java 如何将标头设置为 Apache Camel 中的属性文件中的值
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How to set a header to a value from a properties file in Apache Camel
提问by Ahmad Y. Saleh
Is it possible to set a message header to a value read from a properties file, using the camel Properties Component? I can set such properties to URI options, but I'm unable to set them as a header values.
是否可以使用骆驼属性组件将消息头设置为从属性文件读取的值？我可以将此类属性设置为 URI 选项，但我无法将它们设置为标头值。
I need something like this:
我需要这样的东西：
<camel:setHeader headerName="actionId">
<camel:constant>{{onus.transPosting.RtSFailed}}</camel:constant>
</camel:setHeader>
where onus.transPosting.RtSFailedis a property key set on a file imported using camel Properties Component.
在onus.transPosting.RtSFailed使用骆驼属性组件导入的文件上设置的属性键在哪里。
Note: I'm using Apache Camel 2.10.1
注意：我使用的是 Apache Camel 2.10.1
UPDATE
更新
Using the <propertyPlaceholder>as suggested by this discussiondid not work and it causes an exception:
使用本讨论中<propertyPlaceholder>建议的无效并导致异常：
Caused by: org.apache.camel.language.simple.types.SimpleParserException: Unknown function: onus.transPosting.RtSFailed
Caused by: org.apache.camel.language.simple.types.SimpleParserException: Unknown function: onus.transPosting.RtSFailed
回答by Claus Ibsen
Yes you can, use the simple language which has a properties function: http://camel.apache.org/simple
是的，您可以使用具有属性功能的简单语言：http: //camel.apache.org/simple
<camel:setHeader headerName="actionId">
<camel:simple>${properties:onus.transPosting.RtSFailed}</camel:simple>
</camel:setHeader>
Though I think we have fixed in latest Camel releases that < camel:constant > will resolve property placeholders as well.
虽然我认为我们已经在最新的 Camel 版本中修复了 <camel:constant> 也将解析属性占位符。
