本文介绍了使用 Java DSL 成功进行 ftp 传输后移动文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我已经使用 spring-integration java dsl 定义了一个流程来 ftp 传输文件,处理它,然后将其传输回存档"目录,最后将其移动到本地存档目录中.这是很容易"的事情:
I've defined a flow using spring-integration java dsl to ftp transfer a file, handle it, then transfer it back in an "archive" dir, and at last move it in a local archive dir. Which is something "quite easy" as:
@Bean
public IntegrationFlow ftpInboundFlow() {
if (ftpProperties.getEnabled() == false) {
return null;
}
logger.trace("Starting ftp flow");
return IntegrationFlows
.from(source -> source.ftp(ftpSessionFactory()).deleteRemoteFiles(true).preserveTimestamp(true)
.filter(compositeWithAcceptOnceFilter()) .remoteDirectory(ftpProperties.getRemoteDirectory())
.localDirectory(new File(ftpProperties.getLocalDirectory())).autoCreateLocalDirectory(true),
consumer -> consumer.id("ftpInboundAdapter")) /* Fine from() */
.handle(new GenericHandler<File>() {
@Override
@Transactional
public Object handle(File payload, Map<String, Object> headers) {
logger.debug("Data arrived {} {}", payload, payload.getClass().getName());
return payload;
}
}) /* Fine GenericHandler */
.handleWithAdapter(a -> a.ftp(ftpSessionFactory())
.remoteDirectory(ftpProperties.getRemoteArchiveDirectory()).autoCreateDirectory(true))
.get();
}
如果我追加
.handleWithAdapter(a -> a.file("'" + ftpProperties.getLocalArchiveDirectory() + "'")
.autoCreateDirectory(true).deleteSourceFiles(true))
在 ftp 适配器配置后,bean 初始化程序回复以下错误消息:
after the ftp adapter configuration the bean initializer replies with the following error message:
Caused by: org.springframework.beans.factory.BeanCreationException: The 'currentComponent' (org.springframework.integration.file.remote.handler.FileTransferringMessageHandler@80bfa9d) is a one-way 'MessageHandler' and it isn't appropriate to configure 'outputChannel'. This is the end of the integration flow.
我应该如何解决它?
推荐答案
作为一种解决方法,我重构了我的代码,放弃了文件适配器:
As a workaround I refactored my code in giving up with the file adapter:
@Bean
public IntegrationFlow ftpInboundFlow() {
return IntegrationFlows
.from(source -> source.ftp(ftpSessionFactory()).deleteRemoteFiles(true).preserveTimestamp(true)
.filter(compositeWithAcceptOnceFilter()) .remoteDirectory(ftpProperties.getRemoteDirectory())
.localDirectory(new File(ftpProperties.getLocalDirectory())).autoCreateLocalDirectory(true),
consumer -> consumer.id("ftpInboundAdapter")) /* Fine from() */
.handle(new GenericHandler<File>() {
@Override
@Transactional
public Object handle(File payload, Map<String, Object> headers) {
logger.debug("Data arrived {} {}", payload, payload.getClass().getName());
/* handle file content here ... */
/* ... then move it to archive */
File dstFile = new File("archive", payload);
FileUtils.moveFile(payload, dstFile);
return dstFile;
}
}) /* Fine GenericHandler */
/* Archive the remote file */
.handleWithAdapter(a -> a.ftp(ftpSessionFactory())
.remoteDirectory(ftpProperties.getRemoteArchiveDirectory()).autoCreateDirectory(true))
.get();
}
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