Hi All,
Let's find out what the use-case is from the user first. If the JSON is
generated on the fly or without a backing model, it may not be possible to
use Jackson. Also you are assuming the user is also using Jackson, which
may not be the case.
Gary
On Fri, Aug 11, 2017 at 1:39 PM, Mikael Ståldal <mi...@apache.org> wrote:
> Note that if we add such option to JsonLayout, then all log messages
> passed to that layout need to be well-formed JSON, otherwise the output
> will not be well-formed JSON. We would make it easy for the user to shoot
> himself in the foot.
>
> I think it would be better to create a new subclass of Message,
> JsonMessage, and let JsonLayout handle such messages specially and output
> as a nested JSON structure (instead as a quoted and escaped string as
> today).
>
> However, how do we represent a JSON structure without adding dependency on
> Jackson or other 3rd party JSON library? Message subcasses are in
> log4j-api, and we do not want log4j-api to depend on any such library. Or
> maybe we should put this new JsonMessage in log4j-core? Or maybe put it in
> a new log4j-json module?
>
> Should we also have XmlMessage for XmlLayout?
>
> What about YamlLayout?
>
>
> On 2017-08-11 16:56, Gary Gregory wrote:
>
>> Hello,
>>
>> The JSON layout outputs the log event in JSON, the event message is just a
>> string in that event, in this case, it is escaped following the JSON rules
>> to remain a string.
>>
>> If you want a JSON object back out of the event message you will have to
>> parse it out of that string.
>>
>> Feel free to provide a PR on GitHub if you want to add an option to allow
>> for a JSON object as the log message. I am not sure if it would be
>> accepted
>> though as it is quite different from the current design.
>>
>> Thoughts from the community?
>>
>> Gary
>>
>>
>> On Aug 11, 2017 07:53, "Jeus Geek" <alkhand...@gmail.com> wrote:
>>
>> i will show JSON object as a JSON object in log4j2 when is that configed
>> JSONLayout .
>>
>> JSON object:
>>
>> {"line_id": 12,"play_name":"Jeus"}
>>
>> import org.apache.logging.log4j.LogManager;import
>> org.apache.logging.log4j.Logger;
>> public class Main {
>>
>> private static final Logger LOGGER = LogManager.getLogger(Main.
>> class);
>>
>> public static void main(String[] args) {
>>
>>
>> String message = "{\"line_id\": 12,\"play_name\": \"Jeus\"}";
>> LOGGER.info(message);
>>
>> }
>> }
>>
>> output is:
>>
>> {
>> "timeMillis":1502361394238,
>> "thread":"main",
>> "level":"INFO",
>> "loggerName":"com.jeus.logger.json.loggerjson.Main",
>> "message":"{\"line_id\": 12,\"play_name\": \"Jeus\"}",
>> "endOfBatch":false,
>> "loggerFqcn":"org.apache.logging.log4j.spi.AbstractLogger",
>> "contextMap":[
>>
>> ],
>> "threadId":1,
>> "threadPriority":5,
>> "source":{
>> "class":"com.jeus.logger.json.loggerjson.Main",
>> "method":"main",
>> "file":"Main.java",
>> "line":62
>> }
>> }
>>
>> but i will show message as a json object same this:
>>
>> "message":{"line_id": 12,"play_name":"Jeus"},
>>
>> you can see more detail about my problem in stackOverflow
>> <https://stackoverflow.com/questions/45611509/add-json-
>> object-to-log4j2-when-is-jsonlayout?noredirect=1#comment7821
>> 7774_45611509>
>>
>>
>> thank you for attention
>>
>>
>
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