how to define multiple sftp connections?

问题

I'm trying to use the outbound gateway to download files from multiple sftp servers, the number of sftp server is configured in properties(which means that i need to define the connection dynamically), my application.properties:

sftp.host=host1,host2
sftp.user=user1,user2
sftp.pwd=pwd1,pwd2

current I use the java config as:

@Configuration

public class SFtpConfig {

static  Logger logger = LoggerFactory.getLogger(SFtpConfig.class);

@Autowired
SftpServerProperties sftpServerProperties;

@Autowired
SftpClientProperties sftpClientProperties;

@Bean
public SessionFactory<ChannelSftp.LsEntry> sftpSessionFactory() {

 ...
}

@Bean(name = "myGateway")
@ServiceActivator(inputChannel = "sftpChannel")
public MessageHandler handlerLs() {

 ...
}

@MessagingGateway
public interface DownloadGateway {
    @Gateway(requestChannel = "sftpChannel")
    List<File> start(String dir);
}

@Bean(name="sftpChannel")
public MessageChannel sftpChannel() {
    return new DirectChannel();
}

}

but this config is only for connect to one sftp server, so how can i define multiple sftp connections using the application.properties config? I mean dynamic number of sessionFactory/handler/gateway/channer (some of the bean has annotation, how to dynamic define such kind of bean?)

回答1:

You should consider to declare children ApplicationContext with the same content but different properties for ConnectionFactories:

/**
 * Set the parent of this application context.
 * <p>Note that the parent shouldn't be changed: It should only be set outside
 * a constructor if it isn't available when an object of this class is created,
 * for example in case of WebApplicationContext setup.
 * @param parent the parent context
 * @see org.springframework.web.context.ConfigurableWebApplicationContext
 */
void setParent(@Nullable ApplicationContext parent);

来源：https://stackoverflow.com/questions/46802260/how-to-define-multiple-sftp-connections

标签

Spring

spring-integration