Question

Has anyone been able to successfully share configuration between two or more bundles in SMX4? What I’m looking for is this:

1. Have a single file in $SMX_HOME/etc/myconfiguration.cfg
2. Have this configuration be “available” to be injected into my bundles via the OSGi Configuration Admin using Spring dm, i.e.

<beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:osgi="http://www.springframework.org/schema/osgi"
        xmlns:osgix="http://www.springframework.org/schema/osgi-compendium"
        xmlns:ctx="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
                            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
                            http://www.springframework.org/schema/osgi http://www.springframework.org/schema/osgi/spring-osgi-1.2.xsd
                            http://www.springframework.org/schema/osgi-compendium http://www.springframework.org/schema/osgi-compendium/spring-osgi-compendium-1.2.xsd">

        <osgix:cm-properties id="cfg"
            persistent-id="myconfiguration">
            <prop key="db.driverClassName">org.postgresql.Driver</prop>
            <prop key="db.url">jdbc:postgresql://localhost/db</prop>
            <prop key="db.username">someuser</prop>
            <prop key="db.password">somepassword</prop>
            <prop key="amq.brokerURL">vm://default</prop>
        </osgix:cm-properties>

        <ctx:property-placeholder properties-ref="cfg" />

Then, I can inject things like this into my bean(s):

    
    .
    .
    .
        <bean id="activeMqConnectionFactory"
            class="org.apache.activemq.ActiveMQConnectionFactory">
            <property name="brokerURL" value="${amq.brokerURL}" />
        </bean>
    .
    .
    .

All of that is just peachy, for a single bundle. What I am looking for is a way to define this once and then be able to reuse the same configuration file as properties for a set of bundles. Right now, I have multiple bundles, each with their own configuration instance (persistent id) and thus, each bundle that needs a database connection, Java JMS, etc. has to have the configuration repeated in every file.

Currently, I’m using Apache Servicemix 4, which is using Apache Felix as the OSGi container.

Answer 1

I share my configuration located in

$SMX_HOME/etc/my.config.cfg

using this declaration

<!-- get properties as bean from OSGi Configuration Admin Service -->
<osgix:cm-properties id="myConfig" persistent-id="my.config" />

<!-- activate ${...} placeholder -->
<ctx:property-placeholder properties-ref="myConfig" />

in each of my bundles. Looks quite similar to your solution and works perfect!
You can share your configuration (do not need to provide a configuration file for each bundle) but you have to declare the reference to this configuration in each spring-application-context file.

Im using FUSE 4.3 which is based on apache-servicemix-4.3.0-fuse-01-00.