Examples of org.apache.camel.spi.UnitOfWork

org.apache.camel.spi.UnitOfWork
An object representing the unit of work processing an {@link Exchange}which allows the use of {@link Synchronization} hooks. This object might map one-to-one witha transaction in JPA or Spring; or might not.

        if (exhausted) {
            Processor target = null;
            boolean deliver = true;


            // the unit of work may have an optional callback associated we need to leverage
            UnitOfWork uow = exchange.getUnitOfWork();
            if (uow != null) {
                SubUnitOfWorkCallback uowCallback = uow.getSubUnitOfWorkCallback();
                if (uowCallback != null) {
                    // signal to the callback we are exhausted
                    uowCallback.onExhausted(exchange);
                    // do not deliver to the failure processor as its been handled by the callback instead
                    deliver = false;

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            data.retryWhilePredicate = exceptionPolicy.getRetryWhilePolicy();
            data.useOriginalInMessage = exceptionPolicy.isUseOriginalMessage();


            // route specific failure handler?
            Processor processor = null;
            UnitOfWork uow = exchange.getUnitOfWork();
            if (uow != null && uow.getRouteContext() != null) {
                String routeId = uow.getRouteContext().getRoute().getId();
                processor = exceptionPolicy.getErrorHandler(routeId);
            } else if (!exceptionPolicy.getErrorHandlers().isEmpty()) {
                // note this should really not happen, but we have this code as a fail safe
                // to be backwards compatible with the old behavior
                log.warn("Cannot determine current route from Exchange with id: {}, will fallback and use first error handler.", exchange.getExchangeId());

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            log.trace("Failure processor {} is processing Exchange: {}", processor, exchange);


            // store the last to endpoint as the failure endpoint
            exchange.setProperty(Exchange.FAILURE_ENDPOINT, exchange.getProperty(Exchange.TO_ENDPOINT));
            // and store the route id so we know in which route we failed
            UnitOfWork uow = exchange.getUnitOfWork();
            if (uow != null && uow.getRouteContext() != null) {
                exchange.setProperty(Exchange.FAILURE_ROUTE_ID, uow.getRouteContext().getRoute().getId());
            }


            // the failure processor could also be asynchronous
            AsyncProcessor afp = AsyncProcessorConverterHelper.convert(processor);
            sync = afp.process(exchange, new AsyncCallback() {

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    public static Exchange createCorrelatedCopy(Exchange exchange, boolean handover) {
        Exchange copy = exchange.copy();
        // do not share the unit of work
        copy.setUnitOfWork(null);
        // hand over on completion to the copy if we got any
        UnitOfWork uow = exchange.getUnitOfWork();
        if (handover && uow != null) {
            uow.handoverSynchronization(copy);
        }
        // set a correlation id so we can track back the original exchange
        copy.setProperty(Exchange.CORRELATION_ID, exchange.getExchangeId());
        return copy;
    }

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        context.getProperties().put(CachedOutputStream.THRESHOLD, "16");
        deleteDirectory("./target/cachedir");
        createDirectory("./target/cachedir");


        exchange = new DefaultExchange(context);
        UnitOfWork uow = new DefaultUnitOfWork(exchange);
        exchange.setUnitOfWork(uow);
    }

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        Exchange copy = exchange.copy();
        // do not share the unit of work
        copy.setUnitOfWork(null);
        // hand over on completion to the copy if we got any
        UnitOfWork uow = exchange.getUnitOfWork();
        if (handover && uow != null) {
            uow.handoverSynchronization(copy);
        }
        // set a correlation id so we can track back the original exchange
        copy.setProperty(Exchange.CORRELATION_ID, id);
        return copy;
    }

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    public boolean isFailed() {
        return (hasOut() && getOut().isFault()) || getException() != null;
    }


    public boolean isTransacted() {
        UnitOfWork uow = getUnitOfWork();
        if (uow != null) {
            return uow.isTransacted();
        } else {
            return false;
        }
    }

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        this.parent = parentUnitOfWork;
    }


    public UnitOfWork createChildUnitOfWork(Exchange childExchange) {
        // create a new child unit of work, and mark me as its parent
        UnitOfWork answer = newInstance(childExchange);
        answer.setParentUnitOfWork(this);
        return answer;
    }

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     * @param processor the processor wrapped in this unit of work processor
     * @param exchange  the exchange
     * @return the unit of work processor
     */
    protected UnitOfWorkProcessor createUnitOfWorkProcessor(Processor processor, Exchange exchange) {
        UnitOfWork parent = exchange.getProperty(Exchange.PARENT_UNIT_OF_WORK, UnitOfWork.class);
        if (parent != null) {
            return new ChildUnitOfWorkProcessor(parent, processor);
        } else {
            return new UnitOfWorkProcessor(processor);
        }

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     *
     * @param exchange the exchange
     * @return the created unit of work
     */
    protected UnitOfWork createUnitOfWork(Exchange exchange) {
        UnitOfWork answer;
        if (exchange.getContext().isUseMDCLogging()) {
            answer = new MDCUnitOfWork(exchange);
        } else {
            answer = new DefaultUnitOfWork(exchange);
        }

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