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.

            exchange.setProperty(Exchange.ERRORHANDLER_HANDLED, Boolean.FALSE);
            exchange.setException(exchange.getProperty(Exchange.EXCEPTION_CAUGHT, Exception.class));
            // and put failure endpoint back as well
            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());
            }
        }
    }

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        }


        if (exchange.getUnitOfWork() == null) {
            // If there is no existing UoW, then we should start one and
            // terminate it once processing is completed for the exchange.
            final UnitOfWork uow = createUnitOfWork(exchange);
            exchange.setUnitOfWork(uow);
            try {
                uow.start();
            } catch (Exception e) {
                callback.done(true);
                exchange.setException(e);
                return true;
            }

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

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                exchange.setException(e);
            }
            callback.done(true);
            sync = true;
        } else {
            final UnitOfWork uow = exchange.getUnitOfWork();


            // allow unit of work to wrap callback in case it need to do some special work
            // for example the MDCUnitOfWork
            AsyncCallback async = callback;
            if (uow != null) {
                async = uow.beforeProcess(processor, exchange, callback);
            }


            // we support asynchronous routing so invoke it
            sync = processor.process(exchange, async);


            // execute any after processor work (in current thread, not in the callback)
            if (uow != null) {
                uow.afterProcess(processor, exchange, callback, sync);
            }
        }


        if (LOG.isTraceEnabled()) {
            LOG.trace("Exchange processed and is continued routed {} for exchangeId: {} -> {}",

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        }


        if (exchange.getUnitOfWork() == null) {
            // If there is no existing UoW, then we should start one and
            // terminate it once processing is completed for the exchange.
            final UnitOfWork uow = createUnitOfWork(exchange);
            exchange.setUnitOfWork(uow);
            try {
                uow.start();
            } catch (Exception e) {
                callback.done(true);
                exchange.setException(e);
                return true;
            }

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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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        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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     * @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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        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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