Help with CAMEL-9570 - Blueprint and OSGi Dynamic Service Changes

[Quinn Stevenson]

I’ve been trying to figure out what’s going on with this issue ( 
https://issues.apache.org/jira/browse/CAMEL-9570 
<https://issues.apache.org/jira/browse/CAMEL-9570> ) for quite a while now, and 
I’m not getting anywhere - I could really use some guidance.

I have a very simple route builder

public class ServiceConsumerBuilder extends RouteBuilder{
    Logger log = LoggerFactory.getLogger(this.getClass());

    String beanId = "osgi-service";
    String timerName = "default-timer";

    Object beanInstance;

    public ServiceConsumerBuilder() {
    }

    @Override
    public void configure() throws Exception {
        fromF( "timer://%s?period=%d&fixedRate=%b", timerName, 5000, true)
            .routeId( "java-route")
            .setBody().constant( "Dummy Value")
            // .bean( beanInstance, "execute", false)
            .toF( "bean://%s?cache=%b&method=%s", beanId, false, "execute")
            .to( "mock://result")
            ;

    }

    public String getTimerName() {
        return timerName;
    }

    public void setTimerName(String timerName) {
        this.timerName = timerName;
    }

    public String getBeanId() {
        return beanId;
    }

    public void setBeanId(String beanId) {
        this.beanId = beanId;
    }

    public Object getBeanInstance() {
        return beanInstance;
    }

    public void setBeanInstance(Object beanInstance) {
        Exception ex = new Exception();
        ex.fillInStackTrace();
        log.info( "Setting beanInstance", ex );

        this.beanInstance = beanInstance;
    }

    public static void main( String[] args ) {
        System.out.println( "Hello");

    }
}

And when I used the following blueprint, everything works great - dynamic 
service changes are picked up.

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0";
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
           
xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.1.0";
           xmlns:camel="http://camel.apache.org/schema/blueprint";
           xsi:schemaLocation="
         http://www.osgi.org/xmlns/blueprint/v1.0.0 
http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd
         http://camel.apache.org/schema/blueprint 
http://camel.apache.org/schema/blueprint/camel-blueprint.xsd";>

    <cm:property-placeholder persistent-id="blueprint-test" 
update-strategy="reload" >
        <cm:default-properties>
            <cm:property name="timer-name" value="blueprint-consumer" />
        </cm:default-properties>
    </cm:property-placeholder>

    <reference id="osgi-service" 
interface="com.pronoia.osgi.service.MyServiceInterface" 
filter="implementation=bp-external"/>

    <bean id="java-route" 
class="com.pronoia.camel.builder.ServiceConsumerBuilder" >
        <property name="beanId" value="osgi-service" />
        <property name="timerName" value="java-${timer-name}" />
    </bean>

    <camelContext id="blueprint-context" 
xmlns="http://camel.apache.org/schema/blueprint";>
        <routeBuilder ref="java-route" />
    </camelContext>

</blueprint>
However, as soon as change the blueprint to the following (I just inject the 
service reference into the route builder - but it’s never used/called), I no 
longer get dynamic updates.

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0";
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
           
xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.1.0";
           xmlns:camel="http://camel.apache.org/schema/blueprint";
           xsi:schemaLocation="
         http://www.osgi.org/xmlns/blueprint/v1.0.0 
http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd
         http://camel.apache.org/schema/blueprint 
http://camel.apache.org/schema/blueprint/camel-blueprint.xsd";>

    <cm:property-placeholder persistent-id="blueprint-test" 
update-strategy="reload" >
        <cm:default-properties>
            <cm:property name="timer-name" value="blueprint-consumer" />
        </cm:default-properties>
    </cm:property-placeholder>

    <reference id="osgi-service" 
interface="com.pronoia.osgi.service.MyServiceInterface" 
filter="implementation=bp-external"/>

    <bean id="java-route" 
class="com.pronoia.camel.builder.ServiceConsumerBuilder" >
        <property name="beanId" value="osgi-service" />
        <property name="beanInstance" ref="osgi-service" />
        <property name="timerName" value="java-${timer-name}" />
    </bean>

    <camelContext id="blueprint-context" 
xmlns="http://camel.apache.org/schema/blueprint";>
        <routeBuilder ref="java-route" />
    </camelContext>

</blueprint>
I’ve been running this in a debugger and trying to figure out what’s going on, 
but I’m stuck.  Any help/suggestions would be GREATLY appreciated.