Remote Invoker - SwitchYard

The RemoteInvoker serves as a remote invocation client for SwitchYard services. It allows non-SwitchYard applications to invoke any service in SwitchYard which uses a <binding.sca> binding. It is also used by the internal clustering channel to facilitate intra-cluster communication between instances.

Using the RemoteInvoker

RemoteInvoker and supporting classes can be included in your application via the following Maven dependency:

<dependency>
   <groupId>org.switchyard</groupId>
   <artifactId>switchyard-remote</artifactId>
   <version> <!-- SY version goes here (e.g. 0.8.0.Final) --> </version>
</dependency>

Each instance of SY includes a special context path called "switchyard-remote" which is bound to the default HTTP listener in AS 7. The initial version of RemoteInvoker supports communication with this endpoint directly. Here's an example of invoking an in-out service in SY using the HttpInvoker:

public class MyClient {
    public static void main(String[] args) throws Exception {
        RemoteInvoker invoker = new HttpInvoker("http://localhost:8080/switchyard-remote");
        Offer offer = new Offer();
        offer.setAmount(100);
        offer.setItem("honda");
        
        RemoteMessage msg = invoker.invoke(new RemoteMessage()
            .setContext(new DefaultContext())
            .setService(new QName("urn:com.example.switchyard:remote", "Dealer"))
            .setContent(offer));
        
        Deal deal = (Deal)msg.getContent();
        System.out.println("It's a deal? " + deal.isAccepted());
    }
}

The remote-invoker quickstart serves as a nice example of using RemoteInvoker with a SwitchYard application.