Examples with PollableBean org.springframework.cloud.function.context.PollableBean used on opensource projects

Example 1 with PollableBean

use of org.springframework.cloud.function.context.PollableBean in project spring-cloud-stream by spring-cloud.

the class FunctionConfiguration method integrationFlowFromProvidedSupplier.

@SuppressWarnings({ "rawtypes", "unchecked" })
private IntegrationFlowBuilder integrationFlowFromProvidedSupplier(Supplier<?> supplier, Publisher<Object> beginPublishingTrigger, PollableBean pollable, GenericApplicationContext context, TaskScheduler taskScheduler, ProducerProperties producerProperties, String bindingName) {
    IntegrationFlowBuilder integrationFlowBuilder;
    boolean splittable = pollable != null && (boolean) AnnotationUtils.getAnnotationAttributes(pollable).get("splittable");
    FunctionInvocationWrapper function = (supplier instanceof PartitionAwareFunctionWrapper) ? (FunctionInvocationWrapper) ((PartitionAwareFunctionWrapper) supplier).function : (FunctionInvocationWrapper) supplier;
    boolean reactive = FunctionTypeUtils.isPublisher(function.getOutputType());
    if (pollable == null && reactive) {
        Publisher publisher = (Publisher) supplier.get();
        publisher = publisher instanceof Mono ? ((Mono) publisher).delaySubscription(beginPublishingTrigger).map(this::wrapToMessageIfNecessary) : ((Flux) publisher).delaySubscription(beginPublishingTrigger).map(this::wrapToMessageIfNecessary);
        integrationFlowBuilder = IntegrationFlows.from(publisher);
        // see https://github.com/spring-cloud/spring-cloud-stream/issues/1863 for details about the following code
        // will keep AC alive
        taskScheduler.schedule(() -> {
        }, Instant.now());
    } else {
        // implies pollable
        boolean autoStartup = producerProperties != null ? producerProperties.isAutoStartup() : true;
        integrationFlowBuilder = IntegrationFlows.fromSupplier(supplier, spca -> spca.id(bindingName + "_spca").autoStartup(autoStartup));
        // only apply the PollableBean attributes if this is a reactive function.
        if (splittable && reactive) {
            integrationFlowBuilder = integrationFlowBuilder.split();
        }
    }
    return integrationFlowBuilder;
}

Example 2 with PollableBean

use of org.springframework.cloud.function.context.PollableBean in project spring-cloud-stream by spring-cloud.

the class FunctionConfiguration method supplierInitializer.

/*
	 * Binding initializer responsible only for Suppliers
	 */
@Bean
InitializingBean supplierInitializer(FunctionCatalog functionCatalog, StreamFunctionProperties functionProperties, GenericApplicationContext context, BindingServiceProperties serviceProperties, @Nullable List<BindableFunctionProxyFactory> proxyFactories, StreamBridge streamBridge, TaskScheduler taskScheduler) {
    if (CollectionUtils.isEmpty(proxyFactories)) {
        return null;
    }
    return new InitializingBean() {

