Examples with Function ratpack.func.Function used on opensource projects

Example 6 with Function

use of ratpack.func.Function in project ratpack by ratpack.

the class RequestActionSupport method addCommonResponseHandlers.

private void addCommonResponseHandlers(ChannelPipeline p, Downstream<? super T> downstream) throws Exception {
    if (channelKey.ssl && p.get(SSL_HANDLER_NAME) == null) {
        // this is added once because netty is not able to properly replace this handler on
        // pooled channels from request to request. Because a pool is unique to a uri,
        // doing this works, as subsequent requests would be passing in the same certs.
        p.addLast(SSL_HANDLER_NAME, createSslHandler());
    }
    p.addLast(CLIENT_CODEC_HANDLER_NAME, new HttpClientCodec(4096, 8192, requestConfig.responseMaxChunkSize, false));
    p.addLast(READ_TIMEOUT_HANDLER_NAME, new ReadTimeoutHandler(requestConfig.readTimeout.toNanos(), TimeUnit.NANOSECONDS));
    p.addLast(REDIRECT_HANDLER_NAME, new SimpleChannelInboundHandler<HttpObject>(false) {

        boolean redirected;

        HttpResponse response;

        @Override
        public void channelInactive(ChannelHandlerContext ctx) throws Exception {
            ctx.fireExceptionCaught(new PrematureChannelClosureException("Server " + requestConfig.uri + " closed the connection prematurely"));
        }

        @Override
        protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception {
            if (msg instanceof HttpResponse) {
                this.response = (HttpResponse) msg;
                int maxRedirects = requestConfig.maxRedirects;
                int status = response.status().code();
                String locationValue = response.headers().getAsString(HttpHeaderConstants.LOCATION);
                Action<? super RequestSpec> redirectConfigurer = RequestActionSupport.this.requestConfigurer;
                if (isRedirect(status) && redirectCount < maxRedirects && locationValue != null) {
                    final Function<? super ReceivedResponse, Action<? super RequestSpec>> onRedirect = requestConfig.onRedirect;
                    if (onRedirect != null) {
                        final Action<? super RequestSpec> onRedirectResult = onRedirect.apply(toReceivedResponse(response));
                        if (onRedirectResult == null) {
                            redirectConfigurer = null;
                        } else {
                            redirectConfigurer = redirectConfigurer.append(onRedirectResult);
                        }
                    }
                    if (redirectConfigurer != null) {
                        Action<? super RequestSpec> redirectRequestConfig = s -> {
                            if (status == 301 || status == 302) {
                                s.get();
                            }
                        };
                        redirectRequestConfig = redirectConfigurer.append(redirectRequestConfig);
                        URI locationUrl;
                        if (ABSOLUTE_PATTERN.matcher(locationValue).matches()) {
                            locationUrl = new URI(locationValue);
                        } else {
                            locationUrl = new URI(channelKey.ssl ? "https" : "http", null, channelKey.host, channelKey.port, locationValue, null, null);
                        }
                        onRedirect(locationUrl, redirectCount + 1, redirectRequestConfig).connect(downstream);
                        redirected = true;
                        dispose(ctx.pipeline(), response);
                    }
                }
            }
            if (!redirected) {
                ctx.fireChannelRead(msg);
            }
        }
    });
    if (requestConfig.decompressResponse) {
        p.addLast(DECOMPRESS_HANDLER_NAME, new HttpContentDecompressor());
    }
    addResponseHandlers(p, downstream);
}

Example 7 with Function

use of ratpack.func.Function in project resilience4j by resilience4j.

the class RateLimiterChain method execute.

