Examples with OptionalConsumer org.apache.flink.util.OptionalConsumer used on opensource projects

Example 1 with OptionalConsumer

use of org.apache.flink.util.OptionalConsumer in project flink by apache.

the class LeaderRetrievalHandler method channelRead0.

@Override
protected void channelRead0(ChannelHandlerContext channelHandlerContext, RoutedRequest routedRequest) {
    HttpRequest request = routedRequest.getRequest();
    OptionalConsumer<? extends T> optLeaderConsumer = OptionalConsumer.of(leaderRetriever.getNow());
    optLeaderConsumer.ifPresent(gateway -> {
        try {
            respondAsLeader(channelHandlerContext, routedRequest, gateway);
        } catch (Exception e) {
            logger.error("Error while responding to the http request.", e);
            HandlerUtils.sendErrorResponse(channelHandlerContext, request, new ErrorResponseBody("Error while responding to the http request."), HttpResponseStatus.INTERNAL_SERVER_ERROR, responseHeaders);
        }
    }).ifNotPresent(() -> HandlerUtils.sendErrorResponse(channelHandlerContext, request, new ErrorResponseBody("Service temporarily unavailable due to an ongoing leader election. Please refresh."), HttpResponseStatus.SERVICE_UNAVAILABLE, responseHeaders));
}