Hi,
I have a question about Servlet + singleton_pattern_class :-)
Can we be very sure that -->
in any Servlet engine, our singleton_pattern_class will only have
one instance? :-)
Thanks in advance!
Bo
Oct.20, 2000
Steven Owens wrote:
> > Hi, I have a need to write to a file from multiple servlets,
> > possibly all sending requests at the same time. So, I have an object
> > which is created in the init() routine of one of my servlets, as
> > follows:
> > [...]
> > This is all working, pretty much. But I am confused about how to
> > ensure that the object is initialized before other servlets attempt
> > to use it?
>
> Go look up the "singleton" pattern. The basic details are:
>
> give the pieLog class a private constructor
>
> give the class an instance variable that holds a reference to an
> instance of pieLog
>
> give the pieLog class a static getPieLog() method that:
>
> 1) if the instance variable is null, calls the private
> constructor
>
> 2) returns the object inside the instance variable,
>
> It's late, I'm tired, I haven't even looked at source code in a
> month or two, and haven't looked at a singleton in many months, so go
> read up on it. It's been discussed many, many times.
>
> Steven J. Owens
> [EMAIL PROTECTED]
>
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