Question

我有UC，我需要从ftp位置选择文件并将其放入服务器位置我正在使用ftp-inbound-channel-adapter（Spring集成 - 2.0.4）来实现它。以下是我的xml中的配置

 <bean id="ftpAASessionFactory" class="org.springframework.integration.ftp.session.DefaultFtpSessionFactory">
          <property name="host" value="${ftp.session.host}" />
          <property name="port" value="${ftp.session.port}" />
          <property name="username" value="${ftp.session.username}" />
          <property name="password" value="${ftp.session.password}" />
          <property name="clientMode" value="0" />
          <property name="fileType" value="0" />
   </bean>


   <ftp:inbound-channel-adapter id="ftpAAInbound"
          channel="ftpChannel" session-factory="ftpAASessionFactory" charset="UTF-8"
          auto-create-local-directory="false" delete-remote-files="true"
          remote-directory="${ftp.source.location}" local-directory="file://${ftp.target.location}"
          >
          <int:poller max-messages-per-poll="5" cron="0 */2 * ? * *">
          </int:poller>

   </ftp:inbound-channel-adapter>

   <int:channel id="ftpChannel">
          <int:queue />
          <int:interceptors>
                 <int:wire-tap channel="debugLogger" />
          </int:interceptors>
   </int:channel>

   <int:logging-channel-adapter id="debugLogger"
          level="DEBUG" log-full-message="true" />

   <int:logging-channel-adapter id="errorLogger"
          level="ERROR" log-full-message="true" />

我已将max-messages-per-poll配置为5并且每隔均匀分钟进行一次轮询（使用cron表达式）。

我的问题是，如果我们在ftp位置有6个文件，所有6个文件都会在第一次轮询时传输到服务器位置（根据每个轮询的最大消息数= 5，它应该只从Ftp位置选择5个文件并且有效载荷仅形成5个文件。

