How to write specific logs to different files ? about tinylog

[pmwmedia]

1. All my error logs and the info, some debug logs are jumbled into a single file. How can I separate these, such that they come into a single file say "errors.log" and info strings come into another file say "messages.log"?

Currently that it is only partly possible. You can write all error log entries in a log file and all info log entries and higher to another one. But you cannot write info log entries without also writing warning and error log entries to a log file.

tinylog.writer1 = file
tinylog.writer1.filename = errors.log
tinylog.writer1.level = error

tinylog.writer2 = file
tinylog.writer2.filename = messages.log
tinylog.writer2.level = info

Maybe you are looking for tinylog 2.0. It is still under development, but tag support is already implemented. With tags you can excatly do, what you want. (see: #6)

2. I want the timestamp to be in microseconds that mean like, data: Time in "HH:mm:ss:milli-seconds:Micro-seconds". Is there any way to do?

Yes, that is possible for timestamp labeler and in the format pattern. You just have to use three upper case S:

tinylog.writer.label = timestamp: yyyy-MM-dd HH-mm-ss-SSS
tinylog.format = {date:yyyy-MM-dd HH:mm:ss:SSS} {class}.{method}()\n{level}: {message}

[Hema-Chandra]

@pmwmedia Thanks for the fast reply. Using three upper case S: logs entries in milli-seconds right? I wanted the time stamp in Micro-seconds. Is it possible to do so?

I didn't understand clearly what "But you cannot write info log entries without also writing warning nd error log entries to a log file." this means. Can you please elaborate more.

[pmwmedia]

Using three upper case S: logs entries in milli-seconds right? I wanted the time stamp in Micro-seconds. Is it possible to do so?

Sorry, I mixed milliseconds and microseconds. Microseconds are currently not supported. If you like, you can describe the use case and create a feature request for tinylog 2.

I didn't understand clearly what "But you cannot write info log entries without also writing warning nd error log entries to a log file." this means. Can you please elaborate more.

You can define multiple writers and define for each another severity level. For example, a writer with the severity level INFO will output all log entries with the severity level INFO, WARNING and ERROR. A writer withe severity level ERROR will output only log entries with the severity level ERROR. If you have a file writer with the severity level INFO and a second file writer with the severity level ERROR, you will have a log file that contains all log entries with severity level INFO and above as well as a second log file that contains only log entries with severity level ERROR. Of course this works for all writers incldung the rolling file writer.

[Hema-Chandra]

Thank you sir. I wanted to make the micro-seconds logging as a feature. We work on stock-exchange market. As a result we will be having continuous changing of data every micro-seconds, so we need to log the data at that particular micros. Is there any way to do so? Or else you can suggest any other library that can log in Micro-seconds. But , I love tinylog. It's parallel thread logging helped me a lot.

[pmwmedia]

I don't know any other logging framework which is supporting microseconds logging. Currently I'm experimenting with implementing support for microseconds and nanoseconds. The solution has to be fast (good performance) and intuitive.

[pmwmedia]

I have just released the first release candidate of tinylog 1.3. Microseconds (SSSSSS) and nanoseconds (n, N) are supported now on Java 9. Both work only with Java 9 as previous versions of Java don't provide any API to receive the current date with micro- or nanoseconds.

@Hema-Chandra Feedback is welcome :)

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