This document discusses integrating Apache CXF with Adobe CQ to consume SOAP web services from CQ applications. It describes how to generate proxy classes from a WSDL using CXF codegen plugins, create a factory class and service interface to call the web service, and address issues with classloading in an OSGi environment when calling third party libraries like JAXB from CXF. The solution involves temporarily setting the thread context classloader when creating the web service client.

2. Adobe CQ Integration With Apache CXF
(By Ankur Chauhan)

3. Introduction to Apache CXF
Generate Proxy-Classes from WSDL
Consume SOAP Webservices from CQ Applications
Demo
Goals

4. Why Apache CXF ?
An Open-Source Services Framework
Implements APIs like JAX-WS and JAX-RS
Speaks a variety of protocols such as SOAP, XML/HTTP,
RESTful HTTP vie HTTP, JMS etc.
Supports various WS-* web service specs
Flexible and highly configurable
Optimized for integration with Spring
To bo continued...

5. CXF provides prepacked OSGI bundle JARs.
cxf-bundle-minimal
Contains minimal set of CXF JARs in one single bundle
& Does not contain 3rdparty Dependencies/XML APIs
Cxf-dosgi-ri-singlebundle-distribution
Contains minimal set of CXF JARs in one single bundle, Contains all
3rdparty Dependencies and XML APIs, Contains a lot of additional JARs like
Spring, Jetty, PAX, cxf-dosgi, slf4j, Commons Logging, log4j, jdom etc.
For more info visit - http://cxf.apache.org/docs/why-cxf.html

6. WebService
http://www.webservicex.net/ConvertTemperature.asmx
WSDL Location
http://www.webservicex.net/ConvertTemperature.asmx?WSDL

7. <plugin>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-codegen-plugin</artifactId>
<version>2.6.2</version>
<executions>
<execution>
<id>generate-sources</id>
<phase>generate-sources</phase>
<configuration>
<sourceRoot>${basedir}/src/main/java</sourceRoot>
<wsdlRoot>${basedir}/src/main/wsdl</wsdlRoot>
<wsdlOptions>
<wsdlOption>
<wsdl>${basedir}/src/main/wsdl/CT.wsdl</wsdl>
</wsdlOption>
</wsdlOptions>
</configuration>
<goals>
<goal>wsdl2java</goal>
</goals>
</execution>
</executions>
</plugin>
Generate Proxy classes from WSDL

8. Factory Class
public static <T> T create(Class<T> ParentClass, String portUrl) {
return JaxWsClientFactory.create(ParentClass, portUrl, null, null);
}
public static <T> T create(Class<T> ParentClass, String portUrl, String userName, String password) {
JaxWsProxyFactoryBean jaxWsProxyFactoryBean = new JaxWsProxyFactoryBean();
try {
jaxWsProxyFactoryBean.setServiceClass(ParentClass);
jaxWsProxyFactoryBean.setAddress(portUrl);
jaxWsProxyFactoryBean.setUsername(userName);
jaxWsProxyFactoryBean.setPassword(password);
} catch (Exception e) {
e.printStackTrace();
}
return (T) jaxWsProxyFactoryBean.create();
}

9. Service Interface
public interface ConvertTemperatureService {
double convertCelsiusToFahrenheit(double temperatureInCelsius);
}

10. @Override
public double convertCelsiusToFahrenheit(double valueToConvert) {
double convertedTemperature = 0.0;
try {
convertTemperatureSoap = JaxWsClientFactory.create(ConvertTemperatureSoap.class,
"http://www.webservicex.net/ConvertTemperature.asmx");
convertedTemperature = convertTemperatureSoap.convertTemp(valueToConvert,
TemperatureUnit.DEGREE_CELSIUS, TemperatureUnit.DEGREE_FAHRENHEIT);
} catch (Exception e) {
e.printStackTrace();
}
return convertedTemperature;
}

11. Caused by: javax.xml.bind.JAXBException
at javax.xml.bind.ContextFinder.newInstance(Unknown Source)
at javax.xml.bind.ContextFinder.find(Unknown Source)
at javax.xml.bind.JAXBContext.newInstance(Unknown Source)
... 75 more
Caused by: java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
at
org.apache.sling.commons.classloader.impl.ClassLoaderFacade.loadClass(ClassLoaderFacade.java:127)
at java.lang.ClassLoader.loadClass(Unknown Source)
at javax.xml.bind.ContextFinder.safeLoadClass(Unknown Source)
... 82 more

12. Reason: Illegal class loading in OSGI context
Referenced library calls
currentThread.getContextClassLoader().loadClass. In this case it‘s not CXF,
but the JAXB implementation. We cannot fix the 3rdparty Implementation.
“By default, the Thread context class loader is not aware of OSGi and
thus doesn't see any of the classes imported in the bundle. That's why loading
the class fails”.
Solution
See CQ5 KB Article:
http://helpx.adobe.com/experience-manager/kb/OsgiClassLoading3Party.html

13. Solution
public static <T> T create(Class<T> ParentClass, String portUrl) {
ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(BusFactory.class.getClassLoader());
try {
return JaxWsClientFactory.create(ParentClass, portUrl, null, null);
} finally {
Thread.currentThread().setContextClassLoader(oldClassLoader);
}
}

14. DEMO

15. Questions???????