On Mon, 2005-01-31 at 16:27, Curt Arnold wrote:
> and these messages were dispatched to two distinct appenders (possibly
> of different types) and that one instance of Chainsaw was listening to
> both, it could determine that which logging events came from the same
> iteration of the loop.
An assign sequence number method could first check if a sequence number
was already assigned:
class LoggingEvent ... {
public synchronized void assignNewSequenceNumber(long count) {
if (this.sequenceNumber != 0)
return;
this.sequenceNumber = count;
}
}
class ChainsawAppender {
long seq = 0;
public synchronized void doAppend(LoggingEvent le) {
le.assignSequenceNumber(seq++);
}
}
Or:
class LoggingEvent ... {
static long count;
private synchronized void writeObject() {
if (this.sequenceNumber == 0) {
synchronized (LoggingEvent.class) {
this.sequenceNumber = count++;
}
}
}
}
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