Apache CXF client loads fine in Eclipse but standalone jar throws NullpointerException in WSDLServiceFactory

Question

My goal is to create a Web Service client that runs in a standalone jar with all the dependencies using mvn assembly:single

I generated the client using CXF codegen

Answer 1

In complement to @Matt R's answer, I replaced the POM part with the maven-assembly-plugin with this code:

<plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <archive>
                    <manifest>
                        <addClasspath>true</addClasspath>
                        <mainClass>com.xxx.App</mainClass>
                    </manifest>
                </archive>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>3.0.0</version>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                    <configuration>
                        <transformers>
                            <!--  transformers for CXF (see http://stackoverflow.com/a/9069435/61298) -->
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.handlers</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/services/com.sun.tools.xjc.Plugin</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.schemas</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/cxf/cxf.extension</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
                                <resource>META-INF/extensions.xml</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
                                <resource>META-INF/cxf/extensions.xml</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/cxf/bus-extensions.txt</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
                                <resource>META-INF/cxf/bus-extensions.xml</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
                                <resource>META-INF/wsdl.plugin.xml</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
                                <resource>META-INF/tools.service.validator.xml</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
                                <resource>META-INF/cxf/java2wsbeans.xml</resource>
                            </transformer>
                        </transformers>
                        <filters>
                            <filter>
                                <artifact>*:*</artifact>
                                <excludes>
                                    <exclude>META-INF/*.SF</exclude>
                                    <exclude>META-INF/*.DSA</exclude>
                                    <exclude>META-INF/*.RSA</exclude>
                                </excludes>
                            </filter>
                        </filters>
                    </configuration>
                </execution>
            </executions>
        </plugin>

The exclude part is to prevent from having Java Security issues.

Answer 2

Most likely it's how you are creating your single jar. A normal usage of the assembly plugin would not allow that as various parts of CXFs META-INF/* stuff would need to be merged together. That would include all the /META-INF/spring* and much of the stuff in /META-INF/cxf/* I would suggest using the shade plugin for that. See the pom.xml for CXF's bundle jar for an example.

http://svn.apache.org/repos/asf/cxf/trunk/osgi/bundle/all/

Answer 3

Expanding on @DanielKulp's answer, which worked a treat for me with CXF 2.7.7 (just in case the link dies). Configure your shade plugin with the following additional transformers:

<configuration>
  <transformers>
    <!--  transformers for CXF (see http://stackoverflow.com/a/9069435/61298) -->
    <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
      <resource>META-INF/spring.handlers</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
      <resource>META-INF/services/com.sun.tools.xjc.Plugin</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
      <resource>META-INF/spring.schemas</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
      <resource>META-INF/cxf/cxf.extension</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
      <resource>META-INF/extensions.xml</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
      <resource>META-INF/cxf/extensions.xml</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
      <resource>META-INF/cxf/bus-extensions.txt</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
      <resource>META-INF/cxf/bus-extensions.xml</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
      <resource>META-INF/wsdl.plugin.xml</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
      <resource>META-INF/tools.service.validator.xml</resource>
    </transformer>
    <transformer implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer">
      <resource>META-INF/cxf/java2wsbeans.xml</resource>
    </transformer>
  </transformers>
</configuration>

Answer 4

You should try with the one jar plugin, it let's you create super jars that are clean and totaly self-contained

http://code.google.com/p/onejar-maven-plugin/