我想在第一次轮询时只将5个文件传输到我的服务器，在第二次轮询时我应该选择最后一个

请建议解决方案 TIA

当ftp位置有6个文件时PFB日志

    [CRA] [01/03/2017 12:38:00] DEBUG [task-scheduler-8] DefaultFtpSessionFactory.createClient(158) | Connected to server [prgrear01.group.root.ad:21]
***[CRA] [01/03/2017 12:38:00] INFO [task-scheduler-8] FtpSession.read(79) | File has been successfully transfered from: /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_808_2015_02_01_07_50_01_102_20.txt***
[CRA] [01/03/2017 12:38:00] DEBUG [task-scheduler-8] FtpInboundFileSynchronizer.copyFileToLocalDirectory(219) | deleted /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_808_2015_02_01_07_50_01_102_20.txt
[CRA] [01/03/2017 12:38:00] INFO [task-scheduler-8] FtpSession.read(79) | File has been successfully transfered from: /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_808_2017_02_22_07_50_01_102_02.txt
[CRA] [01/03/2017 12:38:00] DEBUG [task-scheduler-8] FtpInboundFileSynchronizer.copyFileToLocalDirectory(219) | deleted /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_808_2017_02_22_07_50_01_102_02.txt
[CRA] [01/03/2017 12:38:01] INFO [task-scheduler-8] FtpSession.read(79) | File has been successfully transfered from: /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_809_2015_02_01_07_50_01_102_01.txt
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] FtpInboundFileSynchronizer.copyFileToLocalDirectory(219) | deleted /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_809_2015_02_01_07_50_01_102_01.txt
[CRA] [01/03/2017 12:38:01] INFO [task-scheduler-8] FtpSession.read(79) | File has been successfully transfered from: /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_809_2015_02_01_07_50_01_102_21.txt
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] FtpInboundFileSynchronizer.copyFileToLocalDirectory(219) | deleted /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_809_2015_02_01_07_50_01_102_21.txt
[CRA] [01/03/2017 12:38:01] INFO [task-scheduler-8] FtpSession.read(79) | File has been successfully transfered from: /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_809_2017_02_22_07_50_01_102_02.txt
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] FtpInboundFileSynchronizer.copyFileToLocalDirectory(219) | deleted /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_809_2017_02_22_07_50_01_102_02.txt
[CRA] [01/03/2017 12:38:01] INFO [task-scheduler-8] FtpSession.read(79) | File has been successfully transfered from: /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_810_2017_02_22_07_50_01_102_02.txt
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] FtpInboundFileSynchronizer.copyFileToLocalDirectory(219) | deleted /FTPManifestSrcDev/R2_2a/FTPManifestSrcDev/ABC_810_2017_02_22_07_50_01_102_02.txt
***[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] FileReadingMessageSource.scanInputDirectory(272) | Added to queue: [D:\applications\files\local\ABC_808_2015_02_01_07_50_01_102_20.txt, D:\applications\files\local\ABC_808_2017_02_22_07_50_01_102_02.txt, D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_01.txt, D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_21.txt, D:\applications\files\local\ABC_809_2017_02_22_07_50_01_102_02.txt, D:\applications\files\local\ABC_810_2017_02_22_07_50_01_102_02.txt]
[CRA] [01/03/2017 12:38:01] INFO [task-scheduler-8] FileReadingMessageSource.receive(260) | Created message: [[Payload=D:\applications\files\local\ABC_808_2015_02_01_07_50_01_102_20.txt][Headers={timestamp=1488352081732, id=46536ab1-c0bd-4cf4-9867-b7d99e462ed5}]]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] SourcePollingChannelAdapter.doPoll(91) | Poll resulted in Message: [Payload=D:\applications\files\local\ABC_808_2015_02_01_07_50_01_102_20.txt][Headers={timestamp=1488352081732, id=46536ab1-c0bd-4cf4-9867-b7d99e462ed5}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8]*** QueueChannel.preSend(224) | preSend on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_808_2015_02_01_07_50_01_102_20.txt][Headers={timestamp=1488352081732, id=46536ab1-c0bd-4cf4-9867-b7d99e462ed5}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.preSend(224) | preSend on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_808_2015_02_01_07_50_01_102_20.txt][Headers={timestamp=1488352081732, id=46536ab1-c0bd-4cf4-9867-b7d99e462ed5}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessage(67) | org.springframework.integration.handler.LoggingHandler#0 received message: [Payload=D:\applications\files\local\ABC_808_2015_02_01_07_50_01_102_20.txt][Headers={timestamp=1488352081732, id=46536ab1-c0bd-4cf4-9867-b7d99e462ed5}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessageInternal(141) | [Payload=D:\applications\files\local\ABC_808_2015_02_01_07_50_01_102_20.txt][Headers={timestamp=1488352081732, id=46536ab1-c0bd-4cf4-9867-b7d99e462ed5}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.postSend(237) | postSend (sent=true) on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_808_2015_02_01_07_50_01_102_20.txt][Headers={timestamp=1488352081732, id=46536ab1-c0bd-4cf4-9867-b7d99e462ed5}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] QueueChannel.postSend(237) | postSend (sent=true) on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_808_2015_02_01_07_50_01_102_20.txt][Headers={timestamp=1488352081732, id=46536ab1-c0bd-4cf4-9867-b7d99e462ed5}]
[CRA] [01/03/2017 12:38:01] INFO [task-scheduler-8] FileReadingMessageSource.receive(260) | Created message: [[Payload=D:\applications\files\local\ABC_808_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081784, id=336045cf-0abd-4b1d-b698-d82c230e4b1f}]]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] SourcePollingChannelAdapter.doPoll(91) | Poll resulted in Message: [Payload=D:\applications\files\local\ABC_808_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081784, id=336045cf-0abd-4b1d-b698-d82c230e4b1f}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] QueueChannel.preSend(224) | preSend on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_808_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081784, id=336045cf-0abd-4b1d-b698-d82c230e4b1f}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.preSend(224) | preSend on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_808_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081784, id=336045cf-0abd-4b1d-b698-d82c230e4b1f}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessage(67) | org.springframework.integration.handler.LoggingHandler#0 received message: [Payload=D:\applications\files\local\ABC_808_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081784, id=336045cf-0abd-4b1d-b698-d82c230e4b1f}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessageInternal(141) | [Payload=D:\applications\files\local\ABC_808_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081784, id=336045cf-0abd-4b1d-b698-d82c230e4b1f}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.postSend(237) | postSend (sent=true) on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_808_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081784, id=336045cf-0abd-4b1d-b698-d82c230e4b1f}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] QueueChannel.postSend(237) | postSend (sent=true) on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_808_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081784, id=336045cf-0abd-4b1d-b698-d82c230e4b1f}]
