How to make a permanent readstream

[jinzho...@gisticinc.com]

Scenario: I have a log file on server. One service consistently writes information to this file. I want to process every piece of massage wrote to the file and output to some destination.

Idea: If a read stream can keep in flowing mode and its "end" event never be emitted, I believe it will read every new line attached to the log file.

Question: Can we set a read stream permanent? Or, Can we use method to delete end symbol of the file therefore read stream never knows the file is end and keeps reading "null"s?

[Joe Langeway]

I agree that a mode for reading a growing file would be useful, but if the mean time, have you tried spawning a child progress of ‘tail -f $FILE’ and reading its standard out? That’d be a performance problem if you’ve got lots of these but in the situation you describe I think it’d work fine.