Swordfish Documentation: Architecture: Internal Service Proxy

From Eclipsepedia

Jump to: navigation, search

1 Overview
2 Description
- 2.1 Component diagrams
  - 2.1.1 Sketch of сomponent сlasses for internal Service Proxy Plugin
3 See also

Overview

The internal service proxy allows plugins to access the NMR inside Swordfish.

Description

Component diagrams

Sketch of сomponent сlasses for internal Service Proxy Plugin

Example of ServiceProxy usage:

proxy injection (at runtime available as OSGi service):

    <osgi:reference id="serviceProxy"
    	interface="org.eclipse.swordfish.core.proxy.ServiceProxy" />

    <bean id="ASFRegistryProvider"
        class="org.eclipse.swordfish.internal.resolver.backend.remote.ASFRegistryProvider"
        p:proxy-ref="serviceProxy"/>

invocation of target service:

public class ASFRegistryProvider extends AbstractDocumentProvider {

    private ServiceProxy proxy;

    @Override
    public Collection<ServiceDescription<?>> getServiceProviderDescriptions(QName interfaceName) {
        String res = null;
        try {
            res = proxy.invokeRequestResponseOperation(
                QName.valueOf("{http://services.sopware.org/registry/ServiceRegistryProvider/1.0}ServiceRegistryProvider"),
                QName.valueOf("{http://services.sopware.org/registry/ServiceRegistryProvider/1.0}xlookUp_serviceProvider"),
                "<inMessage/>");
        } catch (Exception e) {
            e.printStackTrace();
        }

        // further processing...

        return null;
    }

    public void setProxy(ServiceProxy proxy) {
        this.proxy = proxy;
    }

}

During invocation ServiceProxy performs the following steps:

creates new NMR Exchange for provided operation;
looks up outbound endpoint from the NMR using provided service name;
sends exchange to NMR according to selected message exchange pattern (e.g. "http://www.w3.org/ns/wsdl/in-out").

NOTE: Current version of proxy assumes that outbound endpoint of target service is already registered within ServiceMix NMR.