topic Re: for writing json files in append mode . in Talend Studio

for writing json files in append mode .

gpinumalla — Thu, 07 Jan 2021 22:59:03 GMT

Hi all,

Currerntly working on automating parsing json files and wiriting json files in the append mode . is it possible?

Re: for writing json files in append mode .

Anonymous — Fri, 08 Jan 2021 04:44:35 GMT

Hello

The official Json output component does not support append model, you can have a look at the JSONDoc* components shared by jlolling on Talend Exchange.

https://exchange.talend.com/#marketplaceproductoverview:marketplace=marketplace%252F1&p=marketplace%252F1%252Fproducts%252F1438&pi=marketplace%252F1%252Fproducts%252F1438%252Fitems%252F2887

Regards

Shong

Re: for writing json files in append mode .

juk777 — Fri, 08 Jan 2021 15:44:00 GMT

A real JSON append mode is not possible if you are filling an array, because of the ending "]". The file must be completly rewriten.

In Java, you can do a routine that do that, but you have to read the complete json file first.

An idea is to put all your updates in a list (all your rows) and then call a routine that read the json file, put the array in the structure and write a new file.