The page with the list of services is unavailable when using the camel-cxf component.

[tim08]

Previously(karaf 4.2.16, camel 2.25.4), when using camel-cxf, the following page was available,

I know that Camel 4 requires CXF 4+ (which has lost OSGI support), So you had to transfer over some of the functionality from the old version (thank you very much). I also saw the following comment
https://github.com/apache/camel-karaf/blob/camel-karaf-4.10.7/components/camel-cxf/camel-cxf-all/src/main/java/org/apache/camel/component/cxf/transport/http/osgi/HTTPTransportActivator.java#L57

But I don't really understand why if I install the following dependencies on clean Karaf 4.4.8 (which has OSGI 8):

feature:repo-add cxf 3.6.5 && feature:install cxf

I see that the page http://localhost:8181/cxf is available, and org.osgi.service.http.HttpService is also available.

What are the alternatives to restore this functionality for camel-cxf 4? Do I need an older version of OPS4J Pax Web API?

[jbonofre]

Thanks for the report. I gonna take a look.

[tim08]

I don't know how correct this is, I also tried to do the following:

• Install pax-web 11 (in karaf 4.4.8, for some reason, it's still the old version in the default distribution) https://mvnrepository.com/artifact/org.ops4j.pax.web/pax-web-features/11.1.0

• install the following blueprint:

<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:cxf="http://cxf.apache.org/blueprint/core"
           xsi:schemaLocation="
             http://www.osgi.org/xmlns/blueprint/v1.0.0
             https://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd">

    <cxf:bus/>
    <reference id="destinationRegistry" interface="org.apache.cxf.transport.http.DestinationRegistry"/>

    <service id="cxfServletService" interface="jakarta.servlet.Servlet">
        <service-properties>
            <entry key="alias" value="/cxf"/>
            <entry key="servlet-name" value="Services list"/>
        </service-properties>
        <bean class="org.apache.cxf.transport.servlet.CXFNonSpringServlet">
            <argument ref="destinationRegistry"/>
        </bean>
    </service>
    
</blueprint>

I tried to reproduce part of the logic that I found in the org.apache.camel.component.cxf.transport.http.osgi package.

<reference id="destinationRegistry" interface="org.apache.cxf.transport.http.DestinationRegistry"/> - this is getting a registered service https://github.com/apache/camel-karaf/blob/camel-karaf-4.10.7/components/camel-cxf/camel-cxf-all/src/main/java/org/apache/camel/component/cxf/transport/http/osgi/HTTPTransportActivator.java#L62

Now the page http://localhost:8181/cxf is available, but I don't see the service that I launched on camel-cxf.
I suspect that there might be a problem with the route (namely, with how the address property is now specified)

<osgi:blueprint
        xmlns:xs="http://www.w3.org/2001/XMLSchema"
        xmlns:camel="http://camel.apache.org/schema/blueprint"
        xmlns:osgi="http://www.osgi.org/xmlns/blueprint/v1.0.0"
        xmlns:cxf="https://camel.apache.org/schema/blueprint/cxf">
    

    <cxf:cxfEndpoint id="VerySimple" depends-on="VerySimple-context" 
                     address="http://localhost:8182/VerySimple"
                     xmlns:service="http://www.examples.com/wsdl/HelloService.wsdl"
                     serviceName="service:Hello_Service" 
                     endpointName="service:Hello_Port" 
                     wsdlURL="test_wsdl.WSDL">
        <cxf:properties>
            <osgi:entry key="dataFormat" value="PAYLOAD"/>
        </cxf:properties>
    </cxf:cxfEndpoint>

    <camel:camelContext id="VerySimple-context">
        <camel:route id="VerySimple-route">
            <camel:from uri="cxf:bean:VerySimple"/>
            <camel:to uri="log:proxy.VerySimple"/>
        </camel:route>
    </camel:camelContext>

</osgi:blueprint>    

Previously, it was enough to specify address=/VerySimple and the service was accessible at http://localhost:8181/cxf/VerySimple , but now if you specify it this way (address=/VerySimple) the bundle starts normally, but the service is unavailable

