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#comment78217774_45611509>
thank you for attention
---------------------------------------------------------------------
To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org
For additional commands, e-mail: log4j-user-h...@logging.apache.org
