If you want to run a Snoop enabled microservice in WildFly Swarm, you will need to add some more dependencies to get it to work. This is because Snoop relies on being run in a Java EE 7 compliant application server. And you will need to tell Swarm what parts you need to be able to run it.

In addition to the Swarm modules your microservice depend on, you will also need to add the following dependencies that Snoop requires:

<dependencies>
  <dependency>
    <groupId>eu.agilejava</groupId>
    <artifactId>snoop</artifactId>
    <version>1.3.0-SNAPSHOT</version>
  </dependency>
  <dependency>
    <groupId>org.glassfish</groupId>
    <artifactId>javax.json</artifactId>
    <version>1.0.4</version>
  </dependency>
  <dependency>
    <groupId>org.wildfly.swarm</groupId>
    <artifactId>wildfly-swarm-jaxrs</artifactId>
    <version>1.0.0.Alpha4</version>
    <scope>provided</scope>
  </dependency>      
  <dependency>
    <groupId>org.wildfly.swarm</groupId>
    <artifactId>wildfly-swarm-ejb</artifactId>
    <version>1.0.0.Alpha4</version>
    <scope>provided</scope>
  </dependency>      
  <dependency>
    <groupId>org.wildfly.swarm</groupId>
    <artifactId>wildfly-swarm-weld</artifactId>
    <version>1.0.0.Alpha4</version>
    <scope>provided</scope>
  </dependency>      
</dependencies>

The build section may be just as any swarm application:

<build>
  <plugins>
    <plugin>
      <groupId>org.wildfly.swarm</groupId>
      <artifactId>wildfly-swarm-plugin</artifactId>
      <version>1.0.0.Alpha4</version>
      <executions>
        <execution>
          <goals>
            <goal>package</goal>
          </goals>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>

Doing this will enable you to run your application as a JAR:

java -jar myservice-swarm.jar

A more complete example can be found here:

https://github.com/ivargrimstad/snoop/tree/master/snoop-examples/snoop-swarm