由于类型转换，目前我只能从ftp服务器下载文件。
因此，从已经将我的自定义POJO作为主体设置的管道中调用了下面提到的路由。自定义pojo如下：
public class DirectoryLocationListing {
private String domainName;
private String countryCode;
private String productName;
private String profileId;
private String directoryLocation;
sftp的路由如下，其中我从特定服务器的目录中获取所有文件，并将它们保留在本地文件路径中。
<route id="route5">
<from uri="direct:sftpGetCDRs"/>
<from uri="sftp://{{HOST}}//home/admin/ROSS_PULL_CDR/resellers/${body.directoryLocation}/?noop=true&streamDownload=true&username={{USER}}&password={{PASSWD}}"/>
<to uri="file://{{DB_DIR_LOC}}/temp/?fileName=${body.directoryLocation}/&autoCreate=true"/>
</route>
在运行应用程序时，我遇到了一个异常，在该异常之下，我觉得我不应该面对，因为from条目应该拾取文件并将其保留在to部分中，但是我放置在to部分中似乎是在引用路由中的主体，而不是从ftp服务器中提取的文件。
---------------------------------------------------------------------------------------------------------------------------------------
RouteId ProcessorId Processor Elapsed (ms)
[_route1 ] [_route1 ] [quartz2://spring?cron=0+*+*+%3F+*+* ] [ 121]
[_route2 ] [_choice1 ] [when[simple{${body.domainName} != null and ${body.countryCode} !=
null] [ 6]
[_route2 ] [_to4 ] [bean:pullCDRProcessorWithFTP?method=createTemporaryDirectoryWithDirLoc ] [ 1]
[_route2 ] [_log6 ] [log ] [ 1]
[_route2 ] [_to4 ] [direct:sftpGetCDRs ] [ 3]
[route5 ] [to1 ] [file://C:/example/export/home/resellerid/wmcdr/cdr/temp/?fileName=${body.director] [ 2]
Exchange
---------------------------------------------------------------------------------------------------------------------------------------
Exchange[
Id ID-IGL70051-59483-1550660613598-0-7
ExchangePattern InOnly
Headers {breadcrumbId=ID-IGL70051-59483-1550660613598-0-1, calendar=null, CamelFileName=null, CamelRedelivered=false, CamelRedeliveryCounter=0, fireTime=Wed Feb 20 16:34:00 IST 2019, jobDetail=JobDetail 'Camel_camelContext-f6f63d02-4688-4b3f-b3ca-b206a61cbe9f.spring': jobClass: 'org.apache.camel.component.quartz2.CamelJob concurrentExectionDisallowed: false persistJobDataAfterExecution: false isDurable: false requestsRecovers: false, jobInstance=org.apache.camel.component.quartz2.CamelJob@65314fe3, jobRunTime=-1, mergedJobDataMap=org.quartz.JobDataMap@f7fbba19, nextFireTime=Wed Feb 20 16:35:00 IST 2019, previousFireTime=null, refireCount=0, result=null, scheduledFireTime=Wed Feb 20 16:34:00 IST 2019, scheduler=org.quartz.impl.StdScheduler@59c9a1bf, trigger=Trigger 'Camel_camelContext-f6f63d02-4688-4b3f-b3ca-b206a61cbe9f.spring': triggerClass: 'org.quartz.impl.triggers.CronTriggerImpl calendar: 'null' misfireInstruction: 1 nextFireTime: Wed Feb 20 16:35:00 IST 2019, triggerGroup=Camel_camelContext-f6f63d02-4688-4b3f-b3ca-b206a61cbe9f, triggerName=spring}
BodyType com.example.cdr.model.DirectoryLocationListing
Body com.example.cdr.model.DirectoryLocationListing@23a2ecf4
]
Stacktrace
---------------------------------------------------------------------------------------------------------------------------------------
org.apache.camel.component.file.GenericFileOperationFailedException: Cannot store file: C:\EXAMPLE\export\home\resellerid\wmcdr\cdr\temp\IN\healthyindia\apj\SERVICEID
at org.apache.camel.component.file.FileOperations.storeFile(FileOperations.java:292)
at org.apache.camel.component.file.GenericFileProducer.writeFile(GenericFileProducer.java:277)
at org.apache.camel.component.file.GenericFileProducer.processExchange(GenericFileProducer.java:165)
at org.apache.camel.component.file.GenericFileProducer.process(GenericFileProducer.java:79)
at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:129)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:448)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:51)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:129)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:448)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:118)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:80)
at org.apache.camel.processor.ChoiceProcessor.process(ChoiceProcessor.java:111)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:448)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:448)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.processor.MulticastProcessor.doProcessSequential(MulticastProcessor.java:590)
at org.apache.camel.processor.MulticastProcessor.doProcessSequential(MulticastProcessor.java:518)
