOT.war to the server.
                            -->
                            <filename>ROOT.war</filename>
                            <add-ons>...</add-ons>
                        </configuration>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>package</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                    ...
                </plugins>
            </build>
        </profile>

You may note that unlike the provisioned-server profile it uses the cloud context which enables a configuration tuned for Kubernetes environment.

The plugin uses WildFly Glow to discover the feature packs and layers required to run the application, and provisions a server containing those layers.

wildfly-glow show-add-ons

Getting Started with Kubernetes and Helm Charts

This section contains the basic instructions to build and deploy this quickstart to Kubernetes using Helm Charts.

Install Kubernetes

In this example we are using Minikube as our Kubernetes provider. See the Minikube Getting Started guide for how to install it. After installing it, we start it with 4GB of memory.

minikube start --memory='4gb'

The above command should work if you have Docker installed on your machine. If, you are using Podman instead of Docker, you will also need to pass in --driver=podman, as covered in the Minikube documentation.

Once Minikube has started, we need to enable its registry since that is where we will push the image needed to deploy the quickstart, and where we will tell the Helm charts to download it from.

minikube addons enable registry

In order to be able to push images to the registry we need to make it accessible from outside Kubernetes. How we do this depends on your operating system. All the below examples will expose it at localhost:5000

# On Mac:
docker run --rm -it --network=host alpine ash -c "apk add socat && socat TCP-LISTEN:5000,reuseaddr,fork TCP:$(minikube ip):5000"

# On Linux:
kubectl port-forward --namespace kube-system service/registry 5000:80 &

# On Windows:
kubectl port-forward --namespace kube-system service/registry 5000:80
docker run --rm -it --network=host alpine ash -c "apk add socat && socat TCP-LISTEN:5000,reuseaddr,fork TCP:host.docker.internal:5000"

Prerequisites

Helm must be installed to deploy the backend on Kubernetes.

Once you have installed Helm, you need to add the repository that provides Helm Charts for WildFly.

$ helm repo add wildfly https://docs.wildfly.org/wildfly-charts/
"wildfly" has been added to your repositories
$ helm search repo wildfly
NAME                    CHART VERSION   APP VERSION     DESCRIPTION
wildfly/wildfly         ...             ...            Build and Deploy WildFly applications on OpenShift
wildfly/wildfly-common  ...             ...            A library chart for WildFly-based applications

Deploy the WildFly Source-to-Image (S2I) Quickstart to Kubernetes with Helm Charts

The backend will be built and deployed on Kubernetes with a Helm Chart for WildFly.

Navigate to the root directory of this quickstart and run the following commands:

mvn -Popenshift package wildfly:image

This will use the openshift Maven profile we saw earlier to build the application, and create a Docker image containing the WildFly server with the application deployed. The name of the image will be helloworld-mdb.

Next we need to tag the image and make it available to Kubernetes. You can push it to a registry like quay.io. In this case we tag as localhost:5000/helloworld-mdb:latest and push it to the internal registry in our Kubernetes instance:

# Tag the image
docker tag helloworld-mdb localhost:5000/helloworld-mdb:latest
# Push the image to the registry
docker push localhost:5000/helloworld-mdb:latest

In the below call to helm install which deploys our application to Kubernetes, we are passing in some extra arguments to tweak the Helm build:

--set build.enabled=false - This turns off the s2i build for the Helm chart since Kubernetes, unlike OpenShift, does not have s2i. Instead, we are providing the image to use.
--set deploy.route.enabled=false - This disables route creation normally performed by the Helm chart. On Kubernetes we will use port-forwards instead to access our application, since routes are an OpenShift specific concept and thus not available on Kubernetes.
--set image.name="localhost:5000/helloworld-mdb" - This tells the Helm chart to use the image we built, tagged and pushed to Kubernetes' internal registry above.

$ helm install helloworld-mdb -f charts/helm.yaml wildfly/wildfly --wait --timeout=10m0s --set build.enabled=false --set deploy.route.enabled=false --set image.name="localhost:5000/helloworld-mdb"
NAME: helloworld-mdb
...
STATUS: deployed
REVISION: 1

This command will return once the application has successfully deployed. In case of a timeout, you can check the status of the application with the following command in another terminal:

kubectl get deployment helloworld-mdb

The Helm Chart for this quickstart contains all the information to build an image from the source code using S2I on Java 17:

build:
  uri: https://github.com/wildfly/quickstart.git
  ref: main
  contextDir: helloworld-mdb
deploy:
  replicas: 2

This will create a new deployment on Kubernetes and deploy the application.