        @SuppressWarnings("rawtypes")
        @Override
        public void afterPropertiesSet() throws Exception {
            for (BindableFunctionProxyFactory proxyFactory : proxyFactories) {
                FunctionInvocationWrapper functionWrapper = functionCatalog.lookup(proxyFactory.getFunctionDefinition());
                if (functionWrapper != null && functionWrapper.isSupplier()) {
                    // gather output content types
                    List<String> contentTypes = new ArrayList<String>();
                    if (proxyFactory.getOutputs().size() == 0) {
                        return;
                    }
                    Assert.isTrue(proxyFactory.getOutputs().size() == 1, "Supplier with multiple outputs is not supported at the moment.");
                    String outputName = proxyFactory.getOutputs().iterator().next();
                    BindingProperties bindingProperties = serviceProperties.getBindingProperties(outputName);
                    ProducerProperties producerProperties = bindingProperties.getProducer();
                    if (!(bindingProperties.getProducer() != null && producerProperties.isUseNativeEncoding())) {
                        contentTypes.add(bindingProperties.getContentType());
                    }
                    // see https://github.com/spring-cloud/spring-cloud-stream/issues/2027
                    String functionDefinition = proxyFactory.getFunctionDefinition();
                    String[] functionNames = StringUtils.delimitedListToStringArray(functionDefinition.replaceAll(",", "|").trim(), "|");
                    Function supplier = null;
                    Function function = null;
                    if (!ObjectUtils.isEmpty(functionNames) && functionNames.length > 1) {
                        String supplierName = functionNames[0];
                        String remainingFunctionDefinition = StringUtils.arrayToCommaDelimitedString(Arrays.copyOfRange(functionNames, 1, functionNames.length));
                        supplier = functionCatalog.lookup(supplierName);
                        function = functionCatalog.lookup(remainingFunctionDefinition, contentTypes.toArray(new String[0]));
                        if (!((FunctionInvocationWrapper) supplier).isOutputTypePublisher() && ((FunctionInvocationWrapper) function).isInputTypePublisher()) {
                            functionWrapper = null;
                        } else {
                            functionWrapper = functionCatalog.lookup(proxyFactory.getFunctionDefinition(), contentTypes.toArray(new String[0]));
                        }
                    } else {
                        functionWrapper = functionCatalog.lookup(proxyFactory.getFunctionDefinition(), contentTypes.toArray(new String[0]));
                    }
                    Publisher<Object> beginPublishingTrigger = setupBindingTrigger(context);
                    if (!functionProperties.isComposeFrom() && !functionProperties.isComposeTo()) {
                        String integrationFlowName = proxyFactory.getFunctionDefinition() + "_integrationflow";
                        PollableBean pollable = extractPollableAnnotation(functionProperties, context, proxyFactory);
                        if (functionWrapper != null) {
                            // Type functionType = functionWrapper.getFunctionType();
                            IntegrationFlow integrationFlow = integrationFlowFromProvidedSupplier(new PartitionAwareFunctionWrapper(functionWrapper, context, producerProperties), beginPublishingTrigger, pollable, context, taskScheduler, producerProperties, outputName).route(Message.class, message -> {
                                if (message.getHeaders().get("spring.cloud.stream.sendto.destination") != null) {
                                    String destinationName = (String) message.getHeaders().get("spring.cloud.stream.sendto.destination");
                                    return streamBridge.resolveDestination(destinationName, producerProperties, null);
                                }
                                return outputName;
                            }).get();
                            IntegrationFlow postProcessedFlow = (IntegrationFlow) context.getAutowireCapableBeanFactory().applyBeanPostProcessorsBeforeInitialization(integrationFlow, integrationFlowName);
                            context.registerBean(integrationFlowName, IntegrationFlow.class, () -> postProcessedFlow);
                        } else {
                            // Type functionType = ((FunctionInvocationWrapper) supplier).getFunctionType();
                            IntegrationFlow integrationFlow = integrationFlowFromProvidedSupplier(new PartitionAwareFunctionWrapper(supplier, context, producerProperties), beginPublishingTrigger, pollable, context, taskScheduler, producerProperties, outputName).channel(c -> c.direct()).fluxTransform((Function<? super Flux<Message<Object>>, ? extends Publisher<Object>>) function).route(Message.class, message -> {
                                if (message.getHeaders().get("spring.cloud.stream.sendto.destination") != null) {
                                    String destinationName = (String) message.getHeaders().get("spring.cloud.stream.sendto.destination");
                                    return streamBridge.resolveDestination(destinationName, producerProperties, null);
                                }
                                return outputName;
                            }).get();
                            IntegrationFlow postProcessedFlow = (IntegrationFlow) context.getAutowireCapableBeanFactory().applyBeanPostProcessorsBeforeInitialization(integrationFlow, integrationFlowName);
                            context.registerBean(integrationFlowName, IntegrationFlow.class, () -> postProcessedFlow);
                        }
                    }
                }
            }
        }
    };
}

Example 3 with PollableBean

use of org.springframework.cloud.function.context.PollableBean in project spring-cloud-stream by spring-cloud.

the class FunctionConfiguration method extractPollableAnnotation.

private PollableBean extractPollableAnnotation(StreamFunctionProperties functionProperties, GenericApplicationContext context, BindableFunctionProxyFactory proxyFactory) {
    // here we need to ensure that for cases where composition is defined we only look for supplier method to find Pollable annotation.
    String supplierFunctionName = StringUtils.delimitedListToStringArray(proxyFactory.getFunctionDefinition().replaceAll(",", "|").trim(), "|")[0];
    BeanDefinition bd = context.getBeanDefinition(supplierFunctionName);
    if (!(bd instanceof RootBeanDefinition)) {
        return null;
    }
    Method factoryMethod = ((RootBeanDefinition) bd).getResolvedFactoryMethod();
    if (factoryMethod == null) {
        Object source = bd.getSource();
        if (source instanceof MethodMetadata) {
            Class<?> factory = ClassUtils.resolveClassName(((MethodMetadata) source).getDeclaringClassName(), null);
            Class<?>[] params = FunctionContextUtils.getParamTypesFromBeanDefinitionFactory(factory, (RootBeanDefinition) bd);
            factoryMethod = ReflectionUtils.findMethod(factory, ((MethodMetadata) source).getMethodName(), params);
        }
    }
    Assert.notNull(factoryMethod, "Failed to introspect factory method since it was not discovered for function '" + functionProperties.getDefinition() + "'");
    return factoryMethod.getReturnType().isAssignableFrom(Supplier.class) ? AnnotationUtils.findAnnotation(factoryMethod, PollableBean.class) : null;
}