java Apache Camel:具有属性和属性占位符的RecipientList不起作用
我正在尝试使用Camel Java DSL将文件路由到SFTP服务器，如下所示：
.recipientList(simple("sftp://{{hostname}}:{{port}}/" + exchangeProperty(destinationDir) + "?username={{username}}&preferredAuthentications=publickey&privateKeyFile={{pkfilelocation}}&privateKeyPassphrase={{pkPassphrase}}"))
但是，当消息到达此端点时，Camel将引发以下异常：
org.apache.camel.component.file.GenericFileOperationFailedException: Cannot change directory to: exchangeProperty{destinationDir}
at org.apache.camel.component.file.remote.SftpOperations.doChangeDirectory(SftpOperations.java:596)
at org.apache.camel.component.file.remote.SftpOperations.changeCurrentDirectory(SftpOperations.java:584)
at org.apache.camel.component.file.remote.SftpOperations.storeFile(SftpOperations.java:830)
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.remote.RemoteFileProducer.process(RemoteFileProducer.java:58)
at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:110)
at org.apache.camel.builder.NoErrorHandlerBuilder$1.process(NoErrorHandlerBuilder.java:40)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198)
at org.apache.camel.processor.MulticastProcessor.doProcessSequential(MulticastProcessor.java:695)
at org.apache.camel.processor.MulticastProcessor.doProcessSequential(MulticastProcessor.java:623)
at org.apache.camel.processor.MulticastProcessor.process(MulticastProcessor.java:247)
at org.apache.camel.processor.RecipientList.sendToRecipientList(RecipientList.java:172)
at org.apache.camel.processor.RecipientList.process(RecipientList.java:132)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:120)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:83)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:110)
at org.apache.camel.builder.NoErrorHandlerBuilder$1.process(NoErrorHandlerBuilder.java:40)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:120)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:83)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198)
at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:62)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:145)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:541)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:541)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198)
at org.apache.camel.processor.MulticastProcessor.doProcessSequential(MulticastProcessor.java:695)
at org.apache.camel.processor.MulticastProcessor.doProcessSequential(MulticastProcessor.java:623)
at org.apache.camel.processor.MulticastProcessor.process(MulticastProcessor.java:247)
at org.apache.camel.processor.Splitter.process(Splitter.java:114)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:541)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:120)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:83)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:97)
at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:112)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:721)
at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:681)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:651)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:317)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:255)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1166)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1158)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:1055)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: 2: No such file
at com.jcraft.jsch.ChannelSftp.throwStatusError(ChannelSftp.java:2873)
at com.jcraft.jsch.ChannelSftp._realpath(ChannelSftp.java:2367)
at com.jcraft.jsch.ChannelSftp.cd(ChannelSftp.java:342)
at org.apache.camel.component.file.remote.SftpOperations.doChangeDirectory(SftpOperations.java:594)
... 53 more
我可以看到destinationDir属性是在stacktrace中打印的exchange上设置的。如果我替换
- exchangeProperty(destinationDir) +
在具有实际目的地目录（tmp/destination/dir1/）的路由中，它可以正常工作。问题是，我需要目标目录是动态的。我尝试在路由（>；2.16.0）中使用${exchangeProperty.destinationDir}，在路由中使用${property.destinationDir}，但都没有效果。“非交换”属性占位符也可以很好地解析
调试Camel SFTP库时，我可以看到at SftpOperations.class:594，path设置为exchangeProperty{destinationDir}。
这并没有被取代，这就是它失败的原因
注意：我在{port}}之后有/（不在destinationDir属性中），因为否则，Camel SFTP组件会抛出一个异常，表示未定义主机
有没有人对如何获取属性占位符和交换属性以动态使用SFTP有什么建议？我试过托德（“…”）也没有运气
Camelv 2.19.0
# 1 楼答案
我试过很多不同的方法。托德。只有。到没有运气的接受者名单等。我确实找到了一个简单的解决方法，但是对于任何遭受同样挫折的人来说：
简单的手动动态字符串替换。很有魅力。有时编写camel代码的最佳方法是避免使用camel:）