If you want to see all the configuration elements to customize your deployment you can use the following command:

$ helm show readme wildfly/wildfly

To be able to connect to our application running in Kubernetes from outside, we need to set up a port-forward to the helloworld-mdb service created for us by the Helm chart.

This service will run on port 8080, and we set up the port forward to also run on port 8080:

kubectl port-forward service/helloworld-mdb 8080:8080

The server can now be accessed via http://localhost:8080 from outside Kubernetes. Note that the command to create the port-forward will not return, so it is easiest to run this in a separate terminal.

Note	The Maven profile named `openshift` is used by the Helm chart to provision the server with the quickstart deployed on the root web context, and thus the application should be accessed with the URL without the `/helloworld-mdb` path segment after `HOST:PORT`.

Run the Integration Tests with Kubernetes

The integration tests included with this quickstart, which verify that the quickstart runs correctly, may also be run with the quickstart running on Kubernetes.

Note	The integration tests expect a deployed application, so make sure you have deployed the quickstart on Kubernetes before you begin.

Run the integration tests using the following command to run the verify goal with the integration-testing profile activated and the proper URL:

$ mvn verify -Pintegration-testing -Dserver.host=http://localhost:8080

Undeploy the WildFly Source-to-Image (S2I) Quickstart from Kubernetes with Helm Charts

$ helm uninstall helloworld-mdb

To stop the port forward you created earlier use:

$ kubectl port-forward service/helloworld-mdb 8080:8080

Clustering

You can choose to deploy and run this quickstart in a managed domain or on a standalone server. The sections below describe how to configure and start each type of server.

Before you begin:

If it is running, stop the WildFly server.
If you plan to test using a standalone server, back up the standalone server configuration file:
```
WILDFLY_HOME/standalone/configuration/standalone-full-ha.xml
```

If you plan to test using a managed domain, back up the following files:

WILDFLY_HOME/domain/configuration/domain.xml
WILDFLY_HOME/domain/configuration/host.xml

After you have completed testing this quickstart, you can replace these files to restore the server to its original configuration.

Configure the Server and Deploy the Quickstart

Configure the Server and Deploy the Quickstart to a Managed Domain

You configure the server by running the install-domain.cli script provided in the root directory of this quickstart.

Start the WildFly Managed Domain

Open a terminal and navigate to the root of the WildFly directory.
Start the WildFly managed domain by typing the following command.
```
$ WILDFLY_HOME/bin/domain.sh
```
Note
For Windows, use the WILDFLY_HOME\bin\domain.bat script.

Configure the Domain Server and Deploy the Quickstart Using the JBoss CLI

Review the install-domain.cli file in the root of this quickstart directory. This script creates the server group and servers and configures messaging clustering for testing this quickstart. You will note it does the following:
- Stops the servers
- Creates a server-group to test ActiveMQ Clustering
- Adds 2 servers to the server-group
- Configures ActiveMQ clustering in the full-ha profile
- Deploys the helloworld-mdb.war archive
- Restarts the servers.
Open a terminal, navigate to the root directory of this quickstart, and run the following command to run the script:
```
$ WILDFLY_HOME/bin/jboss-cli.sh --connect --file=install-domain.cli
```
Note
For Windows, use the WILDFLY_HOME\bin\jboss-cli.bat script.

You should see "outcome" ⇒ "success" for all of the commands.
Restart the server in a managed domainas described above.

Configure the Server and Deploy the Quickstart to a Standalone Server

If you choose to run standalone servers instead of a managed domain, you will need two instances of the application server. Application server 2 must be started with a port offset parameter provided to the startup script as -Djboss.socket.binding.port-offset=100.

Since both application servers must be configured in the same way, you must configure the first server and then clone it.

Start the Standalone Server Using the Full HA Profile.

Open a terminal and navigate to the root of the WildFly directory.
Start the WildFly server with the standalone full HA profile, which supports messaging and high availability, by typing the following command.
```
$ WILDFLY_HOME/bin/standalone.sh -c standalone-full-ha.xml
```
Note
For Windows, use the WILDFLY_HOME\bin\standalone.bat script.

Configure the Standalone Server and Deploy the Quickstart Using the JBoss CLI

Review the install-standalone.cli file in the root of this quickstart directory. This script configures clustering for a standalone server. You will note it does the following:
- Enables console logging. By default, the full HA profile does not log to the console, so this script enables it.
- Enables clustering and sets a cluster password
- Enables clustering in the RemoteConnectionFactory
- Deploys the helloworld-mdb.war archive
- Reloads the server configuration
Open a terminal, navigate to the root directory of this quickstart, and run the following command to run the script:
```
$ WILDFLY_HOME_1/bin/jboss-cli.sh --connect --file=install-standalone.cli
```
Note
For Windows, use the WILDFLY_HOME_1\bin\jboss-cli.bat script.