16:31:32.826 INFO [fileinstall-C:\karaf\apache-karaf-4.4.8/deploy] Blueprint bundle test-cxf-camel4-v2.xml/0.0.0 has been started
16:31:32.827 INFO [Blueprint Event Dispatcher: 1] Attempting to start CamelContext: VerySimple-context
16:31:32.832 INFO [Blueprint Event Dispatcher: 1] Apache Camel 4.10.7 (VerySimple-context) is starting
16:31:32.838 WARN [Blueprint Event Dispatcher: 1] The  endpoint/port name of cxf://bean:VerySimple is empty, cxf will try to load the first one in wsdl for you.
16:31:32.838 WARN [Blueprint Event Dispatcher: 1] The  service name of cxf://bean:VerySimple is empty, cxf will try to load the first one in wsdl for you.
16:31:32.846 INFO [Blueprint Event Dispatcher: 1] Creating Service {http://www.examples.com/wsdl/HelloService.wsdl}Hello_Service from WSDL: test_wsdl.WSDL
16:31:32.857 INFO [Blueprint Event Dispatcher: 1] Setting the server's publish address to be /VerySimple
16:31:32.858 INFO [Blueprint Event Dispatcher: 1] Initialized CXF Server: org.apache.cxf.endpoint.ServerImpl@e1ede6 in Payload mode with allow streaming: true
16:31:32.859 INFO [Blueprint Event Dispatcher: 1] Routes startup (total:1)
16:31:32.859 INFO [Blueprint Event Dispatcher: 1]     Started VerySimple-route (cxf://bean:VerySimple)
16:31:32.859 INFO [Blueprint Event Dispatcher: 1] Apache Camel 4.10.7 (VerySimple-context) started in 27ms (build:0ms init:0ms start:27ms)

Maybe I need to somehow use the services that are registered in https://github.com/apache/camel-karaf/blob/main/components/camel-cxf/camel-cxf-all/src/main/java/org/apache/camel/component/cxf/transport/http/osgi/HTTPTransportActivator.java

[tim08]

This might help figure out the problem: my current /cxf page (which I installed using the servlet mentioned above) doesn't show the installed services because the DestinationRegistry is empty:

karaf 4.4.8 - camel-cxf 4.10.7

karaf@root()> service:get org.apache.cxf.transport.http.DestinationRegistry
service:get org.apache.cxf.transport.http.DestinationRegistry
DestinationsPaths    []
SortedDestinations   []
Destinations         []

karaf 4.2.16 - camel-cxf 2.25.4

karaf@root()> service:get org.apache.cxf.transport.http.DestinationRegistry
DestinationsPaths    [/catalogs, /service1, /service2, /service3, http://0.0.0.0:9091/service4, /service5, /service6, /service7, /service8, /service9]
SortedDestinations   [org.apache.cxf.transport.servlet.ServletDestination@7bb01fe0, org.apache.cxf.transport.servlet.ServletDestination@443227a3, org.apache.cxf.transport.servlet.ServletDestination@f8d099d, org.apache.cxf.transport.http_jetty.JettyHTTPDestination@268bc202, org.apache.cxf.transport.servlet.ServletDestination@5dbf862c, org.apache.cxf.transport.servlet.ServletDestination@8e5ad07, org.apache.cxf.transport.servlet.ServletDestination@6f439c67, org.apache.cxf.transport.servlet.ServletDestination@1720c85f, org.apache.cxf.transport.servlet.ServletDestination@368fa271, org.apache.cxf.transport.servlet.ServletDestination@13a7bc32]
Destinations         [org.apache.cxf.transport.servlet.ServletDestination@7bb01fe0, org.apache.cxf.transport.servlet.ServletDestination@13a7bc32, org.apache.cxf.transport.servlet.ServletDestination@443227a3, org.apache.cxf.transport.servlet.ServletDestination@f8d099d, org.apache.cxf.transport.http_jetty.JettyHTTPDestination@268bc202, org.apache.cxf.transport.servlet.ServletDestination@8e5ad07, org.apache.cxf.transport.servlet.ServletDestination@1720c85f, org.apache.cxf.transport.servlet.ServletDestination@6f439c67, org.apache.cxf.transport.servlet.ServletDestination@368fa271, org.apache.cxf.transport.servlet.ServletDestination@5dbf862c]