at org.apache.camel.processor.MulticastProcessor.process(MulticastProcessor.java:227)
at org.apache.camel.processor.Splitter.process(Splitter.java:104)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:448)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:118)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:80)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:448)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:118)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:80)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:51)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:129)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:448)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:109)
at org.apache.camel.processor.MulticastProcessor.doProcessParallel(MulticastProcessor.java:736)
at org.apache.camel.processor.MulticastProcessor.access$200(MulticastProcessor.java:83)
at org.apache.camel.processor.MulticastProcessor$1.call(MulticastProcessor.java:304)
at org.apache.camel.processor.MulticastProcessor$1.call(MulticastProcessor.java:289)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.camel.InvalidPayloadException: No body available of type: java.io.InputStream but has value: com.EXAMPLE.cdr.model.DirectoryLocationListing@5a519bb2 of type: com.EXAMPLE.cdr.model.DirectoryLocationListing on: Message: com.EXAMPLE.cdr.model.DirectoryLocationListing@5a519bb2. Caused by: No type converter available to convert from type: com.EXAMPLE.cdr.model.DirectoryLocationListing to the required type: java.io.InputStream with value com.EXAMPLE.cdr.model.DirectoryLocationListing@5a519bb2. Exchange[Message: com.EXAMPLE.cdr.model.DirectoryLocationListing@5a519bb2]. Caused by: [org.apache.camel.NoTypeConversionAvailableException - No type converter available to convert from type: com.EXAMPLE.cdr.model.DirectoryLocationListing to the required type: java.io.InputStream with value com.EXAMPLE.cdr.model.DirectoryLocationListing@5a519bb2]
at org.apache.camel.impl.MessageSupport.getMandatoryBody(MessageSupport.java:101)
at org.apache.camel.component.file.FileOperations.storeFile(FileOperations.java:273)
... 52 more
Caused by: org.apache.camel.NoTypeConversionAvailableException: No type converter available to convert from type: com.EXAMPLE.cdr.model.DirectoryLocationListing to the required type: java.io.InputStream with value com.EXAMPLE.cdr.model.DirectoryLocationListing@5a519bb2
at org.apache.camel.impl.converter.BaseTypeConverterRegistry.mandatoryConvertTo(BaseTypeConverterRegistry.java:177)
at org.apache.camel.impl.MessageSupport.getMandatoryBody(MessageSupport.java:99)
如果有人遇到相同问题，请进行指导。 因此，可能需要类型转换，但在这种情况下我看不到它是必需的。
**更新**
使用花粉后，我的路线如下：
<route id="route5">
<from uri="direct:sftpGetCDRs"/>
<process ref="sftpGetDirLocation"/>
<log message="property ${exchangeProperty.ftpGetDirectory}"/>
<pollEnrich uri="sftp://{{HOST}}//home/admin/ROSS_PULL_CDR/resellers/${exchangeProperty.ftpGetDirectory}/?noop=true&streamDownload=true&username={{USER}}&password={{PASSWD}}" timeout="0"/>
<to uri="file://{{DB_DIR_LOC}}/temp/?fileName=${body.directoryLocation}/&autoCreate=true"/>
</route>
我在这里指的处理器是
@Component("sftpGetDirLocation")
public class SFTPGetDirLocation implements Processor{
public void process(Exchange exchange) throws Exception {
exchange.setProperty("ftpGetDirectory", exchange.getIn().getBody(DirectoryLocationListing.class).getDirectoryLocation());
}
}
但是，在更改之后，我的假设是pollEnrich会将sftp从URI获得的任何内容（可能是文件）保留为sftp，并将其保留为主体。 相反，我看到主体为空
Message History
---------------------------------------------------------------------------------------------------------------------------------------
RouteId ProcessorId Processor Elapsed (ms)
[_route1 ] [_route1 ] [quartz2://spring?cron=0+*+*+%3F+*+* ] [ 657]
[_route2 ] [_choice1 ] [when[simple{${body.domainName} != null and ${body.countryCode} !=
null] [ 572]
[_route2 ] [_to4 ] [bean:pullCDRProcessorWithFTP?method=createTemporaryDirectoryWithDirLoc ] [ 2]
[_route2 ] [_log6 ] [log ] [ 7]
[_route2 ] [_to4 ] [direct:sftpGetCDRs ] [ 523]
[route5 ] [process1 ] [ref:sftpGetDirLocation ] [ 0]
[route5 ] [log1 ] [log ] [ 1]
[route5 ] [pollEnrich1 ] [pollEnrich[sftp://10.91.142.11//home/admin/ROSS_PULL_CDR/resellers/${exchangeP] [ 514]
[route5 ] [log2 ] [log ] [ 0]
[route5 ] [to1 ] [file://C:/EXAMPLE/export/home/resellerid/wmcdr/cdr/temp/?fileName=${body.director] [ 0]