@Override
public void execute(Chain chain) throws Exception {
    String prefix = chain.getRegistry().get(Resilience4jConfig.class).getEndpoints().getRateLimiters().getPath();
    chain.prefix(prefix, chain1 -> {
        chain1.get("events", ctx -> Promise.<RateLimiterEventsEndpointResponse>async(d -> {
            List<RateLimiterEventDTO> eventsList = eventConsumerRegistry.getAllEventConsumer().flatMap(CircularEventConsumer::getBufferedEvents).sorted(Comparator.comparing(RateLimiterEvent::getCreationTime)).map(RateLimiterEventDTO::createRateLimiterEventDTO).toJavaList();
            d.success(new RateLimiterEventsEndpointResponse(eventsList));
        }).then(r -> ctx.render(Jackson.json(r))));
        chain1.get("stream/events", ctx -> {
            Seq<Flowable<RateLimiterEvent>> eventStreams = rateLimiterRegistry.getAllRateLimiters().map(rateLimiter -> RxJava2Adapter.toFlowable(rateLimiter.getEventPublisher()));
            Function<RateLimiterEvent, String> data = r -> Jackson.getObjectWriter(chain1.getRegistry()).writeValueAsString(RateLimiterEventDTO.createRateLimiterEventDTO(r));
            ServerSentEvents events = ServerSentEvents.serverSentEvents(Flowable.merge(eventStreams), e -> e.id(RateLimiterEvent::getRateLimiterName).event(c -> c.getEventType().name()).data(data));
            ctx.render(events);
        });
        chain1.get("events/:name", ctx -> {
            String rateLimiterName = ctx.getPathTokens().get("name");
            Promise.<RateLimiterEventsEndpointResponse>async(d -> {
                List<RateLimiterEventDTO> eventsList = eventConsumerRegistry.getEventConsumer(rateLimiterName).getBufferedEvents().sorted(Comparator.comparing(RateLimiterEvent::getCreationTime)).map(RateLimiterEventDTO::createRateLimiterEventDTO).toJavaList();
                d.success(new RateLimiterEventsEndpointResponse(eventsList));
            }).then(r -> ctx.render(Jackson.json(r)));
        });
        chain1.get("stream/events/:name", ctx -> {
            String rateLimiterName = ctx.getPathTokens().get("name");
            RateLimiter rateLimiter = rateLimiterRegistry.getAllRateLimiters().find(rL -> rL.getName().equals(rateLimiterName)).getOrElseThrow(() -> new IllegalArgumentException(String.format("rate limiter with name %s not found", rateLimiterName)));
            Function<RateLimiterEvent, String> data = r -> Jackson.getObjectWriter(chain1.getRegistry()).writeValueAsString(RateLimiterEventDTO.createRateLimiterEventDTO(r));
            ServerSentEvents events = ServerSentEvents.serverSentEvents(RxJava2Adapter.toFlowable(rateLimiter.getEventPublisher()), e -> e.id(RateLimiterEvent::getRateLimiterName).event(c -> c.getEventType().name()).data(data));
            ctx.render(events);
        });
        chain1.get("events/:name/:type", ctx -> {
            String rateLimiterName = ctx.getPathTokens().get("name");
            String eventType = ctx.getPathTokens().get("type");
            Promise.<RateLimiterEventsEndpointResponse>async(d -> {
                List<RateLimiterEventDTO> eventsList = eventConsumerRegistry.getEventConsumer(rateLimiterName).getBufferedEvents().sorted(Comparator.comparing(RateLimiterEvent::getCreationTime)).filter(event -> event.getEventType() == RateLimiterEvent.Type.valueOf(eventType.toUpperCase())).map(RateLimiterEventDTO::createRateLimiterEventDTO).toJavaList();
                d.success(new RateLimiterEventsEndpointResponse(eventsList));
            }).then(r -> ctx.render(Jackson.json(r)));
        });
        chain1.get("stream/events/:name/:type", ctx -> {
            String rateLimiterName = ctx.getPathTokens().get("name");
            String eventType = ctx.getPathTokens().get("type");
            RateLimiter rateLimiter = rateLimiterRegistry.getAllRateLimiters().find(rL -> rL.getName().equals(rateLimiterName)).getOrElseThrow(() -> new IllegalArgumentException(String.format("rate limiter with name %s not found", rateLimiterName)));
            Flowable<RateLimiterEvent> eventStream = RxJava2Adapter.toFlowable(rateLimiter.getEventPublisher()).filter(event -> event.getEventType() == RateLimiterEvent.Type.valueOf(eventType.toUpperCase()));
            Function<RateLimiterEvent, String> data = r -> Jackson.getObjectWriter(chain1.getRegistry()).writeValueAsString(RateLimiterEventDTO.createRateLimiterEventDTO(r));
            ServerSentEvents events = ServerSentEvents.serverSentEvents(eventStream, e -> e.id(RateLimiterEvent::getRateLimiterName).event(c -> c.getEventType().name()).data(data));
            ctx.render(events);
        });
    });
}

Example 8 with Function

use of ratpack.func.Function in project resilience4j by resilience4j.

the class CircuitBreakerChain method execute.

