How to use references using multiplicity="1..n" with binding.ws or binding.rmi

[Daniel.Stucky]

Hi all,

I have set up a composite, where service CrawlerControllerComponent has
one or more references to Crawlers. This runs without any problem using
binding.sca. Here is the content of the .compiste file, where 2 Crawlers
are refferenced:

<composite      xmlns="http://www.osoa.org/xmlns/sca/1.0";
                xmlns:t="http://tuscany.apache.org/xmlns/sca/1.0";
                xmlns:s="http://connectivity";                   
                name="connectivity">

        <component name="CrawlerControllerComponent">
                <implementation.java
class="impl.CrawlerControllerImpl"/>
                <service name="CrawlerController">
                        <interface.java
interface="interfaces.CrawlerController" />
                </service>
                <reference name="connectivity"
target="ConnectivityComponent">
                        <binding.sca />
                </reference>            
                <reference name="crawlers" multiplicity="1..n"
target="CrawlerComponent SpecialCrawlerComponent">              
                </reference>

        </component>

        <component name="ConnectivityComponent">
                <implementation.java class="impl.ConnectivityImpl"/>
                <service name="Connectivity">
                        <interface.java
interface="interfaces.Connectivity" />
                </service>
        </component>
    
        <component name="CrawlerComponent">
                <implementation.java class="impl.CrawlerImpl"/>
                <service name="Crawler">
                        <interface.java interface="interfaces.Crawler"
/>
                </service>
                <property name="crawlerId">normal_crawler</property>

        </component>    
        
        <component name="SpecialCrawlerComponent">
                <implementation.java class="impl.SpecialCrawlerImpl"/>
                <service name="Crawler">
                        <interface.java interface="interfaces.Crawler"
/>
                </service>
                <property name="crawlerId">special_crawler</property>
        </component>    
</composite>


But what do I have to do, to make this sample work using binding.ws (or
binding.rmi) ???

Just adding <binding.ws ...> to CrawlerComponent and
SpecialCrawlerComponent leads to the following warning
WARNUNG: Component reference doesn't have a matching binding

I tried to configure multiple <binding> tags, but then both target
entries of reference "crawlers" use the first binding tag (in this case
http://AFA-19393:8088/CrawlerComponent). How can I have the targets use
different bindings ?

<composite      xmlns="http://www.osoa.org/xmlns/sca/1.0";
                xmlns:t="http://tuscany.apache.org/xmlns/sca/1.0";
                xmlns:s="http://connectivity";                   
                name="connectivity">

        <component name="CrawlerControllerComponent">
                <implementation.java
class="impl.CrawlerControllerImpl"/>
                <service name="CrawlerController">
                        <interface.java
interface="interfaces.CrawlerController" />
                </service>
                <reference name="connectivity"
target="ConnectivityComponent">
                        <binding.sca />
                </reference>            
                <reference name="crawlers" multiplicity="1..n"
target="CrawlerComponent SpecialCrawlerComponent">
                        <binding.ws
uri="http://AFA-19393:8088/CrawlerComponent"; target="CrawlerComponent"
/>      
                        <binding.ws
uri="http://AFA-19393:8088/SpecialCrawlerComponent";
target="SpecialCrawlerComponent"/>              
                </reference>

        </component>

        <component name="ConnectivityComponent">
                <implementation.java class="impl.ConnectivityImpl"/>
                <service name="Connectivity">
                        <interface.java
interface="interfaces.Connectivity" />
                </service>
        </component>
    
        <component name="CrawlerComponent">
                <implementation.java class="impl.CrawlerImpl"/>
                <service name="Crawler">
                        <interface.java interface="interfaces.Crawler"
/>                                              
                        <binding.ws
uri="http://AFA-19393:8088/CrawlerComponent"; />                 
                </service>
                <property name="crawlerId">normal_crawler</property>

        </component>    
        
        <component name="SpecialCrawlerComponent">
                <implementation.java class="impl.SpecialCrawlerImpl"/>
                <service name="Crawler">
                        <interface.java interface="interfaces.Crawler"
/>
                        <binding.ws
uri="http://AFA-19393:8088/SpecialCrawlerComponent"; />                  
                </service>
                <property name="crawlerId">special_crawler</property>
        </component>    
</composite>


Bye,
Daniel