骆驼：拆分收集和写入文件 [英] Camel: Splitting a collection and writing to files

问题描述

我正尝试拆分一个ArrayList和写作每个元素在汇入作业本简单的例子使用Apache的骆驼像自己的文件：

I´m trying to split an ArrayList and writing each element to it´s own file using Apache Camel like in this simplified example:

from("timer://poll?period=10000").process(new Processor(){
    public void process(Exchange exchange){
        ArrayList<String> list = new ArrayList<String>();
        list.add("one");
        list.add("two");
        list.add("three");
        exchange.getIn().setBody(list, ArrayList.class);
    }
}).split(body()).log(body().toString()).to("file:some/dir");

日志打印每一个项目，但只有三国被保存到一个文件中。我在做什么错了？

The log prints each item but only "three" is saved to a file. What am I doing wrong?

月

推荐答案

文件生产者将默认为覆盖，如果文件已经存在。

The file producer will by default "override" if a file already exists.

查看fileExist选择在其文档页面
http://camel.apache.org/file2

See the fileExist option at its documentation page http://camel.apache.org/file2

由于输入到该路由也是一个文件，则生产者将来自输入继承的文件名。

Since the input to this route is also a file, then the producer will "inherit" the file name from the input.

所以你的情况，如果你想保存每个分裂的消息在一个新的文件，那么你就需要设置一个目标文件名，使用文件名选项

So in your case if you want to save each splitted message in a new file, then you would need to set a target file name, using the fileName option

"file:some/dir?fileName=splitted-${id}"

filename选项支持简单和文件的语言

The fileName option supports the simple and file language

http://camel.apache.org/simple.html

http://camel.apache.org/file-language.html

这意味着该文件名可以是动态的计算，如上述，其中$ {ID}是一个唯一的消息ID。

That means the file name can be dynamic computed, such as above, where ${id} is an unique message id.

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