@Override
public void execute(Chain chain) throws Exception {
    String prefix = chain.getRegistry().get(Resilience4jConfig.class).getEndpoints().getCircuitBreakers().getPath();
    chain.prefix(prefix, chain1 -> {
        chain1.get("events", ctx -> Promise.<CircuitBreakerEventsEndpointResponse>async(d -> {
            CircuitBreakerEventsEndpointResponse response = new CircuitBreakerEventsEndpointResponse(eventConsumerRegistry.getAllEventConsumer().flatMap(CircularEventConsumer::getBufferedEvents).sorted(Comparator.comparing(CircuitBreakerEvent::getCreationTime)).map(CircuitBreakerEventDTOFactory::createCircuitBreakerEventDTO).toJavaList());
            d.success(response);
        }).then(r -> ctx.render(Jackson.json(r))));
        chain1.get("stream/events", ctx -> {
            Seq<Flowable<CircuitBreakerEvent>> eventStreams = circuitBreakerRegistry.getAllCircuitBreakers().map(circuitBreaker -> RxJava2Adapter.toFlowable(circuitBreaker.getEventPublisher()));
            Function<CircuitBreakerEvent, String> data = c -> Jackson.getObjectWriter(chain1.getRegistry()).writeValueAsString(CircuitBreakerEventDTOFactory.createCircuitBreakerEventDTO(c));
            ServerSentEvents events = ServerSentEvents.serverSentEvents(Flowable.merge(eventStreams), e -> e.id(CircuitBreakerEvent::getCircuitBreakerName).event(c -> c.getEventType().name()).data(data));
            ctx.render(events);
        });
        chain1.get("events/:name", ctx -> {
            String circuitBreakerName = ctx.getPathTokens().get("name");
            Promise.<CircuitBreakerEventsEndpointResponse>async(d -> {
                CircuitBreakerEventsEndpointResponse response = new CircuitBreakerEventsEndpointResponse(eventConsumerRegistry.getEventConsumer(circuitBreakerName).getBufferedEvents().map(CircuitBreakerEventDTOFactory::createCircuitBreakerEventDTO).toJavaList());
                d.success(response);
            }).then(r -> ctx.render(Jackson.json(r)));
        });
        chain1.get("stream/events/:name", ctx -> {
            String circuitBreakerName = ctx.getPathTokens().get("name");
            CircuitBreaker circuitBreaker = circuitBreakerRegistry.getAllCircuitBreakers().find(cb -> cb.getName().equals(circuitBreakerName)).getOrElseThrow(() -> new IllegalArgumentException(String.format("circuit breaker with name %s not found", circuitBreakerName)));
            Function<CircuitBreakerEvent, String> data = c -> Jackson.getObjectWriter(chain1.getRegistry()).writeValueAsString(CircuitBreakerEventDTOFactory.createCircuitBreakerEventDTO(c));
            ServerSentEvents events = ServerSentEvents.serverSentEvents(RxJava2Adapter.toFlowable(circuitBreaker.getEventPublisher()), e -> e.id(CircuitBreakerEvent::getCircuitBreakerName).event(c -> c.getEventType().name()).data(data));
            ctx.render(events);
        });
        chain1.get("events/:name/:type", ctx -> {
            String circuitBreakerName = ctx.getPathTokens().get("name");
            String eventType = ctx.getPathTokens().get("type");
            Promise.<CircuitBreakerEventsEndpointResponse>async(d -> {
                CircuitBreakerEventsEndpointResponse response = new CircuitBreakerEventsEndpointResponse(eventConsumerRegistry.getEventConsumer(circuitBreakerName).getBufferedEvents().filter(event -> event.getEventType() == CircuitBreakerEvent.Type.valueOf(eventType.toUpperCase())).map(CircuitBreakerEventDTOFactory::createCircuitBreakerEventDTO).toJavaList());
                d.success(response);
            }).then(r -> ctx.render(Jackson.json(r)));
        });
        chain1.get("stream/events/:name/:type", ctx -> {
            String circuitBreakerName = ctx.getPathTokens().get("name");
            String eventType = ctx.getPathTokens().get("type");
            CircuitBreaker circuitBreaker = circuitBreakerRegistry.getAllCircuitBreakers().find(cb -> cb.getName().equals(circuitBreakerName)).getOrElseThrow(() -> new IllegalArgumentException(String.format("circuit breaker with name %s not found", circuitBreakerName)));
            Flowable<CircuitBreakerEvent> eventStream = RxJava2Adapter.toFlowable(circuitBreaker.getEventPublisher()).filter(event -> event.getEventType() == CircuitBreakerEvent.Type.valueOf(eventType.toUpperCase()));
            Function<CircuitBreakerEvent, String> data = c -> Jackson.getObjectWriter(chain1.getRegistry()).writeValueAsString(CircuitBreakerEventDTOFactory.createCircuitBreakerEventDTO(c));
            ServerSentEvents events = ServerSentEvents.serverSentEvents(eventStream, e -> e.id(CircuitBreakerEvent::getCircuitBreakerName).event(c -> c.getEventType().name()).data(data));
            ctx.render(events);
        });
    });
}