[CRA] [01/03/2017 12:38:01] INFO [task-scheduler-8] FileReadingMessageSource.receive(260) | Created message: [[Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_01.txt][Headers={timestamp=1488352081786, id=75029ba5-4857-4a4e-832f-b8c657b539e3}]]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] SourcePollingChannelAdapter.doPoll(91) | Poll resulted in Message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_01.txt][Headers={timestamp=1488352081786, id=75029ba5-4857-4a4e-832f-b8c657b539e3}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] QueueChannel.preSend(224) | preSend on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_01.txt][Headers={timestamp=1488352081786, id=75029ba5-4857-4a4e-832f-b8c657b539e3}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.preSend(224) | preSend on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_01.txt][Headers={timestamp=1488352081786, id=75029ba5-4857-4a4e-832f-b8c657b539e3}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessage(67) | org.springframework.integration.handler.LoggingHandler#0 received message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_01.txt][Headers={timestamp=1488352081786, id=75029ba5-4857-4a4e-832f-b8c657b539e3}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessageInternal(141) | [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_01.txt][Headers={timestamp=1488352081786, id=75029ba5-4857-4a4e-832f-b8c657b539e3}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.postSend(237) | postSend (sent=true) on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_01.txt][Headers={timestamp=1488352081786, id=75029ba5-4857-4a4e-832f-b8c657b539e3}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] QueueChannel.postSend(237) | postSend (sent=true) on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_01.txt][Headers={timestamp=1488352081786, id=75029ba5-4857-4a4e-832f-b8c657b539e3}]
[CRA] [01/03/2017 12:38:01] INFO [task-scheduler-8] FileReadingMessageSource.receive(260) | Created message: [[Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_21.txt][Headers={timestamp=1488352081789, id=edea505f-37a2-4c96-8034-b3c74f55f9de}]]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] SourcePollingChannelAdapter.doPoll(91) | Poll resulted in Message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_21.txt][Headers={timestamp=1488352081789, id=edea505f-37a2-4c96-8034-b3c74f55f9de}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] QueueChannel.preSend(224) | preSend on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_21.txt][Headers={timestamp=1488352081789, id=edea505f-37a2-4c96-8034-b3c74f55f9de}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.preSend(224) | preSend on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_21.txt][Headers={timestamp=1488352081789, id=edea505f-37a2-4c96-8034-b3c74f55f9de}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessage(67) | org.springframework.integration.handler.LoggingHandler#0 received message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_21.txt][Headers={timestamp=1488352081789, id=edea505f-37a2-4c96-8034-b3c74f55f9de}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessageInternal(141) | [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_21.txt][Headers={timestamp=1488352081789, id=edea505f-37a2-4c96-8034-b3c74f55f9de}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.postSend(237) | postSend (sent=true) on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_21.txt][Headers={timestamp=1488352081789, id=edea505f-37a2-4c96-8034-b3c74f55f9de}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] QueueChannel.postSend(237) | postSend (sent=true) on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_809_2015_02_01_07_50_01_102_21.txt][Headers={timestamp=1488352081789, id=edea505f-37a2-4c96-8034-b3c74f55f9de}]
[CRA] [01/03/2017 12:38:01] INFO [task-scheduler-8] FileReadingMessageSource.receive(260) | Created message: [[Payload=D:\applications\files\local\ABC_809_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081792, id=5123c737-02d1-4846-9001-011796d92aa0}]]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] SourcePollingChannelAdapter.doPoll(91) | Poll resulted in Message: [Payload=D:\applications\files\local\ABC_809_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081792, id=5123c737-02d1-4846-9001-011796d92aa0}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] QueueChannel.preSend(224) | preSend on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_809_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081792, id=5123c737-02d1-4846-9001-011796d92aa0}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.preSend(224) | preSend on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_809_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081792, id=5123c737-02d1-4846-9001-011796d92aa0}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessage(67) | org.springframework.integration.handler.LoggingHandler#0 received message: [Payload=D:\applications\files\local\ABC_809_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081792, id=5123c737-02d1-4846-9001-011796d92aa0}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] LoggingHandler.handleMessageInternal(141) | [Payload=D:\applications\files\local\ABC_809_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081792, id=5123c737-02d1-4846-9001-011796d92aa0}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] DirectChannel.postSend(237) | postSend (sent=true) on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_809_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081792, id=5123c737-02d1-4846-9001-011796d92aa0}]
[CRA] [01/03/2017 12:38:01] DEBUG [task-scheduler-8] QueueChannel.postSend(237) | postSend (sent=true) on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_809_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352081792, id=5123c737-02d1-4846-9001-011796d92aa0}]
[CRA] [01/03/2017 12:40:00] INFO [task-scheduler-8] FileReadingMessageSource.receive(260) | Created message: [[Payload=D:\applications\files\local\ABC_810_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352200005, id=7a0a0ea6-e573-4981-9e2f-89ae0f646b50}]]
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] SourcePollingChannelAdapter.doPoll(91) | Poll resulted in Message: [Payload=D:\applications\files\local\ABC_810_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352200005, id=7a0a0ea6-e573-4981-9e2f-89ae0f646b50}]
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] QueueChannel.preSend(224) | preSend on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_810_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352200005, id=7a0a0ea6-e573-4981-9e2f-89ae0f646b50}]
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] DirectChannel.preSend(224) | preSend on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_810_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352200005, id=7a0a0ea6-e573-4981-9e2f-89ae0f646b50}]
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] LoggingHandler.handleMessage(67) | org.springframework.integration.handler.LoggingHandler#0 received message: [Payload=D:\applications\files\local\ABC_810_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352200005, id=7a0a0ea6-e573-4981-9e2f-89ae0f646b50}]
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] LoggingHandler.handleMessageInternal(141) | [Payload=D:\applications\files\local\ABC_810_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352200005, id=7a0a0ea6-e573-4981-9e2f-89ae0f646b50}]
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] DirectChannel.postSend(237) | postSend (sent=true) on channel 'debugLogger', message: [Payload=D:\applications\files\local\ABC_810_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352200005, id=7a0a0ea6-e573-4981-9e2f-89ae0f646b50}]
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] QueueChannel.postSend(237) | postSend (sent=true) on channel 'ftpChannel', message: [Payload=D:\applications\files\local\ABC_810_2017_02_22_07_50_01_102_02.txt][Headers={timestamp=1488352200005, id=7a0a0ea6-e573-4981-9e2f-89ae0f646b50}]
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] DefaultFtpSessionFactory.createClient(158) | Connected to server [prgrear01.group.root.ad:21]
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] SourcePollingChannelAdapter.doPoll(91) | Poll resulted in Message: null
[CRA] [01/03/2017 12:40:00] DEBUG [task-scheduler-8] SourcePollingChannelAdapter.doPoll(101) | Received no Message during the poll, returning 'fal

