DeleteFilesTasklet with filename pattern property

[elster]

Hi,

I would like to implement a tasklet deleting files matching a certain pattern in 'MultiResourceReader' style. What is the best approach to teach the tasklet class to evaluate the bean property the same way as MultiResourceReader (or its calling class) does?

I think about the following bean definition:

	<bean id="deleteFilesTasklet" class="com.siemens.ces.sdsync.DeleteFileTasklet"
		scope="step">
		<property name="resources" value="#{jobParameters['inputFileNamePattern']}"/>
	</bean>

public class DeleteFileTasklet implements Tasklet, InitializingBean {

	private Resource[] resources;

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

		for (int i = 0; i < resources.length; i++) {
			File file = resources[i].getFile();
			Assert.state(file.isFile());
			boolean deleted = file.delete();
			if (!deleted) {
				throw new UnexpectedJobExecutionException(
						"Could not delete file " + file.getName());
			}
		}
		return RepeatStatus.FINISHED;
	}

	public void setResources(Resource resources[]) {
		Assert.notNull(resources, "The resources must not be null");
		this.resources = (Resource[]) Arrays.asList(resources).toArray(
				new Resource[resources.length]);
	}

	public void afterPropertiesSet() throws Exception {
		Assert.notNull(resources, "files must be set");
	}
}

Thanks in advance for your help,
Elmar

[elster]

Hi guys,

PathMatchingResourcePatternResolver does the trick:

Code:
<bean id="deleteFilesTasklet" class="com.siemens.ces.sdsync.DeleteFilesTasklet"
scope="step">
<property name="resources" value="#{jobParameters['inputFileNamePattern']}" />
</bean>

<bean id="resourcePatternResolver" class="org.springframework.core.io.support.PathMat chingResourcePatternResolver" />

Code:
public class DeleteFilesTasklet implements Tasklet, InitializingBean {

private String resourcePattern;

@Autowired
private ResourcePatternResolver resourcePatternResolver;

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

Resource[] resources = resourcePatternResolver.getResources(resourcePatte rn);
for (Resource resource : resources) {
File file = resource.getFile();
Assert.state(file.isFile());
boolean deleted = file.delete();
if (!deleted) {
throw new UnexpectedJobExecutionException(
"Could not delete file " + file.getName());
}
}
return RepeatStatus.FINISHED;
}

public void setResources(String resources) {
Assert.notNull(resources, "The resources must not be null");
this.resourcePattern = resources;
}

public void setResourcePatternResolver(ResourcePatternResolver resourcePatternResolver) {
this.resourcePatternResolver = resourcePatternResolver;
}

public void afterPropertiesSet() throws Exception {
Assert.notNull(resourcePattern, "files must be set");
}
}

[elster]

Hi guys,

PathMatchingResourcePatternResolver does the trick:

Code:
<bean id="deleteFilesTasklet" class="com.siemens.ces.sdsync.DeleteFilesTasklet"
scope="step">
<property name="resources" value="#{jobParameters['inputFileNamePattern']}" />
</bean>

<bean id="resourcePatternResolver" class="org.springframework.core.io.support.PathMat chingResourcePatternResolver" />

Code:
public class DeleteFilesTasklet implements Tasklet, InitializingBean {

private String resourcePattern;

@Autowired
private ResourcePatternResolver resourcePatternResolver;

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

Resource[] resources = resourcePatternResolver.getResources(resourcePatte rn);
for (Resource resource : resources) {
File file = resource.getFile();
Assert.state(file.isFile());
boolean deleted = file.delete();
if (!deleted) {
throw new UnexpectedJobExecutionException(
"Could not delete file " + file.getName());
}
}
return RepeatStatus.FINISHED;
}

public void setResources(String resources) {
Assert.notNull(resources, "The resources must not be null");
this.resourcePattern = resources;
}

public void setResourcePatternResolver(ResourcePatternResolver resourcePatternResolver) {
this.resourcePatternResolver = resourcePatternResolver;
}

public void afterPropertiesSet() throws Exception {
Assert.notNull(resourcePattern, "files must be set");
}
}