What is the closest to ConcurrentHashMap and NavigableMap in Java?

[Charles Hixson]

On 11/14/2013 01:36 PM, ilya-stromberg wrote:
> On Thursday, 14 November 2013 at 21:31:52 UTC, Jacek Furmankiewicz wrote:
>> hashmap per thread is not an option. The cache may be a few GBs of 
>> data, there is no way we can duplicate that data per thread.
>>
>> Not to mention the start up time when we have to warm up the cache.
>
> How often do you change the data? Probably, you should use `immutable` 
> variables.
>
Immutable variables are nice when they can be used.  Often, however, 
they can't.

I think that for the "concurrent hashmap" the best answer is probably to 
run the map in a thread, with message passing access whether for read or 
write.  And I wouldn't be surprised if that's how Java's concurrent 
hashmap is implemented under the covers. (OTOH, I haven't ever debugged 
such a setup.  Someone who has may have a better answer.)

-- 
Charles Hixson