I am trying to download files from multiple SFTP servers then handle those files. But I can not get the information of remote SFTP server such as: IpAddress, remoteDirectory depending on which file MessageHandler handling. Instead Payload only contains the information of the dowloaded files at local. Here the source code I use from the guide: How to dynamically define file filter pattern for Spring Integration SFTP Inbound Adapter?
SFTIntegration.java
import com.jcraft.jsch.ChannelSftp.LsEntry;
import java.io.File;
import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.channel.NullChannel;
import org.springframework.integration.dsl.IntegrationFlow;
import org.springframework.integration.dsl.IntegrationFlows;
import org.springframework.integration.dsl.Pollers;
import org.springframework.integration.dsl.SourcePollingChannelAdapterSpec;
import org.springframework.integration.expression.FunctionExpression;
import org.springframework.integration.file.remote.aop.RotatingServerAdvice;
import org.springframework.integration.file.remote.session.DelegatingSessionFactory;
import org.springframework.integration.file.remote.session.SessionFactory;
import org.springframework.integration.scheduling.PollerMetadata;
import org.springframework.integration.sftp.dsl.Sftp;
import org.springframework.integration.sftp.dsl.SftpInboundChannelAdapterSpec;
import org.springframework.integration.sftp.session.DefaultSftpSessionFactory;
import org.springframework.messaging.MessageChannel;
import org.springframework.stereotype.Component;
/**
* flow.
*/
@Configuration
@Component
public class SFTIntegration {
public static final String TIMEZONE_UTC = "UTC";
public static final String TIMESTAMP_FORMAT_OF_FILES = "yyyyMMddHHmmssSSS";
public static final String TEMPORARY_FILE_SUFFIX = ".part";
public static final int POLLER_FIXED_PERIOD_DELAY = 60000;
public static final int MAX_MESSAGES_PER_POLL = 100;
private static final Logger LOG = LoggerFactory.getLogger(SFTIntegration.class);
private static final String CHANNEL_INTERMEDIATE_STAGE = "intermediateChannel";
@Autowired
private ImportHandler importHandler;
/** database access repository */
private final SFTPServerConfigRepo SFTPServerConfigRepo;
@Value("${sftp.local.directory.download:${java.io.tmpdir}/localDownload}")
private String localTemporaryPath;
public SFTIntegration(final SFTPServerConfigRepo SFTPServerConfigRepo) {
this.SFTPServerConfigRepo = SFTPServerConfigRepo;
}
/**
* The default poller with 5s, 100 messages, RotatingServerAdvice and transaction.
*
* @return default poller.
*/
@Bean(name = PollerMetadata.DEFAULT_POLLER)
public PollerMetadata poller() {
return Pollers
.fixedDelay(POLLER_FIXED_PERIOD_DELAY)
.advice(advice())
.maxMessagesPerPoll(MAX_MESSAGES_PER_POLL)
.transactional()
.get();
}
/**
* The direct channel for the flow.
*
* @return MessageChannel
*/
@Bean
public MessageChannel stockIntermediateChannel() {
return new DirectChannel();
}
/**
* Get the files from a remote directory. Add a timestamp to the filename
* and write them to a local temporary folder.
*
* @return IntegrationFlow
*/
@Bean
public IntegrationFlow collectionInboundFlowFromSFTPServer() {
// Source definition
final SftpInboundChannelAdapterSpec sourceSpec = Sftp.inboundAdapter(delegatingSFtpSessionFactory())
.preserveTimestamp(true)
.patternFilter("*.*")
.deleteRemoteFiles(true)
.maxFetchSize(MAX_MESSAGES_PER_POLL)
.remoteDirectory("/")
.localDirectory(new File(localTemporaryPath))
.temporaryFileSuffix(TEMPORARY_FILE_SUFFIX)
.localFilenameExpression(new FunctionExpression<String>(s -> {
final int fileTypeSepPos = s.lastIndexOf('.');
return
DateTimeFormatter
.ofPattern(TIMESTAMP_FORMAT_OF_FILES)
.withZone(ZoneId.of(TIMEZONE_UTC))
.format(Instant.now())
+ "_"
+ s.substring(0, fileTypeSepPos)
+ s.substring(fileTypeSepPos);
}));
// Poller definition
final Consumer<SourcePollingChannelAdapterSpec> collectionInboundPoller = endpointConfigurer -> endpointConfigurer
.id("collectionInboundPoller")
.autoStartup(true)
.poller(poller());
return IntegrationFlows
.from(sourceSpec, collectionInboundPoller)
.transform(File.class, p -> {
// log step
LOG.info("flow=collectionInboundFlowFromSFTPServer, message=incoming file: " + p);
return p;
})
.channel(CHANNEL_INTERMEDIATE_STAGE)
.get();
}
@Bean
public IntegrationFlow collectionIntermediateStageChannel() {
return IntegrationFlows
.from(CHANNEL_INTERMEDIATE_STAGE)
.handle(importHandler)
.channel(new NullChannel())
.get();
}
public DefaultSftpSessionFactory createNewSftpSessionFactory(final SFTPServerConfig pc) {
final DefaultSftpSessionFactory factory = new DefaultSftpSessionFactory(
false);
factory.setHost(pc.getServerIp());
factory.setPort(pc.getPort());
factory.setUser(pc.getUsername());
factory.setPassword(pc.getPassword());
factory.setAllowUnknownKeys(true);
return factory;
}
@Bean
public DelegatingSessionFactory<LsEntry> delegatingSFtpSessionFactory() {
final List<SFTPServerConfig> partnerConnections = SFTPServerConfigRepo.findAll();
if (partnerConnections.isEmpty()) {
return null;
}
final Map<Object, SessionFactory<LsEntry>> factories = new LinkedHashMap<>(10);
for (SFTPServerConfig pc : partnerConnections) {
// create a factory for every key containing server type, url and port
if (factories.get(pc.getKey()) == null) {
factories.put(pc.getKey(), createNewSftpSessionFactory(pc));
}
}
// use the first SF as the default
return new DelegatingSessionFactory<>(factories, factories.values().iterator().next());
}
@Bean
public RotatingServerAdvice advice() {
final List<SFTPServerConfig> sftpConnections = SFTPServerConfigRepo.findAll();
final List<RotatingServerAdvice.KeyDirectory> keyDirectories = new ArrayList<>();
for (SFTPServerConfig pc : sftpConnections) {
keyDirectories
.add(new RotatingServerAdvice.KeyDirectory(pc.getKey(), pc.getServerPath()));
}
return new RotatingServerAdvice(delegatingSFtpSessionFactory(), keyDirectories, true);
}
}
ImportHandler.java
import org.springframework.messaging.Message;
import org.springframework.stereotype.Service;
@Service
public class ImportHandler {
public void handle(Message<?> message) {
System.out.println("Hello " + message);
System.out.println(message.getPayload());
System.out.println(message.getHeaders());
//How can I get the information of remote server Ip address, remoteDirectory here where the file comes from
}
}
If you have any ideas, please let me know. Thank you so much!.
