public ForwardHttpQueueConfig build() {
            return new ForwardHttpQueueConfig(
                    queueAndRetryEnabled,
                    forwardDelay,
                    retryDelay,
                    retryDelayGrowthFactor,
                    maxRetryDelay,
                    maxRetryAge,
                    errorSubPathTemplate,
                    forwardThreadCount,
                    forwardRetryThreadCount,
                    livenessCheckInterval);
        }
Subclass it so we can have different defaults between file/http
stroom-proxy/stroom-proxy-app/src/main/java/stroom/proxy/app/handler/ForwardHttpQueueConfig.java