Adding a custom Type Converter to Spring XD

Question

Unfortunately, it seems like Spring XD doesn't ship with XML type converter ( application/xml ).

I implemented 2 AbstractFromMessageConverter s for converting POJO to XML and vice versa.

According to documentation it says to look at streams.xml where I think they were really referring to this XML. I provided a list named customMessageConverters and my own Configuration which exposes these converters in an attempt to add them to Spring XD application context.

I wrote:

@Configuration
    @Slf4j
    public class XmlConverterConfiguration {

        @Bean
        public CompositeMessageConverter compositeMessageConverter(final  MessageConverter[] converters) {
                log.info("Registering XML converters");
                return new CompositeMessageConverter(Arrays.asList(converters));
            }
        }

And I added @Component annotation to my Converters.

And also this XML:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:util="http://www.springframework.org/schema/util"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">

    <!-- Users can override this to add converters.-->
    <util:list id="customMessageConverters">
        <bean class="my.custom.mime.converter.PojoToXmlMessageConverter"/>
        <bean class="my.custom.mime.converter.XmlToPojoMessageConverter"/>
    </util:list>

</beans>

and I tried adding this XML to src/main/resources and src/main/resources/config and then I put the compiled .jar to $XD_HOME/lib but it doesn't get registered properly.

I don't see the log from my Configuration and when I try to set outputType to application/xml I get an exception that it isn't supported:

org.springframework.xd.dirt.plugins.ModuleConfigurationException: Content type is not supported for outputType=application/xml

What step did I do wrong?

--EDIT--

I also uncommented these lines in server.yml and changed the basepackages to mine.

    ---
# User Extensions: Where XD scans the classpath to discover extended container configuration to add beans to the Plugins context.
# Each property may be a comma delimited string. 'basepackages' refers to package names used for
# annotated component (@Configuration or @Component stereotypes) scanning. 'locations' is a list of root resource directories containing XML or Groovy configuration.
# XD prepends classpath:* if no prefix included and appends **/*.* to each location
xd:
  extensions:
      basepackages: my.custom.mime.converter
      locations: META-INF/spring-xd/ext
---

Answer 1

You have to put the file in a narrow folder, eg /myCustomConverters in the jar; then you have to tell XD how to find it by uncommenting the configuration in serverys.yml ...

# User Extensions: Where XD scans the classpath to discover extended container configuration to add beans to the Plugins context.
# Each property may be a comma delimited string. 'basepackages' refers to package names used for
# annotated component (@Configuration or @Component stereotypes) scanning. 'locations' is a list of root resource directories containing XML or Groovy configuration.
# XD prepends classpath:* if no prefix included and appends **/*.* to each location
xd:
  extensions:
#      basepackages: com.acme.xd.extensions
#      locations: META-INF/spring-xd/ext
      locations: myCustomConverters