Apache NIFi MergeContent processor - set demarcator as new line

问题

I want to use MergeContent processor to merge tweets to bulk insert into Elasticsearch index. For this I need command and tweets (each) to be separated by \n. This is how it should look like

{ action: { metadata }}\n
{ request body        }\n

Which will be

{ “index”}
{ tweet1 }
{ tweet2 } 

When I put \n as separator the processor actually adds \n as a string instead of new line separator. Is it possible to make it actual new line? Also is it possible to leave or make footer empty?

Thanks in advance.

回答1:

You are correct in that it takes the literal representation of what is entered. There are two ways to handle this:

1. With delimiter strategy of 'Text': Hit shift + enter to provide a new line
2. With delimiter strategy of 'Filename': Provide a path to a file that is only a newline character

With regards to your question on leaving the footer empty, it should work as you anticipate for the Merge Format of 'Binary Concatenation.' Making a quick test flow, I have verified this, but please let us know if it is not working for your particular configuration.

来源：https://stackoverflow.com/questions/34257508/apache-nifi-mergecontent-processor-set-demarcator-as-new-line