.......

Answer 1

该日志仅显示4个文件;看起来每个投票配置3条消息，它清楚地显示3个文件是在12:38和1和12:40发送的（没有找到第五个文件）。

Poll resulted in Message: null

修改

这是实现所需结果的另一种方法（使用出站网关）。此版本使用Java DSL。

如果您更喜欢使用XML配置，则在ftp-sample中提供类似的流程（在XML中） - 您必须在ls网关和拆分器之间插入文件限制器。

@SpringBootApplication public class So42528316Application { public static void main(String[] args) throws Exception { ConfigurableApplicationContext context = SpringApplication.run(So42528316Application.class, args); try { context.getBean(So42528316Application.class).runDemo(); } finally { context.close(); } } @Autowired private FileGateway fetchAndProcess; private void runDemo() throws Exception { Collection<Boolean> rmResults = this.fetchAndProcess.processFilesAt("so42528316"); while (rmResults != null) { System.out.println("Processed " + rmResults.size() + " files"); Thread.sleep(10_000); rmResults = this.fetchAndProcess.processFilesAt("so42528316"); } System.out.println("No more files available"); } @MessagingGateway(defaultRequestChannel = "flow.input", defaultReplyTimeout = "0") public interface FileGateway { Collection<Boolean> processFilesAt(String pattern); } @Bean public DefaultFtpSessionFactory sessionFactory() { DefaultFtpSessionFactory factory = new DefaultFtpSessionFactory(); factory.setHost("10.0.0.3"); factory.setUsername("ftptest"); factory.setPassword("ftptest"); factory.setClientMode(FTPClient.PASSIVE_LOCAL_DATA_CONNECTION_MODE); return factory; } @Bean public IntegrationFlow flow() { return f -> f .handle(Ftp.outboundGateway(sessionFactory(), "ls", "payload")) .handle("so42528316Application", "limitFiles") .split() .handle(Ftp.outboundGateway(sessionFactory(), "get", "payload.remoteDirectory + '/' + payload.filename") .localDirectory(new File("/tmp", "so42528316"))) .handle("so42528316Application", "process") .handle(Ftp.outboundGateway(sessionFactory(), "rm", "headers['file_remoteDirectory'] + '/' + headers['file_remoteFile']")) .aggregate(); } public List<FtpFileInfo> limitFiles(List<FtpFileInfo> files) { // Add any logic you want here, e.g. check if file already on local disk. if (files.size() == 0) { return null; } else if (files.size() > 2) { System.out.println("Reducing fetch list from " + files.size() + " to 2"); return files.stream().limit(2).collect(Collectors.toList()); } else { return files; } } public String process(File file) { System.out.println("Processing " + file); file.delete(); return file.getName(); } }

结果：

Reducing fetch list from 3 to 2 Processing /tmp/so42528316/bar.txt Processing /tmp/so42528316/baz.txt Processed 2 files Processing /tmp/so42528316/foo.txt Processed 1 files No more files available

考虑max-message-per poll和Cron，如何轮询FTP入站通道适配器

1 个答案: