Concurrent logging to same log file

Hi,

I'm using Java Logging API for logging. I'm planning to let the same application run on several servers, and they all should write things into the same log file in the file system.

Is that possible? Are there any prerequisites to do that? I couldn't find any hints in the Logging API documentation nor in this forum.

Thanks in advance!

Mike

[381 byte] By [micro5a] at [2007-11-27 11:13:38]
# 1

ive never used a logging api so take my advice with a grain of salt...

id imagine you'd create a queue that takes Strings.

this thread-safe queue would be where all the messages funneled into.

then youd have another thread taking one thing at a time off the queue

and writing it into the file.

So basically all you need is a class with a Queue with 2 methods:

synchronized void addLogMessage(string)

synchronized String getNextLogMessage()

http://java.sun.com/j2se/1.5.0/docs/api/java/util/Queue.html

TuringPesta at 2007-7-29 14:02:02 > top of Java-index,Java Essentials,Java Programming...
# 2

TuringPest, I believe he is talking about seperate applications, not seperate threads in a single application. So if this is true, my advice to the OP is to simply NOT have the applications share a single log file. That's not what logging (to files anyway) is for. A log file is more for diagnostics of a single application.

warnerjaa at 2007-7-29 14:02:02 > top of Java-index,Java Essentials,Java Programming...
# 3

@TuringPest,

Java Logging API is a feature since Java 1.4, quite useful.

Before I start creating workarounds I'd like to know whether Logging API can handle concurrent logging requests into the same file.

micro5a at 2007-7-29 14:02:02 > top of Java-index,Java Essentials,Java Programming...
# 4

@warnerja,

It's about separate applications, that's right.

Logging API can handle a broad range of log levels, from diagnostical logs to informational ones. Diagnostical logs I would of course store on the individual servers but I need a short, centrally stored summary of what all the application instances have done.

micro5a at 2007-7-29 14:02:02 > top of Java-index,Java Essentials,Java Programming...
# 5

> @TuringPest,

> Java Logging API is a feature since Java 1.4, quite

> useful.

>

> Before I start creating workarounds I'd like to know

> whether Logging API can handle concurrent logging

> requests into the same file.

I don't think it can, as I recall. Log4J can, though

georgemca at 2007-7-29 14:02:02 > top of Java-index,Java Essentials,Java Programming...
# 6

> I don't think it can, as I recall. Log4J can, though

I thought they were equivalent? But thanks for the hint.

Message was edited by:

micro5

micro5a at 2007-7-29 14:02:02 > top of Java-index,Java Essentials,Java Programming...
# 7

anyone?

micro5a at 2007-7-29 14:02:02 > top of Java-index,Java Essentials,Java Programming...
# 8

Anyone what? Do you still have a question?

DrClapa at 2007-7-29 14:02:02 > top of Java-index,Java Essentials,Java Programming...