@Override
    public IApiConnection connect(ApiRequest request,
            IAsyncResultHandler<IApiConnectionResponse> handler) throws ConnectorException {
        this.handler = handler;
        this.connected = true;
        return this;
    }
@see io.apiman.gateway.engine.IApiConnector#connect(io.apiman.gateway.engine.beans.ApiRequest, io.apiman.gateway.engine.async.IAsyncResultHandler)
gateway/engine/policies/src/main/java/io/apiman/gateway/engine/policies/caching/CacheConnectorInterceptor.java