Aw: Re: Split Kafka JSON String

[Daniela S]

Hi,

 

thank you very much for your answers. But unfortunately I do not have a JSON object yet, I only have a String, containing a JSON object. I receive the Strings from Kafka but I do not know how to get the information out of the String.

 

example: {"timestamp": 1463335828342, "ID":570,"command":"START"}

 

I would like to extract the three fields out of the String. Then I would like to store it into Redis.

Afterwards I would like to pull all the stored (active) devices out of Redis and to build a sum over all the devices every minute. For building the sum I have to add another value for every device. I would like to use Redis as a kind of cache.

 

Regards,

Daniela

 

Gesendet: Sonntag, 15. Mai 2016 um 20:06 Uhr
Von: "Henry Hottelet" <hotte...@gmail.com>
An: user@storm.apache.org
Betreff: Re: Split Kafka JSON String

Try using intellij plug in that converts json to pojo classes

On May 15, 2016 2:04 PM, "Nathan Leung" <ncle...@gmail.com> wrote:

Easiest way is to map your job to a pojo and use Jackson or gson to convert the json.

On May 15, 2016 1:48 PM, "Daniela S" <daniela_4...@gmx.at> wrote:

Hi

 

I am receiving Strings of JSON from Kafka. I would like to split the string to get each field from the JSON object to store it into Redis.

How can I split the string and assign the parts to variables?

 

Thank you in advance.

 

Regards,

Daniela