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8.3. A service assembly project

Overview
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Red Hat JBoss Fuse requires that all service units are bundled into a service assembly before they can be deployed to a container. The JBoss Fuse Maven plug-in collects all of the service units to be bundled and the metadata necessary for packaging. It will then build a service assembly containing the service units.

Seeding a project using a Maven artifact
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Red Hat JBoss Fuse provides a Maven artifact for seeding a service assembly project. You can seed a project with the smx-arch command. As shown in Example 8.8, the smx-arch command takes two arguments: the groupId value and the artifactId values, which correspond to the project's group ID and artifact ID.

Example 8.8. Maven archetype command for service assemblies

smx-arch sa [ "-DgroupId=my.group.id" ] [ "-DartifactId=my.artifact.id" ]

Important
The double quotes(") are required when using the -DgroupId argument and the -DartifactId argument.

Contents of a project
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A service assembly project typically only contains the POM file used by Maven.

Configuring the Maven plug-in
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T configure the Maven plug-in to package the results of the project build as a service assembly, change the value of the project's packaging element to jbi-service-assembly, as shown in Example 8.9.

Example 8.9. Configuring the Maven plug-in to build a service assembly

<project ...>
  <modelVersion>4.0.0</modelVersion>

  ...
  <groupId>com.widgets.demo.cxf-wsdl-first</groupId>
  <artifactId>cxf-wsdl-first-sa</artifactId>
  <name>CXF WSDL Fisrt Demo :: Service Assembly</name>
  <packaging>jbi-service-assembly</packaging>
  ...
</project>
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Specifying the target components
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The Maven plug-in must know what service units are being bundled into the service assembly. This is done by specifying the service units as dependencies, using the standard Maven dependencies element. Add a dependency child element for each service unit. Example 8.10 shows the configuration for a service assembly that bundles two service units.

Example 8.10. Specifying the target components for a service unit

...
<dependencies>
  <dependency>
    <groupId>com.widgets.demo.cxf-wsdl-first</groupId>
    <artifactId>cxfse-wsdl-first-su</artifactId>
    <version>1.0</version>
  </dependency>
  <dependency>
    <groupId>com.widgets.demo.cxf-wsdl-first</groupId>
    <artifactId>cxfbc-wsdl-first-su</artifactId>
    <version>1.0</version>
  </dependency>
</dependencies>
...
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Example
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Example 8.11 shows a POM file for a project that is building a service assembly.

Example 8.11. POM for a service assembly project

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
                             http://maven.apache.org/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <parent> 1
        <groupId>com.widgets.demo</groupId>
        <artifactId>cxf-wsdl-first</artifactId>
        <version>1.0</version>
    </parent>

  <groupId>com.widgets.demo.cxf-wsdl-first</groupId>
  <artifactId>cxf-wsdl-first-sa</artifactId>
  <name>CXF WSDL Fisrt Demo ::  Service Assemby</name>
  <packaging>jbi-service-assembly</packaging> 2

  <dependencies> 3
    <dependency>
      <groupId>com.widgets.demo.cxf-wsdl-first</groupId>
      <artifactId>cxfse-wsdl-first-su</artifactId>
      <version>1.0</version>
    </dependency>
    <dependency>
      <groupId>com.widgets.demo.cxf-wsdl-first</groupId>
      <artifactId>cxfbc-wsdl-first-su</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin> 4
        <groupId>org.apache.servicemix.tooling</groupId>
        <artifactId>jbi-maven-plugin</artifactId>
        <extensions>true</extensions>
      </plugin>
    </plugins>
  </build>
</project>
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The POM in Example 8.11, “POM for a service assembly project” does the following:
1
Specifies that it is a part of the top-level project shown in Example 8.2, “Top-level POM for a Red Hat JBoss Fuse JBI project”
2
Specifies that this project builds a service assembly
3
Specifies the service units being bundled by the service assembly
4
Specifies to use the JBoss Fuse Maven plug-in
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