如果流远程目录文件时数据处理失败,则停止重命名文件

时间:2019-05-21 04:27:02

标签: spring-integration spring-integration-dsl spring-integration-sftp

我正在使用SFTP从远程目录读取文件。我可以使用出站网关按流获取文件,甚至可以将其移动到存档文件夹。

我正在处理文件中的数据,但是如果数据中存在某些问题,那么我会抛出错误。 我不想重命名文件,如果在处理数据时出现任何错误,我该如何实现。如果我能在使用spring集成时获得一些错误处理程序的良好实践,那将非常有帮助。

.handle(Sftp.outboundGateway(sftpSessionFactory(), GET, "payload.remoteDirectory + payload.filename").options(STREAM).temporaryFileSuffix("_reading"))
.handle(readData(),c->c.advice(afterReading()))
.enrichHeaders(h -> h
        .headerExpression(FileHeaders.RENAME_TO, "headers[file_remoteDirectory] + 'archive/' + headers[file_remoteFile]")
        .headerExpression(FileHeaders.REMOTE_FILE, "headers[file_remoteFile]")
        .header(FileHeaders.REMOTE_DIRECTORY, "headers[file_remoteDirectory]"))
.handle(Sftp.outboundGateway(sftpSessionFactory(), MV, "headers[file_remoteDirectory]+headers[file_remoteFile]").renameExpression("headers['file_renameTo']"))
.get();

@Bean
    public ExpressionEvaluatingRequestHandlerAdvice afterReading() {
        ExpressionEvaluatingRequestHandlerAdvice advice = new ExpressionEvaluatingRequestHandlerAdvice();
        advice.setSuccessChannelName("successReading.input");
        advice.setOnSuccessExpressionString("payload + ' was successful streamed'");
        advice.setFailureChannelName("failureReading.input");
        advice.setOnFailureExpressionString("payload + ' was bad, with reason: ' + #exception.cause.message");
        advice.setTrapException(true);
        advice.setPropagateEvaluationFailures(true);
        return advice;
    }

    @Bean
    public IntegrationFlow successReading() {
        return f -> f.log();
    }

    @Bean
    public IntegrationFlow failureReading() {
        return f -> f.log(ERROR);
    }


public GenericHandler readData() {
return new GenericHandler() {
    @Override
    public Object handle(Object o, Map map) {
        InputStream file = (InputStream) o;
        String fileName = (String) map.get(REMOTE_FILE);
        try {
            // processing data
        } catch (Exception e) {
            return new SftpException(500, String.format("Error while processing the file %s because of  Error: %s and reason %s", fileName, e.getMessage(), e.getCause()));
        }
        Closeable closeable = (Closeable) map.get(CLOSEABLE_RESOURCE);
        if (closeable != null) {
            try {
                closeable.close();
                file.close();
            } catch (Exception e) {
                logger.error(String.format("Session didn`t get closed after reading the stream data for file %s and error %s"), fileName, e.getMessage());
            }
        }
        return map;
    }
    };
}

已更新

1 个答案:

答案 0 :(得分:0)

ExpressionEvaluatingRequestHandlerAdvice添加到.handler()端点.handle(readData(), e -> e.advice(...))

  

最后提供的建议类别是o.s.i.handler.advice.ExpressionEvaluatingRequestHandlerAdvice。该建议比其他两个建议更笼统。它提供了一种机制,可以根据发送到端点的原始入站消息评估表达式。成功或失败之后,可以对单独的表达式进行求值。可以选择将包含评估结果的消息与输入消息一起发送到消息通道。