В проекте Spring Batch мне нужно составить запись из нескольких строк. Я реализуюItemReader накапливать несколько строк перед возвратом объекта. Проработав несколько примеров проектов, я сложил это вместе, но столкнулся сReaderNotOpenException.

Я трижды проверил путь к файлу правильно. Когда я отлаживаюdelegate содержит ресурс и путь к файлу из моего файла конфигурации.

Любая помощь приветствуется.

Конфиг файл:

    <bean id="cvsFileItemReader" class="com.mkyong.XYZFileRecordReader">
    <property name="delegate">
        <bean class="org.springframework.batch.item.file.FlatFileItemReader">
            <property name="resource" value="classpath:ma/report-headeronly.psv" />
            <property name="lineMapper">
                <bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
                    <property name="lineTokenizer">
                        <bean
                            class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
                            <property name="delimiter" value="|" />
                        </bean>
                    </property>
                    <property name="fieldSetMapper">
                        <bean class="org.springframework.batch.item.file.mapping.PassThroughFieldSetMapper" />
                    </property>
                </bean>
            </property>
        </bean>
    </property>
</bean>

Мой читатель:

package com.mkyong;

import org.springframework.batch.item.ExecutionContext;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.item.ItemStream;
import org.springframework.batch.item.ItemStreamException;
import org.springframework.batch.item.NonTransientResourceException;
import org.springframework.batch.item.ParseException;
import org.springframework.batch.item.UnexpectedInputException;
import org.springframework.batch.item.file.FlatFileItemReader;
import org.springframework.batch.item.file.transform.FieldSet;

import com.mkyong.model.XYZFileHeaderRecord;

public class XYZFileRecordReader implements ItemReader<XYZFileHeaderRecord>, ItemStream {

private FlatFileItemReader<FieldSet> delegate;

@Override
public XYZFileHeaderRecord read() throws Exception,
        UnexpectedInputException, ParseException,
        NonTransientResourceException {

    XYZFileHeaderRecord maFileHeaderRecord = new XYZFileHeaderRecord();

    for (FieldSet line = null; (line = this.delegate.read()) != null;) {
        String firstToken = line.readString(0);
        if (firstToken.equals("File ID")) {
            maFileHeaderRecord.setFileName( line.readString(1) );
        } else if (firstToken.equals("Date")) {
            maFileHeaderRecord.setDate( line.readString(1) );
            return maFileHeaderRecord;
        }
    }

    return null;
}

@Override
public void close() throws ItemStreamException {}

@Override
public void open(ExecutionContext arg0) throws ItemStreamException {}

@Override
public void update(ExecutionContext arg0) throws ItemStreamException {}

public FlatFileItemReader<FieldSet> getDelegate() {
    return delegate;
}

public void setDelegate(FlatFileItemReader<FieldSet> delegate) {
    this.delegate = delegate;
}
}

И моя трассировка стека:

SEVERE: Encountered an error executing the step
org.springframework.batch.item.ReaderNotOpenException: Reader must be open before it can be read.
    at org.springframework.batch.item.file.FlatFileItemReader.readLine(FlatFileItemReader.java:195)
    at org.springframework.batch.item.file.FlatFileItemReader.doRead(FlatFileItemReader.java:173)
    at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.read(AbstractItemCountingItemStreamItemReader.java:83)
    at com.mkyong.XYZFileRecordReader.read(XYZFileRecordReader.java:26)
    at com.mkyong.XYZFileRecordReader.read(XYZFileRecordReader.java:1)
    at org.springframework.batch.core.step.item.SimpleChunkProvider.doRead(SimpleChunkProvider.java:91)
    at org.springframework.batch.core.step.item.SimpleChunkProvider.read(SimpleChunkProvider.java:155)
    at org.springframework.batch.core.step.item.SimpleChunkProvider$1.doInIteration(SimpleChunkProvider.java:114)
    at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368)
    at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
    at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
    at org.springframework.batch.core.step.item.SimpleChunkProvider.provide(SimpleChunkProvider.java:108)
    at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:69)
    at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:395)
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:131)
    at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:267)
    at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:77)
    at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368)
    at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
    at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
    at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:253)
    at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:195)
    at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:137)
    at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64)
    at org.springframework.batch.core.job.flow.support.state.StepState.handle(StepState.java:60)
    at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:152)
    at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:131)
    at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:135)
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:301)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:134)
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:49)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:127)
    at com.mkyong.App.main(App.java:27)
Apr 25, 2014 5:35:56 PM org.springframework.batch.core.launch.support.SimpleJobLauncher$1 run
INFO: Job: [FlowJob: [name=reportJob]] completed with the following parameters: [{}] and the following status: [FAILED]
Exit Status : FAILED
Done