You should see "outcome" ⇒ "success" for all of the commands.

Clone the WildFly Directory

After you have successfully configured the server, you must make a copy of this WildFly directory structure to use for the second server.

Stop the server.
Make a copy of this WildFly directory structure to use for the second server.

Remove the following directories from the cloned instance:

WILDFLY_HOME_2/standalone/data/activemq/bindings/
WILDFLY_HOME_2/standalone/data/activemq/journal/
WILDFLY_HOME_2/standalone/data/activemq/largemessages/

Start the WildFly Standalone Servers with the Full HA Profile

When you start the servers, you must pass the cluster password on the command line to avoid the warning AMQ222186: unable to authorise cluster control.

$ WILDFLY_HOME_1/bin/standalone.sh -c standalone-full-ha.xml
$ WILDFLY_HOME_2/bin/standalone.sh -c standalone-full-ha.xml -Djboss.socket.binding.port-offset=100

Note	For Windows, use the `WILDFLY_HOME_1\bin\standalone.bat` and `WILDFLY_HOME_2\bin\standalone.bat` scripts.

Access the Application

Access the Application Running in a Managed Domain

The application will be running at the following URL: http://localhost:9080/helloworld-mdb/HelloWorldMDBServletClient.

It will send some messages to the queue.

To send messages to the topic, use the following URL: http://localhost:9080/helloworld-mdb/HelloWorldMDBServletClient?topic

Access the Application Running in a Standalone Server

The application will be running at the following URL: http://localhost:8080/helloworld-mdb/HelloWorldMDBServletClient.

It will send some messages to the queue.

To send messages to the topic, use the following URL: http://localhost:8080/helloworld-mdb/HelloWorldMDBServletClient?topic

Investigate the Server Console Output

Look at the WildFly server console or log and you should see log messages like the following:

[Server:quickstart-messagingcluster-node1] INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-8 (ActiveMQ-client-global-threads-1067469862)) Received Message from queue: This is message 1
[Server:quickstart-messagingcluster-node1] INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-8 (ActiveMQ-client-global-threads-1067469862)) Received Message from queue: This is message 3
[Server:quickstart-messagingcluster-node1] INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-6 (ActiveMQ-client-global-threads-1067469862)) Received Message from queue: This is message 5
[Server:quickstart-messagingcluster-node2] INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-8 (ActiveMQ-client-global-threads-1771031398)) Received Message from queue: This is message 2
[Server:quickstart-messagingcluster-node2] INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-7 (ActiveMQ-client-global-threads-1771031398)) Received Message from queue: This is message 4

Note that the logging indicates messages have arrived from both node 1, quickstart-messagingcluster-node1, as well as node 2, quickstart-messagingcluster-node2.

Server Log: Expected Warnings and Errors

You will see the following warnings in the server logs. You can ignore these warnings as they are intended for production servers.

WARNING [org.jgroups.protocols.UDP] (Thread-0 (ActiveMQ-server-ActiveMQServerImpl::serverUUID=c79278db-56e6-11e5-af50-69dd76236ee8-1573164340)) JGRP000015: the send buffer of socket DatagramSocket was set to 1MB, but the OS only allocated 212.99KB. This might lead to performance problems. Please set your max send buffer in the OS correctly (e.g. net.core.wmem_max on Linux)
WARNING [org.jgroups.protocols.UDP] (Thread-0 (ActiveMQ-server-ActiveMQServerImpl::serverUUID=c79278db-56e6-11e5-af50-69dd76236ee8-1573164340)) JGRP000015: the receive buffer of socket DatagramSocket was set to 20MB, but the OS only allocated 212.99KB. This might lead to performance problems. Please set your max receive buffer in the OS correctly (e.g. net.core.rmem_max on Linux)
WARNING [org.jgroups.protocols.UDP] (Thread-0 (ActiveMQ-server-ActiveMQServerImpl::serverUUID=c79278db-56e6-11e5-af50-69dd76236ee8-1573164340)) JGRP000015: the send buffer of socket MulticastSocket was set to 1MB, but the OS only allocated 212.99KB. This might lead to performance problems. Please set your max send buffer in the OS correctly (e.g. net.core.wmem_max on Linux)
WARNING [org.jgroups.protocols.UDP] (Thread-0 (ActiveMQ-server-ActiveMQServerImpl::serverUUID=c79278db-56e6-11e5-af50-69dd76236ee8-1573164340)) JGRP000015: the receive buffer of socket MulticastSocket was set to 25MB, but the OS only allocated 212.99KB. This might lead to performance problems. Please set your max receive buffer in the OS correctly (e.g. net.core.rmem_max on Linux)

After the server has been running for a period of time, you might see the following warnings in the server log, which are followed by a stacktrace. You can ignore these warnings as this is is a known issue and is harmless. See JBEAP-794 for more information.

