Spring Batch - Copying file from remote location - spring

Question

I am new to Spring batch. I need to achieve the following:
Step 1: Copy a file from remote location to local directory.
Step 2: Process each line of the file.
Step 3: Store the processed line into a database.
I am sure about the last two steps, but how can I achieve the first step?
Thanks for your help.

Answer 1

you can write a tasklet to achieve this this tasklet would be in separate step
<step id="movingFile" next="step2">
<tasklet ref="voterImportFileMovingTasklet" />
<listeners>
<listener ref="stepLevelListener" />
</listeners>
</step>
<step id="step2" >
<chunk reader="FileReader" processor="ItemProcessor" writer="ItemWriter" commit-interval="300"
skip-limit="1000">
<skippable-exception-classes>
<include class="java.lang.Exception" />
</skippable-exception-classes>
<listeners>
<listener ref="voterImportListener" />
</listeners>
</chunk>
</step>
Tasklet will be
public class FileMovingTasklet implements Tasklet, InitializingBean {
private Resource sourceDirectory;
private Resource targetDirectory;
private static final Log LOG = LogFactory.getLog(FileMovingTasklet.class);
public Resource getSourceDirectory() {
return sourceDirectory;
}
public void setSourceDirectory(Resource sourceDirectory) {
this.sourceDirectory = sourceDirectory;
}
public Resource getTargetDirectory() {
return targetDirectory;
}
public void setTargetDirectory(Resource targetDirectory) {
this.targetDirectory = targetDirectory;
}
#Override
public void afterPropertiesSet() throws Exception {
Assert.notNull(sourceDirectory, "Source directory must be set");
Assert.notNull(targetDirectory, "Target directory must be set");
}
#Override
public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
InputStream inStream = null;
OutputStream outStream = null;
File[] files;
File dir = sourceDirectory.getFile();
Assert.state(dir.isDirectory());
files = dir.listFiles();
File bfile = null;
for (int i = 0; i < files.length; i++) {
bfile = new File(targetDirectory.getURL().getPath() + File.separator + files[i].getName());
inStream = new FileInputStream(files[i]);
outStream = new FileOutputStream(bfile);
byte[] buffer = new byte[1024];
int length;
// copy the file content in bytes
while ((length = inStream.read(buffer)) > 0) {
outStream.write(buffer, 0, length);
}
inStream.close();
outStream.close();
}
return RepeatStatus.FINISHED;
}