Example usage for org.springframework.batch.item.file FlatFileItemWriter setLineAggregator

Introduction

In this page you can find the example usage for org.springframework.batch.item.file FlatFileItemWriter setLineAggregator.

Prototype

public void setLineAggregator(LineAggregator<T> lineAggregator) 

Source Link

Document

Public setter for the LineAggregator .

Usage

From source file:org.jboss.examples.spring.batch.BatchConfiguration.java

@Bean
public FlatFileItemWriter<AggregateItem<Trade>> writer() {
    FlatFileItemWriter rc = new FlatFileItemWriter();
    rc.setLineAggregator(new PassThroughLineAggregator());
    rc.setResource(new FileSystemResource("./target/multistep.txt"));
    return rc;/*from   w  ww. j a v a  2  s . c  o  m*/
}

---

From source file:de.codecentric.batch.jobs.FlatFileJobConfiguration.java

@Bean
public ItemWriter<String> writer() {
    FlatFileItemWriter<String> writer = new FlatFileItemWriter<String>();
    writer.setResource(new FileSystemResource(new File("target/out-javaconfig.txt")));
    writer.setLineAggregator(new PassThroughLineAggregator<String>());
    return writer;
}

---

From source file:org.cbio.portal.pipelines.foundation.MetaDataTasklet.java

/**
 * Create and Write meta data file./* w  w w. j  a v a 2  s .  c om*/
 * @param executionContext
 * @throws Exception 
 */
private void writeMetaStagingFile(ExecutionContext executionContext, String metaFilename, List<String> metaData)
        throws Exception {
    FlatFileItemWriter<String> flatFileItemWriter = new FlatFileItemWriter<>();
    PassThroughLineAggregator aggr = new PassThroughLineAggregator();

    try {
        flatFileItemWriter.setLineAggregator(aggr);
        flatFileItemWriter.setResource(new FileSystemResource(metaFilename));
        flatFileItemWriter.open(executionContext);
        flatFileItemWriter.write(metaData);
        flatFileItemWriter.close();
    } catch (Exception ex) {
        LOG.error("Error writing meta data file: " + metaFilename);
        ex.printStackTrace();
    }

}

---

From source file:org.springframework.batch.admin.sample.LeadRandomizer.java

@Test
public void testLeads() throws Exception {

    FlatFileItemReader<FieldSet> reader = new FlatFileItemReader<FieldSet>();
    reader.setResource(new ClassPathResource("/data/test.txt"));
    DefaultLineMapper<FieldSet> lineMapper = new DefaultLineMapper<FieldSet>();
    lineMapper.setLineTokenizer(new DelimitedLineTokenizer());
    lineMapper.setFieldSetMapper(new PassThroughFieldSetMapper());
    reader.setLinesToSkip(1);/* ww w .  j  a  v  a2  s .  c  o  m*/
    final List<String> headers = new ArrayList<String>();
    reader.setSkippedLinesCallback(new LineCallbackHandler() {
        public void handleLine(String line) {
            headers.add(line);
        }
    });
    reader.setLineMapper(lineMapper);
    reader.open(new ExecutionContext());

    List<FieldSet> list = new ArrayList<FieldSet>();
    FieldSet item = reader.read();
    while (item != null) {
        list.add(item);
        item = reader.read();
    }
    assertEquals(7, list.size());

    FlatFileItemWriter<FieldSet> writer = new FlatFileItemWriter<FieldSet>();
    FileSystemResource resource = new FileSystemResource("target/output/output.txt");
    FileUtils.deleteQuietly(resource.getFile());
    writer.setResource(resource);
    writer.setHeaderCallback(new FlatFileHeaderCallback() {
        public void writeHeader(Writer writer) throws IOException {
            for (String header : headers) {
                writer.write(header);
            }
        }
    });
    writer.setLineAggregator(new DelimitedLineAggregator<FieldSet>());
    writer.open(new ExecutionContext());

    String[] names = getFields(list, 1);
    String[] country = getFields(list, 2);
    String[] products = getFields(list, 3);
    double[] amounts = getMinMax(list, 4);

    NumberFormat formatter = new DecimalFormat("#.##");
    int count = 20;
    for (int i = 0; i < 100; i++) {
        List<FieldSet> items = new ArrayList<FieldSet>();
        for (FieldSet fieldSet : list) {
            String[] values = fieldSet.getValues();
            values[0] = "" + (count++);
            values[1] = choose(names);
            values[2] = choose(country);
            values[3] = choose(products);
            values[4] = formatter.format(random(amounts));
            items.add(new DefaultFieldSet(values));
        }
        writer.write(items);
    }
    writer.close();

}

---