Exchange
---------------------------------------------------------------------------------------------------------------------------------------
Exchange[
Id ID-IGL70051-57920-1550721464331-0-4
ExchangePattern InOnly
Headers {breadcrumbId=ID-IGL70051-57920-1550721464331-0-1, calendar=null, CamelFileName=null, CamelRedelivered=false, CamelRedeliveryCounter=0, CamelToEndpoint=sftp://10.91.142.11//home/admin/ROSS_PULL_CDR/resellers/$%7BexchangeProperty.ftpGetDirectory%7D/?noop=true&password=tcpip123&streamDownload=true&username=admin, fireTime=Thu Feb 21 09:28:00 IST 2019, jobDetail=JobDetail 'Camel_camelContext-f6f63d02-4688-4b3f-b3ca-b206a61cbe9f.spring': jobClass: 'org.apache.camel.component.quartz2.CamelJob concurrentExectionDisallowed: false persistJobDataAfterExecution: false isDurable: false requestsRecovers: false, jobInstance=org.apache.camel.component.quartz2.CamelJob@363935fd, jobRunTime=-1, mergedJobDataMap=org.quartz.JobDataMap@f7fbba19, nextFireTime=Thu Feb 21 09:29:00 IST 2019, previousFireTime=null, refireCount=0, result=null, scheduledFireTime=Thu Feb 21 09:28:00 IST 2019, scheduler=org.quartz.impl.StdScheduler@5bf7fd08, trigger=Trigger 'Camel_camelContext-f6f63d02-4688-4b3f-b3ca-b206a61cbe9f.spring': triggerClass: 'org.quartz.impl.triggers.CronTriggerImpl calendar: 'null' misfireInstruction: 1 nextFireTime: Thu Feb 21 09:29:00 IST 2019, triggerGroup=Camel_camelContext-f6f63d02-4688-4b3f-b3ca-b206a61cbe9f, triggerName=spring}
BodyType null
Body [Body is null]
]
因此是
Stacktrace
---------------------------------------------------------------------------------------------------------------------------------------
org.apache.camel.component.file.GenericFileOperationFailedException: Cannot write null body to file: C:\EXAMPLE\export\home\resellerid\wmcdr\cdr\temp
at org.apache.camel.component.file.FileOperations.storeFile(FileOperations.java:205)
答案 0 :(得分：2)
我认为代码中存在三个问题。
您正在向类型为route5的正文的DirectoryLocationListing发送交换消息，并且您希望sftp组件使用带有第二个from定义的消息。没用当SFTP组件下载文件时，交换上的正文将由真实文件（类型为org.apache.camel.component.file.GenericFile）替换，并且您将丢失上一个附件中的DirectoryLocationListing对象。如果您将pojo设置在身体以外的其他地方，Content Enriher EIP是一个不错的选择。
在当前情况下，在路由结束时，您期望来自sftp端点的文件，但实际上传递给您的是与DirectoryLocationListing类型的主体的交换您的SFTP组件无效）。骆驼没有办法做这种魔术并将其持久化到磁盘上。这正是它所抱怨的。
2.1。解决此问题（并且SFTP组件开始工作）后，您将遇到下一种情况，即发送到to终结点的消息现在是文件，您需要以某种方式保留{{1 }}，直到路途尽头为止。
directoryLocation定义中的 fileName参数指向目录。它不会工作。您必须使用动态端点定义
我对Camel的XML DSL不熟悉。因此，我将展示如何使用Java DSL做到这一点。我将避免使用SFTP进行冲泡，而应使用to组件。我们将尝试一次性解决所有这些问题。
路线定义
file from("direct:test")
.routeId("route5")
.log("=> body.directoryLocation is: ${body.directoryLocation}") //Just to see if we can read the directoryLocation property from the POJO
.process(exchange -> exchange.setProperty("WriteTargetDirectory",exchange.getIn().getBody(DirectoryListing.class).directoryLocation)) //Move directoryLocation property to an exchange property named WriteTargetDirectory
.pollEnrich()
.simple("file://source/${exchangeProperty.WriteTargetDirectory}/?noop=true")//Poll enrich magic here!
.log("=> I still have the target directory location as : ${exchangeProperty.WriteTargetDirectory}")
.log("=> I just received file [${in.header." + Exchange.FILE_NAME + "}] and will write it as [${exchangeProperty.WriteTargetDirectory}/${in.header." + Exchange.FILE_NAME + "}]" )
.toD("file://destination/${exchangeProperty.WriteTargetDirectory}/");
类
DirectoryListing路由测试代码
public class DirectoryListing {
String directoryLocation;
public DirectoryListing(String directoryLocation) {
this.directoryLocation = directoryLocation;
}
public String getDirectoryLocation() {
return directoryLocation;
}
}
测试记录
template.sendBody("direct:test",new DirectoryListing("IN/healthyindia/"));
答案 1 :(得分：0)
最后，在shelldragon的指导下，以下骆驼上下文路线对我有用：
<route id="route5">
<from id="_from5" uri="direct:sftpGetCDRs"/>
<process id="_process1" ref="sftpGetDirLocation"/>
<log id="_log17" message="property ${exchangeProperty.ftpGetDirectory}"/>
<pollEnrich id="_pollEnrich1" timeout="0" uri="sftp://{{HOST}}//home/admin/ROSS_PULL_CDR/resellers/temp/${body.directoryLocation}/?consumer.delay=60000&username={{USER}}&password={{PASSWD}}"/>
<log id="_log18" message="${body}"/>
<to id="_to2" uri="file://{{DB_DIR_LOC}}/temp/?fileName=${exchangeProperty.ftpGetDirectory}&autoCreate=true"/>
</route>