[英]Launch Spring Batch Job from Spring Integration
我需要从远程 SFTP 服务器下载一个文件并使用 spring 批处理来处理它们。 我已经使用 Spring Integration 实现了代码来下载文件。 但是我无法从 spring 集成组件启动 Spring Batch 作业。 我有以下代码:
@Autowired
private JobLauncher jobLauncher;
public String OUTPUT_DIR = "temp_dir";
@Value("${sftp.remote.host}")
private String sftpRemoteHost;
@Value("${sftp.remote.user}")
private String sftpUsername;
@Value("${sftp.remote.password}")
private String sftpPassword;
@Value("${sftp.remote.folder}")
private String sftpFolder;
@Bean
public DefaultSftpSessionFactory sftpSessionFactory() {
final DefaultSftpSessionFactory factory = new DefaultSftpSessionFactory();
factory.setHost(sftpRemoteHost);
factory.setAllowUnknownKeys(true);
factory.setUser(sftpUsername);
factory.setPassword(sftpPassword);
return factory;
}
@Bean
public SftpInboundFileSynchronizer sftpInboundFileSynchronizer() {
final SftpInboundFileSynchronizer fileSynchronizer = new SftpInboundFileSynchronizer(sftpSessionFactory());
fileSynchronizer.setDeleteRemoteFiles(false);
fileSynchronizer.setRemoteDirectory(sftpFolder);
fileSynchronizer.setFilter(new SftpSimplePatternFileListFilter("*.csv"));
return fileSynchronizer;
}
@Bean
@InboundChannelAdapter(channel = "sftpChannel", poller = @Poller(fixedDelay = "5000"))
public MessageSource<File> sftpMessageSource() {
final SftpInboundFileSynchronizingMessageSource source =
new SftpInboundFileSynchronizingMessageSource(sftpInboundFileSynchronizer());
source.setLocalDirectory(new File(OUTPUT_DIR));
source.setAutoCreateLocalDirectory(true);
source.setLocalFilter(new AcceptOnceFileListFilter<>());
return source;
}
@Bean
@ServiceActivator(inputChannel = "sftpChannel")
public MessageHandler handler() {
final FileWritingMessageHandler handler = new FileWritingMessageHandler(new File(OUTPUT_DIR));
handler.setFileExistsMode(FileExistsMode.REPLACE);
handler.setExpectReply(true);
handler.setOutputChannelName("parse-csv-channel");
return handler;
}
@ServiceActivator(inputChannel = "parse-csv-channel", outputChannel = "job-channel")
public JobLaunchRequest adapt(final File file) throws Exception {
final JobParameters jobParameters = new JobParametersBuilder().addString(
"input.file", file.getAbsolutePath()).toJobParameters();
return new JobLaunchRequest(batchConfiguration.job(), jobParameters);
}
@ServiceActivator(inputChannel = "job-channel", outputChannel = "finish")
public JobLaunchingMessageHandler jobHandler(JobLaunchRequest request) throws JobExecutionException {
return new JobLaunchingMessageHandler(jobLauncher);//.launch(request);
}
@ServiceActivator(inputChannel = "finish")
public void finish() {
System.out.println("FINISH");
}
但这不起作用(最后一个方法中的错误adapt
),因为没有找到 File 类型的 bean。 我无法将这两个部分放在一起。 如何进行连线集成和批处理?
你肯定只需要从你的adapt()
方法中删除@Bean
注释。 如果我们真的构建MessageHandler
bean,我们需要@Bean
,例如JobLaunchingMessageHandler
接受JobLaunchRequest
有效负载: https : JobLaunchRequest
通过消息。
在参考手册中查看有关消息传递注释的更多信息: https : //docs.spring.io/spring-integration/docs/4.3.12.RELEASE/reference/html/configuration.html#annotations_on_beans
更新
@Bean
@ServiceActivator(inputChannel = "sftpChannel")
public MessageHandler handler() {
final FileWritingMessageHandler handler = new FileWritingMessageHandler(new File(OUTPUT_DIR));
handler.setFileExistsMode(FileExistsMode.REPLACE);
handler.setExpectReply(true);
handler.setOutputChannelName("parse-csv-channel");
return handler;
}
@ServiceActivator(inputChannel = "parse-csv-channel", outputChannel = "job-channel")
public JobLaunchRequest adapt(final File file) throws Exception {
final JobParameters jobParameters = new JobParametersBuilder().addString(
"input.file", file.getAbsolutePath()).toJobParameters();
return new JobLaunchRequest(batchConfiguration.job(), jobParameters);
}
@Bean
@ServiceActivator(inputChannel = "job-channel")
public JobLaunchingGateway jobHandler() {
JobLaunchingGateway jobLaunchingGateway = new JobLaunchingGateway(jobLauncher);
jobLaunchingGateway.setOutputChannelName("finish");
return jobLaunchingGateway;
}
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