如何使用 Camel 组件 File2 中的包含参数按扩展名过滤文件 [英] How to filter files by extensions using include parameter in Camel component File2

问题描述

我需要最简单的扩展过滤器:例如文件 20120523.173227.CustomerMaster05092012.QWERTY.xml路线:

I need the simplest filter by extension: f.e. file 20120523.173227.CustomerMaster05092012.QWERTY.xml route:

<from uri="file://{{fdr.folder.working.url}}&amp;include=*.xml"/>

不起作用:

索引 0 附近的悬空元字符 '*'

Dangling meta character '*' near index 0

WARN - file://root_folder/working/) [FileConsumer] Consumer Consumer[file://root_folder/working/?delay=1000&delete=true&idempotent=false&include=*.xml&initialDelay=1000&readLock=changed] failed polling endpoint: Endpoint[file://root_folder/working/?delay=1000&delete=true&idempotent=false&include=*.xml&initialDelay=1000&readLock=changed]. Will try again at next poll. Caused by: [java.util.regex.PatternSyntaxException - Dangling meta character '*' near index 0
*.xml
^]
java.util.regex.PatternSyntaxException: Dangling meta character '*' near index 0
*.xml
^
    at java.util.regex.Pattern.error(Pattern.java:1713)
    at java.util.regex.Pattern.sequence(Pattern.java:1878)
    at java.util.regex.Pattern.expr(Pattern.java:1752)
    at java.util.regex.Pattern.compile(Pattern.java:1460)
    at java.util.regex.Pattern.<init>(Pattern.java:1133)
    at java.util.regex.Pattern.compile(Pattern.java:823)
    at java.util.regex.Pattern.matches(Pattern.java:928)
    at java.lang.String.matches(String.java:2090)
    at org.apache.camel.component.file.GenericFileConsumer.isMatched(GenericFileConsumer.java:458)
    at org.apache.camel.component.file.GenericFileConsumer.isValidFile(GenericFileConsumer.java:395)
    at org.apache.camel.component.file.FileConsumer.pollDirectory(FileConsumer.java:94)
    at org.apache.camel.component.file.GenericFileConsumer.poll(GenericFileConsumer.java:107)
    at org.apache.camel.impl.ScheduledPollConsumer.doRun(ScheduledPollConsumer.java:142)
    at org.apache.camel.impl.ScheduledPollConsumer.run(ScheduledPollConsumer.java:92)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

好吧，也许是我的错.我把整个文件都包括在内:

ok maybe my bad. I put whole file to include:

<from uri="file://{{fdr.folder.working.url}}&amp;include=20120523.173227.CustomerMaster05092012.QWERTY.xml"/>

整个文件没问题.让我们试着把 * 放在文件名的中间

Whole file is OK. Let's try put * in the middle of file name

<from uri="file://{{fdr.folder.working.url}}&amp;include=20120523.*.xml"/>

再一次没问题.让我们在文件名中只输入一位

and again it is OK. Let's put only one digit in file name

<from uri="file://{{fdr.folder.working.url}}&amp;include=2*.xml"/>

noup，camel 没有找到这样的文件我尝试转义星号，但没有帮助.

noup, camel didn't find such files I tried escaped asterisk but it did't help.

<from uri="file://{{fdr.folder.working.url}}&amp;include=\*.xml"/>
and
<from uri="file://{{fdr.folder.working.url}}&amp;include=\\*.xml"/>

文件被忽略了.所以问题1:如何使用星号?

File was just ignored. so question 1: how to use asterisk?

和问题 2:如何使用多个文件扩展名，例如 include=.xml;.zip

and question 2: how to use multimple file extensions, like include=.xml;.zip

谢谢

推荐答案

该死的，好的想法随之而来，使用蛮力我发现了正确的包含值:

damn, good thinking comes after, using brute force I found out correct value for include:

.*.xml|.*.zip

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