WARN  [org.infinispan.topology.ClusterTopologyManagerImpl] (transport-thread--p15-t6) ISPN000197: Error updating cluster member list: org.infinispan.util.concurrent.TimeoutException: Replication timeout for <application-name>

Undeploy the Archive

When you are finished testing, use the following instructions to undeploy the quickstart.

Undeploy the Quickstart from a Managed Domain

Make sure you have started the WildFly server in a managed domain as described above.
Open a terminal, navigate to the root directory of this quickstart, and run the following command to undeploy the helloworld-mdb quickstart:
```
$ WILDFLY_HOME/bin/jboss-cli.sh --connect --file=undeploy-domain.cli
```
Note
For Windows, use the WILDFLY_HOME\bin\jboss-cli.bat script.

Undeploy the Quickstart from a Standalone Server

Make sure you start the WildFly server as described above.
Open a terminal, navigate to the root directory of this quickstart, and run the following command to undeploy the helloworld-mdb quickstart:
```
$ WILDFLY_HOME/bin/jboss-cli.sh --connect --file=undeploy-standalone.cli
```
Note
For Windows, use the WILDFLY_HOME\bin\jboss-cli.bat script.

Remove the Server Configuration

Remove the Domain Server Configuration

You can remove the domain configuration by manually restoring the back-up copies the configuration files or by running the JBoss CLI Script.

Remove the Domain Server Configuration Manually

Important

This method ensures the server is restored to its prior configuration.

If it is running, stop the WildFly server.
Restore the WILDFLY_HOME/domain/configuration/domain.xml and WILDFLY_HOME/domain/configuration/host.xml files with the back-up copies of the files. Make sure you replace WILDFLY_HOME with the path to your server.

Remove the Domain Server Configuration by Running the JBoss CLI Script

Important

This script returns the server to the default configuration, which might not match the server configuration that existed prior to testing this quickstart. If you were not running with the default configuration before testing this quickstart, you should follow the intructions above to manually restore the domain configuration to its previous state.

Start the WildFly server by typing the following:
```
$ WILDFLY_HOME/bin/jboss-cli.sh --connect --file=install-domain.cli
```
Note
For Windows, use the WILDFLY_HOME\bin\jboss-cli.bat script.
Open a new terminal, navigate to the root directory of this quickstart, and run the following command, replacing WILDFLY_HOME with the path to your server.
```
$ WILDFLY_HOME/bin/jboss-cli.sh --connect --file=remove-domain.cli
```
Note
For Windows, use the WILDFLY_HOME\bin\jboss-cli.bat script.

This script removes the server configuration that was done by the install-domain.cli script. You should see the following result following the script commands.
```
The batch executed successfully
```

Important

If the :stop-server command does not complete before the next commands are issued, you might see an error similar to the following:

{"JBAS014653: Composite operation failed and was rolled back. Steps that failed:" => {"Operation step-1" => "JBAS010977: Server (quickstart-messagingcluster-node1) still running"}}

Simply wait a few seconds and run the command a second time.

Remove the Standalone Server Configuration

You can remove the domain configuration by manually restoring the back-up copies the configuration files or by running the JBoss CLI Script.

Remove the Standalone Server Configuration Manually

Important

This method ensures the server is restored to its prior configuration.

If they are running, stop both WildFly servers.
Restore the WILDFLY_HOME_1/standalone/configuration/standalone-full-ha.xml file with the back-up copies of the file. Make sure you replace WILDFLY_HOME_1 with the path to your server.

Remove the Standalone Configuration by Running the JBoss CLI Script

Important

Start the WildFly server by typing the following:
```
$ WILDFLY_HOME_1/bin/standalone.sh -c standalone-full-ha.xml
```
Note
For Windows, use the WILDFLY_HOME_1\bin\standalone.bat script.
Open a new terminal, navigate to the root directory of this quickstart, and run the following command, replacing WILDFLY_HOME_1 with the path to your server.
```
$ WILDFLY_HOME_1/bin/jboss-cli.sh --connect --file=remove-standalone.cli
```
Note
For Windows, use the WILDFLY_HOME_1\bin\jboss-cli.bat script.

This script removes the server configuration that was done by the install-standalone.cli script. You should see the following result following the script commands:
```
The batch executed successfully
```

Delete the Cloned Standalone WildFly Directory

If it is running, stop the second instance of the WildFly server.
Delete the cloned directory.