Misunderstanding with JobLaunchRequest - spring-integration

Question

this is my previous question: Spring Integration + Spring Batch: the job doesn`t stop.
Project works good with annotation configuration, but I want the same on xml config :)
xml configuration:
<int:service-activator input-channel="fileInputChannel"
method="fileWritingMessageHandler"
output-channel="jobLaunchRequestChannel">
<bean class="service.impl.IntegrationServiceImpl"/>
</int:service-activator>
<int:service-activator input-channel="jobLaunchRequestChannel"
method="jobLaunchRequest"
output-channel="jobLaunchingGatewayChannel">
<bean class="service.impl.IntegrationServiceImpl"/>
</int:service-activator>
<batch-int:job-launching-gateway request-channel="jobLaunchingGatewayChannel"
reply-channel="finish"/>
<int:service-activator input-channel="finish"
ref="integrationServiceImpl"
method="finishJob">
</int:service-activator>
IntegrationConfiguration.java:
#Bean
public FtpInboundFileSynchronizer ftpInboundFileSynchronizer() {
FtpInboundFileSynchronizer fileSynchronizer = new FtpInboundFileSynchronizer(defaultFtpSessionFactory);
fileSynchronizer.setRemoteDirectory(remoteDirectory);
fileSynchronizer.setDeleteRemoteFiles(false);
return fileSynchronizer;
}
#Bean
#InboundChannelAdapter(channel = "fileInputChannel", poller = #Poller(cron = "*/5 * * * * ?"))
public FtpInboundFileSynchronizingMessageSource ftpInboundFileSynchronizingMessageSource(FtpInboundFileSynchronizer fileSynchronizer) throws Exception {
FtpInboundFileSynchronizingMessageSource messageSource = new FtpInboundFileSynchronizingMessageSource(fileSynchronizer);
messageSource.setAutoCreateLocalDirectory(true);
messageSource.setLocalDirectory(new File(localDirectory));
messageSource.setLocalFilter(new AcceptOnceFileListFilter<>());
return messageSource;
}
IntegrationServiceImpl:
#Override
public FileWritingMessageHandler fileWritingMessageHandler() {
FileWritingMessageHandler messageHandler = new FileWritingMessageHandler(new File(storageDirectory));
messageHandler.setDeleteSourceFiles(true);
messageHandler.setFileNameGenerator(message -> {
Long timestamp = new Date().getTime();
log.info(timestamp);
return "test_" + timestamp;
});
return messageHandler;
}
#Override
public JobLaunchRequest jobLaunchRequest(File file) throws IOException {
// public JobLaunchRequest jobLaunchRequest(FileWritingMessageHandler fileWritingMessageHandler) throws IOException {
String[] content = FileUtils.readFileToString(file, "UTF-8").split("\\s+");
JobParameters jobParameters = new JobParametersBuilder()
.addString("filename", file.getAbsolutePath())
.addString("id", content[0])
.addString("salary", content[1])
.toJobParameters();
log.info(jobParameters);
return new JobLaunchRequest(increaseSalaryJob, jobParameters);
}
#Override
public void finishJob() {
log.info("Job finished");
}
As you can see this xml config like previous post annotation config, BUT i have an error:
Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1004E: Method call: Method jobLaunchRequest(org.springframework.integration.file.FileWritingMessageHandler) cannot be found on type service.impl.IntegrationServiceImpl
Why i can't use jobLaunchRequest(File)? And if i need to use jobLaunchRequest(FileWritingMessageHandler) how can I operate with file?

Answer 1

The jobLaunchRequest() method definitely has to be with a File argument because that is indeed what produced as a payload in the reply message from the FileWritingMessageHandler.
Your <int:service-activator input-channel="fileInputChannel"
method="fileWritingMessageHandler"> definition is wrong.
Since you would like to use a FileWritingMessageHandler as a service, you need to consider to use an <int-file:outbound-gateway> instead.
The service-activator is for calling POJO methods. Since FileWritingMessageHandler is a MessageHandler implementation it has to be used in the <service-activator> directly from the ref attribute without any method attribute usage.