Examples of org.apache.camel.spi.SubUnitOfWorkCallback

org.apache.camel.spi.SubUnitOfWorkCallback
To allow unit of work for the {@link UnitOfWork} while processing a number of {@link Exchange}s.
A sub unit of work is a way of implement sub-transactions in Camel routing. This is needed by some EIPs where you can have sub routes such as the Splitter. The Camel end user may want to indicate that the Splitter should act as a single combined unit of work.
To implement this, we use this {@link SubUnitOfWorkCallback}which allows us to have the sub routes participate in a {@link SubUnitOfWork}And then the outcome of the {@link SubUnitOfWork} will be a single atomic commit or rollback.
When using a {@link SubUnitOfWork} we need to tap into the sub routes, and ensure they callback with the progressof the sub {@link Exchange} being processed. For example the error handler, we need to tap into, andensure that any exhausted sub {@link Exchange} is propagated into the result of the {@link SubUnitOfWork}. This {@link SubUnitOfWorkCallback} allows us to do that. @see SubUnitOfWork

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


                // the unit of work may have an optional callback associated we need to leverage
                SubUnitOfWorkCallback uowCallback = exchange.getUnitOfWork().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;
                }


                if (deliver) {

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


                // the unit of work may have an optional callback associated we need to leverage
                SubUnitOfWorkCallback uowCallback = exchange.getUnitOfWork().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;
                }


                if (deliver) {

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


            // the unit of work may have an optional callback associated we need to leverage
            SubUnitOfWorkCallback uowCallback = exchange.getUnitOfWork().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;
            }


            if (deliver) {

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        // at first done the synchronizations
        UnitOfWorkHelper.doneSynchronizations(exchange, synchronizations, log);


        // notify uow callback if in use
        try {
            SubUnitOfWorkCallback uowCallback = getSubUnitOfWorkCallback();
            if (uowCallback != null) {
                uowCallback.onDone(exchange);
            }
        } catch (Throwable e) {
            // must catch exceptions to ensure synchronizations is also invoked
            log.warn("Exception occurred during savepoint onDone. This exception will be ignored.", e);
        }

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


                // the unit of work may have an optional callback associated we need to leverage
                SubUnitOfWorkCallback uowCallback = exchange.getUnitOfWork().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;
                }


                if (deliver) {

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


            // the unit of work may have an optional callback associated we need to leverage
            SubUnitOfWorkCallback uowCallback = exchange.getUnitOfWork().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;
            }


            if (deliver) {

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


                // the unit of work may have an optional callback associated we need to leverage
                SubUnitOfWorkCallback uowCallback = exchange.getUnitOfWork().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;
                }


                if (deliver) {

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


            // the unit of work may have an optional callback associated we need to leverage
            SubUnitOfWorkCallback uowCallback = exchange.getUnitOfWork().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;
            }


            if (deliver) {

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


                // the unit of work may have an optional callback associated we need to leverage
                SubUnitOfWorkCallback uowCallback = exchange.getUnitOfWork().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;
                }


                if (deliver) {

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Related Classes of org.apache.camel.spi.SubUnitOfWorkCallback

org.apache.camel.impl.DefaultUnitOfWork

org.apache.camel.processor.RedeliveryErrorHandler

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