gistfile1.java

public class RouteBuilder implements Builder<String>, Value<String> {

    private static final String DELIMITER = ":";

    private final String serverName;
    private final InjectedValue<UndertowService> service = new InjectedValue<>();

    public RouteBuilder(String serverName) {
        this.serverName = serverName;
    }

    @Override
    public ServiceName getServiceName() {
        return UndertowService.SERVER.append(this.serverName, "route");
    }

    @Override
    public ServiceBuilder<String> build(ServiceTarget target) {
        return target.addService(this.getServiceName(), new ValueService<>(this))
                .addDependency(UndertowService.UNDERTOW, UndertowService.class, this.service)
                .setInitialMode(ServiceController.Mode.ON_DEMAND)
                ;
    }

    @Override
    public String getValue() {
        UndertowService service = this.service.getValue();
        String instanceId = service.getInstanceId();

        // Don't append server name for the default server
        if (this.serverName.equals(service.getDefaultServer())) return instanceId;

        StringBuilder builder = new StringBuilder(instanceId.length() + DELIMITER.length() + this.serverName.length());
        builder.append(instanceId);
        builder.append(DELIMITER);
        builder.append(this.serverName);
        return builder.toString();
    }
}