Re: [netcdf-java] Variable object thread safe?

• To: "John Caron" <caron@xxxxxxxxxxxxxxxx>
• Subject: Re: [netcdf-java] Variable object thread safe?
• From: "Jon Blower" <jdb@xxxxxxxxxxxxxxxxxxxx>
• Date: Wed, 17 Sep 2008 14:20:44 +0100

Ah, I see, good to know.
Jon

On Tue, Sep 16, 2008 at 4:39 PM, John Caron <caron@xxxxxxxxxxxxxxxx> wrote:
>
>
> Jon Blower wrote:
>> So presumably if you use the NetCDF file cache, you have to do the
>> synchronization yourself, since you might be transparently sharing
>> file handles?  That's an aspect of the cache that hadn't occurred to
>> me before...
>
> The way that the cache is designed to work is that you get back a NetcdfFile 
> object, which should then used only in a single thread so you dont need 
> synchronization ("thread-confinement"), such as to answer a single request in 
> a server. Until you release that NetcdfFile object, no one else can get it 
> from the cache. If another request is made for that same NetcdfFile while its 
> locked, a new NetcdfFile is opened.
>
> And of course, the cache itself is thread-safe. So if you use it properly, 
> you never have to do synchronization yourself.
>



-- 
Dr Jon Blower
Technical Director, Reading e-Science Centre
Environmental Systems Science Centre
University of Reading
Harry Pitt Building, 3 Earley Gate
Reading RG6 6AL. UK
Tel: +44 (0)118 378 5213
Fax: +44 (0)118 378 6413
j.d.blower@xxxxxxxxxxxxx
http://www.nerc-essc.ac.uk/People/Staff/Blower_J.htm

• References:
  • [netcdf-java] Variable object thread safe?
    • From: Stuart Maclean
  • Re: [netcdf-java] Variable object thread safe?
    • From: John Caron
  • Re: [netcdf-java] Variable object thread safe?
    • From: Jon Blower
  • Re: [netcdf-java] Variable object thread safe?
    • From: John Caron