Exception handling

@Component
public class CommonItemReadListener implements ItemReadListener<Object> {

    private static final Logger logger =
            LoggerFactory.getLogger(CommonItemReadListener.class);

    // omitted.

    // (1)
    @Override
    public void onReadError(Exception ex) {
        logger.error("Exception occurred while reading.", ex);  // (2)
    }

    // omitted.
}

@Component
public class AmountCheckProcessor implements
        ItemProcessor<SalesPerformanceDetail, SalesPerformanceDetail> {

    // omitted.

    @Override
    public SalesPerformanceDetail process(SalesPerformanceDetail item)
            throws Exception {
        // (1)
        try {
            checkAmount(item.getAmount(), amountLimit);
        } catch (ArithmeticException ae) {
            // (2)
            logger.error(
                "Exception occurred while processing. [item:{}]", item, ae);
            // (3)
            throw new IllegalStateException("check error at processor.", ae);
        }
        return item;
    }
}

@Component
public class CommonItemProcessListener implements ItemProcessListener<Object, Object> {

    private static final Logger logger =
            LoggerFactory.getLogger(CommonItemProcessListener.class);

    // omitted.

    // (1)
    @Override
    public void onProcessError(Object item, Exception e) {
        // (2)
        logger.error("Exception occurred while processing. [item:{}]", item, e);
    }

    // omitted.
}

@Component
public class CommonItemWriteListener implements ItemWriteListener<Object> {

    private static final Logger logger =
            LoggerFactory.getLogger(CommonItemWriteListener.class);

    // omitted.

    // (1)
    @Override
    public void onWriteError(Exception ex, List item) {
        // (2)
        logger.error("Exception occurred while processing. [items:{}]", item, ex);
    }

    // omitted.
}

<bean id="detailCSVReader"
      class="org.springframework.batch.item.file.FlatFileItemReader" scope="step">
    <property name="resource" value="file:#{jobParameters['inputFile']}"/>
    <property name="lineMapper">
        <bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
            <property name="lineTokenizer">
                <bean class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer"
                      p:names="branchId,year,month,customerId,amount"/>
            </property>
            <property name="fieldSetMapper">
                <bean class="org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper"
                      p:targetType="org.terasoluna.batch.functionaltest.app.model.performance.SalesPerformanceDetail"/>
            </property>
        </bean>
    </property>
</bean>

<!-- (1) -->
<bean id="skipPolicy"
      class="org.springframework.batch.core.step.skip.AlwaysSkipItemSkipPolicy"/>

<batch:job id="jobSalesPerfAtSkipAllReadError" job-repository="jobRepository">
    <batch:step id="jobSalesPerfAtSkipAllReadError.step01">
        <batch:tasklet transaction-manager="jobTransactionManager">
            <batch:chunk reader="detailCSVReader"
                         processor="amountCheckProcessor"
                         writer="detailWriter" commit-interval="10"
                         skip-policy="skipPolicy"> <!-- (2) -->
            </batch:chunk>
        </batch:tasklet>
    </batch:step>
</batch:job>

<!-- (1) -->
<bean id="skipPolicy"
      class="org.springframework.batch.core.step.skip.NeverSkipItemSkipPolicy"/>

<batch:job id="jobSalesPerfAtSkipNeverReadError" job-repository="jobRepository">
    <batch:step id="jobSalesPerfAtSkipNeverReadError.step01">
        <batch:tasklet transaction-manager="jobTransactionManager">
            <batch:chunk reader="detailCSVReader"
                         processor="amountCheckProcessor"
                         writer="detailWriter" commit-interval="10"
                         skip-policy="skipPolicy"> <!-- (2) -->
            </batch:chunk>
        </batch:tasklet>
    </batch:step>
</batch:job>

(1)
<!--
<bean id="skipPolicy"
      class="org.springframework.batch.core.step.skip.LimitCheckingItemSkipPolicy"/>
-->

<batch:job id="jobSalesPerfAtValidSkipReadError" job-repository="jobRepository">
    <batch:step id="jobSalesPerfAtValidSkipReadError.step01">
        <batch:tasklet transaction-manager="jobTransactionManager">
            <batch:chunk reader="detailCSVReader"
                         processor="amountCheckProcessor"
                         writer="detailWriter" commit-interval="10"
                         skip-limit="2">  <!-- (2) -->
                <!-- (3) -->
                <batch:skippable-exception-classes>
                    <!-- (4) -->
                    <batch:include
                        class="org.springframework.batch.item.ItemReaderException"/>
                </batch:skippable-exception-classes>
            </batch:chunk>
        </batch:tasklet>
    </batch:step>
</batch:job>

<!-- (1) -->
<bean id="skipPolicy"
      class="org.springframework.batch.core.step.skip.ExceptionClassifierSkipPolicy">
    <property name="policyMap">
        <map>
            <!-- (2) -->
            <entry key="org.springframework.batch.item.ItemReaderException"
                   value-ref="alwaysSkip"/>
        </map>
    </property>
</bean>
<!-- (3) -->
<bean id="alwaysSkip"
      class="org.springframework.batch.core.step.skip.AlwaysSkipItemSkipPolicy"/>

<batch:job id="jobSalesPerfAtValidNolimitSkipReadError"
           job-repository="jobRepository">
    <batch:step id="jobSalesPerfAtValidNolimitSkipReadError.step01">
        <batch:tasklet transaction-manager="jobTransactionManager">
            <!-- skip-limit value is dummy. -->
            <batch:chunk reader="detailCSVReader"
                         processor="amountCheckProcessor"
                         writer="detailWriter" commit-interval="10"
                         skip-policy="skipPolicy"> <!-- (4) -->
            </batch:chunk>
        </batch:tasklet>
    </batch:step>
</batch:job>

@Component
public class AmountCheckProcessor implements
        ItemProcessor<SalesPerformanceDetail, SalesPerformanceDetail> {

    // omitted.

    @Override
    public SalesPerformanceDetail process(SalesPerformanceDetail item) throws Exception {
        // (1)
        try {
            checkAmount(item.getAmount(), amountLimit);
        } catch (ArithmeticException ae) {
            logger.warn("Exception occurred while processing. Skipped. [item:{}]",
                    item, ae); // (2)
            return null; // (3)
        }
        return item;
    }
}

@Component
public class SalesPerformanceTasklet implements Tasklet {

    private static final Logger logger =
            LoggerFactory.getLogger(SalesPerformanceTasklet.class);

    // omitted.

    @Override
    public RepeatStatus execute(StepContribution contribution,
            ChunkContext chunkContext) throws Exception {

        // (1)
        try {
            reader.open(chunkContext.getStepContext().getStepExecution()
                    .getExecutionContext());

            List<SalesPerformanceDetail> items = new ArrayList<>(10);
            SalesPerformanceDetail item = null;
            do {
                // Pseudo operation of ItemReader
                // omitted.

                // Pseudo operation of ItemProcessor
                checkAmount(item.getAmount(), amountLimit);


                // Pseudo operation of ItemWriter
                // omitted.

            } while (item != null);
        } catch (Exception e) {
            logger.warn("exception in tasklet. Skipped.", e);   // (2)
            continue;    // (3)
        } finally {
            try {
                reader.close();
            } catch (Exception e) {
                // do nothing.
            }
        }

        return RepeatStatus.FINISHED;
    }
}