Examples with ReactiveAdapter cn.taketoday.core.ReactiveAdapter used on opensource projects

Example 6 with ReactiveAdapter

use of cn.taketoday.core.ReactiveAdapter in project today-infrastructure by TAKETODAY.

the class TransactionAspectSupport method invokeWithinTransaction.

/**
 * General delegate for around-advice-based subclasses, delegating to several other template
 * methods on this class. Able to handle {@link CallbackPreferringPlatformTransactionManager}
 * as well as regular {@link PlatformTransactionManager} implementations and
 * {@link ReactiveTransactionManager} implementations for reactive return types.
 *
 * @param method the Method being invoked
 * @param targetClass the target class that we're invoking the method on
 * @param invocation the callback to use for proceeding with the target invocation
 * @return the return value of the method, if any
 * @throws Throwable propagated from the target invocation
 */
@Nullable
protected Object invokeWithinTransaction(Method method, @Nullable Class<?> targetClass, final InvocationCallback invocation) throws Throwable {
    // If the transaction attribute is null, the method is non-transactional.
    TransactionAttributeSource tas = getTransactionAttributeSource();
    final TransactionAttribute txAttr = tas != null ? tas.getTransactionAttribute(method, targetClass) : null;
    final TransactionManager tm = determineTransactionManager(txAttr);
    if (this.reactiveAdapterRegistry != null && tm instanceof ReactiveTransactionManager) {
        ReactiveTransactionSupport txSupport = this.transactionSupportCache.computeIfAbsent(method, key -> {
            Class<?> reactiveType = method.getReturnType();
            ReactiveAdapter adapter = this.reactiveAdapterRegistry.getAdapter(reactiveType);
            if (adapter == null) {
                throw new IllegalStateException("Cannot apply reactive transaction to non-reactive return type: " + method.getReturnType());
            }
            return new ReactiveTransactionSupport(adapter);
        });
        return txSupport.invokeWithinTransaction(method, targetClass, invocation, txAttr, (ReactiveTransactionManager) tm);
    }
    PlatformTransactionManager ptm = asPlatformTransactionManager(tm);
    final String joinpointIdentification = methodIdentification(method, targetClass, txAttr);
    if (txAttr == null || !(ptm instanceof CallbackPreferringPlatformTransactionManager)) {
        // Standard transaction demarcation with getTransaction and commit/rollback calls.
        TransactionInfo txInfo = createTransactionIfNecessary(ptm, txAttr, joinpointIdentification);
        Object retVal;
        try {
            // This is an around advice: Invoke the next interceptor in the chain.
            // This will normally result in a target object being invoked.
            retVal = invocation.proceedWithInvocation();
        } catch (Throwable ex) {
            // target invocation exception
            completeTransactionAfterThrowing(txInfo, ex);
            throw ex;
        } finally {
            cleanupTransactionInfo(txInfo);
        }
        commitTransactionAfterReturning(txInfo);
        return retVal;
    } else {
        Object result;
        ThrowableHolder throwableHolder = new ThrowableHolder();
        // It's a CallbackPreferringPlatformTransactionManager: pass a TransactionCallback in.
        try {
            result = ((CallbackPreferringPlatformTransactionManager) ptm).execute(txAttr, status -> {
                TransactionInfo txInfo = prepareTransactionInfo(ptm, txAttr, joinpointIdentification, status);
                try {
                    return invocation.proceedWithInvocation();
                } catch (Throwable ex) {
                    if (txAttr.rollbackOn(ex)) {
                        // A RuntimeException: will lead to a rollback.
                        if (ex instanceof RuntimeException) {
                            throw (RuntimeException) ex;
                        } else {
                            throw new ThrowableHolderException(ex);
                        }
                    } else {
                        // A normal return value: will lead to a commit.
                        throwableHolder.throwable = ex;
                        return null;
                    }
                } finally {
                    cleanupTransactionInfo(txInfo);
                }
            });
        } catch (ThrowableHolderException ex) {
            throw ex.getCause();
        } catch (TransactionSystemException ex2) {
            if (throwableHolder.throwable != null) {
                log.error("Application exception overridden by commit exception", throwableHolder.throwable);
                ex2.initApplicationException(throwableHolder.throwable);
            }
            throw ex2;
        } catch (Throwable ex2) {
            if (throwableHolder.throwable != null) {
                log.error("Application exception overridden by commit exception", throwableHolder.throwable);
            }
            throw ex2;
        }
        // Check result state: It might indicate a Throwable to rethrow.
        if (throwableHolder.throwable != null) {
            throw throwableHolder.throwable;
        }
        return result;
    }
}

Example 7 with ReactiveAdapter

use of cn.taketoday.core.ReactiveAdapter in project today-infrastructure by TAKETODAY.

the class BodyInserters method writeWithMessageWriters.

private static <M extends ReactiveHttpOutputMessage> Mono<Void> writeWithMessageWriters(M outputMessage, BodyInserter.Context context, Object body, ResolvableType bodyType, @Nullable ReactiveAdapter adapter) {
    Publisher<?> publisher;
    if (body instanceof Publisher) {
        publisher = (Publisher<?>) body;
    } else if (adapter != null) {
        publisher = adapter.toPublisher(body);
    } else {
        publisher = Mono.just(body);
    }
    MediaType mediaType = outputMessage.getHeaders().getContentType();
    return context.messageWriters().stream().filter(messageWriter -> messageWriter.canWrite(bodyType, mediaType)).findFirst().map(BodyInserters::cast).map(writer -> write(publisher, bodyType, mediaType, outputMessage, context, writer)).orElseGet(() -> Mono.error(unsupportedError(bodyType, context, mediaType)));
}

Example 8 with ReactiveAdapter

use of cn.taketoday.core.ReactiveAdapter in project today-infrastructure by TAKETODAY.

the class BodyInserters method fromProducer.

/**
 * Inserter to write the given producer of value(s) which must be a {@link Publisher}
 * or another producer adaptable to a {@code Publisher} via
 * {@link ReactiveAdapterRegistry}.
 * <p>Alternatively, consider using the {@code body} shortcuts on
 * {@link WebClient WebClient} and
 * {@link cn.taketoday.web.reactive.function.server.ServerResponse ServerResponse}.
 *
 * @param <T> the type of the body
 * @param producer the source of body value(s).
 * @param elementTypeRef the type of values to be produced
 * @return the inserter to write a producer
 * @since 4.0
 */
public static <T> BodyInserter<T, ReactiveHttpOutputMessage> fromProducer(T producer, TypeReference<?> elementTypeRef) {
    Assert.notNull(producer, "'producer' must not be null");
    Assert.notNull(elementTypeRef, "'elementTypeRef' must not be null");
    ReactiveAdapter adapter = ReactiveAdapterRegistry.getSharedInstance().getAdapter(producer.getClass());
    Assert.notNull(adapter, "'producer' type is unknown to ReactiveAdapterRegistry");
    return (message, context) -> writeWithMessageWriters(message, context, producer, ResolvableType.fromType(elementTypeRef), adapter);
}